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 * (C) 2001 Ximian, Inc.
14 #define _WIN32_WINNT 0x0500
21 #include <mono/metadata/object.h>
22 #include <mono/metadata/domain-internals.h>
23 #include <mono/metadata/profiler-private.h>
24 #include <mono/metadata/threads.h>
25 #include <mono/metadata/threadpool.h>
26 #include <mono/metadata/threads-types.h>
27 #include <mono/metadata/exception.h>
28 #include <mono/metadata/environment.h>
29 #include <mono/metadata/monitor.h>
30 #include <mono/metadata/gc-internal.h>
31 #include <mono/metadata/marshal.h>
32 #include <mono/io-layer/io-layer.h>
33 #include <mono/metadata/object-internals.h>
34 #include <mono/metadata/mono-debug-debugger.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
39 #include <mono/os/gc_wrapper.h>
41 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
42 #define THREAD_DEBUG(a)
43 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
44 #define THREAD_WAIT_DEBUG(a)
45 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
46 #define LIBGC_DEBUG(a)
48 /* Provide this for systems with glib < 2.6 */
49 #ifndef G_GSIZE_FORMAT
50 # if GLIB_SIZEOF_LONG == 8
51 # define G_GSIZE_FORMAT "lu"
53 # define G_GSIZE_FORMAT "u"
59 guint32 (*func)(void *);
76 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
77 struct _MonoThreadDomainTls {
78 MonoThreadDomainTls *next;
86 MonoThreadDomainTls *freelist;
91 MonoHazardousFreeFunc free_func;
94 /* Number of cached culture objects in the MonoThread->cached_culture_info array
95 * (per-type): we use the first NUM entries for CultureInfo and the last for
96 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
98 #define NUM_CACHED_CULTURES 4
99 #define CULTURES_START_IDX 0
100 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
102 /* Controls access to the 'threads' hash table */
103 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
104 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
105 static CRITICAL_SECTION threads_mutex;
107 /* Controls access to context static data */
108 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
109 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
110 static CRITICAL_SECTION contexts_mutex;
112 /* Holds current status of static data heap */
113 static StaticDataInfo thread_static_info;
114 static StaticDataInfo context_static_info;
116 /* The hash of existing threads (key is thread ID) that need joining
119 static MonoGHashTable *threads=NULL;
121 /* The TLS key that holds the MonoObject assigned to each thread */
122 static guint32 current_object_key = -1;
124 #ifdef HAVE_KW_THREAD
125 /* we need to use both the Tls* functions and __thread because
126 * the gc needs to see all the threads
128 static __thread MonoThread * tls_current_object MONO_TLS_FAST;
129 #define SET_CURRENT_OBJECT(x) do { \
130 tls_current_object = x; \
131 TlsSetValue (current_object_key, x); \
133 #define GET_CURRENT_OBJECT() tls_current_object
135 #define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x);
136 #define GET_CURRENT_OBJECT() (MonoThread*) TlsGetValue (current_object_key);
139 /* function called at thread start */
140 static MonoThreadStartCB mono_thread_start_cb = NULL;
142 /* function called at thread attach */
143 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
145 /* function called at thread cleanup */
146 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
148 /* The default stack size for each thread */
149 static guint32 default_stacksize = 0;
150 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
152 static void thread_adjust_static_data (MonoThread *thread);
153 static void mono_init_static_data_info (StaticDataInfo *static_data);
154 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
155 static gboolean mono_thread_resume (MonoThread* thread);
156 static void mono_thread_start (MonoThread *thread);
157 static void signal_thread_state_change (MonoThread *thread);
159 /* Spin lock for InterlockedXXX 64 bit functions */
160 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
161 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
162 static CRITICAL_SECTION interlocked_mutex;
164 /* global count of thread interruptions requested */
165 static gint32 thread_interruption_requested = 0;
167 /* Event signaled when a thread changes its background mode */
168 static HANDLE background_change_event;
170 /* The table for small ID assignment */
171 static CRITICAL_SECTION small_id_mutex;
172 static int small_id_table_size = 0;
173 static int small_id_next = 0;
174 static int highest_small_id = -1;
175 static MonoThread **small_id_table = NULL;
177 /* The hazard table */
178 #define HAZARD_TABLE_MAX_SIZE 16384 /* There cannot be more threads than this number. */
179 static volatile int hazard_table_size = 0;
180 static MonoThreadHazardPointers * volatile hazard_table = NULL;
182 /* The table where we keep pointers to blocks to be freed but that
183 have to wait because they're guarded by a hazard pointer. */
184 static CRITICAL_SECTION delayed_free_table_mutex;
185 static GArray *delayed_free_table = NULL;
188 mono_thread_get_tls_key (void)
190 return current_object_key;
194 mono_thread_get_tls_offset (void)
197 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
201 /* handle_store() and handle_remove() manage the array of threads that
202 * still need to be waited for when the main thread exits.
204 static void handle_store(MonoThread *thread)
206 mono_threads_lock ();
208 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->tid));
211 MONO_GC_REGISTER_ROOT (threads);
212 threads=mono_g_hash_table_new(NULL, NULL);
215 /* We don't need to duplicate thread->handle, because it is
216 * only closed when the thread object is finalized by the GC.
218 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->tid),
221 mono_threads_unlock ();
224 static gboolean handle_remove(MonoThread *thread)
227 gsize tid = thread->tid;
229 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
231 mono_threads_lock ();
234 /* We have to check whether the thread object for the
235 * tid is still the same in the table because the
236 * thread might have been destroyed and the tid reused
237 * in the meantime, in which case the tid would be in
238 * the table, but with another thread object.
240 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
241 mono_g_hash_table_remove (threads, (gpointer)tid);
250 mono_threads_unlock ();
252 /* Don't close the handle here, wait for the object finalizer
253 * to do it. Otherwise, the following race condition applies:
255 * 1) Thread exits (and handle_remove() closes the handle)
257 * 2) Some other handle is reassigned the same slot
259 * 3) Another thread tries to join the first thread, and
260 * blocks waiting for the reassigned handle to be signalled
261 * (which might never happen). This is possible, because the
262 * thread calling Join() still has a reference to the first
269 * Allocate a small thread id.
271 * FIXME: The biggest part of this function is very similar to
272 * domain_id_alloc() in domain.c and should be merged.
275 small_id_alloc (MonoThread *thread)
279 EnterCriticalSection (&small_id_mutex);
281 if (!small_id_table) {
282 small_id_table_size = 2;
283 small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoThread*), NULL);
285 for (i = small_id_next; i < small_id_table_size; ++i) {
286 if (!small_id_table [i]) {
292 for (i = 0; i < small_id_next; ++i) {
293 if (!small_id_table [i]) {
300 MonoThread **new_table;
301 int new_size = small_id_table_size * 2;
302 if (new_size >= (1 << 16))
303 g_assert_not_reached ();
304 id = small_id_table_size;
305 new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoThread*), NULL);
306 memcpy (new_table, small_id_table, small_id_table_size * sizeof (void*));
307 mono_gc_free_fixed (small_id_table);
308 small_id_table = new_table;
309 small_id_table_size = new_size;
311 thread->small_id = id;
312 g_assert (small_id_table [id] == NULL);
313 small_id_table [id] = thread;
315 if (small_id_next > small_id_table_size)
318 if (id >= hazard_table_size) {
320 int pagesize = mono_pagesize ();
321 int num_pages = (hazard_table_size * sizeof (MonoThreadHazardPointers) + pagesize - 1) / pagesize;
323 if (hazard_table == NULL) {
324 hazard_table = mono_valloc (NULL,
325 sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE,
329 g_assert (hazard_table != NULL);
330 page_addr = (guint8*)hazard_table + num_pages * pagesize;
332 g_assert (id < HAZARD_TABLE_MAX_SIZE);
334 mono_mprotect (page_addr, pagesize, MONO_MMAP_READ | MONO_MMAP_WRITE);
337 hazard_table_size = num_pages * pagesize / sizeof (MonoThreadHazardPointers);
339 g_assert (id < hazard_table_size);
341 hazard_table [id].hazard_pointers [0] = NULL;
342 hazard_table [id].hazard_pointers [1] = NULL;
345 if (id > highest_small_id) {
346 highest_small_id = id;
347 mono_memory_write_barrier ();
350 LeaveCriticalSection (&small_id_mutex);
356 small_id_free (int id)
358 g_assert (id >= 0 && id < small_id_table_size);
359 g_assert (small_id_table [id] != NULL);
361 small_id_table [id] = NULL;
365 is_pointer_hazardous (gpointer p)
368 int highest = highest_small_id;
370 g_assert (highest < hazard_table_size);
372 for (i = 0; i <= highest; ++i) {
373 if (hazard_table [i].hazard_pointers [0] == p
374 || hazard_table [i].hazard_pointers [1] == p)
381 MonoThreadHazardPointers*
382 mono_hazard_pointer_get (void)
384 MonoThread *current_thread = mono_thread_current ();
386 g_assert (current_thread && current_thread->small_id >= 0);
388 return &hazard_table [current_thread->small_id];
392 mono_thread_hazardous_free_or_queue (gpointer p, MonoHazardousFreeFunc free_func)
396 /* First try to free a few entries in the delayed free
398 for (i = 2; i >= 0; --i) {
399 if (delayed_free_table->len > i) {
400 DelayedFreeItem item;
403 EnterCriticalSection (&delayed_free_table_mutex);
404 /* We have to check the length again because another
405 thread might have freed an item before we acquired
407 if (delayed_free_table->len > i) {
408 item = g_array_index (delayed_free_table, DelayedFreeItem, i);
410 if (!is_pointer_hazardous (item.p))
411 g_array_remove_index_fast (delayed_free_table, i);
415 LeaveCriticalSection (&delayed_free_table_mutex);
418 item.free_func (item.p);
422 /* Now see if the pointer we're freeing is hazardous. If it
423 isn't, free it. Otherwise put it in the delay list. */
424 if (is_pointer_hazardous (p)) {
425 DelayedFreeItem item = { p, free_func };
427 ++mono_stats.hazardous_pointer_count;
429 EnterCriticalSection (&delayed_free_table_mutex);
430 g_array_append_val (delayed_free_table, item);
431 LeaveCriticalSection (&delayed_free_table_mutex);
437 * NOTE: this function can be called also for threads different from the current one:
438 * make sure no code called from it will ever assume it is run on the thread that is
439 * getting cleaned up.
441 static void thread_cleanup (MonoThread *thread)
443 g_assert (thread != NULL);
445 /* if the thread is not in the hash it has been removed already */
446 if (!handle_remove (thread))
448 mono_release_type_locks (thread);
450 if (!mono_monitor_enter (thread->synch_lock))
453 thread->state |= ThreadState_Stopped;
454 thread->state &= ~ThreadState_Background;
455 mono_monitor_exit (thread->synch_lock);
457 mono_profiler_thread_end (thread->tid);
459 if (thread == mono_thread_current ())
460 mono_thread_pop_appdomain_ref ();
462 if (thread->serialized_culture_info)
463 g_free (thread->serialized_culture_info);
465 thread->cached_culture_info = NULL;
467 mono_gc_free_fixed (thread->static_data);
468 thread->static_data = NULL;
470 if (mono_thread_cleanup_fn)
471 mono_thread_cleanup_fn (thread);
473 small_id_free (thread->small_id);
474 thread->small_id = -2;
477 static guint32 WINAPI start_wrapper(void *data)
479 struct StartInfo *start_info=(struct StartInfo *)data;
480 guint32 (*start_func)(void *);
483 MonoThread *thread=start_info->obj;
484 MonoObject *start_delegate = start_info->delegate;
486 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
488 /* We can be sure start_info->obj->tid and
489 * start_info->obj->handle have been set, because the thread
490 * was created suspended, and these values were set before the
496 SET_CURRENT_OBJECT (thread);
498 /* Every thread references the appdomain which created it */
499 mono_thread_push_appdomain_ref (start_info->domain);
501 if (!mono_domain_set (start_info->domain, FALSE)) {
502 /* No point in raising an appdomain_unloaded exception here */
503 /* FIXME: Cleanup here */
504 mono_thread_pop_appdomain_ref ();
508 start_func = start_info->func;
509 start_arg = start_info->start_arg;
511 /* This MUST be called before any managed code can be
512 * executed, as it calls the callback function that (for the
513 * jit) sets the lmf marker.
515 mono_thread_new_init (tid, &tid, start_func);
516 thread->stack_ptr = &tid;
518 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
520 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
522 mono_profiler_thread_start (tid);
524 /* On 2.0 profile (and higher), set explicitly since state might have been
526 if (mono_get_runtime_info ()->framework_version [0] != '1') {
527 if (thread->apartment_state == ThreadApartmentState_Unknown)
528 thread->apartment_state = ThreadApartmentState_MTA;
531 mono_thread_init_apartment_state ();
533 if(thread->start_notify!=NULL) {
534 /* Let the thread that called Start() know we're
537 ReleaseSemaphore (thread->start_notify, 1, NULL);
542 thread_adjust_static_data (thread);
544 g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
548 /* start_func is set only for unmanaged start functions */
550 start_func (start_arg);
553 g_assert (start_delegate != NULL);
554 args [0] = start_arg;
555 /* we may want to handle the exception here. See comment below on unhandled exceptions */
556 mono_runtime_delegate_invoke (start_delegate, args, NULL);
559 /* If the thread calls ExitThread at all, this remaining code
560 * will not be executed, but the main thread will eventually
561 * call thread_cleanup() on this thread's behalf.
564 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
566 thread_cleanup (thread);
568 /* Do any cleanup needed for apartment state. This
569 * cannot be done in thread_cleanup since thread_cleanup could be
570 * called for a thread other than the current thread.
571 * mono_thread_cleanup_apartment_state cleans up apartment
572 * for the current thead */
573 mono_thread_cleanup_apartment_state ();
575 /* Remove the reference to the thread object in the TLS data,
576 * so the thread object can be finalized. This won't be
577 * reached if the thread threw an uncaught exception, so those
578 * thread handles will stay referenced :-( (This is due to
579 * missing support for scanning thread-specific data in the
580 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
583 SET_CURRENT_OBJECT (NULL);
588 void mono_thread_new_init (gsize tid, gpointer stack_start, gpointer func)
590 if (mono_thread_start_cb) {
591 mono_thread_start_cb (tid, stack_start, func);
595 void mono_threads_set_default_stacksize (guint32 stacksize)
597 default_stacksize = stacksize;
600 guint32 mono_threads_get_default_stacksize (void)
602 return default_stacksize;
605 void mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
608 HANDLE thread_handle;
609 struct StartInfo *start_info;
612 thread=(MonoThread *)mono_object_new (domain,
613 mono_defaults.thread_class);
615 start_info=g_new0 (struct StartInfo, 1);
616 start_info->func = func;
617 start_info->obj = thread;
618 start_info->domain = domain;
619 start_info->start_arg = arg;
621 /* Create suspended, so we can do some housekeeping before the thread
624 thread_handle = CreateThread(NULL, default_stacksize_for_thread (thread), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
625 CREATE_SUSPENDED, &tid);
626 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
627 if (thread_handle == NULL) {
628 /* The thread couldn't be created, so throw an exception */
629 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
633 thread->handle=thread_handle;
635 thread->apartment_state=ThreadApartmentState_Unknown;
636 small_id_alloc (thread);
638 MONO_OBJECT_SETREF (thread, synch_lock, mono_object_new (domain, mono_defaults.object_class));
640 handle_store(thread);
642 ResumeThread (thread_handle);
646 * mono_thread_get_stack_bounds:
648 * Return the address and size of the current threads stack. Return NULL as the stack
649 * address if the stack address cannot be determined.
652 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
654 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
655 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
656 *stsize = pthread_get_stacksize_np (pthread_self ());
658 /* FIXME: simplify the mess below */
659 #elif !defined(PLATFORM_WIN32)
661 guint8 *current = (guint8*)&attr;
663 pthread_attr_init (&attr);
664 #ifdef HAVE_PTHREAD_GETATTR_NP
665 pthread_getattr_np (pthread_self(), &attr);
667 #ifdef HAVE_PTHREAD_ATTR_GET_NP
668 pthread_attr_get_np (pthread_self(), &attr);
671 pthread_attr_getstacksize (&attr, &stsize);
680 pthread_attr_getstack (&attr, (void**)staddr, stsize);
682 g_assert ((current > *staddr) && (current < *staddr + *stsize));
685 pthread_attr_destroy (&attr);
690 mono_thread_attach (MonoDomain *domain)
693 HANDLE thread_handle;
696 if ((thread = mono_thread_current ())) {
697 if (domain != mono_domain_get ())
698 mono_domain_set (domain, TRUE);
699 /* Already attached */
703 if (!mono_gc_register_thread (&domain)) {
704 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 ());
707 thread = (MonoThread *)mono_object_new (domain,
708 mono_defaults.thread_class);
710 thread_handle = GetCurrentThread ();
711 g_assert (thread_handle);
713 tid=GetCurrentThreadId ();
716 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
717 * refer to the thread from other threads for things like aborting.
719 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
720 THREAD_ALL_ACCESS, TRUE, 0);
722 thread->handle=thread_handle;
724 thread->apartment_state=ThreadApartmentState_Unknown;
725 small_id_alloc (thread);
726 thread->stack_ptr = &tid;
727 MONO_OBJECT_SETREF (thread, synch_lock, mono_object_new (domain, mono_defaults.object_class));
729 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
731 handle_store(thread);
733 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
735 SET_CURRENT_OBJECT (thread);
736 mono_domain_set (domain, TRUE);
738 thread_adjust_static_data (thread);
740 if (mono_thread_attach_cb) {
744 mono_thread_get_stack_bounds (&staddr, &stsize);
747 mono_thread_attach_cb (tid, &tid);
749 mono_thread_attach_cb (tid, staddr + stsize);
756 mono_thread_detach (MonoThread *thread)
758 g_return_if_fail (thread != NULL);
760 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
762 thread_cleanup (thread);
764 SET_CURRENT_OBJECT (NULL);
766 /* Don't need to CloseHandle this thread, even though we took a
767 * reference in mono_thread_attach (), because the GC will do it
768 * when the Thread object is finalised.
775 MonoThread *thread = mono_thread_current ();
777 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
779 thread_cleanup (thread);
780 SET_CURRENT_OBJECT (NULL);
782 /* we could add a callback here for embedders to use. */
783 if (thread == mono_thread_get_main ())
784 exit (mono_environment_exitcode_get ());
788 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
791 guint32 (*start_func)(void *);
792 struct StartInfo *start_info;
798 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
800 mono_monitor_enter (this->synch_lock);
802 if ((this->state & ThreadState_Unstarted) == 0) {
803 mono_monitor_exit (this->synch_lock);
804 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
810 if ((this->state & ThreadState_Aborted) != 0) {
811 mono_monitor_exit (this->synch_lock);
816 /* This is freed in start_wrapper */
817 start_info = g_new0 (struct StartInfo, 1);
818 start_info->func = start_func;
819 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
820 start_info->delegate = start;
821 start_info->obj = this;
822 start_info->domain = mono_domain_get ();
824 this->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
825 if(this->start_notify==NULL) {
826 mono_monitor_exit (this->synch_lock);
827 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
831 thread=CreateThread(NULL, default_stacksize_for_thread (this), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
832 CREATE_SUSPENDED, &tid);
834 mono_monitor_exit (this->synch_lock);
835 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
841 small_id_alloc (this);
843 /* Don't call handle_store() here, delay it to Start.
844 * We can't join a thread (trying to will just block
845 * forever) until it actually starts running, so don't
846 * store the handle till then.
849 mono_thread_start (this);
851 this->state &= ~ThreadState_Unstarted;
853 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
855 mono_monitor_exit (this->synch_lock);
860 void ves_icall_System_Threading_Thread_Thread_free_internal (MonoThread *this,
865 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
867 CloseHandle (thread);
870 static void mono_thread_start (MonoThread *thread)
874 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
876 /* Only store the handle when the thread is about to be
877 * launched, to avoid the main thread deadlocking while trying
878 * to clean up a thread that will never be signalled.
880 handle_store (thread);
882 ResumeThread (thread->handle);
884 if(thread->start_notify!=NULL) {
885 /* Wait for the thread to set up its TLS data etc, so
886 * theres no potential race condition if someone tries
887 * to look up the data believing the thread has
891 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
893 WaitForSingleObjectEx (thread->start_notify, INFINITE, FALSE);
894 CloseHandle (thread->start_notify);
895 thread->start_notify = NULL;
898 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
901 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
903 MonoThread *thread = mono_thread_current ();
907 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
909 mono_thread_current_check_pending_interrupt ();
911 mono_monitor_enter (thread->synch_lock);
912 thread->state |= ThreadState_WaitSleepJoin;
913 mono_monitor_exit (thread->synch_lock);
917 mono_monitor_enter (thread->synch_lock);
918 thread->state &= ~ThreadState_WaitSleepJoin;
919 mono_monitor_exit (thread->synch_lock);
922 void ves_icall_System_Threading_Thread_SpinWait_internal (gint32 iterations)
926 for(i = 0; i < iterations; i++) {
927 /* We're busy waiting, but at least we can tell the
928 * scheduler to let someone else have a go...
935 ves_icall_System_Threading_Thread_GetDomainID (void)
939 return mono_domain_get()->domain_id;
943 ves_icall_System_Threading_Thread_GetName_internal (MonoThread *this_obj)
946 mono_monitor_enter (this_obj->synch_lock);
951 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
953 mono_monitor_exit (this_obj->synch_lock);
958 ves_icall_System_Threading_Thread_SetName_internal (MonoThread *this_obj, MonoString *name)
960 mono_monitor_enter (this_obj->synch_lock);
962 if (this_obj->name) {
963 mono_monitor_exit (this_obj->synch_lock);
964 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
968 this_obj->name = g_new (gunichar2, mono_string_length (name));
969 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
970 this_obj->name_len = mono_string_length (name);
973 this_obj->name = NULL;
975 mono_monitor_exit (this_obj->synch_lock);
979 lookup_cached_culture (MonoThread *this, MonoDomain *domain, int start_idx)
984 if (this->cached_culture_info) {
985 domain = mono_domain_get ();
986 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
987 res = mono_array_get (this->cached_culture_info, MonoObject*, i);
988 if (res && res->vtable->domain == domain)
997 ves_icall_System_Threading_Thread_GetCachedCurrentCulture (MonoThread *this)
999 return lookup_cached_culture (this, mono_domain_get (), CULTURES_START_IDX);
1003 ves_icall_System_Threading_Thread_GetSerializedCurrentCulture (MonoThread *this)
1007 mono_monitor_enter (this->synch_lock);
1008 if (this->serialized_culture_info) {
1009 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_culture_info_len);
1010 memcpy (mono_array_addr (res, guint8, 0), this->serialized_culture_info, this->serialized_culture_info_len);
1014 mono_monitor_exit (this->synch_lock);
1020 cache_culture (MonoThread *this, MonoObject *culture, int start_idx)
1023 MonoDomain *domain = mono_domain_get ();
1026 int same_domain_slot = -1;
1028 mono_monitor_enter (this->synch_lock);
1029 if (!this->cached_culture_info)
1030 this->cached_culture_info = mono_array_new (mono_object_domain (this), mono_defaults.object_class, NUM_CACHED_CULTURES * 2);
1032 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1033 obj = mono_array_get (this->cached_culture_info, MonoObject*, i);
1037 /* we continue, because there may be a slot used with the same domain */
1041 if (obj->vtable->domain == domain) {
1042 same_domain_slot = i;
1046 if (same_domain_slot >= 0)
1047 mono_array_setref (this->cached_culture_info, same_domain_slot, culture);
1048 else if (free_slot >= 0)
1049 mono_array_setref (this->cached_culture_info, free_slot, culture);
1050 /* we may want to replace an existing entry here, even when no suitable slot is found */
1051 mono_monitor_exit (this->synch_lock);
1055 ves_icall_System_Threading_Thread_SetCachedCurrentCulture (MonoThread *this, MonoObject *culture)
1057 cache_culture (this, culture, CULTURES_START_IDX);
1061 ves_icall_System_Threading_Thread_SetSerializedCurrentCulture (MonoThread *this, MonoArray *arr)
1063 mono_monitor_enter (this->synch_lock);
1064 if (this->serialized_culture_info)
1065 g_free (this->serialized_culture_info);
1066 this->serialized_culture_info = g_new0 (guint8, mono_array_length (arr));
1067 this->serialized_culture_info_len = mono_array_length (arr);
1068 memcpy (this->serialized_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1069 mono_monitor_exit (this->synch_lock);
1074 ves_icall_System_Threading_Thread_GetCachedCurrentUICulture (MonoThread *this)
1076 return lookup_cached_culture (this, mono_domain_get (), UICULTURES_START_IDX);
1080 ves_icall_System_Threading_Thread_GetSerializedCurrentUICulture (MonoThread *this)
1084 mono_monitor_enter (this->synch_lock);
1085 if (this->serialized_ui_culture_info) {
1086 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_ui_culture_info_len);
1087 memcpy (mono_array_addr (res, guint8, 0), this->serialized_ui_culture_info, this->serialized_ui_culture_info_len);
1091 mono_monitor_exit (this->synch_lock);
1097 ves_icall_System_Threading_Thread_SetCachedCurrentUICulture (MonoThread *this, MonoObject *culture)
1099 cache_culture (this, culture, UICULTURES_START_IDX);
1103 ves_icall_System_Threading_Thread_SetSerializedCurrentUICulture (MonoThread *this, MonoArray *arr)
1105 mono_monitor_enter (this->synch_lock);
1106 if (this->serialized_ui_culture_info)
1107 g_free (this->serialized_ui_culture_info);
1108 this->serialized_ui_culture_info = g_new0 (guint8, mono_array_length (arr));
1109 this->serialized_ui_culture_info_len = mono_array_length (arr);
1110 memcpy (this->serialized_ui_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1111 mono_monitor_exit (this->synch_lock);
1114 /* the jit may read the compiled code of this function */
1116 mono_thread_current (void)
1118 THREAD_DEBUG (g_message ("%s: returning %p", __func__, GET_CURRENT_OBJECT ()));
1119 return GET_CURRENT_OBJECT ();
1122 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoThread *this,
1123 int ms, HANDLE thread)
1127 MONO_ARCH_SAVE_REGS;
1129 mono_monitor_enter (this->synch_lock);
1131 if ((this->state & ThreadState_Unstarted) != 0) {
1132 mono_monitor_exit (this->synch_lock);
1133 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1137 mono_thread_current_check_pending_interrupt ();
1139 this->state |= ThreadState_WaitSleepJoin;
1140 mono_monitor_exit (this->synch_lock);
1145 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1147 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1149 mono_monitor_enter (this->synch_lock);
1150 this->state &= ~ThreadState_WaitSleepJoin;
1151 mono_monitor_exit (this->synch_lock);
1153 if(ret==WAIT_OBJECT_0) {
1154 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1159 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1164 /* FIXME: exitContext isnt documented */
1165 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1171 MonoObject *waitHandle;
1172 MonoThread *thread = mono_thread_current ();
1174 MONO_ARCH_SAVE_REGS;
1176 /* Do this WaitSleepJoin check before creating objects */
1177 mono_thread_current_check_pending_interrupt ();
1179 numhandles = mono_array_length(mono_handles);
1180 handles = g_new0(HANDLE, numhandles);
1182 for(i = 0; i < numhandles; i++) {
1183 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1184 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1191 mono_monitor_enter (thread->synch_lock);
1192 thread->state |= ThreadState_WaitSleepJoin;
1193 mono_monitor_exit (thread->synch_lock);
1195 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1197 mono_monitor_enter (thread->synch_lock);
1198 thread->state &= ~ThreadState_WaitSleepJoin;
1199 mono_monitor_exit (thread->synch_lock);
1203 if(ret==WAIT_FAILED) {
1204 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1206 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1207 /* Do we want to try again if we get
1208 * WAIT_IO_COMPLETION? The documentation for
1209 * WaitHandle doesn't give any clues. (We'd have to
1210 * fiddle with the timeout if we retry.)
1212 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1219 /* FIXME: exitContext isnt documented */
1220 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1226 MonoObject *waitHandle;
1227 MonoThread *thread = mono_thread_current ();
1229 MONO_ARCH_SAVE_REGS;
1231 /* Do this WaitSleepJoin check before creating objects */
1232 mono_thread_current_check_pending_interrupt ();
1234 numhandles = mono_array_length(mono_handles);
1235 handles = g_new0(HANDLE, numhandles);
1237 for(i = 0; i < numhandles; i++) {
1238 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1239 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1246 mono_monitor_enter (thread->synch_lock);
1247 thread->state |= ThreadState_WaitSleepJoin;
1248 mono_monitor_exit (thread->synch_lock);
1250 ret=WaitForMultipleObjectsEx(numhandles, handles, FALSE, ms, TRUE);
1252 mono_monitor_enter (thread->synch_lock);
1253 thread->state &= ~ThreadState_WaitSleepJoin;
1254 mono_monitor_exit (thread->synch_lock);
1258 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1261 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1263 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1264 return ret - WAIT_OBJECT_0;
1266 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1267 return ret - WAIT_ABANDONED_0;
1274 /* FIXME: exitContext isnt documented */
1275 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1278 MonoThread *thread = mono_thread_current ();
1280 MONO_ARCH_SAVE_REGS;
1282 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1288 mono_thread_current_check_pending_interrupt ();
1290 mono_monitor_enter (thread->synch_lock);
1291 thread->state |= ThreadState_WaitSleepJoin;
1292 mono_monitor_exit (thread->synch_lock);
1294 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1296 mono_monitor_enter (thread->synch_lock);
1297 thread->state &= ~ThreadState_WaitSleepJoin;
1298 mono_monitor_exit (thread->synch_lock);
1300 if(ret==WAIT_FAILED) {
1301 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1303 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1304 /* Do we want to try again if we get
1305 * WAIT_IO_COMPLETION? The documentation for
1306 * WaitHandle doesn't give any clues. (We'd have to
1307 * fiddle with the timeout if we retry.)
1309 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1316 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1320 MONO_ARCH_SAVE_REGS;
1325 mutex = CreateMutex (NULL, owned, NULL);
1327 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1329 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1337 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1338 MONO_ARCH_SAVE_REGS;
1340 return(ReleaseMutex (handle));
1343 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1349 MONO_ARCH_SAVE_REGS;
1351 *error = ERROR_SUCCESS;
1353 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1355 *error = GetLastError ();
1362 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1366 MONO_ARCH_SAVE_REGS;
1371 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1373 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1374 mono_string_chars (name));
1376 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1384 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1388 MONO_ARCH_SAVE_REGS;
1390 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1395 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1399 MONO_ARCH_SAVE_REGS;
1401 *error = ERROR_SUCCESS;
1403 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1405 *error = GetLastError ();
1411 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1415 MONO_ARCH_SAVE_REGS;
1420 event = CreateEvent (NULL, manual, initial, NULL);
1422 event = CreateEvent (NULL, manual, initial,
1423 mono_string_chars (name));
1425 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1433 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1434 MONO_ARCH_SAVE_REGS;
1436 return (SetEvent(handle));
1439 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1440 MONO_ARCH_SAVE_REGS;
1442 return (ResetEvent(handle));
1446 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1447 MONO_ARCH_SAVE_REGS;
1449 CloseHandle (handle);
1452 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1458 MONO_ARCH_SAVE_REGS;
1460 *error = ERROR_SUCCESS;
1462 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1464 *error = GetLastError ();
1470 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1472 MONO_ARCH_SAVE_REGS;
1474 return InterlockedIncrement (location);
1477 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1481 MONO_ARCH_SAVE_REGS;
1483 mono_interlocked_lock ();
1487 mono_interlocked_unlock ();
1493 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1495 MONO_ARCH_SAVE_REGS;
1497 return InterlockedDecrement(location);
1500 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1504 MONO_ARCH_SAVE_REGS;
1506 mono_interlocked_lock ();
1510 mono_interlocked_unlock ();
1515 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1517 MONO_ARCH_SAVE_REGS;
1519 return InterlockedExchange(location, value);
1522 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1524 MONO_ARCH_SAVE_REGS;
1526 return (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1529 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1531 IntFloatUnion val, ret;
1533 MONO_ARCH_SAVE_REGS;
1536 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1542 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1544 #if SIZEOF_VOID_P == 8
1545 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1550 * According to MSDN, this function is only atomic with regards to the
1551 * other Interlocked functions on 32 bit platforms.
1553 mono_interlocked_lock ();
1556 mono_interlocked_unlock ();
1563 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1565 #if SIZEOF_VOID_P == 8
1566 LongDoubleUnion val, ret;
1569 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1576 * According to MSDN, this function is only atomic with regards to the
1577 * other Interlocked functions on 32 bit platforms.
1579 mono_interlocked_lock ();
1582 mono_interlocked_unlock ();
1588 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1590 MONO_ARCH_SAVE_REGS;
1592 return InterlockedCompareExchange(location, value, comparand);
1595 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1597 MONO_ARCH_SAVE_REGS;
1599 return (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1602 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1604 IntFloatUnion val, ret, cmp;
1606 MONO_ARCH_SAVE_REGS;
1609 cmp.fval = comparand;
1610 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1616 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1618 #if SIZEOF_VOID_P == 8
1619 LongDoubleUnion val, comp, ret;
1622 comp.fval = comparand;
1623 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1629 mono_interlocked_lock ();
1631 if (old == comparand)
1633 mono_interlocked_unlock ();
1640 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1642 #if SIZEOF_VOID_P == 8
1643 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1647 mono_interlocked_lock ();
1649 if (old == comparand)
1651 mono_interlocked_unlock ();
1658 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1660 MONO_ARCH_SAVE_REGS;
1662 return InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1666 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1668 MONO_ARCH_SAVE_REGS;
1670 return InterlockedExchangePointer ((gpointer *)location, value);
1674 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1676 #if SIZEOF_VOID_P == 8
1677 /* Should be implemented as a JIT intrinsic */
1678 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1683 mono_interlocked_lock ();
1685 *location = orig + value;
1686 mono_interlocked_unlock ();
1688 return orig + value;
1693 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1695 #if SIZEOF_VOID_P == 8
1696 /* Should be implemented as a JIT intrinsic */
1697 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1702 mono_interlocked_lock ();
1704 *location = orig + value;
1705 mono_interlocked_unlock ();
1707 return orig + value;
1712 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1714 #if SIZEOF_VOID_P == 8
1715 /* 64 bit reads are already atomic */
1720 mono_interlocked_lock ();
1722 mono_interlocked_unlock ();
1729 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1731 mono_threads_lock ();
1732 mono_threads_unlock ();
1736 ves_icall_System_Threading_Thread_ClrState (MonoThread* this, guint32 state)
1738 mono_monitor_enter (this->synch_lock);
1739 this->state &= ~state;
1740 if (state & ThreadState_Background) {
1741 /* If the thread changes the background mode, the main thread has to
1742 * be notified, since it has to rebuild the list of threads to
1745 SetEvent (background_change_event);
1747 mono_monitor_exit (this->synch_lock);
1751 ves_icall_System_Threading_Thread_SetState (MonoThread* this, guint32 state)
1753 mono_monitor_enter (this->synch_lock);
1754 this->state |= state;
1755 if (state & ThreadState_Background) {
1756 /* If the thread changes the background mode, the main thread has to
1757 * be notified, since it has to rebuild the list of threads to
1760 SetEvent (background_change_event);
1762 mono_monitor_exit (this->synch_lock);
1766 ves_icall_System_Threading_Thread_GetState (MonoThread* this)
1769 mono_monitor_enter (this->synch_lock);
1770 state = this->state;
1771 mono_monitor_exit (this->synch_lock);
1775 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this)
1777 gboolean throw = FALSE;
1779 mono_monitor_enter (this->synch_lock);
1781 /* Clear out any previous request */
1782 this->thread_interrupt_requested = FALSE;
1784 if (this->state & ThreadState_WaitSleepJoin) {
1787 this->thread_interrupt_requested = TRUE;
1790 mono_monitor_exit (this->synch_lock);
1793 signal_thread_state_change (this);
1797 void mono_thread_current_check_pending_interrupt ()
1799 MonoThread *thread = mono_thread_current ();
1800 gboolean throw = FALSE;
1802 mono_monitor_enter (thread->synch_lock);
1804 if (thread->thread_interrupt_requested) {
1806 thread->thread_interrupt_requested = FALSE;
1809 mono_monitor_exit (thread->synch_lock);
1812 mono_raise_exception (mono_get_exception_thread_interrupted ());
1817 mono_thread_get_abort_signal (void)
1819 #ifdef PLATFORM_WIN32
1825 static int abort_signum = -1;
1827 if (abort_signum != -1)
1828 return abort_signum;
1829 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1830 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1831 struct sigaction sinfo;
1832 sigaction (i, NULL, &sinfo);
1833 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
1838 /* fallback to the old way */
1841 #endif /* PLATFORM_WIN32 */
1844 #ifdef PLATFORM_WIN32
1845 static void CALLBACK interruption_request_apc (ULONG_PTR param)
1847 MonoException* exc = mono_thread_request_interruption (FALSE);
1848 if (exc) mono_raise_exception (exc);
1850 #endif /* PLATFORM_WIN32 */
1853 * signal_thread_state_change
1855 * Tells the thread that his state has changed and it has to enter the new
1856 * state as soon as possible.
1858 static void signal_thread_state_change (MonoThread *thread)
1860 if (thread == mono_thread_current ()) {
1861 /* Do it synchronously */
1862 MonoException *exc = mono_thread_request_interruption (FALSE);
1864 mono_raise_exception (exc);
1867 #ifdef PLATFORM_WIN32
1868 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
1870 /* fixme: store the state somewhere */
1871 #ifdef PTHREAD_POINTER_ID
1872 pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
1874 pthread_kill (thread->tid, mono_thread_get_abort_signal ());
1876 #endif /* PLATFORM_WIN32 */
1880 ves_icall_System_Threading_Thread_Abort (MonoThread *thread, MonoObject *state)
1882 MONO_ARCH_SAVE_REGS;
1884 mono_monitor_enter (thread->synch_lock);
1886 if ((thread->state & ThreadState_AbortRequested) != 0 ||
1887 (thread->state & ThreadState_StopRequested) != 0 ||
1888 (thread->state & ThreadState_Stopped) != 0)
1890 mono_monitor_exit (thread->synch_lock);
1894 if ((thread->state & ThreadState_Unstarted) != 0) {
1895 thread->state |= ThreadState_Aborted;
1896 mono_monitor_exit (thread->synch_lock);
1900 thread->state |= ThreadState_AbortRequested;
1901 MONO_OBJECT_SETREF (thread, abort_state, state);
1902 thread->abort_exc = NULL;
1904 mono_monitor_exit (thread->synch_lock);
1906 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1908 /* Make sure the thread is awake */
1909 mono_thread_resume (thread);
1911 signal_thread_state_change (thread);
1915 ves_icall_System_Threading_Thread_ResetAbort (void)
1917 MonoThread *thread = mono_thread_current ();
1919 MONO_ARCH_SAVE_REGS;
1921 mono_monitor_enter (thread->synch_lock);
1923 thread->state &= ~ThreadState_AbortRequested;
1925 if (!thread->abort_exc) {
1926 const char *msg = "Unable to reset abort because no abort was requested";
1927 mono_monitor_exit (thread->synch_lock);
1928 mono_raise_exception (mono_get_exception_thread_state (msg));
1930 thread->abort_exc = NULL;
1931 thread->abort_state = NULL;
1934 mono_monitor_exit (thread->synch_lock);
1938 mono_thread_suspend (MonoThread *thread)
1940 MONO_ARCH_SAVE_REGS;
1942 mono_monitor_enter (thread->synch_lock);
1944 if ((thread->state & ThreadState_Unstarted) != 0 ||
1945 (thread->state & ThreadState_Aborted) != 0 ||
1946 (thread->state & ThreadState_Stopped) != 0)
1948 mono_monitor_exit (thread->synch_lock);
1952 if ((thread->state & ThreadState_Suspended) != 0 ||
1953 (thread->state & ThreadState_SuspendRequested) != 0 ||
1954 (thread->state & ThreadState_StopRequested) != 0)
1956 mono_monitor_exit (thread->synch_lock);
1960 thread->state |= ThreadState_SuspendRequested;
1961 mono_monitor_exit (thread->synch_lock);
1963 signal_thread_state_change (thread);
1968 ves_icall_System_Threading_Thread_Suspend (MonoThread *thread)
1970 if (!mono_thread_suspend (thread))
1971 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
1975 mono_thread_resume (MonoThread *thread)
1977 MONO_ARCH_SAVE_REGS;
1979 mono_monitor_enter (thread->synch_lock);
1981 if ((thread->state & ThreadState_SuspendRequested) != 0) {
1982 thread->state &= ~ThreadState_SuspendRequested;
1983 mono_monitor_exit (thread->synch_lock);
1987 if ((thread->state & ThreadState_Suspended) == 0 ||
1988 (thread->state & ThreadState_Unstarted) != 0 ||
1989 (thread->state & ThreadState_Aborted) != 0 ||
1990 (thread->state & ThreadState_Stopped) != 0)
1992 mono_monitor_exit (thread->synch_lock);
1996 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
1997 if (thread->resume_event == NULL) {
1998 mono_monitor_exit (thread->synch_lock);
2002 /* Awake the thread */
2003 SetEvent (thread->suspend_event);
2005 mono_monitor_exit (thread->synch_lock);
2007 /* Wait for the thread to awake */
2008 WaitForSingleObject (thread->resume_event, INFINITE);
2009 CloseHandle (thread->resume_event);
2010 thread->resume_event = NULL;
2016 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2018 if (!mono_thread_resume (thread))
2019 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2023 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2028 if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
2029 m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
2030 m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
2032 *((gboolean*)data) = TRUE;
2039 is_running_protected_wrapper (void)
2041 gboolean found = FALSE;
2042 mono_stack_walk (find_wrapper, &found);
2046 void mono_thread_stop (MonoThread *thread)
2048 mono_monitor_enter (thread->synch_lock);
2050 if ((thread->state & ThreadState_StopRequested) != 0 ||
2051 (thread->state & ThreadState_Stopped) != 0)
2053 mono_monitor_exit (thread->synch_lock);
2057 /* Make sure the thread is awake */
2058 mono_thread_resume (thread);
2060 thread->state |= ThreadState_StopRequested;
2061 thread->state &= ~ThreadState_AbortRequested;
2063 mono_monitor_exit (thread->synch_lock);
2065 signal_thread_state_change (thread);
2069 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2071 return *((volatile gint8 *) (ptr));
2075 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2077 return *((volatile gint16 *) (ptr));
2081 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2083 return *((volatile gint32 *) (ptr));
2087 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2089 return *((volatile gint64 *) (ptr));
2093 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2095 return (void *) *((volatile void **) ptr);
2099 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2101 *((volatile gint8 *) ptr) = value;
2105 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2107 *((volatile gint16 *) ptr) = value;
2111 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2113 *((volatile gint32 *) ptr) = value;
2117 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2119 *((volatile gint64 *) ptr) = value;
2123 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2125 *((volatile void **) ptr) = value;
2128 void mono_thread_init (MonoThreadStartCB start_cb,
2129 MonoThreadAttachCB attach_cb)
2131 MONO_GC_REGISTER_ROOT (small_id_table);
2132 InitializeCriticalSection(&threads_mutex);
2133 InitializeCriticalSection(&interlocked_mutex);
2134 InitializeCriticalSection(&contexts_mutex);
2135 InitializeCriticalSection(&delayed_free_table_mutex);
2136 InitializeCriticalSection(&small_id_mutex);
2137 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2138 g_assert(background_change_event != NULL);
2140 mono_init_static_data_info (&thread_static_info);
2141 mono_init_static_data_info (&context_static_info);
2143 current_object_key=TlsAlloc();
2144 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2146 mono_thread_start_cb = start_cb;
2147 mono_thread_attach_cb = attach_cb;
2149 delayed_free_table = g_array_new (FALSE, FALSE, sizeof (DelayedFreeItem));
2151 /* Get a pseudo handle to the current process. This is just a
2152 * kludge so that wapi can build a process handle if needed.
2153 * As a pseudo handle is returned, we don't need to clean
2156 GetCurrentProcess ();
2159 void mono_thread_cleanup (void)
2161 #if !defined(PLATFORM_WIN32) && !defined(RUN_IN_SUBTHREAD)
2162 /* The main thread must abandon any held mutexes (particularly
2163 * important for named mutexes as they are shared across
2164 * processes, see bug 74680.) This will happen when the
2165 * thread exits, but if it's not running in a subthread it
2166 * won't exit in time.
2168 /* Using non-w32 API is a nasty kludge, but I couldn't find
2169 * anything in the documentation that would let me do this
2170 * here yet still be safe to call on windows.
2172 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2176 /* This stuff needs more testing, it seems one of these
2177 * critical sections can be locked when mono_thread_cleanup is
2180 DeleteCriticalSection (&threads_mutex);
2181 DeleteCriticalSection (&interlocked_mutex);
2182 DeleteCriticalSection (&contexts_mutex);
2183 DeleteCriticalSection (&delayed_free_table_mutex);
2184 DeleteCriticalSection (&small_id_mutex);
2185 CloseHandle (background_change_event);
2188 g_array_free (delayed_free_table, TRUE);
2190 TlsFree (current_object_key);
2194 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2196 mono_thread_cleanup_fn = func;
2200 static void print_tids (gpointer key, gpointer value, gpointer user)
2202 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2203 * sizeof(uint) and a cast to uint would overflow
2205 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2206 * print this as a pointer.
2208 g_message ("Waiting for: %p", key);
2213 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2214 MonoThread *threads[MAXIMUM_WAIT_OBJECTS];
2218 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2222 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2224 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, FALSE);
2226 if(ret==WAIT_FAILED) {
2227 /* See the comment in build_wait_tids() */
2228 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2232 for(i=0; i<wait->num; i++)
2233 CloseHandle (wait->handles[i]);
2235 if (ret == WAIT_TIMEOUT)
2238 for(i=0; i<wait->num; i++) {
2239 gsize tid = wait->threads[i]->tid;
2241 mono_threads_lock ();
2242 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2243 /* This thread must have been killed, because
2244 * it hasn't cleaned itself up. (It's just
2245 * possible that the thread exited before the
2246 * parent thread had a chance to store the
2247 * handle, and now there is another pointer to
2248 * the already-exited thread stored. In this
2249 * case, we'll just get two
2250 * mono_profiler_thread_end() calls for the
2254 mono_threads_unlock ();
2255 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2256 thread_cleanup (wait->threads[i]);
2258 mono_threads_unlock ();
2263 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2265 guint32 i, ret, count;
2267 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2269 /* Add the thread state change event, so it wakes up if a thread changes
2270 * to background mode.
2273 if (count < MAXIMUM_WAIT_OBJECTS) {
2274 wait->handles [count] = background_change_event;
2278 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, FALSE);
2280 if(ret==WAIT_FAILED) {
2281 /* See the comment in build_wait_tids() */
2282 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2286 for(i=0; i<wait->num; i++)
2287 CloseHandle (wait->handles[i]);
2289 if (ret == WAIT_TIMEOUT)
2292 if (ret < wait->num) {
2293 gsize tid = wait->threads[ret]->tid;
2294 mono_threads_lock ();
2295 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2296 /* See comment in wait_for_tids about thread cleanup */
2297 mono_threads_unlock ();
2298 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2299 thread_cleanup (wait->threads [ret]);
2301 mono_threads_unlock ();
2305 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2307 struct wait_data *wait=(struct wait_data *)user;
2309 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2311 MonoThread *thread=(MonoThread *)value;
2313 /* Ignore background threads, we abort them later */
2314 /* Do not lock here since it is not needed and the caller holds threads_lock */
2315 if (thread->state & ThreadState_Background) {
2316 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2317 return; /* just leave, ignore */
2320 if (mono_gc_is_finalizer_thread (thread)) {
2321 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2325 if (thread == mono_thread_current ()) {
2326 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2330 if (thread == mono_thread_get_main ()) {
2331 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2335 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2336 if (handle == NULL) {
2337 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2341 wait->handles[wait->num]=handle;
2342 wait->threads[wait->num]=thread;
2345 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2347 /* Just ignore the rest, we can't do anything with
2354 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2356 struct wait_data *wait=(struct wait_data *)user;
2357 gsize self = GetCurrentThreadId ();
2358 MonoThread *thread = (MonoThread *) value;
2361 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2364 /* The finalizer thread is not a background thread */
2365 if (thread->tid != self && (thread->state & ThreadState_Background) != 0) {
2367 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2371 if(thread->state & ThreadState_AbortRequested ||
2372 thread->state & ThreadState_Aborted) {
2373 THREAD_DEBUG (g_message ("%s: Thread id %"G_GSIZE_FORMAT" already aborting", __func__, (gsize)thread->tid));
2377 /* printf ("A: %d\n", wait->num); */
2378 wait->handles[wait->num]=thread->handle;
2379 wait->threads[wait->num]=thread;
2382 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2383 mono_thread_stop (thread);
2387 return (thread->tid != self && !mono_gc_is_finalizer_thread (thread));
2390 void mono_thread_manage (void)
2392 struct wait_data *wait=g_new0 (struct wait_data, 1);
2394 /* join each thread that's still running */
2395 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2397 mono_threads_lock ();
2399 THREAD_DEBUG (g_message("%s: No threads", __func__));
2400 mono_threads_unlock ();
2403 mono_threads_unlock ();
2406 mono_threads_lock ();
2407 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2408 mono_g_hash_table_foreach (threads, print_tids, NULL));
2410 ResetEvent (background_change_event);
2412 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2413 mono_threads_unlock ();
2415 /* Something to wait for */
2416 wait_for_tids_or_state_change (wait, INFINITE);
2418 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2419 } while(wait->num>0);
2421 mono_runtime_set_shutting_down ();
2423 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2424 mono_thread_pool_cleanup ();
2427 * Remove everything but the finalizer thread and self.
2428 * Also abort all the background threads
2431 mono_threads_lock ();
2434 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2436 mono_threads_unlock ();
2438 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2440 /* Something to wait for */
2441 wait_for_tids (wait, INFINITE);
2443 } while (wait->num > 0);
2446 * give the subthreads a chance to really quit (this is mainly needed
2447 * to get correct user and system times from getrusage/wait/time(1)).
2448 * This could be removed if we avoid pthread_detach() and use pthread_join().
2450 #ifndef PLATFORM_WIN32
2457 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2459 MonoThread *thread=(MonoThread *)value;
2461 if(thread->tid != (gsize)user) {
2462 /*TerminateThread (thread->handle, -1);*/
2466 void mono_thread_abort_all_other_threads (void)
2468 gsize self = GetCurrentThreadId ();
2470 mono_threads_lock ();
2471 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2472 mono_g_hash_table_size (threads));
2473 mono_g_hash_table_foreach (threads, print_tids, NULL));
2475 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2477 mono_threads_unlock ();
2481 collect_threads (gpointer key, gpointer value, gpointer user_data)
2483 MonoThread *thread = (MonoThread*)value;
2484 struct wait_data *wait = (struct wait_data*)user_data;
2487 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2488 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2492 wait->handles [wait->num] = handle;
2493 wait->threads [wait->num] = thread;
2499 * mono_thread_suspend_all_other_threads:
2501 * Suspend all managed threads except the finalizer thread and this thread.
2503 void mono_thread_suspend_all_other_threads (void)
2505 struct wait_data *wait = g_new0 (struct wait_data, 1);
2507 gsize self = GetCurrentThreadId ();
2509 guint32 eventidx = 0;
2512 * Make a copy of the hashtable since we can't do anything with
2513 * threads while threads_mutex is held.
2515 mono_threads_lock ();
2516 mono_g_hash_table_foreach (threads, collect_threads, wait);
2517 mono_threads_unlock ();
2519 events = g_new0 (gpointer, wait->num);
2521 /* Get the suspended events that we'll be waiting for */
2522 for (i = 0; i < wait->num; ++i) {
2523 MonoThread *thread = wait->threads [i];
2525 if ((thread->tid == self) || mono_gc_is_finalizer_thread (thread)) {
2526 //CloseHandle (wait->handles [i]);
2527 wait->threads [i] = NULL; /* ignore this thread in next loop */
2531 mono_monitor_enter (thread->synch_lock);
2533 if ((thread->state & ThreadState_Suspended) != 0 ||
2534 (thread->state & ThreadState_SuspendRequested) != 0 ||
2535 (thread->state & ThreadState_StopRequested) != 0 ||
2536 (thread->state & ThreadState_Stopped) != 0) {
2537 mono_monitor_exit (thread->synch_lock);
2538 CloseHandle (wait->handles [i]);
2539 wait->threads [i] = NULL; /* ignore this thread in next loop */
2543 /* Convert abort requests into suspend requests */
2544 if ((thread->state & ThreadState_AbortRequested) != 0)
2545 thread->state &= ~ThreadState_AbortRequested;
2547 thread->state |= ThreadState_SuspendRequested;
2549 if (thread->suspended_event == NULL) {
2550 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2551 if (thread->suspended_event == NULL) {
2552 /* Forget this one and go on to the next */
2553 mono_monitor_exit (thread->synch_lock);
2558 events [eventidx++] = thread->suspended_event;
2559 mono_monitor_exit (thread->synch_lock);
2561 /* Signal the thread to suspend */
2562 signal_thread_state_change (thread);
2565 WaitForMultipleObjectsEx (eventidx, events, TRUE, INFINITE, FALSE);
2566 for (i = 0; i < wait->num; ++i) {
2567 MonoThread *thread = wait->threads [i];
2572 mono_monitor_enter (thread->synch_lock);
2573 CloseHandle (thread->suspended_event);
2574 thread->suspended_event = NULL;
2575 mono_monitor_exit (thread->synch_lock);
2583 * mono_threads_request_thread_dump:
2585 * Ask all threads except the current to print their stacktrace to stdout.
2588 mono_threads_request_thread_dump (void)
2590 struct wait_data *wait = g_new0 (struct wait_data, 1);
2594 * Make a copy of the hashtable since we can't do anything with
2595 * threads while threads_mutex is held.
2597 mono_threads_lock ();
2598 mono_g_hash_table_foreach (threads, collect_threads, wait);
2599 mono_threads_unlock ();
2601 for (i = 0; i < wait->num; ++i) {
2602 MonoThread *thread = wait->threads [i];
2604 if (!mono_gc_is_finalizer_thread (thread) && (thread != mono_thread_current ()) && !thread->thread_dump_requested) {
2605 thread->thread_dump_requested = TRUE;
2607 signal_thread_state_change (thread);
2610 CloseHandle (wait->handles [i]);
2615 * mono_thread_push_appdomain_ref:
2617 * Register that the current thread may have references to objects in domain
2618 * @domain on its stack. Each call to this function should be paired with a
2619 * call to pop_appdomain_ref.
2622 mono_thread_push_appdomain_ref (MonoDomain *domain)
2624 MonoThread *thread = mono_thread_current ();
2627 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
2628 mono_threads_lock ();
2629 thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
2630 mono_threads_unlock ();
2635 mono_thread_pop_appdomain_ref (void)
2637 MonoThread *thread = mono_thread_current ();
2640 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
2641 mono_threads_lock ();
2642 /* FIXME: How can the list be empty ? */
2643 if (thread->appdomain_refs)
2644 thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
2645 mono_threads_unlock ();
2650 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
2653 mono_threads_lock ();
2654 res = g_slist_find (thread->appdomain_refs, domain) != NULL;
2655 mono_threads_unlock ();
2659 typedef struct abort_appdomain_data {
2660 struct wait_data wait;
2662 } abort_appdomain_data;
2665 abort_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
2667 MonoThread *thread = (MonoThread*)value;
2668 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
2669 MonoDomain *domain = data->domain;
2671 if (mono_thread_has_appdomain_ref (thread, domain)) {
2672 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
2674 ves_icall_System_Threading_Thread_Abort (thread, NULL);
2676 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
2677 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2680 data->wait.handles [data->wait.num] = handle;
2681 data->wait.threads [data->wait.num] = thread;
2684 /* Just ignore the rest, we can't do anything with
2692 * mono_threads_abort_appdomain_threads:
2694 * Abort threads which has references to the given appdomain.
2697 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
2699 abort_appdomain_data user_data;
2702 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
2704 start_time = GetTickCount ();
2706 mono_threads_lock ();
2708 user_data.domain = domain;
2709 user_data.wait.num = 0;
2710 mono_g_hash_table_foreach (threads, abort_appdomain_thread, &user_data);
2711 mono_threads_unlock ();
2713 if (user_data.wait.num > 0)
2715 * We should wait for the threads either to abort, or to leave the
2716 * domain. We can't do the latter, so we wait with a timeout.
2718 wait_for_tids (&user_data.wait, 100);
2720 /* Update remaining time */
2721 timeout -= GetTickCount () - start_time;
2722 start_time = GetTickCount ();
2727 while (user_data.wait.num > 0);
2729 THREAD_DEBUG (g_message ("%s: abort done", __func__));
2735 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
2737 MonoThread *thread = (MonoThread*)value;
2738 MonoDomain *domain = (MonoDomain*)user_data;
2741 /* No locking needed here */
2742 /* FIXME: why no locking? writes to the cache are protected with synch_lock above */
2744 if (thread->cached_culture_info) {
2745 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
2746 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
2747 if (obj && obj->vtable->domain == domain)
2748 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
2754 * mono_threads_clear_cached_culture:
2756 * Clear the cached_current_culture from all threads if it is in the
2760 mono_threads_clear_cached_culture (MonoDomain *domain)
2762 mono_threads_lock ();
2763 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
2764 mono_threads_unlock ();
2768 * mono_thread_get_pending_exception:
2770 * Return an exception which needs to be raised when leaving a catch clause.
2771 * This is used for undeniable exception propagation.
2774 mono_thread_get_pending_exception (void)
2776 MonoThread *thread = mono_thread_current ();
2778 MONO_ARCH_SAVE_REGS;
2780 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
2782 * FIXME: Clear the abort exception and return an AppDomainUnloaded
2783 * exception if the thread no longer references a dying appdomain.
2785 thread->abort_exc->trace_ips = NULL;
2786 thread->abort_exc->stack_trace = NULL;
2787 return thread->abort_exc;
2793 #define NUM_STATIC_DATA_IDX 8
2794 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
2795 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
2800 * mono_alloc_static_data
2802 * Allocate memory blocks for storing threads or context static data
2805 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset)
2807 guint idx = (offset >> 24) - 1;
2810 gpointer* static_data = *static_data_ptr;
2812 static_data = mono_gc_alloc_fixed (static_data_size [0], NULL);
2813 *static_data_ptr = static_data;
2814 static_data [0] = static_data;
2817 for (i = 1; i <= idx; ++i) {
2818 if (static_data [i])
2820 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
2825 * mono_init_static_data_info
2827 * Initializes static data counters
2829 static void mono_init_static_data_info (StaticDataInfo *static_data)
2831 static_data->idx = 0;
2832 static_data->offset = 0;
2833 static_data->freelist = NULL;
2837 * mono_alloc_static_data_slot
2839 * Generates an offset for static data. static_data contains the counters
2840 * used to generate it.
2843 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
2847 if (!static_data->idx && !static_data->offset) {
2849 * we use the first chunk of the first allocation also as
2850 * an array for the rest of the data
2852 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
2854 static_data->offset += align - 1;
2855 static_data->offset &= ~(align - 1);
2856 if (static_data->offset + size >= static_data_size [static_data->idx]) {
2857 static_data->idx ++;
2858 g_assert (size <= static_data_size [static_data->idx]);
2859 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
2860 static_data->offset = 0;
2862 offset = static_data->offset | ((static_data->idx + 1) << 24);
2863 static_data->offset += size;
2868 * ensure thread static fields already allocated are valid for thread
2869 * This function is called when a thread is created or on thread attach.
2872 thread_adjust_static_data (MonoThread *thread)
2876 mono_threads_lock ();
2877 if (thread_static_info.offset || thread_static_info.idx > 0) {
2878 /* get the current allocated size */
2879 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
2880 mono_alloc_static_data (&(thread->static_data), offset);
2882 mono_threads_unlock ();
2886 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
2888 MonoThread *thread = value;
2889 guint32 offset = GPOINTER_TO_UINT (user);
2891 mono_alloc_static_data (&(thread->static_data), offset);
2894 static MonoThreadDomainTls*
2895 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
2897 MonoThreadDomainTls* prev = NULL;
2898 MonoThreadDomainTls* tmp = static_data->freelist;
2900 if (tmp->size == size) {
2902 prev->next = tmp->next;
2904 static_data->freelist = tmp->next;
2913 * The offset for a special static variable is composed of three parts:
2914 * a bit that indicates the type of static data (0:thread, 1:context),
2915 * an index in the array of chunks of memory for the thread (thread->static_data)
2916 * and an offset in that chunk of mem. This allows allocating less memory in the
2921 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align)
2924 if (static_type == SPECIAL_STATIC_THREAD)
2926 MonoThreadDomainTls *item;
2927 mono_threads_lock ();
2928 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
2929 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
2931 offset = item->offset;
2934 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
2936 /* This can be called during startup */
2937 if (threads != NULL)
2938 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
2939 mono_threads_unlock ();
2943 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
2944 mono_contexts_lock ();
2945 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
2946 mono_contexts_unlock ();
2947 offset |= 0x80000000; /* Set the high bit to indicate context static data */
2953 mono_get_special_static_data (guint32 offset)
2955 /* The high bit means either thread (0) or static (1) data. */
2957 guint32 static_type = (offset & 0x80000000);
2960 offset &= 0x7fffffff;
2961 idx = (offset >> 24) - 1;
2963 if (static_type == 0)
2965 MonoThread *thread = mono_thread_current ();
2966 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
2970 /* Allocate static data block under demand, since we don't have a list
2973 MonoAppContext *context = mono_context_get ();
2974 if (!context->static_data || !context->static_data [idx]) {
2975 mono_contexts_lock ();
2976 mono_alloc_static_data (&(context->static_data), offset);
2977 mono_contexts_unlock ();
2979 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
2989 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
2991 MonoThread *thread = value;
2992 TlsOffsetSize *data = user;
2993 int idx = (data->offset >> 24) - 1;
2996 if (!thread->static_data || !thread->static_data [idx])
2998 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
2999 memset (ptr, 0, data->size);
3003 do_free_special (gpointer key, gpointer value, gpointer data)
3005 MonoClassField *field = key;
3006 guint32 offset = GPOINTER_TO_UINT (value);
3007 guint32 static_type = (offset & 0x80000000);
3010 size = mono_type_size (field->type, &align);
3011 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3012 if (static_type == 0) {
3014 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3015 data.offset = offset & 0x7fffffff;
3017 if (threads != NULL)
3018 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3019 item->offset = offset;
3021 item->next = thread_static_info.freelist;
3022 thread_static_info.freelist = item;
3024 /* FIXME: free context static data as well */
3029 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3031 mono_threads_lock ();
3032 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3033 mono_threads_unlock ();
3036 static MonoClassField *local_slots = NULL;
3039 /* local tls data to get locals_slot from a thread */
3042 /* index in the locals_slot array */
3047 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3049 LocalSlotID *sid = user_data;
3050 MonoThread *thread = (MonoThread*)value;
3051 MonoArray *slots_array;
3053 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3054 * it is for the right domain, so we need to check if it is allocated an initialized
3055 * for the current thread.
3057 /*g_print ("handling thread %p\n", thread);*/
3058 if (!thread->static_data || !thread->static_data [sid->idx])
3060 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3061 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3063 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3067 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3075 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3077 g_warning ("local_slots field not found in Thread class");
3081 domain = mono_domain_get ();
3082 mono_domain_lock (domain);
3083 if (domain->special_static_fields)
3084 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3085 mono_domain_unlock (domain);
3088 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3089 sid.offset = GPOINTER_TO_UINT (addr);
3090 sid.offset &= 0x7fffffff;
3091 sid.idx = (sid.offset >> 24) - 1;
3092 mono_threads_lock ();
3093 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3094 mono_threads_unlock ();
3096 /* FIXME: clear the slot for MonoAppContexts, too */
3100 #ifdef PLATFORM_WIN32
3101 static void CALLBACK dummy_apc (ULONG_PTR param)
3105 static guint32 dummy_apc (gpointer param)
3112 * mono_thread_execute_interruption
3114 * Performs the operation that the requested thread state requires (abort,
3117 static MonoException* mono_thread_execute_interruption (MonoThread *thread)
3119 mono_monitor_enter (thread->synch_lock);
3121 if (thread->interruption_requested) {
3122 /* this will consume pending APC calls */
3123 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
3124 InterlockedDecrement (&thread_interruption_requested);
3125 thread->interruption_requested = FALSE;
3128 if ((thread->state & ThreadState_AbortRequested) != 0) {
3129 if (thread->abort_exc == NULL)
3130 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
3131 mono_monitor_exit (thread->synch_lock);
3132 return thread->abort_exc;
3134 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
3135 thread->state &= ~ThreadState_SuspendRequested;
3136 thread->state |= ThreadState_Suspended;
3137 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3138 if (thread->suspend_event == NULL) {
3139 mono_monitor_exit (thread->synch_lock);
3142 if (thread->suspended_event)
3143 SetEvent (thread->suspended_event);
3144 mono_monitor_exit (thread->synch_lock);
3146 WaitForSingleObject (thread->suspend_event, INFINITE);
3148 mono_monitor_enter (thread->synch_lock);
3149 CloseHandle (thread->suspend_event);
3150 thread->suspend_event = NULL;
3151 thread->state &= ~ThreadState_Suspended;
3153 /* The thread that requested the resume will have replaced this event
3154 * and will be waiting for it
3156 SetEvent (thread->resume_event);
3157 mono_monitor_exit (thread->synch_lock);
3160 else if ((thread->state & ThreadState_StopRequested) != 0) {
3161 /* FIXME: do this through the JIT? */
3162 mono_monitor_exit (thread->synch_lock);
3163 mono_thread_exit ();
3165 } else if (thread->thread_interrupt_requested) {
3166 mono_monitor_exit (thread->synch_lock);
3167 return(mono_get_exception_thread_interrupted ());
3170 mono_monitor_exit (thread->synch_lock);
3175 * mono_thread_request_interruption
3177 * A signal handler can call this method to request the interruption of a
3178 * thread. The result of the interruption will depend on the current state of
3179 * the thread. If the result is an exception that needs to be throw, it is
3180 * provided as return value.
3182 MonoException* mono_thread_request_interruption (gboolean running_managed)
3184 MonoThread *thread = mono_thread_current ();
3186 /* The thread may already be stopping */
3190 mono_monitor_enter (thread->synch_lock);
3192 if (thread->interruption_requested) {
3193 mono_monitor_exit (thread->synch_lock);
3197 if (!running_managed || is_running_protected_wrapper ()) {
3198 /* Can't stop while in unmanaged code. Increase the global interruption
3199 request count. When exiting the unmanaged method the count will be
3200 checked and the thread will be interrupted. */
3202 InterlockedIncrement (&thread_interruption_requested);
3203 thread->interruption_requested = TRUE;
3204 mono_monitor_exit (thread->synch_lock);
3206 /* this will awake the thread if it is in WaitForSingleObject
3208 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
3212 mono_monitor_exit (thread->synch_lock);
3213 return mono_thread_execute_interruption (thread);
3217 gboolean mono_thread_interruption_requested ()
3219 if (thread_interruption_requested) {
3220 MonoThread *thread = mono_thread_current ();
3221 /* The thread may already be stopping */
3223 return (thread->interruption_requested);
3228 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
3230 MonoThread *thread = mono_thread_current ();
3232 /* The thread may already be stopping */
3236 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
3237 MonoException* exc = mono_thread_execute_interruption (thread);
3238 if (exc) mono_raise_exception (exc);
3243 * Performs the interruption of the current thread, if one has been requested,
3244 * and the thread is not running a protected wrapper.
3246 void mono_thread_interruption_checkpoint ()
3248 mono_thread_interruption_checkpoint_request (FALSE);
3252 * Performs the interruption of the current thread, if one has been requested.
3254 void mono_thread_force_interruption_checkpoint ()
3256 mono_thread_interruption_checkpoint_request (TRUE);
3260 * mono_thread_interruption_request_flag:
3262 * Returns the address of a flag that will be non-zero if an interruption has
3263 * been requested for a thread. The thread to interrupt may not be the current
3264 * thread, so an additional call to mono_thread_interruption_requested() or
3265 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
3268 gint32* mono_thread_interruption_request_flag ()
3270 return &thread_interruption_requested;
3274 mono_thread_init_apartment_state (void)
3277 thread = mono_thread_current ();
3279 #ifdef PLATFORM_WIN32
3280 /* Positive return value indicates success, either
3281 * S_OK if this is first CoInitialize call, or
3282 * S_FALSE if CoInitialize already called, but with same
3283 * threading model. A negative value indicates failure,
3284 * probably due to trying to change the threading model.
3286 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
3287 ? COINIT_APARTMENTTHREADED
3288 : COINIT_MULTITHREADED) < 0) {
3289 thread->apartment_state = ThreadApartmentState_Unknown;
3295 mono_thread_cleanup_apartment_state (void)
3297 #ifdef PLATFORM_WIN32
3299 thread = mono_thread_current ();
3301 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {