2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/metadata/object-internals.h>
32 #include <mono/metadata/mono-debug-debugger.h>
33 #include <mono/utils/monobitset.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/mono-threads-coop.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
44 #include <mono/utils/mono-error-internals.h>
45 #include <mono/utils/os-event.h>
46 #include <mono/utils/mono-threads-debug.h>
47 #include <mono/metadata/w32handle.h>
48 #include <mono/metadata/w32event.h>
49 #include <mono/metadata/w32mutex.h>
51 #include <mono/metadata/reflection-internals.h>
52 #include <mono/metadata/abi-details.h>
53 #include <mono/metadata/w32error.h>
54 #include <mono/utils/w32api.h>
60 #if defined(HOST_WIN32)
64 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
65 #define USE_TKILL_ON_ANDROID 1
68 #ifdef PLATFORM_ANDROID
71 #ifdef USE_TKILL_ON_ANDROID
72 extern int tkill (pid_t tid, int signal);
76 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
77 #define THREAD_DEBUG(a)
78 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
79 #define THREAD_WAIT_DEBUG(a)
80 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
81 #define LIBGC_DEBUG(a)
83 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
84 #define SPIN_LOCK(i) do { \
85 if (SPIN_TRYLOCK (i)) \
89 #define SPIN_UNLOCK(i) i = 0
91 #define LOCK_THREAD(thread) lock_thread((thread))
92 #define UNLOCK_THREAD(thread) unlock_thread((thread))
104 typedef struct _StaticDataFreeList StaticDataFreeList;
105 struct _StaticDataFreeList {
106 StaticDataFreeList *next;
114 StaticDataFreeList *freelist;
117 /* Number of cached culture objects in the MonoThread->cached_culture_info array
118 * (per-type): we use the first NUM entries for CultureInfo and the last for
119 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
121 #define NUM_CACHED_CULTURES 4
122 #define CULTURES_START_IDX 0
123 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
125 /* Controls access to the 'threads' hash table */
126 static void mono_threads_lock (void);
127 static void mono_threads_unlock (void);
128 static MonoCoopMutex threads_mutex;
130 /* Controls access to the 'joinable_threads' hash table */
131 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
132 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
133 static mono_mutex_t joinable_threads_mutex;
135 /* Holds current status of static data heap */
136 static StaticDataInfo thread_static_info;
137 static StaticDataInfo context_static_info;
139 /* The hash of existing threads (key is thread ID, value is
140 * MonoInternalThread*) that need joining before exit
142 static MonoGHashTable *threads=NULL;
144 /* List of app context GC handles.
145 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
147 static GHashTable *contexts = NULL;
149 /* Cleanup queue for contexts. */
150 static MonoReferenceQueue *context_queue;
153 * Threads which are starting up and they are not in the 'threads' hash yet.
154 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
155 * Protected by mono_threads_lock ().
157 static MonoGHashTable *threads_starting_up = NULL;
160 /* Protected by the threads lock */
161 static GHashTable *joinable_threads;
162 static int joinable_thread_count;
164 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
165 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
167 /* function called at thread start */
168 static MonoThreadStartCB mono_thread_start_cb = NULL;
170 /* function called at thread attach */
171 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
173 /* function called at thread cleanup */
174 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
176 /* The default stack size for each thread */
177 static guint32 default_stacksize = 0;
178 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
180 static void context_adjust_static_data (MonoAppContext *ctx);
181 static void mono_free_static_data (gpointer* static_data);
182 static void mono_init_static_data_info (StaticDataInfo *static_data);
183 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
184 static gboolean mono_thread_resume (MonoInternalThread* thread);
185 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
186 static void self_abort_internal (MonoError *error);
187 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
188 static void self_suspend_internal (void);
190 static MonoException* mono_thread_execute_interruption (void);
191 static void ref_stack_destroy (gpointer rs);
193 /* Spin lock for InterlockedXXX 64 bit functions */
194 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
195 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
196 static mono_mutex_t interlocked_mutex;
198 /* global count of thread interruptions requested */
199 static gint32 thread_interruption_requested = 0;
201 /* Event signaled when a thread changes its background mode */
202 static MonoOSEvent background_change_event;
204 static gboolean shutting_down = FALSE;
206 static gint32 managed_thread_id_counter = 0;
208 /* Class lazy loading functions */
209 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
212 mono_threads_lock (void)
214 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
218 mono_threads_unlock (void)
220 mono_locks_coop_release (&threads_mutex, ThreadsLock);
225 get_next_managed_thread_id (void)
227 return InterlockedIncrement (&managed_thread_id_counter);
231 INTERRUPT_REQUESTED_BIT = 0x1,
232 INTERRUPT_REQUEST_DEFERRED_BIT = 0x2,
233 ABORT_PROT_BLOCK_SHIFT = 2,
234 ABORT_PROT_BLOCK_BITS = 8,
235 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
239 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
241 gsize state = thread->thread_state;
242 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
246 verify_thread_state (gsize state)
248 //can't have both INTERRUPT_REQUESTED_BIT and INTERRUPT_REQUEST_DEFERRED_BIT set at the same time
249 g_assert ((state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) != (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT));
251 //XXX This would be nice to be true, but can happen due to self-aborts (and possibly set-pending-exception)
252 //if prot_count > 0, INTERRUPT_REQUESTED_BIT must never be set
253 // int prot_count = (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
254 // g_assert (!(prot_count > 0 && (state & INTERRUPT_REQUESTED_BIT)));
258 mono_threads_begin_abort_protected_block (void)
260 MonoInternalThread *thread = mono_thread_internal_current ();
261 gsize old_state, new_state;
263 old_state = thread->thread_state;
264 verify_thread_state (old_state);
266 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
269 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) {
270 if (old_state & INTERRUPT_REQUESTED_BIT)
271 printf ("begin prot happy as it demoted interrupt to deferred interrupt\n");
272 new_state |= INTERRUPT_REQUEST_DEFERRED_BIT;
275 //bounds check abort_prot_count
276 g_assert (new_val > 0);
277 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
278 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
280 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
284 mono_threads_end_abort_protected_block (void)
286 MonoInternalThread *thread = mono_thread_internal_current ();
287 gsize old_state, new_state;
289 old_state = thread->thread_state;
290 verify_thread_state (old_state);
292 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
295 if ((old_state & INTERRUPT_REQUEST_DEFERRED_BIT) && new_val == 0) {
296 printf ("end abort on alert, promoted deferred to pront interrupt\n");
297 new_state |= INTERRUPT_REQUESTED_BIT;
300 //bounds check abort_prot_count
301 g_assert (new_val >= 0);
302 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
303 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
305 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
306 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
310 //Don't use this function, use inc/dec below
312 mono_thread_abort_prot_block_count_add (MonoInternalThread *thread, int val)
314 gsize old_state, new_state;
316 old_state = thread->thread_state;
317 verify_thread_state (old_state);
319 int new_val = val + ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
320 //bounds check abort_prot_count
321 g_assert (new_val >= 0);
322 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
323 new_state = (old_state & ~ABORT_PROT_BLOCK_MASK) | (new_val << ABORT_PROT_BLOCK_SHIFT);
325 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
329 mono_thread_inc_abort_prot_block_count (MonoInternalThread *thread)
331 mono_thread_abort_prot_block_count_add (thread, 1);
335 mono_thread_dec_abort_prot_block_count (MonoInternalThread *thread)
337 mono_thread_abort_prot_block_count_add (thread, -1);
341 mono_thread_get_interruption_requested (MonoInternalThread *thread)
343 gsize state = thread->thread_state;
344 return (state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
347 /* Returns TRUE is there was a state change */
349 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
351 gsize old_state, new_state;
353 old_state = thread->thread_state;
354 verify_thread_state (old_state);
357 if (!(old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)))
359 new_state = old_state & ~(INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT);
360 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
364 /* Returns TRUE is there was a state change */
366 mono_thread_set_interruption_requested (MonoInternalThread *thread)
368 //always force when the current thread is doing it to itself.
369 gboolean force_interrupt = thread == mono_thread_internal_current ();
370 gsize old_state, new_state;
372 old_state = thread->thread_state;
373 verify_thread_state (old_state);
375 int prot_count = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
377 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT))
380 //If there's an outstanding prot block, we queue it
381 if (prot_count && !force_interrupt) {
382 printf ("set interrupt unhappy, as it's only putting a deferred req %d\n", force_interrupt);
383 new_state = old_state | INTERRUPT_REQUEST_DEFERRED_BIT;
385 new_state = old_state | INTERRUPT_REQUESTED_BIT;
386 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
388 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
391 static inline MonoNativeThreadId
392 thread_get_tid (MonoInternalThread *thread)
394 /* We store the tid as a guint64 to keep the object layout constant between platforms */
395 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
398 static void ensure_synch_cs_set (MonoInternalThread *thread)
400 MonoCoopMutex *synch_cs;
402 if (thread->synch_cs != NULL) {
406 synch_cs = g_new0 (MonoCoopMutex, 1);
407 mono_coop_mutex_init_recursive (synch_cs);
409 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
410 synch_cs, NULL) != NULL) {
411 /* Another thread must have installed this CS */
412 mono_coop_mutex_destroy (synch_cs);
418 lock_thread (MonoInternalThread *thread)
420 if (!thread->synch_cs)
421 ensure_synch_cs_set (thread);
423 g_assert (thread->synch_cs);
425 mono_coop_mutex_lock (thread->synch_cs);
429 unlock_thread (MonoInternalThread *thread)
431 mono_coop_mutex_unlock (thread->synch_cs);
434 static inline gboolean
435 is_appdomainunloaded_exception (MonoClass *klass)
437 return klass == mono_class_get_appdomain_unloaded_exception_class ();
440 static inline gboolean
441 is_threadabort_exception (MonoClass *klass)
443 return klass == mono_defaults.threadabortexception_class;
447 * A special static data offset (guint32) consists of 3 parts:
449 * [0] 6-bit index into the array of chunks.
450 * [6] 25-bit offset into the array.
451 * [31] Bit indicating thread or context static.
456 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
467 } SpecialStaticOffset;
469 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
470 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
472 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
473 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
474 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
475 (((SpecialStaticOffset *) &(x))->fields.f)
478 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
480 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
482 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
483 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
485 return ((char *) thread->static_data [idx]) + off;
489 get_context_static_data (MonoAppContext *ctx, guint32 offset)
491 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
493 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
494 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
496 return ((char *) ctx->static_data [idx]) + off;
500 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
502 static MonoClassField *current_thread_field = NULL;
506 if (!current_thread_field) {
507 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
508 g_assert (current_thread_field);
511 mono_class_vtable (domain, mono_defaults.thread_class);
512 mono_domain_lock (domain);
513 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
514 mono_domain_unlock (domain);
517 return (MonoThread **)get_thread_static_data (thread, offset);
521 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
523 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
525 g_assert (current->obj.vtable->domain == domain);
527 g_assert (!*current_thread_ptr);
528 *current_thread_ptr = current;
532 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
538 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
541 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
542 /* only possible failure mode is OOM, from which we don't expect to recover. */
543 mono_error_assert_ok (&error);
545 MONO_OBJECT_SETREF (thread, internal_thread, internal);
550 static MonoInternalThread*
551 create_internal_thread_object (void)
554 MonoInternalThread *thread;
557 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
558 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
559 /* only possible failure mode is OOM, from which we don't exect to recover */
560 mono_error_assert_ok (&error);
562 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
563 mono_coop_mutex_init_recursive (thread->synch_cs);
565 thread->apartment_state = ThreadApartmentState_Unknown;
566 thread->managed_id = get_next_managed_thread_id ();
567 if (mono_gc_is_moving ()) {
568 thread->thread_pinning_ref = thread;
569 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
572 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
574 thread->suspended = g_new0 (MonoOSEvent, 1);
575 mono_os_event_init (thread->suspended, TRUE);
581 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
585 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
586 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
587 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
592 g_assert (internal->native_handle);
594 res = SetThreadPriority (internal->native_handle, priority - 2);
596 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
597 #else /* HOST_WIN32 */
600 struct sched_param param;
603 tid = thread_get_tid (internal);
605 res = pthread_getschedparam (tid, &policy, ¶m);
607 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
609 #ifdef _POSIX_PRIORITY_SCHEDULING
612 /* Necessary to get valid priority range */
614 min = sched_get_priority_min (policy);
615 max = sched_get_priority_max (policy);
617 if (max > 0 && min >= 0 && max > min) {
618 double srange, drange, sposition, dposition;
619 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
621 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
622 dposition = (sposition / srange) * drange;
623 param.sched_priority = (int)(dposition + min);
630 param.sched_priority = 50;
636 param.sched_priority = 0;
639 g_warning ("%s: unknown policy %d", __func__, policy);
644 res = pthread_setschedparam (tid, policy, ¶m);
647 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
650 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
652 #endif /* HOST_WIN32 */
656 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
659 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain, gsize *stack_ptr)
661 MonoThreadInfo *info;
662 MonoInternalThread *internal;
663 MonoDomain *domain, *root_domain;
667 info = mono_thread_info_current ();
669 internal = thread->internal_thread;
670 internal->handle = mono_threads_open_thread_handle (info->handle);
672 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
674 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
675 internal->thread_info = info;
676 internal->small_id = info->small_id;
677 internal->stack_ptr = stack_ptr;
679 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
681 SET_CURRENT_OBJECT (internal);
683 domain = mono_object_domain (thread);
685 mono_thread_push_appdomain_ref (domain);
686 if (!mono_domain_set (domain, force_domain)) {
687 mono_thread_pop_appdomain_ref ();
691 mono_threads_lock ();
693 if (threads_starting_up)
694 mono_g_hash_table_remove (threads_starting_up, thread);
696 if (shutting_down && !force_attach) {
697 mono_threads_unlock ();
702 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
705 /* We don't need to duplicate thread->handle, because it is
706 * only closed when the thread object is finalized by the GC. */
707 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
709 /* We have to do this here because mono_thread_start_cb
710 * requires that root_domain_thread is set up. */
711 if (thread_static_info.offset || thread_static_info.idx > 0) {
712 /* get the current allocated size */
713 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
714 mono_alloc_static_data (&internal->static_data, offset, TRUE);
717 mono_threads_unlock ();
719 root_domain = mono_get_root_domain ();
721 g_assert (!internal->root_domain_thread);
722 if (domain != root_domain)
723 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
725 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
727 if (domain != root_domain)
728 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
730 set_current_thread_for_domain (domain, internal, thread);
732 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
740 MonoObject *start_delegate;
741 MonoObject *start_delegate_arg;
742 MonoThreadStart start_func;
743 gpointer start_func_arg;
745 MonoCoopSem registered;
748 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
751 MonoThreadStart start_func;
752 void *start_func_arg;
755 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
759 MonoInternalThread *internal;
760 MonoObject *start_delegate;
761 MonoObject *start_delegate_arg;
764 thread = start_info->thread;
765 internal = thread->internal_thread;
766 domain = mono_object_domain (start_info->thread);
768 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
770 if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
771 start_info->failed = TRUE;
773 mono_coop_sem_post (&start_info->registered);
775 if (InterlockedDecrement (&start_info->ref) == 0) {
776 mono_coop_sem_destroy (&start_info->registered);
783 mono_thread_internal_set_priority (internal, internal->priority);
787 start_delegate = start_info->start_delegate;
788 start_delegate_arg = start_info->start_delegate_arg;
789 start_func = start_info->start_func;
790 start_func_arg = start_info->start_func_arg;
792 /* This MUST be called before any managed code can be
793 * executed, as it calls the callback function that (for the
794 * jit) sets the lmf marker.
797 if (mono_thread_start_cb)
798 mono_thread_start_cb (tid, stack_ptr, start_func);
800 /* On 2.0 profile (and higher), set explicitly since state might have been
802 if (internal->apartment_state == ThreadApartmentState_Unknown)
803 internal->apartment_state = ThreadApartmentState_MTA;
805 mono_thread_init_apartment_state ();
807 /* Let the thread that called Start() know we're ready */
808 mono_coop_sem_post (&start_info->registered);
810 if (InterlockedDecrement (&start_info->ref) == 0) {
811 mono_coop_sem_destroy (&start_info->registered);
815 /* start_info is not valid anymore */
819 * Call this after calling start_notify, since the profiler callback might want
820 * to lock the thread, and the lock is held by thread_start () which waits for
823 mono_profiler_thread_start (tid);
825 /* if the name was set before starting, we didn't invoke the profiler callback */
826 if (internal->name) {
827 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
828 mono_profiler_thread_name (internal->tid, tname);
829 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
833 /* start_func is set only for unmanaged start functions */
835 start_func (start_func_arg);
839 g_assert (start_delegate != NULL);
841 /* we may want to handle the exception here. See comment below on unhandled exceptions */
842 args [0] = (gpointer) start_delegate_arg;
843 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
845 if (!mono_error_ok (&error)) {
846 MonoException *ex = mono_error_convert_to_exception (&error);
848 g_assert (ex != NULL);
849 MonoClass *klass = mono_object_get_class (&ex->object);
850 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
851 !is_threadabort_exception (klass)) {
852 mono_unhandled_exception (&ex->object);
853 mono_invoke_unhandled_exception_hook (&ex->object);
854 g_assert_not_reached ();
857 mono_error_cleanup (&error);
861 /* If the thread calls ExitThread at all, this remaining code
862 * will not be executed, but the main thread will eventually
863 * call mono_thread_detach_internal() on this thread's behalf.
866 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
868 /* Do any cleanup needed for apartment state. This
869 * cannot be done in mono_thread_detach_internal since
870 * mono_thread_detach_internal could be called for a
871 * thread other than the current thread.
872 * mono_thread_cleanup_apartment_state cleans up apartment
873 * for the current thead */
874 mono_thread_cleanup_apartment_state ();
876 mono_thread_detach_internal (internal);
883 static gsize WINAPI start_wrapper(void *data)
885 volatile gsize dummy;
887 return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
893 * Common thread creation code.
894 * LOCKING: Acquires the threads lock.
897 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
898 gboolean threadpool_thread, guint32 stack_size, MonoError *error)
900 StartInfo *start_info = NULL;
901 MonoThreadHandle *thread_handle;
902 MonoNativeThreadId tid;
904 gsize stack_set_size;
907 g_assert (!start_func && !start_func_arg);
909 g_assert (!start_delegate);
912 * Join joinable threads to prevent running out of threads since the finalizer
913 * thread might be blocked/backlogged.
915 mono_threads_join_threads ();
917 mono_error_init (error);
919 mono_threads_lock ();
921 mono_threads_unlock ();
924 if (threads_starting_up == NULL) {
925 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
927 mono_g_hash_table_insert (threads_starting_up, thread, thread);
928 mono_threads_unlock ();
930 internal->threadpool_thread = threadpool_thread;
931 if (threadpool_thread)
932 mono_thread_set_state (internal, ThreadState_Background);
934 start_info = g_new0 (StartInfo, 1);
936 start_info->thread = thread;
937 start_info->start_delegate = start_delegate;
938 start_info->start_delegate_arg = thread->start_obj;
939 start_info->start_func = start_func;
940 start_info->start_func_arg = start_func_arg;
941 start_info->failed = FALSE;
942 mono_coop_sem_init (&start_info->registered, 0);
945 stack_set_size = default_stacksize_for_thread (internal);
949 thread_handle = mono_threads_create_thread (start_wrapper, start_info, &stack_set_size, &tid);
951 if (thread_handle == NULL) {
952 /* The thread couldn't be created, so set an exception */
953 mono_threads_lock ();
954 mono_g_hash_table_remove (threads_starting_up, thread);
955 mono_threads_unlock ();
956 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
957 /* ref is not going to be decremented in start_wrapper_internal */
958 InterlockedDecrement (&start_info->ref);
963 internal->stack_size = (int) stack_set_size;
965 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
968 * Wait for the thread to set up its TLS data etc, so
969 * theres no potential race condition if someone tries
970 * to look up the data believing the thread has
974 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
976 mono_threads_close_thread_handle (thread_handle);
978 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));
980 ret = !start_info->failed;
983 if (InterlockedDecrement (&start_info->ref) == 0) {
984 mono_coop_sem_destroy (&start_info->registered);
991 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
993 if (mono_thread_start_cb) {
994 mono_thread_start_cb (tid, stack_start, func);
998 void mono_threads_set_default_stacksize (guint32 stacksize)
1000 default_stacksize = stacksize;
1003 guint32 mono_threads_get_default_stacksize (void)
1005 return default_stacksize;
1009 * mono_thread_create_internal:
1011 * ARG should not be a GC reference.
1014 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
1017 MonoInternalThread *internal;
1020 mono_error_init (error);
1022 internal = create_internal_thread_object ();
1024 thread = create_thread_object (domain, internal);
1026 LOCK_THREAD (internal);
1028 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
1029 return_val_if_nok (error, NULL);
1031 UNLOCK_THREAD (internal);
1037 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1040 if (!mono_thread_create_checked (domain, func, arg, &error))
1041 mono_error_cleanup (&error);
1045 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1047 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
1051 mono_thread_attach (MonoDomain *domain)
1053 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1059 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1061 MonoInternalThread *internal;
1063 MonoNativeThreadId tid;
1066 if (mono_thread_internal_current_is_attached ()) {
1067 if (domain != mono_domain_get ())
1068 mono_domain_set (domain, TRUE);
1069 /* Already attached */
1070 return mono_thread_current ();
1073 if (!mono_gc_register_thread (&domain)) {
1074 g_error ("Thread %"G_GSIZE_FORMAT" calling into managed code is not registered with the GC. On UNIX, this can be fixed by #include-ing <gc.h> before <pthread.h> in the file containing the thread creation code.", mono_native_thread_id_get ());
1077 tid=mono_native_thread_id_get ();
1079 internal = create_internal_thread_object ();
1081 thread = create_thread_object (domain, internal);
1083 if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
1084 /* Mono is shutting down, so just wait for the end */
1086 mono_thread_info_sleep (10000, NULL);
1089 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1091 if (mono_thread_attach_cb) {
1095 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1098 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1100 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1103 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1104 if (!mono_thread_info_current ()->tools_thread)
1105 // FIXME: Need a separate callback
1106 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1112 mono_thread_detach_internal (MonoInternalThread *thread)
1116 g_assert (thread != NULL);
1118 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1121 mono_w32mutex_abandon ();
1124 if (thread->abort_state_handle) {
1125 mono_gchandle_free (thread->abort_state_handle);
1126 thread->abort_state_handle = 0;
1129 thread->abort_exc = NULL;
1130 thread->current_appcontext = NULL;
1133 * This is necessary because otherwise we might have
1134 * cross-domain references which will not get cleaned up when
1135 * the target domain is unloaded.
1137 if (thread->cached_culture_info) {
1139 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
1140 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
1144 * thread->synch_cs can be NULL if this was called after
1145 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1146 * This can happen only during shutdown.
1147 * The shutting_down flag is not always set, so we can't assert on it.
1149 if (thread->synch_cs)
1150 LOCK_THREAD (thread);
1152 thread->state |= ThreadState_Stopped;
1153 thread->state &= ~ThreadState_Background;
1155 if (thread->synch_cs)
1156 UNLOCK_THREAD (thread);
1159 An interruption request has leaked to cleanup. Adjust the global counter.
1161 This can happen is the abort source thread finds the abortee (this) thread
1162 in unmanaged code. If this thread never trips back to managed code or check
1163 the local flag it will be left set and positively unbalance the global counter.
1165 Leaving the counter unbalanced will cause a performance degradation since all threads
1166 will now keep checking their local flags all the time.
1168 if (mono_thread_clear_interruption_requested (thread))
1169 InterlockedDecrement (&thread_interruption_requested);
1171 mono_threads_lock ();
1175 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1176 /* We have to check whether the thread object for the
1177 * tid is still the same in the table because the
1178 * thread might have been destroyed and the tid reused
1179 * in the meantime, in which case the tid would be in
1180 * the table, but with another thread object.
1184 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1188 mono_threads_unlock ();
1190 /* Don't close the handle here, wait for the object finalizer
1191 * to do it. Otherwise, the following race condition applies:
1193 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1195 * 2) Some other handle is reassigned the same slot
1197 * 3) Another thread tries to join the first thread, and
1198 * blocks waiting for the reassigned handle to be signalled
1199 * (which might never happen). This is possible, because the
1200 * thread calling Join() still has a reference to the first
1204 /* if the thread is not in the hash it has been removed already */
1206 mono_domain_unset ();
1207 mono_memory_barrier ();
1209 if (mono_thread_cleanup_fn)
1210 mono_thread_cleanup_fn (thread_get_tid (thread));
1215 mono_release_type_locks (thread);
1217 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1218 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1219 mono_profiler_thread_end (thread->tid);
1221 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1224 * This will signal async signal handlers that the thread has exited.
1225 * The profiler callback needs this to be set, so it cannot be done earlier.
1227 mono_domain_unset ();
1228 mono_memory_barrier ();
1230 if (thread == mono_thread_internal_current ())
1231 mono_thread_pop_appdomain_ref ();
1233 thread->cached_culture_info = NULL;
1235 mono_free_static_data (thread->static_data);
1236 thread->static_data = NULL;
1237 ref_stack_destroy (thread->appdomain_refs);
1238 thread->appdomain_refs = NULL;
1240 g_assert (thread->suspended);
1241 mono_os_event_destroy (thread->suspended);
1242 g_free (thread->suspended);
1243 thread->suspended = NULL;
1245 if (mono_thread_cleanup_fn)
1246 mono_thread_cleanup_fn (thread_get_tid (thread));
1248 mono_memory_barrier ();
1250 if (mono_gc_is_moving ()) {
1251 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1252 thread->thread_pinning_ref = NULL;
1256 SET_CURRENT_OBJECT (NULL);
1257 mono_domain_unset ();
1259 /* Don't need to close the handle to this thread, even though we took a
1260 * reference in mono_thread_attach (), because the GC will do it
1261 * when the Thread object is finalised.
1266 mono_thread_detach (MonoThread *thread)
1269 mono_thread_detach_internal (thread->internal_thread);
1273 * mono_thread_detach_if_exiting:
1275 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1276 * This should be used at the end of embedding code which calls into managed code, and which
1277 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1280 mono_thread_detach_if_exiting (void)
1282 if (mono_thread_info_is_exiting ()) {
1283 MonoInternalThread *thread;
1285 thread = mono_thread_internal_current ();
1287 mono_thread_detach_internal (thread);
1288 mono_thread_info_detach ();
1296 mono_thread_internal_current_is_attached (void)
1298 MonoInternalThread *internal;
1300 internal = GET_CURRENT_OBJECT ();
1308 mono_thread_exit (void)
1310 MonoInternalThread *thread = mono_thread_internal_current ();
1312 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1314 mono_thread_detach_internal (thread);
1316 /* we could add a callback here for embedders to use. */
1317 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1318 exit (mono_environment_exitcode_get ());
1320 mono_thread_info_exit (0);
1324 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1326 MonoInternalThread *internal;
1328 internal = create_internal_thread_object ();
1330 internal->state = ThreadState_Unstarted;
1332 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1336 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1338 return mono_thread_current ();
1342 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1346 MonoInternalThread *internal;
1349 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1351 if (!this_obj->internal_thread)
1352 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1353 internal = this_obj->internal_thread;
1355 LOCK_THREAD (internal);
1357 if ((internal->state & ThreadState_Unstarted) == 0) {
1358 UNLOCK_THREAD (internal);
1359 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1363 if ((internal->state & ThreadState_Aborted) != 0) {
1364 UNLOCK_THREAD (internal);
1368 res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1370 mono_error_cleanup (&error);
1371 UNLOCK_THREAD (internal);
1375 internal->state &= ~ThreadState_Unstarted;
1377 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1379 UNLOCK_THREAD (internal);
1380 return internal->handle;
1384 * This is called from the finalizer of the internal thread object.
1387 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1389 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1392 * Since threads keep a reference to their thread object while running, by
1393 * the time this function is called, the thread has already exited/detached,
1394 * i.e. mono_thread_detach_internal () has ran. The exception is during
1395 * shutdown, when mono_thread_detach_internal () can be called after this.
1397 if (this_obj->handle) {
1398 mono_threads_close_thread_handle (this_obj->handle);
1399 this_obj->handle = NULL;
1403 CloseHandle (this_obj->native_handle);
1406 if (this_obj->synch_cs) {
1407 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1408 this_obj->synch_cs = NULL;
1409 mono_coop_mutex_destroy (synch_cs);
1413 if (this_obj->name) {
1414 void *name = this_obj->name;
1415 this_obj->name = NULL;
1421 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1424 MonoInternalThread *thread = mono_thread_internal_current ();
1426 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1428 if (mono_thread_current_check_pending_interrupt ())
1432 gboolean alerted = FALSE;
1434 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1436 res = mono_thread_info_sleep (ms, &alerted);
1438 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1441 MonoException* exc = mono_thread_execute_interruption ();
1443 mono_raise_exception (exc);
1445 // FIXME: !MONO_INFINITE_WAIT
1446 if (ms != MONO_INFINITE_WAIT)
1455 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1460 ves_icall_System_Threading_Thread_GetDomainID (void)
1462 return mono_domain_get()->domain_id;
1466 ves_icall_System_Threading_Thread_Yield (void)
1468 return mono_thread_info_yield ();
1472 * mono_thread_get_name:
1474 * Return the name of the thread. NAME_LEN is set to the length of the name.
1475 * Return NULL if the thread has no name. The returned memory is owned by the
1479 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1483 LOCK_THREAD (this_obj);
1485 if (!this_obj->name) {
1489 *name_len = this_obj->name_len;
1490 res = g_new (gunichar2, this_obj->name_len);
1491 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1494 UNLOCK_THREAD (this_obj);
1500 * mono_thread_get_name_utf8:
1502 * Return the name of the thread in UTF-8.
1503 * Return NULL if the thread has no name.
1504 * The returned memory is owned by the caller.
1507 mono_thread_get_name_utf8 (MonoThread *thread)
1512 MonoInternalThread *internal = thread->internal_thread;
1513 if (internal == NULL)
1516 LOCK_THREAD (internal);
1518 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1520 UNLOCK_THREAD (internal);
1526 * mono_thread_get_managed_id:
1528 * Return the Thread.ManagedThreadId value of `thread`.
1529 * Returns -1 if `thread` is NULL.
1532 mono_thread_get_managed_id (MonoThread *thread)
1537 MonoInternalThread *internal = thread->internal_thread;
1538 if (internal == NULL)
1541 int32_t id = internal->managed_id;
1547 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1552 mono_error_init (&error);
1554 LOCK_THREAD (this_obj);
1556 if (!this_obj->name)
1559 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1561 UNLOCK_THREAD (this_obj);
1563 if (mono_error_set_pending_exception (&error))
1570 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1572 LOCK_THREAD (this_obj);
1574 mono_error_init (error);
1577 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1578 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1579 UNLOCK_THREAD (this_obj);
1581 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1584 if (this_obj->name) {
1585 g_free (this_obj->name);
1586 this_obj->name_len = 0;
1589 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1590 this_obj->name_len = mono_string_length (name);
1593 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1596 this_obj->name = NULL;
1599 UNLOCK_THREAD (this_obj);
1601 if (this_obj->name && this_obj->tid) {
1602 char *tname = mono_string_to_utf8_checked (name, error);
1603 return_if_nok (error);
1604 mono_profiler_thread_name (this_obj->tid, tname);
1605 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1611 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1614 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1615 mono_error_set_pending_exception (&error);
1619 * ves_icall_System_Threading_Thread_GetPriority_internal:
1620 * @param this_obj: The MonoInternalThread on which to operate.
1622 * Gets the priority of the given thread.
1623 * @return: The priority of the given thread.
1626 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1629 MonoInternalThread *internal = this_obj->internal_thread;
1631 LOCK_THREAD (internal);
1632 priority = internal->priority;
1633 UNLOCK_THREAD (internal);
1639 * ves_icall_System_Threading_Thread_SetPriority_internal:
1640 * @param this_obj: The MonoInternalThread on which to operate.
1641 * @param priority: The priority to set.
1643 * Sets the priority of the given thread.
1646 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1648 MonoInternalThread *internal = this_obj->internal_thread;
1650 LOCK_THREAD (internal);
1651 internal->priority = priority;
1652 if (internal->thread_info != NULL)
1653 mono_thread_internal_set_priority (internal, priority);
1654 UNLOCK_THREAD (internal);
1657 /* If the array is already in the requested domain, we just return it,
1658 otherwise we return a copy in that domain. */
1660 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1664 mono_error_init (error);
1668 if (mono_object_domain (arr) == domain)
1671 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1672 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1677 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1680 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1681 mono_error_set_pending_exception (&error);
1686 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1689 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1690 mono_error_set_pending_exception (&error);
1695 mono_thread_current (void)
1697 MonoDomain *domain = mono_domain_get ();
1698 MonoInternalThread *internal = mono_thread_internal_current ();
1699 MonoThread **current_thread_ptr;
1701 g_assert (internal);
1702 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1704 if (!*current_thread_ptr) {
1705 g_assert (domain != mono_get_root_domain ());
1706 *current_thread_ptr = create_thread_object (domain, internal);
1708 return *current_thread_ptr;
1711 /* Return the thread object belonging to INTERNAL in the current domain */
1713 mono_thread_current_for_thread (MonoInternalThread *internal)
1715 MonoDomain *domain = mono_domain_get ();
1716 MonoThread **current_thread_ptr;
1718 g_assert (internal);
1719 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1721 if (!*current_thread_ptr) {
1722 g_assert (domain != mono_get_root_domain ());
1723 *current_thread_ptr = create_thread_object (domain, internal);
1725 return *current_thread_ptr;
1729 mono_thread_internal_current (void)
1731 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1732 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1736 static MonoThreadInfoWaitRet
1737 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1740 MonoThreadInfoWaitRet ret;
1745 mono_error_init (error);
1747 start = (ms == -1) ? 0 : mono_msec_ticks ();
1750 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1753 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1756 exc = mono_thread_execute_interruption ();
1758 mono_error_set_exception_instance (error, exc);
1765 /* Re-calculate ms according to the time passed */
1766 diff_ms = (gint32)(mono_msec_ticks () - start);
1767 if (diff_ms >= ms) {
1768 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1771 wait = ms - diff_ms;
1778 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1780 MonoInternalThread *thread = this_obj->internal_thread;
1781 MonoThreadHandle *handle = thread->handle;
1782 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1786 if (mono_thread_current_check_pending_interrupt ())
1789 LOCK_THREAD (thread);
1791 if ((thread->state & ThreadState_Unstarted) != 0) {
1792 UNLOCK_THREAD (thread);
1794 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1798 UNLOCK_THREAD (thread);
1801 ms=MONO_INFINITE_WAIT;
1803 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1805 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1807 ret=mono_join_uninterrupted (handle, ms, &error);
1809 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1811 mono_error_set_pending_exception (&error);
1813 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1814 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1819 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1824 #define MANAGED_WAIT_FAILED 0x7fffffff
1827 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1829 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1830 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1831 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1832 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1833 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1834 return WAIT_IO_COMPLETION;
1835 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1836 return WAIT_TIMEOUT;
1837 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1838 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1839 return MANAGED_WAIT_FAILED;
1841 g_error ("%s: unknown val value %d", __func__, val);
1845 static MonoW32HandleWaitRet
1846 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1849 MonoW32HandleWaitRet ret;
1854 mono_error_init (error);
1856 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1860 if (numhandles != 1)
1861 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1863 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1865 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1866 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1867 #endif /* HOST_WIN32 */
1870 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1873 exc = mono_thread_execute_interruption ();
1875 mono_error_set_exception_instance (error, exc);
1882 /* Re-calculate ms according to the time passed */
1883 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1884 if (diff_ms >= ms) {
1885 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1888 wait = ms - diff_ms;
1894 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1899 MonoW32HandleWaitRet ret;
1901 MonoObject *waitHandle;
1902 MonoInternalThread *thread = mono_thread_internal_current ();
1904 /* Do this WaitSleepJoin check before creating objects */
1905 if (mono_thread_current_check_pending_interrupt ())
1906 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1908 /* We fail in managed if the array has more than 64 elements */
1909 numhandles = (guint32)mono_array_length(mono_handles);
1910 handles = g_new0(HANDLE, numhandles);
1912 for(i = 0; i < numhandles; i++) {
1913 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1914 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1918 ms=MONO_INFINITE_WAIT;
1921 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1923 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1925 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1929 mono_error_set_pending_exception (&error);
1931 return map_native_wait_result_to_managed (ret, numhandles);
1934 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1937 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1938 uintptr_t numhandles;
1939 MonoW32HandleWaitRet ret;
1941 MonoObject *waitHandle;
1942 MonoInternalThread *thread = mono_thread_internal_current ();
1944 /* Do this WaitSleepJoin check before creating objects */
1945 if (mono_thread_current_check_pending_interrupt ())
1946 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1948 numhandles = mono_array_length(mono_handles);
1949 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1950 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1952 for(i = 0; i < numhandles; i++) {
1953 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1954 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1958 ms=MONO_INFINITE_WAIT;
1961 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1963 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1965 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1967 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1969 mono_error_set_pending_exception (&error);
1971 return map_native_wait_result_to_managed (ret, numhandles);
1974 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1977 MonoW32HandleWaitRet ret;
1978 MonoInternalThread *thread = mono_thread_internal_current ();
1980 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1983 ms=MONO_INFINITE_WAIT;
1986 if (mono_thread_current_check_pending_interrupt ())
1987 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1989 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1991 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1993 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1995 mono_error_set_pending_exception (&error);
1996 return map_native_wait_result_to_managed (ret, 1);
2000 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
2002 MonoW32HandleWaitRet ret;
2003 MonoInternalThread *thread = mono_thread_internal_current ();
2006 ms = MONO_INFINITE_WAIT;
2008 if (mono_thread_current_check_pending_interrupt ())
2009 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2011 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2015 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2017 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2021 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2023 return map_native_wait_result_to_managed (ret, 1);
2026 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2028 return InterlockedIncrement (location);
2031 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2033 #if SIZEOF_VOID_P == 4
2034 if (G_UNLIKELY ((size_t)location & 0x7)) {
2036 mono_interlocked_lock ();
2039 mono_interlocked_unlock ();
2043 return InterlockedIncrement64 (location);
2046 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2048 return InterlockedDecrement(location);
2051 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2053 #if SIZEOF_VOID_P == 4
2054 if (G_UNLIKELY ((size_t)location & 0x7)) {
2056 mono_interlocked_lock ();
2059 mono_interlocked_unlock ();
2063 return InterlockedDecrement64 (location);
2066 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2068 return InterlockedExchange(location, value);
2071 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2074 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2075 mono_gc_wbarrier_generic_nostore (location);
2079 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2081 return InterlockedExchangePointer(location, value);
2084 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2086 IntFloatUnion val, ret;
2089 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2095 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2097 #if SIZEOF_VOID_P == 4
2098 if (G_UNLIKELY ((size_t)location & 0x7)) {
2100 mono_interlocked_lock ();
2103 mono_interlocked_unlock ();
2107 return InterlockedExchange64 (location, value);
2111 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2113 LongDoubleUnion val, ret;
2116 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2121 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2123 return InterlockedCompareExchange(location, value, comparand);
2126 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2128 gint32 r = InterlockedCompareExchange(location, value, comparand);
2129 *success = r == comparand;
2133 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2136 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2137 mono_gc_wbarrier_generic_nostore (location);
2141 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2143 return InterlockedCompareExchangePointer(location, value, comparand);
2146 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2148 IntFloatUnion val, ret, cmp;
2151 cmp.fval = comparand;
2152 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2158 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2160 #if SIZEOF_VOID_P == 8
2161 LongDoubleUnion val, comp, ret;
2164 comp.fval = comparand;
2165 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2171 mono_interlocked_lock ();
2173 if (old == comparand)
2175 mono_interlocked_unlock ();
2182 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2184 #if SIZEOF_VOID_P == 4
2185 if (G_UNLIKELY ((size_t)location & 0x7)) {
2187 mono_interlocked_lock ();
2189 if (old == comparand)
2191 mono_interlocked_unlock ();
2195 return InterlockedCompareExchange64 (location, value, comparand);
2199 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2202 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2203 mono_gc_wbarrier_generic_nostore (location);
2208 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2211 MONO_CHECK_NULL (location, NULL);
2212 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2213 mono_gc_wbarrier_generic_nostore (location);
2218 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2220 return InterlockedAdd (location, value);
2224 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2226 #if SIZEOF_VOID_P == 4
2227 if (G_UNLIKELY ((size_t)location & 0x7)) {
2229 mono_interlocked_lock ();
2232 mono_interlocked_unlock ();
2236 return InterlockedAdd64 (location, value);
2240 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2242 #if SIZEOF_VOID_P == 4
2243 if (G_UNLIKELY ((size_t)location & 0x7)) {
2245 mono_interlocked_lock ();
2247 mono_interlocked_unlock ();
2251 return InterlockedRead64 (location);
2255 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2257 mono_memory_barrier ();
2261 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2263 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2265 if (state & ThreadState_Background) {
2266 /* If the thread changes the background mode, the main thread has to
2267 * be notified, since it has to rebuild the list of threads to
2270 mono_os_event_set (&background_change_event);
2275 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2277 mono_thread_set_state (this_obj, (MonoThreadState)state);
2279 if (state & ThreadState_Background) {
2280 /* If the thread changes the background mode, the main thread has to
2281 * be notified, since it has to rebuild the list of threads to
2284 mono_os_event_set (&background_change_event);
2289 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2293 LOCK_THREAD (this_obj);
2295 state = this_obj->state;
2297 UNLOCK_THREAD (this_obj);
2302 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2304 MonoInternalThread *current;
2306 MonoInternalThread *thread = this_obj->internal_thread;
2308 LOCK_THREAD (thread);
2310 current = mono_thread_internal_current ();
2312 thread->thread_interrupt_requested = TRUE;
2313 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2315 UNLOCK_THREAD (thread);
2318 async_abort_internal (thread, FALSE);
2323 * mono_thread_current_check_pending_interrupt:
2325 * Checks if there's a interruption request and set the pending exception if so.
2327 * @returns true if a pending exception was set
2330 mono_thread_current_check_pending_interrupt (void)
2332 MonoInternalThread *thread = mono_thread_internal_current ();
2333 gboolean throw_ = FALSE;
2335 LOCK_THREAD (thread);
2337 if (thread->thread_interrupt_requested) {
2339 thread->thread_interrupt_requested = FALSE;
2342 UNLOCK_THREAD (thread);
2345 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2350 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2352 LOCK_THREAD (thread);
2354 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2355 (thread->state & ThreadState_StopRequested) != 0 ||
2356 (thread->state & ThreadState_Stopped) != 0)
2358 UNLOCK_THREAD (thread);
2362 if ((thread->state & ThreadState_Unstarted) != 0) {
2363 thread->state |= ThreadState_Aborted;
2364 UNLOCK_THREAD (thread);
2368 thread->state |= ThreadState_AbortRequested;
2369 if (thread->abort_state_handle)
2370 mono_gchandle_free (thread->abort_state_handle);
2372 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2373 g_assert (thread->abort_state_handle);
2375 thread->abort_state_handle = 0;
2377 thread->abort_exc = NULL;
2379 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));
2381 /* During shutdown, we can't wait for other threads */
2383 /* Make sure the thread is awake */
2384 mono_thread_resume (thread);
2386 UNLOCK_THREAD (thread);
2391 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2393 if (!request_thread_abort (thread, state))
2396 if (thread == mono_thread_internal_current ()) {
2398 self_abort_internal (&error);
2399 mono_error_set_pending_exception (&error);
2401 async_abort_internal (thread, TRUE);
2406 * mono_thread_internal_abort:
2408 * Request thread @thread to be aborted.
2410 * @thread MUST NOT be the current thread.
2413 mono_thread_internal_abort (MonoInternalThread *thread)
2415 g_assert (thread != mono_thread_internal_current ());
2417 if (!request_thread_abort (thread, NULL))
2419 async_abort_internal (thread, TRUE);
2423 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2425 MonoInternalThread *thread = mono_thread_internal_current ();
2426 gboolean was_aborting;
2428 LOCK_THREAD (thread);
2429 was_aborting = thread->state & ThreadState_AbortRequested;
2430 thread->state &= ~ThreadState_AbortRequested;
2431 UNLOCK_THREAD (thread);
2433 if (!was_aborting) {
2434 const char *msg = "Unable to reset abort because no abort was requested";
2435 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2439 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2440 thread->abort_exc = NULL;
2441 if (thread->abort_state_handle) {
2442 mono_gchandle_free (thread->abort_state_handle);
2443 /* This is actually not necessary - the handle
2444 only counts if the exception is set */
2445 thread->abort_state_handle = 0;
2450 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2452 LOCK_THREAD (thread);
2454 thread->state &= ~ThreadState_AbortRequested;
2456 if (thread->abort_exc) {
2457 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2458 thread->abort_exc = NULL;
2459 if (thread->abort_state_handle) {
2460 mono_gchandle_free (thread->abort_state_handle);
2461 /* This is actually not necessary - the handle
2462 only counts if the exception is set */
2463 thread->abort_state_handle = 0;
2467 UNLOCK_THREAD (thread);
2471 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2474 MonoInternalThread *thread = this_obj->internal_thread;
2475 MonoObject *state, *deserialized = NULL;
2478 if (!thread->abort_state_handle)
2481 state = mono_gchandle_get_target (thread->abort_state_handle);
2484 domain = mono_domain_get ();
2485 if (mono_object_domain (state) == domain)
2488 deserialized = mono_object_xdomain_representation (state, domain, &error);
2490 if (!deserialized) {
2491 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2492 if (!is_ok (&error)) {
2493 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2494 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2496 mono_set_pending_exception (invalid_op_exc);
2500 return deserialized;
2504 mono_thread_suspend (MonoInternalThread *thread)
2506 LOCK_THREAD (thread);
2508 if ((thread->state & ThreadState_Unstarted) != 0 ||
2509 (thread->state & ThreadState_Aborted) != 0 ||
2510 (thread->state & ThreadState_Stopped) != 0)
2512 UNLOCK_THREAD (thread);
2516 if ((thread->state & ThreadState_Suspended) != 0 ||
2517 (thread->state & ThreadState_SuspendRequested) != 0 ||
2518 (thread->state & ThreadState_StopRequested) != 0)
2520 UNLOCK_THREAD (thread);
2524 thread->state |= ThreadState_SuspendRequested;
2525 mono_os_event_reset (thread->suspended);
2527 if (thread == mono_thread_internal_current ()) {
2528 /* calls UNLOCK_THREAD (thread) */
2529 self_suspend_internal ();
2531 /* calls UNLOCK_THREAD (thread) */
2532 async_suspend_internal (thread, FALSE);
2539 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2541 if (!mono_thread_suspend (this_obj->internal_thread)) {
2542 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2547 /* LOCKING: LOCK_THREAD(thread) must be held */
2549 mono_thread_resume (MonoInternalThread *thread)
2551 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2552 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2553 thread->state &= ~ThreadState_SuspendRequested;
2554 mono_os_event_set (thread->suspended);
2558 if ((thread->state & ThreadState_Suspended) == 0 ||
2559 (thread->state & ThreadState_Unstarted) != 0 ||
2560 (thread->state & ThreadState_Aborted) != 0 ||
2561 (thread->state & ThreadState_Stopped) != 0)
2563 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2567 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2569 mono_os_event_set (thread->suspended);
2571 if (!thread->self_suspended) {
2572 UNLOCK_THREAD (thread);
2574 /* Awake the thread */
2575 if (!mono_thread_info_resume (thread_get_tid (thread)))
2578 LOCK_THREAD (thread);
2581 thread->state &= ~ThreadState_Suspended;
2587 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2589 if (!thread->internal_thread) {
2590 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2592 LOCK_THREAD (thread->internal_thread);
2593 if (!mono_thread_resume (thread->internal_thread))
2594 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2595 UNLOCK_THREAD (thread->internal_thread);
2600 mono_threads_is_critical_method (MonoMethod *method)
2602 switch (method->wrapper_type) {
2603 case MONO_WRAPPER_RUNTIME_INVOKE:
2604 case MONO_WRAPPER_XDOMAIN_INVOKE:
2605 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2612 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2617 if (mono_threads_is_critical_method (m)) {
2618 *((gboolean*)data) = TRUE;
2625 is_running_protected_wrapper (void)
2627 gboolean found = FALSE;
2628 mono_stack_walk (find_wrapper, &found);
2633 request_thread_stop (MonoInternalThread *thread)
2635 LOCK_THREAD (thread);
2637 if ((thread->state & ThreadState_StopRequested) != 0 ||
2638 (thread->state & ThreadState_Stopped) != 0)
2640 UNLOCK_THREAD (thread);
2644 /* Make sure the thread is awake */
2645 mono_thread_resume (thread);
2647 thread->state |= ThreadState_StopRequested;
2648 thread->state &= ~ThreadState_AbortRequested;
2650 UNLOCK_THREAD (thread);
2655 * mono_thread_internal_stop:
2657 * Request thread @thread to stop.
2659 * @thread MUST NOT be the current thread.
2662 mono_thread_internal_stop (MonoInternalThread *thread)
2664 g_assert (thread != mono_thread_internal_current ());
2666 if (!request_thread_stop (thread))
2669 async_abort_internal (thread, TRUE);
2672 void mono_thread_stop (MonoThread *thread)
2674 MonoInternalThread *internal = thread->internal_thread;
2676 if (!request_thread_stop (internal))
2679 if (internal == mono_thread_internal_current ()) {
2681 self_abort_internal (&error);
2683 This function is part of the embeding API and has no way to return the exception
2684 to be thrown. So what we do is keep the old behavior and raise the exception.
2686 mono_error_raise_exception (&error); /* OK to throw, see note */
2688 async_abort_internal (internal, TRUE);
2693 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2695 gint8 tmp = *(volatile gint8 *)ptr;
2696 mono_memory_barrier ();
2701 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2703 gint16 tmp = *(volatile gint16 *)ptr;
2704 mono_memory_barrier ();
2709 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2711 gint32 tmp = *(volatile gint32 *)ptr;
2712 mono_memory_barrier ();
2717 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2719 gint64 tmp = *(volatile gint64 *)ptr;
2720 mono_memory_barrier ();
2725 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2727 volatile void *tmp = *(volatile void **)ptr;
2728 mono_memory_barrier ();
2729 return (void *) tmp;
2733 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2735 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2736 mono_memory_barrier ();
2737 return (MonoObject *) tmp;
2741 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2743 double tmp = *(volatile double *)ptr;
2744 mono_memory_barrier ();
2749 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2751 float tmp = *(volatile float *)ptr;
2752 mono_memory_barrier ();
2757 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2759 return InterlockedRead8 ((volatile gint8 *)ptr);
2763 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2765 return InterlockedRead16 ((volatile gint16 *)ptr);
2769 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2771 return InterlockedRead ((volatile gint32 *)ptr);
2775 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2777 #if SIZEOF_VOID_P == 4
2778 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2780 mono_interlocked_lock ();
2781 val = *(gint64*)ptr;
2782 mono_interlocked_unlock ();
2786 return InterlockedRead64 ((volatile gint64 *)ptr);
2790 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2792 return InterlockedReadPointer ((volatile gpointer *)ptr);
2796 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2800 #if SIZEOF_VOID_P == 4
2801 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2803 mono_interlocked_lock ();
2804 val = *(double*)ptr;
2805 mono_interlocked_unlock ();
2810 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2816 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2820 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2826 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2828 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2832 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2834 mono_memory_barrier ();
2835 *(volatile gint8 *)ptr = value;
2839 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2841 mono_memory_barrier ();
2842 *(volatile gint16 *)ptr = value;
2846 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2848 mono_memory_barrier ();
2849 *(volatile gint32 *)ptr = value;
2853 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2855 mono_memory_barrier ();
2856 *(volatile gint64 *)ptr = value;
2860 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2862 mono_memory_barrier ();
2863 *(volatile void **)ptr = value;
2867 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2869 mono_memory_barrier ();
2870 mono_gc_wbarrier_generic_store (ptr, value);
2874 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2876 mono_memory_barrier ();
2877 *(volatile double *)ptr = value;
2881 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2883 mono_memory_barrier ();
2884 *(volatile float *)ptr = value;
2888 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2890 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2894 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2896 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2900 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2902 InterlockedWrite ((volatile gint32 *)ptr, value);
2906 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2908 #if SIZEOF_VOID_P == 4
2909 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2910 mono_interlocked_lock ();
2911 *(gint64*)ptr = value;
2912 mono_interlocked_unlock ();
2917 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2921 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2923 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2927 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2931 #if SIZEOF_VOID_P == 4
2932 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2933 mono_interlocked_lock ();
2934 *(double*)ptr = value;
2935 mono_interlocked_unlock ();
2942 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2946 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2952 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2956 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2958 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2962 free_context (void *user_data)
2964 ContextStaticData *data = user_data;
2966 mono_threads_lock ();
2969 * There is no guarantee that, by the point this reference queue callback
2970 * has been invoked, the GC handle associated with the object will fail to
2971 * resolve as one might expect. So if we don't free and remove the GC
2972 * handle here, free_context_static_data_helper () could end up resolving
2973 * a GC handle to an actually-dead context which would contain a pointer
2974 * to an already-freed static data segment, resulting in a crash when
2977 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2979 mono_threads_unlock ();
2981 mono_gchandle_free (data->gc_handle);
2982 mono_free_static_data (data->static_data);
2987 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2989 mono_threads_lock ();
2991 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2994 contexts = g_hash_table_new (NULL, NULL);
2997 context_queue = mono_gc_reference_queue_new (free_context);
2999 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
3000 g_hash_table_insert (contexts, gch, gch);
3003 * We use this intermediate structure to contain a duplicate pointer to
3004 * the static data because we can't rely on being able to resolve the GC
3005 * handle in the reference queue callback.
3007 ContextStaticData *data = g_new0 (ContextStaticData, 1);
3008 data->gc_handle = GPOINTER_TO_UINT (gch);
3011 context_adjust_static_data (ctx);
3012 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
3014 mono_threads_unlock ();
3016 mono_profiler_context_loaded (ctx);
3020 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
3023 * NOTE: Since finalizers are unreliable for the purposes of ensuring
3024 * cleanup in exceptional circumstances, we don't actually do any
3025 * cleanup work here. We instead do this via a reference queue.
3028 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
3030 mono_profiler_context_unloaded (ctx);
3033 void mono_thread_init (MonoThreadStartCB start_cb,
3034 MonoThreadAttachCB attach_cb)
3036 mono_coop_mutex_init_recursive (&threads_mutex);
3038 mono_os_mutex_init_recursive(&interlocked_mutex);
3039 mono_os_mutex_init_recursive(&joinable_threads_mutex);
3041 mono_os_event_init (&background_change_event, FALSE);
3043 mono_init_static_data_info (&thread_static_info);
3044 mono_init_static_data_info (&context_static_info);
3046 mono_thread_start_cb = start_cb;
3047 mono_thread_attach_cb = attach_cb;
3050 void mono_thread_cleanup (void)
3052 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3053 /* The main thread must abandon any held mutexes (particularly
3054 * important for named mutexes as they are shared across
3055 * processes, see bug 74680.) This will happen when the
3056 * thread exits, but if it's not running in a subthread it
3057 * won't exit in time.
3059 mono_w32mutex_abandon ();
3063 /* This stuff needs more testing, it seems one of these
3064 * critical sections can be locked when mono_thread_cleanup is
3067 mono_coop_mutex_destroy (&threads_mutex);
3068 mono_os_mutex_destroy (&interlocked_mutex);
3069 mono_os_mutex_destroy (&delayed_free_table_mutex);
3070 mono_os_mutex_destroy (&small_id_mutex);
3071 mono_os_event_destroy (&background_change_event);
3076 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3078 mono_thread_cleanup_fn = func;
3082 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3084 thread->internal_thread->manage_callback = func;
3088 static void print_tids (gpointer key, gpointer value, gpointer user)
3090 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3091 * sizeof(uint) and a cast to uint would overflow
3093 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3094 * print this as a pointer.
3096 g_message ("Waiting for: %p", key);
3101 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3102 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3107 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3110 MonoThreadInfoWaitRet ret;
3112 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3114 /* Add the thread state change event, so it wakes
3115 * up if a thread changes to background mode. */
3118 if (check_state_change)
3119 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3121 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3124 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3125 /* See the comment in build_wait_tids() */
3126 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3130 for( i = 0; i < wait->num; i++)
3131 mono_threads_close_thread_handle (wait->handles [i]);
3133 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3136 if (ret < wait->num) {
3137 MonoInternalThread *internal;
3139 internal = wait->threads [ret];
3141 mono_threads_lock ();
3142 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3143 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3144 mono_threads_unlock ();
3148 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3150 struct wait_data *wait=(struct wait_data *)user;
3152 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3153 MonoInternalThread *thread=(MonoInternalThread *)value;
3155 /* Ignore background threads, we abort them later */
3156 /* Do not lock here since it is not needed and the caller holds threads_lock */
3157 if (thread->state & ThreadState_Background) {
3158 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3159 return; /* just leave, ignore */
3162 if (mono_gc_is_finalizer_internal_thread (thread)) {
3163 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3167 if (thread == mono_thread_internal_current ()) {
3168 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3172 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3173 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3177 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3178 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3182 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3183 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3184 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3185 wait->threads[wait->num]=thread;
3188 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3190 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3195 /* Just ignore the rest, we can't do anything with
3202 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3204 struct wait_data *wait=(struct wait_data *)user;
3205 MonoNativeThreadId self = mono_native_thread_id_get ();
3206 MonoInternalThread *thread = (MonoInternalThread *)value;
3208 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3211 /* The finalizer thread is not a background thread */
3212 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3213 && (thread->state & ThreadState_Background) != 0
3214 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3216 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3217 wait->threads[wait->num] = thread;
3220 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3221 mono_thread_internal_abort (thread);
3225 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3226 && !mono_gc_is_finalizer_internal_thread (thread);
3230 * mono_threads_set_shutting_down:
3232 * Is called by a thread that wants to shut down Mono. If the runtime is already
3233 * shutting down, the calling thread is suspended/stopped, and this function never
3237 mono_threads_set_shutting_down (void)
3239 MonoInternalThread *current_thread = mono_thread_internal_current ();
3241 mono_threads_lock ();
3243 if (shutting_down) {
3244 mono_threads_unlock ();
3246 /* Make sure we're properly suspended/stopped */
3248 LOCK_THREAD (current_thread);
3250 if ((current_thread->state & ThreadState_SuspendRequested) ||
3251 (current_thread->state & ThreadState_AbortRequested) ||
3252 (current_thread->state & ThreadState_StopRequested)) {
3253 UNLOCK_THREAD (current_thread);
3254 mono_thread_execute_interruption ();
3256 current_thread->state |= ThreadState_Stopped;
3257 UNLOCK_THREAD (current_thread);
3260 /*since we're killing the thread, detach it.*/
3261 mono_thread_detach_internal (current_thread);
3263 /* Wake up other threads potentially waiting for us */
3264 mono_thread_info_exit (0);
3266 shutting_down = TRUE;
3268 /* Not really a background state change, but this will
3269 * interrupt the main thread if it is waiting for all
3270 * the other threads.
3272 mono_os_event_set (&background_change_event);
3274 mono_threads_unlock ();
3278 void mono_thread_manage (void)
3280 struct wait_data wait_data;
3281 struct wait_data *wait = &wait_data;
3283 memset (wait, 0, sizeof (struct wait_data));
3284 /* join each thread that's still running */
3285 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3287 mono_threads_lock ();
3289 THREAD_DEBUG (g_message("%s: No threads", __func__));
3290 mono_threads_unlock ();
3293 mono_threads_unlock ();
3296 mono_threads_lock ();
3297 if (shutting_down) {
3298 /* somebody else is shutting down */
3299 mono_threads_unlock ();
3302 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3303 mono_g_hash_table_foreach (threads, print_tids, NULL));
3305 mono_os_event_reset (&background_change_event);
3307 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3308 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3309 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3310 mono_threads_unlock ();
3312 /* Something to wait for */
3313 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3314 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3315 } while(wait->num>0);
3317 /* Mono is shutting down, so just wait for the end */
3318 if (!mono_runtime_try_shutdown ()) {
3319 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3320 mono_thread_suspend (mono_thread_internal_current ());
3321 mono_thread_execute_interruption ();
3325 * Remove everything but the finalizer thread and self.
3326 * Also abort all the background threads
3329 mono_threads_lock ();
3332 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3333 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3334 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3336 mono_threads_unlock ();
3338 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3339 if (wait->num > 0) {
3340 /* Something to wait for */
3341 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3343 } while (wait->num > 0);
3346 * give the subthreads a chance to really quit (this is mainly needed
3347 * to get correct user and system times from getrusage/wait/time(1)).
3348 * This could be removed if we avoid pthread_detach() and use pthread_join().
3350 mono_thread_info_yield ();
3354 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3356 MonoInternalThread *thread = (MonoInternalThread*)value;
3357 struct wait_data *wait = (struct wait_data*)user_data;
3360 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3362 * This needs no locking.
3364 if ((thread->state & ThreadState_Suspended) != 0 ||
3365 (thread->state & ThreadState_Stopped) != 0)
3368 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3369 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3370 wait->threads [wait->num] = thread;
3376 * mono_thread_suspend_all_other_threads:
3378 * Suspend all managed threads except the finalizer thread and this thread. It is
3379 * not possible to resume them later.
3381 void mono_thread_suspend_all_other_threads (void)
3383 struct wait_data wait_data;
3384 struct wait_data *wait = &wait_data;
3386 MonoNativeThreadId self = mono_native_thread_id_get ();
3387 guint32 eventidx = 0;
3388 gboolean starting, finished;
3390 memset (wait, 0, sizeof (struct wait_data));
3392 * The other threads could be in an arbitrary state at this point, i.e.
3393 * they could be starting up, shutting down etc. This means that there could be
3394 * threads which are not even in the threads hash table yet.
3398 * First we set a barrier which will be checked by all threads before they
3399 * are added to the threads hash table, and they will exit if the flag is set.
3400 * This ensures that no threads could be added to the hash later.
3401 * We will use shutting_down as the barrier for now.
3403 g_assert (shutting_down);
3406 * We make multiple calls to WaitForMultipleObjects since:
3407 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3408 * - some threads could exit without becoming suspended
3413 * Make a copy of the hashtable since we can't do anything with
3414 * threads while threads_mutex is held.
3417 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3418 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3419 mono_threads_lock ();
3420 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3421 mono_threads_unlock ();
3424 /* Get the suspended events that we'll be waiting for */
3425 for (i = 0; i < wait->num; ++i) {
3426 MonoInternalThread *thread = wait->threads [i];
3428 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3429 || mono_gc_is_finalizer_internal_thread (thread)
3430 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3432 mono_threads_close_thread_handle (wait->handles [i]);
3433 wait->threads [i] = NULL;
3437 LOCK_THREAD (thread);
3439 if ((thread->state & ThreadState_Suspended) != 0 ||
3440 (thread->state & ThreadState_StopRequested) != 0 ||
3441 (thread->state & ThreadState_Stopped) != 0) {
3442 UNLOCK_THREAD (thread);
3443 mono_threads_close_thread_handle (wait->handles [i]);
3444 wait->threads [i] = NULL;
3450 /* Convert abort requests into suspend requests */
3451 if ((thread->state & ThreadState_AbortRequested) != 0)
3452 thread->state &= ~ThreadState_AbortRequested;
3454 thread->state |= ThreadState_SuspendRequested;
3455 mono_os_event_reset (thread->suspended);
3457 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3458 async_suspend_internal (thread, TRUE);
3460 mono_threads_close_thread_handle (wait->handles [i]);
3461 wait->threads [i] = NULL;
3463 if (eventidx <= 0) {
3465 * If there are threads which are starting up, we wait until they
3466 * are suspended when they try to register in the threads hash.
3467 * This is guaranteed to finish, since the threads which can create new
3468 * threads get suspended after a while.
3469 * FIXME: The finalizer thread can still create new threads.
3471 mono_threads_lock ();
3472 if (threads_starting_up)
3473 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3476 mono_threads_unlock ();
3478 mono_thread_info_sleep (100, NULL);
3486 MonoInternalThread *thread;
3487 MonoStackFrameInfo *frames;
3488 int nframes, max_frames;
3489 int nthreads, max_threads;
3490 MonoInternalThread **threads;
3491 } ThreadDumpUserData;
3493 static gboolean thread_dump_requested;
3495 /* This needs to be async safe */
3497 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3499 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3501 if (ud->nframes < ud->max_frames) {
3502 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3509 /* This needs to be async safe */
3510 static SuspendThreadResult
3511 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3513 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3514 MonoInternalThread *thread = user_data->thread;
3517 /* This no longer works with remote unwinding */
3518 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3519 mono_thread_internal_describe (thread, text);
3520 g_string_append (text, "\n");
3523 if (thread == mono_thread_internal_current ())
3524 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3526 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3528 return MonoResumeThread;
3532 int nthreads, max_threads;
3533 MonoInternalThread **threads;
3534 } CollectThreadsUserData;
3537 collect_thread (gpointer key, gpointer value, gpointer user)
3539 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3540 MonoInternalThread *thread = (MonoInternalThread *)value;
3542 if (ud->nthreads < ud->max_threads)
3543 ud->threads [ud->nthreads ++] = thread;
3547 * Collect running threads into the THREADS array.
3548 * THREADS should be an array allocated on the stack.
3551 collect_threads (MonoInternalThread **thread_array, int max_threads)
3553 CollectThreadsUserData ud;
3555 memset (&ud, 0, sizeof (ud));
3556 /* This array contains refs, but its on the stack, so its ok */
3557 ud.threads = thread_array;
3558 ud.max_threads = max_threads;
3560 mono_threads_lock ();
3561 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3562 mono_threads_unlock ();
3568 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3570 GString* text = g_string_new (0);
3572 GError *error = NULL;
3575 ud->thread = thread;
3578 /* Collect frames for the thread */
3579 if (thread == mono_thread_internal_current ()) {
3580 get_thread_dump (mono_thread_info_current (), ud);
3582 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3586 * Do all the non async-safe work outside of get_thread_dump.
3589 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3591 g_string_append_printf (text, "\n\"%s\"", name);
3594 else if (thread->threadpool_thread) {
3595 g_string_append (text, "\n\"<threadpool thread>\"");
3597 g_string_append (text, "\n\"<unnamed thread>\"");
3600 for (i = 0; i < ud->nframes; ++i) {
3601 MonoStackFrameInfo *frame = &ud->frames [i];
3602 MonoMethod *method = NULL;
3604 if (frame->type == FRAME_TYPE_MANAGED)
3605 method = mono_jit_info_get_method (frame->ji);
3608 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3609 g_string_append_printf (text, " %s\n", location);
3612 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3616 fprintf (stdout, "%s", text->str);
3618 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3619 OutputDebugStringA(text->str);
3622 g_string_free (text, TRUE);
3627 mono_threads_perform_thread_dump (void)
3629 ThreadDumpUserData ud;
3630 MonoInternalThread *thread_array [128];
3631 int tindex, nthreads;
3633 if (!thread_dump_requested)
3636 printf ("Full thread dump:\n");
3638 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3639 nthreads = collect_threads (thread_array, 128);
3641 memset (&ud, 0, sizeof (ud));
3642 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3643 ud.max_frames = 256;
3645 for (tindex = 0; tindex < nthreads; ++tindex)
3646 dump_thread (thread_array [tindex], &ud);
3650 thread_dump_requested = FALSE;
3653 /* Obtain the thread dump of all threads */
3655 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3658 ThreadDumpUserData ud;
3659 MonoInternalThread *thread_array [128];
3660 MonoDomain *domain = mono_domain_get ();
3661 MonoDebugSourceLocation *location;
3662 int tindex, nthreads;
3664 mono_error_init (error);
3666 *out_threads = NULL;
3667 *out_stack_frames = NULL;
3669 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3670 nthreads = collect_threads (thread_array, 128);
3672 memset (&ud, 0, sizeof (ud));
3673 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3674 ud.max_frames = 256;
3676 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3679 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3683 for (tindex = 0; tindex < nthreads; ++tindex) {
3684 MonoInternalThread *thread = thread_array [tindex];
3685 MonoArray *thread_frames;
3691 /* Collect frames for the thread */
3692 if (thread == mono_thread_internal_current ()) {
3693 get_thread_dump (mono_thread_info_current (), &ud);
3695 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3698 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3700 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3703 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3705 for (i = 0; i < ud.nframes; ++i) {
3706 MonoStackFrameInfo *frame = &ud.frames [i];
3707 MonoMethod *method = NULL;
3708 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3712 sf->native_offset = frame->native_offset;
3714 if (frame->type == FRAME_TYPE_MANAGED)
3715 method = mono_jit_info_get_method (frame->ji);
3718 sf->method_address = (gsize) frame->ji->code_start;
3720 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3723 MONO_OBJECT_SETREF (sf, method, rm);
3725 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3727 sf->il_offset = location->il_offset;
3729 if (location && location->source_file) {
3730 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3731 sf->line = location->row;
3732 sf->column = location->column;
3734 mono_debug_free_source_location (location);
3739 mono_array_setref (thread_frames, i, sf);
3745 return is_ok (error);
3749 * mono_threads_request_thread_dump:
3751 * Ask all threads except the current to print their stacktrace to stdout.
3754 mono_threads_request_thread_dump (void)
3756 /*The new thread dump code runs out of the finalizer thread. */
3757 thread_dump_requested = TRUE;
3758 mono_gc_finalize_notify ();
3763 gint allocated; /* +1 so that refs [allocated] == NULL */
3767 typedef struct ref_stack RefStack;
3770 ref_stack_new (gint initial_size)
3774 initial_size = MAX (initial_size, 16) + 1;
3775 rs = g_new0 (RefStack, 1);
3776 rs->refs = g_new0 (gpointer, initial_size);
3777 rs->allocated = initial_size;
3782 ref_stack_destroy (gpointer ptr)
3784 RefStack *rs = (RefStack *)ptr;
3793 ref_stack_push (RefStack *rs, gpointer ptr)
3795 g_assert (rs != NULL);
3797 if (rs->bottom >= rs->allocated) {
3798 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3799 rs->allocated <<= 1;
3800 rs->refs [rs->allocated] = NULL;
3802 rs->refs [rs->bottom++] = ptr;
3806 ref_stack_pop (RefStack *rs)
3808 if (rs == NULL || rs->bottom == 0)
3812 rs->refs [rs->bottom] = NULL;
3816 ref_stack_find (RefStack *rs, gpointer ptr)
3823 for (refs = rs->refs; refs && *refs; refs++) {
3831 * mono_thread_push_appdomain_ref:
3833 * Register that the current thread may have references to objects in domain
3834 * @domain on its stack. Each call to this function should be paired with a
3835 * call to pop_appdomain_ref.
3838 mono_thread_push_appdomain_ref (MonoDomain *domain)
3840 MonoInternalThread *thread = mono_thread_internal_current ();
3843 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3844 SPIN_LOCK (thread->lock_thread_id);
3845 if (thread->appdomain_refs == NULL)
3846 thread->appdomain_refs = ref_stack_new (16);
3847 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3848 SPIN_UNLOCK (thread->lock_thread_id);
3853 mono_thread_pop_appdomain_ref (void)
3855 MonoInternalThread *thread = mono_thread_internal_current ();
3858 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3859 SPIN_LOCK (thread->lock_thread_id);
3860 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3861 SPIN_UNLOCK (thread->lock_thread_id);
3866 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3869 SPIN_LOCK (thread->lock_thread_id);
3870 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3871 SPIN_UNLOCK (thread->lock_thread_id);
3876 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3878 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3881 typedef struct abort_appdomain_data {
3882 struct wait_data wait;
3884 } abort_appdomain_data;
3887 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3889 MonoInternalThread *thread = (MonoInternalThread*)value;
3890 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3891 MonoDomain *domain = data->domain;
3893 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3894 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3896 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3897 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3898 data->wait.threads [data->wait.num] = thread;
3901 /* Just ignore the rest, we can't do anything with
3909 * mono_threads_abort_appdomain_threads:
3911 * Abort threads which has references to the given appdomain.
3914 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3916 #ifdef __native_client__
3920 abort_appdomain_data user_data;
3922 int orig_timeout = timeout;
3925 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3927 start_time = mono_msec_ticks ();
3929 mono_threads_lock ();
3931 user_data.domain = domain;
3932 user_data.wait.num = 0;
3933 /* This shouldn't take any locks */
3934 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3935 mono_threads_unlock ();
3937 if (user_data.wait.num > 0) {
3938 /* Abort the threads outside the threads lock */
3939 for (i = 0; i < user_data.wait.num; ++i)
3940 mono_thread_internal_abort (user_data.wait.threads [i]);
3943 * We should wait for the threads either to abort, or to leave the
3944 * domain. We can't do the latter, so we wait with a timeout.
3946 wait_for_tids (&user_data.wait, 100, FALSE);
3949 /* Update remaining time */
3950 timeout -= mono_msec_ticks () - start_time;
3951 start_time = mono_msec_ticks ();
3953 if (orig_timeout != -1 && timeout < 0)
3956 while (user_data.wait.num > 0);
3958 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3964 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3966 MonoInternalThread *thread = (MonoInternalThread*)value;
3967 MonoDomain *domain = (MonoDomain*)user_data;
3970 /* No locking needed here */
3971 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3973 if (thread->cached_culture_info) {
3974 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3975 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3976 if (obj && obj->vtable->domain == domain)
3977 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3983 * mono_threads_clear_cached_culture:
3985 * Clear the cached_current_culture from all threads if it is in the
3989 mono_threads_clear_cached_culture (MonoDomain *domain)
3991 mono_threads_lock ();
3992 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3993 mono_threads_unlock ();
3997 * mono_thread_get_undeniable_exception:
3999 * Return an exception which needs to be raised when leaving a catch clause.
4000 * This is used for undeniable exception propagation.
4003 mono_thread_get_undeniable_exception (void)
4005 MonoInternalThread *thread = mono_thread_internal_current ();
4007 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
4010 // We don't want to have our exception effect calls made by
4011 // the catching block
4013 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
4017 * FIXME: Clear the abort exception and return an AppDomainUnloaded
4018 * exception if the thread no longer references a dying appdomain.
4020 thread->abort_exc->trace_ips = NULL;
4021 thread->abort_exc->stack_trace = NULL;
4022 return thread->abort_exc;
4025 #if MONO_SMALL_CONFIG
4026 #define NUM_STATIC_DATA_IDX 4
4027 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4031 #define NUM_STATIC_DATA_IDX 8
4032 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4033 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
4037 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4038 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4041 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4043 gpointer *static_data = (gpointer *)addr;
4045 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4046 void **ptr = (void **)static_data [i];
4051 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4052 void **p = ptr + idx;
4055 mark_func ((MonoObject**)p, gc_data);
4061 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4063 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4067 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4069 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4073 * mono_alloc_static_data
4075 * Allocate memory blocks for storing threads or context static data
4078 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4080 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4083 gpointer* static_data = *static_data_ptr;
4085 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4086 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4088 if (mono_gc_user_markers_supported ()) {
4089 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4090 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4092 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4093 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4096 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4097 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4098 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4099 *static_data_ptr = static_data;
4100 static_data [0] = static_data;
4103 for (i = 1; i <= idx; ++i) {
4104 if (static_data [i])
4107 if (mono_gc_user_markers_supported ())
4108 static_data [i] = g_malloc0 (static_data_size [i]);
4110 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4111 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4112 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4117 mono_free_static_data (gpointer* static_data)
4120 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4121 gpointer p = static_data [i];
4125 * At this point, the static data pointer array is still registered with the
4126 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4127 * data. Freeing the individual arrays without first nulling their slots
4128 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4129 * such an already freed array. See bug #13813.
4131 static_data [i] = NULL;
4132 mono_memory_write_barrier ();
4133 if (mono_gc_user_markers_supported ())
4136 mono_gc_free_fixed (p);
4138 mono_gc_free_fixed (static_data);
4142 * mono_init_static_data_info
4144 * Initializes static data counters
4146 static void mono_init_static_data_info (StaticDataInfo *static_data)
4148 static_data->idx = 0;
4149 static_data->offset = 0;
4150 static_data->freelist = NULL;
4154 * mono_alloc_static_data_slot
4156 * Generates an offset for static data. static_data contains the counters
4157 * used to generate it.
4160 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4162 if (!static_data->idx && !static_data->offset) {
4164 * we use the first chunk of the first allocation also as
4165 * an array for the rest of the data
4167 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4169 static_data->offset += align - 1;
4170 static_data->offset &= ~(align - 1);
4171 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4172 static_data->idx ++;
4173 g_assert (size <= static_data_size [static_data->idx]);
4174 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4175 static_data->offset = 0;
4177 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4178 static_data->offset += size;
4183 * LOCKING: requires that threads_mutex is held
4186 context_adjust_static_data (MonoAppContext *ctx)
4188 if (context_static_info.offset || context_static_info.idx > 0) {
4189 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4190 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4191 ctx->data->static_data = ctx->static_data;
4196 * LOCKING: requires that threads_mutex is held
4199 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4201 MonoInternalThread *thread = (MonoInternalThread *)value;
4202 guint32 offset = GPOINTER_TO_UINT (user);
4204 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4208 * LOCKING: requires that threads_mutex is held
4211 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4213 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4218 guint32 offset = GPOINTER_TO_UINT (user);
4219 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4220 ctx->data->static_data = ctx->static_data;
4223 static StaticDataFreeList*
4224 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4226 StaticDataFreeList* prev = NULL;
4227 StaticDataFreeList* tmp = static_data->freelist;
4229 if (tmp->size == size) {
4231 prev->next = tmp->next;
4233 static_data->freelist = tmp->next;
4242 #if SIZEOF_VOID_P == 4
4249 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4251 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4253 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4254 MonoBitSet *rb = sets [idx];
4255 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4256 offset /= sizeof (uintptr_t);
4257 /* offset is now the bitmap offset */
4258 for (int i = 0; i < numbits; ++i) {
4259 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4260 mono_bitset_set_fast (rb, offset + i);
4265 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4267 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4268 MonoBitSet *rb = sets [idx];
4269 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4270 offset /= sizeof (uintptr_t);
4271 /* offset is now the bitmap offset */
4272 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4273 mono_bitset_clear_fast (rb, offset + i);
4277 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4279 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4281 StaticDataInfo *info;
4284 if (static_type == SPECIAL_STATIC_THREAD) {
4285 info = &thread_static_info;
4286 sets = thread_reference_bitmaps;
4288 info = &context_static_info;
4289 sets = context_reference_bitmaps;
4292 mono_threads_lock ();
4294 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4298 offset = item->offset;
4301 offset = mono_alloc_static_data_slot (info, size, align);
4304 update_reference_bitmap (sets, offset, bitmap, numbits);
4306 if (static_type == SPECIAL_STATIC_THREAD) {
4307 /* This can be called during startup */
4308 if (threads != NULL)
4309 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4311 if (contexts != NULL)
4312 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4314 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4317 mono_threads_unlock ();
4323 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4325 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4327 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4328 return get_thread_static_data (thread, offset);
4330 return get_context_static_data (thread->current_appcontext, offset);
4335 mono_get_special_static_data (guint32 offset)
4337 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4346 * LOCKING: requires that threads_mutex is held
4349 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4351 MonoInternalThread *thread = (MonoInternalThread *)value;
4352 OffsetSize *data = (OffsetSize *)user;
4353 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4354 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4357 if (!thread->static_data || !thread->static_data [idx])
4359 ptr = ((char*) thread->static_data [idx]) + off;
4360 mono_gc_bzero_atomic (ptr, data->size);
4364 * LOCKING: requires that threads_mutex is held
4367 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4369 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4374 OffsetSize *data = (OffsetSize *)user;
4375 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4376 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4379 if (!ctx->static_data || !ctx->static_data [idx])
4382 ptr = ((char*) ctx->static_data [idx]) + off;
4383 mono_gc_bzero_atomic (ptr, data->size);
4387 do_free_special_slot (guint32 offset, guint32 size)
4389 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4391 StaticDataInfo *info;
4393 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4394 info = &thread_static_info;
4395 sets = thread_reference_bitmaps;
4397 info = &context_static_info;
4398 sets = context_reference_bitmaps;
4401 guint32 data_offset = offset;
4402 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4403 OffsetSize data = { data_offset, size };
4405 clear_reference_bitmap (sets, data.offset, data.size);
4407 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4408 if (threads != NULL)
4409 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4411 if (contexts != NULL)
4412 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4415 if (!mono_runtime_is_shutting_down ()) {
4416 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4418 item->offset = offset;
4421 item->next = info->freelist;
4422 info->freelist = item;
4427 do_free_special (gpointer key, gpointer value, gpointer data)
4429 MonoClassField *field = (MonoClassField *)key;
4430 guint32 offset = GPOINTER_TO_UINT (value);
4433 size = mono_type_size (field->type, &align);
4434 do_free_special_slot (offset, size);
4438 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4440 mono_threads_lock ();
4442 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4444 mono_threads_unlock ();
4448 static void CALLBACK dummy_apc (ULONG_PTR param)
4454 * mono_thread_execute_interruption
4456 * Performs the operation that the requested thread state requires (abort,
4459 static MonoException*
4460 mono_thread_execute_interruption (void)
4462 MonoInternalThread *thread = mono_thread_internal_current ();
4463 MonoThread *sys_thread = mono_thread_current ();
4465 LOCK_THREAD (thread);
4467 /* MonoThread::interruption_requested can only be changed with atomics */
4468 if (mono_thread_clear_interruption_requested (thread)) {
4469 /* this will consume pending APC calls */
4471 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4473 InterlockedDecrement (&thread_interruption_requested);
4475 /* Clear the interrupted flag of the thread so it can wait again */
4476 mono_thread_info_clear_self_interrupt ();
4479 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4480 if (sys_thread->pending_exception) {
4483 exc = sys_thread->pending_exception;
4484 sys_thread->pending_exception = NULL;
4486 UNLOCK_THREAD (thread);
4488 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4489 UNLOCK_THREAD (thread);
4490 g_assert (sys_thread->pending_exception == NULL);
4491 if (thread->abort_exc == NULL) {
4493 * This might be racy, but it has to be called outside the lock
4494 * since it calls managed code.
4496 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4498 return thread->abort_exc;
4500 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4501 /* calls UNLOCK_THREAD (thread) */
4502 self_suspend_internal ();
4505 else if ((thread->state & ThreadState_StopRequested) != 0) {
4506 /* FIXME: do this through the JIT? */
4508 UNLOCK_THREAD (thread);
4510 mono_thread_exit ();
4512 } else if (thread->thread_interrupt_requested) {
4514 thread->thread_interrupt_requested = FALSE;
4515 UNLOCK_THREAD (thread);
4517 return(mono_get_exception_thread_interrupted ());
4520 UNLOCK_THREAD (thread);
4526 * mono_thread_request_interruption
4528 * A signal handler can call this method to request the interruption of a
4529 * thread. The result of the interruption will depend on the current state of
4530 * the thread. If the result is an exception that needs to be throw, it is
4531 * provided as return value.
4534 mono_thread_request_interruption (gboolean running_managed)
4536 MonoInternalThread *thread = mono_thread_internal_current ();
4538 /* The thread may already be stopping */
4543 if (thread->interrupt_on_stop &&
4544 thread->state & ThreadState_StopRequested &&
4545 thread->state & ThreadState_Background)
4548 if (!mono_thread_set_interruption_requested (thread))
4550 InterlockedIncrement (&thread_interruption_requested);
4552 if (!running_managed || is_running_protected_wrapper ()) {
4553 /* Can't stop while in unmanaged code. Increase the global interruption
4554 request count. When exiting the unmanaged method the count will be
4555 checked and the thread will be interrupted. */
4557 /* this will awake the thread if it is in WaitForSingleObject
4559 /* Our implementation of this function ignores the func argument */
4561 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4563 mono_thread_info_self_interrupt ();
4568 return mono_thread_execute_interruption ();
4572 /*This function should be called by a thread after it has exited all of
4573 * its handle blocks at interruption time.*/
4575 mono_thread_resume_interruption (void)
4577 MonoInternalThread *thread = mono_thread_internal_current ();
4578 gboolean still_aborting;
4580 /* The thread may already be stopping */
4584 LOCK_THREAD (thread);
4585 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4586 UNLOCK_THREAD (thread);
4588 /*This can happen if the protected block called Thread::ResetAbort*/
4589 if (!still_aborting)
4592 if (!mono_thread_set_interruption_requested (thread))
4594 InterlockedIncrement (&thread_interruption_requested);
4596 mono_thread_info_self_interrupt ();
4598 return mono_thread_execute_interruption ();
4601 gboolean mono_thread_interruption_requested ()
4603 if (thread_interruption_requested) {
4604 MonoInternalThread *thread = mono_thread_internal_current ();
4605 /* The thread may already be stopping */
4607 return mono_thread_get_interruption_requested (thread);
4612 static MonoException*
4613 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4615 MonoInternalThread *thread = mono_thread_internal_current ();
4617 /* The thread may already be stopping */
4620 if (!mono_thread_get_interruption_requested (thread))
4622 if (!bypass_abort_protection && is_running_protected_wrapper ())
4625 return mono_thread_execute_interruption ();
4629 * Performs the interruption of the current thread, if one has been requested,
4630 * and the thread is not running a protected wrapper.
4631 * Return the exception which needs to be thrown, if any.
4634 mono_thread_interruption_checkpoint (void)
4636 return mono_thread_interruption_checkpoint_request (FALSE);
4640 * Performs the interruption of the current thread, if one has been requested.
4641 * Return the exception which needs to be thrown, if any.
4644 mono_thread_force_interruption_checkpoint_noraise (void)
4646 return mono_thread_interruption_checkpoint_request (TRUE);
4650 * mono_set_pending_exception:
4652 * Set the pending exception of the current thread to EXC.
4653 * The exception will be thrown when execution returns to managed code.
4656 mono_set_pending_exception (MonoException *exc)
4658 MonoThread *thread = mono_thread_current ();
4660 /* The thread may already be stopping */
4664 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4666 mono_thread_request_interruption (FALSE);
4670 * mono_thread_interruption_request_flag:
4672 * Returns the address of a flag that will be non-zero if an interruption has
4673 * been requested for a thread. The thread to interrupt may not be the current
4674 * thread, so an additional call to mono_thread_interruption_requested() or
4675 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4678 gint32* mono_thread_interruption_request_flag ()
4680 return &thread_interruption_requested;
4684 mono_thread_init_apartment_state (void)
4687 MonoInternalThread* thread = mono_thread_internal_current ();
4689 /* Positive return value indicates success, either
4690 * S_OK if this is first CoInitialize call, or
4691 * S_FALSE if CoInitialize already called, but with same
4692 * threading model. A negative value indicates failure,
4693 * probably due to trying to change the threading model.
4695 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4696 ? COINIT_APARTMENTTHREADED
4697 : COINIT_MULTITHREADED) < 0) {
4698 thread->apartment_state = ThreadApartmentState_Unknown;
4704 mono_thread_cleanup_apartment_state (void)
4707 MonoInternalThread* thread = mono_thread_internal_current ();
4709 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4716 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4718 LOCK_THREAD (thread);
4719 thread->state |= state;
4720 UNLOCK_THREAD (thread);
4724 * mono_thread_test_and_set_state:
4726 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4728 * Returns TRUE is @set was OR'd in.
4731 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4733 LOCK_THREAD (thread);
4735 if ((thread->state & test) != 0) {
4736 UNLOCK_THREAD (thread);
4740 thread->state |= set;
4741 UNLOCK_THREAD (thread);
4747 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4749 LOCK_THREAD (thread);
4750 thread->state &= ~state;
4751 UNLOCK_THREAD (thread);
4755 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4757 gboolean ret = FALSE;
4759 LOCK_THREAD (thread);
4761 if ((thread->state & test) != 0) {
4765 UNLOCK_THREAD (thread);
4771 self_interrupt_thread (void *_unused)
4774 MonoThreadInfo *info;
4776 exc = mono_thread_execute_interruption ();
4778 if (mono_threads_is_coop_enabled ()) {
4779 /* We can return from an async call in coop, as
4780 * it's simply called when exiting the safepoint */
4784 g_error ("%s: we can't resume from an async call", __func__);
4787 info = mono_thread_info_current ();
4789 /* We must use _with_context since we didn't trampoline into the runtime */
4790 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. */
4794 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4798 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4802 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4804 MonoJitInfo **dest = (MonoJitInfo **)data;
4810 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4812 MonoJitInfo *ji = NULL;
4817 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4818 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4819 * where we hold runtime locks.
4821 if (!mono_threads_is_coop_enabled ())
4822 mono_thread_info_set_is_async_context (TRUE);
4823 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4824 if (!mono_threads_is_coop_enabled ())
4825 mono_thread_info_set_is_async_context (FALSE);
4830 MonoInternalThread *thread;
4831 gboolean install_async_abort;
4832 MonoThreadInfoInterruptToken *interrupt_token;
4835 static SuspendThreadResult
4836 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4838 AbortThreadData *data = (AbortThreadData *)ud;
4839 MonoInternalThread *thread = data->thread;
4840 MonoJitInfo *ji = NULL;
4841 gboolean protected_wrapper;
4842 gboolean running_managed;
4844 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4845 return MonoResumeThread;
4848 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4849 The protected block code will give them a chance when appropriate.
4851 if (mono_thread_get_abort_prot_block_count (thread) > 0)
4852 return MonoResumeThread;
4854 /*someone is already interrupting it*/
4855 if (!mono_thread_set_interruption_requested (thread))
4856 return MonoResumeThread;
4858 InterlockedIncrement (&thread_interruption_requested);
4860 ji = mono_thread_info_get_last_managed (info);
4861 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4862 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4864 if (!protected_wrapper && running_managed) {
4865 /*We are in managed code*/
4866 /*Set the thread to call */
4867 if (data->install_async_abort)
4868 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4869 return MonoResumeThread;
4872 * This will cause waits to be broken.
4873 * It will also prevent the thread from entering a wait, so if the thread returns
4874 * from the wait before it receives the abort signal, it will just spin in the wait
4875 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4878 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4880 return MonoResumeThread;
4885 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4887 AbortThreadData data;
4889 g_assert (thread != mono_thread_internal_current ());
4891 data.thread = thread;
4892 data.install_async_abort = install_async_abort;
4893 data.interrupt_token = NULL;
4895 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4896 if (data.interrupt_token)
4897 mono_thread_info_finish_interrupt (data.interrupt_token);
4898 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4902 self_abort_internal (MonoError *error)
4906 mono_error_init (error);
4908 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4909 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4912 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.
4914 exc = mono_thread_request_interruption (TRUE);
4916 mono_error_set_exception_instance (error, exc);
4918 mono_thread_info_self_interrupt ();
4922 MonoInternalThread *thread;
4924 MonoThreadInfoInterruptToken *interrupt_token;
4925 } SuspendThreadData;
4927 static SuspendThreadResult
4928 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4930 SuspendThreadData *data = (SuspendThreadData *)ud;
4931 MonoInternalThread *thread = data->thread;
4932 MonoJitInfo *ji = NULL;
4933 gboolean protected_wrapper;
4934 gboolean running_managed;
4936 ji = mono_thread_info_get_last_managed (info);
4937 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4938 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4940 if (running_managed && !protected_wrapper) {
4941 if (mono_threads_is_coop_enabled ()) {
4942 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4943 return MonoResumeThread;
4945 thread->state &= ~ThreadState_SuspendRequested;
4946 thread->state |= ThreadState_Suspended;
4947 return KeepSuspended;
4950 if (mono_thread_set_interruption_requested (thread))
4951 InterlockedIncrement (&thread_interruption_requested);
4952 if (data->interrupt)
4953 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4955 return MonoResumeThread;
4959 /* LOCKING: called with @thread synch_cs held, and releases it */
4961 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4963 SuspendThreadData data;
4965 g_assert (thread != mono_thread_internal_current ());
4967 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4969 thread->self_suspended = FALSE;
4971 data.thread = thread;
4972 data.interrupt = interrupt;
4973 data.interrupt_token = NULL;
4975 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4976 if (data.interrupt_token)
4977 mono_thread_info_finish_interrupt (data.interrupt_token);
4979 UNLOCK_THREAD (thread);
4982 /* LOCKING: called with @thread synch_cs held, and releases it */
4984 self_suspend_internal (void)
4986 MonoInternalThread *thread;
4988 MonoOSEventWaitRet res;
4990 thread = mono_thread_internal_current ();
4992 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4994 thread->self_suspended = TRUE;
4996 thread->state &= ~ThreadState_SuspendRequested;
4997 thread->state |= ThreadState_Suspended;
4999 UNLOCK_THREAD (thread);
5001 event = thread->suspended;
5004 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
5005 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
5010 suspend_for_shutdown_async_call (gpointer unused)
5013 mono_thread_info_yield ();
5016 static SuspendThreadResult
5017 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
5019 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
5020 return MonoResumeThread;
5024 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
5026 g_assert (thread != mono_thread_internal_current ());
5028 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
5032 * mono_thread_is_foreign:
5033 * @thread: the thread to query
5035 * This function allows one to determine if a thread was created by the mono runtime and has
5036 * a well defined lifecycle or it's a foreigh one, created by the native environment.
5038 * Returns: TRUE if @thread was not created by the runtime.
5041 mono_thread_is_foreign (MonoThread *thread)
5043 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
5044 return info->runtime_thread == FALSE;
5048 * mono_add_joinable_thread:
5050 * Add TID to the list of joinable threads.
5051 * LOCKING: Acquires the threads lock.
5054 mono_threads_add_joinable_thread (gpointer tid)
5058 * We cannot detach from threads because it causes problems like
5059 * 2fd16f60/r114307. So we collect them and join them when
5060 * we have time (in he finalizer thread).
5062 joinable_threads_lock ();
5063 if (!joinable_threads)
5064 joinable_threads = g_hash_table_new (NULL, NULL);
5065 g_hash_table_insert (joinable_threads, tid, tid);
5066 joinable_thread_count ++;
5067 joinable_threads_unlock ();
5069 mono_gc_finalize_notify ();
5074 * mono_threads_join_threads:
5076 * Join all joinable threads. This is called from the finalizer thread.
5077 * LOCKING: Acquires the threads lock.
5080 mono_threads_join_threads (void)
5083 GHashTableIter iter;
5090 if (!joinable_thread_count)
5094 joinable_threads_lock ();
5096 if (g_hash_table_size (joinable_threads)) {
5097 g_hash_table_iter_init (&iter, joinable_threads);
5098 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5099 thread = (pthread_t)tid;
5100 g_hash_table_remove (joinable_threads, key);
5101 joinable_thread_count --;
5104 joinable_threads_unlock ();
5106 if (thread != pthread_self ()) {
5108 /* This shouldn't block */
5109 mono_threads_join_lock ();
5110 mono_native_thread_join (thread);
5111 mono_threads_join_unlock ();
5124 * Wait for thread TID to exit.
5125 * LOCKING: Acquires the threads lock.
5128 mono_thread_join (gpointer tid)
5132 gboolean found = FALSE;
5134 joinable_threads_lock ();
5135 if (!joinable_threads)
5136 joinable_threads = g_hash_table_new (NULL, NULL);
5137 if (g_hash_table_lookup (joinable_threads, tid)) {
5138 g_hash_table_remove (joinable_threads, tid);
5139 joinable_thread_count --;
5142 joinable_threads_unlock ();
5145 thread = (pthread_t)tid;
5147 mono_native_thread_join (thread);
5153 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5155 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5156 mono_thread_interruption_checkpoint ();
5160 mono_thread_internal_unhandled_exception (MonoObject* exc)
5162 MonoClass *klass = exc->vtable->klass;
5163 if (is_threadabort_exception (klass)) {
5164 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5165 } else if (!is_appdomainunloaded_exception (klass)
5166 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5167 mono_unhandled_exception (exc);
5168 if (mono_environment_exitcode_get () == 1) {
5169 mono_environment_exitcode_set (255);
5170 mono_invoke_unhandled_exception_hook (exc);
5171 g_assert_not_reached ();
5177 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5180 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5181 mono_error_set_pending_exception (&error);
5185 * mono_threads_attach_coop: called by native->managed wrappers
5189 * - @return: the original domain which needs to be restored, or NULL.
5192 * - @dummy: contains the original domain
5193 * - @return: a cookie containing current MonoThreadInfo*.
5196 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5199 gboolean fresh_thread = FALSE;
5202 /* Happens when called from AOTed code which is only used in the root domain. */
5203 domain = mono_get_root_domain ();
5208 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5209 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5210 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5211 * we're only responsible for making the cookie. */
5212 if (mono_threads_is_coop_enabled ()) {
5213 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5214 fresh_thread = !info || !mono_thread_info_is_live (info);
5217 if (!mono_thread_internal_current ()) {
5218 mono_thread_attach_full (domain, FALSE);
5221 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5224 orig = mono_domain_get ();
5226 mono_domain_set (domain, TRUE);
5228 if (!mono_threads_is_coop_enabled ())
5229 return orig != domain ? orig : NULL;
5233 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5234 * return the right cookie. */
5235 return mono_threads_enter_gc_unsafe_region_cookie ();
5238 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5239 return mono_threads_enter_gc_unsafe_region (dummy);
5244 * mono_threads_detach_coop: called by native->managed wrappers
5247 * - @cookie: the original domain which needs to be restored, or NULL.
5251 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5252 * - @dummy: contains the original domain
5255 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5257 MonoDomain *domain, *orig;
5259 if (!mono_threads_is_coop_enabled ()) {
5260 orig = (MonoDomain*) cookie;
5262 mono_domain_set (orig, TRUE);
5264 orig = (MonoDomain*) *dummy;
5266 domain = mono_domain_get ();
5269 /* it won't do anything if cookie is NULL
5270 * thread state RUNNING -> (RUNNING|BLOCKING) */
5271 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5273 if (orig != domain) {
5275 mono_domain_unset ();
5277 mono_domain_set (orig, TRUE);
5283 mono_thread_try_resume_interruption (void)
5285 MonoInternalThread *thread;
5287 thread = mono_thread_internal_current ();
5288 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
5290 if (mono_thread_get_abort_prot_block_count (thread) > 0 || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5293 return mono_thread_resume_interruption ();
5297 /* Returns TRUE if the current thread is ready to be interrupted. */
5299 mono_threads_is_ready_to_be_interrupted (void)
5301 MonoInternalThread *thread;
5303 thread = mono_thread_internal_current ();
5304 LOCK_THREAD (thread);
5305 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5306 UNLOCK_THREAD (thread);
5310 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5311 UNLOCK_THREAD (thread);
5315 UNLOCK_THREAD (thread);
5321 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5323 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5325 if (internal->thread_info) {
5326 g_string_append (text, ", state : ");
5327 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5330 if (internal->owned_mutexes) {
5333 g_string_append (text, ", owns : [");
5334 for (i = 0; i < internal->owned_mutexes->len; i++)
5335 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5336 g_string_append (text, "]");
5341 mono_thread_internal_is_current (MonoInternalThread *internal)
5343 g_assert (internal);
5344 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));