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)
19 #if defined(__OpenBSD__)
21 #include <pthread_np.h>
24 #include <mono/metadata/object.h>
25 #include <mono/metadata/domain-internals.h>
26 #include <mono/metadata/profiler-private.h>
27 #include <mono/metadata/threads.h>
28 #include <mono/metadata/threadpool.h>
29 #include <mono/metadata/threads-types.h>
30 #include <mono/metadata/exception.h>
31 #include <mono/metadata/environment.h>
32 #include <mono/metadata/monitor.h>
33 #include <mono/metadata/gc-internal.h>
34 #include <mono/metadata/marshal.h>
35 #include <mono/io-layer/io-layer.h>
37 #include <mono/io-layer/threads.h>
39 #include <mono/metadata/object-internals.h>
40 #include <mono/metadata/mono-debug-debugger.h>
41 #include <mono/utils/mono-compiler.h>
42 #include <mono/utils/mono-mmap.h>
43 #include <mono/utils/mono-membar.h>
44 #include <mono/utils/mono-time.h>
46 #include <mono/metadata/gc-internal.h>
48 #ifdef PLATFORM_ANDROID
51 extern int tkill (pid_t tid, int signal);
54 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
55 #define THREAD_DEBUG(a)
56 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
57 #define THREAD_WAIT_DEBUG(a)
58 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
59 #define LIBGC_DEBUG(a)
61 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
62 #define SPIN_LOCK(i) do { \
63 if (SPIN_TRYLOCK (i)) \
67 #define SPIN_UNLOCK(i) i = 0
69 /* Provide this for systems with glib < 2.6 */
70 #ifndef G_GSIZE_FORMAT
71 # if GLIB_SIZEOF_LONG == 8
72 # define G_GSIZE_FORMAT "lu"
74 # define G_GSIZE_FORMAT "u"
80 guint32 (*func)(void *);
96 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
97 struct _MonoThreadDomainTls {
98 MonoThreadDomainTls *next;
106 MonoThreadDomainTls *freelist;
111 MonoHazardousFreeFunc free_func;
114 /* Number of cached culture objects in the MonoThread->cached_culture_info array
115 * (per-type): we use the first NUM entries for CultureInfo and the last for
116 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
118 #define NUM_CACHED_CULTURES 4
119 #define CULTURES_START_IDX 0
120 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
122 /* Controls access to the 'threads' hash table */
123 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
124 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
125 static CRITICAL_SECTION threads_mutex;
127 /* Controls access to context static data */
128 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
129 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
130 static CRITICAL_SECTION contexts_mutex;
132 /* Holds current status of static data heap */
133 static StaticDataInfo thread_static_info;
134 static StaticDataInfo context_static_info;
136 /* The hash of existing threads (key is thread ID, value is
137 * MonoInternalThread*) that need joining before exit
139 static MonoGHashTable *threads=NULL;
142 * Threads which are starting up and they are not in the 'threads' hash yet.
143 * When handle_store is called for a thread, it will be removed from this hash table.
144 * Protected by mono_threads_lock ().
146 static MonoGHashTable *threads_starting_up = NULL;
148 /* Maps a MonoThread to its start argument */
149 /* Protected by mono_threads_lock () */
150 static MonoGHashTable *thread_start_args = NULL;
152 /* The TLS key that holds the MonoObject assigned to each thread */
153 static guint32 current_object_key = -1;
155 #ifdef MONO_HAVE_FAST_TLS
156 /* we need to use both the Tls* functions and __thread because
157 * the gc needs to see all the threads
159 MONO_FAST_TLS_DECLARE(tls_current_object);
160 #define SET_CURRENT_OBJECT(x) do { \
161 MONO_FAST_TLS_SET (tls_current_object, x); \
162 TlsSetValue (current_object_key, x); \
164 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
166 #define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x)
167 #define GET_CURRENT_OBJECT() (MonoInternalThread*) TlsGetValue (current_object_key)
170 /* function called at thread start */
171 static MonoThreadStartCB mono_thread_start_cb = NULL;
173 /* function called at thread attach */
174 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
176 /* function called at thread cleanup */
177 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
179 /* function called to notify the runtime about a pending exception on the current thread */
180 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
182 /* The default stack size for each thread */
183 static guint32 default_stacksize = 0;
184 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
186 static void thread_adjust_static_data (MonoInternalThread *thread);
187 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
188 static void mono_init_static_data_info (StaticDataInfo *static_data);
189 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
190 static gboolean mono_thread_resume (MonoInternalThread* thread);
191 static void mono_thread_start (MonoThread *thread);
192 static void signal_thread_state_change (MonoInternalThread *thread);
194 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
196 /* Spin lock for InterlockedXXX 64 bit functions */
197 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
198 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
199 static CRITICAL_SECTION interlocked_mutex;
201 /* global count of thread interruptions requested */
202 static gint32 thread_interruption_requested = 0;
204 /* Event signaled when a thread changes its background mode */
205 static HANDLE background_change_event;
207 /* The table for small ID assignment */
208 static CRITICAL_SECTION small_id_mutex;
209 static int small_id_table_size = 0;
210 static int small_id_next = 0;
211 static int highest_small_id = -1;
212 static MonoInternalThread **small_id_table = NULL;
214 /* The hazard table */
215 #if MONO_SMALL_CONFIG
216 #define HAZARD_TABLE_MAX_SIZE 256
218 #define HAZARD_TABLE_MAX_SIZE 16384 /* There cannot be more threads than this number. */
220 static volatile int hazard_table_size = 0;
221 static MonoThreadHazardPointers * volatile hazard_table = NULL;
223 /* The table where we keep pointers to blocks to be freed but that
224 have to wait because they're guarded by a hazard pointer. */
225 static CRITICAL_SECTION delayed_free_table_mutex;
226 static GArray *delayed_free_table = NULL;
228 static gboolean shutting_down = FALSE;
231 mono_thread_get_tls_key (void)
233 return current_object_key;
237 mono_thread_get_tls_offset (void)
240 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
244 /* handle_store() and handle_remove() manage the array of threads that
245 * still need to be waited for when the main thread exits.
247 * If handle_store() returns FALSE the thread must not be started
248 * because Mono is shutting down.
250 static gboolean handle_store(MonoThread *thread)
252 mono_threads_lock ();
254 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
256 if (threads_starting_up)
257 mono_g_hash_table_remove (threads_starting_up, thread);
260 mono_threads_unlock ();
265 MONO_GC_REGISTER_ROOT_FIXED (threads);
266 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
269 /* We don't need to duplicate thread->handle, because it is
270 * only closed when the thread object is finalized by the GC.
272 g_assert (thread->internal_thread);
273 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
274 thread->internal_thread);
276 mono_threads_unlock ();
281 static gboolean handle_remove(MonoInternalThread *thread)
284 gsize tid = thread->tid;
286 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
288 mono_threads_lock ();
291 /* We have to check whether the thread object for the
292 * tid is still the same in the table because the
293 * thread might have been destroyed and the tid reused
294 * in the meantime, in which case the tid would be in
295 * the table, but with another thread object.
297 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
298 mono_g_hash_table_remove (threads, (gpointer)tid);
307 mono_threads_unlock ();
309 /* Don't close the handle here, wait for the object finalizer
310 * to do it. Otherwise, the following race condition applies:
312 * 1) Thread exits (and handle_remove() closes the handle)
314 * 2) Some other handle is reassigned the same slot
316 * 3) Another thread tries to join the first thread, and
317 * blocks waiting for the reassigned handle to be signalled
318 * (which might never happen). This is possible, because the
319 * thread calling Join() still has a reference to the first
326 * Allocate a small thread id.
328 * FIXME: The biggest part of this function is very similar to
329 * domain_id_alloc() in domain.c and should be merged.
332 small_id_alloc (MonoInternalThread *thread)
336 EnterCriticalSection (&small_id_mutex);
338 if (!small_id_table) {
339 small_id_table_size = 2;
341 * Enabling this causes problems, because SGEN doesn't track/update the TLS slot holding
342 * the current thread.
344 //small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoInternalThread*), mono_gc_make_root_descr_all_refs (small_id_table_size));
345 small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoInternalThread*), NULL);
347 for (i = small_id_next; i < small_id_table_size; ++i) {
348 if (!small_id_table [i]) {
354 for (i = 0; i < small_id_next; ++i) {
355 if (!small_id_table [i]) {
362 MonoInternalThread **new_table;
363 int new_size = small_id_table_size * 2;
364 if (new_size >= (1 << 16))
365 g_assert_not_reached ();
366 id = small_id_table_size;
367 //new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoInternalThread*), mono_gc_make_root_descr_all_refs (new_size));
368 new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoInternalThread*), NULL);
369 memcpy (new_table, small_id_table, small_id_table_size * sizeof (void*));
370 mono_gc_free_fixed (small_id_table);
371 small_id_table = new_table;
372 small_id_table_size = new_size;
374 thread->small_id = id;
375 g_assert (small_id_table [id] == NULL);
376 small_id_table [id] = thread;
378 if (small_id_next > small_id_table_size)
381 g_assert (id < HAZARD_TABLE_MAX_SIZE);
382 if (id >= hazard_table_size) {
383 #if MONO_SMALL_CONFIG
384 hazard_table = g_malloc0 (sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE);
385 hazard_table_size = HAZARD_TABLE_MAX_SIZE;
388 int pagesize = mono_pagesize ();
389 int num_pages = (hazard_table_size * sizeof (MonoThreadHazardPointers) + pagesize - 1) / pagesize;
391 if (hazard_table == NULL) {
392 hazard_table = mono_valloc (NULL,
393 sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE,
397 g_assert (hazard_table != NULL);
398 page_addr = (guint8*)hazard_table + num_pages * pagesize;
400 mono_mprotect (page_addr, pagesize, MONO_MMAP_READ | MONO_MMAP_WRITE);
403 hazard_table_size = num_pages * pagesize / sizeof (MonoThreadHazardPointers);
406 g_assert (id < hazard_table_size);
407 hazard_table [id].hazard_pointers [0] = NULL;
408 hazard_table [id].hazard_pointers [1] = NULL;
411 if (id > highest_small_id) {
412 highest_small_id = id;
413 mono_memory_write_barrier ();
416 LeaveCriticalSection (&small_id_mutex);
422 small_id_free (int id)
424 g_assert (id >= 0 && id < small_id_table_size);
425 g_assert (small_id_table [id] != NULL);
427 small_id_table [id] = NULL;
431 is_pointer_hazardous (gpointer p)
434 int highest = highest_small_id;
436 g_assert (highest < hazard_table_size);
438 for (i = 0; i <= highest; ++i) {
439 if (hazard_table [i].hazard_pointers [0] == p
440 || hazard_table [i].hazard_pointers [1] == p)
447 MonoThreadHazardPointers*
448 mono_hazard_pointer_get (void)
450 MonoInternalThread *current_thread = mono_thread_internal_current ();
452 if (!(current_thread && current_thread->small_id >= 0)) {
453 static MonoThreadHazardPointers emerg_hazard_table;
454 g_warning ("Thread %p may have been prematurely finalized", current_thread);
455 return &emerg_hazard_table;
458 return &hazard_table [current_thread->small_id];
462 try_free_delayed_free_item (int index)
464 if (delayed_free_table->len > index) {
465 DelayedFreeItem item = { NULL, NULL };
467 EnterCriticalSection (&delayed_free_table_mutex);
468 /* We have to check the length again because another
469 thread might have freed an item before we acquired
471 if (delayed_free_table->len > index) {
472 item = g_array_index (delayed_free_table, DelayedFreeItem, index);
474 if (!is_pointer_hazardous (item.p))
475 g_array_remove_index_fast (delayed_free_table, index);
479 LeaveCriticalSection (&delayed_free_table_mutex);
482 item.free_func (item.p);
487 mono_thread_hazardous_free_or_queue (gpointer p, MonoHazardousFreeFunc free_func)
491 /* First try to free a few entries in the delayed free
493 for (i = 2; i >= 0; --i)
494 try_free_delayed_free_item (i);
496 /* Now see if the pointer we're freeing is hazardous. If it
497 isn't, free it. Otherwise put it in the delay list. */
498 if (is_pointer_hazardous (p)) {
499 DelayedFreeItem item = { p, free_func };
501 ++mono_stats.hazardous_pointer_count;
503 EnterCriticalSection (&delayed_free_table_mutex);
504 g_array_append_val (delayed_free_table, item);
505 LeaveCriticalSection (&delayed_free_table_mutex);
511 mono_thread_hazardous_try_free_all (void)
516 if (!delayed_free_table)
519 len = delayed_free_table->len;
521 for (i = len - 1; i >= 0; --i)
522 try_free_delayed_free_item (i);
525 static void ensure_synch_cs_set (MonoInternalThread *thread)
527 CRITICAL_SECTION *synch_cs;
529 if (thread->synch_cs != NULL) {
533 synch_cs = g_new0 (CRITICAL_SECTION, 1);
534 InitializeCriticalSection (synch_cs);
536 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
537 synch_cs, NULL) != NULL) {
538 /* Another thread must have installed this CS */
539 DeleteCriticalSection (synch_cs);
545 * NOTE: this function can be called also for threads different from the current one:
546 * make sure no code called from it will ever assume it is run on the thread that is
547 * getting cleaned up.
549 static void thread_cleanup (MonoInternalThread *thread)
551 g_assert (thread != NULL);
553 if (thread->abort_state_handle) {
554 mono_gchandle_free (thread->abort_state_handle);
555 thread->abort_state_handle = 0;
557 thread->abort_exc = NULL;
558 thread->current_appcontext = NULL;
561 * This is necessary because otherwise we might have
562 * cross-domain references which will not get cleaned up when
563 * the target domain is unloaded.
565 if (thread->cached_culture_info) {
567 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
568 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
571 /* if the thread is not in the hash it has been removed already */
572 if (!handle_remove (thread)) {
573 /* This needs to be called even if handle_remove () fails */
574 if (mono_thread_cleanup_fn)
575 mono_thread_cleanup_fn (thread);
578 mono_release_type_locks (thread);
580 EnterCriticalSection (thread->synch_cs);
582 thread->state |= ThreadState_Stopped;
583 thread->state &= ~ThreadState_Background;
585 LeaveCriticalSection (thread->synch_cs);
587 mono_profiler_thread_end (thread->tid);
589 if (thread == mono_thread_internal_current ())
590 mono_thread_pop_appdomain_ref ();
592 thread->cached_culture_info = NULL;
594 mono_free_static_data (thread->static_data, TRUE);
595 thread->static_data = NULL;
597 if (mono_thread_cleanup_fn)
598 mono_thread_cleanup_fn (thread);
600 small_id_free (thread->small_id);
601 thread->small_id = -2;
606 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
609 g_assert ((offset & 0x80000000) == 0);
610 offset &= 0x7fffffff;
611 idx = (offset >> 24) - 1;
612 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
616 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
618 static MonoClassField *current_thread_field = NULL;
622 if (!current_thread_field) {
623 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
624 g_assert (current_thread_field);
627 mono_class_vtable (domain, mono_defaults.thread_class);
628 mono_domain_lock (domain);
629 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
630 mono_domain_unlock (domain);
633 return get_thread_static_data (thread, offset);
637 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
639 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
641 g_assert (current->obj.vtable->domain == domain);
643 g_assert (!*current_thread_ptr);
644 *current_thread_ptr = current;
647 static MonoInternalThread*
648 create_internal_thread_object (void)
650 MonoVTable *vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
651 return (MonoInternalThread*)mono_gc_alloc_mature (vt);
655 create_thread_object (MonoDomain *domain)
657 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
658 return (MonoThread*)mono_gc_alloc_mature (vt);
662 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
664 MonoThread *thread = create_thread_object (domain);
665 MONO_OBJECT_SETREF (thread, internal_thread, internal);
670 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
672 MonoDomain *domain = mono_get_root_domain ();
674 if (!candidate || candidate->obj.vtable->domain != domain)
675 candidate = new_thread_with_internal (domain, thread);
676 set_current_thread_for_domain (domain, thread, candidate);
677 g_assert (!thread->root_domain_thread);
678 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
681 static guint32 WINAPI start_wrapper_internal(void *data)
683 struct StartInfo *start_info=(struct StartInfo *)data;
684 guint32 (*start_func)(void *);
688 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
691 MonoInternalThread *internal = start_info->obj->internal_thread;
692 MonoObject *start_delegate = start_info->delegate;
693 MonoDomain *domain = start_info->obj->obj.vtable->domain;
695 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
697 /* We can be sure start_info->obj->tid and
698 * start_info->obj->handle have been set, because the thread
699 * was created suspended, and these values were set before the
705 SET_CURRENT_OBJECT (internal);
707 mono_monitor_init_tls ();
709 /* Every thread references the appdomain which created it */
710 mono_thread_push_appdomain_ref (domain);
712 if (!mono_domain_set (domain, FALSE)) {
713 /* No point in raising an appdomain_unloaded exception here */
714 /* FIXME: Cleanup here */
715 mono_thread_pop_appdomain_ref ();
719 start_func = start_info->func;
720 start_arg = start_info->start_arg;
722 /* We have to do this here because mono_thread_new_init()
723 requires that root_domain_thread is set up. */
724 thread_adjust_static_data (internal);
725 init_root_domain_thread (internal, start_info->obj);
727 /* This MUST be called before any managed code can be
728 * executed, as it calls the callback function that (for the
729 * jit) sets the lmf marker.
731 mono_thread_new_init (tid, &tid, start_func);
732 internal->stack_ptr = &tid;
734 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
736 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
738 /* On 2.0 profile (and higher), set explicitly since state might have been
740 if (internal->apartment_state == ThreadApartmentState_Unknown)
741 internal->apartment_state = ThreadApartmentState_MTA;
743 mono_thread_init_apartment_state ();
745 if(internal->start_notify!=NULL) {
746 /* Let the thread that called Start() know we're
749 ReleaseSemaphore (internal->start_notify, 1, NULL);
752 mono_threads_lock ();
753 mono_g_hash_table_remove (thread_start_args, start_info->obj);
754 mono_threads_unlock ();
756 mono_thread_set_execution_context (start_info->obj->ec_to_set);
757 start_info->obj->ec_to_set = NULL;
760 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
764 * Call this after calling start_notify, since the profiler callback might want
765 * to lock the thread, and the lock is held by thread_start () which waits for
768 mono_profiler_thread_start (tid);
770 /* start_func is set only for unmanaged start functions */
772 start_func (start_arg);
775 g_assert (start_delegate != NULL);
776 args [0] = start_arg;
777 /* we may want to handle the exception here. See comment below on unhandled exceptions */
778 mono_runtime_delegate_invoke (start_delegate, args, NULL);
781 /* If the thread calls ExitThread at all, this remaining code
782 * will not be executed, but the main thread will eventually
783 * call thread_cleanup() on this thread's behalf.
786 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
788 thread_cleanup (internal);
790 /* Do any cleanup needed for apartment state. This
791 * cannot be done in thread_cleanup since thread_cleanup could be
792 * called for a thread other than the current thread.
793 * mono_thread_cleanup_apartment_state cleans up apartment
794 * for the current thead */
795 mono_thread_cleanup_apartment_state ();
797 /* Remove the reference to the thread object in the TLS data,
798 * so the thread object can be finalized. This won't be
799 * reached if the thread threw an uncaught exception, so those
800 * thread handles will stay referenced :-( (This is due to
801 * missing support for scanning thread-specific data in the
802 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
805 SET_CURRENT_OBJECT (NULL);
806 mono_domain_unset ();
811 static guint32 WINAPI start_wrapper(void *data)
816 /* Avoid scanning the frames above this frame during a GC */
817 mono_gc_set_stack_end ((void*)&dummy);
820 return start_wrapper_internal (data);
823 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
825 if (mono_thread_start_cb) {
826 mono_thread_start_cb (tid, stack_start, func);
830 void mono_threads_set_default_stacksize (guint32 stacksize)
832 default_stacksize = stacksize;
835 guint32 mono_threads_get_default_stacksize (void)
837 return default_stacksize;
841 * mono_create_thread:
843 * This is a wrapper around CreateThread which handles differences in the type of
844 * the the 'tid' argument.
846 gpointer mono_create_thread (WapiSecurityAttributes *security,
847 guint32 stacksize, WapiThreadStart start,
848 gpointer param, guint32 create, gsize *tid)
855 res = CreateThread (security, stacksize, start, param, create, &real_tid);
859 res = CreateThread (security, stacksize, start, param, create, tid);
866 * The thread start argument may be an object reference, and there is
867 * no ref to keep it alive when the new thread is started but not yet
868 * registered with the collector. So we store it in a GC tracked hash
871 * LOCKING: Assumes the threads lock is held.
874 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
876 if (thread_start_args == NULL) {
877 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
878 thread_start_args = mono_g_hash_table_new (NULL, NULL);
880 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
883 MonoInternalThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread)
886 MonoInternalThread *internal;
887 HANDLE thread_handle;
888 struct StartInfo *start_info;
891 thread = create_thread_object (domain);
892 internal = create_internal_thread_object ();
893 MONO_OBJECT_SETREF (thread, internal_thread, internal);
895 start_info=g_new0 (struct StartInfo, 1);
896 start_info->func = func;
897 start_info->obj = thread;
898 start_info->start_arg = arg;
900 mono_threads_lock ();
902 mono_threads_unlock ();
906 if (threads_starting_up == NULL) {
907 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
908 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
911 register_thread_start_argument (thread, start_info);
912 mono_g_hash_table_insert (threads_starting_up, thread, thread);
913 mono_threads_unlock ();
915 /* Create suspended, so we can do some housekeeping before the thread
918 thread_handle = mono_create_thread (NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
919 CREATE_SUSPENDED, &tid);
920 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
921 if (thread_handle == NULL) {
922 /* The thread couldn't be created, so throw an exception */
923 mono_threads_lock ();
924 mono_g_hash_table_remove (threads_starting_up, thread);
925 mono_threads_unlock ();
927 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
931 internal->handle=thread_handle;
933 internal->apartment_state=ThreadApartmentState_Unknown;
934 small_id_alloc (internal);
936 internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
937 InitializeCriticalSection (internal->synch_cs);
939 internal->threadpool_thread = threadpool_thread;
940 if (threadpool_thread)
941 mono_thread_set_state (internal, ThreadState_Background);
943 if (handle_store (thread))
944 ResumeThread (thread_handle);
950 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
952 mono_thread_create_internal (domain, func, arg, FALSE);
956 * mono_thread_get_stack_bounds:
958 * Return the address and size of the current threads stack. Return NULL as the
959 * stack address if the stack address cannot be determined.
962 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
964 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
965 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
966 *stsize = pthread_get_stacksize_np (pthread_self ());
967 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
969 /* FIXME: simplify the mess below */
970 #elif !defined(HOST_WIN32)
972 guint8 *current = (guint8*)&attr;
974 pthread_attr_init (&attr);
975 # ifdef HAVE_PTHREAD_GETATTR_NP
976 pthread_getattr_np (pthread_self(), &attr);
978 # ifdef HAVE_PTHREAD_ATTR_GET_NP
979 pthread_attr_get_np (pthread_self(), &attr);
982 pthread_attr_getstacksize (&attr, &stsize);
983 # elif defined(__OpenBSD__)
987 rslt = pthread_stackseg_np(pthread_self(), &ss);
988 g_assert (rslt == 0);
990 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
991 *stsize = ss.ss_size;
1000 # if !defined(__OpenBSD__)
1001 pthread_attr_getstack (&attr, (void**)staddr, stsize);
1004 g_assert ((current > *staddr) && (current < *staddr + *stsize));
1007 pthread_attr_destroy (&attr);
1010 *stsize = (size_t)-1;
1013 /* When running under emacs, sometimes staddr is not aligned to a page size */
1014 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
1018 mono_thread_attach (MonoDomain *domain)
1020 MonoInternalThread *thread;
1021 MonoThread *current_thread;
1022 HANDLE thread_handle;
1025 if ((thread = mono_thread_internal_current ())) {
1026 if (domain != mono_domain_get ())
1027 mono_domain_set (domain, TRUE);
1028 /* Already attached */
1029 return mono_thread_current ();
1032 if (!mono_gc_register_thread (&domain)) {
1033 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.", GetCurrentThreadId ());
1036 thread = create_internal_thread_object ();
1038 thread_handle = GetCurrentThread ();
1039 g_assert (thread_handle);
1041 tid=GetCurrentThreadId ();
1044 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
1045 * refer to the thread from other threads for things like aborting.
1047 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
1048 THREAD_ALL_ACCESS, TRUE, 0);
1050 thread->handle=thread_handle;
1052 #ifdef PLATFORM_ANDROID
1053 thread->android_tid = (gpointer) gettid ();
1055 thread->apartment_state=ThreadApartmentState_Unknown;
1056 small_id_alloc (thread);
1057 thread->stack_ptr = &tid;
1059 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
1060 InitializeCriticalSection (thread->synch_cs);
1062 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1064 current_thread = new_thread_with_internal (domain, thread);
1066 if (!handle_store (current_thread)) {
1067 /* Mono is shutting down, so just wait for the end */
1072 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
1074 SET_CURRENT_OBJECT (thread);
1075 mono_domain_set (domain, TRUE);
1077 mono_monitor_init_tls ();
1079 thread_adjust_static_data (thread);
1081 init_root_domain_thread (thread, current_thread);
1082 if (domain != mono_get_root_domain ())
1083 set_current_thread_for_domain (domain, thread, current_thread);
1086 if (mono_thread_attach_cb) {
1090 mono_thread_get_stack_bounds (&staddr, &stsize);
1093 mono_thread_attach_cb (tid, &tid);
1095 mono_thread_attach_cb (tid, staddr + stsize);
1098 // FIXME: Need a separate callback
1099 mono_profiler_thread_start (tid);
1101 return current_thread;
1105 mono_thread_detach (MonoThread *thread)
1107 g_return_if_fail (thread != NULL);
1109 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
1111 thread_cleanup (thread->internal_thread);
1113 SET_CURRENT_OBJECT (NULL);
1114 mono_domain_unset ();
1116 /* Don't need to CloseHandle this thread, even though we took a
1117 * reference in mono_thread_attach (), because the GC will do it
1118 * when the Thread object is finalised.
1125 MonoInternalThread *thread = mono_thread_internal_current ();
1127 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1129 thread_cleanup (thread);
1130 SET_CURRENT_OBJECT (NULL);
1131 mono_domain_unset ();
1133 /* we could add a callback here for embedders to use. */
1134 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1135 exit (mono_environment_exitcode_get ());
1140 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1142 MonoInternalThread *internal = create_internal_thread_object ();
1144 internal->state = ThreadState_Unstarted;
1145 internal->apartment_state = ThreadApartmentState_Unknown;
1147 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1150 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
1153 guint32 (*start_func)(void *);
1154 struct StartInfo *start_info;
1157 MonoInternalThread *internal;
1159 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1161 if (!this->internal_thread)
1162 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1163 internal = this->internal_thread;
1165 ensure_synch_cs_set (internal);
1167 EnterCriticalSection (internal->synch_cs);
1169 if ((internal->state & ThreadState_Unstarted) == 0) {
1170 LeaveCriticalSection (internal->synch_cs);
1171 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1175 internal->small_id = -1;
1177 if ((internal->state & ThreadState_Aborted) != 0) {
1178 LeaveCriticalSection (internal->synch_cs);
1183 /* This is freed in start_wrapper */
1184 start_info = g_new0 (struct StartInfo, 1);
1185 start_info->func = start_func;
1186 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1187 start_info->delegate = start;
1188 start_info->obj = this;
1189 g_assert (this->obj.vtable->domain == mono_domain_get ());
1191 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1192 if (internal->start_notify==NULL) {
1193 LeaveCriticalSection (internal->synch_cs);
1194 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1195 g_free (start_info);
1199 mono_threads_lock ();
1200 register_thread_start_argument (this, start_info);
1201 if (threads_starting_up == NULL) {
1202 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1203 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1205 mono_g_hash_table_insert (threads_starting_up, this, this);
1206 mono_threads_unlock ();
1208 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1209 CREATE_SUSPENDED, &tid);
1211 LeaveCriticalSection (internal->synch_cs);
1212 mono_threads_lock ();
1213 mono_g_hash_table_remove (threads_starting_up, this);
1214 mono_threads_unlock ();
1215 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1219 internal->handle=thread;
1221 small_id_alloc (internal);
1223 /* Don't call handle_store() here, delay it to Start.
1224 * We can't join a thread (trying to will just block
1225 * forever) until it actually starts running, so don't
1226 * store the handle till then.
1229 mono_thread_start (this);
1231 internal->state &= ~ThreadState_Unstarted;
1233 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1235 LeaveCriticalSection (internal->synch_cs);
1240 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1242 MONO_ARCH_SAVE_REGS;
1244 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1247 CloseHandle (thread);
1249 if (this->synch_cs) {
1250 DeleteCriticalSection (this->synch_cs);
1251 g_free (this->synch_cs);
1252 this->synch_cs = NULL;
1255 g_free (this->name);
1258 static void mono_thread_start (MonoThread *thread)
1260 MonoInternalThread *internal = thread->internal_thread;
1262 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1264 /* Only store the handle when the thread is about to be
1265 * launched, to avoid the main thread deadlocking while trying
1266 * to clean up a thread that will never be signalled.
1268 if (!handle_store (thread))
1271 ResumeThread (internal->handle);
1273 if(internal->start_notify!=NULL) {
1274 /* Wait for the thread to set up its TLS data etc, so
1275 * theres no potential race condition if someone tries
1276 * to look up the data believing the thread has
1280 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1282 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1283 CloseHandle (internal->start_notify);
1284 internal->start_notify = NULL;
1287 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1290 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1293 MonoInternalThread *thread = mono_thread_internal_current ();
1295 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1297 mono_thread_current_check_pending_interrupt ();
1299 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1301 res = SleepEx(ms,TRUE);
1303 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1305 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1306 MonoException* exc = mono_thread_execute_interruption (thread);
1307 if (exc) mono_raise_exception (exc);
1311 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1316 ves_icall_System_Threading_Thread_GetDomainID (void)
1318 MONO_ARCH_SAVE_REGS;
1320 return mono_domain_get()->domain_id;
1324 ves_icall_System_Threading_Thread_Yield (void)
1327 return SwitchToThread ();
1329 return sched_yield () == 0;
1334 * mono_thread_get_name:
1336 * Return the name of the thread. NAME_LEN is set to the length of the name.
1337 * Return NULL if the thread has no name. The returned memory is owned by the
1341 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1345 ensure_synch_cs_set (this_obj);
1347 EnterCriticalSection (this_obj->synch_cs);
1349 if (!this_obj->name) {
1353 *name_len = this_obj->name_len;
1354 res = g_new (gunichar2, this_obj->name_len);
1355 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1358 LeaveCriticalSection (this_obj->synch_cs);
1364 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1368 ensure_synch_cs_set (this_obj);
1370 EnterCriticalSection (this_obj->synch_cs);
1372 if (!this_obj->name)
1375 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1377 LeaveCriticalSection (this_obj->synch_cs);
1383 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1385 ensure_synch_cs_set (this_obj);
1387 EnterCriticalSection (this_obj->synch_cs);
1389 if (this_obj->name) {
1390 LeaveCriticalSection (this_obj->synch_cs);
1392 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1396 this_obj->name = g_new (gunichar2, mono_string_length (name));
1397 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1398 this_obj->name_len = mono_string_length (name);
1401 this_obj->name = NULL;
1403 LeaveCriticalSection (this_obj->synch_cs);
1404 if (this_obj->name) {
1405 char *tname = mono_string_to_utf8 (name);
1406 mono_profiler_thread_name (this_obj->tid, tname);
1411 /* If the array is already in the requested domain, we just return it,
1412 otherwise we return a copy in that domain. */
1414 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1421 if (mono_object_domain (arr) == domain)
1424 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1425 memcpy (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1430 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1432 return byte_array_to_domain (arr, mono_get_root_domain ());
1436 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1438 return byte_array_to_domain (arr, mono_domain_get ());
1442 mono_thread_current (void)
1444 MonoDomain *domain = mono_domain_get ();
1445 MonoInternalThread *internal = mono_thread_internal_current ();
1446 MonoThread **current_thread_ptr;
1448 g_assert (internal);
1449 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1451 if (!*current_thread_ptr) {
1452 g_assert (domain != mono_get_root_domain ());
1453 *current_thread_ptr = new_thread_with_internal (domain, internal);
1455 return *current_thread_ptr;
1459 mono_thread_internal_current (void)
1461 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1462 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1466 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1467 int ms, HANDLE thread)
1469 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1472 mono_thread_current_check_pending_interrupt ();
1474 ensure_synch_cs_set (this);
1476 EnterCriticalSection (this->synch_cs);
1478 if ((this->state & ThreadState_Unstarted) != 0) {
1479 LeaveCriticalSection (this->synch_cs);
1481 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1485 LeaveCriticalSection (this->synch_cs);
1490 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1492 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1494 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1496 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1498 if(ret==WAIT_OBJECT_0) {
1499 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1504 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1509 /* FIXME: exitContext isnt documented */
1510 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1516 MonoObject *waitHandle;
1517 MonoInternalThread *thread = mono_thread_internal_current ();
1519 /* Do this WaitSleepJoin check before creating objects */
1520 mono_thread_current_check_pending_interrupt ();
1522 numhandles = mono_array_length(mono_handles);
1523 handles = g_new0(HANDLE, numhandles);
1525 for(i = 0; i < numhandles; i++) {
1526 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1527 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1534 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1536 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1538 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1542 if(ret==WAIT_FAILED) {
1543 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1545 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1546 /* Do we want to try again if we get
1547 * WAIT_IO_COMPLETION? The documentation for
1548 * WaitHandle doesn't give any clues. (We'd have to
1549 * fiddle with the timeout if we retry.)
1551 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1558 /* FIXME: exitContext isnt documented */
1559 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1561 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1565 MonoObject *waitHandle;
1566 MonoInternalThread *thread = mono_thread_internal_current ();
1569 /* Do this WaitSleepJoin check before creating objects */
1570 mono_thread_current_check_pending_interrupt ();
1572 numhandles = mono_array_length(mono_handles);
1573 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1576 for(i = 0; i < numhandles; i++) {
1577 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1578 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1585 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1587 start = (ms == -1) ? 0 : mono_msec_ticks ();
1589 ret = WaitForMultipleObjectsEx (numhandles, handles, FALSE, ms, TRUE);
1590 if (ret != WAIT_IO_COMPLETION)
1595 diff = mono_msec_ticks () - start;
1600 } while (ms == -1 || ms > 0);
1602 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1604 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1607 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1609 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1610 return ret - WAIT_OBJECT_0;
1612 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1613 return ret - WAIT_ABANDONED_0;
1620 /* FIXME: exitContext isnt documented */
1621 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1624 MonoInternalThread *thread = mono_thread_internal_current ();
1626 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1632 mono_thread_current_check_pending_interrupt ();
1634 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1636 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1638 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1640 if(ret==WAIT_FAILED) {
1641 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1643 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1644 /* Do we want to try again if we get
1645 * WAIT_IO_COMPLETION? The documentation for
1646 * WaitHandle doesn't give any clues. (We'd have to
1647 * fiddle with the timeout if we retry.)
1649 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1657 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1660 MonoInternalThread *thread = mono_thread_internal_current ();
1662 MONO_ARCH_SAVE_REGS;
1667 mono_thread_current_check_pending_interrupt ();
1669 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1671 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1673 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1675 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1678 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1682 MONO_ARCH_SAVE_REGS;
1687 mutex = CreateMutex (NULL, owned, NULL);
1689 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1691 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1699 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1700 MONO_ARCH_SAVE_REGS;
1702 return(ReleaseMutex (handle));
1705 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1711 MONO_ARCH_SAVE_REGS;
1713 *error = ERROR_SUCCESS;
1715 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1717 *error = GetLastError ();
1724 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1728 MONO_ARCH_SAVE_REGS;
1733 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1735 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1736 mono_string_chars (name));
1738 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1746 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1750 MONO_ARCH_SAVE_REGS;
1752 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1757 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1761 MONO_ARCH_SAVE_REGS;
1763 *error = ERROR_SUCCESS;
1765 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1767 *error = GetLastError ();
1773 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1777 MONO_ARCH_SAVE_REGS;
1782 event = CreateEvent (NULL, manual, initial, NULL);
1784 event = CreateEvent (NULL, manual, initial,
1785 mono_string_chars (name));
1787 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1795 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1796 MONO_ARCH_SAVE_REGS;
1798 return (SetEvent(handle));
1801 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1802 MONO_ARCH_SAVE_REGS;
1804 return (ResetEvent(handle));
1808 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1809 MONO_ARCH_SAVE_REGS;
1811 CloseHandle (handle);
1814 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1820 MONO_ARCH_SAVE_REGS;
1822 *error = ERROR_SUCCESS;
1824 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1826 *error = GetLastError ();
1832 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1834 MONO_ARCH_SAVE_REGS;
1836 return InterlockedIncrement (location);
1839 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1843 MONO_ARCH_SAVE_REGS;
1845 mono_interlocked_lock ();
1849 mono_interlocked_unlock ();
1855 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1857 MONO_ARCH_SAVE_REGS;
1859 return InterlockedDecrement(location);
1862 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1866 MONO_ARCH_SAVE_REGS;
1868 mono_interlocked_lock ();
1872 mono_interlocked_unlock ();
1877 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1879 MONO_ARCH_SAVE_REGS;
1881 return InterlockedExchange(location, value);
1884 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1887 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1888 mono_gc_wbarrier_generic_nostore (location);
1892 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1894 return InterlockedExchangePointer(location, value);
1897 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1899 IntFloatUnion val, ret;
1901 MONO_ARCH_SAVE_REGS;
1904 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1910 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1912 #if SIZEOF_VOID_P == 8
1913 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1918 * According to MSDN, this function is only atomic with regards to the
1919 * other Interlocked functions on 32 bit platforms.
1921 mono_interlocked_lock ();
1924 mono_interlocked_unlock ();
1931 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1933 #if SIZEOF_VOID_P == 8
1934 LongDoubleUnion val, ret;
1937 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1944 * According to MSDN, this function is only atomic with regards to the
1945 * other Interlocked functions on 32 bit platforms.
1947 mono_interlocked_lock ();
1950 mono_interlocked_unlock ();
1956 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1958 MONO_ARCH_SAVE_REGS;
1960 return InterlockedCompareExchange(location, value, comparand);
1963 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1966 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1967 mono_gc_wbarrier_generic_nostore (location);
1971 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1973 return InterlockedCompareExchangePointer(location, value, comparand);
1976 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1978 IntFloatUnion val, ret, cmp;
1980 MONO_ARCH_SAVE_REGS;
1983 cmp.fval = comparand;
1984 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1990 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1992 #if SIZEOF_VOID_P == 8
1993 LongDoubleUnion val, comp, ret;
1996 comp.fval = comparand;
1997 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2003 mono_interlocked_lock ();
2005 if (old == comparand)
2007 mono_interlocked_unlock ();
2014 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2016 #if SIZEOF_VOID_P == 8
2017 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
2021 mono_interlocked_lock ();
2023 if (old == comparand)
2025 mono_interlocked_unlock ();
2032 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2035 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
2036 mono_gc_wbarrier_generic_nostore (location);
2041 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2044 res = InterlockedExchangePointer ((gpointer *)location, value);
2045 mono_gc_wbarrier_generic_nostore (location);
2050 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2052 #if SIZEOF_VOID_P == 8
2053 /* Should be implemented as a JIT intrinsic */
2054 mono_raise_exception (mono_get_exception_not_implemented (NULL));
2059 mono_interlocked_lock ();
2061 *location = orig + value;
2062 mono_interlocked_unlock ();
2064 return orig + value;
2069 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2071 #if SIZEOF_VOID_P == 8
2072 /* Should be implemented as a JIT intrinsic */
2073 mono_raise_exception (mono_get_exception_not_implemented (NULL));
2078 mono_interlocked_lock ();
2080 *location = orig + value;
2081 mono_interlocked_unlock ();
2083 return orig + value;
2088 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2090 #if SIZEOF_VOID_P == 8
2091 /* 64 bit reads are already atomic */
2096 mono_interlocked_lock ();
2098 mono_interlocked_unlock ();
2105 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2107 mono_threads_lock ();
2108 mono_threads_unlock ();
2112 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
2114 mono_thread_clr_state (this, state);
2116 if (state & ThreadState_Background) {
2117 /* If the thread changes the background mode, the main thread has to
2118 * be notified, since it has to rebuild the list of threads to
2121 SetEvent (background_change_event);
2126 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
2128 mono_thread_set_state (this, state);
2130 if (state & ThreadState_Background) {
2131 /* If the thread changes the background mode, the main thread has to
2132 * be notified, since it has to rebuild the list of threads to
2135 SetEvent (background_change_event);
2140 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2144 ensure_synch_cs_set (this);
2146 EnterCriticalSection (this->synch_cs);
2148 state = this->state;
2150 LeaveCriticalSection (this->synch_cs);
2155 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2157 gboolean throw = FALSE;
2159 ensure_synch_cs_set (this);
2161 if (this == mono_thread_internal_current ())
2164 EnterCriticalSection (this->synch_cs);
2166 this->thread_interrupt_requested = TRUE;
2168 if (this->state & ThreadState_WaitSleepJoin) {
2172 LeaveCriticalSection (this->synch_cs);
2175 signal_thread_state_change (this);
2179 void mono_thread_current_check_pending_interrupt ()
2181 MonoInternalThread *thread = mono_thread_internal_current ();
2182 gboolean throw = FALSE;
2184 mono_debugger_check_interruption ();
2186 ensure_synch_cs_set (thread);
2188 EnterCriticalSection (thread->synch_cs);
2190 if (thread->thread_interrupt_requested) {
2192 thread->thread_interrupt_requested = FALSE;
2195 LeaveCriticalSection (thread->synch_cs);
2198 mono_raise_exception (mono_get_exception_thread_interrupted ());
2203 mono_thread_get_abort_signal (void)
2215 static int abort_signum = -1;
2217 if (abort_signum != -1)
2218 return abort_signum;
2219 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2220 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2221 struct sigaction sinfo;
2222 sigaction (i, NULL, &sinfo);
2223 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2228 /* fallback to the old way */
2231 #endif /* HOST_WIN32 */
2235 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2237 MonoException* exc = mono_thread_request_interruption (FALSE);
2238 if (exc) mono_raise_exception (exc);
2240 #endif /* HOST_WIN32 */
2243 * signal_thread_state_change
2245 * Tells the thread that his state has changed and it has to enter the new
2246 * state as soon as possible.
2248 static void signal_thread_state_change (MonoInternalThread *thread)
2250 if (thread == mono_thread_internal_current ()) {
2251 /* Do it synchronously */
2252 MonoException *exc = mono_thread_request_interruption (FALSE);
2254 mono_raise_exception (exc);
2258 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2260 /* fixme: store the state somewhere */
2261 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2264 * This will cause waits to be broken.
2265 * It will also prevent the thread from entering a wait, so if the thread returns
2266 * from the wait before it receives the abort signal, it will just spin in the wait
2267 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2270 wapi_interrupt_thread (thread->handle);
2271 #endif /* HOST_WIN32 */
2275 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2277 ensure_synch_cs_set (thread);
2279 EnterCriticalSection (thread->synch_cs);
2281 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2282 (thread->state & ThreadState_StopRequested) != 0 ||
2283 (thread->state & ThreadState_Stopped) != 0)
2285 LeaveCriticalSection (thread->synch_cs);
2289 if ((thread->state & ThreadState_Unstarted) != 0) {
2290 thread->state |= ThreadState_Aborted;
2291 LeaveCriticalSection (thread->synch_cs);
2295 thread->state |= ThreadState_AbortRequested;
2296 if (thread->abort_state_handle)
2297 mono_gchandle_free (thread->abort_state_handle);
2299 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2300 g_assert (thread->abort_state_handle);
2302 thread->abort_state_handle = 0;
2304 thread->abort_exc = NULL;
2307 * abort_exc is set in mono_thread_execute_interruption(),
2308 * triggered by the call to signal_thread_state_change(),
2309 * below. There's a point between where we have
2310 * abort_state_handle set, but abort_exc NULL, but that's not
2314 LeaveCriticalSection (thread->synch_cs);
2316 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2318 /* During shutdown, we can't wait for other threads */
2320 /* Make sure the thread is awake */
2321 mono_thread_resume (thread);
2323 signal_thread_state_change (thread);
2327 ves_icall_System_Threading_Thread_ResetAbort (void)
2329 MonoInternalThread *thread = mono_thread_internal_current ();
2330 gboolean was_aborting;
2332 ensure_synch_cs_set (thread);
2334 EnterCriticalSection (thread->synch_cs);
2335 was_aborting = thread->state & ThreadState_AbortRequested;
2336 thread->state &= ~ThreadState_AbortRequested;
2337 LeaveCriticalSection (thread->synch_cs);
2339 if (!was_aborting) {
2340 const char *msg = "Unable to reset abort because no abort was requested";
2341 mono_raise_exception (mono_get_exception_thread_state (msg));
2343 thread->abort_exc = NULL;
2344 if (thread->abort_state_handle) {
2345 mono_gchandle_free (thread->abort_state_handle);
2346 /* This is actually not necessary - the handle
2347 only counts if the exception is set */
2348 thread->abort_state_handle = 0;
2353 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2355 ensure_synch_cs_set (thread);
2357 EnterCriticalSection (thread->synch_cs);
2359 thread->state &= ~ThreadState_AbortRequested;
2361 if (thread->abort_exc) {
2362 thread->abort_exc = NULL;
2363 if (thread->abort_state_handle) {
2364 mono_gchandle_free (thread->abort_state_handle);
2365 /* This is actually not necessary - the handle
2366 only counts if the exception is set */
2367 thread->abort_state_handle = 0;
2371 LeaveCriticalSection (thread->synch_cs);
2375 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2377 MonoInternalThread *thread = this->internal_thread;
2378 MonoObject *state, *deserialized = NULL, *exc;
2381 if (!thread->abort_state_handle)
2384 state = mono_gchandle_get_target (thread->abort_state_handle);
2387 domain = mono_domain_get ();
2388 if (mono_object_domain (state) == domain)
2391 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2393 if (!deserialized) {
2394 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2396 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2397 mono_raise_exception (invalid_op_exc);
2400 return deserialized;
2404 mono_thread_suspend (MonoInternalThread *thread)
2406 ensure_synch_cs_set (thread);
2408 EnterCriticalSection (thread->synch_cs);
2410 if ((thread->state & ThreadState_Unstarted) != 0 ||
2411 (thread->state & ThreadState_Aborted) != 0 ||
2412 (thread->state & ThreadState_Stopped) != 0)
2414 LeaveCriticalSection (thread->synch_cs);
2418 if ((thread->state & ThreadState_Suspended) != 0 ||
2419 (thread->state & ThreadState_SuspendRequested) != 0 ||
2420 (thread->state & ThreadState_StopRequested) != 0)
2422 LeaveCriticalSection (thread->synch_cs);
2426 thread->state |= ThreadState_SuspendRequested;
2428 LeaveCriticalSection (thread->synch_cs);
2430 signal_thread_state_change (thread);
2435 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2437 if (!mono_thread_suspend (thread))
2438 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2442 mono_thread_resume (MonoInternalThread *thread)
2444 ensure_synch_cs_set (thread);
2446 EnterCriticalSection (thread->synch_cs);
2448 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2449 thread->state &= ~ThreadState_SuspendRequested;
2450 LeaveCriticalSection (thread->synch_cs);
2454 if ((thread->state & ThreadState_Suspended) == 0 ||
2455 (thread->state & ThreadState_Unstarted) != 0 ||
2456 (thread->state & ThreadState_Aborted) != 0 ||
2457 (thread->state & ThreadState_Stopped) != 0)
2459 LeaveCriticalSection (thread->synch_cs);
2463 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2464 if (thread->resume_event == NULL) {
2465 LeaveCriticalSection (thread->synch_cs);
2469 /* Awake the thread */
2470 SetEvent (thread->suspend_event);
2472 LeaveCriticalSection (thread->synch_cs);
2474 /* Wait for the thread to awake */
2475 WaitForSingleObject (thread->resume_event, INFINITE);
2476 CloseHandle (thread->resume_event);
2477 thread->resume_event = NULL;
2483 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2485 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2486 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2490 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2495 if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
2496 m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
2497 m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
2499 *((gboolean*)data) = TRUE;
2506 is_running_protected_wrapper (void)
2508 gboolean found = FALSE;
2509 mono_stack_walk (find_wrapper, &found);
2513 void mono_thread_internal_stop (MonoInternalThread *thread)
2515 ensure_synch_cs_set (thread);
2517 EnterCriticalSection (thread->synch_cs);
2519 if ((thread->state & ThreadState_StopRequested) != 0 ||
2520 (thread->state & ThreadState_Stopped) != 0)
2522 LeaveCriticalSection (thread->synch_cs);
2526 /* Make sure the thread is awake */
2527 mono_thread_resume (thread);
2529 thread->state |= ThreadState_StopRequested;
2530 thread->state &= ~ThreadState_AbortRequested;
2532 LeaveCriticalSection (thread->synch_cs);
2534 signal_thread_state_change (thread);
2537 void mono_thread_stop (MonoThread *thread)
2539 mono_thread_internal_stop (thread->internal_thread);
2543 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2545 return *((volatile gint8 *) (ptr));
2549 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2551 return *((volatile gint16 *) (ptr));
2555 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2557 return *((volatile gint32 *) (ptr));
2561 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2563 return *((volatile gint64 *) (ptr));
2567 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2569 return (void *) *((volatile void **) ptr);
2573 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2575 *((volatile gint8 *) ptr) = value;
2579 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2581 *((volatile gint16 *) ptr) = value;
2585 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2587 *((volatile gint32 *) ptr) = value;
2591 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2593 *((volatile gint64 *) ptr) = value;
2597 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2599 *((volatile void **) ptr) = value;
2603 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2605 mono_gc_wbarrier_generic_store (ptr, value);
2608 void mono_thread_init (MonoThreadStartCB start_cb,
2609 MonoThreadAttachCB attach_cb)
2611 MONO_GC_REGISTER_ROOT_FIXED (small_id_table);
2612 InitializeCriticalSection(&threads_mutex);
2613 InitializeCriticalSection(&interlocked_mutex);
2614 InitializeCriticalSection(&contexts_mutex);
2615 InitializeCriticalSection(&delayed_free_table_mutex);
2616 InitializeCriticalSection(&small_id_mutex);
2618 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2619 g_assert(background_change_event != NULL);
2621 mono_init_static_data_info (&thread_static_info);
2622 mono_init_static_data_info (&context_static_info);
2624 MONO_FAST_TLS_INIT (tls_current_object);
2625 current_object_key=TlsAlloc();
2626 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2628 mono_thread_start_cb = start_cb;
2629 mono_thread_attach_cb = attach_cb;
2631 delayed_free_table = g_array_new (FALSE, FALSE, sizeof (DelayedFreeItem));
2633 /* Get a pseudo handle to the current process. This is just a
2634 * kludge so that wapi can build a process handle if needed.
2635 * As a pseudo handle is returned, we don't need to clean
2638 GetCurrentProcess ();
2641 void mono_thread_cleanup (void)
2643 mono_thread_hazardous_try_free_all ();
2645 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2646 /* The main thread must abandon any held mutexes (particularly
2647 * important for named mutexes as they are shared across
2648 * processes, see bug 74680.) This will happen when the
2649 * thread exits, but if it's not running in a subthread it
2650 * won't exit in time.
2652 /* Using non-w32 API is a nasty kludge, but I couldn't find
2653 * anything in the documentation that would let me do this
2654 * here yet still be safe to call on windows.
2656 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2660 /* This stuff needs more testing, it seems one of these
2661 * critical sections can be locked when mono_thread_cleanup is
2664 DeleteCriticalSection (&threads_mutex);
2665 DeleteCriticalSection (&interlocked_mutex);
2666 DeleteCriticalSection (&contexts_mutex);
2667 DeleteCriticalSection (&delayed_free_table_mutex);
2668 DeleteCriticalSection (&small_id_mutex);
2669 CloseHandle (background_change_event);
2672 g_array_free (delayed_free_table, TRUE);
2673 delayed_free_table = NULL;
2675 TlsFree (current_object_key);
2679 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2681 mono_thread_cleanup_fn = func;
2685 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2687 thread->internal_thread->manage_callback = func;
2690 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2692 mono_thread_notify_pending_exc_fn = func;
2696 static void print_tids (gpointer key, gpointer value, gpointer user)
2698 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2699 * sizeof(uint) and a cast to uint would overflow
2701 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2702 * print this as a pointer.
2704 g_message ("Waiting for: %p", key);
2709 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2710 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2714 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2718 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2720 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2722 if(ret==WAIT_FAILED) {
2723 /* See the comment in build_wait_tids() */
2724 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2728 for(i=0; i<wait->num; i++)
2729 CloseHandle (wait->handles[i]);
2731 if (ret == WAIT_TIMEOUT)
2734 for(i=0; i<wait->num; i++) {
2735 gsize tid = wait->threads[i]->tid;
2737 mono_threads_lock ();
2738 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2739 /* This thread must have been killed, because
2740 * it hasn't cleaned itself up. (It's just
2741 * possible that the thread exited before the
2742 * parent thread had a chance to store the
2743 * handle, and now there is another pointer to
2744 * the already-exited thread stored. In this
2745 * case, we'll just get two
2746 * mono_profiler_thread_end() calls for the
2750 mono_threads_unlock ();
2751 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2752 thread_cleanup (wait->threads[i]);
2754 mono_threads_unlock ();
2759 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2761 guint32 i, ret, count;
2763 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2765 /* Add the thread state change event, so it wakes up if a thread changes
2766 * to background mode.
2769 if (count < MAXIMUM_WAIT_OBJECTS) {
2770 wait->handles [count] = background_change_event;
2774 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2776 if(ret==WAIT_FAILED) {
2777 /* See the comment in build_wait_tids() */
2778 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2782 for(i=0; i<wait->num; i++)
2783 CloseHandle (wait->handles[i]);
2785 if (ret == WAIT_TIMEOUT)
2788 if (ret < wait->num) {
2789 gsize tid = wait->threads[ret]->tid;
2790 mono_threads_lock ();
2791 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2792 /* See comment in wait_for_tids about thread cleanup */
2793 mono_threads_unlock ();
2794 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2795 thread_cleanup (wait->threads [ret]);
2797 mono_threads_unlock ();
2801 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2803 struct wait_data *wait=(struct wait_data *)user;
2805 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2807 MonoInternalThread *thread=(MonoInternalThread *)value;
2809 /* Ignore background threads, we abort them later */
2810 /* Do not lock here since it is not needed and the caller holds threads_lock */
2811 if (thread->state & ThreadState_Background) {
2812 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2813 return; /* just leave, ignore */
2816 if (mono_gc_is_finalizer_internal_thread (thread)) {
2817 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2821 if (thread == mono_thread_internal_current ()) {
2822 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2826 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2827 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2831 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2832 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2836 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2837 if (handle == NULL) {
2838 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2842 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2843 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2844 wait->handles[wait->num]=handle;
2845 wait->threads[wait->num]=thread;
2848 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2850 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2855 /* Just ignore the rest, we can't do anything with
2862 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2864 struct wait_data *wait=(struct wait_data *)user;
2865 gsize self = GetCurrentThreadId ();
2866 MonoInternalThread *thread = value;
2869 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2872 /* The finalizer thread is not a background thread */
2873 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2874 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2876 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2880 /* printf ("A: %d\n", wait->num); */
2881 wait->handles[wait->num]=thread->handle;
2882 wait->threads[wait->num]=thread;
2885 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2886 mono_thread_internal_stop (thread);
2890 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2894 * mono_threads_set_shutting_down:
2896 * Is called by a thread that wants to shut down Mono. If the runtime is already
2897 * shutting down, the calling thread is suspended/stopped, and this function never
2901 mono_threads_set_shutting_down (void)
2903 MonoInternalThread *current_thread = mono_thread_internal_current ();
2905 mono_threads_lock ();
2907 if (shutting_down) {
2908 mono_threads_unlock ();
2910 /* Make sure we're properly suspended/stopped */
2912 EnterCriticalSection (current_thread->synch_cs);
2914 if ((current_thread->state & ThreadState_SuspendRequested) ||
2915 (current_thread->state & ThreadState_AbortRequested) ||
2916 (current_thread->state & ThreadState_StopRequested)) {
2917 LeaveCriticalSection (current_thread->synch_cs);
2918 mono_thread_execute_interruption (current_thread);
2920 current_thread->state |= ThreadState_Stopped;
2921 LeaveCriticalSection (current_thread->synch_cs);
2924 /*since we're killing the thread, unset the current domain.*/
2925 mono_domain_unset ();
2927 /* Wake up other threads potentially waiting for us */
2930 shutting_down = TRUE;
2932 /* Not really a background state change, but this will
2933 * interrupt the main thread if it is waiting for all
2934 * the other threads.
2936 SetEvent (background_change_event);
2938 mono_threads_unlock ();
2943 * mono_threads_is_shutting_down:
2945 * Returns whether a thread has commenced shutdown of Mono. Note that
2946 * if the function returns FALSE the caller must not assume that
2947 * shutdown is not in progress, because the situation might have
2948 * changed since the function returned. For that reason this function
2949 * is of very limited utility.
2952 mono_threads_is_shutting_down (void)
2954 return shutting_down;
2957 void mono_thread_manage (void)
2959 struct wait_data wait_data;
2960 struct wait_data *wait = &wait_data;
2962 memset (wait, 0, sizeof (struct wait_data));
2963 /* join each thread that's still running */
2964 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2966 mono_threads_lock ();
2968 THREAD_DEBUG (g_message("%s: No threads", __func__));
2969 mono_threads_unlock ();
2972 mono_threads_unlock ();
2975 mono_threads_lock ();
2976 if (shutting_down) {
2977 /* somebody else is shutting down */
2978 mono_threads_unlock ();
2981 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2982 mono_g_hash_table_foreach (threads, print_tids, NULL));
2984 ResetEvent (background_change_event);
2986 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2987 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2988 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2989 mono_threads_unlock ();
2991 /* Something to wait for */
2992 wait_for_tids_or_state_change (wait, INFINITE);
2994 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2995 } while(wait->num>0);
2997 mono_threads_set_shutting_down ();
2999 /* No new threads will be created after this point */
3001 mono_runtime_set_shutting_down ();
3003 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
3004 mono_thread_pool_cleanup ();
3007 * Remove everything but the finalizer thread and self.
3008 * Also abort all the background threads
3011 mono_threads_lock ();
3014 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3015 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3016 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3018 mono_threads_unlock ();
3020 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3022 /* Something to wait for */
3023 wait_for_tids (wait, INFINITE);
3025 } while (wait->num > 0);
3028 * give the subthreads a chance to really quit (this is mainly needed
3029 * to get correct user and system times from getrusage/wait/time(1)).
3030 * This could be removed if we avoid pthread_detach() and use pthread_join().
3037 static void terminate_thread (gpointer key, gpointer value, gpointer user)
3039 MonoInternalThread *thread=(MonoInternalThread *)value;
3041 if(thread->tid != (gsize)user) {
3042 /*TerminateThread (thread->handle, -1);*/
3046 void mono_thread_abort_all_other_threads (void)
3048 gsize self = GetCurrentThreadId ();
3050 mono_threads_lock ();
3051 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
3052 mono_g_hash_table_size (threads));
3053 mono_g_hash_table_foreach (threads, print_tids, NULL));
3055 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3057 mono_threads_unlock ();
3061 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3063 MonoInternalThread *thread = (MonoInternalThread*)value;
3064 struct wait_data *wait = (struct wait_data*)user_data;
3068 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3070 * This needs no locking.
3072 if ((thread->state & ThreadState_Suspended) != 0 ||
3073 (thread->state & ThreadState_Stopped) != 0)
3076 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3077 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3081 wait->handles [wait->num] = handle;
3082 wait->threads [wait->num] = thread;
3088 * mono_thread_suspend_all_other_threads:
3090 * Suspend all managed threads except the finalizer thread and this thread. It is
3091 * not possible to resume them later.
3093 void mono_thread_suspend_all_other_threads (void)
3095 struct wait_data wait_data;
3096 struct wait_data *wait = &wait_data;
3098 gsize self = GetCurrentThreadId ();
3100 guint32 eventidx = 0;
3101 gboolean starting, finished;
3103 memset (wait, 0, sizeof (struct wait_data));
3105 * The other threads could be in an arbitrary state at this point, i.e.
3106 * they could be starting up, shutting down etc. This means that there could be
3107 * threads which are not even in the threads hash table yet.
3111 * First we set a barrier which will be checked by all threads before they
3112 * are added to the threads hash table, and they will exit if the flag is set.
3113 * This ensures that no threads could be added to the hash later.
3114 * We will use shutting_down as the barrier for now.
3116 g_assert (shutting_down);
3119 * We make multiple calls to WaitForMultipleObjects since:
3120 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3121 * - some threads could exit without becoming suspended
3126 * Make a copy of the hashtable since we can't do anything with
3127 * threads while threads_mutex is held.
3130 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3131 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3132 mono_threads_lock ();
3133 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3134 mono_threads_unlock ();
3136 events = g_new0 (gpointer, wait->num);
3138 /* Get the suspended events that we'll be waiting for */
3139 for (i = 0; i < wait->num; ++i) {
3140 MonoInternalThread *thread = wait->threads [i];
3141 gboolean signal_suspend = FALSE;
3143 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3144 //CloseHandle (wait->handles [i]);
3145 wait->threads [i] = NULL; /* ignore this thread in next loop */
3149 ensure_synch_cs_set (thread);
3151 EnterCriticalSection (thread->synch_cs);
3153 if (thread->suspended_event == NULL) {
3154 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3155 if (thread->suspended_event == NULL) {
3156 /* Forget this one and go on to the next */
3157 LeaveCriticalSection (thread->synch_cs);
3162 if ((thread->state & ThreadState_Suspended) != 0 ||
3163 (thread->state & ThreadState_StopRequested) != 0 ||
3164 (thread->state & ThreadState_Stopped) != 0) {
3165 LeaveCriticalSection (thread->synch_cs);
3166 CloseHandle (wait->handles [i]);
3167 wait->threads [i] = NULL; /* ignore this thread in next loop */
3171 if ((thread->state & ThreadState_SuspendRequested) == 0)
3172 signal_suspend = TRUE;
3174 events [eventidx++] = thread->suspended_event;
3176 /* Convert abort requests into suspend requests */
3177 if ((thread->state & ThreadState_AbortRequested) != 0)
3178 thread->state &= ~ThreadState_AbortRequested;
3180 thread->state |= ThreadState_SuspendRequested;
3182 LeaveCriticalSection (thread->synch_cs);
3184 /* Signal the thread to suspend */
3186 signal_thread_state_change (thread);
3190 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3191 for (i = 0; i < wait->num; ++i) {
3192 MonoInternalThread *thread = wait->threads [i];
3197 ensure_synch_cs_set (thread);
3199 EnterCriticalSection (thread->synch_cs);
3200 if ((thread->state & ThreadState_Suspended) != 0) {
3201 CloseHandle (thread->suspended_event);
3202 thread->suspended_event = NULL;
3204 LeaveCriticalSection (thread->synch_cs);
3208 * If there are threads which are starting up, we wait until they
3209 * are suspended when they try to register in the threads hash.
3210 * This is guaranteed to finish, since the threads which can create new
3211 * threads get suspended after a while.
3212 * FIXME: The finalizer thread can still create new threads.
3214 mono_threads_lock ();
3215 if (threads_starting_up)
3216 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3219 mono_threads_unlock ();
3231 collect_threads (gpointer key, gpointer value, gpointer user_data)
3233 MonoInternalThread *thread = (MonoInternalThread*)value;
3234 struct wait_data *wait = (struct wait_data*)user_data;
3237 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3238 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3242 wait->handles [wait->num] = handle;
3243 wait->threads [wait->num] = thread;
3249 * mono_threads_request_thread_dump:
3251 * Ask all threads except the current to print their stacktrace to stdout.
3254 mono_threads_request_thread_dump (void)
3256 struct wait_data wait_data;
3257 struct wait_data *wait = &wait_data;
3260 memset (wait, 0, sizeof (struct wait_data));
3263 * Make a copy of the hashtable since we can't do anything with
3264 * threads while threads_mutex is held.
3266 mono_threads_lock ();
3267 mono_g_hash_table_foreach (threads, collect_threads, wait);
3268 mono_threads_unlock ();
3270 for (i = 0; i < wait->num; ++i) {
3271 MonoInternalThread *thread = wait->threads [i];
3273 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3274 (thread != mono_thread_internal_current ()) &&
3275 !thread->thread_dump_requested) {
3276 thread->thread_dump_requested = TRUE;
3278 signal_thread_state_change (thread);
3281 CloseHandle (wait->handles [i]);
3286 * mono_thread_push_appdomain_ref:
3288 * Register that the current thread may have references to objects in domain
3289 * @domain on its stack. Each call to this function should be paired with a
3290 * call to pop_appdomain_ref.
3293 mono_thread_push_appdomain_ref (MonoDomain *domain)
3295 MonoInternalThread *thread = mono_thread_internal_current ();
3298 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3299 SPIN_LOCK (thread->lock_thread_id);
3300 thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
3301 SPIN_UNLOCK (thread->lock_thread_id);
3306 mono_thread_pop_appdomain_ref (void)
3308 MonoInternalThread *thread = mono_thread_internal_current ();
3311 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3312 /* FIXME: How can the list be empty ? */
3313 SPIN_LOCK (thread->lock_thread_id);
3314 if (thread->appdomain_refs)
3315 thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
3316 SPIN_UNLOCK (thread->lock_thread_id);
3321 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3324 SPIN_LOCK (thread->lock_thread_id);
3325 res = g_slist_find (thread->appdomain_refs, domain) != NULL;
3326 SPIN_UNLOCK (thread->lock_thread_id);
3331 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3333 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3336 typedef struct abort_appdomain_data {
3337 struct wait_data wait;
3339 } abort_appdomain_data;
3342 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3344 MonoInternalThread *thread = (MonoInternalThread*)value;
3345 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3346 MonoDomain *domain = data->domain;
3348 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3349 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3351 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3352 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3355 data->wait.handles [data->wait.num] = handle;
3356 data->wait.threads [data->wait.num] = thread;
3359 /* Just ignore the rest, we can't do anything with
3367 * mono_threads_abort_appdomain_threads:
3369 * Abort threads which has references to the given appdomain.
3372 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3374 abort_appdomain_data user_data;
3376 int orig_timeout = timeout;
3379 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3381 start_time = mono_msec_ticks ();
3383 mono_threads_lock ();
3385 user_data.domain = domain;
3386 user_data.wait.num = 0;
3387 /* This shouldn't take any locks */
3388 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3389 mono_threads_unlock ();
3391 if (user_data.wait.num > 0) {
3392 /* Abort the threads outside the threads lock */
3393 for (i = 0; i < user_data.wait.num; ++i)
3394 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3397 * We should wait for the threads either to abort, or to leave the
3398 * domain. We can't do the latter, so we wait with a timeout.
3400 wait_for_tids (&user_data.wait, 100);
3403 /* Update remaining time */
3404 timeout -= mono_msec_ticks () - start_time;
3405 start_time = mono_msec_ticks ();
3407 if (orig_timeout != -1 && timeout < 0)
3410 while (user_data.wait.num > 0);
3412 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3418 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3420 MonoInternalThread *thread = (MonoInternalThread*)value;
3421 MonoDomain *domain = (MonoDomain*)user_data;
3424 /* No locking needed here */
3425 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3427 if (thread->cached_culture_info) {
3428 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3429 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3430 if (obj && obj->vtable->domain == domain)
3431 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3437 * mono_threads_clear_cached_culture:
3439 * Clear the cached_current_culture from all threads if it is in the
3443 mono_threads_clear_cached_culture (MonoDomain *domain)
3445 mono_threads_lock ();
3446 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3447 mono_threads_unlock ();
3451 * mono_thread_get_undeniable_exception:
3453 * Return an exception which needs to be raised when leaving a catch clause.
3454 * This is used for undeniable exception propagation.
3457 mono_thread_get_undeniable_exception (void)
3459 MonoInternalThread *thread = mono_thread_internal_current ();
3461 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3463 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3464 * exception if the thread no longer references a dying appdomain.
3466 thread->abort_exc->trace_ips = NULL;
3467 thread->abort_exc->stack_trace = NULL;
3468 return thread->abort_exc;
3474 #if MONO_SMALL_CONFIG
3475 #define NUM_STATIC_DATA_IDX 4
3476 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3480 #define NUM_STATIC_DATA_IDX 8
3481 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3482 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3486 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3490 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3493 gpointer *static_data = addr;
3494 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3497 if (!static_data [i])
3499 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3500 ptr = static_data [i];
3501 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3502 uintptr_t bmap = static_reference_bitmaps [i][j];
3505 if ((bmap & 1) && *p) {
3517 * mono_alloc_static_data
3519 * Allocate memory blocks for storing threads or context static data
3522 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3524 guint idx = (offset >> 24) - 1;
3527 gpointer* static_data = *static_data_ptr;
3529 static void* tls_desc = NULL;
3532 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3534 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3535 *static_data_ptr = static_data;
3536 static_data [0] = static_data;
3539 for (i = 1; i <= idx; ++i) {
3540 if (static_data [i])
3543 static_data [i] = threadlocal?g_malloc0 (static_data_size [i]):mono_gc_alloc_fixed (static_data_size [i], NULL);
3545 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3551 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3554 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3555 if (!static_data [i])
3559 g_free (static_data [i]);
3561 mono_gc_free_fixed (static_data [i]);
3563 mono_gc_free_fixed (static_data [i]);
3566 mono_gc_free_fixed (static_data);
3570 * mono_init_static_data_info
3572 * Initializes static data counters
3574 static void mono_init_static_data_info (StaticDataInfo *static_data)
3576 static_data->idx = 0;
3577 static_data->offset = 0;
3578 static_data->freelist = NULL;
3582 * mono_alloc_static_data_slot
3584 * Generates an offset for static data. static_data contains the counters
3585 * used to generate it.
3588 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3592 if (!static_data->idx && !static_data->offset) {
3594 * we use the first chunk of the first allocation also as
3595 * an array for the rest of the data
3597 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3599 static_data->offset += align - 1;
3600 static_data->offset &= ~(align - 1);
3601 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3602 static_data->idx ++;
3603 g_assert (size <= static_data_size [static_data->idx]);
3604 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3605 static_data->offset = 0;
3607 offset = static_data->offset | ((static_data->idx + 1) << 24);
3608 static_data->offset += size;
3613 * ensure thread static fields already allocated are valid for thread
3614 * This function is called when a thread is created or on thread attach.
3617 thread_adjust_static_data (MonoInternalThread *thread)
3621 mono_threads_lock ();
3622 if (thread_static_info.offset || thread_static_info.idx > 0) {
3623 /* get the current allocated size */
3624 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3625 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3627 mono_threads_unlock ();
3631 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3633 MonoInternalThread *thread = value;
3634 guint32 offset = GPOINTER_TO_UINT (user);
3636 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3639 static MonoThreadDomainTls*
3640 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3642 MonoThreadDomainTls* prev = NULL;
3643 MonoThreadDomainTls* tmp = static_data->freelist;
3645 if (tmp->size == size) {
3647 prev->next = tmp->next;
3649 static_data->freelist = tmp->next;
3658 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int max_set)
3661 int idx = (offset >> 24) - 1;
3663 if (!static_reference_bitmaps [idx])
3664 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3665 rb = static_reference_bitmaps [idx];
3667 offset /= sizeof (gpointer);
3668 /* offset is now the bitmap offset */
3669 for (i = 0; i < max_set; ++i) {
3670 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3671 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3676 clear_reference_bitmap (guint32 offset, guint32 size)
3678 int idx = (offset >> 24) - 1;
3680 rb = static_reference_bitmaps [idx];
3682 offset /= sizeof (gpointer);
3683 size /= sizeof (gpointer);
3685 /* offset is now the bitmap offset */
3686 for (; offset < size; ++offset)
3687 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3691 * The offset for a special static variable is composed of three parts:
3692 * a bit that indicates the type of static data (0:thread, 1:context),
3693 * an index in the array of chunks of memory for the thread (thread->static_data)
3694 * and an offset in that chunk of mem. This allows allocating less memory in the
3699 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int max_set)
3702 if (static_type == SPECIAL_STATIC_THREAD) {
3703 MonoThreadDomainTls *item;
3704 mono_threads_lock ();
3705 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3706 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3708 offset = item->offset;
3711 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3713 update_tls_reference_bitmap (offset, bitmap, max_set);
3714 /* This can be called during startup */
3715 if (threads != NULL)
3716 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3717 mono_threads_unlock ();
3719 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3720 mono_contexts_lock ();
3721 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3722 mono_contexts_unlock ();
3723 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3729 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3731 /* The high bit means either thread (0) or static (1) data. */
3733 guint32 static_type = (offset & 0x80000000);
3736 offset &= 0x7fffffff;
3737 idx = (offset >> 24) - 1;
3739 if (static_type == 0) {
3740 return get_thread_static_data (thread, offset);
3742 /* Allocate static data block under demand, since we don't have a list
3745 MonoAppContext *context = mono_context_get ();
3746 if (!context->static_data || !context->static_data [idx]) {
3747 mono_contexts_lock ();
3748 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3749 mono_contexts_unlock ();
3751 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3756 mono_get_special_static_data (guint32 offset)
3758 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3767 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3769 MonoInternalThread *thread = value;
3770 TlsOffsetSize *data = user;
3771 int idx = (data->offset >> 24) - 1;
3774 if (!thread->static_data || !thread->static_data [idx])
3776 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3777 memset (ptr, 0, data->size);
3781 do_free_special_slot (guint32 offset, guint32 size)
3783 guint32 static_type = (offset & 0x80000000);
3784 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3785 if (static_type == 0) {
3787 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3788 data.offset = offset & 0x7fffffff;
3790 clear_reference_bitmap (data.offset, data.size);
3791 if (threads != NULL)
3792 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3793 item->offset = offset;
3796 if (!mono_runtime_is_shutting_down ()) {
3797 item->next = thread_static_info.freelist;
3798 thread_static_info.freelist = item;
3800 /* We could be called during shutdown after mono_thread_cleanup () is called */
3804 /* FIXME: free context static data as well */
3809 do_free_special (gpointer key, gpointer value, gpointer data)
3811 MonoClassField *field = key;
3812 guint32 offset = GPOINTER_TO_UINT (value);
3815 size = mono_type_size (field->type, &align);
3816 do_free_special_slot (offset, size);
3820 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3822 mono_threads_lock ();
3823 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3824 mono_threads_unlock ();
3828 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3830 mono_threads_lock ();
3831 do_free_special_slot (offset, size);
3832 mono_threads_unlock ();
3836 * allocates room in the thread local area for storing an instance of the struct type
3837 * the allocation is kept track of in domain->tlsrec_list.
3840 mono_thread_alloc_tls (MonoReflectionType *type)
3842 MonoDomain *domain = mono_domain_get ();
3844 MonoTlsDataRecord *tlsrec;
3847 gsize default_bitmap [4] = {0};
3848 uint32_t tls_offset;
3852 klass = mono_class_from_mono_type (type->type);
3853 /* TlsDatum is a struct, so we subtract the object header size offset */
3854 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3855 size = mono_type_size (type->type, &align);
3856 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, bitmap, max_set);
3857 if (bitmap != default_bitmap)
3859 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3860 tlsrec->tls_offset = tls_offset;
3861 tlsrec->size = size;
3862 mono_domain_lock (domain);
3863 tlsrec->next = domain->tlsrec_list;
3864 domain->tlsrec_list = tlsrec;
3865 mono_domain_unlock (domain);
3870 mono_thread_destroy_tls (uint32_t tls_offset)
3872 MonoTlsDataRecord *prev = NULL;
3873 MonoTlsDataRecord *cur;
3875 MonoDomain *domain = mono_domain_get ();
3876 mono_domain_lock (domain);
3877 cur = domain->tlsrec_list;
3879 if (cur->tls_offset == tls_offset) {
3881 prev->next = cur->next;
3883 domain->tlsrec_list = cur->next;
3891 mono_domain_unlock (domain);
3893 mono_special_static_data_free_slot (tls_offset, size);
3897 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3900 mono_thread_destroy_domain_tls (MonoDomain *domain)
3902 while (domain->tlsrec_list)
3903 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3906 static MonoClassField *local_slots = NULL;
3909 /* local tls data to get locals_slot from a thread */
3912 /* index in the locals_slot array */
3917 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3919 LocalSlotID *sid = user_data;
3920 MonoInternalThread *thread = (MonoInternalThread*)value;
3921 MonoArray *slots_array;
3923 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3924 * it is for the right domain, so we need to check if it is allocated an initialized
3925 * for the current thread.
3927 /*g_print ("handling thread %p\n", thread);*/
3928 if (!thread->static_data || !thread->static_data [sid->idx])
3930 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3931 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3933 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3937 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3945 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3947 g_warning ("local_slots field not found in Thread class");
3951 domain = mono_domain_get ();
3952 mono_domain_lock (domain);
3953 if (domain->special_static_fields)
3954 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3955 mono_domain_unlock (domain);
3958 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3959 sid.offset = GPOINTER_TO_UINT (addr);
3960 sid.offset &= 0x7fffffff;
3961 sid.idx = (sid.offset >> 24) - 1;
3962 mono_threads_lock ();
3963 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3964 mono_threads_unlock ();
3966 /* FIXME: clear the slot for MonoAppContexts, too */
3971 static void CALLBACK dummy_apc (ULONG_PTR param)
3975 static guint32 dummy_apc (gpointer param)
3982 * mono_thread_execute_interruption
3984 * Performs the operation that the requested thread state requires (abort,
3987 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
3989 ensure_synch_cs_set (thread);
3991 EnterCriticalSection (thread->synch_cs);
3993 /* MonoThread::interruption_requested can only be changed with atomics */
3994 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
3995 /* this will consume pending APC calls */
3996 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
3997 InterlockedDecrement (&thread_interruption_requested);
3999 /* Clear the interrupted flag of the thread so it can wait again */
4000 wapi_clear_interruption ();
4004 if ((thread->state & ThreadState_AbortRequested) != 0) {
4005 LeaveCriticalSection (thread->synch_cs);
4006 if (thread->abort_exc == NULL) {
4008 * This might be racy, but it has to be called outside the lock
4009 * since it calls managed code.
4011 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4013 return thread->abort_exc;
4015 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4016 thread->state &= ~ThreadState_SuspendRequested;
4017 thread->state |= ThreadState_Suspended;
4018 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4019 if (thread->suspend_event == NULL) {
4020 LeaveCriticalSection (thread->synch_cs);
4023 if (thread->suspended_event)
4024 SetEvent (thread->suspended_event);
4026 LeaveCriticalSection (thread->synch_cs);
4028 if (shutting_down) {
4029 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4034 WaitForSingleObject (thread->suspend_event, INFINITE);
4036 EnterCriticalSection (thread->synch_cs);
4038 CloseHandle (thread->suspend_event);
4039 thread->suspend_event = NULL;
4040 thread->state &= ~ThreadState_Suspended;
4042 /* The thread that requested the resume will have replaced this event
4043 * and will be waiting for it
4045 SetEvent (thread->resume_event);
4047 LeaveCriticalSection (thread->synch_cs);
4051 else if ((thread->state & ThreadState_StopRequested) != 0) {
4052 /* FIXME: do this through the JIT? */
4054 LeaveCriticalSection (thread->synch_cs);
4056 mono_thread_exit ();
4058 } else if (thread->thread_interrupt_requested) {
4060 thread->thread_interrupt_requested = FALSE;
4061 LeaveCriticalSection (thread->synch_cs);
4063 return(mono_get_exception_thread_interrupted ());
4066 LeaveCriticalSection (thread->synch_cs);
4072 * mono_thread_request_interruption
4074 * A signal handler can call this method to request the interruption of a
4075 * thread. The result of the interruption will depend on the current state of
4076 * the thread. If the result is an exception that needs to be throw, it is
4077 * provided as return value.
4080 mono_thread_request_interruption (gboolean running_managed)
4082 MonoInternalThread *thread = mono_thread_internal_current ();
4084 /* The thread may already be stopping */
4089 if (thread->interrupt_on_stop &&
4090 thread->state & ThreadState_StopRequested &&
4091 thread->state & ThreadState_Background)
4095 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4098 if (!running_managed || is_running_protected_wrapper ()) {
4099 /* Can't stop while in unmanaged code. Increase the global interruption
4100 request count. When exiting the unmanaged method the count will be
4101 checked and the thread will be interrupted. */
4103 InterlockedIncrement (&thread_interruption_requested);
4105 if (mono_thread_notify_pending_exc_fn && !running_managed)
4106 /* The JIT will notify the thread about the interruption */
4107 /* This shouldn't take any locks */
4108 mono_thread_notify_pending_exc_fn ();
4110 /* this will awake the thread if it is in WaitForSingleObject
4112 /* Our implementation of this function ignores the func argument */
4113 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4117 return mono_thread_execute_interruption (thread);
4121 /*This function should be called by a thread after it has exited all of
4122 * its handle blocks at interruption time.*/
4124 mono_thread_resume_interruption (void)
4126 MonoInternalThread *thread = mono_thread_internal_current ();
4127 gboolean still_aborting;
4129 /* The thread may already be stopping */
4133 ensure_synch_cs_set (thread);
4134 EnterCriticalSection (thread->synch_cs);
4135 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4136 LeaveCriticalSection (thread->synch_cs);
4138 /*This can happen if the protected block called Thread::ResetAbort*/
4139 if (!still_aborting)
4142 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4144 InterlockedIncrement (&thread_interruption_requested);
4147 wapi_self_interrupt ();
4149 return mono_thread_execute_interruption (thread);
4152 gboolean mono_thread_interruption_requested ()
4154 if (thread_interruption_requested) {
4155 MonoInternalThread *thread = mono_thread_internal_current ();
4156 /* The thread may already be stopping */
4158 return (thread->interruption_requested);
4163 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4165 MonoInternalThread *thread = mono_thread_internal_current ();
4167 /* The thread may already be stopping */
4171 mono_debugger_check_interruption ();
4173 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4174 MonoException* exc = mono_thread_execute_interruption (thread);
4175 if (exc) mono_raise_exception (exc);
4180 * Performs the interruption of the current thread, if one has been requested,
4181 * and the thread is not running a protected wrapper.
4183 void mono_thread_interruption_checkpoint ()
4185 mono_thread_interruption_checkpoint_request (FALSE);
4189 * Performs the interruption of the current thread, if one has been requested.
4191 void mono_thread_force_interruption_checkpoint ()
4193 mono_thread_interruption_checkpoint_request (TRUE);
4197 * mono_thread_get_and_clear_pending_exception:
4199 * Return any pending exceptions for the current thread and clear it as a side effect.
4202 mono_thread_get_and_clear_pending_exception (void)
4204 MonoInternalThread *thread = mono_thread_internal_current ();
4206 /* The thread may already be stopping */
4210 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4211 return mono_thread_execute_interruption (thread);
4214 if (thread->pending_exception) {
4215 MonoException *exc = thread->pending_exception;
4217 thread->pending_exception = NULL;
4225 * mono_set_pending_exception:
4227 * Set the pending exception of the current thread to EXC. On platforms which
4228 * support it, the exception will be thrown when execution returns to managed code.
4229 * On other platforms, this function is equivalent to mono_raise_exception ().
4230 * Internal calls which report exceptions using this function instead of
4231 * raise_exception () might be called by JITted code using a more efficient calling
4235 mono_set_pending_exception (MonoException *exc)
4237 MonoInternalThread *thread = mono_thread_internal_current ();
4239 /* The thread may already be stopping */
4243 if (mono_thread_notify_pending_exc_fn) {
4244 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4246 mono_thread_notify_pending_exc_fn ();
4248 /* No way to notify the JIT about the exception, have to throw it now */
4249 mono_raise_exception (exc);
4254 * mono_thread_interruption_request_flag:
4256 * Returns the address of a flag that will be non-zero if an interruption has
4257 * been requested for a thread. The thread to interrupt may not be the current
4258 * thread, so an additional call to mono_thread_interruption_requested() or
4259 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4262 gint32* mono_thread_interruption_request_flag ()
4264 return &thread_interruption_requested;
4268 mono_thread_init_apartment_state (void)
4271 MonoInternalThread* thread = mono_thread_internal_current ();
4273 /* Positive return value indicates success, either
4274 * S_OK if this is first CoInitialize call, or
4275 * S_FALSE if CoInitialize already called, but with same
4276 * threading model. A negative value indicates failure,
4277 * probably due to trying to change the threading model.
4279 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4280 ? COINIT_APARTMENTTHREADED
4281 : COINIT_MULTITHREADED) < 0) {
4282 thread->apartment_state = ThreadApartmentState_Unknown;
4288 mono_thread_cleanup_apartment_state (void)
4291 MonoInternalThread* thread = mono_thread_internal_current ();
4293 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4300 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4302 ensure_synch_cs_set (thread);
4304 EnterCriticalSection (thread->synch_cs);
4305 thread->state |= state;
4306 LeaveCriticalSection (thread->synch_cs);
4310 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4312 ensure_synch_cs_set (thread);
4314 EnterCriticalSection (thread->synch_cs);
4315 thread->state &= ~state;
4316 LeaveCriticalSection (thread->synch_cs);
4320 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4322 gboolean ret = FALSE;
4324 ensure_synch_cs_set (thread);
4326 EnterCriticalSection (thread->synch_cs);
4328 if ((thread->state & test) != 0) {
4332 LeaveCriticalSection (thread->synch_cs);
4337 static MonoClassField *execution_context_field;
4340 get_execution_context_addr (void)
4342 MonoDomain *domain = mono_domain_get ();
4345 if (!execution_context_field) {
4346 execution_context_field = mono_class_get_field_from_name (mono_defaults.thread_class,
4348 g_assert (execution_context_field);
4351 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4353 mono_domain_lock (domain);
4354 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, execution_context_field));
4355 mono_domain_unlock (domain);
4358 return (MonoObject**) mono_get_special_static_data (offset);
4362 mono_thread_get_execution_context (void)
4364 return *get_execution_context_addr ();
4368 mono_thread_set_execution_context (MonoObject *ec)
4370 *get_execution_context_addr () = ec;
4373 static gboolean has_tls_get = FALSE;
4376 mono_runtime_set_has_tls_get (gboolean val)
4382 mono_runtime_has_tls_get (void)
4388 mono_thread_kill (MonoInternalThread *thread, int signal)
4391 /* Win32 uses QueueUserAPC and callers of this are guarded */
4392 g_assert_not_reached ();
4394 # ifdef PTHREAD_POINTER_ID
4395 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4397 # ifdef PLATFORM_ANDROID
4398 if (thread->android_tid != 0) {
4400 int old_errno = errno;
4402 ret = tkill ((pid_t) thread->android_tid, signal);
4411 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4413 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());