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 /* Maps a MonoThread to its start argument */
131 /* Protected by mono_threads_lock () */
132 static MonoGHashTable *thread_start_args = NULL;
134 /* The TLS key that holds the MonoObject assigned to each thread */
135 static guint32 current_object_key = -1;
137 #ifdef HAVE_KW_THREAD
138 /* we need to use both the Tls* functions and __thread because
139 * the gc needs to see all the threads
141 static __thread MonoThread * tls_current_object MONO_TLS_FAST;
142 #define SET_CURRENT_OBJECT(x) do { \
143 tls_current_object = x; \
144 TlsSetValue (current_object_key, x); \
146 #define GET_CURRENT_OBJECT() tls_current_object
148 #define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x)
149 #define GET_CURRENT_OBJECT() (MonoThread*) TlsGetValue (current_object_key)
152 /* function called at thread start */
153 static MonoThreadStartCB mono_thread_start_cb = NULL;
155 /* function called at thread attach */
156 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
158 /* function called at thread cleanup */
159 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
161 /* function called to notify the runtime about a pending exception on the current thread */
162 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
164 /* The default stack size for each thread */
165 static guint32 default_stacksize = 0;
166 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
168 static void thread_adjust_static_data (MonoThread *thread);
169 static void mono_init_static_data_info (StaticDataInfo *static_data);
170 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
171 static gboolean mono_thread_resume (MonoThread* thread);
172 static void mono_thread_start (MonoThread *thread);
173 static void signal_thread_state_change (MonoThread *thread);
175 static MonoException* mono_thread_execute_interruption (MonoThread *thread);
177 /* Spin lock for InterlockedXXX 64 bit functions */
178 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
179 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
180 static CRITICAL_SECTION interlocked_mutex;
182 /* global count of thread interruptions requested */
183 static gint32 thread_interruption_requested = 0;
185 /* Event signaled when a thread changes its background mode */
186 static HANDLE background_change_event;
188 /* The table for small ID assignment */
189 static CRITICAL_SECTION small_id_mutex;
190 static int small_id_table_size = 0;
191 static int small_id_next = 0;
192 static int highest_small_id = -1;
193 static MonoThread **small_id_table = NULL;
195 /* The hazard table */
196 #define HAZARD_TABLE_MAX_SIZE 16384 /* There cannot be more threads than this number. */
197 static volatile int hazard_table_size = 0;
198 static MonoThreadHazardPointers * volatile hazard_table = NULL;
200 /* The table where we keep pointers to blocks to be freed but that
201 have to wait because they're guarded by a hazard pointer. */
202 static CRITICAL_SECTION delayed_free_table_mutex;
203 static GArray *delayed_free_table = NULL;
205 static gboolean shutting_down = FALSE;
208 mono_thread_get_tls_key (void)
210 return current_object_key;
214 mono_thread_get_tls_offset (void)
217 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
221 /* handle_store() and handle_remove() manage the array of threads that
222 * still need to be waited for when the main thread exits.
224 * If handle_store() returns FALSE the thread must not be started
225 * because Mono is shutting down.
227 static gboolean handle_store(MonoThread *thread)
229 mono_threads_lock ();
231 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->tid));
233 if (threads_starting_up)
234 mono_g_hash_table_remove (threads_starting_up, thread);
237 mono_threads_unlock ();
242 MONO_GC_REGISTER_ROOT (threads);
243 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
246 /* We don't need to duplicate thread->handle, because it is
247 * only closed when the thread object is finalized by the GC.
249 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->tid),
252 mono_threads_unlock ();
257 static gboolean handle_remove(MonoThread *thread)
260 gsize tid = thread->tid;
262 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
264 mono_threads_lock ();
267 /* We have to check whether the thread object for the
268 * tid is still the same in the table because the
269 * thread might have been destroyed and the tid reused
270 * in the meantime, in which case the tid would be in
271 * the table, but with another thread object.
273 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
274 mono_g_hash_table_remove (threads, (gpointer)tid);
283 mono_threads_unlock ();
285 /* Don't close the handle here, wait for the object finalizer
286 * to do it. Otherwise, the following race condition applies:
288 * 1) Thread exits (and handle_remove() closes the handle)
290 * 2) Some other handle is reassigned the same slot
292 * 3) Another thread tries to join the first thread, and
293 * blocks waiting for the reassigned handle to be signalled
294 * (which might never happen). This is possible, because the
295 * thread calling Join() still has a reference to the first
302 * Allocate a small thread id.
304 * FIXME: The biggest part of this function is very similar to
305 * domain_id_alloc() in domain.c and should be merged.
308 small_id_alloc (MonoThread *thread)
312 EnterCriticalSection (&small_id_mutex);
314 if (!small_id_table) {
315 small_id_table_size = 2;
316 small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoThread*), NULL);
318 for (i = small_id_next; i < small_id_table_size; ++i) {
319 if (!small_id_table [i]) {
325 for (i = 0; i < small_id_next; ++i) {
326 if (!small_id_table [i]) {
333 MonoThread **new_table;
334 int new_size = small_id_table_size * 2;
335 if (new_size >= (1 << 16))
336 g_assert_not_reached ();
337 id = small_id_table_size;
338 new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoThread*), NULL);
339 memcpy (new_table, small_id_table, small_id_table_size * sizeof (void*));
340 mono_gc_free_fixed (small_id_table);
341 small_id_table = new_table;
342 small_id_table_size = new_size;
344 thread->small_id = id;
345 g_assert (small_id_table [id] == NULL);
346 small_id_table [id] = thread;
348 if (small_id_next > small_id_table_size)
351 if (id >= hazard_table_size) {
353 int pagesize = mono_pagesize ();
354 int num_pages = (hazard_table_size * sizeof (MonoThreadHazardPointers) + pagesize - 1) / pagesize;
356 if (hazard_table == NULL) {
357 hazard_table = mono_valloc (NULL,
358 sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE,
362 g_assert (hazard_table != NULL);
363 page_addr = (guint8*)hazard_table + num_pages * pagesize;
365 g_assert (id < HAZARD_TABLE_MAX_SIZE);
367 mono_mprotect (page_addr, pagesize, MONO_MMAP_READ | MONO_MMAP_WRITE);
370 hazard_table_size = num_pages * pagesize / sizeof (MonoThreadHazardPointers);
372 g_assert (id < hazard_table_size);
374 hazard_table [id].hazard_pointers [0] = NULL;
375 hazard_table [id].hazard_pointers [1] = NULL;
378 if (id > highest_small_id) {
379 highest_small_id = id;
380 mono_memory_write_barrier ();
383 LeaveCriticalSection (&small_id_mutex);
389 small_id_free (int id)
391 g_assert (id >= 0 && id < small_id_table_size);
392 g_assert (small_id_table [id] != NULL);
394 small_id_table [id] = NULL;
398 is_pointer_hazardous (gpointer p)
401 int highest = highest_small_id;
403 g_assert (highest < hazard_table_size);
405 for (i = 0; i <= highest; ++i) {
406 if (hazard_table [i].hazard_pointers [0] == p
407 || hazard_table [i].hazard_pointers [1] == p)
414 MonoThreadHazardPointers*
415 mono_hazard_pointer_get (void)
417 MonoThread *current_thread = mono_thread_current ();
419 if (!(current_thread && current_thread->small_id >= 0)) {
420 static MonoThreadHazardPointers emerg_hazard_table;
421 g_warning ("Thread %p may have been prematurely finalized", current_thread);
422 return &emerg_hazard_table;
425 return &hazard_table [current_thread->small_id];
429 try_free_delayed_free_item (int index)
431 if (delayed_free_table->len > index) {
432 DelayedFreeItem item = { NULL, NULL };
434 EnterCriticalSection (&delayed_free_table_mutex);
435 /* We have to check the length again because another
436 thread might have freed an item before we acquired
438 if (delayed_free_table->len > index) {
439 item = g_array_index (delayed_free_table, DelayedFreeItem, index);
441 if (!is_pointer_hazardous (item.p))
442 g_array_remove_index_fast (delayed_free_table, index);
446 LeaveCriticalSection (&delayed_free_table_mutex);
449 item.free_func (item.p);
454 mono_thread_hazardous_free_or_queue (gpointer p, MonoHazardousFreeFunc free_func)
458 /* First try to free a few entries in the delayed free
460 for (i = 2; i >= 0; --i)
461 try_free_delayed_free_item (i);
463 /* Now see if the pointer we're freeing is hazardous. If it
464 isn't, free it. Otherwise put it in the delay list. */
465 if (is_pointer_hazardous (p)) {
466 DelayedFreeItem item = { p, free_func };
468 ++mono_stats.hazardous_pointer_count;
470 EnterCriticalSection (&delayed_free_table_mutex);
471 g_array_append_val (delayed_free_table, item);
472 LeaveCriticalSection (&delayed_free_table_mutex);
478 mono_thread_hazardous_try_free_all (void)
483 if (!delayed_free_table)
486 len = delayed_free_table->len;
488 for (i = len - 1; i >= 0; --i)
489 try_free_delayed_free_item (i);
492 static void ensure_synch_cs_set (MonoThread *thread)
494 CRITICAL_SECTION *synch_cs;
496 if (thread->synch_cs != NULL) {
500 synch_cs = g_new0 (CRITICAL_SECTION, 1);
501 InitializeCriticalSection (synch_cs);
503 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
504 synch_cs, NULL) != NULL) {
505 /* Another thread must have installed this CS */
506 DeleteCriticalSection (synch_cs);
512 * NOTE: this function can be called also for threads different from the current one:
513 * make sure no code called from it will ever assume it is run on the thread that is
514 * getting cleaned up.
516 static void thread_cleanup (MonoThread *thread)
518 g_assert (thread != NULL);
520 if (thread->abort_state_handle) {
521 g_assert (thread->abort_exc);
522 mono_gchandle_free (thread->abort_state_handle);
523 thread->abort_state_handle = 0;
525 thread->abort_exc = NULL;
526 thread->current_appcontext = NULL;
529 * This is necessary because otherwise we might have
530 * cross-domain references which will not get cleaned up when
531 * the target domain is unloaded.
533 if (thread->cached_culture_info) {
535 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
536 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
539 /* if the thread is not in the hash it has been removed already */
540 if (!handle_remove (thread))
542 mono_release_type_locks (thread);
544 EnterCriticalSection (thread->synch_cs);
546 thread->state |= ThreadState_Stopped;
547 thread->state &= ~ThreadState_Background;
549 LeaveCriticalSection (thread->synch_cs);
551 mono_profiler_thread_end (thread->tid);
553 if (thread == mono_thread_current ())
554 mono_thread_pop_appdomain_ref ();
556 if (thread->serialized_culture_info)
557 g_free (thread->serialized_culture_info);
559 if (thread->serialized_ui_culture_info)
560 g_free (thread->serialized_ui_culture_info);
562 g_free (thread->name);
564 thread->cached_culture_info = NULL;
566 mono_gc_free_fixed (thread->static_data);
567 thread->static_data = NULL;
569 if (mono_thread_cleanup_fn)
570 mono_thread_cleanup_fn (thread);
572 small_id_free (thread->small_id);
573 thread->small_id = -2;
576 static guint32 WINAPI start_wrapper(void *data)
578 struct StartInfo *start_info=(struct StartInfo *)data;
579 guint32 (*start_func)(void *);
582 MonoThread *thread=start_info->obj;
583 MonoObject *start_delegate = start_info->delegate;
585 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
587 /* We can be sure start_info->obj->tid and
588 * start_info->obj->handle have been set, because the thread
589 * was created suspended, and these values were set before the
595 SET_CURRENT_OBJECT (thread);
597 mono_monitor_init_tls ();
599 /* Every thread references the appdomain which created it */
600 mono_thread_push_appdomain_ref (start_info->domain);
602 if (!mono_domain_set (start_info->domain, FALSE)) {
603 /* No point in raising an appdomain_unloaded exception here */
604 /* FIXME: Cleanup here */
605 mono_thread_pop_appdomain_ref ();
609 start_func = start_info->func;
610 start_arg = start_info->start_arg;
612 /* This MUST be called before any managed code can be
613 * executed, as it calls the callback function that (for the
614 * jit) sets the lmf marker.
616 mono_thread_new_init (tid, &tid, start_func);
617 thread->stack_ptr = &tid;
619 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
621 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
623 mono_profiler_thread_start (tid);
625 /* On 2.0 profile (and higher), set explicitly since state might have been
627 if (mono_framework_version () != 1) {
628 if (thread->apartment_state == ThreadApartmentState_Unknown)
629 thread->apartment_state = ThreadApartmentState_MTA;
632 mono_thread_init_apartment_state ();
634 if(thread->start_notify!=NULL) {
635 /* Let the thread that called Start() know we're
638 ReleaseSemaphore (thread->start_notify, 1, NULL);
641 mono_threads_lock ();
642 mono_g_hash_table_remove (thread_start_args, thread);
643 mono_threads_unlock ();
647 thread_adjust_static_data (thread);
649 g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
653 mono_thread_set_execution_context (thread->ec_to_set);
655 /* start_func is set only for unmanaged start functions */
657 start_func (start_arg);
660 g_assert (start_delegate != NULL);
661 args [0] = start_arg;
662 /* we may want to handle the exception here. See comment below on unhandled exceptions */
663 mono_runtime_delegate_invoke (start_delegate, args, NULL);
666 /* If the thread calls ExitThread at all, this remaining code
667 * will not be executed, but the main thread will eventually
668 * call thread_cleanup() on this thread's behalf.
671 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
673 thread_cleanup (thread);
675 /* Do any cleanup needed for apartment state. This
676 * cannot be done in thread_cleanup since thread_cleanup could be
677 * called for a thread other than the current thread.
678 * mono_thread_cleanup_apartment_state cleans up apartment
679 * for the current thead */
680 mono_thread_cleanup_apartment_state ();
682 /* Remove the reference to the thread object in the TLS data,
683 * so the thread object can be finalized. This won't be
684 * reached if the thread threw an uncaught exception, so those
685 * thread handles will stay referenced :-( (This is due to
686 * missing support for scanning thread-specific data in the
687 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
690 SET_CURRENT_OBJECT (NULL);
695 void mono_thread_new_init (gsize tid, gpointer stack_start, gpointer func)
697 if (mono_thread_start_cb) {
698 mono_thread_start_cb (tid, stack_start, func);
702 void mono_threads_set_default_stacksize (guint32 stacksize)
704 default_stacksize = stacksize;
707 guint32 mono_threads_get_default_stacksize (void)
709 return default_stacksize;
713 * mono_create_thread:
715 * This is a wrapper around CreateThread which handles differences in the type of
716 * the the 'tid' argument.
718 gpointer mono_create_thread (WapiSecurityAttributes *security,
719 guint32 stacksize, WapiThreadStart start,
720 gpointer param, guint32 create, gsize *tid)
724 #ifdef PLATFORM_WIN32
727 res = CreateThread (security, stacksize, start, param, create, &real_tid);
731 res = CreateThread (security, stacksize, start, param, create, tid);
737 MonoThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread)
740 HANDLE thread_handle;
741 struct StartInfo *start_info;
744 thread=(MonoThread *)mono_object_new (domain,
745 mono_defaults.thread_class);
747 start_info=g_new0 (struct StartInfo, 1);
748 start_info->func = func;
749 start_info->obj = thread;
750 start_info->domain = domain;
751 start_info->start_arg = arg;
753 mono_threads_lock ();
755 mono_threads_unlock ();
759 if (threads_starting_up == NULL) {
760 MONO_GC_REGISTER_ROOT (threads_starting_up);
761 threads_starting_up = mono_g_hash_table_new (NULL, NULL);
763 if (thread_start_args == NULL) {
764 MONO_GC_REGISTER_ROOT (thread_start_args);
765 thread_start_args = mono_g_hash_table_new (NULL, NULL);
767 mono_g_hash_table_insert (threads_starting_up, thread, thread);
769 * The argument may be an object reference, and there is no ref to keep it alive
770 * when the new thread is started but not yet registered with the collector. So
771 * we store it in a GC tracked hash table.
773 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
774 mono_threads_unlock ();
776 /* Create suspended, so we can do some housekeeping before the thread
779 thread_handle = mono_create_thread (NULL, default_stacksize_for_thread (thread), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
780 CREATE_SUSPENDED, &tid);
781 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
782 if (thread_handle == NULL) {
783 /* The thread couldn't be created, so throw an exception */
784 mono_threads_lock ();
785 mono_g_hash_table_remove (threads_starting_up, thread);
786 mono_threads_unlock ();
788 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
792 thread->handle=thread_handle;
794 thread->apartment_state=ThreadApartmentState_Unknown;
795 small_id_alloc (thread);
797 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
798 InitializeCriticalSection (thread->synch_cs);
800 thread->threadpool_thread = threadpool_thread;
801 if (threadpool_thread)
802 mono_thread_set_state (thread, ThreadState_Background);
804 if (handle_store (thread))
805 ResumeThread (thread_handle);
811 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
813 mono_thread_create_internal (domain, func, arg, FALSE);
817 * mono_thread_get_stack_bounds:
819 * Return the address and size of the current threads stack. Return NULL as the
820 * stack address if the stack address cannot be determined.
823 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
825 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
826 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
827 *stsize = pthread_get_stacksize_np (pthread_self ());
828 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
830 /* FIXME: simplify the mess below */
831 #elif !defined(PLATFORM_WIN32)
833 guint8 *current = (guint8*)&attr;
835 pthread_attr_init (&attr);
836 # ifdef HAVE_PTHREAD_GETATTR_NP
837 pthread_getattr_np (pthread_self(), &attr);
839 # ifdef HAVE_PTHREAD_ATTR_GET_NP
840 pthread_attr_get_np (pthread_self(), &attr);
843 pthread_attr_getstacksize (&attr, &stsize);
852 pthread_attr_getstack (&attr, (void**)staddr, stsize);
854 g_assert ((current > *staddr) && (current < *staddr + *stsize));
857 pthread_attr_destroy (&attr);
860 /* When running under emacs, sometimes staddr is not aligned to a page size */
861 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
865 mono_thread_attach (MonoDomain *domain)
868 HANDLE thread_handle;
871 if ((thread = mono_thread_current ())) {
872 if (domain != mono_domain_get ())
873 mono_domain_set (domain, TRUE);
874 /* Already attached */
878 if (!mono_gc_register_thread (&domain)) {
879 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 ());
882 thread = (MonoThread *)mono_object_new (domain,
883 mono_defaults.thread_class);
885 thread_handle = GetCurrentThread ();
886 g_assert (thread_handle);
888 tid=GetCurrentThreadId ();
891 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
892 * refer to the thread from other threads for things like aborting.
894 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
895 THREAD_ALL_ACCESS, TRUE, 0);
897 thread->handle=thread_handle;
899 thread->apartment_state=ThreadApartmentState_Unknown;
900 small_id_alloc (thread);
901 thread->stack_ptr = &tid;
903 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
904 InitializeCriticalSection (thread->synch_cs);
906 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
908 if (!handle_store (thread)) {
909 /* Mono is shutting down, so just wait for the end */
914 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
916 SET_CURRENT_OBJECT (thread);
917 mono_domain_set (domain, TRUE);
919 mono_monitor_init_tls ();
921 thread_adjust_static_data (thread);
923 if (mono_thread_attach_cb) {
927 mono_thread_get_stack_bounds (&staddr, &stsize);
930 mono_thread_attach_cb (tid, &tid);
932 mono_thread_attach_cb (tid, staddr + stsize);
939 mono_thread_detach (MonoThread *thread)
941 g_return_if_fail (thread != NULL);
943 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
945 thread_cleanup (thread);
947 SET_CURRENT_OBJECT (NULL);
949 /* Don't need to CloseHandle this thread, even though we took a
950 * reference in mono_thread_attach (), because the GC will do it
951 * when the Thread object is finalised.
958 MonoThread *thread = mono_thread_current ();
960 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
962 thread_cleanup (thread);
963 SET_CURRENT_OBJECT (NULL);
965 /* we could add a callback here for embedders to use. */
966 if (thread == mono_thread_get_main ())
967 exit (mono_environment_exitcode_get ());
971 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
974 guint32 (*start_func)(void *);
975 struct StartInfo *start_info;
981 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
983 ensure_synch_cs_set (this);
985 EnterCriticalSection (this->synch_cs);
987 if ((this->state & ThreadState_Unstarted) == 0) {
988 LeaveCriticalSection (this->synch_cs);
989 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
995 if ((this->state & ThreadState_Aborted) != 0) {
996 LeaveCriticalSection (this->synch_cs);
1001 /* This is freed in start_wrapper */
1002 start_info = g_new0 (struct StartInfo, 1);
1003 start_info->func = start_func;
1004 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1005 start_info->delegate = start;
1006 start_info->obj = this;
1007 start_info->domain = mono_domain_get ();
1009 this->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1010 if(this->start_notify==NULL) {
1011 LeaveCriticalSection (this->synch_cs);
1012 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1013 g_free (start_info);
1017 mono_threads_lock ();
1018 if (threads_starting_up == NULL) {
1019 MONO_GC_REGISTER_ROOT (threads_starting_up);
1020 threads_starting_up = mono_g_hash_table_new (NULL, NULL);
1022 mono_g_hash_table_insert (threads_starting_up, this, this);
1023 mono_threads_unlock ();
1025 thread=mono_create_thread(NULL, default_stacksize_for_thread (this), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1026 CREATE_SUSPENDED, &tid);
1028 LeaveCriticalSection (this->synch_cs);
1029 mono_threads_lock ();
1030 mono_g_hash_table_remove (threads_starting_up, this);
1031 mono_threads_unlock ();
1032 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1036 this->handle=thread;
1038 small_id_alloc (this);
1040 /* Don't call handle_store() here, delay it to Start.
1041 * We can't join a thread (trying to will just block
1042 * forever) until it actually starts running, so don't
1043 * store the handle till then.
1046 mono_thread_start (this);
1048 this->state &= ~ThreadState_Unstarted;
1050 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1052 LeaveCriticalSection (this->synch_cs);
1057 void ves_icall_System_Threading_Thread_Thread_init (MonoThread *this)
1059 MONO_ARCH_SAVE_REGS;
1061 ensure_synch_cs_set (this);
1064 void ves_icall_System_Threading_Thread_Thread_free_internal (MonoThread *this,
1067 MONO_ARCH_SAVE_REGS;
1069 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1072 CloseHandle (thread);
1074 if (this->synch_cs) {
1075 DeleteCriticalSection (this->synch_cs);
1076 g_free (this->synch_cs);
1077 this->synch_cs = NULL;
1080 g_assert (!this->abort_exc && !this->abort_state_handle);
1083 static void mono_thread_start (MonoThread *thread)
1085 MONO_ARCH_SAVE_REGS;
1087 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1089 /* Only store the handle when the thread is about to be
1090 * launched, to avoid the main thread deadlocking while trying
1091 * to clean up a thread that will never be signalled.
1093 if (!handle_store (thread))
1096 ResumeThread (thread->handle);
1098 if(thread->start_notify!=NULL) {
1099 /* Wait for the thread to set up its TLS data etc, so
1100 * theres no potential race condition if someone tries
1101 * to look up the data believing the thread has
1105 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1107 WaitForSingleObjectEx (thread->start_notify, INFINITE, FALSE);
1108 CloseHandle (thread->start_notify);
1109 thread->start_notify = NULL;
1112 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1115 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1118 MonoThread *thread = mono_thread_current ();
1120 MONO_ARCH_SAVE_REGS;
1122 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1124 mono_thread_current_check_pending_interrupt ();
1126 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1128 res = SleepEx(ms,TRUE);
1130 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1132 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1133 MonoException* exc = mono_thread_execute_interruption (thread);
1134 if (exc) mono_raise_exception (exc);
1138 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1143 ves_icall_System_Threading_Thread_GetDomainID (void)
1145 MONO_ARCH_SAVE_REGS;
1147 return mono_domain_get()->domain_id;
1151 ves_icall_System_Threading_Thread_GetName_internal (MonoThread *this_obj)
1155 ensure_synch_cs_set (this_obj);
1157 EnterCriticalSection (this_obj->synch_cs);
1159 if (!this_obj->name)
1162 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1164 LeaveCriticalSection (this_obj->synch_cs);
1170 ves_icall_System_Threading_Thread_SetName_internal (MonoThread *this_obj, MonoString *name)
1172 ensure_synch_cs_set (this_obj);
1174 EnterCriticalSection (this_obj->synch_cs);
1176 if (this_obj->name) {
1177 LeaveCriticalSection (this_obj->synch_cs);
1179 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1183 this_obj->name = g_new (gunichar2, mono_string_length (name));
1184 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1185 this_obj->name_len = mono_string_length (name);
1188 this_obj->name = NULL;
1190 LeaveCriticalSection (this_obj->synch_cs);
1194 lookup_cached_culture (MonoThread *this, MonoDomain *domain, int start_idx)
1199 if (this->cached_culture_info) {
1200 domain = mono_domain_get ();
1201 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1202 res = mono_array_get (this->cached_culture_info, MonoObject*, i);
1203 if (res && res->vtable->domain == domain)
1212 ves_icall_System_Threading_Thread_GetCachedCurrentCulture (MonoThread *this)
1214 return lookup_cached_culture (this, mono_domain_get (), CULTURES_START_IDX);
1218 ves_icall_System_Threading_Thread_GetSerializedCurrentCulture (MonoThread *this)
1222 ensure_synch_cs_set (this);
1224 EnterCriticalSection (this->synch_cs);
1226 if (this->serialized_culture_info) {
1227 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_culture_info_len);
1228 memcpy (mono_array_addr (res, guint8, 0), this->serialized_culture_info, this->serialized_culture_info_len);
1233 LeaveCriticalSection (this->synch_cs);
1239 cache_culture (MonoThread *this, MonoObject *culture, int start_idx)
1242 MonoDomain *domain = mono_domain_get ();
1245 int same_domain_slot = -1;
1247 ensure_synch_cs_set (this);
1249 EnterCriticalSection (this->synch_cs);
1251 if (!this->cached_culture_info)
1252 MONO_OBJECT_SETREF (this, cached_culture_info, mono_array_new_cached (mono_object_domain (this), mono_defaults.object_class, NUM_CACHED_CULTURES * 2));
1254 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1255 obj = mono_array_get (this->cached_culture_info, MonoObject*, i);
1259 /* we continue, because there may be a slot used with the same domain */
1263 if (obj->vtable->domain == domain) {
1264 same_domain_slot = i;
1268 if (same_domain_slot >= 0)
1269 mono_array_setref (this->cached_culture_info, same_domain_slot, culture);
1270 else if (free_slot >= 0)
1271 mono_array_setref (this->cached_culture_info, free_slot, culture);
1272 /* we may want to replace an existing entry here, even when no suitable slot is found */
1274 LeaveCriticalSection (this->synch_cs);
1278 ves_icall_System_Threading_Thread_SetCachedCurrentCulture (MonoThread *this, MonoObject *culture)
1280 cache_culture (this, culture, CULTURES_START_IDX);
1284 ves_icall_System_Threading_Thread_SetSerializedCurrentCulture (MonoThread *this, MonoArray *arr)
1286 ensure_synch_cs_set (this);
1288 EnterCriticalSection (this->synch_cs);
1290 if (this->serialized_culture_info)
1291 g_free (this->serialized_culture_info);
1292 this->serialized_culture_info = g_new0 (guint8, mono_array_length (arr));
1293 this->serialized_culture_info_len = mono_array_length (arr);
1294 memcpy (this->serialized_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1296 LeaveCriticalSection (this->synch_cs);
1301 ves_icall_System_Threading_Thread_GetCachedCurrentUICulture (MonoThread *this)
1303 return lookup_cached_culture (this, mono_domain_get (), UICULTURES_START_IDX);
1307 ves_icall_System_Threading_Thread_GetSerializedCurrentUICulture (MonoThread *this)
1311 ensure_synch_cs_set (this);
1313 EnterCriticalSection (this->synch_cs);
1315 if (this->serialized_ui_culture_info) {
1316 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_ui_culture_info_len);
1317 memcpy (mono_array_addr (res, guint8, 0), this->serialized_ui_culture_info, this->serialized_ui_culture_info_len);
1322 LeaveCriticalSection (this->synch_cs);
1328 ves_icall_System_Threading_Thread_SetCachedCurrentUICulture (MonoThread *this, MonoObject *culture)
1330 cache_culture (this, culture, UICULTURES_START_IDX);
1334 ves_icall_System_Threading_Thread_SetSerializedCurrentUICulture (MonoThread *this, MonoArray *arr)
1336 ensure_synch_cs_set (this);
1338 EnterCriticalSection (this->synch_cs);
1340 if (this->serialized_ui_culture_info)
1341 g_free (this->serialized_ui_culture_info);
1342 this->serialized_ui_culture_info = g_new0 (guint8, mono_array_length (arr));
1343 this->serialized_ui_culture_info_len = mono_array_length (arr);
1344 memcpy (this->serialized_ui_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1346 LeaveCriticalSection (this->synch_cs);
1349 /* the jit may read the compiled code of this function */
1351 mono_thread_current (void)
1353 MonoThread *res = GET_CURRENT_OBJECT ();
1354 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1358 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoThread *this,
1359 int ms, HANDLE thread)
1361 MonoThread *cur_thread = mono_thread_current ();
1364 MONO_ARCH_SAVE_REGS;
1366 mono_thread_current_check_pending_interrupt ();
1368 ensure_synch_cs_set (this);
1370 EnterCriticalSection (this->synch_cs);
1372 if ((this->state & ThreadState_Unstarted) != 0) {
1373 LeaveCriticalSection (this->synch_cs);
1375 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1379 LeaveCriticalSection (this->synch_cs);
1384 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1386 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1388 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1390 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1392 if(ret==WAIT_OBJECT_0) {
1393 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1398 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1403 /* FIXME: exitContext isnt documented */
1404 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1410 MonoObject *waitHandle;
1411 MonoThread *thread = mono_thread_current ();
1413 MONO_ARCH_SAVE_REGS;
1415 /* Do this WaitSleepJoin check before creating objects */
1416 mono_thread_current_check_pending_interrupt ();
1418 numhandles = mono_array_length(mono_handles);
1419 handles = g_new0(HANDLE, numhandles);
1421 for(i = 0; i < numhandles; i++) {
1422 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1423 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1430 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1432 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1434 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1438 if(ret==WAIT_FAILED) {
1439 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1441 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1442 /* Do we want to try again if we get
1443 * WAIT_IO_COMPLETION? The documentation for
1444 * WaitHandle doesn't give any clues. (We'd have to
1445 * fiddle with the timeout if we retry.)
1447 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1454 /* FIXME: exitContext isnt documented */
1455 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1461 MonoObject *waitHandle;
1462 MonoThread *thread = mono_thread_current ();
1464 MONO_ARCH_SAVE_REGS;
1466 /* Do this WaitSleepJoin check before creating objects */
1467 mono_thread_current_check_pending_interrupt ();
1469 numhandles = mono_array_length(mono_handles);
1470 handles = g_new0(HANDLE, numhandles);
1472 for(i = 0; i < numhandles; i++) {
1473 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1474 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1481 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1483 ret=WaitForMultipleObjectsEx(numhandles, handles, FALSE, ms, TRUE);
1485 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1489 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1492 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1494 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1495 return ret - WAIT_OBJECT_0;
1497 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1498 return ret - WAIT_ABANDONED_0;
1505 /* FIXME: exitContext isnt documented */
1506 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1509 MonoThread *thread = mono_thread_current ();
1511 MONO_ARCH_SAVE_REGS;
1513 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1519 mono_thread_current_check_pending_interrupt ();
1521 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1523 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1525 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1527 if(ret==WAIT_FAILED) {
1528 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1530 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1531 /* Do we want to try again if we get
1532 * WAIT_IO_COMPLETION? The documentation for
1533 * WaitHandle doesn't give any clues. (We'd have to
1534 * fiddle with the timeout if we retry.)
1536 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1544 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1547 MonoThread *thread = mono_thread_current ();
1549 MONO_ARCH_SAVE_REGS;
1554 mono_thread_current_check_pending_interrupt ();
1556 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1558 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1560 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1562 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1565 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1569 MONO_ARCH_SAVE_REGS;
1574 mutex = CreateMutex (NULL, owned, NULL);
1576 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1578 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1586 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1587 MONO_ARCH_SAVE_REGS;
1589 return(ReleaseMutex (handle));
1592 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1598 MONO_ARCH_SAVE_REGS;
1600 *error = ERROR_SUCCESS;
1602 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1604 *error = GetLastError ();
1611 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1615 MONO_ARCH_SAVE_REGS;
1620 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1622 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1623 mono_string_chars (name));
1625 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1633 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1637 MONO_ARCH_SAVE_REGS;
1639 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1644 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1648 MONO_ARCH_SAVE_REGS;
1650 *error = ERROR_SUCCESS;
1652 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1654 *error = GetLastError ();
1660 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1664 MONO_ARCH_SAVE_REGS;
1669 event = CreateEvent (NULL, manual, initial, NULL);
1671 event = CreateEvent (NULL, manual, initial,
1672 mono_string_chars (name));
1674 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1682 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1683 MONO_ARCH_SAVE_REGS;
1685 return (SetEvent(handle));
1688 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1689 MONO_ARCH_SAVE_REGS;
1691 return (ResetEvent(handle));
1695 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1696 MONO_ARCH_SAVE_REGS;
1698 CloseHandle (handle);
1701 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1707 MONO_ARCH_SAVE_REGS;
1709 *error = ERROR_SUCCESS;
1711 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1713 *error = GetLastError ();
1719 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1721 MONO_ARCH_SAVE_REGS;
1723 return InterlockedIncrement (location);
1726 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1730 MONO_ARCH_SAVE_REGS;
1732 mono_interlocked_lock ();
1736 mono_interlocked_unlock ();
1742 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1744 MONO_ARCH_SAVE_REGS;
1746 return InterlockedDecrement(location);
1749 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1753 MONO_ARCH_SAVE_REGS;
1755 mono_interlocked_lock ();
1759 mono_interlocked_unlock ();
1764 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1766 MONO_ARCH_SAVE_REGS;
1768 return InterlockedExchange(location, value);
1771 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1774 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1775 mono_gc_wbarrier_generic_nostore (location);
1779 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1781 return InterlockedExchangePointer(location, value);
1784 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1786 IntFloatUnion val, ret;
1788 MONO_ARCH_SAVE_REGS;
1791 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1797 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1799 #if SIZEOF_VOID_P == 8
1800 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1805 * According to MSDN, this function is only atomic with regards to the
1806 * other Interlocked functions on 32 bit platforms.
1808 mono_interlocked_lock ();
1811 mono_interlocked_unlock ();
1818 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1820 #if SIZEOF_VOID_P == 8
1821 LongDoubleUnion val, ret;
1824 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1831 * According to MSDN, this function is only atomic with regards to the
1832 * other Interlocked functions on 32 bit platforms.
1834 mono_interlocked_lock ();
1837 mono_interlocked_unlock ();
1843 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1845 MONO_ARCH_SAVE_REGS;
1847 return InterlockedCompareExchange(location, value, comparand);
1850 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1853 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1854 mono_gc_wbarrier_generic_nostore (location);
1858 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1860 return InterlockedCompareExchangePointer(location, value, comparand);
1863 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1865 IntFloatUnion val, ret, cmp;
1867 MONO_ARCH_SAVE_REGS;
1870 cmp.fval = comparand;
1871 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1877 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1879 #if SIZEOF_VOID_P == 8
1880 LongDoubleUnion val, comp, ret;
1883 comp.fval = comparand;
1884 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1890 mono_interlocked_lock ();
1892 if (old == comparand)
1894 mono_interlocked_unlock ();
1901 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1903 #if SIZEOF_VOID_P == 8
1904 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1908 mono_interlocked_lock ();
1910 if (old == comparand)
1912 mono_interlocked_unlock ();
1919 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1922 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1923 mono_gc_wbarrier_generic_nostore (location);
1928 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1931 res = InterlockedExchangePointer ((gpointer *)location, value);
1932 mono_gc_wbarrier_generic_nostore (location);
1937 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1939 #if SIZEOF_VOID_P == 8
1940 /* Should be implemented as a JIT intrinsic */
1941 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1946 mono_interlocked_lock ();
1948 *location = orig + value;
1949 mono_interlocked_unlock ();
1951 return orig + value;
1956 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1958 #if SIZEOF_VOID_P == 8
1959 /* Should be implemented as a JIT intrinsic */
1960 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1965 mono_interlocked_lock ();
1967 *location = orig + value;
1968 mono_interlocked_unlock ();
1970 return orig + value;
1975 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1977 #if SIZEOF_VOID_P == 8
1978 /* 64 bit reads are already atomic */
1983 mono_interlocked_lock ();
1985 mono_interlocked_unlock ();
1992 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1994 mono_threads_lock ();
1995 mono_threads_unlock ();
1999 ves_icall_System_Threading_Thread_ClrState (MonoThread* this, guint32 state)
2001 mono_thread_clr_state (this, state);
2003 if (state & ThreadState_Background) {
2004 /* If the thread changes the background mode, the main thread has to
2005 * be notified, since it has to rebuild the list of threads to
2008 SetEvent (background_change_event);
2013 ves_icall_System_Threading_Thread_SetState (MonoThread* this, guint32 state)
2015 mono_thread_set_state (this, state);
2017 if (state & ThreadState_Background) {
2018 /* If the thread changes the background mode, the main thread has to
2019 * be notified, since it has to rebuild the list of threads to
2022 SetEvent (background_change_event);
2027 ves_icall_System_Threading_Thread_GetState (MonoThread* this)
2031 ensure_synch_cs_set (this);
2033 EnterCriticalSection (this->synch_cs);
2035 state = this->state;
2037 LeaveCriticalSection (this->synch_cs);
2042 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this)
2044 gboolean throw = FALSE;
2046 ensure_synch_cs_set (this);
2048 if (this == mono_thread_current ())
2051 EnterCriticalSection (this->synch_cs);
2053 this->thread_interrupt_requested = TRUE;
2055 if (this->state & ThreadState_WaitSleepJoin) {
2059 LeaveCriticalSection (this->synch_cs);
2062 signal_thread_state_change (this);
2066 void mono_thread_current_check_pending_interrupt ()
2068 MonoThread *thread = mono_thread_current ();
2069 gboolean throw = FALSE;
2071 mono_debugger_check_interruption ();
2073 ensure_synch_cs_set (thread);
2075 EnterCriticalSection (thread->synch_cs);
2077 if (thread->thread_interrupt_requested) {
2079 thread->thread_interrupt_requested = FALSE;
2082 LeaveCriticalSection (thread->synch_cs);
2085 mono_raise_exception (mono_get_exception_thread_interrupted ());
2090 mono_thread_get_abort_signal (void)
2092 #ifdef PLATFORM_WIN32
2102 static int abort_signum = -1;
2104 if (abort_signum != -1)
2105 return abort_signum;
2106 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2107 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2108 struct sigaction sinfo;
2109 sigaction (i, NULL, &sinfo);
2110 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2115 /* fallback to the old way */
2118 #endif /* PLATFORM_WIN32 */
2121 #ifdef PLATFORM_WIN32
2122 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2124 MonoException* exc = mono_thread_request_interruption (FALSE);
2125 if (exc) mono_raise_exception (exc);
2127 #endif /* PLATFORM_WIN32 */
2130 * signal_thread_state_change
2132 * Tells the thread that his state has changed and it has to enter the new
2133 * state as soon as possible.
2135 static void signal_thread_state_change (MonoThread *thread)
2137 if (thread == mono_thread_current ()) {
2138 /* Do it synchronously */
2139 MonoException *exc = mono_thread_request_interruption (FALSE);
2141 mono_raise_exception (exc);
2144 #ifdef PLATFORM_WIN32
2145 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2147 /* fixme: store the state somewhere */
2148 #ifdef PTHREAD_POINTER_ID
2149 pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
2151 pthread_kill (thread->tid, mono_thread_get_abort_signal ());
2155 * This will cause waits to be broken.
2156 * It will also prevent the thread from entering a wait, so if the thread returns
2157 * from the wait before it receives the abort signal, it will just spin in the wait
2158 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2161 wapi_interrupt_thread (thread->handle);
2162 #endif /* PLATFORM_WIN32 */
2166 ves_icall_System_Threading_Thread_Abort (MonoThread *thread, MonoObject *state)
2168 MONO_ARCH_SAVE_REGS;
2170 ensure_synch_cs_set (thread);
2172 EnterCriticalSection (thread->synch_cs);
2174 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2175 (thread->state & ThreadState_StopRequested) != 0 ||
2176 (thread->state & ThreadState_Stopped) != 0)
2178 LeaveCriticalSection (thread->synch_cs);
2182 if ((thread->state & ThreadState_Unstarted) != 0) {
2183 thread->state |= ThreadState_Aborted;
2184 LeaveCriticalSection (thread->synch_cs);
2188 thread->state |= ThreadState_AbortRequested;
2189 if (thread->abort_state_handle)
2190 mono_gchandle_free (thread->abort_state_handle);
2192 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2193 g_assert (thread->abort_state_handle);
2195 thread->abort_state_handle = 0;
2197 thread->abort_exc = NULL;
2199 LeaveCriticalSection (thread->synch_cs);
2201 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2203 /* During shutdown, we can't wait for other threads */
2205 /* Make sure the thread is awake */
2206 mono_thread_resume (thread);
2208 signal_thread_state_change (thread);
2212 ves_icall_System_Threading_Thread_ResetAbort (void)
2214 MonoThread *thread = mono_thread_current ();
2216 MONO_ARCH_SAVE_REGS;
2218 ensure_synch_cs_set (thread);
2220 EnterCriticalSection (thread->synch_cs);
2222 thread->state &= ~ThreadState_AbortRequested;
2224 if (!thread->abort_exc) {
2225 const char *msg = "Unable to reset abort because no abort was requested";
2226 LeaveCriticalSection (thread->synch_cs);
2227 mono_raise_exception (mono_get_exception_thread_state (msg));
2229 thread->abort_exc = NULL;
2230 if (thread->abort_state_handle) {
2231 mono_gchandle_free (thread->abort_state_handle);
2232 /* This is actually not necessary - the handle
2233 only counts if the exception is set */
2234 thread->abort_state_handle = 0;
2238 LeaveCriticalSection (thread->synch_cs);
2242 serialize_object (MonoObject *obj, gboolean *failure, MonoObject **exc)
2244 static MonoMethod *serialize_method;
2249 if (!serialize_method) {
2250 MonoClass *klass = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting", "RemotingServices");
2251 serialize_method = mono_class_get_method_from_name (klass, "SerializeCallData", -1);
2254 if (!serialize_method) {
2259 g_assert (!obj->vtable->klass->marshalbyref);
2263 array = mono_runtime_invoke (serialize_method, NULL, params, exc);
2271 deserialize_object (MonoObject *obj, gboolean *failure, MonoObject **exc)
2273 static MonoMethod *deserialize_method;
2278 if (!deserialize_method) {
2279 MonoClass *klass = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting", "RemotingServices");
2280 deserialize_method = mono_class_get_method_from_name (klass, "DeserializeCallData", -1);
2282 if (!deserialize_method) {
2289 result = mono_runtime_invoke (deserialize_method, NULL, params, exc);
2297 make_transparent_proxy (MonoObject *obj, gboolean *failure, MonoObject **exc)
2299 static MonoMethod *get_proxy_method;
2301 MonoDomain *domain = mono_domain_get ();
2302 MonoRealProxy *real_proxy;
2303 MonoReflectionType *reflection_type;
2304 MonoTransparentProxy *transparent_proxy;
2306 if (!get_proxy_method)
2307 get_proxy_method = mono_class_get_method_from_name (mono_defaults.real_proxy_class, "GetTransparentProxy", 0);
2309 g_assert (obj->vtable->klass->marshalbyref);
2311 real_proxy = (MonoRealProxy*) mono_object_new (domain, mono_defaults.real_proxy_class);
2312 reflection_type = mono_type_get_object (domain, &obj->vtable->klass->byval_arg);
2314 real_proxy->class_to_proxy = reflection_type;
2315 real_proxy->unwrapped_server = obj;
2318 transparent_proxy = (MonoTransparentProxy*) mono_runtime_invoke (get_proxy_method, real_proxy, NULL, exc);
2322 return (MonoObject*) transparent_proxy;
2326 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *thread)
2328 MonoObject *state, *serialized, *deserialized = NULL, *exc;
2330 gboolean failure = FALSE;
2332 if (!thread->abort_state_handle)
2335 state = mono_gchandle_get_target (thread->abort_state_handle);
2338 domain = mono_domain_get ();
2339 if (state->vtable->domain == domain)
2342 if (state->vtable->klass->marshalbyref) {
2343 deserialized = make_transparent_proxy (state, &failure, &exc);
2345 mono_domain_set_internal_with_options (state->vtable->domain, FALSE);
2346 serialized = serialize_object (state, &failure, &exc);
2347 mono_domain_set_internal_with_options (domain, FALSE);
2349 deserialized = deserialize_object (serialized, &failure, &exc);
2353 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2355 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2356 mono_raise_exception (invalid_op_exc);
2359 return deserialized;
2363 mono_thread_suspend (MonoThread *thread)
2365 MONO_ARCH_SAVE_REGS;
2367 ensure_synch_cs_set (thread);
2369 EnterCriticalSection (thread->synch_cs);
2371 if ((thread->state & ThreadState_Unstarted) != 0 ||
2372 (thread->state & ThreadState_Aborted) != 0 ||
2373 (thread->state & ThreadState_Stopped) != 0)
2375 LeaveCriticalSection (thread->synch_cs);
2379 if ((thread->state & ThreadState_Suspended) != 0 ||
2380 (thread->state & ThreadState_SuspendRequested) != 0 ||
2381 (thread->state & ThreadState_StopRequested) != 0)
2383 LeaveCriticalSection (thread->synch_cs);
2387 thread->state |= ThreadState_SuspendRequested;
2389 LeaveCriticalSection (thread->synch_cs);
2391 signal_thread_state_change (thread);
2396 ves_icall_System_Threading_Thread_Suspend (MonoThread *thread)
2398 if (!mono_thread_suspend (thread))
2399 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2403 mono_thread_resume (MonoThread *thread)
2405 MONO_ARCH_SAVE_REGS;
2407 ensure_synch_cs_set (thread);
2409 EnterCriticalSection (thread->synch_cs);
2411 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2412 thread->state &= ~ThreadState_SuspendRequested;
2413 LeaveCriticalSection (thread->synch_cs);
2417 if ((thread->state & ThreadState_Suspended) == 0 ||
2418 (thread->state & ThreadState_Unstarted) != 0 ||
2419 (thread->state & ThreadState_Aborted) != 0 ||
2420 (thread->state & ThreadState_Stopped) != 0)
2422 LeaveCriticalSection (thread->synch_cs);
2426 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2427 if (thread->resume_event == NULL) {
2428 LeaveCriticalSection (thread->synch_cs);
2432 /* Awake the thread */
2433 SetEvent (thread->suspend_event);
2435 LeaveCriticalSection (thread->synch_cs);
2437 /* Wait for the thread to awake */
2438 WaitForSingleObject (thread->resume_event, INFINITE);
2439 CloseHandle (thread->resume_event);
2440 thread->resume_event = NULL;
2446 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2448 if (!mono_thread_resume (thread))
2449 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2453 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2458 if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
2459 m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
2460 m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
2462 *((gboolean*)data) = TRUE;
2469 is_running_protected_wrapper (void)
2471 gboolean found = FALSE;
2472 mono_stack_walk (find_wrapper, &found);
2476 void mono_thread_stop (MonoThread *thread)
2478 ensure_synch_cs_set (thread);
2480 EnterCriticalSection (thread->synch_cs);
2482 if ((thread->state & ThreadState_StopRequested) != 0 ||
2483 (thread->state & ThreadState_Stopped) != 0)
2485 LeaveCriticalSection (thread->synch_cs);
2489 /* Make sure the thread is awake */
2490 mono_thread_resume (thread);
2492 thread->state |= ThreadState_StopRequested;
2493 thread->state &= ~ThreadState_AbortRequested;
2495 LeaveCriticalSection (thread->synch_cs);
2497 signal_thread_state_change (thread);
2501 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2503 return *((volatile gint8 *) (ptr));
2507 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2509 return *((volatile gint16 *) (ptr));
2513 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2515 return *((volatile gint32 *) (ptr));
2519 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2521 return *((volatile gint64 *) (ptr));
2525 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2527 return (void *) *((volatile void **) ptr);
2531 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2533 *((volatile gint8 *) ptr) = value;
2537 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2539 *((volatile gint16 *) ptr) = value;
2543 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2545 *((volatile gint32 *) ptr) = value;
2549 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2551 *((volatile gint64 *) ptr) = value;
2555 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2557 *((volatile void **) ptr) = value;
2561 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2563 mono_gc_wbarrier_generic_store (ptr, value);
2566 void mono_thread_init (MonoThreadStartCB start_cb,
2567 MonoThreadAttachCB attach_cb)
2569 MONO_GC_REGISTER_ROOT (small_id_table);
2570 InitializeCriticalSection(&threads_mutex);
2571 InitializeCriticalSection(&interlocked_mutex);
2572 InitializeCriticalSection(&contexts_mutex);
2573 InitializeCriticalSection(&delayed_free_table_mutex);
2574 InitializeCriticalSection(&small_id_mutex);
2576 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2577 g_assert(background_change_event != NULL);
2579 mono_init_static_data_info (&thread_static_info);
2580 mono_init_static_data_info (&context_static_info);
2582 current_object_key=TlsAlloc();
2583 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2585 mono_thread_start_cb = start_cb;
2586 mono_thread_attach_cb = attach_cb;
2588 delayed_free_table = g_array_new (FALSE, FALSE, sizeof (DelayedFreeItem));
2590 /* Get a pseudo handle to the current process. This is just a
2591 * kludge so that wapi can build a process handle if needed.
2592 * As a pseudo handle is returned, we don't need to clean
2595 GetCurrentProcess ();
2598 void mono_thread_cleanup (void)
2600 mono_thread_hazardous_try_free_all ();
2602 #if !defined(PLATFORM_WIN32) && !defined(RUN_IN_SUBTHREAD)
2603 /* The main thread must abandon any held mutexes (particularly
2604 * important for named mutexes as they are shared across
2605 * processes, see bug 74680.) This will happen when the
2606 * thread exits, but if it's not running in a subthread it
2607 * won't exit in time.
2609 /* Using non-w32 API is a nasty kludge, but I couldn't find
2610 * anything in the documentation that would let me do this
2611 * here yet still be safe to call on windows.
2613 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2617 /* This stuff needs more testing, it seems one of these
2618 * critical sections can be locked when mono_thread_cleanup is
2621 DeleteCriticalSection (&threads_mutex);
2622 DeleteCriticalSection (&interlocked_mutex);
2623 DeleteCriticalSection (&contexts_mutex);
2624 DeleteCriticalSection (&delayed_free_table_mutex);
2625 DeleteCriticalSection (&small_id_mutex);
2626 CloseHandle (background_change_event);
2629 g_array_free (delayed_free_table, TRUE);
2630 delayed_free_table = NULL;
2632 TlsFree (current_object_key);
2636 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2638 mono_thread_cleanup_fn = func;
2642 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2644 thread->manage_callback = func;
2647 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2649 mono_thread_notify_pending_exc_fn = func;
2653 static void print_tids (gpointer key, gpointer value, gpointer user)
2655 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2656 * sizeof(uint) and a cast to uint would overflow
2658 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2659 * print this as a pointer.
2661 g_message ("Waiting for: %p", key);
2666 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2667 MonoThread *threads[MAXIMUM_WAIT_OBJECTS];
2671 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2675 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2677 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, FALSE);
2679 if(ret==WAIT_FAILED) {
2680 /* See the comment in build_wait_tids() */
2681 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2685 for(i=0; i<wait->num; i++)
2686 CloseHandle (wait->handles[i]);
2688 if (ret == WAIT_TIMEOUT)
2691 for(i=0; i<wait->num; i++) {
2692 gsize tid = wait->threads[i]->tid;
2694 mono_threads_lock ();
2695 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2696 /* This thread must have been killed, because
2697 * it hasn't cleaned itself up. (It's just
2698 * possible that the thread exited before the
2699 * parent thread had a chance to store the
2700 * handle, and now there is another pointer to
2701 * the already-exited thread stored. In this
2702 * case, we'll just get two
2703 * mono_profiler_thread_end() calls for the
2707 mono_threads_unlock ();
2708 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2709 thread_cleanup (wait->threads[i]);
2711 mono_threads_unlock ();
2716 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2718 guint32 i, ret, count;
2720 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2722 /* Add the thread state change event, so it wakes up if a thread changes
2723 * to background mode.
2726 if (count < MAXIMUM_WAIT_OBJECTS) {
2727 wait->handles [count] = background_change_event;
2731 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, FALSE);
2733 if(ret==WAIT_FAILED) {
2734 /* See the comment in build_wait_tids() */
2735 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2739 for(i=0; i<wait->num; i++)
2740 CloseHandle (wait->handles[i]);
2742 if (ret == WAIT_TIMEOUT)
2745 if (ret < wait->num) {
2746 gsize tid = wait->threads[ret]->tid;
2747 mono_threads_lock ();
2748 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2749 /* See comment in wait_for_tids about thread cleanup */
2750 mono_threads_unlock ();
2751 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2752 thread_cleanup (wait->threads [ret]);
2754 mono_threads_unlock ();
2758 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2760 struct wait_data *wait=(struct wait_data *)user;
2762 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2764 MonoThread *thread=(MonoThread *)value;
2766 /* Ignore background threads, we abort them later */
2767 /* Do not lock here since it is not needed and the caller holds threads_lock */
2768 if (thread->state & ThreadState_Background) {
2769 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2770 return; /* just leave, ignore */
2773 if (mono_gc_is_finalizer_thread (thread)) {
2774 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2778 if (thread == mono_thread_current ()) {
2779 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2783 if (thread == mono_thread_get_main ()) {
2784 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2788 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2789 if (handle == NULL) {
2790 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2794 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2795 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread) == TRUE)) {
2796 wait->handles[wait->num]=handle;
2797 wait->threads[wait->num]=thread;
2800 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2802 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2807 /* Just ignore the rest, we can't do anything with
2814 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2816 struct wait_data *wait=(struct wait_data *)user;
2817 gsize self = GetCurrentThreadId ();
2818 MonoThread *thread = (MonoThread *) value;
2821 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2824 /* The finalizer thread is not a background thread */
2825 if (thread->tid != self && (thread->state & ThreadState_Background) != 0) {
2827 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2831 /* printf ("A: %d\n", wait->num); */
2832 wait->handles[wait->num]=thread->handle;
2833 wait->threads[wait->num]=thread;
2836 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2837 mono_thread_stop (thread);
2841 return (thread->tid != self && !mono_gc_is_finalizer_thread (thread));
2845 * mono_threads_set_shutting_down:
2847 * Is called by a thread that wants to shut down Mono. If the runtime is already
2848 * shutting down, the calling thread is suspended/stopped, and this function never
2852 mono_threads_set_shutting_down (void)
2854 MonoThread *current_thread = mono_thread_current ();
2856 mono_threads_lock ();
2858 if (shutting_down) {
2859 mono_threads_unlock ();
2861 /* Make sure we're properly suspended/stopped */
2863 EnterCriticalSection (current_thread->synch_cs);
2865 if ((current_thread->state & ThreadState_SuspendRequested) ||
2866 (current_thread->state & ThreadState_AbortRequested) ||
2867 (current_thread->state & ThreadState_StopRequested)) {
2868 LeaveCriticalSection (current_thread->synch_cs);
2869 mono_thread_execute_interruption (current_thread);
2871 current_thread->state |= ThreadState_Stopped;
2872 LeaveCriticalSection (current_thread->synch_cs);
2875 /* Wake up other threads potentially waiting for us */
2878 shutting_down = TRUE;
2880 /* Not really a background state change, but this will
2881 * interrupt the main thread if it is waiting for all
2882 * the other threads.
2884 SetEvent (background_change_event);
2886 mono_threads_unlock ();
2891 * mono_threads_is_shutting_down:
2893 * Returns whether a thread has commenced shutdown of Mono. Note that
2894 * if the function returns FALSE the caller must not assume that
2895 * shutdown is not in progress, because the situation might have
2896 * changed since the function returned. For that reason this function
2897 * is of very limited utility.
2900 mono_threads_is_shutting_down (void)
2902 return shutting_down;
2905 void mono_thread_manage (void)
2907 struct wait_data *wait=g_new0 (struct wait_data, 1);
2909 /* join each thread that's still running */
2910 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2912 mono_threads_lock ();
2914 THREAD_DEBUG (g_message("%s: No threads", __func__));
2915 mono_threads_unlock ();
2919 mono_threads_unlock ();
2922 mono_threads_lock ();
2923 if (shutting_down) {
2924 /* somebody else is shutting down */
2925 mono_threads_unlock ();
2928 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2929 mono_g_hash_table_foreach (threads, print_tids, NULL));
2931 ResetEvent (background_change_event);
2933 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2934 mono_threads_unlock ();
2936 /* Something to wait for */
2937 wait_for_tids_or_state_change (wait, INFINITE);
2939 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2940 } while(wait->num>0);
2942 mono_threads_set_shutting_down ();
2944 /* No new threads will be created after this point */
2946 mono_runtime_set_shutting_down ();
2948 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2949 mono_thread_pool_cleanup ();
2952 * Remove everything but the finalizer thread and self.
2953 * Also abort all the background threads
2956 mono_threads_lock ();
2959 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2961 mono_threads_unlock ();
2963 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2965 /* Something to wait for */
2966 wait_for_tids (wait, INFINITE);
2968 } while (wait->num > 0);
2971 * give the subthreads a chance to really quit (this is mainly needed
2972 * to get correct user and system times from getrusage/wait/time(1)).
2973 * This could be removed if we avoid pthread_detach() and use pthread_join().
2975 #ifndef PLATFORM_WIN32
2982 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2984 MonoThread *thread=(MonoThread *)value;
2986 if(thread->tid != (gsize)user) {
2987 /*TerminateThread (thread->handle, -1);*/
2991 void mono_thread_abort_all_other_threads (void)
2993 gsize self = GetCurrentThreadId ();
2995 mono_threads_lock ();
2996 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2997 mono_g_hash_table_size (threads));
2998 mono_g_hash_table_foreach (threads, print_tids, NULL));
3000 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3002 mono_threads_unlock ();
3006 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3008 MonoThread *thread = (MonoThread*)value;
3009 struct wait_data *wait = (struct wait_data*)user_data;
3013 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3015 * This needs no locking.
3017 if ((thread->state & ThreadState_Suspended) != 0 ||
3018 (thread->state & ThreadState_Stopped) != 0)
3021 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3022 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3026 wait->handles [wait->num] = handle;
3027 wait->threads [wait->num] = thread;
3033 * mono_thread_suspend_all_other_threads:
3035 * Suspend all managed threads except the finalizer thread and this thread. It is
3036 * not possible to resume them later.
3038 void mono_thread_suspend_all_other_threads (void)
3040 struct wait_data *wait = g_new0 (struct wait_data, 1);
3042 gsize self = GetCurrentThreadId ();
3044 guint32 eventidx = 0;
3045 gboolean starting, finished;
3048 * The other threads could be in an arbitrary state at this point, i.e.
3049 * they could be starting up, shutting down etc. This means that there could be
3050 * threads which are not even in the threads hash table yet.
3054 * First we set a barrier which will be checked by all threads before they
3055 * are added to the threads hash table, and they will exit if the flag is set.
3056 * This ensures that no threads could be added to the hash later.
3057 * We will use shutting_down as the barrier for now.
3059 g_assert (shutting_down);
3062 * We make multiple calls to WaitForMultipleObjects since:
3063 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3064 * - some threads could exit without becoming suspended
3069 * Make a copy of the hashtable since we can't do anything with
3070 * threads while threads_mutex is held.
3073 mono_threads_lock ();
3074 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3075 mono_threads_unlock ();
3077 events = g_new0 (gpointer, wait->num);
3079 /* Get the suspended events that we'll be waiting for */
3080 for (i = 0; i < wait->num; ++i) {
3081 MonoThread *thread = wait->threads [i];
3082 gboolean signal_suspend = FALSE;
3084 if ((thread->tid == self) || mono_gc_is_finalizer_thread (thread)) {
3085 //CloseHandle (wait->handles [i]);
3086 wait->threads [i] = NULL; /* ignore this thread in next loop */
3090 ensure_synch_cs_set (thread);
3092 EnterCriticalSection (thread->synch_cs);
3094 if (thread->suspended_event == NULL) {
3095 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3096 if (thread->suspended_event == NULL) {
3097 /* Forget this one and go on to the next */
3098 LeaveCriticalSection (thread->synch_cs);
3103 if ((thread->state & ThreadState_Suspended) != 0 ||
3104 (thread->state & ThreadState_StopRequested) != 0 ||
3105 (thread->state & ThreadState_Stopped) != 0) {
3106 LeaveCriticalSection (thread->synch_cs);
3107 CloseHandle (wait->handles [i]);
3108 wait->threads [i] = NULL; /* ignore this thread in next loop */
3112 if ((thread->state & ThreadState_SuspendRequested) == 0)
3113 signal_suspend = TRUE;
3115 events [eventidx++] = thread->suspended_event;
3117 /* Convert abort requests into suspend requests */
3118 if ((thread->state & ThreadState_AbortRequested) != 0)
3119 thread->state &= ~ThreadState_AbortRequested;
3121 thread->state |= ThreadState_SuspendRequested;
3123 LeaveCriticalSection (thread->synch_cs);
3125 /* Signal the thread to suspend */
3127 signal_thread_state_change (thread);
3131 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3132 for (i = 0; i < wait->num; ++i) {
3133 MonoThread *thread = wait->threads [i];
3138 EnterCriticalSection (thread->synch_cs);
3139 if ((thread->state & ThreadState_Suspended) != 0) {
3140 CloseHandle (thread->suspended_event);
3141 thread->suspended_event = NULL;
3143 LeaveCriticalSection (thread->synch_cs);
3147 * If there are threads which are starting up, we wait until they
3148 * are suspended when they try to register in the threads hash.
3149 * This is guaranteed to finish, since the threads which can create new
3150 * threads get suspended after a while.
3151 * FIXME: The finalizer thread can still create new threads.
3153 mono_threads_lock ();
3154 if (threads_starting_up)
3155 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3158 mono_threads_unlock ();
3172 collect_threads (gpointer key, gpointer value, gpointer user_data)
3174 MonoThread *thread = (MonoThread*)value;
3175 struct wait_data *wait = (struct wait_data*)user_data;
3178 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3179 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3183 wait->handles [wait->num] = handle;
3184 wait->threads [wait->num] = thread;
3190 * mono_threads_request_thread_dump:
3192 * Ask all threads except the current to print their stacktrace to stdout.
3195 mono_threads_request_thread_dump (void)
3197 struct wait_data *wait = g_new0 (struct wait_data, 1);
3201 * Make a copy of the hashtable since we can't do anything with
3202 * threads while threads_mutex is held.
3204 mono_threads_lock ();
3205 mono_g_hash_table_foreach (threads, collect_threads, wait);
3206 mono_threads_unlock ();
3208 for (i = 0; i < wait->num; ++i) {
3209 MonoThread *thread = wait->threads [i];
3211 if (!mono_gc_is_finalizer_thread (thread) && (thread != mono_thread_current ()) && !thread->thread_dump_requested) {
3212 thread->thread_dump_requested = TRUE;
3214 signal_thread_state_change (thread);
3217 CloseHandle (wait->handles [i]);
3222 * mono_thread_push_appdomain_ref:
3224 * Register that the current thread may have references to objects in domain
3225 * @domain on its stack. Each call to this function should be paired with a
3226 * call to pop_appdomain_ref.
3229 mono_thread_push_appdomain_ref (MonoDomain *domain)
3231 MonoThread *thread = mono_thread_current ();
3234 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3235 mono_threads_lock ();
3236 thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
3237 mono_threads_unlock ();
3242 mono_thread_pop_appdomain_ref (void)
3244 MonoThread *thread = mono_thread_current ();
3247 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3248 mono_threads_lock ();
3249 /* FIXME: How can the list be empty ? */
3250 if (thread->appdomain_refs)
3251 thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
3252 mono_threads_unlock ();
3257 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3260 mono_threads_lock ();
3261 res = g_slist_find (thread->appdomain_refs, domain) != NULL;
3262 mono_threads_unlock ();
3266 typedef struct abort_appdomain_data {
3267 struct wait_data wait;
3269 } abort_appdomain_data;
3272 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3274 MonoThread *thread = (MonoThread*)value;
3275 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3276 MonoDomain *domain = data->domain;
3278 if (mono_thread_has_appdomain_ref (thread, domain)) {
3279 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3281 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3282 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3285 data->wait.handles [data->wait.num] = handle;
3286 data->wait.threads [data->wait.num] = thread;
3289 /* Just ignore the rest, we can't do anything with
3297 * mono_threads_abort_appdomain_threads:
3299 * Abort threads which has references to the given appdomain.
3302 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3304 abort_appdomain_data user_data;
3306 int orig_timeout = timeout;
3309 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3311 start_time = mono_msec_ticks ();
3313 mono_threads_lock ();
3315 user_data.domain = domain;
3316 user_data.wait.num = 0;
3317 /* This shouldn't take any locks */
3318 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3319 mono_threads_unlock ();
3321 if (user_data.wait.num > 0) {
3322 /* Abort the threads outside the threads lock */
3323 for (i = 0; i < user_data.wait.num; ++i)
3324 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3327 * We should wait for the threads either to abort, or to leave the
3328 * domain. We can't do the latter, so we wait with a timeout.
3330 wait_for_tids (&user_data.wait, 100);
3333 /* Update remaining time */
3334 timeout -= mono_msec_ticks () - start_time;
3335 start_time = mono_msec_ticks ();
3337 if (orig_timeout != -1 && timeout < 0)
3340 while (user_data.wait.num > 0);
3342 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3348 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3350 MonoThread *thread = (MonoThread*)value;
3351 MonoDomain *domain = (MonoDomain*)user_data;
3354 /* No locking needed here */
3355 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3357 if (thread->cached_culture_info) {
3358 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3359 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3360 if (obj && obj->vtable->domain == domain)
3361 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3367 * mono_threads_clear_cached_culture:
3369 * Clear the cached_current_culture from all threads if it is in the
3373 mono_threads_clear_cached_culture (MonoDomain *domain)
3375 mono_threads_lock ();
3376 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3377 mono_threads_unlock ();
3381 * mono_thread_get_undeniable_exception:
3383 * Return an exception which needs to be raised when leaving a catch clause.
3384 * This is used for undeniable exception propagation.
3387 mono_thread_get_undeniable_exception (void)
3389 MonoThread *thread = mono_thread_current ();
3391 MONO_ARCH_SAVE_REGS;
3393 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3395 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3396 * exception if the thread no longer references a dying appdomain.
3398 thread->abort_exc->trace_ips = NULL;
3399 thread->abort_exc->stack_trace = NULL;
3400 return thread->abort_exc;
3406 #define NUM_STATIC_DATA_IDX 8
3407 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3408 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3413 * mono_alloc_static_data
3415 * Allocate memory blocks for storing threads or context static data
3418 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset)
3420 guint idx = (offset >> 24) - 1;
3423 gpointer* static_data = *static_data_ptr;
3425 static_data = mono_gc_alloc_fixed (static_data_size [0], NULL);
3426 *static_data_ptr = static_data;
3427 static_data [0] = static_data;
3430 for (i = 1; i <= idx; ++i) {
3431 if (static_data [i])
3433 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3438 * mono_init_static_data_info
3440 * Initializes static data counters
3442 static void mono_init_static_data_info (StaticDataInfo *static_data)
3444 static_data->idx = 0;
3445 static_data->offset = 0;
3446 static_data->freelist = NULL;
3450 * mono_alloc_static_data_slot
3452 * Generates an offset for static data. static_data contains the counters
3453 * used to generate it.
3456 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3460 if (!static_data->idx && !static_data->offset) {
3462 * we use the first chunk of the first allocation also as
3463 * an array for the rest of the data
3465 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3467 static_data->offset += align - 1;
3468 static_data->offset &= ~(align - 1);
3469 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3470 static_data->idx ++;
3471 g_assert (size <= static_data_size [static_data->idx]);
3472 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3473 static_data->offset = 0;
3475 offset = static_data->offset | ((static_data->idx + 1) << 24);
3476 static_data->offset += size;
3481 * ensure thread static fields already allocated are valid for thread
3482 * This function is called when a thread is created or on thread attach.
3485 thread_adjust_static_data (MonoThread *thread)
3489 mono_threads_lock ();
3490 if (thread_static_info.offset || thread_static_info.idx > 0) {
3491 /* get the current allocated size */
3492 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3493 mono_alloc_static_data (&(thread->static_data), offset);
3495 mono_threads_unlock ();
3499 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3501 MonoThread *thread = value;
3502 guint32 offset = GPOINTER_TO_UINT (user);
3504 mono_alloc_static_data (&(thread->static_data), offset);
3507 static MonoThreadDomainTls*
3508 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3510 MonoThreadDomainTls* prev = NULL;
3511 MonoThreadDomainTls* tmp = static_data->freelist;
3513 if (tmp->size == size) {
3515 prev->next = tmp->next;
3517 static_data->freelist = tmp->next;
3526 * The offset for a special static variable is composed of three parts:
3527 * a bit that indicates the type of static data (0:thread, 1:context),
3528 * an index in the array of chunks of memory for the thread (thread->static_data)
3529 * and an offset in that chunk of mem. This allows allocating less memory in the
3534 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align)
3537 if (static_type == SPECIAL_STATIC_THREAD)
3539 MonoThreadDomainTls *item;
3540 mono_threads_lock ();
3541 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3542 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3544 offset = item->offset;
3547 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3549 /* This can be called during startup */
3550 if (threads != NULL)
3551 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3552 mono_threads_unlock ();
3556 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3557 mono_contexts_lock ();
3558 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3559 mono_contexts_unlock ();
3560 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3566 mono_get_special_static_data (guint32 offset)
3568 /* The high bit means either thread (0) or static (1) data. */
3570 guint32 static_type = (offset & 0x80000000);
3573 offset &= 0x7fffffff;
3574 idx = (offset >> 24) - 1;
3576 if (static_type == 0)
3578 MonoThread *thread = mono_thread_current ();
3579 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3583 /* Allocate static data block under demand, since we don't have a list
3586 MonoAppContext *context = mono_context_get ();
3587 if (!context->static_data || !context->static_data [idx]) {
3588 mono_contexts_lock ();
3589 mono_alloc_static_data (&(context->static_data), offset);
3590 mono_contexts_unlock ();
3592 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3602 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3604 MonoThread *thread = value;
3605 TlsOffsetSize *data = user;
3606 int idx = (data->offset >> 24) - 1;
3609 if (!thread->static_data || !thread->static_data [idx])
3611 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3612 memset (ptr, 0, data->size);
3616 do_free_special (gpointer key, gpointer value, gpointer data)
3618 MonoClassField *field = key;
3619 guint32 offset = GPOINTER_TO_UINT (value);
3620 guint32 static_type = (offset & 0x80000000);
3623 size = mono_type_size (field->type, &align);
3624 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3625 if (static_type == 0) {
3627 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3628 data.offset = offset & 0x7fffffff;
3630 if (threads != NULL)
3631 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3632 item->offset = offset;
3634 item->next = thread_static_info.freelist;
3635 thread_static_info.freelist = item;
3637 /* FIXME: free context static data as well */
3642 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3644 mono_threads_lock ();
3645 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3646 mono_threads_unlock ();
3649 static MonoClassField *local_slots = NULL;
3652 /* local tls data to get locals_slot from a thread */
3655 /* index in the locals_slot array */
3660 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3662 LocalSlotID *sid = user_data;
3663 MonoThread *thread = (MonoThread*)value;
3664 MonoArray *slots_array;
3666 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3667 * it is for the right domain, so we need to check if it is allocated an initialized
3668 * for the current thread.
3670 /*g_print ("handling thread %p\n", thread);*/
3671 if (!thread->static_data || !thread->static_data [sid->idx])
3673 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3674 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3676 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3680 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3688 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3690 g_warning ("local_slots field not found in Thread class");
3694 domain = mono_domain_get ();
3695 mono_domain_lock (domain);
3696 if (domain->special_static_fields)
3697 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3698 mono_domain_unlock (domain);
3701 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3702 sid.offset = GPOINTER_TO_UINT (addr);
3703 sid.offset &= 0x7fffffff;
3704 sid.idx = (sid.offset >> 24) - 1;
3705 mono_threads_lock ();
3706 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3707 mono_threads_unlock ();
3709 /* FIXME: clear the slot for MonoAppContexts, too */
3713 #ifdef PLATFORM_WIN32
3714 static void CALLBACK dummy_apc (ULONG_PTR param)
3718 static guint32 dummy_apc (gpointer param)
3725 * mono_thread_execute_interruption
3727 * Performs the operation that the requested thread state requires (abort,
3730 static MonoException* mono_thread_execute_interruption (MonoThread *thread)
3732 ensure_synch_cs_set (thread);
3734 EnterCriticalSection (thread->synch_cs);
3736 /* MonoThread::interruption_requested can only be changed with atomics */
3737 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
3738 /* this will consume pending APC calls */
3739 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
3740 InterlockedDecrement (&thread_interruption_requested);
3741 #ifndef PLATFORM_WIN32
3742 /* Clear the interrupted flag of the thread so it can wait again */
3743 wapi_clear_interruption ();
3747 if ((thread->state & ThreadState_AbortRequested) != 0) {
3748 LeaveCriticalSection (thread->synch_cs);
3749 if (thread->abort_exc == NULL) {
3751 * This might be racy, but it has to be called outside the lock
3752 * since it calls managed code.
3754 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
3756 return thread->abort_exc;
3758 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
3759 thread->state &= ~ThreadState_SuspendRequested;
3760 thread->state |= ThreadState_Suspended;
3761 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3762 if (thread->suspend_event == NULL) {
3763 LeaveCriticalSection (thread->synch_cs);
3766 if (thread->suspended_event)
3767 SetEvent (thread->suspended_event);
3769 LeaveCriticalSection (thread->synch_cs);
3771 if (shutting_down) {
3772 /* After we left the lock, the runtime might shut down so everything becomes invalid */
3777 WaitForSingleObject (thread->suspend_event, INFINITE);
3779 EnterCriticalSection (thread->synch_cs);
3781 CloseHandle (thread->suspend_event);
3782 thread->suspend_event = NULL;
3783 thread->state &= ~ThreadState_Suspended;
3785 /* The thread that requested the resume will have replaced this event
3786 * and will be waiting for it
3788 SetEvent (thread->resume_event);
3790 LeaveCriticalSection (thread->synch_cs);
3794 else if ((thread->state & ThreadState_StopRequested) != 0) {
3795 /* FIXME: do this through the JIT? */
3797 LeaveCriticalSection (thread->synch_cs);
3799 mono_thread_exit ();
3801 } else if (thread->thread_interrupt_requested) {
3803 thread->thread_interrupt_requested = FALSE;
3804 LeaveCriticalSection (thread->synch_cs);
3806 return(mono_get_exception_thread_interrupted ());
3809 LeaveCriticalSection (thread->synch_cs);
3815 * mono_thread_request_interruption
3817 * A signal handler can call this method to request the interruption of a
3818 * thread. The result of the interruption will depend on the current state of
3819 * the thread. If the result is an exception that needs to be throw, it is
3820 * provided as return value.
3823 mono_thread_request_interruption (gboolean running_managed)
3825 MonoThread *thread = mono_thread_current ();
3827 /* The thread may already be stopping */
3831 #ifdef PLATFORM_WIN32
3832 if (thread->interrupt_on_stop &&
3833 thread->state & ThreadState_StopRequested &&
3834 thread->state & ThreadState_Background)
3838 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
3841 if (!running_managed || is_running_protected_wrapper ()) {
3842 /* Can't stop while in unmanaged code. Increase the global interruption
3843 request count. When exiting the unmanaged method the count will be
3844 checked and the thread will be interrupted. */
3846 InterlockedIncrement (&thread_interruption_requested);
3848 if (mono_thread_notify_pending_exc_fn && !running_managed)
3849 /* The JIT will notify the thread about the interruption */
3850 /* This shouldn't take any locks */
3851 mono_thread_notify_pending_exc_fn ();
3853 /* this will awake the thread if it is in WaitForSingleObject
3855 /* Our implementation of this function ignores the func argument */
3856 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
3860 return mono_thread_execute_interruption (thread);
3864 gboolean mono_thread_interruption_requested ()
3866 if (thread_interruption_requested) {
3867 MonoThread *thread = mono_thread_current ();
3868 /* The thread may already be stopping */
3870 return (thread->interruption_requested);
3875 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
3877 MonoThread *thread = mono_thread_current ();
3879 /* The thread may already be stopping */
3883 mono_debugger_check_interruption ();
3885 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
3886 MonoException* exc = mono_thread_execute_interruption (thread);
3887 if (exc) mono_raise_exception (exc);
3892 * Performs the interruption of the current thread, if one has been requested,
3893 * and the thread is not running a protected wrapper.
3895 void mono_thread_interruption_checkpoint ()
3897 mono_thread_interruption_checkpoint_request (FALSE);
3901 * Performs the interruption of the current thread, if one has been requested.
3903 void mono_thread_force_interruption_checkpoint ()
3905 mono_thread_interruption_checkpoint_request (TRUE);
3909 * mono_thread_get_and_clear_pending_exception:
3911 * Return any pending exceptions for the current thread and clear it as a side effect.
3914 mono_thread_get_and_clear_pending_exception (void)
3916 MonoThread *thread = mono_thread_current ();
3918 /* The thread may already be stopping */
3922 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
3923 return mono_thread_execute_interruption (thread);
3926 if (thread->pending_exception) {
3927 MonoException *exc = thread->pending_exception;
3929 thread->pending_exception = NULL;
3937 * mono_set_pending_exception:
3939 * Set the pending exception of the current thread to EXC. On platforms which
3940 * support it, the exception will be thrown when execution returns to managed code.
3941 * On other platforms, this function is equivalent to mono_raise_exception ().
3942 * Internal calls which report exceptions using this function instead of
3943 * raise_exception () might be called by JITted code using a more efficient calling
3947 mono_set_pending_exception (MonoException *exc)
3949 MonoThread *thread = mono_thread_current ();
3951 /* The thread may already be stopping */
3955 if (mono_thread_notify_pending_exc_fn) {
3956 MONO_OBJECT_SETREF (thread, pending_exception, exc);
3958 mono_thread_notify_pending_exc_fn ();
3960 /* No way to notify the JIT about the exception, have to throw it now */
3961 mono_raise_exception (exc);
3966 * mono_thread_interruption_request_flag:
3968 * Returns the address of a flag that will be non-zero if an interruption has
3969 * been requested for a thread. The thread to interrupt may not be the current
3970 * thread, so an additional call to mono_thread_interruption_requested() or
3971 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
3974 gint32* mono_thread_interruption_request_flag ()
3976 return &thread_interruption_requested;
3980 mono_thread_init_apartment_state (void)
3983 thread = mono_thread_current ();
3985 #ifdef PLATFORM_WIN32
3986 /* Positive return value indicates success, either
3987 * S_OK if this is first CoInitialize call, or
3988 * S_FALSE if CoInitialize already called, but with same
3989 * threading model. A negative value indicates failure,
3990 * probably due to trying to change the threading model.
3992 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
3993 ? COINIT_APARTMENTTHREADED
3994 : COINIT_MULTITHREADED) < 0) {
3995 thread->apartment_state = ThreadApartmentState_Unknown;
4001 mono_thread_cleanup_apartment_state (void)
4003 #ifdef PLATFORM_WIN32
4005 thread = mono_thread_current ();
4007 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4014 mono_thread_set_state (MonoThread *thread, MonoThreadState state)
4016 ensure_synch_cs_set (thread);
4018 EnterCriticalSection (thread->synch_cs);
4019 thread->state |= state;
4020 LeaveCriticalSection (thread->synch_cs);
4024 mono_thread_clr_state (MonoThread *thread, MonoThreadState state)
4026 ensure_synch_cs_set (thread);
4028 EnterCriticalSection (thread->synch_cs);
4029 thread->state &= ~state;
4030 LeaveCriticalSection (thread->synch_cs);
4034 mono_thread_test_state (MonoThread *thread, MonoThreadState test)
4036 gboolean ret = FALSE;
4038 ensure_synch_cs_set (thread);
4040 EnterCriticalSection (thread->synch_cs);
4042 if ((thread->state & test) != 0) {
4046 LeaveCriticalSection (thread->synch_cs);
4051 static MonoClassField *execution_context_field;
4054 get_execution_context_addr (void)
4056 MonoDomain *domain = mono_domain_get ();
4059 if (!execution_context_field) {
4060 execution_context_field = mono_class_get_field_from_name (mono_defaults.thread_class,
4062 g_assert (execution_context_field);
4065 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4067 mono_domain_lock (domain);
4068 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, execution_context_field));
4069 mono_domain_unlock (domain);
4072 return (MonoObject**) mono_get_special_static_data (offset);
4076 mono_thread_get_execution_context (void)
4078 return *get_execution_context_addr ();
4082 mono_thread_set_execution_context (MonoObject *ec)
4084 *get_execution_context_addr () = ec;
4087 static gboolean has_tls_get = FALSE;
4090 mono_runtime_set_has_tls_get (gboolean val)
4096 mono_runtime_has_tls_get (void)