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 ();
698 mono_thread_pop_appdomain_ref ();
703 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
706 /* We don't need to duplicate thread->handle, because it is
707 * only closed when the thread object is finalized by the GC. */
708 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
710 /* We have to do this here because mono_thread_start_cb
711 * requires that root_domain_thread is set up. */
712 if (thread_static_info.offset || thread_static_info.idx > 0) {
713 /* get the current allocated size */
714 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
715 mono_alloc_static_data (&internal->static_data, offset, TRUE);
718 mono_threads_unlock ();
720 root_domain = mono_get_root_domain ();
722 g_assert (!internal->root_domain_thread);
723 if (domain != root_domain)
724 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
726 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
728 if (domain != root_domain)
729 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
731 set_current_thread_for_domain (domain, internal, thread);
733 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
741 MonoObject *start_delegate;
742 MonoObject *start_delegate_arg;
743 MonoThreadStart start_func;
744 gpointer start_func_arg;
746 MonoCoopSem registered;
749 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
752 MonoThreadStart start_func;
753 void *start_func_arg;
756 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
760 MonoInternalThread *internal;
761 MonoObject *start_delegate;
762 MonoObject *start_delegate_arg;
765 thread = start_info->thread;
766 internal = thread->internal_thread;
767 domain = mono_object_domain (start_info->thread);
769 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
771 if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
772 start_info->failed = TRUE;
774 mono_coop_sem_post (&start_info->registered);
776 if (InterlockedDecrement (&start_info->ref) == 0) {
777 mono_coop_sem_destroy (&start_info->registered);
784 mono_thread_internal_set_priority (internal, internal->priority);
788 start_delegate = start_info->start_delegate;
789 start_delegate_arg = start_info->start_delegate_arg;
790 start_func = start_info->start_func;
791 start_func_arg = start_info->start_func_arg;
793 /* This MUST be called before any managed code can be
794 * executed, as it calls the callback function that (for the
795 * jit) sets the lmf marker.
798 if (mono_thread_start_cb)
799 mono_thread_start_cb (tid, stack_ptr, start_func);
801 /* On 2.0 profile (and higher), set explicitly since state might have been
803 if (internal->apartment_state == ThreadApartmentState_Unknown)
804 internal->apartment_state = ThreadApartmentState_MTA;
806 mono_thread_init_apartment_state ();
808 /* Let the thread that called Start() know we're ready */
809 mono_coop_sem_post (&start_info->registered);
811 if (InterlockedDecrement (&start_info->ref) == 0) {
812 mono_coop_sem_destroy (&start_info->registered);
816 /* start_info is not valid anymore */
820 * Call this after calling start_notify, since the profiler callback might want
821 * to lock the thread, and the lock is held by thread_start () which waits for
824 mono_profiler_thread_start (tid);
826 /* if the name was set before starting, we didn't invoke the profiler callback */
827 if (internal->name) {
828 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
829 mono_profiler_thread_name (internal->tid, tname);
830 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
834 /* start_func is set only for unmanaged start functions */
836 start_func (start_func_arg);
840 g_assert (start_delegate != NULL);
842 /* we may want to handle the exception here. See comment below on unhandled exceptions */
843 args [0] = (gpointer) start_delegate_arg;
844 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
846 if (!mono_error_ok (&error)) {
847 MonoException *ex = mono_error_convert_to_exception (&error);
849 g_assert (ex != NULL);
850 MonoClass *klass = mono_object_get_class (&ex->object);
851 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
852 !is_threadabort_exception (klass)) {
853 mono_unhandled_exception (&ex->object);
854 mono_invoke_unhandled_exception_hook (&ex->object);
855 g_assert_not_reached ();
858 mono_error_cleanup (&error);
862 /* If the thread calls ExitThread at all, this remaining code
863 * will not be executed, but the main thread will eventually
864 * call mono_thread_detach_internal() on this thread's behalf.
867 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
869 /* Do any cleanup needed for apartment state. This
870 * cannot be done in mono_thread_detach_internal since
871 * mono_thread_detach_internal could be called for a
872 * thread other than the current thread.
873 * mono_thread_cleanup_apartment_state cleans up apartment
874 * for the current thead */
875 mono_thread_cleanup_apartment_state ();
877 mono_thread_detach_internal (internal);
884 static gsize WINAPI start_wrapper(void *data)
886 volatile gsize dummy;
888 return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
894 * Common thread creation code.
895 * LOCKING: Acquires the threads lock.
898 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
899 gboolean threadpool_thread, guint32 stack_size, MonoError *error)
901 StartInfo *start_info = NULL;
902 MonoThreadHandle *thread_handle;
903 MonoNativeThreadId tid;
905 gsize stack_set_size;
908 g_assert (!start_func && !start_func_arg);
910 g_assert (!start_delegate);
913 * Join joinable threads to prevent running out of threads since the finalizer
914 * thread might be blocked/backlogged.
916 mono_threads_join_threads ();
920 mono_threads_lock ();
922 mono_threads_unlock ();
925 if (threads_starting_up == NULL) {
926 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
928 mono_g_hash_table_insert (threads_starting_up, thread, thread);
929 mono_threads_unlock ();
931 internal->threadpool_thread = threadpool_thread;
932 if (threadpool_thread)
933 mono_thread_set_state (internal, ThreadState_Background);
935 start_info = g_new0 (StartInfo, 1);
937 start_info->thread = thread;
938 start_info->start_delegate = start_delegate;
939 start_info->start_delegate_arg = thread->start_obj;
940 start_info->start_func = start_func;
941 start_info->start_func_arg = start_func_arg;
942 start_info->failed = FALSE;
943 mono_coop_sem_init (&start_info->registered, 0);
946 stack_set_size = default_stacksize_for_thread (internal);
950 thread_handle = mono_threads_create_thread (start_wrapper, start_info, &stack_set_size, &tid);
952 if (thread_handle == NULL) {
953 /* The thread couldn't be created, so set an exception */
954 mono_threads_lock ();
955 mono_g_hash_table_remove (threads_starting_up, thread);
956 mono_threads_unlock ();
957 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
958 /* ref is not going to be decremented in start_wrapper_internal */
959 InterlockedDecrement (&start_info->ref);
964 internal->stack_size = (int) stack_set_size;
966 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
969 * Wait for the thread to set up its TLS data etc, so
970 * theres no potential race condition if someone tries
971 * to look up the data believing the thread has
975 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
977 mono_threads_close_thread_handle (thread_handle);
979 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));
981 ret = !start_info->failed;
984 if (InterlockedDecrement (&start_info->ref) == 0) {
985 mono_coop_sem_destroy (&start_info->registered);
992 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
994 if (mono_thread_start_cb) {
995 mono_thread_start_cb (tid, stack_start, func);
999 void mono_threads_set_default_stacksize (guint32 stacksize)
1001 default_stacksize = stacksize;
1004 guint32 mono_threads_get_default_stacksize (void)
1006 return default_stacksize;
1010 * mono_thread_create_internal:
1012 * ARG should not be a GC reference.
1015 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
1018 MonoInternalThread *internal;
1023 internal = create_internal_thread_object ();
1025 thread = create_thread_object (domain, internal);
1027 LOCK_THREAD (internal);
1029 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
1030 return_val_if_nok (error, NULL);
1032 UNLOCK_THREAD (internal);
1038 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1041 if (!mono_thread_create_checked (domain, func, arg, &error))
1042 mono_error_cleanup (&error);
1046 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1048 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
1052 mono_thread_attach (MonoDomain *domain)
1054 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1060 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1062 MonoInternalThread *internal;
1064 MonoNativeThreadId tid;
1067 if (mono_thread_internal_current_is_attached ()) {
1068 if (domain != mono_domain_get ())
1069 mono_domain_set (domain, TRUE);
1070 /* Already attached */
1071 return mono_thread_current ();
1074 if (!mono_gc_register_thread (&domain)) {
1075 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 ());
1078 tid=mono_native_thread_id_get ();
1080 internal = create_internal_thread_object ();
1082 thread = create_thread_object (domain, internal);
1084 if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
1085 /* Mono is shutting down, so just wait for the end */
1087 mono_thread_info_sleep (10000, NULL);
1090 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1092 if (mono_thread_attach_cb) {
1096 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1099 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1101 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1104 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1105 if (!mono_thread_info_current ()->tools_thread)
1106 // FIXME: Need a separate callback
1107 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1113 mono_thread_detach_internal (MonoInternalThread *thread)
1117 g_assert (thread != NULL);
1119 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1122 mono_w32mutex_abandon ();
1125 if (thread->abort_state_handle) {
1126 mono_gchandle_free (thread->abort_state_handle);
1127 thread->abort_state_handle = 0;
1130 thread->abort_exc = NULL;
1131 thread->current_appcontext = NULL;
1134 * This is necessary because otherwise we might have
1135 * cross-domain references which will not get cleaned up when
1136 * the target domain is unloaded.
1138 if (thread->cached_culture_info) {
1140 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
1141 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
1145 * thread->synch_cs can be NULL if this was called after
1146 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1147 * This can happen only during shutdown.
1148 * The shutting_down flag is not always set, so we can't assert on it.
1150 if (thread->synch_cs)
1151 LOCK_THREAD (thread);
1153 thread->state |= ThreadState_Stopped;
1154 thread->state &= ~ThreadState_Background;
1156 if (thread->synch_cs)
1157 UNLOCK_THREAD (thread);
1160 An interruption request has leaked to cleanup. Adjust the global counter.
1162 This can happen is the abort source thread finds the abortee (this) thread
1163 in unmanaged code. If this thread never trips back to managed code or check
1164 the local flag it will be left set and positively unbalance the global counter.
1166 Leaving the counter unbalanced will cause a performance degradation since all threads
1167 will now keep checking their local flags all the time.
1169 if (mono_thread_clear_interruption_requested (thread))
1170 InterlockedDecrement (&thread_interruption_requested);
1172 mono_threads_lock ();
1176 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1177 /* We have to check whether the thread object for the
1178 * tid is still the same in the table because the
1179 * thread might have been destroyed and the tid reused
1180 * in the meantime, in which case the tid would be in
1181 * the table, but with another thread object.
1185 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1189 mono_threads_unlock ();
1191 /* Don't close the handle here, wait for the object finalizer
1192 * to do it. Otherwise, the following race condition applies:
1194 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1196 * 2) Some other handle is reassigned the same slot
1198 * 3) Another thread tries to join the first thread, and
1199 * blocks waiting for the reassigned handle to be signalled
1200 * (which might never happen). This is possible, because the
1201 * thread calling Join() still has a reference to the first
1205 /* if the thread is not in the hash it has been removed already */
1207 mono_domain_unset ();
1208 mono_memory_barrier ();
1210 if (mono_thread_cleanup_fn)
1211 mono_thread_cleanup_fn (thread_get_tid (thread));
1216 mono_release_type_locks (thread);
1218 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1219 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1220 mono_profiler_thread_end (thread->tid);
1222 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1225 * This will signal async signal handlers that the thread has exited.
1226 * The profiler callback needs this to be set, so it cannot be done earlier.
1228 mono_domain_unset ();
1229 mono_memory_barrier ();
1231 if (thread == mono_thread_internal_current ())
1232 mono_thread_pop_appdomain_ref ();
1234 thread->cached_culture_info = NULL;
1236 mono_free_static_data (thread->static_data);
1237 thread->static_data = NULL;
1238 ref_stack_destroy (thread->appdomain_refs);
1239 thread->appdomain_refs = NULL;
1241 g_assert (thread->suspended);
1242 mono_os_event_destroy (thread->suspended);
1243 g_free (thread->suspended);
1244 thread->suspended = NULL;
1246 if (mono_thread_cleanup_fn)
1247 mono_thread_cleanup_fn (thread_get_tid (thread));
1249 mono_memory_barrier ();
1251 if (mono_gc_is_moving ()) {
1252 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1253 thread->thread_pinning_ref = NULL;
1257 SET_CURRENT_OBJECT (NULL);
1258 mono_domain_unset ();
1260 /* Don't need to close the handle to this thread, even though we took a
1261 * reference in mono_thread_attach (), because the GC will do it
1262 * when the Thread object is finalised.
1267 mono_thread_detach (MonoThread *thread)
1270 mono_thread_detach_internal (thread->internal_thread);
1274 * mono_thread_detach_if_exiting:
1276 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1277 * This should be used at the end of embedding code which calls into managed code, and which
1278 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1281 mono_thread_detach_if_exiting (void)
1283 if (mono_thread_info_is_exiting ()) {
1284 MonoInternalThread *thread;
1286 thread = mono_thread_internal_current ();
1288 mono_thread_detach_internal (thread);
1289 mono_thread_info_detach ();
1297 mono_thread_internal_current_is_attached (void)
1299 MonoInternalThread *internal;
1301 internal = GET_CURRENT_OBJECT ();
1309 mono_thread_exit (void)
1311 MonoInternalThread *thread = mono_thread_internal_current ();
1313 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1315 mono_thread_detach_internal (thread);
1317 /* we could add a callback here for embedders to use. */
1318 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1319 exit (mono_environment_exitcode_get ());
1321 mono_thread_info_exit (0);
1325 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1327 MonoInternalThread *internal;
1329 internal = create_internal_thread_object ();
1331 internal->state = ThreadState_Unstarted;
1333 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1337 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1339 return mono_thread_current ();
1343 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1347 MonoInternalThread *internal;
1350 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1352 if (!this_obj->internal_thread)
1353 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1354 internal = this_obj->internal_thread;
1356 LOCK_THREAD (internal);
1358 if ((internal->state & ThreadState_Unstarted) == 0) {
1359 UNLOCK_THREAD (internal);
1360 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1364 if ((internal->state & ThreadState_Aborted) != 0) {
1365 UNLOCK_THREAD (internal);
1369 res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1371 mono_error_cleanup (&error);
1372 UNLOCK_THREAD (internal);
1376 internal->state &= ~ThreadState_Unstarted;
1378 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1380 UNLOCK_THREAD (internal);
1381 return internal->handle;
1385 * This is called from the finalizer of the internal thread object.
1388 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1390 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1393 * Since threads keep a reference to their thread object while running, by
1394 * the time this function is called, the thread has already exited/detached,
1395 * i.e. mono_thread_detach_internal () has ran. The exception is during
1396 * shutdown, when mono_thread_detach_internal () can be called after this.
1398 if (this_obj->handle) {
1399 mono_threads_close_thread_handle (this_obj->handle);
1400 this_obj->handle = NULL;
1404 CloseHandle (this_obj->native_handle);
1407 if (this_obj->synch_cs) {
1408 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1409 this_obj->synch_cs = NULL;
1410 mono_coop_mutex_destroy (synch_cs);
1414 if (this_obj->name) {
1415 void *name = this_obj->name;
1416 this_obj->name = NULL;
1422 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1425 MonoInternalThread *thread = mono_thread_internal_current ();
1427 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1429 if (mono_thread_current_check_pending_interrupt ())
1433 gboolean alerted = FALSE;
1435 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1437 res = mono_thread_info_sleep (ms, &alerted);
1439 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1442 MonoException* exc = mono_thread_execute_interruption ();
1444 mono_raise_exception (exc);
1446 // FIXME: !MONO_INFINITE_WAIT
1447 if (ms != MONO_INFINITE_WAIT)
1456 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1461 ves_icall_System_Threading_Thread_GetDomainID (void)
1463 return mono_domain_get()->domain_id;
1467 ves_icall_System_Threading_Thread_Yield (void)
1469 return mono_thread_info_yield ();
1473 * mono_thread_get_name:
1475 * Return the name of the thread. NAME_LEN is set to the length of the name.
1476 * Return NULL if the thread has no name. The returned memory is owned by the
1480 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1484 LOCK_THREAD (this_obj);
1486 if (!this_obj->name) {
1490 *name_len = this_obj->name_len;
1491 res = g_new (gunichar2, this_obj->name_len);
1492 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1495 UNLOCK_THREAD (this_obj);
1501 * mono_thread_get_name_utf8:
1503 * Return the name of the thread in UTF-8.
1504 * Return NULL if the thread has no name.
1505 * The returned memory is owned by the caller.
1508 mono_thread_get_name_utf8 (MonoThread *thread)
1513 MonoInternalThread *internal = thread->internal_thread;
1514 if (internal == NULL)
1517 LOCK_THREAD (internal);
1519 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1521 UNLOCK_THREAD (internal);
1527 * mono_thread_get_managed_id:
1529 * Return the Thread.ManagedThreadId value of `thread`.
1530 * Returns -1 if `thread` is NULL.
1533 mono_thread_get_managed_id (MonoThread *thread)
1538 MonoInternalThread *internal = thread->internal_thread;
1539 if (internal == NULL)
1542 int32_t id = internal->managed_id;
1548 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1553 error_init (&error);
1555 LOCK_THREAD (this_obj);
1557 if (!this_obj->name)
1560 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1562 UNLOCK_THREAD (this_obj);
1564 if (mono_error_set_pending_exception (&error))
1571 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1573 LOCK_THREAD (this_obj);
1578 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1579 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1580 UNLOCK_THREAD (this_obj);
1582 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1585 if (this_obj->name) {
1586 g_free (this_obj->name);
1587 this_obj->name_len = 0;
1590 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1591 this_obj->name_len = mono_string_length (name);
1594 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1597 this_obj->name = NULL;
1600 UNLOCK_THREAD (this_obj);
1602 if (this_obj->name && this_obj->tid) {
1603 char *tname = mono_string_to_utf8_checked (name, error);
1604 return_if_nok (error);
1605 mono_profiler_thread_name (this_obj->tid, tname);
1606 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1612 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1615 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1616 mono_error_set_pending_exception (&error);
1620 * ves_icall_System_Threading_Thread_GetPriority_internal:
1621 * @param this_obj: The MonoInternalThread on which to operate.
1623 * Gets the priority of the given thread.
1624 * @return: The priority of the given thread.
1627 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1630 MonoInternalThread *internal = this_obj->internal_thread;
1632 LOCK_THREAD (internal);
1633 priority = internal->priority;
1634 UNLOCK_THREAD (internal);
1640 * ves_icall_System_Threading_Thread_SetPriority_internal:
1641 * @param this_obj: The MonoInternalThread on which to operate.
1642 * @param priority: The priority to set.
1644 * Sets the priority of the given thread.
1647 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1649 MonoInternalThread *internal = this_obj->internal_thread;
1651 LOCK_THREAD (internal);
1652 internal->priority = priority;
1653 if (internal->thread_info != NULL)
1654 mono_thread_internal_set_priority (internal, priority);
1655 UNLOCK_THREAD (internal);
1658 /* If the array is already in the requested domain, we just return it,
1659 otherwise we return a copy in that domain. */
1661 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1669 if (mono_object_domain (arr) == domain)
1672 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1673 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1678 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1681 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1682 mono_error_set_pending_exception (&error);
1687 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1690 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1691 mono_error_set_pending_exception (&error);
1696 mono_thread_current (void)
1698 MonoDomain *domain = mono_domain_get ();
1699 MonoInternalThread *internal = mono_thread_internal_current ();
1700 MonoThread **current_thread_ptr;
1702 g_assert (internal);
1703 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1705 if (!*current_thread_ptr) {
1706 g_assert (domain != mono_get_root_domain ());
1707 *current_thread_ptr = create_thread_object (domain, internal);
1709 return *current_thread_ptr;
1712 /* Return the thread object belonging to INTERNAL in the current domain */
1714 mono_thread_current_for_thread (MonoInternalThread *internal)
1716 MonoDomain *domain = mono_domain_get ();
1717 MonoThread **current_thread_ptr;
1719 g_assert (internal);
1720 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1722 if (!*current_thread_ptr) {
1723 g_assert (domain != mono_get_root_domain ());
1724 *current_thread_ptr = create_thread_object (domain, internal);
1726 return *current_thread_ptr;
1730 mono_thread_internal_current (void)
1732 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1733 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1737 static MonoThreadInfoWaitRet
1738 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1741 MonoThreadInfoWaitRet ret;
1748 start = (ms == -1) ? 0 : mono_msec_ticks ();
1751 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1754 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1757 exc = mono_thread_execute_interruption ();
1759 mono_error_set_exception_instance (error, exc);
1766 /* Re-calculate ms according to the time passed */
1767 diff_ms = (gint32)(mono_msec_ticks () - start);
1768 if (diff_ms >= ms) {
1769 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1772 wait = ms - diff_ms;
1779 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1781 MonoInternalThread *thread = this_obj->internal_thread;
1782 MonoThreadHandle *handle = thread->handle;
1783 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1787 if (mono_thread_current_check_pending_interrupt ())
1790 LOCK_THREAD (thread);
1792 if ((thread->state & ThreadState_Unstarted) != 0) {
1793 UNLOCK_THREAD (thread);
1795 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1799 UNLOCK_THREAD (thread);
1802 ms=MONO_INFINITE_WAIT;
1804 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1806 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1808 ret=mono_join_uninterrupted (handle, ms, &error);
1810 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1812 mono_error_set_pending_exception (&error);
1814 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1815 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1820 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1825 #define MANAGED_WAIT_FAILED 0x7fffffff
1828 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1830 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1831 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1832 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1833 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1834 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1835 return WAIT_IO_COMPLETION;
1836 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1837 return WAIT_TIMEOUT;
1838 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1839 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1840 return MANAGED_WAIT_FAILED;
1842 g_error ("%s: unknown val value %d", __func__, val);
1846 static MonoW32HandleWaitRet
1847 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1850 MonoW32HandleWaitRet ret;
1857 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1861 if (numhandles != 1)
1862 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1864 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1866 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1867 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1868 #endif /* HOST_WIN32 */
1871 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1874 exc = mono_thread_execute_interruption ();
1876 mono_error_set_exception_instance (error, exc);
1883 /* Re-calculate ms according to the time passed */
1884 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1885 if (diff_ms >= ms) {
1886 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1889 wait = ms - diff_ms;
1895 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1900 MonoW32HandleWaitRet ret;
1902 MonoObject *waitHandle;
1903 MonoInternalThread *thread = mono_thread_internal_current ();
1905 /* Do this WaitSleepJoin check before creating objects */
1906 if (mono_thread_current_check_pending_interrupt ())
1907 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1909 /* We fail in managed if the array has more than 64 elements */
1910 numhandles = (guint32)mono_array_length(mono_handles);
1911 handles = g_new0(HANDLE, numhandles);
1913 for(i = 0; i < numhandles; i++) {
1914 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1915 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1919 ms=MONO_INFINITE_WAIT;
1922 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1924 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1926 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1930 mono_error_set_pending_exception (&error);
1932 return map_native_wait_result_to_managed (ret, numhandles);
1935 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1938 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1939 uintptr_t numhandles;
1940 MonoW32HandleWaitRet ret;
1942 MonoObject *waitHandle;
1943 MonoInternalThread *thread = mono_thread_internal_current ();
1945 /* Do this WaitSleepJoin check before creating objects */
1946 if (mono_thread_current_check_pending_interrupt ())
1947 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1949 numhandles = mono_array_length(mono_handles);
1950 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1951 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1953 for(i = 0; i < numhandles; i++) {
1954 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1955 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1959 ms=MONO_INFINITE_WAIT;
1962 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1964 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1966 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1968 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1970 mono_error_set_pending_exception (&error);
1972 return map_native_wait_result_to_managed (ret, numhandles);
1975 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1978 MonoW32HandleWaitRet ret;
1979 MonoInternalThread *thread = mono_thread_internal_current ();
1981 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1984 ms=MONO_INFINITE_WAIT;
1987 if (mono_thread_current_check_pending_interrupt ())
1988 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1990 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1992 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1994 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1996 mono_error_set_pending_exception (&error);
1997 return map_native_wait_result_to_managed (ret, 1);
2001 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
2003 MonoW32HandleWaitRet ret;
2004 MonoInternalThread *thread = mono_thread_internal_current ();
2007 ms = MONO_INFINITE_WAIT;
2009 if (mono_thread_current_check_pending_interrupt ())
2010 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2012 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2016 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2018 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2022 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2024 return map_native_wait_result_to_managed (ret, 1);
2027 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2029 return InterlockedIncrement (location);
2032 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2034 #if SIZEOF_VOID_P == 4
2035 if (G_UNLIKELY ((size_t)location & 0x7)) {
2037 mono_interlocked_lock ();
2040 mono_interlocked_unlock ();
2044 return InterlockedIncrement64 (location);
2047 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2049 return InterlockedDecrement(location);
2052 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2054 #if SIZEOF_VOID_P == 4
2055 if (G_UNLIKELY ((size_t)location & 0x7)) {
2057 mono_interlocked_lock ();
2060 mono_interlocked_unlock ();
2064 return InterlockedDecrement64 (location);
2067 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2069 return InterlockedExchange(location, value);
2072 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2075 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2076 mono_gc_wbarrier_generic_nostore (location);
2080 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2082 return InterlockedExchangePointer(location, value);
2085 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2087 IntFloatUnion val, ret;
2090 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2096 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2098 #if SIZEOF_VOID_P == 4
2099 if (G_UNLIKELY ((size_t)location & 0x7)) {
2101 mono_interlocked_lock ();
2104 mono_interlocked_unlock ();
2108 return InterlockedExchange64 (location, value);
2112 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2114 LongDoubleUnion val, ret;
2117 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2122 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2124 return InterlockedCompareExchange(location, value, comparand);
2127 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2129 gint32 r = InterlockedCompareExchange(location, value, comparand);
2130 *success = r == comparand;
2134 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2137 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2138 mono_gc_wbarrier_generic_nostore (location);
2142 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2144 return InterlockedCompareExchangePointer(location, value, comparand);
2147 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2149 IntFloatUnion val, ret, cmp;
2152 cmp.fval = comparand;
2153 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2159 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2161 #if SIZEOF_VOID_P == 8
2162 LongDoubleUnion val, comp, ret;
2165 comp.fval = comparand;
2166 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2172 mono_interlocked_lock ();
2174 if (old == comparand)
2176 mono_interlocked_unlock ();
2183 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2185 #if SIZEOF_VOID_P == 4
2186 if (G_UNLIKELY ((size_t)location & 0x7)) {
2188 mono_interlocked_lock ();
2190 if (old == comparand)
2192 mono_interlocked_unlock ();
2196 return InterlockedCompareExchange64 (location, value, comparand);
2200 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2203 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2204 mono_gc_wbarrier_generic_nostore (location);
2209 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2212 MONO_CHECK_NULL (location, NULL);
2213 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2214 mono_gc_wbarrier_generic_nostore (location);
2219 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2221 return InterlockedAdd (location, value);
2225 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2227 #if SIZEOF_VOID_P == 4
2228 if (G_UNLIKELY ((size_t)location & 0x7)) {
2230 mono_interlocked_lock ();
2233 mono_interlocked_unlock ();
2237 return InterlockedAdd64 (location, value);
2241 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2243 #if SIZEOF_VOID_P == 4
2244 if (G_UNLIKELY ((size_t)location & 0x7)) {
2246 mono_interlocked_lock ();
2248 mono_interlocked_unlock ();
2252 return InterlockedRead64 (location);
2256 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2258 mono_memory_barrier ();
2262 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2264 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2266 if (state & ThreadState_Background) {
2267 /* If the thread changes the background mode, the main thread has to
2268 * be notified, since it has to rebuild the list of threads to
2271 mono_os_event_set (&background_change_event);
2276 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2278 mono_thread_set_state (this_obj, (MonoThreadState)state);
2280 if (state & ThreadState_Background) {
2281 /* If the thread changes the background mode, the main thread has to
2282 * be notified, since it has to rebuild the list of threads to
2285 mono_os_event_set (&background_change_event);
2290 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2294 LOCK_THREAD (this_obj);
2296 state = this_obj->state;
2298 UNLOCK_THREAD (this_obj);
2303 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2305 MonoInternalThread *current;
2307 MonoInternalThread *thread = this_obj->internal_thread;
2309 LOCK_THREAD (thread);
2311 current = mono_thread_internal_current ();
2313 thread->thread_interrupt_requested = TRUE;
2314 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2316 UNLOCK_THREAD (thread);
2319 async_abort_internal (thread, FALSE);
2324 * mono_thread_current_check_pending_interrupt:
2326 * Checks if there's a interruption request and set the pending exception if so.
2328 * @returns true if a pending exception was set
2331 mono_thread_current_check_pending_interrupt (void)
2333 MonoInternalThread *thread = mono_thread_internal_current ();
2334 gboolean throw_ = FALSE;
2336 LOCK_THREAD (thread);
2338 if (thread->thread_interrupt_requested) {
2340 thread->thread_interrupt_requested = FALSE;
2343 UNLOCK_THREAD (thread);
2346 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2351 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2353 LOCK_THREAD (thread);
2355 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2356 (thread->state & ThreadState_StopRequested) != 0 ||
2357 (thread->state & ThreadState_Stopped) != 0)
2359 UNLOCK_THREAD (thread);
2363 if ((thread->state & ThreadState_Unstarted) != 0) {
2364 thread->state |= ThreadState_Aborted;
2365 UNLOCK_THREAD (thread);
2369 thread->state |= ThreadState_AbortRequested;
2370 if (thread->abort_state_handle)
2371 mono_gchandle_free (thread->abort_state_handle);
2373 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2374 g_assert (thread->abort_state_handle);
2376 thread->abort_state_handle = 0;
2378 thread->abort_exc = NULL;
2380 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));
2382 /* During shutdown, we can't wait for other threads */
2384 /* Make sure the thread is awake */
2385 mono_thread_resume (thread);
2387 UNLOCK_THREAD (thread);
2392 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2394 if (!request_thread_abort (thread, state))
2397 if (thread == mono_thread_internal_current ()) {
2399 self_abort_internal (&error);
2400 mono_error_set_pending_exception (&error);
2402 async_abort_internal (thread, TRUE);
2407 * mono_thread_internal_abort:
2409 * Request thread @thread to be aborted.
2411 * @thread MUST NOT be the current thread.
2414 mono_thread_internal_abort (MonoInternalThread *thread)
2416 g_assert (thread != mono_thread_internal_current ());
2418 if (!request_thread_abort (thread, NULL))
2420 async_abort_internal (thread, TRUE);
2424 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2426 MonoInternalThread *thread = mono_thread_internal_current ();
2427 gboolean was_aborting;
2429 LOCK_THREAD (thread);
2430 was_aborting = thread->state & ThreadState_AbortRequested;
2431 thread->state &= ~ThreadState_AbortRequested;
2432 UNLOCK_THREAD (thread);
2434 if (!was_aborting) {
2435 const char *msg = "Unable to reset abort because no abort was requested";
2436 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2440 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2441 thread->abort_exc = NULL;
2442 if (thread->abort_state_handle) {
2443 mono_gchandle_free (thread->abort_state_handle);
2444 /* This is actually not necessary - the handle
2445 only counts if the exception is set */
2446 thread->abort_state_handle = 0;
2451 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2453 LOCK_THREAD (thread);
2455 thread->state &= ~ThreadState_AbortRequested;
2457 if (thread->abort_exc) {
2458 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2459 thread->abort_exc = NULL;
2460 if (thread->abort_state_handle) {
2461 mono_gchandle_free (thread->abort_state_handle);
2462 /* This is actually not necessary - the handle
2463 only counts if the exception is set */
2464 thread->abort_state_handle = 0;
2468 UNLOCK_THREAD (thread);
2472 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2475 MonoInternalThread *thread = this_obj->internal_thread;
2476 MonoObject *state, *deserialized = NULL;
2479 if (!thread->abort_state_handle)
2482 state = mono_gchandle_get_target (thread->abort_state_handle);
2485 domain = mono_domain_get ();
2486 if (mono_object_domain (state) == domain)
2489 deserialized = mono_object_xdomain_representation (state, domain, &error);
2491 if (!deserialized) {
2492 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2493 if (!is_ok (&error)) {
2494 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2495 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2497 mono_set_pending_exception (invalid_op_exc);
2501 return deserialized;
2505 mono_thread_suspend (MonoInternalThread *thread)
2507 LOCK_THREAD (thread);
2509 if ((thread->state & ThreadState_Unstarted) != 0 ||
2510 (thread->state & ThreadState_Aborted) != 0 ||
2511 (thread->state & ThreadState_Stopped) != 0)
2513 UNLOCK_THREAD (thread);
2517 if ((thread->state & ThreadState_Suspended) != 0 ||
2518 (thread->state & ThreadState_SuspendRequested) != 0 ||
2519 (thread->state & ThreadState_StopRequested) != 0)
2521 UNLOCK_THREAD (thread);
2525 thread->state |= ThreadState_SuspendRequested;
2526 mono_os_event_reset (thread->suspended);
2528 if (thread == mono_thread_internal_current ()) {
2529 /* calls UNLOCK_THREAD (thread) */
2530 self_suspend_internal ();
2532 /* calls UNLOCK_THREAD (thread) */
2533 async_suspend_internal (thread, FALSE);
2540 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2542 if (!mono_thread_suspend (this_obj->internal_thread)) {
2543 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2548 /* LOCKING: LOCK_THREAD(thread) must be held */
2550 mono_thread_resume (MonoInternalThread *thread)
2552 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2553 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2554 thread->state &= ~ThreadState_SuspendRequested;
2555 mono_os_event_set (thread->suspended);
2559 if ((thread->state & ThreadState_Suspended) == 0 ||
2560 (thread->state & ThreadState_Unstarted) != 0 ||
2561 (thread->state & ThreadState_Aborted) != 0 ||
2562 (thread->state & ThreadState_Stopped) != 0)
2564 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2568 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2570 mono_os_event_set (thread->suspended);
2572 if (!thread->self_suspended) {
2573 UNLOCK_THREAD (thread);
2575 /* Awake the thread */
2576 if (!mono_thread_info_resume (thread_get_tid (thread)))
2579 LOCK_THREAD (thread);
2582 thread->state &= ~ThreadState_Suspended;
2588 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2590 if (!thread->internal_thread) {
2591 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2593 LOCK_THREAD (thread->internal_thread);
2594 if (!mono_thread_resume (thread->internal_thread))
2595 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2596 UNLOCK_THREAD (thread->internal_thread);
2601 mono_threads_is_critical_method (MonoMethod *method)
2603 switch (method->wrapper_type) {
2604 case MONO_WRAPPER_RUNTIME_INVOKE:
2605 case MONO_WRAPPER_XDOMAIN_INVOKE:
2606 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2613 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2618 if (mono_threads_is_critical_method (m)) {
2619 *((gboolean*)data) = TRUE;
2626 is_running_protected_wrapper (void)
2628 gboolean found = FALSE;
2629 mono_stack_walk (find_wrapper, &found);
2634 mono_thread_stop (MonoThread *thread)
2636 MonoInternalThread *internal = thread->internal_thread;
2638 LOCK_THREAD (internal);
2640 if (internal->state & (ThreadState_StopRequested | ThreadState_Stopped))
2642 UNLOCK_THREAD (internal);
2646 /* Make sure the internal is awake */
2647 mono_thread_resume (internal);
2649 internal->state |= ThreadState_StopRequested;
2650 internal->state &= ~ThreadState_AbortRequested;
2652 UNLOCK_THREAD (internal);
2654 if (internal == mono_thread_internal_current ()) {
2656 self_abort_internal (&error);
2658 This function is part of the embeding API and has no way to return the exception
2659 to be thrown. So what we do is keep the old behavior and raise the exception.
2661 mono_error_raise_exception (&error); /* OK to throw, see note */
2663 async_abort_internal (internal, TRUE);
2668 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2670 gint8 tmp = *(volatile gint8 *)ptr;
2671 mono_memory_barrier ();
2676 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2678 gint16 tmp = *(volatile gint16 *)ptr;
2679 mono_memory_barrier ();
2684 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2686 gint32 tmp = *(volatile gint32 *)ptr;
2687 mono_memory_barrier ();
2692 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2694 gint64 tmp = *(volatile gint64 *)ptr;
2695 mono_memory_barrier ();
2700 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2702 volatile void *tmp = *(volatile void **)ptr;
2703 mono_memory_barrier ();
2704 return (void *) tmp;
2708 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2710 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2711 mono_memory_barrier ();
2712 return (MonoObject *) tmp;
2716 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2718 double tmp = *(volatile double *)ptr;
2719 mono_memory_barrier ();
2724 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2726 float tmp = *(volatile float *)ptr;
2727 mono_memory_barrier ();
2732 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2734 return InterlockedRead8 ((volatile gint8 *)ptr);
2738 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2740 return InterlockedRead16 ((volatile gint16 *)ptr);
2744 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2746 return InterlockedRead ((volatile gint32 *)ptr);
2750 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2752 #if SIZEOF_VOID_P == 4
2753 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2755 mono_interlocked_lock ();
2756 val = *(gint64*)ptr;
2757 mono_interlocked_unlock ();
2761 return InterlockedRead64 ((volatile gint64 *)ptr);
2765 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2767 return InterlockedReadPointer ((volatile gpointer *)ptr);
2771 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2775 #if SIZEOF_VOID_P == 4
2776 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2778 mono_interlocked_lock ();
2779 val = *(double*)ptr;
2780 mono_interlocked_unlock ();
2785 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2791 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2795 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2801 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2803 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2807 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2809 mono_memory_barrier ();
2810 *(volatile gint8 *)ptr = value;
2814 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2816 mono_memory_barrier ();
2817 *(volatile gint16 *)ptr = value;
2821 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2823 mono_memory_barrier ();
2824 *(volatile gint32 *)ptr = value;
2828 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2830 mono_memory_barrier ();
2831 *(volatile gint64 *)ptr = value;
2835 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2837 mono_memory_barrier ();
2838 *(volatile void **)ptr = value;
2842 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2844 mono_memory_barrier ();
2845 mono_gc_wbarrier_generic_store (ptr, value);
2849 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2851 mono_memory_barrier ();
2852 *(volatile double *)ptr = value;
2856 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2858 mono_memory_barrier ();
2859 *(volatile float *)ptr = value;
2863 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2865 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2869 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2871 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2875 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2877 InterlockedWrite ((volatile gint32 *)ptr, value);
2881 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2883 #if SIZEOF_VOID_P == 4
2884 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2885 mono_interlocked_lock ();
2886 *(gint64*)ptr = value;
2887 mono_interlocked_unlock ();
2892 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2896 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2898 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2902 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2906 #if SIZEOF_VOID_P == 4
2907 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2908 mono_interlocked_lock ();
2909 *(double*)ptr = value;
2910 mono_interlocked_unlock ();
2917 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2921 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2927 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2931 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2933 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2937 free_context (void *user_data)
2939 ContextStaticData *data = user_data;
2941 mono_threads_lock ();
2944 * There is no guarantee that, by the point this reference queue callback
2945 * has been invoked, the GC handle associated with the object will fail to
2946 * resolve as one might expect. So if we don't free and remove the GC
2947 * handle here, free_context_static_data_helper () could end up resolving
2948 * a GC handle to an actually-dead context which would contain a pointer
2949 * to an already-freed static data segment, resulting in a crash when
2952 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2954 mono_threads_unlock ();
2956 mono_gchandle_free (data->gc_handle);
2957 mono_free_static_data (data->static_data);
2962 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2964 mono_threads_lock ();
2966 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2969 contexts = g_hash_table_new (NULL, NULL);
2972 context_queue = mono_gc_reference_queue_new (free_context);
2974 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2975 g_hash_table_insert (contexts, gch, gch);
2978 * We use this intermediate structure to contain a duplicate pointer to
2979 * the static data because we can't rely on being able to resolve the GC
2980 * handle in the reference queue callback.
2982 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2983 data->gc_handle = GPOINTER_TO_UINT (gch);
2986 context_adjust_static_data (ctx);
2987 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2989 mono_threads_unlock ();
2991 mono_profiler_context_loaded (ctx);
2995 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2998 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2999 * cleanup in exceptional circumstances, we don't actually do any
3000 * cleanup work here. We instead do this via a reference queue.
3003 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
3005 mono_profiler_context_unloaded (ctx);
3008 void mono_thread_init (MonoThreadStartCB start_cb,
3009 MonoThreadAttachCB attach_cb)
3011 mono_coop_mutex_init_recursive (&threads_mutex);
3013 mono_os_mutex_init_recursive(&interlocked_mutex);
3014 mono_os_mutex_init_recursive(&joinable_threads_mutex);
3016 mono_os_event_init (&background_change_event, FALSE);
3018 mono_init_static_data_info (&thread_static_info);
3019 mono_init_static_data_info (&context_static_info);
3021 mono_thread_start_cb = start_cb;
3022 mono_thread_attach_cb = attach_cb;
3025 void mono_thread_cleanup (void)
3027 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3028 /* The main thread must abandon any held mutexes (particularly
3029 * important for named mutexes as they are shared across
3030 * processes, see bug 74680.) This will happen when the
3031 * thread exits, but if it's not running in a subthread it
3032 * won't exit in time.
3034 mono_w32mutex_abandon ();
3038 /* This stuff needs more testing, it seems one of these
3039 * critical sections can be locked when mono_thread_cleanup is
3042 mono_coop_mutex_destroy (&threads_mutex);
3043 mono_os_mutex_destroy (&interlocked_mutex);
3044 mono_os_mutex_destroy (&delayed_free_table_mutex);
3045 mono_os_mutex_destroy (&small_id_mutex);
3046 mono_os_event_destroy (&background_change_event);
3051 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3053 mono_thread_cleanup_fn = func;
3057 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3059 thread->internal_thread->manage_callback = func;
3063 static void print_tids (gpointer key, gpointer value, gpointer user)
3065 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3066 * sizeof(uint) and a cast to uint would overflow
3068 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3069 * print this as a pointer.
3071 g_message ("Waiting for: %p", key);
3076 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3077 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3082 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3085 MonoThreadInfoWaitRet ret;
3087 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3089 /* Add the thread state change event, so it wakes
3090 * up if a thread changes to background mode. */
3093 if (check_state_change)
3094 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3096 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3099 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3100 /* See the comment in build_wait_tids() */
3101 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3105 for( i = 0; i < wait->num; i++)
3106 mono_threads_close_thread_handle (wait->handles [i]);
3108 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3111 if (ret < wait->num) {
3112 MonoInternalThread *internal;
3114 internal = wait->threads [ret];
3116 mono_threads_lock ();
3117 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3118 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3119 mono_threads_unlock ();
3123 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3125 struct wait_data *wait=(struct wait_data *)user;
3127 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3128 MonoInternalThread *thread=(MonoInternalThread *)value;
3130 /* Ignore background threads, we abort them later */
3131 /* Do not lock here since it is not needed and the caller holds threads_lock */
3132 if (thread->state & ThreadState_Background) {
3133 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3134 return; /* just leave, ignore */
3137 if (mono_gc_is_finalizer_internal_thread (thread)) {
3138 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3142 if (thread == mono_thread_internal_current ()) {
3143 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3147 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3148 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3152 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3153 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3157 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3158 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3159 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3160 wait->threads[wait->num]=thread;
3163 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3165 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3170 /* Just ignore the rest, we can't do anything with
3177 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3179 struct wait_data *wait=(struct wait_data *)user;
3180 MonoNativeThreadId self = mono_native_thread_id_get ();
3181 MonoInternalThread *thread = (MonoInternalThread *)value;
3183 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3186 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3188 if (mono_gc_is_finalizer_internal_thread (thread))
3191 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3192 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3193 wait->threads[wait->num] = thread;
3196 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3197 mono_thread_internal_abort (thread);
3204 * mono_threads_set_shutting_down:
3206 * Is called by a thread that wants to shut down Mono. If the runtime is already
3207 * shutting down, the calling thread is suspended/stopped, and this function never
3211 mono_threads_set_shutting_down (void)
3213 MonoInternalThread *current_thread = mono_thread_internal_current ();
3215 mono_threads_lock ();
3217 if (shutting_down) {
3218 mono_threads_unlock ();
3220 /* Make sure we're properly suspended/stopped */
3222 LOCK_THREAD (current_thread);
3224 if ((current_thread->state & ThreadState_SuspendRequested) ||
3225 (current_thread->state & ThreadState_AbortRequested) ||
3226 (current_thread->state & ThreadState_StopRequested)) {
3227 UNLOCK_THREAD (current_thread);
3228 mono_thread_execute_interruption ();
3230 current_thread->state |= ThreadState_Stopped;
3231 UNLOCK_THREAD (current_thread);
3234 /*since we're killing the thread, detach it.*/
3235 mono_thread_detach_internal (current_thread);
3237 /* Wake up other threads potentially waiting for us */
3238 mono_thread_info_exit (0);
3240 shutting_down = TRUE;
3242 /* Not really a background state change, but this will
3243 * interrupt the main thread if it is waiting for all
3244 * the other threads.
3246 mono_os_event_set (&background_change_event);
3248 mono_threads_unlock ();
3252 void mono_thread_manage (void)
3254 struct wait_data wait_data;
3255 struct wait_data *wait = &wait_data;
3257 memset (wait, 0, sizeof (struct wait_data));
3258 /* join each thread that's still running */
3259 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3261 mono_threads_lock ();
3263 THREAD_DEBUG (g_message("%s: No threads", __func__));
3264 mono_threads_unlock ();
3267 mono_threads_unlock ();
3270 mono_threads_lock ();
3271 if (shutting_down) {
3272 /* somebody else is shutting down */
3273 mono_threads_unlock ();
3276 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3277 mono_g_hash_table_foreach (threads, print_tids, NULL));
3279 mono_os_event_reset (&background_change_event);
3281 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3282 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3283 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3284 mono_threads_unlock ();
3286 /* Something to wait for */
3287 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3288 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3289 } while(wait->num>0);
3291 /* Mono is shutting down, so just wait for the end */
3292 if (!mono_runtime_try_shutdown ()) {
3293 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3294 mono_thread_suspend (mono_thread_internal_current ());
3295 mono_thread_execute_interruption ();
3299 * Remove everything but the finalizer thread and self.
3300 * Also abort all the background threads
3303 mono_threads_lock ();
3306 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3307 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3308 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3310 mono_threads_unlock ();
3312 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3313 if (wait->num > 0) {
3314 /* Something to wait for */
3315 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3317 } while (wait->num > 0);
3320 * give the subthreads a chance to really quit (this is mainly needed
3321 * to get correct user and system times from getrusage/wait/time(1)).
3322 * This could be removed if we avoid pthread_detach() and use pthread_join().
3324 mono_thread_info_yield ();
3328 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3330 MonoInternalThread *thread = (MonoInternalThread*)value;
3331 struct wait_data *wait = (struct wait_data*)user_data;
3334 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3336 * This needs no locking.
3338 if ((thread->state & ThreadState_Suspended) != 0 ||
3339 (thread->state & ThreadState_Stopped) != 0)
3342 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3343 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3344 wait->threads [wait->num] = thread;
3350 * mono_thread_suspend_all_other_threads:
3352 * Suspend all managed threads except the finalizer thread and this thread. It is
3353 * not possible to resume them later.
3355 void mono_thread_suspend_all_other_threads (void)
3357 struct wait_data wait_data;
3358 struct wait_data *wait = &wait_data;
3360 MonoNativeThreadId self = mono_native_thread_id_get ();
3361 guint32 eventidx = 0;
3362 gboolean starting, finished;
3364 memset (wait, 0, sizeof (struct wait_data));
3366 * The other threads could be in an arbitrary state at this point, i.e.
3367 * they could be starting up, shutting down etc. This means that there could be
3368 * threads which are not even in the threads hash table yet.
3372 * First we set a barrier which will be checked by all threads before they
3373 * are added to the threads hash table, and they will exit if the flag is set.
3374 * This ensures that no threads could be added to the hash later.
3375 * We will use shutting_down as the barrier for now.
3377 g_assert (shutting_down);
3380 * We make multiple calls to WaitForMultipleObjects since:
3381 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3382 * - some threads could exit without becoming suspended
3387 * Make a copy of the hashtable since we can't do anything with
3388 * threads while threads_mutex is held.
3391 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3392 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3393 mono_threads_lock ();
3394 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3395 mono_threads_unlock ();
3398 /* Get the suspended events that we'll be waiting for */
3399 for (i = 0; i < wait->num; ++i) {
3400 MonoInternalThread *thread = wait->threads [i];
3402 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3403 || mono_gc_is_finalizer_internal_thread (thread)
3404 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3406 mono_threads_close_thread_handle (wait->handles [i]);
3407 wait->threads [i] = NULL;
3411 LOCK_THREAD (thread);
3413 if ((thread->state & ThreadState_Suspended) != 0 ||
3414 (thread->state & ThreadState_StopRequested) != 0 ||
3415 (thread->state & ThreadState_Stopped) != 0) {
3416 UNLOCK_THREAD (thread);
3417 mono_threads_close_thread_handle (wait->handles [i]);
3418 wait->threads [i] = NULL;
3424 /* Convert abort requests into suspend requests */
3425 if ((thread->state & ThreadState_AbortRequested) != 0)
3426 thread->state &= ~ThreadState_AbortRequested;
3428 thread->state |= ThreadState_SuspendRequested;
3429 mono_os_event_reset (thread->suspended);
3431 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3432 async_suspend_internal (thread, TRUE);
3434 mono_threads_close_thread_handle (wait->handles [i]);
3435 wait->threads [i] = NULL;
3437 if (eventidx <= 0) {
3439 * If there are threads which are starting up, we wait until they
3440 * are suspended when they try to register in the threads hash.
3441 * This is guaranteed to finish, since the threads which can create new
3442 * threads get suspended after a while.
3443 * FIXME: The finalizer thread can still create new threads.
3445 mono_threads_lock ();
3446 if (threads_starting_up)
3447 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3450 mono_threads_unlock ();
3452 mono_thread_info_sleep (100, NULL);
3460 MonoInternalThread *thread;
3461 MonoStackFrameInfo *frames;
3462 int nframes, max_frames;
3463 int nthreads, max_threads;
3464 MonoInternalThread **threads;
3465 } ThreadDumpUserData;
3467 static gboolean thread_dump_requested;
3469 /* This needs to be async safe */
3471 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3473 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3475 if (ud->nframes < ud->max_frames) {
3476 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3483 /* This needs to be async safe */
3484 static SuspendThreadResult
3485 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3487 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3488 MonoInternalThread *thread = user_data->thread;
3491 /* This no longer works with remote unwinding */
3492 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3493 mono_thread_internal_describe (thread, text);
3494 g_string_append (text, "\n");
3497 if (thread == mono_thread_internal_current ())
3498 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3500 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3502 return MonoResumeThread;
3506 int nthreads, max_threads;
3507 MonoInternalThread **threads;
3508 } CollectThreadsUserData;
3511 collect_thread (gpointer key, gpointer value, gpointer user)
3513 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3514 MonoInternalThread *thread = (MonoInternalThread *)value;
3516 if (ud->nthreads < ud->max_threads)
3517 ud->threads [ud->nthreads ++] = thread;
3521 * Collect running threads into the THREADS array.
3522 * THREADS should be an array allocated on the stack.
3525 collect_threads (MonoInternalThread **thread_array, int max_threads)
3527 CollectThreadsUserData ud;
3529 memset (&ud, 0, sizeof (ud));
3530 /* This array contains refs, but its on the stack, so its ok */
3531 ud.threads = thread_array;
3532 ud.max_threads = max_threads;
3534 mono_threads_lock ();
3535 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3536 mono_threads_unlock ();
3542 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3544 GString* text = g_string_new (0);
3546 GError *error = NULL;
3549 ud->thread = thread;
3552 /* Collect frames for the thread */
3553 if (thread == mono_thread_internal_current ()) {
3554 get_thread_dump (mono_thread_info_current (), ud);
3556 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3560 * Do all the non async-safe work outside of get_thread_dump.
3563 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3565 g_string_append_printf (text, "\n\"%s\"", name);
3568 else if (thread->threadpool_thread) {
3569 g_string_append (text, "\n\"<threadpool thread>\"");
3571 g_string_append (text, "\n\"<unnamed thread>\"");
3574 for (i = 0; i < ud->nframes; ++i) {
3575 MonoStackFrameInfo *frame = &ud->frames [i];
3576 MonoMethod *method = NULL;
3578 if (frame->type == FRAME_TYPE_MANAGED)
3579 method = mono_jit_info_get_method (frame->ji);
3582 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3583 g_string_append_printf (text, " %s\n", location);
3586 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3590 fprintf (stdout, "%s", text->str);
3592 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3593 OutputDebugStringA(text->str);
3596 g_string_free (text, TRUE);
3601 mono_threads_perform_thread_dump (void)
3603 ThreadDumpUserData ud;
3604 MonoInternalThread *thread_array [128];
3605 int tindex, nthreads;
3607 if (!thread_dump_requested)
3610 printf ("Full thread dump:\n");
3612 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3613 nthreads = collect_threads (thread_array, 128);
3615 memset (&ud, 0, sizeof (ud));
3616 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3617 ud.max_frames = 256;
3619 for (tindex = 0; tindex < nthreads; ++tindex)
3620 dump_thread (thread_array [tindex], &ud);
3624 thread_dump_requested = FALSE;
3627 /* Obtain the thread dump of all threads */
3629 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3632 ThreadDumpUserData ud;
3633 MonoInternalThread *thread_array [128];
3634 MonoDomain *domain = mono_domain_get ();
3635 MonoDebugSourceLocation *location;
3636 int tindex, nthreads;
3640 *out_threads = NULL;
3641 *out_stack_frames = NULL;
3643 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3644 nthreads = collect_threads (thread_array, 128);
3646 memset (&ud, 0, sizeof (ud));
3647 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3648 ud.max_frames = 256;
3650 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3653 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3657 for (tindex = 0; tindex < nthreads; ++tindex) {
3658 MonoInternalThread *thread = thread_array [tindex];
3659 MonoArray *thread_frames;
3665 /* Collect frames for the thread */
3666 if (thread == mono_thread_internal_current ()) {
3667 get_thread_dump (mono_thread_info_current (), &ud);
3669 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3672 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3674 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3677 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3679 for (i = 0; i < ud.nframes; ++i) {
3680 MonoStackFrameInfo *frame = &ud.frames [i];
3681 MonoMethod *method = NULL;
3682 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3686 sf->native_offset = frame->native_offset;
3688 if (frame->type == FRAME_TYPE_MANAGED)
3689 method = mono_jit_info_get_method (frame->ji);
3692 sf->method_address = (gsize) frame->ji->code_start;
3694 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3697 MONO_OBJECT_SETREF (sf, method, rm);
3699 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3701 sf->il_offset = location->il_offset;
3703 if (location && location->source_file) {
3704 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3705 sf->line = location->row;
3706 sf->column = location->column;
3708 mono_debug_free_source_location (location);
3713 mono_array_setref (thread_frames, i, sf);
3719 return is_ok (error);
3723 * mono_threads_request_thread_dump:
3725 * Ask all threads except the current to print their stacktrace to stdout.
3728 mono_threads_request_thread_dump (void)
3730 /*The new thread dump code runs out of the finalizer thread. */
3731 thread_dump_requested = TRUE;
3732 mono_gc_finalize_notify ();
3737 gint allocated; /* +1 so that refs [allocated] == NULL */
3741 typedef struct ref_stack RefStack;
3744 ref_stack_new (gint initial_size)
3748 initial_size = MAX (initial_size, 16) + 1;
3749 rs = g_new0 (RefStack, 1);
3750 rs->refs = g_new0 (gpointer, initial_size);
3751 rs->allocated = initial_size;
3756 ref_stack_destroy (gpointer ptr)
3758 RefStack *rs = (RefStack *)ptr;
3767 ref_stack_push (RefStack *rs, gpointer ptr)
3769 g_assert (rs != NULL);
3771 if (rs->bottom >= rs->allocated) {
3772 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3773 rs->allocated <<= 1;
3774 rs->refs [rs->allocated] = NULL;
3776 rs->refs [rs->bottom++] = ptr;
3780 ref_stack_pop (RefStack *rs)
3782 if (rs == NULL || rs->bottom == 0)
3786 rs->refs [rs->bottom] = NULL;
3790 ref_stack_find (RefStack *rs, gpointer ptr)
3797 for (refs = rs->refs; refs && *refs; refs++) {
3805 * mono_thread_push_appdomain_ref:
3807 * Register that the current thread may have references to objects in domain
3808 * @domain on its stack. Each call to this function should be paired with a
3809 * call to pop_appdomain_ref.
3812 mono_thread_push_appdomain_ref (MonoDomain *domain)
3814 MonoInternalThread *thread = mono_thread_internal_current ();
3817 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3818 SPIN_LOCK (thread->lock_thread_id);
3819 if (thread->appdomain_refs == NULL)
3820 thread->appdomain_refs = ref_stack_new (16);
3821 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3822 SPIN_UNLOCK (thread->lock_thread_id);
3827 mono_thread_pop_appdomain_ref (void)
3829 MonoInternalThread *thread = mono_thread_internal_current ();
3832 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3833 SPIN_LOCK (thread->lock_thread_id);
3834 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3835 SPIN_UNLOCK (thread->lock_thread_id);
3840 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3843 SPIN_LOCK (thread->lock_thread_id);
3844 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3845 SPIN_UNLOCK (thread->lock_thread_id);
3850 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3852 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3855 typedef struct abort_appdomain_data {
3856 struct wait_data wait;
3858 } abort_appdomain_data;
3861 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3863 MonoInternalThread *thread = (MonoInternalThread*)value;
3864 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3865 MonoDomain *domain = data->domain;
3867 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3868 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3870 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3871 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3872 data->wait.threads [data->wait.num] = thread;
3875 /* Just ignore the rest, we can't do anything with
3883 * mono_threads_abort_appdomain_threads:
3885 * Abort threads which has references to the given appdomain.
3888 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3890 #ifdef __native_client__
3894 abort_appdomain_data user_data;
3896 int orig_timeout = timeout;
3899 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3901 start_time = mono_msec_ticks ();
3903 mono_threads_lock ();
3905 user_data.domain = domain;
3906 user_data.wait.num = 0;
3907 /* This shouldn't take any locks */
3908 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3909 mono_threads_unlock ();
3911 if (user_data.wait.num > 0) {
3912 /* Abort the threads outside the threads lock */
3913 for (i = 0; i < user_data.wait.num; ++i)
3914 mono_thread_internal_abort (user_data.wait.threads [i]);
3917 * We should wait for the threads either to abort, or to leave the
3918 * domain. We can't do the latter, so we wait with a timeout.
3920 wait_for_tids (&user_data.wait, 100, FALSE);
3923 /* Update remaining time */
3924 timeout -= mono_msec_ticks () - start_time;
3925 start_time = mono_msec_ticks ();
3927 if (orig_timeout != -1 && timeout < 0)
3930 while (user_data.wait.num > 0);
3932 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3938 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3940 MonoInternalThread *thread = (MonoInternalThread*)value;
3941 MonoDomain *domain = (MonoDomain*)user_data;
3944 /* No locking needed here */
3945 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3947 if (thread->cached_culture_info) {
3948 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3949 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3950 if (obj && obj->vtable->domain == domain)
3951 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3957 * mono_threads_clear_cached_culture:
3959 * Clear the cached_current_culture from all threads if it is in the
3963 mono_threads_clear_cached_culture (MonoDomain *domain)
3965 mono_threads_lock ();
3966 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3967 mono_threads_unlock ();
3971 * mono_thread_get_undeniable_exception:
3973 * Return an exception which needs to be raised when leaving a catch clause.
3974 * This is used for undeniable exception propagation.
3977 mono_thread_get_undeniable_exception (void)
3979 MonoInternalThread *thread = mono_thread_internal_current ();
3981 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3984 // We don't want to have our exception effect calls made by
3985 // the catching block
3987 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3991 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3992 * exception if the thread no longer references a dying appdomain.
3994 thread->abort_exc->trace_ips = NULL;
3995 thread->abort_exc->stack_trace = NULL;
3996 return thread->abort_exc;
3999 #if MONO_SMALL_CONFIG
4000 #define NUM_STATIC_DATA_IDX 4
4001 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4005 #define NUM_STATIC_DATA_IDX 8
4006 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4007 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
4011 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4012 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4015 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4017 gpointer *static_data = (gpointer *)addr;
4019 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4020 void **ptr = (void **)static_data [i];
4025 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4026 void **p = ptr + idx;
4029 mark_func ((MonoObject**)p, gc_data);
4035 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4037 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4041 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4043 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4047 * mono_alloc_static_data
4049 * Allocate memory blocks for storing threads or context static data
4052 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4054 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4057 gpointer* static_data = *static_data_ptr;
4059 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4060 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4062 if (mono_gc_user_markers_supported ()) {
4063 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4064 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4066 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4067 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4070 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4071 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4072 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4073 *static_data_ptr = static_data;
4074 static_data [0] = static_data;
4077 for (i = 1; i <= idx; ++i) {
4078 if (static_data [i])
4081 if (mono_gc_user_markers_supported ())
4082 static_data [i] = g_malloc0 (static_data_size [i]);
4084 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4085 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4086 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4091 mono_free_static_data (gpointer* static_data)
4094 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4095 gpointer p = static_data [i];
4099 * At this point, the static data pointer array is still registered with the
4100 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4101 * data. Freeing the individual arrays without first nulling their slots
4102 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4103 * such an already freed array. See bug #13813.
4105 static_data [i] = NULL;
4106 mono_memory_write_barrier ();
4107 if (mono_gc_user_markers_supported ())
4110 mono_gc_free_fixed (p);
4112 mono_gc_free_fixed (static_data);
4116 * mono_init_static_data_info
4118 * Initializes static data counters
4120 static void mono_init_static_data_info (StaticDataInfo *static_data)
4122 static_data->idx = 0;
4123 static_data->offset = 0;
4124 static_data->freelist = NULL;
4128 * mono_alloc_static_data_slot
4130 * Generates an offset for static data. static_data contains the counters
4131 * used to generate it.
4134 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4136 if (!static_data->idx && !static_data->offset) {
4138 * we use the first chunk of the first allocation also as
4139 * an array for the rest of the data
4141 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4143 static_data->offset += align - 1;
4144 static_data->offset &= ~(align - 1);
4145 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4146 static_data->idx ++;
4147 g_assert (size <= static_data_size [static_data->idx]);
4148 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4149 static_data->offset = 0;
4151 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4152 static_data->offset += size;
4157 * LOCKING: requires that threads_mutex is held
4160 context_adjust_static_data (MonoAppContext *ctx)
4162 if (context_static_info.offset || context_static_info.idx > 0) {
4163 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4164 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4165 ctx->data->static_data = ctx->static_data;
4170 * LOCKING: requires that threads_mutex is held
4173 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4175 MonoInternalThread *thread = (MonoInternalThread *)value;
4176 guint32 offset = GPOINTER_TO_UINT (user);
4178 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4182 * LOCKING: requires that threads_mutex is held
4185 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4187 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4192 guint32 offset = GPOINTER_TO_UINT (user);
4193 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4194 ctx->data->static_data = ctx->static_data;
4197 static StaticDataFreeList*
4198 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4200 StaticDataFreeList* prev = NULL;
4201 StaticDataFreeList* tmp = static_data->freelist;
4203 if (tmp->size == size) {
4205 prev->next = tmp->next;
4207 static_data->freelist = tmp->next;
4216 #if SIZEOF_VOID_P == 4
4223 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4225 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4227 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4228 MonoBitSet *rb = sets [idx];
4229 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4230 offset /= sizeof (uintptr_t);
4231 /* offset is now the bitmap offset */
4232 for (int i = 0; i < numbits; ++i) {
4233 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4234 mono_bitset_set_fast (rb, offset + i);
4239 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4241 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4242 MonoBitSet *rb = sets [idx];
4243 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4244 offset /= sizeof (uintptr_t);
4245 /* offset is now the bitmap offset */
4246 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4247 mono_bitset_clear_fast (rb, offset + i);
4251 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4253 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4255 StaticDataInfo *info;
4258 if (static_type == SPECIAL_STATIC_THREAD) {
4259 info = &thread_static_info;
4260 sets = thread_reference_bitmaps;
4262 info = &context_static_info;
4263 sets = context_reference_bitmaps;
4266 mono_threads_lock ();
4268 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4272 offset = item->offset;
4275 offset = mono_alloc_static_data_slot (info, size, align);
4278 update_reference_bitmap (sets, offset, bitmap, numbits);
4280 if (static_type == SPECIAL_STATIC_THREAD) {
4281 /* This can be called during startup */
4282 if (threads != NULL)
4283 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4285 if (contexts != NULL)
4286 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4288 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4291 mono_threads_unlock ();
4297 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4299 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4301 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4302 return get_thread_static_data (thread, offset);
4304 return get_context_static_data (thread->current_appcontext, offset);
4309 mono_get_special_static_data (guint32 offset)
4311 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4320 * LOCKING: requires that threads_mutex is held
4323 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4325 MonoInternalThread *thread = (MonoInternalThread *)value;
4326 OffsetSize *data = (OffsetSize *)user;
4327 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4328 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4331 if (!thread->static_data || !thread->static_data [idx])
4333 ptr = ((char*) thread->static_data [idx]) + off;
4334 mono_gc_bzero_atomic (ptr, data->size);
4338 * LOCKING: requires that threads_mutex is held
4341 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4343 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4348 OffsetSize *data = (OffsetSize *)user;
4349 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4350 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4353 if (!ctx->static_data || !ctx->static_data [idx])
4356 ptr = ((char*) ctx->static_data [idx]) + off;
4357 mono_gc_bzero_atomic (ptr, data->size);
4361 do_free_special_slot (guint32 offset, guint32 size)
4363 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4365 StaticDataInfo *info;
4367 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4368 info = &thread_static_info;
4369 sets = thread_reference_bitmaps;
4371 info = &context_static_info;
4372 sets = context_reference_bitmaps;
4375 guint32 data_offset = offset;
4376 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4377 OffsetSize data = { data_offset, size };
4379 clear_reference_bitmap (sets, data.offset, data.size);
4381 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4382 if (threads != NULL)
4383 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4385 if (contexts != NULL)
4386 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4389 if (!mono_runtime_is_shutting_down ()) {
4390 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4392 item->offset = offset;
4395 item->next = info->freelist;
4396 info->freelist = item;
4401 do_free_special (gpointer key, gpointer value, gpointer data)
4403 MonoClassField *field = (MonoClassField *)key;
4404 guint32 offset = GPOINTER_TO_UINT (value);
4407 size = mono_type_size (field->type, &align);
4408 do_free_special_slot (offset, size);
4412 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4414 mono_threads_lock ();
4416 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4418 mono_threads_unlock ();
4422 static void CALLBACK dummy_apc (ULONG_PTR param)
4428 * mono_thread_execute_interruption
4430 * Performs the operation that the requested thread state requires (abort,
4433 static MonoException*
4434 mono_thread_execute_interruption (void)
4436 MonoInternalThread *thread = mono_thread_internal_current ();
4437 MonoThread *sys_thread = mono_thread_current ();
4439 LOCK_THREAD (thread);
4441 /* MonoThread::interruption_requested can only be changed with atomics */
4442 if (mono_thread_clear_interruption_requested (thread)) {
4443 /* this will consume pending APC calls */
4445 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4447 InterlockedDecrement (&thread_interruption_requested);
4449 /* Clear the interrupted flag of the thread so it can wait again */
4450 mono_thread_info_clear_self_interrupt ();
4453 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4454 if (sys_thread->pending_exception) {
4457 exc = sys_thread->pending_exception;
4458 sys_thread->pending_exception = NULL;
4460 UNLOCK_THREAD (thread);
4462 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4463 UNLOCK_THREAD (thread);
4464 g_assert (sys_thread->pending_exception == NULL);
4465 if (thread->abort_exc == NULL) {
4467 * This might be racy, but it has to be called outside the lock
4468 * since it calls managed code.
4470 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4472 return thread->abort_exc;
4474 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4475 /* calls UNLOCK_THREAD (thread) */
4476 self_suspend_internal ();
4479 else if ((thread->state & ThreadState_StopRequested) != 0) {
4480 /* FIXME: do this through the JIT? */
4482 UNLOCK_THREAD (thread);
4484 mono_thread_exit ();
4486 } else if (thread->thread_interrupt_requested) {
4488 thread->thread_interrupt_requested = FALSE;
4489 UNLOCK_THREAD (thread);
4491 return(mono_get_exception_thread_interrupted ());
4494 UNLOCK_THREAD (thread);
4500 * mono_thread_request_interruption
4502 * A signal handler can call this method to request the interruption of a
4503 * thread. The result of the interruption will depend on the current state of
4504 * the thread. If the result is an exception that needs to be throw, it is
4505 * provided as return value.
4508 mono_thread_request_interruption (gboolean running_managed)
4510 MonoInternalThread *thread = mono_thread_internal_current ();
4512 /* The thread may already be stopping */
4517 if (thread->interrupt_on_stop &&
4518 thread->state & ThreadState_StopRequested &&
4519 thread->state & ThreadState_Background)
4522 if (!mono_thread_set_interruption_requested (thread))
4524 InterlockedIncrement (&thread_interruption_requested);
4526 if (!running_managed || is_running_protected_wrapper ()) {
4527 /* Can't stop while in unmanaged code. Increase the global interruption
4528 request count. When exiting the unmanaged method the count will be
4529 checked and the thread will be interrupted. */
4531 /* this will awake the thread if it is in WaitForSingleObject
4533 /* Our implementation of this function ignores the func argument */
4535 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4537 mono_thread_info_self_interrupt ();
4542 return mono_thread_execute_interruption ();
4546 /*This function should be called by a thread after it has exited all of
4547 * its handle blocks at interruption time.*/
4549 mono_thread_resume_interruption (void)
4551 MonoInternalThread *thread = mono_thread_internal_current ();
4552 gboolean still_aborting;
4554 /* The thread may already be stopping */
4558 LOCK_THREAD (thread);
4559 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4560 UNLOCK_THREAD (thread);
4562 /*This can happen if the protected block called Thread::ResetAbort*/
4563 if (!still_aborting)
4566 if (!mono_thread_set_interruption_requested (thread))
4568 InterlockedIncrement (&thread_interruption_requested);
4570 mono_thread_info_self_interrupt ();
4572 return mono_thread_execute_interruption ();
4575 gboolean mono_thread_interruption_requested ()
4577 if (thread_interruption_requested) {
4578 MonoInternalThread *thread = mono_thread_internal_current ();
4579 /* The thread may already be stopping */
4581 return mono_thread_get_interruption_requested (thread);
4586 static MonoException*
4587 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4589 MonoInternalThread *thread = mono_thread_internal_current ();
4591 /* The thread may already be stopping */
4594 if (!mono_thread_get_interruption_requested (thread))
4596 if (!bypass_abort_protection && is_running_protected_wrapper ())
4599 return mono_thread_execute_interruption ();
4603 * Performs the interruption of the current thread, if one has been requested,
4604 * and the thread is not running a protected wrapper.
4605 * Return the exception which needs to be thrown, if any.
4608 mono_thread_interruption_checkpoint (void)
4610 return mono_thread_interruption_checkpoint_request (FALSE);
4614 * Performs the interruption of the current thread, if one has been requested.
4615 * Return the exception which needs to be thrown, if any.
4618 mono_thread_force_interruption_checkpoint_noraise (void)
4620 return mono_thread_interruption_checkpoint_request (TRUE);
4624 * mono_set_pending_exception:
4626 * Set the pending exception of the current thread to EXC.
4627 * The exception will be thrown when execution returns to managed code.
4630 mono_set_pending_exception (MonoException *exc)
4632 MonoThread *thread = mono_thread_current ();
4634 /* The thread may already be stopping */
4638 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4640 mono_thread_request_interruption (FALSE);
4644 * mono_thread_interruption_request_flag:
4646 * Returns the address of a flag that will be non-zero if an interruption has
4647 * been requested for a thread. The thread to interrupt may not be the current
4648 * thread, so an additional call to mono_thread_interruption_requested() or
4649 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4652 gint32* mono_thread_interruption_request_flag ()
4654 return &thread_interruption_requested;
4658 mono_thread_init_apartment_state (void)
4661 MonoInternalThread* thread = mono_thread_internal_current ();
4663 /* Positive return value indicates success, either
4664 * S_OK if this is first CoInitialize call, or
4665 * S_FALSE if CoInitialize already called, but with same
4666 * threading model. A negative value indicates failure,
4667 * probably due to trying to change the threading model.
4669 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4670 ? COINIT_APARTMENTTHREADED
4671 : COINIT_MULTITHREADED) < 0) {
4672 thread->apartment_state = ThreadApartmentState_Unknown;
4678 mono_thread_cleanup_apartment_state (void)
4681 MonoInternalThread* thread = mono_thread_internal_current ();
4683 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4690 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4692 LOCK_THREAD (thread);
4693 thread->state |= state;
4694 UNLOCK_THREAD (thread);
4698 * mono_thread_test_and_set_state:
4700 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4702 * Returns TRUE is @set was OR'd in.
4705 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4707 LOCK_THREAD (thread);
4709 if ((thread->state & test) != 0) {
4710 UNLOCK_THREAD (thread);
4714 thread->state |= set;
4715 UNLOCK_THREAD (thread);
4721 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4723 LOCK_THREAD (thread);
4724 thread->state &= ~state;
4725 UNLOCK_THREAD (thread);
4729 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4731 gboolean ret = FALSE;
4733 LOCK_THREAD (thread);
4735 if ((thread->state & test) != 0) {
4739 UNLOCK_THREAD (thread);
4745 self_interrupt_thread (void *_unused)
4748 MonoThreadInfo *info;
4750 exc = mono_thread_execute_interruption ();
4752 if (mono_threads_is_coop_enabled ()) {
4753 /* We can return from an async call in coop, as
4754 * it's simply called when exiting the safepoint */
4758 g_error ("%s: we can't resume from an async call", __func__);
4761 info = mono_thread_info_current ();
4763 /* We must use _with_context since we didn't trampoline into the runtime */
4764 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. */
4768 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4772 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4776 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4778 MonoJitInfo **dest = (MonoJitInfo **)data;
4784 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4786 MonoJitInfo *ji = NULL;
4791 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4792 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4793 * where we hold runtime locks.
4795 if (!mono_threads_is_coop_enabled ())
4796 mono_thread_info_set_is_async_context (TRUE);
4797 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4798 if (!mono_threads_is_coop_enabled ())
4799 mono_thread_info_set_is_async_context (FALSE);
4804 MonoInternalThread *thread;
4805 gboolean install_async_abort;
4806 MonoThreadInfoInterruptToken *interrupt_token;
4809 static SuspendThreadResult
4810 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4812 AbortThreadData *data = (AbortThreadData *)ud;
4813 MonoInternalThread *thread = data->thread;
4814 MonoJitInfo *ji = NULL;
4815 gboolean protected_wrapper;
4816 gboolean running_managed;
4818 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4819 return MonoResumeThread;
4821 /*someone is already interrupting it*/
4822 if (!mono_thread_set_interruption_requested (thread))
4823 return MonoResumeThread;
4825 InterlockedIncrement (&thread_interruption_requested);
4827 ji = mono_thread_info_get_last_managed (info);
4828 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4829 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4831 if (!protected_wrapper && running_managed) {
4832 /*We are in managed code*/
4833 /*Set the thread to call */
4834 if (data->install_async_abort)
4835 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4836 return MonoResumeThread;
4839 * This will cause waits to be broken.
4840 * It will also prevent the thread from entering a wait, so if the thread returns
4841 * from the wait before it receives the abort signal, it will just spin in the wait
4842 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4845 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4847 return MonoResumeThread;
4852 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4854 AbortThreadData data;
4856 g_assert (thread != mono_thread_internal_current ());
4858 data.thread = thread;
4859 data.install_async_abort = install_async_abort;
4860 data.interrupt_token = NULL;
4862 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4863 if (data.interrupt_token)
4864 mono_thread_info_finish_interrupt (data.interrupt_token);
4865 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4869 self_abort_internal (MonoError *error)
4875 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4876 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4879 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.
4881 exc = mono_thread_request_interruption (TRUE);
4883 mono_error_set_exception_instance (error, exc);
4885 mono_thread_info_self_interrupt ();
4889 MonoInternalThread *thread;
4891 MonoThreadInfoInterruptToken *interrupt_token;
4892 } SuspendThreadData;
4894 static SuspendThreadResult
4895 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4897 SuspendThreadData *data = (SuspendThreadData *)ud;
4898 MonoInternalThread *thread = data->thread;
4899 MonoJitInfo *ji = NULL;
4900 gboolean protected_wrapper;
4901 gboolean running_managed;
4903 ji = mono_thread_info_get_last_managed (info);
4904 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4905 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4907 if (running_managed && !protected_wrapper) {
4908 if (mono_threads_is_coop_enabled ()) {
4909 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4910 return MonoResumeThread;
4912 thread->state &= ~ThreadState_SuspendRequested;
4913 thread->state |= ThreadState_Suspended;
4914 return KeepSuspended;
4917 if (mono_thread_set_interruption_requested (thread))
4918 InterlockedIncrement (&thread_interruption_requested);
4919 if (data->interrupt)
4920 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4922 return MonoResumeThread;
4926 /* LOCKING: called with @thread synch_cs held, and releases it */
4928 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4930 SuspendThreadData data;
4932 g_assert (thread != mono_thread_internal_current ());
4934 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4936 thread->self_suspended = FALSE;
4938 data.thread = thread;
4939 data.interrupt = interrupt;
4940 data.interrupt_token = NULL;
4942 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4943 if (data.interrupt_token)
4944 mono_thread_info_finish_interrupt (data.interrupt_token);
4946 UNLOCK_THREAD (thread);
4949 /* LOCKING: called with @thread synch_cs held, and releases it */
4951 self_suspend_internal (void)
4953 MonoInternalThread *thread;
4955 MonoOSEventWaitRet res;
4957 thread = mono_thread_internal_current ();
4959 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4961 thread->self_suspended = TRUE;
4963 thread->state &= ~ThreadState_SuspendRequested;
4964 thread->state |= ThreadState_Suspended;
4966 UNLOCK_THREAD (thread);
4968 event = thread->suspended;
4971 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4972 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4977 suspend_for_shutdown_async_call (gpointer unused)
4980 mono_thread_info_yield ();
4983 static SuspendThreadResult
4984 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4986 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4987 return MonoResumeThread;
4991 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4993 g_assert (thread != mono_thread_internal_current ());
4995 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4999 * mono_thread_is_foreign:
5000 * @thread: the thread to query
5002 * This function allows one to determine if a thread was created by the mono runtime and has
5003 * a well defined lifecycle or it's a foreigh one, created by the native environment.
5005 * Returns: TRUE if @thread was not created by the runtime.
5008 mono_thread_is_foreign (MonoThread *thread)
5010 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
5011 return info->runtime_thread == FALSE;
5015 * mono_add_joinable_thread:
5017 * Add TID to the list of joinable threads.
5018 * LOCKING: Acquires the threads lock.
5021 mono_threads_add_joinable_thread (gpointer tid)
5025 * We cannot detach from threads because it causes problems like
5026 * 2fd16f60/r114307. So we collect them and join them when
5027 * we have time (in he finalizer thread).
5029 joinable_threads_lock ();
5030 if (!joinable_threads)
5031 joinable_threads = g_hash_table_new (NULL, NULL);
5032 g_hash_table_insert (joinable_threads, tid, tid);
5033 joinable_thread_count ++;
5034 joinable_threads_unlock ();
5036 mono_gc_finalize_notify ();
5041 * mono_threads_join_threads:
5043 * Join all joinable threads. This is called from the finalizer thread.
5044 * LOCKING: Acquires the threads lock.
5047 mono_threads_join_threads (void)
5050 GHashTableIter iter;
5057 if (!joinable_thread_count)
5061 joinable_threads_lock ();
5063 if (g_hash_table_size (joinable_threads)) {
5064 g_hash_table_iter_init (&iter, joinable_threads);
5065 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5066 thread = (pthread_t)tid;
5067 g_hash_table_remove (joinable_threads, key);
5068 joinable_thread_count --;
5071 joinable_threads_unlock ();
5073 if (thread != pthread_self ()) {
5075 /* This shouldn't block */
5076 mono_threads_join_lock ();
5077 mono_native_thread_join (thread);
5078 mono_threads_join_unlock ();
5091 * Wait for thread TID to exit.
5092 * LOCKING: Acquires the threads lock.
5095 mono_thread_join (gpointer tid)
5099 gboolean found = FALSE;
5101 joinable_threads_lock ();
5102 if (!joinable_threads)
5103 joinable_threads = g_hash_table_new (NULL, NULL);
5104 if (g_hash_table_lookup (joinable_threads, tid)) {
5105 g_hash_table_remove (joinable_threads, tid);
5106 joinable_thread_count --;
5109 joinable_threads_unlock ();
5112 thread = (pthread_t)tid;
5114 mono_native_thread_join (thread);
5120 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5122 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5123 mono_thread_interruption_checkpoint ();
5127 mono_thread_internal_unhandled_exception (MonoObject* exc)
5129 MonoClass *klass = exc->vtable->klass;
5130 if (is_threadabort_exception (klass)) {
5131 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5132 } else if (!is_appdomainunloaded_exception (klass)
5133 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5134 mono_unhandled_exception (exc);
5135 if (mono_environment_exitcode_get () == 1) {
5136 mono_environment_exitcode_set (255);
5137 mono_invoke_unhandled_exception_hook (exc);
5138 g_assert_not_reached ();
5144 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5147 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5148 mono_error_set_pending_exception (&error);
5152 * mono_threads_attach_coop: called by native->managed wrappers
5156 * - @return: the original domain which needs to be restored, or NULL.
5159 * - @dummy: contains the original domain
5160 * - @return: a cookie containing current MonoThreadInfo*.
5163 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5166 gboolean fresh_thread = FALSE;
5169 /* Happens when called from AOTed code which is only used in the root domain. */
5170 domain = mono_get_root_domain ();
5175 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5176 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5177 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5178 * we're only responsible for making the cookie. */
5179 if (mono_threads_is_coop_enabled ()) {
5180 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5181 fresh_thread = !info || !mono_thread_info_is_live (info);
5184 if (!mono_thread_internal_current ()) {
5185 mono_thread_attach_full (domain, FALSE);
5188 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5191 orig = mono_domain_get ();
5193 mono_domain_set (domain, TRUE);
5195 if (!mono_threads_is_coop_enabled ())
5196 return orig != domain ? orig : NULL;
5200 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5201 * return the right cookie. */
5202 return mono_threads_enter_gc_unsafe_region_cookie ();
5205 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5206 return mono_threads_enter_gc_unsafe_region (dummy);
5211 * mono_threads_detach_coop: called by native->managed wrappers
5214 * - @cookie: the original domain which needs to be restored, or NULL.
5218 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5219 * - @dummy: contains the original domain
5222 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5224 MonoDomain *domain, *orig;
5226 if (!mono_threads_is_coop_enabled ()) {
5227 orig = (MonoDomain*) cookie;
5229 mono_domain_set (orig, TRUE);
5231 orig = (MonoDomain*) *dummy;
5233 domain = mono_domain_get ();
5236 /* it won't do anything if cookie is NULL
5237 * thread state RUNNING -> (RUNNING|BLOCKING) */
5238 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5240 if (orig != domain) {
5242 mono_domain_unset ();
5244 mono_domain_set (orig, TRUE);
5250 mono_thread_try_resume_interruption (void)
5252 MonoInternalThread *thread;
5254 thread = mono_thread_internal_current ();
5255 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
5257 if (mono_thread_get_abort_prot_block_count (thread) > 0 || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5260 return mono_thread_resume_interruption ();
5264 /* Returns TRUE if the current thread is ready to be interrupted. */
5266 mono_threads_is_ready_to_be_interrupted (void)
5268 MonoInternalThread *thread;
5270 thread = mono_thread_internal_current ();
5271 LOCK_THREAD (thread);
5272 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5273 UNLOCK_THREAD (thread);
5277 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5278 UNLOCK_THREAD (thread);
5282 UNLOCK_THREAD (thread);
5288 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5290 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5292 if (internal->thread_info) {
5293 g_string_append (text, ", state : ");
5294 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5297 if (internal->owned_mutexes) {
5300 g_string_append (text, ", owns : [");
5301 for (i = 0; i < internal->owned_mutexes->len; i++)
5302 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5303 g_string_append (text, "]");
5308 mono_thread_internal_is_current (MonoInternalThread *internal)
5310 g_assert (internal);
5311 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));