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 #include <mono/metadata/object.h>
20 #include <mono/metadata/domain-internals.h>
21 #include <mono/metadata/profiler-private.h>
22 #include <mono/metadata/threads.h>
23 #include <mono/metadata/threadpool.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internal.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/io-layer/io-layer.h>
31 #ifndef PLATFORM_WIN32
32 #include <mono/io-layer/threads.h>
34 #include <mono/metadata/object-internals.h>
35 #include <mono/metadata/mono-debug-debugger.h>
36 #include <mono/utils/mono-compiler.h>
37 #include <mono/utils/mono-mmap.h>
38 #include <mono/utils/mono-membar.h>
39 #include <mono/utils/mono-time.h>
41 #include <mono/metadata/gc-internal.h>
43 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
44 #define THREAD_DEBUG(a)
45 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
46 #define THREAD_WAIT_DEBUG(a)
47 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
48 #define LIBGC_DEBUG(a)
50 /* Provide this for systems with glib < 2.6 */
51 #ifndef G_GSIZE_FORMAT
52 # if GLIB_SIZEOF_LONG == 8
53 # define G_GSIZE_FORMAT "lu"
55 # define G_GSIZE_FORMAT "u"
61 guint32 (*func)(void *);
78 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
79 struct _MonoThreadDomainTls {
80 MonoThreadDomainTls *next;
88 MonoThreadDomainTls *freelist;
93 MonoHazardousFreeFunc free_func;
96 /* Number of cached culture objects in the MonoThread->cached_culture_info array
97 * (per-type): we use the first NUM entries for CultureInfo and the last for
98 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
100 #define NUM_CACHED_CULTURES 4
101 #define CULTURES_START_IDX 0
102 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
104 /* Controls access to the 'threads' hash table */
105 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
106 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
107 static CRITICAL_SECTION threads_mutex;
109 /* Controls access to context static data */
110 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
111 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
112 static CRITICAL_SECTION contexts_mutex;
114 /* Holds current status of static data heap */
115 static StaticDataInfo thread_static_info;
116 static StaticDataInfo context_static_info;
118 /* The hash of existing threads (key is thread ID) that need joining
121 static MonoGHashTable *threads=NULL;
124 * Threads which are starting up and they are not in the 'threads' hash yet.
125 * When handle_store is called for a thread, it will be removed from this hash table.
126 * Protected by mono_threads_lock ().
128 static MonoGHashTable *threads_starting_up = NULL;
130 /* The TLS key that holds the MonoObject assigned to each thread */
131 static guint32 current_object_key = -1;
133 #ifdef HAVE_KW_THREAD
134 /* we need to use both the Tls* functions and __thread because
135 * the gc needs to see all the threads
137 static __thread MonoThread * tls_current_object MONO_TLS_FAST;
138 #define SET_CURRENT_OBJECT(x) do { \
139 tls_current_object = x; \
140 TlsSetValue (current_object_key, x); \
142 #define GET_CURRENT_OBJECT() tls_current_object
144 #define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x);
145 #define GET_CURRENT_OBJECT() (MonoThread*) TlsGetValue (current_object_key);
148 /* function called at thread start */
149 static MonoThreadStartCB mono_thread_start_cb = NULL;
151 /* function called at thread attach */
152 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
154 /* function called at thread cleanup */
155 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
157 /* function called to notify the runtime about a pending exception on the current thread */
158 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
160 /* The default stack size for each thread */
161 static guint32 default_stacksize = 0;
162 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
164 static void thread_adjust_static_data (MonoThread *thread);
165 static void mono_init_static_data_info (StaticDataInfo *static_data);
166 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
167 static gboolean mono_thread_resume (MonoThread* thread);
168 static void mono_thread_start (MonoThread *thread);
169 static void signal_thread_state_change (MonoThread *thread);
171 static MonoException* mono_thread_execute_interruption (MonoThread *thread);
173 /* Spin lock for InterlockedXXX 64 bit functions */
174 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
175 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
176 static CRITICAL_SECTION interlocked_mutex;
178 /* global count of thread interruptions requested */
179 static gint32 thread_interruption_requested = 0;
181 /* Event signaled when a thread changes its background mode */
182 static HANDLE background_change_event;
184 /* The table for small ID assignment */
185 static CRITICAL_SECTION small_id_mutex;
186 static int small_id_table_size = 0;
187 static int small_id_next = 0;
188 static int highest_small_id = -1;
189 static MonoThread **small_id_table = NULL;
191 /* The hazard table */
192 #define HAZARD_TABLE_MAX_SIZE 16384 /* There cannot be more threads than this number. */
193 static volatile int hazard_table_size = 0;
194 static MonoThreadHazardPointers * volatile hazard_table = NULL;
196 /* The table where we keep pointers to blocks to be freed but that
197 have to wait because they're guarded by a hazard pointer. */
198 static CRITICAL_SECTION delayed_free_table_mutex;
199 static GArray *delayed_free_table = NULL;
201 static gboolean shutting_down = FALSE;
204 mono_thread_get_tls_key (void)
206 return current_object_key;
210 mono_thread_get_tls_offset (void)
213 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
217 /* handle_store() and handle_remove() manage the array of threads that
218 * still need to be waited for when the main thread exits.
220 * If handle_store() returns FALSE the thread must not be started
221 * because Mono is shutting down.
223 static gboolean handle_store(MonoThread *thread)
225 mono_threads_lock ();
227 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->tid));
229 if (threads_starting_up)
230 mono_g_hash_table_remove (threads_starting_up, thread);
233 mono_threads_unlock ();
238 MONO_GC_REGISTER_ROOT (threads);
239 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
242 /* We don't need to duplicate thread->handle, because it is
243 * only closed when the thread object is finalized by the GC.
245 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->tid),
248 mono_threads_unlock ();
253 static gboolean handle_remove(MonoThread *thread)
256 gsize tid = thread->tid;
258 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
260 mono_threads_lock ();
263 /* We have to check whether the thread object for the
264 * tid is still the same in the table because the
265 * thread might have been destroyed and the tid reused
266 * in the meantime, in which case the tid would be in
267 * the table, but with another thread object.
269 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
270 mono_g_hash_table_remove (threads, (gpointer)tid);
279 mono_threads_unlock ();
281 /* Don't close the handle here, wait for the object finalizer
282 * to do it. Otherwise, the following race condition applies:
284 * 1) Thread exits (and handle_remove() closes the handle)
286 * 2) Some other handle is reassigned the same slot
288 * 3) Another thread tries to join the first thread, and
289 * blocks waiting for the reassigned handle to be signalled
290 * (which might never happen). This is possible, because the
291 * thread calling Join() still has a reference to the first
298 * Allocate a small thread id.
300 * FIXME: The biggest part of this function is very similar to
301 * domain_id_alloc() in domain.c and should be merged.
304 small_id_alloc (MonoThread *thread)
308 EnterCriticalSection (&small_id_mutex);
310 if (!small_id_table) {
311 small_id_table_size = 2;
312 small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoThread*), NULL);
314 for (i = small_id_next; i < small_id_table_size; ++i) {
315 if (!small_id_table [i]) {
321 for (i = 0; i < small_id_next; ++i) {
322 if (!small_id_table [i]) {
329 MonoThread **new_table;
330 int new_size = small_id_table_size * 2;
331 if (new_size >= (1 << 16))
332 g_assert_not_reached ();
333 id = small_id_table_size;
334 new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoThread*), NULL);
335 memcpy (new_table, small_id_table, small_id_table_size * sizeof (void*));
336 mono_gc_free_fixed (small_id_table);
337 small_id_table = new_table;
338 small_id_table_size = new_size;
340 thread->small_id = id;
341 g_assert (small_id_table [id] == NULL);
342 small_id_table [id] = thread;
344 if (small_id_next > small_id_table_size)
347 if (id >= hazard_table_size) {
349 int pagesize = mono_pagesize ();
350 int num_pages = (hazard_table_size * sizeof (MonoThreadHazardPointers) + pagesize - 1) / pagesize;
352 if (hazard_table == NULL) {
353 hazard_table = mono_valloc (NULL,
354 sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE,
358 g_assert (hazard_table != NULL);
359 page_addr = (guint8*)hazard_table + num_pages * pagesize;
361 g_assert (id < HAZARD_TABLE_MAX_SIZE);
363 mono_mprotect (page_addr, pagesize, MONO_MMAP_READ | MONO_MMAP_WRITE);
366 hazard_table_size = num_pages * pagesize / sizeof (MonoThreadHazardPointers);
368 g_assert (id < hazard_table_size);
370 hazard_table [id].hazard_pointers [0] = NULL;
371 hazard_table [id].hazard_pointers [1] = NULL;
374 if (id > highest_small_id) {
375 highest_small_id = id;
376 mono_memory_write_barrier ();
379 LeaveCriticalSection (&small_id_mutex);
385 small_id_free (int id)
387 g_assert (id >= 0 && id < small_id_table_size);
388 g_assert (small_id_table [id] != NULL);
390 small_id_table [id] = NULL;
394 is_pointer_hazardous (gpointer p)
397 int highest = highest_small_id;
399 g_assert (highest < hazard_table_size);
401 for (i = 0; i <= highest; ++i) {
402 if (hazard_table [i].hazard_pointers [0] == p
403 || hazard_table [i].hazard_pointers [1] == p)
410 MonoThreadHazardPointers*
411 mono_hazard_pointer_get (void)
413 MonoThread *current_thread = mono_thread_current ();
415 if (!(current_thread && current_thread->small_id >= 0)) {
416 static MonoThreadHazardPointers emerg_hazard_table;
417 g_warning ("Thread %p may have been prematurely finalized", current_thread);
418 return &emerg_hazard_table;
421 return &hazard_table [current_thread->small_id];
425 try_free_delayed_free_item (int index)
427 if (delayed_free_table->len > index) {
428 DelayedFreeItem item = { NULL, NULL };
430 EnterCriticalSection (&delayed_free_table_mutex);
431 /* We have to check the length again because another
432 thread might have freed an item before we acquired
434 if (delayed_free_table->len > index) {
435 item = g_array_index (delayed_free_table, DelayedFreeItem, index);
437 if (!is_pointer_hazardous (item.p))
438 g_array_remove_index_fast (delayed_free_table, index);
442 LeaveCriticalSection (&delayed_free_table_mutex);
445 item.free_func (item.p);
450 mono_thread_hazardous_free_or_queue (gpointer p, MonoHazardousFreeFunc free_func)
454 /* First try to free a few entries in the delayed free
456 for (i = 2; i >= 0; --i)
457 try_free_delayed_free_item (i);
459 /* Now see if the pointer we're freeing is hazardous. If it
460 isn't, free it. Otherwise put it in the delay list. */
461 if (is_pointer_hazardous (p)) {
462 DelayedFreeItem item = { p, free_func };
464 ++mono_stats.hazardous_pointer_count;
466 EnterCriticalSection (&delayed_free_table_mutex);
467 g_array_append_val (delayed_free_table, item);
468 LeaveCriticalSection (&delayed_free_table_mutex);
474 mono_thread_hazardous_try_free_all (void)
479 if (!delayed_free_table)
482 len = delayed_free_table->len;
484 for (i = len - 1; i >= 0; --i)
485 try_free_delayed_free_item (i);
488 static void ensure_synch_cs_set (MonoThread *thread)
490 CRITICAL_SECTION *synch_cs;
492 if (thread->synch_cs != NULL) {
496 synch_cs = g_new0 (CRITICAL_SECTION, 1);
497 InitializeCriticalSection (synch_cs);
499 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
500 synch_cs, NULL) != NULL) {
501 /* Another thread must have installed this CS */
502 DeleteCriticalSection (synch_cs);
508 * NOTE: this function can be called also for threads different from the current one:
509 * make sure no code called from it will ever assume it is run on the thread that is
510 * getting cleaned up.
512 static void thread_cleanup (MonoThread *thread)
514 g_assert (thread != NULL);
516 if (thread->abort_state_handle) {
517 g_assert (thread->abort_exc);
518 mono_gchandle_free (thread->abort_state_handle);
519 thread->abort_state_handle = 0;
521 thread->abort_exc = NULL;
522 thread->current_appcontext = NULL;
524 /* if the thread is not in the hash it has been removed already */
525 if (!handle_remove (thread))
527 mono_release_type_locks (thread);
529 EnterCriticalSection (thread->synch_cs);
531 thread->state |= ThreadState_Stopped;
532 thread->state &= ~ThreadState_Background;
534 LeaveCriticalSection (thread->synch_cs);
536 mono_profiler_thread_end (thread->tid);
538 if (thread == mono_thread_current ())
539 mono_thread_pop_appdomain_ref ();
541 if (thread->serialized_culture_info)
542 g_free (thread->serialized_culture_info);
544 g_free (thread->name);
546 thread->cached_culture_info = NULL;
548 mono_gc_free_fixed (thread->static_data);
549 thread->static_data = NULL;
551 if (mono_thread_cleanup_fn)
552 mono_thread_cleanup_fn (thread);
554 small_id_free (thread->small_id);
555 thread->small_id = -2;
558 static guint32 WINAPI start_wrapper(void *data)
560 struct StartInfo *start_info=(struct StartInfo *)data;
561 guint32 (*start_func)(void *);
564 MonoThread *thread=start_info->obj;
565 MonoObject *start_delegate = start_info->delegate;
567 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
569 /* We can be sure start_info->obj->tid and
570 * start_info->obj->handle have been set, because the thread
571 * was created suspended, and these values were set before the
577 SET_CURRENT_OBJECT (thread);
579 mono_monitor_init_tls ();
581 /* Every thread references the appdomain which created it */
582 mono_thread_push_appdomain_ref (start_info->domain);
584 if (!mono_domain_set (start_info->domain, FALSE)) {
585 /* No point in raising an appdomain_unloaded exception here */
586 /* FIXME: Cleanup here */
587 mono_thread_pop_appdomain_ref ();
591 start_func = start_info->func;
592 start_arg = start_info->start_arg;
594 /* This MUST be called before any managed code can be
595 * executed, as it calls the callback function that (for the
596 * jit) sets the lmf marker.
598 mono_thread_new_init (tid, &tid, start_func);
599 thread->stack_ptr = &tid;
601 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
603 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
605 mono_profiler_thread_start (tid);
607 /* On 2.0 profile (and higher), set explicitly since state might have been
609 if (mono_framework_version () != 1) {
610 if (thread->apartment_state == ThreadApartmentState_Unknown)
611 thread->apartment_state = ThreadApartmentState_MTA;
614 mono_thread_init_apartment_state ();
616 if(thread->start_notify!=NULL) {
617 /* Let the thread that called Start() know we're
620 ReleaseSemaphore (thread->start_notify, 1, NULL);
623 MONO_GC_UNREGISTER_ROOT (start_info->start_arg);
626 thread_adjust_static_data (thread);
628 g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
632 mono_thread_set_execution_context (thread->ec_to_set);
634 /* start_func is set only for unmanaged start functions */
636 start_func (start_arg);
639 g_assert (start_delegate != NULL);
640 args [0] = start_arg;
641 /* we may want to handle the exception here. See comment below on unhandled exceptions */
642 mono_runtime_delegate_invoke (start_delegate, args, NULL);
645 /* If the thread calls ExitThread at all, this remaining code
646 * will not be executed, but the main thread will eventually
647 * call thread_cleanup() on this thread's behalf.
650 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
652 thread_cleanup (thread);
654 /* Do any cleanup needed for apartment state. This
655 * cannot be done in thread_cleanup since thread_cleanup could be
656 * called for a thread other than the current thread.
657 * mono_thread_cleanup_apartment_state cleans up apartment
658 * for the current thead */
659 mono_thread_cleanup_apartment_state ();
661 /* Remove the reference to the thread object in the TLS data,
662 * so the thread object can be finalized. This won't be
663 * reached if the thread threw an uncaught exception, so those
664 * thread handles will stay referenced :-( (This is due to
665 * missing support for scanning thread-specific data in the
666 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
669 SET_CURRENT_OBJECT (NULL);
674 void mono_thread_new_init (gsize tid, gpointer stack_start, gpointer func)
676 if (mono_thread_start_cb) {
677 mono_thread_start_cb (tid, stack_start, func);
681 void mono_threads_set_default_stacksize (guint32 stacksize)
683 default_stacksize = stacksize;
686 guint32 mono_threads_get_default_stacksize (void)
688 return default_stacksize;
692 * mono_create_thread:
694 * This is a wrapper around CreateThread which handles differences in the type of
695 * the the 'tid' argument.
697 gpointer mono_create_thread (WapiSecurityAttributes *security,
698 guint32 stacksize, WapiThreadStart start,
699 gpointer param, guint32 create, gsize *tid)
703 #ifdef PLATFORM_WIN32
706 res = CreateThread (security, stacksize, start, param, create, &real_tid);
710 res = CreateThread (security, stacksize, start, param, create, tid);
716 MonoThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread)
719 HANDLE thread_handle;
720 struct StartInfo *start_info;
723 thread=(MonoThread *)mono_object_new (domain,
724 mono_defaults.thread_class);
726 start_info=g_new0 (struct StartInfo, 1);
727 start_info->func = func;
728 start_info->obj = thread;
729 start_info->domain = domain;
730 start_info->start_arg = arg;
733 * The argument may be an object reference, and there is no ref to keep it alive
734 * when the new thread is started but not yet registered with the collector.
736 MONO_GC_REGISTER_ROOT (start_info->start_arg);
738 mono_threads_lock ();
740 mono_threads_unlock ();
743 if (threads_starting_up == NULL) {
744 MONO_GC_REGISTER_ROOT (threads_starting_up);
745 threads_starting_up = mono_g_hash_table_new (NULL, NULL);
747 mono_g_hash_table_insert (threads_starting_up, thread, thread);
748 mono_threads_unlock ();
750 /* Create suspended, so we can do some housekeeping before the thread
753 thread_handle = mono_create_thread (NULL, default_stacksize_for_thread (thread), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
754 CREATE_SUSPENDED, &tid);
755 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
756 if (thread_handle == NULL) {
757 /* The thread couldn't be created, so throw an exception */
758 MONO_GC_UNREGISTER_ROOT (start_info->start_arg);
759 mono_threads_lock ();
760 mono_g_hash_table_remove (threads_starting_up, thread);
761 mono_threads_unlock ();
763 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
767 thread->handle=thread_handle;
769 thread->apartment_state=ThreadApartmentState_Unknown;
770 small_id_alloc (thread);
772 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
773 InitializeCriticalSection (thread->synch_cs);
775 thread->threadpool_thread = threadpool_thread;
776 if (threadpool_thread)
777 mono_thread_set_state (thread, ThreadState_Background);
779 if (handle_store (thread))
780 ResumeThread (thread_handle);
786 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
788 mono_thread_create_internal (domain, func, arg, FALSE);
792 * mono_thread_get_stack_bounds:
794 * Return the address and size of the current threads stack. Return NULL as the
795 * stack address if the stack address cannot be determined.
798 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
800 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
801 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
802 *stsize = pthread_get_stacksize_np (pthread_self ());
803 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
805 /* FIXME: simplify the mess below */
806 #elif !defined(PLATFORM_WIN32)
808 guint8 *current = (guint8*)&attr;
810 pthread_attr_init (&attr);
811 # ifdef HAVE_PTHREAD_GETATTR_NP
812 pthread_getattr_np (pthread_self(), &attr);
814 # ifdef HAVE_PTHREAD_ATTR_GET_NP
815 pthread_attr_get_np (pthread_self(), &attr);
818 pthread_attr_getstacksize (&attr, &stsize);
827 pthread_attr_getstack (&attr, (void**)staddr, stsize);
829 g_assert ((current > *staddr) && (current < *staddr + *stsize));
832 pthread_attr_destroy (&attr);
835 /* When running under emacs, sometimes staddr is not aligned to a page size */
836 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
840 mono_thread_attach (MonoDomain *domain)
843 HANDLE thread_handle;
846 if ((thread = mono_thread_current ())) {
847 if (domain != mono_domain_get ())
848 mono_domain_set (domain, TRUE);
849 /* Already attached */
853 if (!mono_gc_register_thread (&domain)) {
854 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 ());
857 thread = (MonoThread *)mono_object_new (domain,
858 mono_defaults.thread_class);
860 thread_handle = GetCurrentThread ();
861 g_assert (thread_handle);
863 tid=GetCurrentThreadId ();
866 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
867 * refer to the thread from other threads for things like aborting.
869 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
870 THREAD_ALL_ACCESS, TRUE, 0);
872 thread->handle=thread_handle;
874 thread->apartment_state=ThreadApartmentState_Unknown;
875 small_id_alloc (thread);
876 thread->stack_ptr = &tid;
878 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
879 InitializeCriticalSection (thread->synch_cs);
881 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
883 if (!handle_store (thread)) {
884 /* Mono is shutting down, so just wait for the end */
889 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
891 SET_CURRENT_OBJECT (thread);
892 mono_domain_set (domain, TRUE);
894 mono_monitor_init_tls ();
896 thread_adjust_static_data (thread);
898 if (mono_thread_attach_cb) {
902 mono_thread_get_stack_bounds (&staddr, &stsize);
905 mono_thread_attach_cb (tid, &tid);
907 mono_thread_attach_cb (tid, staddr + stsize);
914 mono_thread_detach (MonoThread *thread)
916 g_return_if_fail (thread != NULL);
918 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
920 thread_cleanup (thread);
922 SET_CURRENT_OBJECT (NULL);
924 /* Don't need to CloseHandle this thread, even though we took a
925 * reference in mono_thread_attach (), because the GC will do it
926 * when the Thread object is finalised.
933 MonoThread *thread = mono_thread_current ();
935 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
937 thread_cleanup (thread);
938 SET_CURRENT_OBJECT (NULL);
940 /* we could add a callback here for embedders to use. */
941 if (thread == mono_thread_get_main ())
942 exit (mono_environment_exitcode_get ());
946 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
949 guint32 (*start_func)(void *);
950 struct StartInfo *start_info;
956 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
958 ensure_synch_cs_set (this);
960 EnterCriticalSection (this->synch_cs);
962 if ((this->state & ThreadState_Unstarted) == 0) {
963 LeaveCriticalSection (this->synch_cs);
964 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
970 if ((this->state & ThreadState_Aborted) != 0) {
971 LeaveCriticalSection (this->synch_cs);
976 /* This is freed in start_wrapper */
977 start_info = g_new0 (struct StartInfo, 1);
978 start_info->func = start_func;
979 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
980 start_info->delegate = start;
981 start_info->obj = this;
982 start_info->domain = mono_domain_get ();
984 this->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
985 if(this->start_notify==NULL) {
986 LeaveCriticalSection (this->synch_cs);
987 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
991 mono_threads_lock ();
992 if (threads_starting_up == NULL) {
993 MONO_GC_REGISTER_ROOT (threads_starting_up);
994 threads_starting_up = mono_g_hash_table_new (NULL, NULL);
996 mono_g_hash_table_insert (threads_starting_up, this, this);
997 mono_threads_unlock ();
999 thread=mono_create_thread(NULL, default_stacksize_for_thread (this), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1000 CREATE_SUSPENDED, &tid);
1002 LeaveCriticalSection (this->synch_cs);
1003 mono_threads_lock ();
1004 mono_g_hash_table_remove (threads_starting_up, this);
1005 mono_threads_unlock ();
1006 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1010 this->handle=thread;
1012 small_id_alloc (this);
1014 /* Don't call handle_store() here, delay it to Start.
1015 * We can't join a thread (trying to will just block
1016 * forever) until it actually starts running, so don't
1017 * store the handle till then.
1020 mono_thread_start (this);
1022 this->state &= ~ThreadState_Unstarted;
1024 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1026 LeaveCriticalSection (this->synch_cs);
1031 void ves_icall_System_Threading_Thread_Thread_init (MonoThread *this)
1033 MONO_ARCH_SAVE_REGS;
1035 ensure_synch_cs_set (this);
1038 void ves_icall_System_Threading_Thread_Thread_free_internal (MonoThread *this,
1041 MONO_ARCH_SAVE_REGS;
1043 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1045 CloseHandle (thread);
1047 DeleteCriticalSection (this->synch_cs);
1048 g_free (this->synch_cs);
1049 this->synch_cs = NULL;
1051 g_assert (!this->abort_exc && !this->abort_state_handle);
1054 static void mono_thread_start (MonoThread *thread)
1056 MONO_ARCH_SAVE_REGS;
1058 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1060 /* Only store the handle when the thread is about to be
1061 * launched, to avoid the main thread deadlocking while trying
1062 * to clean up a thread that will never be signalled.
1064 if (!handle_store (thread))
1067 ResumeThread (thread->handle);
1069 if(thread->start_notify!=NULL) {
1070 /* Wait for the thread to set up its TLS data etc, so
1071 * theres no potential race condition if someone tries
1072 * to look up the data believing the thread has
1076 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1078 WaitForSingleObjectEx (thread->start_notify, INFINITE, FALSE);
1079 CloseHandle (thread->start_notify);
1080 thread->start_notify = NULL;
1083 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1086 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1089 MonoThread *thread = mono_thread_current ();
1091 MONO_ARCH_SAVE_REGS;
1093 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1095 mono_thread_current_check_pending_interrupt ();
1097 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1099 res = SleepEx(ms,TRUE);
1101 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1103 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1104 MonoException* exc = mono_thread_execute_interruption (thread);
1105 if (exc) mono_raise_exception (exc);
1109 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1114 ves_icall_System_Threading_Thread_GetDomainID (void)
1116 MONO_ARCH_SAVE_REGS;
1118 return mono_domain_get()->domain_id;
1122 ves_icall_System_Threading_Thread_GetName_internal (MonoThread *this_obj)
1126 ensure_synch_cs_set (this_obj);
1128 EnterCriticalSection (this_obj->synch_cs);
1130 if (!this_obj->name)
1133 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1135 LeaveCriticalSection (this_obj->synch_cs);
1141 ves_icall_System_Threading_Thread_SetName_internal (MonoThread *this_obj, MonoString *name)
1143 ensure_synch_cs_set (this_obj);
1145 EnterCriticalSection (this_obj->synch_cs);
1147 if (this_obj->name) {
1148 LeaveCriticalSection (this_obj->synch_cs);
1150 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1154 this_obj->name = g_new (gunichar2, mono_string_length (name));
1155 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1156 this_obj->name_len = mono_string_length (name);
1159 this_obj->name = NULL;
1161 LeaveCriticalSection (this_obj->synch_cs);
1165 lookup_cached_culture (MonoThread *this, MonoDomain *domain, int start_idx)
1170 if (this->cached_culture_info) {
1171 domain = mono_domain_get ();
1172 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1173 res = mono_array_get (this->cached_culture_info, MonoObject*, i);
1174 if (res && res->vtable->domain == domain)
1183 ves_icall_System_Threading_Thread_GetCachedCurrentCulture (MonoThread *this)
1185 return lookup_cached_culture (this, mono_domain_get (), CULTURES_START_IDX);
1189 ves_icall_System_Threading_Thread_GetSerializedCurrentCulture (MonoThread *this)
1193 ensure_synch_cs_set (this);
1195 EnterCriticalSection (this->synch_cs);
1197 if (this->serialized_culture_info) {
1198 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_culture_info_len);
1199 memcpy (mono_array_addr (res, guint8, 0), this->serialized_culture_info, this->serialized_culture_info_len);
1204 LeaveCriticalSection (this->synch_cs);
1210 cache_culture (MonoThread *this, MonoObject *culture, int start_idx)
1213 MonoDomain *domain = mono_domain_get ();
1216 int same_domain_slot = -1;
1218 ensure_synch_cs_set (this);
1220 EnterCriticalSection (this->synch_cs);
1222 if (!this->cached_culture_info)
1223 MONO_OBJECT_SETREF (this, cached_culture_info, mono_array_new_cached (mono_object_domain (this), mono_defaults.object_class, NUM_CACHED_CULTURES * 2));
1225 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1226 obj = mono_array_get (this->cached_culture_info, MonoObject*, i);
1230 /* we continue, because there may be a slot used with the same domain */
1234 if (obj->vtable->domain == domain) {
1235 same_domain_slot = i;
1239 if (same_domain_slot >= 0)
1240 mono_array_setref (this->cached_culture_info, same_domain_slot, culture);
1241 else if (free_slot >= 0)
1242 mono_array_setref (this->cached_culture_info, free_slot, culture);
1243 /* we may want to replace an existing entry here, even when no suitable slot is found */
1245 LeaveCriticalSection (this->synch_cs);
1249 ves_icall_System_Threading_Thread_SetCachedCurrentCulture (MonoThread *this, MonoObject *culture)
1251 cache_culture (this, culture, CULTURES_START_IDX);
1255 ves_icall_System_Threading_Thread_SetSerializedCurrentCulture (MonoThread *this, MonoArray *arr)
1257 ensure_synch_cs_set (this);
1259 EnterCriticalSection (this->synch_cs);
1261 if (this->serialized_culture_info)
1262 g_free (this->serialized_culture_info);
1263 this->serialized_culture_info = g_new0 (guint8, mono_array_length (arr));
1264 this->serialized_culture_info_len = mono_array_length (arr);
1265 memcpy (this->serialized_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1267 LeaveCriticalSection (this->synch_cs);
1272 ves_icall_System_Threading_Thread_GetCachedCurrentUICulture (MonoThread *this)
1274 return lookup_cached_culture (this, mono_domain_get (), UICULTURES_START_IDX);
1278 ves_icall_System_Threading_Thread_GetSerializedCurrentUICulture (MonoThread *this)
1282 ensure_synch_cs_set (this);
1284 EnterCriticalSection (this->synch_cs);
1286 if (this->serialized_ui_culture_info) {
1287 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_ui_culture_info_len);
1288 memcpy (mono_array_addr (res, guint8, 0), this->serialized_ui_culture_info, this->serialized_ui_culture_info_len);
1293 LeaveCriticalSection (this->synch_cs);
1299 ves_icall_System_Threading_Thread_SetCachedCurrentUICulture (MonoThread *this, MonoObject *culture)
1301 cache_culture (this, culture, UICULTURES_START_IDX);
1305 ves_icall_System_Threading_Thread_SetSerializedCurrentUICulture (MonoThread *this, MonoArray *arr)
1307 ensure_synch_cs_set (this);
1309 EnterCriticalSection (this->synch_cs);
1311 if (this->serialized_ui_culture_info)
1312 g_free (this->serialized_ui_culture_info);
1313 this->serialized_ui_culture_info = g_new0 (guint8, mono_array_length (arr));
1314 this->serialized_ui_culture_info_len = mono_array_length (arr);
1315 memcpy (this->serialized_ui_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1317 LeaveCriticalSection (this->synch_cs);
1320 /* the jit may read the compiled code of this function */
1322 mono_thread_current (void)
1324 MonoThread *res = GET_CURRENT_OBJECT ()
1325 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1329 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoThread *this,
1330 int ms, HANDLE thread)
1332 MonoThread *cur_thread = mono_thread_current ();
1335 MONO_ARCH_SAVE_REGS;
1337 mono_thread_current_check_pending_interrupt ();
1339 ensure_synch_cs_set (this);
1341 EnterCriticalSection (this->synch_cs);
1343 if ((this->state & ThreadState_Unstarted) != 0) {
1344 LeaveCriticalSection (this->synch_cs);
1346 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1350 LeaveCriticalSection (this->synch_cs);
1355 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1357 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1359 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1361 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1363 if(ret==WAIT_OBJECT_0) {
1364 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1369 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1374 /* FIXME: exitContext isnt documented */
1375 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1381 MonoObject *waitHandle;
1382 MonoThread *thread = mono_thread_current ();
1384 MONO_ARCH_SAVE_REGS;
1386 /* Do this WaitSleepJoin check before creating objects */
1387 mono_thread_current_check_pending_interrupt ();
1389 numhandles = mono_array_length(mono_handles);
1390 handles = g_new0(HANDLE, numhandles);
1392 for(i = 0; i < numhandles; i++) {
1393 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1394 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1401 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1403 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1405 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1409 if(ret==WAIT_FAILED) {
1410 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1412 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1413 /* Do we want to try again if we get
1414 * WAIT_IO_COMPLETION? The documentation for
1415 * WaitHandle doesn't give any clues. (We'd have to
1416 * fiddle with the timeout if we retry.)
1418 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1425 /* FIXME: exitContext isnt documented */
1426 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1432 MonoObject *waitHandle;
1433 MonoThread *thread = mono_thread_current ();
1435 MONO_ARCH_SAVE_REGS;
1437 /* Do this WaitSleepJoin check before creating objects */
1438 mono_thread_current_check_pending_interrupt ();
1440 numhandles = mono_array_length(mono_handles);
1441 handles = g_new0(HANDLE, numhandles);
1443 for(i = 0; i < numhandles; i++) {
1444 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1445 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1452 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1454 ret=WaitForMultipleObjectsEx(numhandles, handles, FALSE, ms, TRUE);
1456 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1460 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1463 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1465 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1466 return ret - WAIT_OBJECT_0;
1468 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1469 return ret - WAIT_ABANDONED_0;
1476 /* FIXME: exitContext isnt documented */
1477 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1480 MonoThread *thread = mono_thread_current ();
1482 MONO_ARCH_SAVE_REGS;
1484 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1490 mono_thread_current_check_pending_interrupt ();
1492 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1494 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1496 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1498 if(ret==WAIT_FAILED) {
1499 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1501 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1502 /* Do we want to try again if we get
1503 * WAIT_IO_COMPLETION? The documentation for
1504 * WaitHandle doesn't give any clues. (We'd have to
1505 * fiddle with the timeout if we retry.)
1507 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1515 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1518 MonoThread *thread = mono_thread_current ();
1520 MONO_ARCH_SAVE_REGS;
1525 mono_thread_current_check_pending_interrupt ();
1527 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1529 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1531 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1533 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1536 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1540 MONO_ARCH_SAVE_REGS;
1545 mutex = CreateMutex (NULL, owned, NULL);
1547 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1549 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1557 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1558 MONO_ARCH_SAVE_REGS;
1560 return(ReleaseMutex (handle));
1563 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1569 MONO_ARCH_SAVE_REGS;
1571 *error = ERROR_SUCCESS;
1573 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1575 *error = GetLastError ();
1582 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1586 MONO_ARCH_SAVE_REGS;
1591 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1593 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1594 mono_string_chars (name));
1596 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1604 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1608 MONO_ARCH_SAVE_REGS;
1610 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1615 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1619 MONO_ARCH_SAVE_REGS;
1621 *error = ERROR_SUCCESS;
1623 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1625 *error = GetLastError ();
1631 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1635 MONO_ARCH_SAVE_REGS;
1640 event = CreateEvent (NULL, manual, initial, NULL);
1642 event = CreateEvent (NULL, manual, initial,
1643 mono_string_chars (name));
1645 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1653 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1654 MONO_ARCH_SAVE_REGS;
1656 return (SetEvent(handle));
1659 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1660 MONO_ARCH_SAVE_REGS;
1662 return (ResetEvent(handle));
1666 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1667 MONO_ARCH_SAVE_REGS;
1669 CloseHandle (handle);
1672 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1678 MONO_ARCH_SAVE_REGS;
1680 *error = ERROR_SUCCESS;
1682 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1684 *error = GetLastError ();
1690 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1692 MONO_ARCH_SAVE_REGS;
1694 return InterlockedIncrement (location);
1697 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1701 MONO_ARCH_SAVE_REGS;
1703 mono_interlocked_lock ();
1707 mono_interlocked_unlock ();
1713 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1715 MONO_ARCH_SAVE_REGS;
1717 return InterlockedDecrement(location);
1720 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1724 MONO_ARCH_SAVE_REGS;
1726 mono_interlocked_lock ();
1730 mono_interlocked_unlock ();
1735 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1737 MONO_ARCH_SAVE_REGS;
1739 return InterlockedExchange(location, value);
1742 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1744 MONO_ARCH_SAVE_REGS;
1746 return (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1749 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1751 IntFloatUnion val, ret;
1753 MONO_ARCH_SAVE_REGS;
1756 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1762 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1764 #if SIZEOF_VOID_P == 8
1765 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1770 * According to MSDN, this function is only atomic with regards to the
1771 * other Interlocked functions on 32 bit platforms.
1773 mono_interlocked_lock ();
1776 mono_interlocked_unlock ();
1783 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1785 #if SIZEOF_VOID_P == 8
1786 LongDoubleUnion val, ret;
1789 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1796 * According to MSDN, this function is only atomic with regards to the
1797 * other Interlocked functions on 32 bit platforms.
1799 mono_interlocked_lock ();
1802 mono_interlocked_unlock ();
1808 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1810 MONO_ARCH_SAVE_REGS;
1812 return InterlockedCompareExchange(location, value, comparand);
1815 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1817 MONO_ARCH_SAVE_REGS;
1819 return (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1822 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1824 IntFloatUnion val, ret, cmp;
1826 MONO_ARCH_SAVE_REGS;
1829 cmp.fval = comparand;
1830 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1836 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1838 #if SIZEOF_VOID_P == 8
1839 LongDoubleUnion val, comp, ret;
1842 comp.fval = comparand;
1843 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1849 mono_interlocked_lock ();
1851 if (old == comparand)
1853 mono_interlocked_unlock ();
1860 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1862 #if SIZEOF_VOID_P == 8
1863 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1867 mono_interlocked_lock ();
1869 if (old == comparand)
1871 mono_interlocked_unlock ();
1878 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1880 MONO_ARCH_SAVE_REGS;
1882 return InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1886 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1888 MONO_ARCH_SAVE_REGS;
1890 return InterlockedExchangePointer ((gpointer *)location, value);
1894 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1896 #if SIZEOF_VOID_P == 8
1897 /* Should be implemented as a JIT intrinsic */
1898 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1903 mono_interlocked_lock ();
1905 *location = orig + value;
1906 mono_interlocked_unlock ();
1908 return orig + value;
1913 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1915 #if SIZEOF_VOID_P == 8
1916 /* Should be implemented as a JIT intrinsic */
1917 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1922 mono_interlocked_lock ();
1924 *location = orig + value;
1925 mono_interlocked_unlock ();
1927 return orig + value;
1932 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1934 #if SIZEOF_VOID_P == 8
1935 /* 64 bit reads are already atomic */
1940 mono_interlocked_lock ();
1942 mono_interlocked_unlock ();
1949 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1951 mono_threads_lock ();
1952 mono_threads_unlock ();
1956 ves_icall_System_Threading_Thread_ClrState (MonoThread* this, guint32 state)
1958 mono_thread_clr_state (this, state);
1960 if (state & ThreadState_Background) {
1961 /* If the thread changes the background mode, the main thread has to
1962 * be notified, since it has to rebuild the list of threads to
1965 SetEvent (background_change_event);
1970 ves_icall_System_Threading_Thread_SetState (MonoThread* this, guint32 state)
1972 mono_thread_set_state (this, state);
1974 if (state & ThreadState_Background) {
1975 /* If the thread changes the background mode, the main thread has to
1976 * be notified, since it has to rebuild the list of threads to
1979 SetEvent (background_change_event);
1984 ves_icall_System_Threading_Thread_GetState (MonoThread* this)
1988 ensure_synch_cs_set (this);
1990 EnterCriticalSection (this->synch_cs);
1992 state = this->state;
1994 LeaveCriticalSection (this->synch_cs);
1999 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this)
2001 gboolean throw = FALSE;
2003 ensure_synch_cs_set (this);
2005 if (this == mono_thread_current ())
2008 EnterCriticalSection (this->synch_cs);
2010 this->thread_interrupt_requested = TRUE;
2012 if (this->state & ThreadState_WaitSleepJoin) {
2016 LeaveCriticalSection (this->synch_cs);
2019 signal_thread_state_change (this);
2023 void mono_thread_current_check_pending_interrupt ()
2025 MonoThread *thread = mono_thread_current ();
2026 gboolean throw = FALSE;
2028 mono_debugger_check_interruption ();
2030 ensure_synch_cs_set (thread);
2032 EnterCriticalSection (thread->synch_cs);
2034 if (thread->thread_interrupt_requested) {
2036 thread->thread_interrupt_requested = FALSE;
2039 LeaveCriticalSection (thread->synch_cs);
2042 mono_raise_exception (mono_get_exception_thread_interrupted ());
2047 mono_thread_get_abort_signal (void)
2049 #ifdef PLATFORM_WIN32
2059 static int abort_signum = -1;
2061 if (abort_signum != -1)
2062 return abort_signum;
2063 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2064 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2065 struct sigaction sinfo;
2066 sigaction (i, NULL, &sinfo);
2067 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2072 /* fallback to the old way */
2075 #endif /* PLATFORM_WIN32 */
2078 #ifdef PLATFORM_WIN32
2079 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2081 MonoException* exc = mono_thread_request_interruption (FALSE);
2082 if (exc) mono_raise_exception (exc);
2084 #endif /* PLATFORM_WIN32 */
2087 * signal_thread_state_change
2089 * Tells the thread that his state has changed and it has to enter the new
2090 * state as soon as possible.
2092 static void signal_thread_state_change (MonoThread *thread)
2094 if (thread == mono_thread_current ()) {
2095 /* Do it synchronously */
2096 MonoException *exc = mono_thread_request_interruption (FALSE);
2098 mono_raise_exception (exc);
2101 #ifdef PLATFORM_WIN32
2102 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2104 /* fixme: store the state somewhere */
2105 #ifdef PTHREAD_POINTER_ID
2106 pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
2108 pthread_kill (thread->tid, mono_thread_get_abort_signal ());
2112 * This will cause waits to be broken.
2113 * It will also prevent the thread from entering a wait, so if the thread returns
2114 * from the wait before it receives the abort signal, it will just spin in the wait
2115 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2118 wapi_interrupt_thread (thread->handle);
2119 #endif /* PLATFORM_WIN32 */
2123 ves_icall_System_Threading_Thread_Abort (MonoThread *thread, MonoObject *state)
2125 MONO_ARCH_SAVE_REGS;
2127 ensure_synch_cs_set (thread);
2129 EnterCriticalSection (thread->synch_cs);
2131 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2132 (thread->state & ThreadState_StopRequested) != 0 ||
2133 (thread->state & ThreadState_Stopped) != 0)
2135 LeaveCriticalSection (thread->synch_cs);
2139 if ((thread->state & ThreadState_Unstarted) != 0) {
2140 thread->state |= ThreadState_Aborted;
2141 LeaveCriticalSection (thread->synch_cs);
2145 thread->state |= ThreadState_AbortRequested;
2146 if (thread->abort_state_handle)
2147 mono_gchandle_free (thread->abort_state_handle);
2149 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2150 g_assert (thread->abort_state_handle);
2152 thread->abort_state_handle = 0;
2154 thread->abort_exc = NULL;
2156 LeaveCriticalSection (thread->synch_cs);
2158 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2160 /* During shutdown, we can't wait for other threads */
2162 /* Make sure the thread is awake */
2163 mono_thread_resume (thread);
2165 signal_thread_state_change (thread);
2169 ves_icall_System_Threading_Thread_ResetAbort (void)
2171 MonoThread *thread = mono_thread_current ();
2173 MONO_ARCH_SAVE_REGS;
2175 ensure_synch_cs_set (thread);
2177 EnterCriticalSection (thread->synch_cs);
2179 thread->state &= ~ThreadState_AbortRequested;
2181 if (!thread->abort_exc) {
2182 const char *msg = "Unable to reset abort because no abort was requested";
2183 LeaveCriticalSection (thread->synch_cs);
2184 mono_raise_exception (mono_get_exception_thread_state (msg));
2186 thread->abort_exc = NULL;
2187 if (thread->abort_state_handle) {
2188 mono_gchandle_free (thread->abort_state_handle);
2189 /* This is actually not necessary - the handle
2190 only counts if the exception is set */
2191 thread->abort_state_handle = 0;
2195 LeaveCriticalSection (thread->synch_cs);
2199 serialize_object (MonoObject *obj, gboolean *failure, MonoObject **exc)
2201 static MonoMethod *serialize_method;
2206 if (!serialize_method) {
2207 MonoClass *klass = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting", "RemotingServices");
2208 serialize_method = mono_class_get_method_from_name (klass, "SerializeCallData", -1);
2211 if (!serialize_method) {
2216 g_assert (!obj->vtable->klass->marshalbyref);
2220 array = mono_runtime_invoke (serialize_method, NULL, params, exc);
2228 deserialize_object (MonoObject *obj, gboolean *failure, MonoObject **exc)
2230 static MonoMethod *deserialize_method;
2235 if (!deserialize_method) {
2236 MonoClass *klass = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting", "RemotingServices");
2237 deserialize_method = mono_class_get_method_from_name (klass, "DeserializeCallData", -1);
2239 if (!deserialize_method) {
2246 result = mono_runtime_invoke (deserialize_method, NULL, params, exc);
2254 make_transparent_proxy (MonoObject *obj, gboolean *failure, MonoObject **exc)
2256 static MonoMethod *get_proxy_method;
2258 MonoDomain *domain = mono_domain_get ();
2259 MonoRealProxy *real_proxy;
2260 MonoReflectionType *reflection_type;
2261 MonoTransparentProxy *transparent_proxy;
2263 if (!get_proxy_method)
2264 get_proxy_method = mono_class_get_method_from_name (mono_defaults.real_proxy_class, "GetTransparentProxy", 0);
2266 g_assert (obj->vtable->klass->marshalbyref);
2268 real_proxy = (MonoRealProxy*) mono_object_new (domain, mono_defaults.real_proxy_class);
2269 reflection_type = mono_type_get_object (domain, &obj->vtable->klass->byval_arg);
2271 real_proxy->class_to_proxy = reflection_type;
2272 real_proxy->unwrapped_server = obj;
2275 transparent_proxy = (MonoTransparentProxy*) mono_runtime_invoke (get_proxy_method, real_proxy, NULL, exc);
2279 return (MonoObject*) transparent_proxy;
2283 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *thread)
2285 MonoObject *state, *serialized, *deserialized = NULL, *exc;
2287 gboolean failure = FALSE;
2289 if (!thread->abort_state_handle)
2292 state = mono_gchandle_get_target (thread->abort_state_handle);
2295 domain = mono_domain_get ();
2296 if (state->vtable->domain == domain)
2299 if (state->vtable->klass->marshalbyref) {
2300 deserialized = make_transparent_proxy (state, &failure, &exc);
2302 mono_domain_set_internal_with_options (state->vtable->domain, FALSE);
2303 serialized = serialize_object (state, &failure, &exc);
2304 mono_domain_set_internal_with_options (domain, FALSE);
2306 deserialized = deserialize_object (serialized, &failure, &exc);
2310 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2312 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2313 mono_raise_exception (invalid_op_exc);
2316 return deserialized;
2320 mono_thread_suspend (MonoThread *thread)
2322 MONO_ARCH_SAVE_REGS;
2324 ensure_synch_cs_set (thread);
2326 EnterCriticalSection (thread->synch_cs);
2328 if ((thread->state & ThreadState_Unstarted) != 0 ||
2329 (thread->state & ThreadState_Aborted) != 0 ||
2330 (thread->state & ThreadState_Stopped) != 0)
2332 LeaveCriticalSection (thread->synch_cs);
2336 if ((thread->state & ThreadState_Suspended) != 0 ||
2337 (thread->state & ThreadState_SuspendRequested) != 0 ||
2338 (thread->state & ThreadState_StopRequested) != 0)
2340 LeaveCriticalSection (thread->synch_cs);
2344 thread->state |= ThreadState_SuspendRequested;
2346 LeaveCriticalSection (thread->synch_cs);
2348 signal_thread_state_change (thread);
2353 ves_icall_System_Threading_Thread_Suspend (MonoThread *thread)
2355 if (!mono_thread_suspend (thread))
2356 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2360 mono_thread_resume (MonoThread *thread)
2362 MONO_ARCH_SAVE_REGS;
2364 ensure_synch_cs_set (thread);
2366 EnterCriticalSection (thread->synch_cs);
2368 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2369 thread->state &= ~ThreadState_SuspendRequested;
2370 LeaveCriticalSection (thread->synch_cs);
2374 if ((thread->state & ThreadState_Suspended) == 0 ||
2375 (thread->state & ThreadState_Unstarted) != 0 ||
2376 (thread->state & ThreadState_Aborted) != 0 ||
2377 (thread->state & ThreadState_Stopped) != 0)
2379 LeaveCriticalSection (thread->synch_cs);
2383 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2384 if (thread->resume_event == NULL) {
2385 LeaveCriticalSection (thread->synch_cs);
2389 /* Awake the thread */
2390 SetEvent (thread->suspend_event);
2392 LeaveCriticalSection (thread->synch_cs);
2394 /* Wait for the thread to awake */
2395 WaitForSingleObject (thread->resume_event, INFINITE);
2396 CloseHandle (thread->resume_event);
2397 thread->resume_event = NULL;
2403 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2405 if (!mono_thread_resume (thread))
2406 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2410 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2415 if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
2416 m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
2417 m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
2419 *((gboolean*)data) = TRUE;
2426 is_running_protected_wrapper (void)
2428 gboolean found = FALSE;
2429 mono_stack_walk (find_wrapper, &found);
2433 void mono_thread_stop (MonoThread *thread)
2435 ensure_synch_cs_set (thread);
2437 EnterCriticalSection (thread->synch_cs);
2439 if ((thread->state & ThreadState_StopRequested) != 0 ||
2440 (thread->state & ThreadState_Stopped) != 0)
2442 LeaveCriticalSection (thread->synch_cs);
2446 /* Make sure the thread is awake */
2447 mono_thread_resume (thread);
2449 thread->state |= ThreadState_StopRequested;
2450 thread->state &= ~ThreadState_AbortRequested;
2452 LeaveCriticalSection (thread->synch_cs);
2454 signal_thread_state_change (thread);
2458 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2460 return *((volatile gint8 *) (ptr));
2464 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2466 return *((volatile gint16 *) (ptr));
2470 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2472 return *((volatile gint32 *) (ptr));
2476 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2478 return *((volatile gint64 *) (ptr));
2482 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2484 return (void *) *((volatile void **) ptr);
2488 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2490 *((volatile gint8 *) ptr) = value;
2494 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2496 *((volatile gint16 *) ptr) = value;
2500 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2502 *((volatile gint32 *) ptr) = value;
2506 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2508 *((volatile gint64 *) ptr) = value;
2512 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2514 *((volatile void **) ptr) = value;
2517 void mono_thread_init (MonoThreadStartCB start_cb,
2518 MonoThreadAttachCB attach_cb)
2520 MONO_GC_REGISTER_ROOT (small_id_table);
2521 InitializeCriticalSection(&threads_mutex);
2522 InitializeCriticalSection(&interlocked_mutex);
2523 InitializeCriticalSection(&contexts_mutex);
2524 InitializeCriticalSection(&delayed_free_table_mutex);
2525 InitializeCriticalSection(&small_id_mutex);
2527 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2528 g_assert(background_change_event != NULL);
2530 mono_init_static_data_info (&thread_static_info);
2531 mono_init_static_data_info (&context_static_info);
2533 current_object_key=TlsAlloc();
2534 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2536 mono_thread_start_cb = start_cb;
2537 mono_thread_attach_cb = attach_cb;
2539 delayed_free_table = g_array_new (FALSE, FALSE, sizeof (DelayedFreeItem));
2541 /* Get a pseudo handle to the current process. This is just a
2542 * kludge so that wapi can build a process handle if needed.
2543 * As a pseudo handle is returned, we don't need to clean
2546 GetCurrentProcess ();
2549 void mono_thread_cleanup (void)
2551 mono_thread_hazardous_try_free_all ();
2553 #if !defined(PLATFORM_WIN32) && !defined(RUN_IN_SUBTHREAD)
2554 /* The main thread must abandon any held mutexes (particularly
2555 * important for named mutexes as they are shared across
2556 * processes, see bug 74680.) This will happen when the
2557 * thread exits, but if it's not running in a subthread it
2558 * won't exit in time.
2560 /* Using non-w32 API is a nasty kludge, but I couldn't find
2561 * anything in the documentation that would let me do this
2562 * here yet still be safe to call on windows.
2564 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2568 /* This stuff needs more testing, it seems one of these
2569 * critical sections can be locked when mono_thread_cleanup is
2572 DeleteCriticalSection (&threads_mutex);
2573 DeleteCriticalSection (&interlocked_mutex);
2574 DeleteCriticalSection (&contexts_mutex);
2575 DeleteCriticalSection (&delayed_free_table_mutex);
2576 DeleteCriticalSection (&small_id_mutex);
2577 CloseHandle (background_change_event);
2580 g_array_free (delayed_free_table, TRUE);
2581 delayed_free_table = NULL;
2583 TlsFree (current_object_key);
2587 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2589 mono_thread_cleanup_fn = func;
2593 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2595 thread->manage_callback = func;
2598 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2600 mono_thread_notify_pending_exc_fn = func;
2604 static void print_tids (gpointer key, gpointer value, gpointer user)
2606 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2607 * sizeof(uint) and a cast to uint would overflow
2609 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2610 * print this as a pointer.
2612 g_message ("Waiting for: %p", key);
2617 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2618 MonoThread *threads[MAXIMUM_WAIT_OBJECTS];
2622 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2626 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2628 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, FALSE);
2630 if(ret==WAIT_FAILED) {
2631 /* See the comment in build_wait_tids() */
2632 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2636 for(i=0; i<wait->num; i++)
2637 CloseHandle (wait->handles[i]);
2639 if (ret == WAIT_TIMEOUT)
2642 for(i=0; i<wait->num; i++) {
2643 gsize tid = wait->threads[i]->tid;
2645 mono_threads_lock ();
2646 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2647 /* This thread must have been killed, because
2648 * it hasn't cleaned itself up. (It's just
2649 * possible that the thread exited before the
2650 * parent thread had a chance to store the
2651 * handle, and now there is another pointer to
2652 * the already-exited thread stored. In this
2653 * case, we'll just get two
2654 * mono_profiler_thread_end() calls for the
2658 mono_threads_unlock ();
2659 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2660 thread_cleanup (wait->threads[i]);
2662 mono_threads_unlock ();
2667 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2669 guint32 i, ret, count;
2671 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2673 /* Add the thread state change event, so it wakes up if a thread changes
2674 * to background mode.
2677 if (count < MAXIMUM_WAIT_OBJECTS) {
2678 wait->handles [count] = background_change_event;
2682 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, FALSE);
2684 if(ret==WAIT_FAILED) {
2685 /* See the comment in build_wait_tids() */
2686 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2690 for(i=0; i<wait->num; i++)
2691 CloseHandle (wait->handles[i]);
2693 if (ret == WAIT_TIMEOUT)
2696 if (ret < wait->num) {
2697 gsize tid = wait->threads[ret]->tid;
2698 mono_threads_lock ();
2699 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2700 /* See comment in wait_for_tids about thread cleanup */
2701 mono_threads_unlock ();
2702 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2703 thread_cleanup (wait->threads [ret]);
2705 mono_threads_unlock ();
2709 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2711 struct wait_data *wait=(struct wait_data *)user;
2713 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2715 MonoThread *thread=(MonoThread *)value;
2717 /* Ignore background threads, we abort them later */
2718 /* Do not lock here since it is not needed and the caller holds threads_lock */
2719 if (thread->state & ThreadState_Background) {
2720 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2721 return; /* just leave, ignore */
2724 if (mono_gc_is_finalizer_thread (thread)) {
2725 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2729 if (thread == mono_thread_current ()) {
2730 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2734 if (thread == mono_thread_get_main ()) {
2735 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2739 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2740 if (handle == NULL) {
2741 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2745 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2746 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread) == TRUE)) {
2747 wait->handles[wait->num]=handle;
2748 wait->threads[wait->num]=thread;
2751 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2753 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2758 /* Just ignore the rest, we can't do anything with
2765 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2767 struct wait_data *wait=(struct wait_data *)user;
2768 gsize self = GetCurrentThreadId ();
2769 MonoThread *thread = (MonoThread *) value;
2772 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2775 /* The finalizer thread is not a background thread */
2776 if (thread->tid != self && (thread->state & ThreadState_Background) != 0) {
2778 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2782 /* printf ("A: %d\n", wait->num); */
2783 wait->handles[wait->num]=thread->handle;
2784 wait->threads[wait->num]=thread;
2787 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2788 mono_thread_stop (thread);
2792 return (thread->tid != self && !mono_gc_is_finalizer_thread (thread));
2796 * mono_threads_set_shutting_down:
2798 * Is called by a thread that wants to shut down Mono. If the runtime is already
2799 * shutting down, the calling thread is suspended/stopped, and this function never
2803 mono_threads_set_shutting_down (void)
2805 MonoThread *current_thread = mono_thread_current ();
2807 mono_threads_lock ();
2809 if (shutting_down) {
2810 mono_threads_unlock ();
2812 /* Make sure we're properly suspended/stopped */
2814 EnterCriticalSection (current_thread->synch_cs);
2816 if ((current_thread->state & ThreadState_SuspendRequested) ||
2817 (current_thread->state & ThreadState_AbortRequested) ||
2818 (current_thread->state & ThreadState_StopRequested)) {
2819 LeaveCriticalSection (current_thread->synch_cs);
2820 mono_thread_execute_interruption (current_thread);
2822 current_thread->state |= ThreadState_Stopped;
2823 LeaveCriticalSection (current_thread->synch_cs);
2826 /* Wake up other threads potentially waiting for us */
2829 shutting_down = TRUE;
2831 /* Not really a background state change, but this will
2832 * interrupt the main thread if it is waiting for all
2833 * the other threads.
2835 SetEvent (background_change_event);
2837 mono_threads_unlock ();
2842 * mono_threads_is_shutting_down:
2844 * Returns whether a thread has commenced shutdown of Mono. Note that
2845 * if the function returns FALSE the caller must not assume that
2846 * shutdown is not in progress, because the situation might have
2847 * changed since the function returned. For that reason this function
2848 * is of very limited utility.
2851 mono_threads_is_shutting_down (void)
2853 return shutting_down;
2856 void mono_thread_manage (void)
2858 struct wait_data *wait=g_new0 (struct wait_data, 1);
2860 /* join each thread that's still running */
2861 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2863 mono_threads_lock ();
2865 THREAD_DEBUG (g_message("%s: No threads", __func__));
2866 mono_threads_unlock ();
2869 mono_threads_unlock ();
2872 mono_threads_lock ();
2873 if (shutting_down) {
2874 /* somebody else is shutting down */
2875 mono_threads_unlock ();
2878 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2879 mono_g_hash_table_foreach (threads, print_tids, NULL));
2881 ResetEvent (background_change_event);
2883 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2884 mono_threads_unlock ();
2886 /* Something to wait for */
2887 wait_for_tids_or_state_change (wait, INFINITE);
2889 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2890 } while(wait->num>0);
2892 mono_threads_set_shutting_down ();
2894 /* No new threads will be created after this point */
2896 mono_runtime_set_shutting_down ();
2898 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2899 mono_thread_pool_cleanup ();
2902 * Remove everything but the finalizer thread and self.
2903 * Also abort all the background threads
2906 mono_threads_lock ();
2909 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2911 mono_threads_unlock ();
2913 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2915 /* Something to wait for */
2916 wait_for_tids (wait, INFINITE);
2918 } while (wait->num > 0);
2921 * give the subthreads a chance to really quit (this is mainly needed
2922 * to get correct user and system times from getrusage/wait/time(1)).
2923 * This could be removed if we avoid pthread_detach() and use pthread_join().
2925 #ifndef PLATFORM_WIN32
2932 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2934 MonoThread *thread=(MonoThread *)value;
2936 if(thread->tid != (gsize)user) {
2937 /*TerminateThread (thread->handle, -1);*/
2941 void mono_thread_abort_all_other_threads (void)
2943 gsize self = GetCurrentThreadId ();
2945 mono_threads_lock ();
2946 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2947 mono_g_hash_table_size (threads));
2948 mono_g_hash_table_foreach (threads, print_tids, NULL));
2950 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2952 mono_threads_unlock ();
2956 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2958 MonoThread *thread = (MonoThread*)value;
2959 struct wait_data *wait = (struct wait_data*)user_data;
2963 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2965 * This needs no locking.
2967 if ((thread->state & ThreadState_Suspended) != 0 ||
2968 (thread->state & ThreadState_Stopped) != 0)
2971 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2972 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2976 wait->handles [wait->num] = handle;
2977 wait->threads [wait->num] = thread;
2983 * mono_thread_suspend_all_other_threads:
2985 * Suspend all managed threads except the finalizer thread and this thread. It is
2986 * not possible to resume them later.
2988 void mono_thread_suspend_all_other_threads (void)
2990 struct wait_data *wait = g_new0 (struct wait_data, 1);
2992 gsize self = GetCurrentThreadId ();
2994 guint32 eventidx = 0;
2995 gboolean starting, finished;
2998 * The other threads could be in an arbitrary state at this point, i.e.
2999 * they could be starting up, shutting down etc. This means that there could be
3000 * threads which are not even in the threads hash table yet.
3004 * First we set a barrier which will be checked by all threads before they
3005 * are added to the threads hash table, and they will exit if the flag is set.
3006 * This ensures that no threads could be added to the hash later.
3007 * We will use shutting_down as the barrier for now.
3009 g_assert (shutting_down);
3012 * We make multiple calls to WaitForMultipleObjects since:
3013 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3014 * - some threads could exit without becoming suspended
3019 * Make a copy of the hashtable since we can't do anything with
3020 * threads while threads_mutex is held.
3023 mono_threads_lock ();
3024 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3025 mono_threads_unlock ();
3027 events = g_new0 (gpointer, wait->num);
3029 /* Get the suspended events that we'll be waiting for */
3030 for (i = 0; i < wait->num; ++i) {
3031 MonoThread *thread = wait->threads [i];
3032 gboolean signal_suspend = FALSE;
3034 if ((thread->tid == self) || mono_gc_is_finalizer_thread (thread)) {
3035 //CloseHandle (wait->handles [i]);
3036 wait->threads [i] = NULL; /* ignore this thread in next loop */
3040 ensure_synch_cs_set (thread);
3042 EnterCriticalSection (thread->synch_cs);
3044 if (thread->suspended_event == NULL) {
3045 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3046 if (thread->suspended_event == NULL) {
3047 /* Forget this one and go on to the next */
3048 LeaveCriticalSection (thread->synch_cs);
3053 if ((thread->state & ThreadState_Suspended) != 0 ||
3054 (thread->state & ThreadState_StopRequested) != 0 ||
3055 (thread->state & ThreadState_Stopped) != 0) {
3056 LeaveCriticalSection (thread->synch_cs);
3057 CloseHandle (wait->handles [i]);
3058 wait->threads [i] = NULL; /* ignore this thread in next loop */
3062 if ((thread->state & ThreadState_SuspendRequested) == 0)
3063 signal_suspend = TRUE;
3065 events [eventidx++] = thread->suspended_event;
3067 /* Convert abort requests into suspend requests */
3068 if ((thread->state & ThreadState_AbortRequested) != 0)
3069 thread->state &= ~ThreadState_AbortRequested;
3071 thread->state |= ThreadState_SuspendRequested;
3073 LeaveCriticalSection (thread->synch_cs);
3075 /* Signal the thread to suspend */
3077 signal_thread_state_change (thread);
3081 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3082 for (i = 0; i < wait->num; ++i) {
3083 MonoThread *thread = wait->threads [i];
3088 EnterCriticalSection (thread->synch_cs);
3089 if ((thread->state & ThreadState_Suspended) != 0) {
3090 CloseHandle (thread->suspended_event);
3091 thread->suspended_event = NULL;
3093 LeaveCriticalSection (thread->synch_cs);
3097 * If there are threads which are starting up, we wait until they
3098 * are suspended when they try to register in the threads hash.
3099 * This is guaranteed to finish, since the threads which can create new
3100 * threads get suspended after a while.
3101 * FIXME: The finalizer thread can still create new threads.
3103 mono_threads_lock ();
3104 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3105 mono_threads_unlock ();
3119 collect_threads (gpointer key, gpointer value, gpointer user_data)
3121 MonoThread *thread = (MonoThread*)value;
3122 struct wait_data *wait = (struct wait_data*)user_data;
3125 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3126 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3130 wait->handles [wait->num] = handle;
3131 wait->threads [wait->num] = thread;
3137 * mono_threads_request_thread_dump:
3139 * Ask all threads except the current to print their stacktrace to stdout.
3142 mono_threads_request_thread_dump (void)
3144 struct wait_data *wait = g_new0 (struct wait_data, 1);
3148 * Make a copy of the hashtable since we can't do anything with
3149 * threads while threads_mutex is held.
3151 mono_threads_lock ();
3152 mono_g_hash_table_foreach (threads, collect_threads, wait);
3153 mono_threads_unlock ();
3155 for (i = 0; i < wait->num; ++i) {
3156 MonoThread *thread = wait->threads [i];
3158 if (!mono_gc_is_finalizer_thread (thread) && (thread != mono_thread_current ()) && !thread->thread_dump_requested) {
3159 thread->thread_dump_requested = TRUE;
3161 signal_thread_state_change (thread);
3164 CloseHandle (wait->handles [i]);
3169 * mono_thread_push_appdomain_ref:
3171 * Register that the current thread may have references to objects in domain
3172 * @domain on its stack. Each call to this function should be paired with a
3173 * call to pop_appdomain_ref.
3176 mono_thread_push_appdomain_ref (MonoDomain *domain)
3178 MonoThread *thread = mono_thread_current ();
3181 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3182 mono_threads_lock ();
3183 thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
3184 mono_threads_unlock ();
3189 mono_thread_pop_appdomain_ref (void)
3191 MonoThread *thread = mono_thread_current ();
3194 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3195 mono_threads_lock ();
3196 /* FIXME: How can the list be empty ? */
3197 if (thread->appdomain_refs)
3198 thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
3199 mono_threads_unlock ();
3204 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3207 mono_threads_lock ();
3208 res = g_slist_find (thread->appdomain_refs, domain) != NULL;
3209 mono_threads_unlock ();
3213 typedef struct abort_appdomain_data {
3214 struct wait_data wait;
3216 } abort_appdomain_data;
3219 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3221 MonoThread *thread = (MonoThread*)value;
3222 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3223 MonoDomain *domain = data->domain;
3225 if (mono_thread_has_appdomain_ref (thread, domain)) {
3226 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3228 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3229 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3232 data->wait.handles [data->wait.num] = handle;
3233 data->wait.threads [data->wait.num] = thread;
3236 /* Just ignore the rest, we can't do anything with
3244 * mono_threads_abort_appdomain_threads:
3246 * Abort threads which has references to the given appdomain.
3249 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3251 abort_appdomain_data user_data;
3253 int orig_timeout = timeout;
3256 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3258 start_time = mono_msec_ticks ();
3260 mono_threads_lock ();
3262 user_data.domain = domain;
3263 user_data.wait.num = 0;
3264 /* This shouldn't take any locks */
3265 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3266 mono_threads_unlock ();
3268 if (user_data.wait.num > 0) {
3269 /* Abort the threads outside the threads lock */
3270 for (i = 0; i < user_data.wait.num; ++i)
3271 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3274 * We should wait for the threads either to abort, or to leave the
3275 * domain. We can't do the latter, so we wait with a timeout.
3277 wait_for_tids (&user_data.wait, 100);
3280 /* Update remaining time */
3281 timeout -= mono_msec_ticks () - start_time;
3282 start_time = mono_msec_ticks ();
3284 if (orig_timeout != -1 && timeout < 0)
3287 while (user_data.wait.num > 0);
3289 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3295 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3297 MonoThread *thread = (MonoThread*)value;
3298 MonoDomain *domain = (MonoDomain*)user_data;
3301 /* No locking needed here */
3302 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3304 if (thread->cached_culture_info) {
3305 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3306 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3307 if (obj && obj->vtable->domain == domain)
3308 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3314 * mono_threads_clear_cached_culture:
3316 * Clear the cached_current_culture from all threads if it is in the
3320 mono_threads_clear_cached_culture (MonoDomain *domain)
3322 mono_threads_lock ();
3323 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3324 mono_threads_unlock ();
3328 * mono_thread_get_undeniable_exception:
3330 * Return an exception which needs to be raised when leaving a catch clause.
3331 * This is used for undeniable exception propagation.
3334 mono_thread_get_undeniable_exception (void)
3336 MonoThread *thread = mono_thread_current ();
3338 MONO_ARCH_SAVE_REGS;
3340 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3342 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3343 * exception if the thread no longer references a dying appdomain.
3345 thread->abort_exc->trace_ips = NULL;
3346 thread->abort_exc->stack_trace = NULL;
3347 return thread->abort_exc;
3353 #define NUM_STATIC_DATA_IDX 8
3354 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3355 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3360 * mono_alloc_static_data
3362 * Allocate memory blocks for storing threads or context static data
3365 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset)
3367 guint idx = (offset >> 24) - 1;
3370 gpointer* static_data = *static_data_ptr;
3372 static_data = mono_gc_alloc_fixed (static_data_size [0], NULL);
3373 *static_data_ptr = static_data;
3374 static_data [0] = static_data;
3377 for (i = 1; i <= idx; ++i) {
3378 if (static_data [i])
3380 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3385 * mono_init_static_data_info
3387 * Initializes static data counters
3389 static void mono_init_static_data_info (StaticDataInfo *static_data)
3391 static_data->idx = 0;
3392 static_data->offset = 0;
3393 static_data->freelist = NULL;
3397 * mono_alloc_static_data_slot
3399 * Generates an offset for static data. static_data contains the counters
3400 * used to generate it.
3403 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3407 if (!static_data->idx && !static_data->offset) {
3409 * we use the first chunk of the first allocation also as
3410 * an array for the rest of the data
3412 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3414 static_data->offset += align - 1;
3415 static_data->offset &= ~(align - 1);
3416 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3417 static_data->idx ++;
3418 g_assert (size <= static_data_size [static_data->idx]);
3419 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3420 static_data->offset = 0;
3422 offset = static_data->offset | ((static_data->idx + 1) << 24);
3423 static_data->offset += size;
3428 * ensure thread static fields already allocated are valid for thread
3429 * This function is called when a thread is created or on thread attach.
3432 thread_adjust_static_data (MonoThread *thread)
3436 mono_threads_lock ();
3437 if (thread_static_info.offset || thread_static_info.idx > 0) {
3438 /* get the current allocated size */
3439 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3440 mono_alloc_static_data (&(thread->static_data), offset);
3442 mono_threads_unlock ();
3446 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3448 MonoThread *thread = value;
3449 guint32 offset = GPOINTER_TO_UINT (user);
3451 mono_alloc_static_data (&(thread->static_data), offset);
3454 static MonoThreadDomainTls*
3455 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3457 MonoThreadDomainTls* prev = NULL;
3458 MonoThreadDomainTls* tmp = static_data->freelist;
3460 if (tmp->size == size) {
3462 prev->next = tmp->next;
3464 static_data->freelist = tmp->next;
3473 * The offset for a special static variable is composed of three parts:
3474 * a bit that indicates the type of static data (0:thread, 1:context),
3475 * an index in the array of chunks of memory for the thread (thread->static_data)
3476 * and an offset in that chunk of mem. This allows allocating less memory in the
3481 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align)
3484 if (static_type == SPECIAL_STATIC_THREAD)
3486 MonoThreadDomainTls *item;
3487 mono_threads_lock ();
3488 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3489 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3491 offset = item->offset;
3494 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3496 /* This can be called during startup */
3497 if (threads != NULL)
3498 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3499 mono_threads_unlock ();
3503 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3504 mono_contexts_lock ();
3505 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3506 mono_contexts_unlock ();
3507 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3513 mono_get_special_static_data (guint32 offset)
3515 /* The high bit means either thread (0) or static (1) data. */
3517 guint32 static_type = (offset & 0x80000000);
3520 offset &= 0x7fffffff;
3521 idx = (offset >> 24) - 1;
3523 if (static_type == 0)
3525 MonoThread *thread = mono_thread_current ();
3526 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3530 /* Allocate static data block under demand, since we don't have a list
3533 MonoAppContext *context = mono_context_get ();
3534 if (!context->static_data || !context->static_data [idx]) {
3535 mono_contexts_lock ();
3536 mono_alloc_static_data (&(context->static_data), offset);
3537 mono_contexts_unlock ();
3539 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3549 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3551 MonoThread *thread = value;
3552 TlsOffsetSize *data = user;
3553 int idx = (data->offset >> 24) - 1;
3556 if (!thread->static_data || !thread->static_data [idx])
3558 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3559 memset (ptr, 0, data->size);
3563 do_free_special (gpointer key, gpointer value, gpointer data)
3565 MonoClassField *field = key;
3566 guint32 offset = GPOINTER_TO_UINT (value);
3567 guint32 static_type = (offset & 0x80000000);
3570 size = mono_type_size (field->type, &align);
3571 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3572 if (static_type == 0) {
3574 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3575 data.offset = offset & 0x7fffffff;
3577 if (threads != NULL)
3578 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3579 item->offset = offset;
3581 item->next = thread_static_info.freelist;
3582 thread_static_info.freelist = item;
3584 /* FIXME: free context static data as well */
3589 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3591 mono_threads_lock ();
3592 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3593 mono_threads_unlock ();
3596 static MonoClassField *local_slots = NULL;
3599 /* local tls data to get locals_slot from a thread */
3602 /* index in the locals_slot array */
3607 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3609 LocalSlotID *sid = user_data;
3610 MonoThread *thread = (MonoThread*)value;
3611 MonoArray *slots_array;
3613 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3614 * it is for the right domain, so we need to check if it is allocated an initialized
3615 * for the current thread.
3617 /*g_print ("handling thread %p\n", thread);*/
3618 if (!thread->static_data || !thread->static_data [sid->idx])
3620 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3621 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3623 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3627 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3635 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3637 g_warning ("local_slots field not found in Thread class");
3641 domain = mono_domain_get ();
3642 mono_domain_lock (domain);
3643 if (domain->special_static_fields)
3644 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3645 mono_domain_unlock (domain);
3648 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3649 sid.offset = GPOINTER_TO_UINT (addr);
3650 sid.offset &= 0x7fffffff;
3651 sid.idx = (sid.offset >> 24) - 1;
3652 mono_threads_lock ();
3653 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3654 mono_threads_unlock ();
3656 /* FIXME: clear the slot for MonoAppContexts, too */
3660 #ifdef PLATFORM_WIN32
3661 static void CALLBACK dummy_apc (ULONG_PTR param)
3665 static guint32 dummy_apc (gpointer param)
3672 * mono_thread_execute_interruption
3674 * Performs the operation that the requested thread state requires (abort,
3677 static MonoException* mono_thread_execute_interruption (MonoThread *thread)
3679 ensure_synch_cs_set (thread);
3681 EnterCriticalSection (thread->synch_cs);
3683 /* MonoThread::interruption_requested can only be changed with atomics */
3684 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
3685 /* this will consume pending APC calls */
3686 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
3687 InterlockedDecrement (&thread_interruption_requested);
3688 #ifndef PLATFORM_WIN32
3689 /* Clear the interrupted flag of the thread so it can wait again */
3690 wapi_clear_interruption ();
3694 if ((thread->state & ThreadState_AbortRequested) != 0) {
3695 if (thread->abort_exc == NULL)
3696 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
3697 LeaveCriticalSection (thread->synch_cs);
3698 return thread->abort_exc;
3700 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
3701 thread->state &= ~ThreadState_SuspendRequested;
3702 thread->state |= ThreadState_Suspended;
3703 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3704 if (thread->suspend_event == NULL) {
3705 LeaveCriticalSection (thread->synch_cs);
3708 if (thread->suspended_event)
3709 SetEvent (thread->suspended_event);
3711 LeaveCriticalSection (thread->synch_cs);
3713 if (shutting_down) {
3714 /* After we left the lock, the runtime might shut down so everything becomes invalid */
3719 WaitForSingleObject (thread->suspend_event, INFINITE);
3721 EnterCriticalSection (thread->synch_cs);
3723 CloseHandle (thread->suspend_event);
3724 thread->suspend_event = NULL;
3725 thread->state &= ~ThreadState_Suspended;
3727 /* The thread that requested the resume will have replaced this event
3728 * and will be waiting for it
3730 SetEvent (thread->resume_event);
3732 LeaveCriticalSection (thread->synch_cs);
3736 else if ((thread->state & ThreadState_StopRequested) != 0) {
3737 /* FIXME: do this through the JIT? */
3739 LeaveCriticalSection (thread->synch_cs);
3741 mono_thread_exit ();
3743 } else if (thread->thread_interrupt_requested) {
3745 thread->thread_interrupt_requested = FALSE;
3746 LeaveCriticalSection (thread->synch_cs);
3748 return(mono_get_exception_thread_interrupted ());
3751 LeaveCriticalSection (thread->synch_cs);
3757 * mono_thread_request_interruption
3759 * A signal handler can call this method to request the interruption of a
3760 * thread. The result of the interruption will depend on the current state of
3761 * the thread. If the result is an exception that needs to be throw, it is
3762 * provided as return value.
3765 mono_thread_request_interruption (gboolean running_managed)
3767 MonoThread *thread = mono_thread_current ();
3769 /* The thread may already be stopping */
3773 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
3776 if (!running_managed || is_running_protected_wrapper ()) {
3777 /* Can't stop while in unmanaged code. Increase the global interruption
3778 request count. When exiting the unmanaged method the count will be
3779 checked and the thread will be interrupted. */
3781 InterlockedIncrement (&thread_interruption_requested);
3783 if (mono_thread_notify_pending_exc_fn && !running_managed)
3784 /* The JIT will notify the thread about the interruption */
3785 /* This shouldn't take any locks */
3786 mono_thread_notify_pending_exc_fn ();
3788 /* this will awake the thread if it is in WaitForSingleObject
3790 /* Our implementation of this function ignores the func argument */
3791 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
3795 return mono_thread_execute_interruption (thread);
3799 gboolean mono_thread_interruption_requested ()
3801 if (thread_interruption_requested) {
3802 MonoThread *thread = mono_thread_current ();
3803 /* The thread may already be stopping */
3805 return (thread->interruption_requested);
3810 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
3812 MonoThread *thread = mono_thread_current ();
3814 /* The thread may already be stopping */
3818 mono_debugger_check_interruption ();
3820 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
3821 MonoException* exc = mono_thread_execute_interruption (thread);
3822 if (exc) mono_raise_exception (exc);
3827 * Performs the interruption of the current thread, if one has been requested,
3828 * and the thread is not running a protected wrapper.
3830 void mono_thread_interruption_checkpoint ()
3832 mono_thread_interruption_checkpoint_request (FALSE);
3836 * Performs the interruption of the current thread, if one has been requested.
3838 void mono_thread_force_interruption_checkpoint ()
3840 mono_thread_interruption_checkpoint_request (TRUE);
3844 * mono_thread_get_and_clear_pending_exception:
3846 * Return any pending exceptions for the current thread and clear it as a side effect.
3849 mono_thread_get_and_clear_pending_exception (void)
3851 MonoThread *thread = mono_thread_current ();
3853 /* The thread may already be stopping */
3857 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
3858 return mono_thread_execute_interruption (thread);
3861 if (thread->pending_exception) {
3862 MonoException *exc = thread->pending_exception;
3864 thread->pending_exception = NULL;
3872 * mono_set_pending_exception:
3874 * Set the pending exception of the current thread to EXC. On platforms which
3875 * support it, the exception will be thrown when execution returns to managed code.
3876 * On other platforms, this function is equivalent to mono_raise_exception ().
3877 * Internal calls which report exceptions using this function instead of
3878 * raise_exception () might be called by JITted code using a more efficient calling
3882 mono_set_pending_exception (MonoException *exc)
3884 MonoThread *thread = mono_thread_current ();
3886 /* The thread may already be stopping */
3890 if (mono_thread_notify_pending_exc_fn) {
3891 MONO_OBJECT_SETREF (thread, pending_exception, exc);
3893 mono_thread_notify_pending_exc_fn ();
3895 /* No way to notify the JIT about the exception, have to throw it now */
3896 mono_raise_exception (exc);
3901 * mono_thread_interruption_request_flag:
3903 * Returns the address of a flag that will be non-zero if an interruption has
3904 * been requested for a thread. The thread to interrupt may not be the current
3905 * thread, so an additional call to mono_thread_interruption_requested() or
3906 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
3909 gint32* mono_thread_interruption_request_flag ()
3911 return &thread_interruption_requested;
3915 mono_thread_init_apartment_state (void)
3918 thread = mono_thread_current ();
3920 #ifdef PLATFORM_WIN32
3921 /* Positive return value indicates success, either
3922 * S_OK if this is first CoInitialize call, or
3923 * S_FALSE if CoInitialize already called, but with same
3924 * threading model. A negative value indicates failure,
3925 * probably due to trying to change the threading model.
3927 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
3928 ? COINIT_APARTMENTTHREADED
3929 : COINIT_MULTITHREADED) < 0) {
3930 thread->apartment_state = ThreadApartmentState_Unknown;
3936 mono_thread_cleanup_apartment_state (void)
3938 #ifdef PLATFORM_WIN32
3940 thread = mono_thread_current ();
3942 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
3949 mono_thread_set_state (MonoThread *thread, MonoThreadState state)
3951 ensure_synch_cs_set (thread);
3953 EnterCriticalSection (thread->synch_cs);
3954 thread->state |= state;
3955 LeaveCriticalSection (thread->synch_cs);
3959 mono_thread_clr_state (MonoThread *thread, MonoThreadState state)
3961 ensure_synch_cs_set (thread);
3963 EnterCriticalSection (thread->synch_cs);
3964 thread->state &= ~state;
3965 LeaveCriticalSection (thread->synch_cs);
3969 mono_thread_test_state (MonoThread *thread, MonoThreadState test)
3971 gboolean ret = FALSE;
3973 ensure_synch_cs_set (thread);
3975 EnterCriticalSection (thread->synch_cs);
3977 if ((thread->state & test) != 0) {
3981 LeaveCriticalSection (thread->synch_cs);
3986 static MonoClassField *execution_context_field;
3989 get_execution_context_addr (void)
3991 MonoDomain *domain = mono_domain_get ();
3994 if (!execution_context_field) {
3995 execution_context_field = mono_class_get_field_from_name (mono_defaults.thread_class,
3997 g_assert (execution_context_field);
4000 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4002 mono_domain_lock (domain);
4003 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, execution_context_field));
4004 mono_domain_unlock (domain);
4007 return (MonoObject**) mono_get_special_static_data (offset);
4011 mono_thread_get_execution_context (void)
4013 return *get_execution_context_addr ();
4017 mono_thread_set_execution_context (MonoObject *ec)
4019 *get_execution_context_addr () = ec;