2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
19 #include <mono/metadata/object.h>
20 #include <mono/metadata/domain-internals.h>
21 #include <mono/metadata/profiler-private.h>
22 #include <mono/metadata/threads.h>
23 #include <mono/metadata/threadpool.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internal.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/io-layer/io-layer.h>
31 #ifndef PLATFORM_WIN32
32 #include <mono/io-layer/threads.h>
34 #include <mono/metadata/object-internals.h>
35 #include <mono/metadata/mono-debug-debugger.h>
36 #include <mono/utils/mono-compiler.h>
37 #include <mono/utils/mono-mmap.h>
38 #include <mono/utils/mono-membar.h>
39 #include <mono/utils/mono-time.h>
41 #include <mono/metadata/gc-internal.h>
43 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
44 #define THREAD_DEBUG(a)
45 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
46 #define THREAD_WAIT_DEBUG(a)
47 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
48 #define LIBGC_DEBUG(a)
50 /* Provide this for systems with glib < 2.6 */
51 #ifndef G_GSIZE_FORMAT
52 # if GLIB_SIZEOF_LONG == 8
53 # define G_GSIZE_FORMAT "lu"
55 # define G_GSIZE_FORMAT "u"
61 guint32 (*func)(void *);
78 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
79 struct _MonoThreadDomainTls {
80 MonoThreadDomainTls *next;
88 MonoThreadDomainTls *freelist;
93 MonoHazardousFreeFunc free_func;
96 /* Number of cached culture objects in the MonoThread->cached_culture_info array
97 * (per-type): we use the first NUM entries for CultureInfo and the last for
98 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
100 #define NUM_CACHED_CULTURES 4
101 #define CULTURES_START_IDX 0
102 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
104 /* Controls access to the 'threads' hash table */
105 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
106 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
107 static CRITICAL_SECTION threads_mutex;
109 /* Controls access to context static data */
110 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
111 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
112 static CRITICAL_SECTION contexts_mutex;
114 /* Holds current status of static data heap */
115 static StaticDataInfo thread_static_info;
116 static StaticDataInfo context_static_info;
118 /* The hash of existing threads (key is thread ID) that need joining
121 static MonoGHashTable *threads=NULL;
124 * Threads which are starting up and they are not in the 'threads' hash yet.
125 * When handle_store is called for a thread, it will be removed from this hash table.
126 * Protected by mono_threads_lock ().
128 static MonoGHashTable *threads_starting_up = NULL;
130 /* The TLS key that holds the MonoObject assigned to each thread */
131 static guint32 current_object_key = -1;
133 #ifdef HAVE_KW_THREAD
134 /* we need to use both the Tls* functions and __thread because
135 * the gc needs to see all the threads
137 static __thread MonoThread * tls_current_object MONO_TLS_FAST;
138 #define SET_CURRENT_OBJECT(x) do { \
139 tls_current_object = x; \
140 TlsSetValue (current_object_key, x); \
142 #define GET_CURRENT_OBJECT() tls_current_object
144 #define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x);
145 #define GET_CURRENT_OBJECT() (MonoThread*) TlsGetValue (current_object_key);
148 /* function called at thread start */
149 static MonoThreadStartCB mono_thread_start_cb = NULL;
151 /* function called at thread attach */
152 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
154 /* function called at thread cleanup */
155 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
157 /* function called to notify the runtime about a pending exception on the current thread */
158 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
160 /* The default stack size for each thread */
161 static guint32 default_stacksize = 0;
162 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
164 static void thread_adjust_static_data (MonoThread *thread);
165 static void mono_init_static_data_info (StaticDataInfo *static_data);
166 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
167 static gboolean mono_thread_resume (MonoThread* thread);
168 static void mono_thread_start (MonoThread *thread);
169 static void signal_thread_state_change (MonoThread *thread);
171 /* Spin lock for InterlockedXXX 64 bit functions */
172 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
173 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
174 static CRITICAL_SECTION interlocked_mutex;
176 /* global count of thread interruptions requested */
177 static gint32 thread_interruption_requested = 0;
179 /* Event signaled when a thread changes its background mode */
180 static HANDLE background_change_event;
182 /* The table for small ID assignment */
183 static CRITICAL_SECTION small_id_mutex;
184 static int small_id_table_size = 0;
185 static int small_id_next = 0;
186 static int highest_small_id = -1;
187 static MonoThread **small_id_table = NULL;
189 /* The hazard table */
190 #define HAZARD_TABLE_MAX_SIZE 16384 /* There cannot be more threads than this number. */
191 static volatile int hazard_table_size = 0;
192 static MonoThreadHazardPointers * volatile hazard_table = NULL;
194 /* The table where we keep pointers to blocks to be freed but that
195 have to wait because they're guarded by a hazard pointer. */
196 static CRITICAL_SECTION delayed_free_table_mutex;
197 static GArray *delayed_free_table = NULL;
199 static gboolean shutting_down = FALSE;
202 mono_thread_get_tls_key (void)
204 return current_object_key;
208 mono_thread_get_tls_offset (void)
211 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
215 /* handle_store() and handle_remove() manage the array of threads that
216 * still need to be waited for when the main thread exits.
218 * If handle_store() returns FALSE the thread must not be started
219 * because Mono is shutting down.
221 static gboolean handle_store(MonoThread *thread)
223 mono_threads_lock ();
225 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->tid));
227 if (threads_starting_up)
228 mono_g_hash_table_remove (threads_starting_up, thread);
231 mono_threads_unlock ();
236 MONO_GC_REGISTER_ROOT (threads);
237 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
240 /* We don't need to duplicate thread->handle, because it is
241 * only closed when the thread object is finalized by the GC.
243 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->tid),
246 mono_threads_unlock ();
251 static gboolean handle_remove(MonoThread *thread)
254 gsize tid = thread->tid;
256 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
258 mono_threads_lock ();
261 /* We have to check whether the thread object for the
262 * tid is still the same in the table because the
263 * thread might have been destroyed and the tid reused
264 * in the meantime, in which case the tid would be in
265 * the table, but with another thread object.
267 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
268 mono_g_hash_table_remove (threads, (gpointer)tid);
277 mono_threads_unlock ();
279 /* Don't close the handle here, wait for the object finalizer
280 * to do it. Otherwise, the following race condition applies:
282 * 1) Thread exits (and handle_remove() closes the handle)
284 * 2) Some other handle is reassigned the same slot
286 * 3) Another thread tries to join the first thread, and
287 * blocks waiting for the reassigned handle to be signalled
288 * (which might never happen). This is possible, because the
289 * thread calling Join() still has a reference to the first
296 * Allocate a small thread id.
298 * FIXME: The biggest part of this function is very similar to
299 * domain_id_alloc() in domain.c and should be merged.
302 small_id_alloc (MonoThread *thread)
306 EnterCriticalSection (&small_id_mutex);
308 if (!small_id_table) {
309 small_id_table_size = 2;
310 small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoThread*), NULL);
312 for (i = small_id_next; i < small_id_table_size; ++i) {
313 if (!small_id_table [i]) {
319 for (i = 0; i < small_id_next; ++i) {
320 if (!small_id_table [i]) {
327 MonoThread **new_table;
328 int new_size = small_id_table_size * 2;
329 if (new_size >= (1 << 16))
330 g_assert_not_reached ();
331 id = small_id_table_size;
332 new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoThread*), NULL);
333 memcpy (new_table, small_id_table, small_id_table_size * sizeof (void*));
334 mono_gc_free_fixed (small_id_table);
335 small_id_table = new_table;
336 small_id_table_size = new_size;
338 thread->small_id = id;
339 g_assert (small_id_table [id] == NULL);
340 small_id_table [id] = thread;
342 if (small_id_next > small_id_table_size)
345 if (id >= hazard_table_size) {
347 int pagesize = mono_pagesize ();
348 int num_pages = (hazard_table_size * sizeof (MonoThreadHazardPointers) + pagesize - 1) / pagesize;
350 if (hazard_table == NULL) {
351 hazard_table = mono_valloc (NULL,
352 sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE,
356 g_assert (hazard_table != NULL);
357 page_addr = (guint8*)hazard_table + num_pages * pagesize;
359 g_assert (id < HAZARD_TABLE_MAX_SIZE);
361 mono_mprotect (page_addr, pagesize, MONO_MMAP_READ | MONO_MMAP_WRITE);
364 hazard_table_size = num_pages * pagesize / sizeof (MonoThreadHazardPointers);
366 g_assert (id < hazard_table_size);
368 hazard_table [id].hazard_pointers [0] = NULL;
369 hazard_table [id].hazard_pointers [1] = NULL;
372 if (id > highest_small_id) {
373 highest_small_id = id;
374 mono_memory_write_barrier ();
377 LeaveCriticalSection (&small_id_mutex);
383 small_id_free (int id)
385 g_assert (id >= 0 && id < small_id_table_size);
386 g_assert (small_id_table [id] != NULL);
388 small_id_table [id] = NULL;
392 is_pointer_hazardous (gpointer p)
395 int highest = highest_small_id;
397 g_assert (highest < hazard_table_size);
399 for (i = 0; i <= highest; ++i) {
400 if (hazard_table [i].hazard_pointers [0] == p
401 || hazard_table [i].hazard_pointers [1] == p)
408 MonoThreadHazardPointers*
409 mono_hazard_pointer_get (void)
411 MonoThread *current_thread = mono_thread_current ();
413 if (!(current_thread && current_thread->small_id >= 0)) {
414 static MonoThreadHazardPointers emerg_hazard_table;
415 g_warning ("Thread %p may have been prematurely finalized", current_thread);
416 return &emerg_hazard_table;
419 return &hazard_table [current_thread->small_id];
423 try_free_delayed_free_item (int index)
425 if (delayed_free_table->len > index) {
426 DelayedFreeItem item = { NULL, NULL };
428 EnterCriticalSection (&delayed_free_table_mutex);
429 /* We have to check the length again because another
430 thread might have freed an item before we acquired
432 if (delayed_free_table->len > index) {
433 item = g_array_index (delayed_free_table, DelayedFreeItem, index);
435 if (!is_pointer_hazardous (item.p))
436 g_array_remove_index_fast (delayed_free_table, index);
440 LeaveCriticalSection (&delayed_free_table_mutex);
443 item.free_func (item.p);
448 mono_thread_hazardous_free_or_queue (gpointer p, MonoHazardousFreeFunc free_func)
452 /* First try to free a few entries in the delayed free
454 for (i = 2; i >= 0; --i)
455 try_free_delayed_free_item (i);
457 /* Now see if the pointer we're freeing is hazardous. If it
458 isn't, free it. Otherwise put it in the delay list. */
459 if (is_pointer_hazardous (p)) {
460 DelayedFreeItem item = { p, free_func };
462 ++mono_stats.hazardous_pointer_count;
464 EnterCriticalSection (&delayed_free_table_mutex);
465 g_array_append_val (delayed_free_table, item);
466 LeaveCriticalSection (&delayed_free_table_mutex);
472 mono_thread_hazardous_try_free_all (void)
477 if (!delayed_free_table)
480 len = delayed_free_table->len;
482 for (i = len - 1; i >= 0; --i)
483 try_free_delayed_free_item (i);
486 static void ensure_synch_cs_set (MonoThread *thread)
488 CRITICAL_SECTION *synch_cs;
490 if (thread->synch_cs != NULL) {
494 synch_cs = g_new0 (CRITICAL_SECTION, 1);
495 InitializeCriticalSection (synch_cs);
497 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
498 synch_cs, NULL) != NULL) {
499 /* Another thread must have installed this CS */
500 DeleteCriticalSection (synch_cs);
506 * NOTE: this function can be called also for threads different from the current one:
507 * make sure no code called from it will ever assume it is run on the thread that is
508 * getting cleaned up.
510 static void thread_cleanup (MonoThread *thread)
512 g_assert (thread != NULL);
514 /* if the thread is not in the hash it has been removed already */
515 if (!handle_remove (thread))
517 mono_release_type_locks (thread);
519 EnterCriticalSection (thread->synch_cs);
521 thread->state |= ThreadState_Stopped;
522 thread->state &= ~ThreadState_Background;
524 LeaveCriticalSection (thread->synch_cs);
526 mono_profiler_thread_end (thread->tid);
528 if (thread == mono_thread_current ())
529 mono_thread_pop_appdomain_ref ();
531 if (thread->serialized_culture_info)
532 g_free (thread->serialized_culture_info);
534 g_free (thread->name);
536 thread->cached_culture_info = NULL;
538 mono_gc_free_fixed (thread->static_data);
539 thread->static_data = NULL;
541 if (mono_thread_cleanup_fn)
542 mono_thread_cleanup_fn (thread);
544 small_id_free (thread->small_id);
545 thread->small_id = -2;
548 static guint32 WINAPI start_wrapper(void *data)
550 struct StartInfo *start_info=(struct StartInfo *)data;
551 guint32 (*start_func)(void *);
554 MonoThread *thread=start_info->obj;
555 MonoObject *start_delegate = start_info->delegate;
557 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
559 /* We can be sure start_info->obj->tid and
560 * start_info->obj->handle have been set, because the thread
561 * was created suspended, and these values were set before the
567 SET_CURRENT_OBJECT (thread);
569 mono_monitor_init_tls ();
571 /* Every thread references the appdomain which created it */
572 mono_thread_push_appdomain_ref (start_info->domain);
574 if (!mono_domain_set (start_info->domain, FALSE)) {
575 /* No point in raising an appdomain_unloaded exception here */
576 /* FIXME: Cleanup here */
577 mono_thread_pop_appdomain_ref ();
581 start_func = start_info->func;
582 start_arg = start_info->start_arg;
584 /* This MUST be called before any managed code can be
585 * executed, as it calls the callback function that (for the
586 * jit) sets the lmf marker.
588 mono_thread_new_init (tid, &tid, start_func);
589 thread->stack_ptr = &tid;
591 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
593 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
595 mono_profiler_thread_start (tid);
597 /* On 2.0 profile (and higher), set explicitly since state might have been
599 if (mono_framework_version () != 1) {
600 if (thread->apartment_state == ThreadApartmentState_Unknown)
601 thread->apartment_state = ThreadApartmentState_MTA;
604 mono_thread_init_apartment_state ();
606 if(thread->start_notify!=NULL) {
607 /* Let the thread that called Start() know we're
610 ReleaseSemaphore (thread->start_notify, 1, NULL);
613 MONO_GC_UNREGISTER_ROOT (start_info->start_arg);
616 thread_adjust_static_data (thread);
618 g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
622 /* start_func is set only for unmanaged start functions */
624 start_func (start_arg);
627 g_assert (start_delegate != NULL);
628 args [0] = start_arg;
629 /* we may want to handle the exception here. See comment below on unhandled exceptions */
630 mono_runtime_delegate_invoke (start_delegate, args, NULL);
633 /* If the thread calls ExitThread at all, this remaining code
634 * will not be executed, but the main thread will eventually
635 * call thread_cleanup() on this thread's behalf.
638 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
640 thread_cleanup (thread);
642 /* Do any cleanup needed for apartment state. This
643 * cannot be done in thread_cleanup since thread_cleanup could be
644 * called for a thread other than the current thread.
645 * mono_thread_cleanup_apartment_state cleans up apartment
646 * for the current thead */
647 mono_thread_cleanup_apartment_state ();
649 /* Remove the reference to the thread object in the TLS data,
650 * so the thread object can be finalized. This won't be
651 * reached if the thread threw an uncaught exception, so those
652 * thread handles will stay referenced :-( (This is due to
653 * missing support for scanning thread-specific data in the
654 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
657 SET_CURRENT_OBJECT (NULL);
662 void mono_thread_new_init (gsize tid, gpointer stack_start, gpointer func)
664 if (mono_thread_start_cb) {
665 mono_thread_start_cb (tid, stack_start, func);
669 void mono_threads_set_default_stacksize (guint32 stacksize)
671 default_stacksize = stacksize;
674 guint32 mono_threads_get_default_stacksize (void)
676 return default_stacksize;
680 * mono_create_thread:
682 * This is a wrapper around CreateThread which handles differences in the type of
683 * the the 'tid' argument.
685 gpointer mono_create_thread (WapiSecurityAttributes *security,
686 guint32 stacksize, WapiThreadStart start,
687 gpointer param, guint32 create, gsize *tid)
691 #ifdef PLATFORM_WIN32
694 res = CreateThread (security, stacksize, start, param, create, &real_tid);
698 res = CreateThread (security, stacksize, start, param, create, tid);
704 void mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread)
707 HANDLE thread_handle;
708 struct StartInfo *start_info;
711 thread=(MonoThread *)mono_object_new (domain,
712 mono_defaults.thread_class);
714 start_info=g_new0 (struct StartInfo, 1);
715 start_info->func = func;
716 start_info->obj = thread;
717 start_info->domain = domain;
718 start_info->start_arg = arg;
721 * The argument may be an object reference, and there is no ref to keep it alive
722 * when the new thread is started but not yet registered with the collector.
724 MONO_GC_REGISTER_ROOT (start_info->start_arg);
726 mono_threads_lock ();
728 mono_threads_unlock ();
731 if (threads_starting_up == NULL) {
732 MONO_GC_REGISTER_ROOT (threads_starting_up);
733 threads_starting_up = mono_g_hash_table_new (NULL, NULL);
735 mono_g_hash_table_insert (threads_starting_up, thread, thread);
736 mono_threads_unlock ();
738 /* Create suspended, so we can do some housekeeping before the thread
741 thread_handle = mono_create_thread (NULL, default_stacksize_for_thread (thread), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
742 CREATE_SUSPENDED, &tid);
743 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
744 if (thread_handle == NULL) {
745 /* The thread couldn't be created, so throw an exception */
746 MONO_GC_UNREGISTER_ROOT (start_info->start_arg);
747 mono_threads_lock ();
748 mono_g_hash_table_remove (threads_starting_up, thread);
749 mono_threads_unlock ();
751 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
755 thread->handle=thread_handle;
757 thread->apartment_state=ThreadApartmentState_Unknown;
758 small_id_alloc (thread);
760 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
761 InitializeCriticalSection (thread->synch_cs);
763 thread->threadpool_thread = threadpool_thread;
764 if (threadpool_thread)
765 mono_thread_set_state (thread, ThreadState_Background);
767 if (handle_store (thread))
768 ResumeThread (thread_handle);
772 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
774 mono_thread_create_internal (domain, func, arg, FALSE);
778 * mono_thread_get_stack_bounds:
780 * Return the address and size of the current threads stack. Return NULL as the
781 * stack address if the stack address cannot be determined.
784 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
786 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
787 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
788 *stsize = pthread_get_stacksize_np (pthread_self ());
789 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
791 /* FIXME: simplify the mess below */
792 #elif !defined(PLATFORM_WIN32)
794 guint8 *current = (guint8*)&attr;
796 pthread_attr_init (&attr);
797 #ifdef HAVE_PTHREAD_GETATTR_NP
798 pthread_getattr_np (pthread_self(), &attr);
800 #ifdef HAVE_PTHREAD_ATTR_GET_NP
801 pthread_attr_get_np (pthread_self(), &attr);
804 pthread_attr_getstacksize (&attr, &stsize);
813 pthread_attr_getstack (&attr, (void**)staddr, stsize);
815 g_assert ((current > *staddr) && (current < *staddr + *stsize));
818 pthread_attr_destroy (&attr);
821 /* When running under emacs, sometimes staddr is not aligned to a page size */
822 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
826 mono_thread_attach (MonoDomain *domain)
829 HANDLE thread_handle;
832 if ((thread = mono_thread_current ())) {
833 if (domain != mono_domain_get ())
834 mono_domain_set (domain, TRUE);
835 /* Already attached */
839 if (!mono_gc_register_thread (&domain)) {
840 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 ());
843 thread = (MonoThread *)mono_object_new (domain,
844 mono_defaults.thread_class);
846 thread_handle = GetCurrentThread ();
847 g_assert (thread_handle);
849 tid=GetCurrentThreadId ();
852 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
853 * refer to the thread from other threads for things like aborting.
855 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
856 THREAD_ALL_ACCESS, TRUE, 0);
858 thread->handle=thread_handle;
860 thread->apartment_state=ThreadApartmentState_Unknown;
861 small_id_alloc (thread);
862 thread->stack_ptr = &tid;
864 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
865 InitializeCriticalSection (thread->synch_cs);
867 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
869 if (!handle_store (thread)) {
870 /* Mono is shutting down, so just wait for the end */
875 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
877 SET_CURRENT_OBJECT (thread);
878 mono_domain_set (domain, TRUE);
880 mono_monitor_init_tls ();
882 thread_adjust_static_data (thread);
884 if (mono_thread_attach_cb) {
888 mono_thread_get_stack_bounds (&staddr, &stsize);
891 mono_thread_attach_cb (tid, &tid);
893 mono_thread_attach_cb (tid, staddr + stsize);
900 mono_thread_detach (MonoThread *thread)
902 g_return_if_fail (thread != NULL);
904 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
906 thread_cleanup (thread);
908 SET_CURRENT_OBJECT (NULL);
910 /* Don't need to CloseHandle this thread, even though we took a
911 * reference in mono_thread_attach (), because the GC will do it
912 * when the Thread object is finalised.
919 MonoThread *thread = mono_thread_current ();
921 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
923 thread_cleanup (thread);
924 SET_CURRENT_OBJECT (NULL);
926 /* we could add a callback here for embedders to use. */
927 if (thread == mono_thread_get_main ())
928 exit (mono_environment_exitcode_get ());
932 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
935 guint32 (*start_func)(void *);
936 struct StartInfo *start_info;
942 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
944 ensure_synch_cs_set (this);
946 EnterCriticalSection (this->synch_cs);
948 if ((this->state & ThreadState_Unstarted) == 0) {
949 LeaveCriticalSection (this->synch_cs);
950 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
956 if ((this->state & ThreadState_Aborted) != 0) {
957 LeaveCriticalSection (this->synch_cs);
962 /* This is freed in start_wrapper */
963 start_info = g_new0 (struct StartInfo, 1);
964 start_info->func = start_func;
965 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
966 start_info->delegate = start;
967 start_info->obj = this;
968 start_info->domain = mono_domain_get ();
970 this->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
971 if(this->start_notify==NULL) {
972 LeaveCriticalSection (this->synch_cs);
973 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
977 mono_threads_lock ();
978 if (threads_starting_up == NULL) {
979 MONO_GC_REGISTER_ROOT (threads_starting_up);
980 threads_starting_up = mono_g_hash_table_new (NULL, NULL);
982 mono_g_hash_table_insert (threads_starting_up, this, this);
983 mono_threads_unlock ();
985 thread=mono_create_thread(NULL, default_stacksize_for_thread (this), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
986 CREATE_SUSPENDED, &tid);
988 LeaveCriticalSection (this->synch_cs);
989 mono_threads_lock ();
990 mono_g_hash_table_remove (threads_starting_up, this);
991 mono_threads_unlock ();
992 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
998 small_id_alloc (this);
1000 /* Don't call handle_store() here, delay it to Start.
1001 * We can't join a thread (trying to will just block
1002 * forever) until it actually starts running, so don't
1003 * store the handle till then.
1006 mono_thread_start (this);
1008 this->state &= ~ThreadState_Unstarted;
1010 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1012 LeaveCriticalSection (this->synch_cs);
1017 void ves_icall_System_Threading_Thread_Thread_init (MonoThread *this)
1019 MONO_ARCH_SAVE_REGS;
1021 ensure_synch_cs_set (this);
1024 void ves_icall_System_Threading_Thread_Thread_free_internal (MonoThread *this,
1027 MONO_ARCH_SAVE_REGS;
1029 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1031 CloseHandle (thread);
1033 DeleteCriticalSection (this->synch_cs);
1034 g_free (this->synch_cs);
1035 this->synch_cs = NULL;
1038 static void mono_thread_start (MonoThread *thread)
1040 MONO_ARCH_SAVE_REGS;
1042 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1044 /* Only store the handle when the thread is about to be
1045 * launched, to avoid the main thread deadlocking while trying
1046 * to clean up a thread that will never be signalled.
1048 if (!handle_store (thread))
1051 ResumeThread (thread->handle);
1053 if(thread->start_notify!=NULL) {
1054 /* Wait for the thread to set up its TLS data etc, so
1055 * theres no potential race condition if someone tries
1056 * to look up the data believing the thread has
1060 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1062 WaitForSingleObjectEx (thread->start_notify, INFINITE, FALSE);
1063 CloseHandle (thread->start_notify);
1064 thread->start_notify = NULL;
1067 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1070 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1072 MonoThread *thread = mono_thread_current ();
1074 MONO_ARCH_SAVE_REGS;
1076 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1078 mono_thread_current_check_pending_interrupt ();
1080 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1084 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1087 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1092 ves_icall_System_Threading_Thread_GetDomainID (void)
1094 MONO_ARCH_SAVE_REGS;
1096 return mono_domain_get()->domain_id;
1100 ves_icall_System_Threading_Thread_GetName_internal (MonoThread *this_obj)
1104 ensure_synch_cs_set (this_obj);
1106 EnterCriticalSection (this_obj->synch_cs);
1108 if (!this_obj->name)
1111 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1113 LeaveCriticalSection (this_obj->synch_cs);
1119 ves_icall_System_Threading_Thread_SetName_internal (MonoThread *this_obj, MonoString *name)
1121 ensure_synch_cs_set (this_obj);
1123 EnterCriticalSection (this_obj->synch_cs);
1125 if (this_obj->name) {
1126 LeaveCriticalSection (this_obj->synch_cs);
1128 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1132 this_obj->name = g_new (gunichar2, mono_string_length (name));
1133 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1134 this_obj->name_len = mono_string_length (name);
1137 this_obj->name = NULL;
1139 LeaveCriticalSection (this_obj->synch_cs);
1143 lookup_cached_culture (MonoThread *this, MonoDomain *domain, int start_idx)
1148 if (this->cached_culture_info) {
1149 domain = mono_domain_get ();
1150 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1151 res = mono_array_get (this->cached_culture_info, MonoObject*, i);
1152 if (res && res->vtable->domain == domain)
1161 ves_icall_System_Threading_Thread_GetCachedCurrentCulture (MonoThread *this)
1163 return lookup_cached_culture (this, mono_domain_get (), CULTURES_START_IDX);
1167 ves_icall_System_Threading_Thread_GetSerializedCurrentCulture (MonoThread *this)
1171 ensure_synch_cs_set (this);
1173 EnterCriticalSection (this->synch_cs);
1175 if (this->serialized_culture_info) {
1176 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_culture_info_len);
1177 memcpy (mono_array_addr (res, guint8, 0), this->serialized_culture_info, this->serialized_culture_info_len);
1182 LeaveCriticalSection (this->synch_cs);
1188 cache_culture (MonoThread *this, MonoObject *culture, int start_idx)
1191 MonoDomain *domain = mono_domain_get ();
1194 int same_domain_slot = -1;
1196 ensure_synch_cs_set (this);
1198 EnterCriticalSection (this->synch_cs);
1200 if (!this->cached_culture_info)
1201 MONO_OBJECT_SETREF (this, cached_culture_info, mono_array_new_cached (mono_object_domain (this), mono_defaults.object_class, NUM_CACHED_CULTURES * 2));
1203 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1204 obj = mono_array_get (this->cached_culture_info, MonoObject*, i);
1208 /* we continue, because there may be a slot used with the same domain */
1212 if (obj->vtable->domain == domain) {
1213 same_domain_slot = i;
1217 if (same_domain_slot >= 0)
1218 mono_array_setref (this->cached_culture_info, same_domain_slot, culture);
1219 else if (free_slot >= 0)
1220 mono_array_setref (this->cached_culture_info, free_slot, culture);
1221 /* we may want to replace an existing entry here, even when no suitable slot is found */
1223 LeaveCriticalSection (this->synch_cs);
1227 ves_icall_System_Threading_Thread_SetCachedCurrentCulture (MonoThread *this, MonoObject *culture)
1229 cache_culture (this, culture, CULTURES_START_IDX);
1233 ves_icall_System_Threading_Thread_SetSerializedCurrentCulture (MonoThread *this, MonoArray *arr)
1235 ensure_synch_cs_set (this);
1237 EnterCriticalSection (this->synch_cs);
1239 if (this->serialized_culture_info)
1240 g_free (this->serialized_culture_info);
1241 this->serialized_culture_info = g_new0 (guint8, mono_array_length (arr));
1242 this->serialized_culture_info_len = mono_array_length (arr);
1243 memcpy (this->serialized_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1245 LeaveCriticalSection (this->synch_cs);
1250 ves_icall_System_Threading_Thread_GetCachedCurrentUICulture (MonoThread *this)
1252 return lookup_cached_culture (this, mono_domain_get (), UICULTURES_START_IDX);
1256 ves_icall_System_Threading_Thread_GetSerializedCurrentUICulture (MonoThread *this)
1260 ensure_synch_cs_set (this);
1262 EnterCriticalSection (this->synch_cs);
1264 if (this->serialized_ui_culture_info) {
1265 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_ui_culture_info_len);
1266 memcpy (mono_array_addr (res, guint8, 0), this->serialized_ui_culture_info, this->serialized_ui_culture_info_len);
1271 LeaveCriticalSection (this->synch_cs);
1277 ves_icall_System_Threading_Thread_SetCachedCurrentUICulture (MonoThread *this, MonoObject *culture)
1279 cache_culture (this, culture, UICULTURES_START_IDX);
1283 ves_icall_System_Threading_Thread_SetSerializedCurrentUICulture (MonoThread *this, MonoArray *arr)
1285 ensure_synch_cs_set (this);
1287 EnterCriticalSection (this->synch_cs);
1289 if (this->serialized_ui_culture_info)
1290 g_free (this->serialized_ui_culture_info);
1291 this->serialized_ui_culture_info = g_new0 (guint8, mono_array_length (arr));
1292 this->serialized_ui_culture_info_len = mono_array_length (arr);
1293 memcpy (this->serialized_ui_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1295 LeaveCriticalSection (this->synch_cs);
1298 /* the jit may read the compiled code of this function */
1300 mono_thread_current (void)
1302 MonoThread *res = GET_CURRENT_OBJECT ()
1303 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1307 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoThread *this,
1308 int ms, HANDLE thread)
1310 MonoThread *cur_thread = mono_thread_current ();
1313 MONO_ARCH_SAVE_REGS;
1315 mono_thread_current_check_pending_interrupt ();
1317 ensure_synch_cs_set (this);
1319 EnterCriticalSection (this->synch_cs);
1321 if ((this->state & ThreadState_Unstarted) != 0) {
1322 LeaveCriticalSection (this->synch_cs);
1324 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1328 LeaveCriticalSection (this->synch_cs);
1333 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1335 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1337 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1339 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1341 if(ret==WAIT_OBJECT_0) {
1342 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1347 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1352 /* FIXME: exitContext isnt documented */
1353 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1359 MonoObject *waitHandle;
1360 MonoThread *thread = mono_thread_current ();
1362 MONO_ARCH_SAVE_REGS;
1364 /* Do this WaitSleepJoin check before creating objects */
1365 mono_thread_current_check_pending_interrupt ();
1367 numhandles = mono_array_length(mono_handles);
1368 handles = g_new0(HANDLE, numhandles);
1370 for(i = 0; i < numhandles; i++) {
1371 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1372 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1379 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1381 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1383 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1387 if(ret==WAIT_FAILED) {
1388 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1390 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1391 /* Do we want to try again if we get
1392 * WAIT_IO_COMPLETION? The documentation for
1393 * WaitHandle doesn't give any clues. (We'd have to
1394 * fiddle with the timeout if we retry.)
1396 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1403 /* FIXME: exitContext isnt documented */
1404 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_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, FALSE, ms, TRUE);
1434 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1438 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1441 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1443 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1444 return ret - WAIT_OBJECT_0;
1446 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1447 return ret - WAIT_ABANDONED_0;
1454 /* FIXME: exitContext isnt documented */
1455 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1458 MonoThread *thread = mono_thread_current ();
1460 MONO_ARCH_SAVE_REGS;
1462 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1468 mono_thread_current_check_pending_interrupt ();
1470 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1472 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1474 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1476 if(ret==WAIT_FAILED) {
1477 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1479 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1480 /* Do we want to try again if we get
1481 * WAIT_IO_COMPLETION? The documentation for
1482 * WaitHandle doesn't give any clues. (We'd have to
1483 * fiddle with the timeout if we retry.)
1485 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1493 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1496 MonoThread *thread = mono_thread_current ();
1498 MONO_ARCH_SAVE_REGS;
1503 mono_thread_current_check_pending_interrupt ();
1505 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1507 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1509 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1511 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1514 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1518 MONO_ARCH_SAVE_REGS;
1523 mutex = CreateMutex (NULL, owned, NULL);
1525 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1527 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1535 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1536 MONO_ARCH_SAVE_REGS;
1538 return(ReleaseMutex (handle));
1541 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1547 MONO_ARCH_SAVE_REGS;
1549 *error = ERROR_SUCCESS;
1551 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1553 *error = GetLastError ();
1560 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1564 MONO_ARCH_SAVE_REGS;
1569 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1571 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1572 mono_string_chars (name));
1574 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1582 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1586 MONO_ARCH_SAVE_REGS;
1588 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1593 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1597 MONO_ARCH_SAVE_REGS;
1599 *error = ERROR_SUCCESS;
1601 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1603 *error = GetLastError ();
1609 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1613 MONO_ARCH_SAVE_REGS;
1618 event = CreateEvent (NULL, manual, initial, NULL);
1620 event = CreateEvent (NULL, manual, initial,
1621 mono_string_chars (name));
1623 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1631 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1632 MONO_ARCH_SAVE_REGS;
1634 return (SetEvent(handle));
1637 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1638 MONO_ARCH_SAVE_REGS;
1640 return (ResetEvent(handle));
1644 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1645 MONO_ARCH_SAVE_REGS;
1647 CloseHandle (handle);
1650 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1656 MONO_ARCH_SAVE_REGS;
1658 *error = ERROR_SUCCESS;
1660 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1662 *error = GetLastError ();
1668 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1670 MONO_ARCH_SAVE_REGS;
1672 return InterlockedIncrement (location);
1675 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1679 MONO_ARCH_SAVE_REGS;
1681 mono_interlocked_lock ();
1685 mono_interlocked_unlock ();
1691 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1693 MONO_ARCH_SAVE_REGS;
1695 return InterlockedDecrement(location);
1698 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1702 MONO_ARCH_SAVE_REGS;
1704 mono_interlocked_lock ();
1708 mono_interlocked_unlock ();
1713 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1715 MONO_ARCH_SAVE_REGS;
1717 return InterlockedExchange(location, value);
1720 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1722 MONO_ARCH_SAVE_REGS;
1724 return (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1727 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1729 IntFloatUnion val, ret;
1731 MONO_ARCH_SAVE_REGS;
1734 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1740 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1742 #if SIZEOF_VOID_P == 8
1743 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1748 * According to MSDN, this function is only atomic with regards to the
1749 * other Interlocked functions on 32 bit platforms.
1751 mono_interlocked_lock ();
1754 mono_interlocked_unlock ();
1761 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1763 #if SIZEOF_VOID_P == 8
1764 LongDoubleUnion val, ret;
1767 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1774 * According to MSDN, this function is only atomic with regards to the
1775 * other Interlocked functions on 32 bit platforms.
1777 mono_interlocked_lock ();
1780 mono_interlocked_unlock ();
1786 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1788 MONO_ARCH_SAVE_REGS;
1790 return InterlockedCompareExchange(location, value, comparand);
1793 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1795 MONO_ARCH_SAVE_REGS;
1797 return (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1800 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1802 IntFloatUnion val, ret, cmp;
1804 MONO_ARCH_SAVE_REGS;
1807 cmp.fval = comparand;
1808 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1814 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1816 #if SIZEOF_VOID_P == 8
1817 LongDoubleUnion val, comp, ret;
1820 comp.fval = comparand;
1821 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1827 mono_interlocked_lock ();
1829 if (old == comparand)
1831 mono_interlocked_unlock ();
1838 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1840 #if SIZEOF_VOID_P == 8
1841 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1845 mono_interlocked_lock ();
1847 if (old == comparand)
1849 mono_interlocked_unlock ();
1856 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1858 MONO_ARCH_SAVE_REGS;
1860 return InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1864 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1866 MONO_ARCH_SAVE_REGS;
1868 return InterlockedExchangePointer ((gpointer *)location, value);
1872 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1874 #if SIZEOF_VOID_P == 8
1875 /* Should be implemented as a JIT intrinsic */
1876 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1881 mono_interlocked_lock ();
1883 *location = orig + value;
1884 mono_interlocked_unlock ();
1886 return orig + value;
1891 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1893 #if SIZEOF_VOID_P == 8
1894 /* Should be implemented as a JIT intrinsic */
1895 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1900 mono_interlocked_lock ();
1902 *location = orig + value;
1903 mono_interlocked_unlock ();
1905 return orig + value;
1910 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1912 #if SIZEOF_VOID_P == 8
1913 /* 64 bit reads are already atomic */
1918 mono_interlocked_lock ();
1920 mono_interlocked_unlock ();
1927 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1929 mono_threads_lock ();
1930 mono_threads_unlock ();
1934 ves_icall_System_Threading_Thread_ClrState (MonoThread* this, guint32 state)
1936 mono_thread_clr_state (this, state);
1938 if (state & ThreadState_Background) {
1939 /* If the thread changes the background mode, the main thread has to
1940 * be notified, since it has to rebuild the list of threads to
1943 SetEvent (background_change_event);
1948 ves_icall_System_Threading_Thread_SetState (MonoThread* this, guint32 state)
1950 mono_thread_set_state (this, state);
1952 if (state & ThreadState_Background) {
1953 /* If the thread changes the background mode, the main thread has to
1954 * be notified, since it has to rebuild the list of threads to
1957 SetEvent (background_change_event);
1962 ves_icall_System_Threading_Thread_GetState (MonoThread* this)
1966 ensure_synch_cs_set (this);
1968 EnterCriticalSection (this->synch_cs);
1970 state = this->state;
1972 LeaveCriticalSection (this->synch_cs);
1977 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this)
1979 gboolean throw = FALSE;
1981 ensure_synch_cs_set (this);
1983 if (this == mono_thread_current ())
1986 EnterCriticalSection (this->synch_cs);
1988 this->thread_interrupt_requested = TRUE;
1990 if (this->state & ThreadState_WaitSleepJoin) {
1994 LeaveCriticalSection (this->synch_cs);
1997 signal_thread_state_change (this);
2001 void mono_thread_current_check_pending_interrupt ()
2003 MonoThread *thread = mono_thread_current ();
2004 gboolean throw = FALSE;
2006 mono_debugger_check_interruption ();
2008 ensure_synch_cs_set (thread);
2010 EnterCriticalSection (thread->synch_cs);
2012 if (thread->thread_interrupt_requested) {
2014 thread->thread_interrupt_requested = FALSE;
2017 LeaveCriticalSection (thread->synch_cs);
2020 mono_raise_exception (mono_get_exception_thread_interrupted ());
2025 mono_thread_get_abort_signal (void)
2027 #ifdef PLATFORM_WIN32
2037 static int abort_signum = -1;
2039 if (abort_signum != -1)
2040 return abort_signum;
2041 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2042 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2043 struct sigaction sinfo;
2044 sigaction (i, NULL, &sinfo);
2045 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2050 /* fallback to the old way */
2053 #endif /* PLATFORM_WIN32 */
2056 #ifdef PLATFORM_WIN32
2057 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2059 MonoException* exc = mono_thread_request_interruption (FALSE);
2060 if (exc) mono_raise_exception (exc);
2062 #endif /* PLATFORM_WIN32 */
2065 * signal_thread_state_change
2067 * Tells the thread that his state has changed and it has to enter the new
2068 * state as soon as possible.
2070 static void signal_thread_state_change (MonoThread *thread)
2072 if (thread == mono_thread_current ()) {
2073 /* Do it synchronously */
2074 MonoException *exc = mono_thread_request_interruption (FALSE);
2076 mono_raise_exception (exc);
2079 #ifdef PLATFORM_WIN32
2080 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2082 /* fixme: store the state somewhere */
2083 #ifdef PTHREAD_POINTER_ID
2084 pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
2086 pthread_kill (thread->tid, mono_thread_get_abort_signal ());
2090 * This will cause waits to be broken.
2091 * It will also prevent the thread from entering a wait, so if the thread returns
2092 * from the wait before it receives the abort signal, it will just spin in the wait
2093 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2096 wapi_interrupt_thread (thread->handle);
2097 #endif /* PLATFORM_WIN32 */
2101 ves_icall_System_Threading_Thread_Abort (MonoThread *thread, MonoObject *state)
2103 MONO_ARCH_SAVE_REGS;
2105 ensure_synch_cs_set (thread);
2107 EnterCriticalSection (thread->synch_cs);
2109 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2110 (thread->state & ThreadState_StopRequested) != 0 ||
2111 (thread->state & ThreadState_Stopped) != 0)
2113 LeaveCriticalSection (thread->synch_cs);
2117 if ((thread->state & ThreadState_Unstarted) != 0) {
2118 thread->state |= ThreadState_Aborted;
2119 LeaveCriticalSection (thread->synch_cs);
2123 thread->state |= ThreadState_AbortRequested;
2124 MONO_OBJECT_SETREF (thread, abort_state, state);
2125 thread->abort_exc = NULL;
2127 LeaveCriticalSection (thread->synch_cs);
2129 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2131 /* During shutdown, we can't wait for other threads */
2133 /* Make sure the thread is awake */
2134 mono_thread_resume (thread);
2136 signal_thread_state_change (thread);
2140 ves_icall_System_Threading_Thread_ResetAbort (void)
2142 MonoThread *thread = mono_thread_current ();
2144 MONO_ARCH_SAVE_REGS;
2146 ensure_synch_cs_set (thread);
2148 EnterCriticalSection (thread->synch_cs);
2150 thread->state &= ~ThreadState_AbortRequested;
2152 if (!thread->abort_exc) {
2153 const char *msg = "Unable to reset abort because no abort was requested";
2154 LeaveCriticalSection (thread->synch_cs);
2155 mono_raise_exception (mono_get_exception_thread_state (msg));
2157 thread->abort_exc = NULL;
2158 thread->abort_state = NULL;
2161 LeaveCriticalSection (thread->synch_cs);
2165 mono_thread_suspend (MonoThread *thread)
2167 MONO_ARCH_SAVE_REGS;
2169 ensure_synch_cs_set (thread);
2171 EnterCriticalSection (thread->synch_cs);
2173 if ((thread->state & ThreadState_Unstarted) != 0 ||
2174 (thread->state & ThreadState_Aborted) != 0 ||
2175 (thread->state & ThreadState_Stopped) != 0)
2177 LeaveCriticalSection (thread->synch_cs);
2181 if ((thread->state & ThreadState_Suspended) != 0 ||
2182 (thread->state & ThreadState_SuspendRequested) != 0 ||
2183 (thread->state & ThreadState_StopRequested) != 0)
2185 LeaveCriticalSection (thread->synch_cs);
2189 thread->state |= ThreadState_SuspendRequested;
2191 LeaveCriticalSection (thread->synch_cs);
2193 signal_thread_state_change (thread);
2198 ves_icall_System_Threading_Thread_Suspend (MonoThread *thread)
2200 if (!mono_thread_suspend (thread))
2201 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2205 mono_thread_resume (MonoThread *thread)
2207 MONO_ARCH_SAVE_REGS;
2209 ensure_synch_cs_set (thread);
2211 EnterCriticalSection (thread->synch_cs);
2213 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2214 thread->state &= ~ThreadState_SuspendRequested;
2215 LeaveCriticalSection (thread->synch_cs);
2219 if ((thread->state & ThreadState_Suspended) == 0 ||
2220 (thread->state & ThreadState_Unstarted) != 0 ||
2221 (thread->state & ThreadState_Aborted) != 0 ||
2222 (thread->state & ThreadState_Stopped) != 0)
2224 LeaveCriticalSection (thread->synch_cs);
2228 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2229 if (thread->resume_event == NULL) {
2230 LeaveCriticalSection (thread->synch_cs);
2234 /* Awake the thread */
2235 SetEvent (thread->suspend_event);
2237 LeaveCriticalSection (thread->synch_cs);
2239 /* Wait for the thread to awake */
2240 WaitForSingleObject (thread->resume_event, INFINITE);
2241 CloseHandle (thread->resume_event);
2242 thread->resume_event = NULL;
2248 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2250 if (!mono_thread_resume (thread))
2251 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2255 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2260 if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
2261 m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
2262 m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
2264 *((gboolean*)data) = TRUE;
2271 is_running_protected_wrapper (void)
2273 gboolean found = FALSE;
2274 mono_stack_walk (find_wrapper, &found);
2278 void mono_thread_stop (MonoThread *thread)
2280 ensure_synch_cs_set (thread);
2282 EnterCriticalSection (thread->synch_cs);
2284 if ((thread->state & ThreadState_StopRequested) != 0 ||
2285 (thread->state & ThreadState_Stopped) != 0)
2287 LeaveCriticalSection (thread->synch_cs);
2291 /* Make sure the thread is awake */
2292 mono_thread_resume (thread);
2294 thread->state |= ThreadState_StopRequested;
2295 thread->state &= ~ThreadState_AbortRequested;
2297 LeaveCriticalSection (thread->synch_cs);
2299 signal_thread_state_change (thread);
2303 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2305 return *((volatile gint8 *) (ptr));
2309 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2311 return *((volatile gint16 *) (ptr));
2315 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2317 return *((volatile gint32 *) (ptr));
2321 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2323 return *((volatile gint64 *) (ptr));
2327 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2329 return (void *) *((volatile void **) ptr);
2333 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2335 *((volatile gint8 *) ptr) = value;
2339 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2341 *((volatile gint16 *) ptr) = value;
2345 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2347 *((volatile gint32 *) ptr) = value;
2351 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2353 *((volatile gint64 *) ptr) = value;
2357 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2359 *((volatile void **) ptr) = value;
2362 void mono_thread_init (MonoThreadStartCB start_cb,
2363 MonoThreadAttachCB attach_cb)
2365 MONO_GC_REGISTER_ROOT (small_id_table);
2366 InitializeCriticalSection(&threads_mutex);
2367 InitializeCriticalSection(&interlocked_mutex);
2368 InitializeCriticalSection(&contexts_mutex);
2369 InitializeCriticalSection(&delayed_free_table_mutex);
2370 InitializeCriticalSection(&small_id_mutex);
2372 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2373 g_assert(background_change_event != NULL);
2375 mono_init_static_data_info (&thread_static_info);
2376 mono_init_static_data_info (&context_static_info);
2378 current_object_key=TlsAlloc();
2379 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2381 mono_thread_start_cb = start_cb;
2382 mono_thread_attach_cb = attach_cb;
2384 delayed_free_table = g_array_new (FALSE, FALSE, sizeof (DelayedFreeItem));
2386 /* Get a pseudo handle to the current process. This is just a
2387 * kludge so that wapi can build a process handle if needed.
2388 * As a pseudo handle is returned, we don't need to clean
2391 GetCurrentProcess ();
2394 void mono_thread_cleanup (void)
2396 mono_thread_hazardous_try_free_all ();
2398 #if !defined(PLATFORM_WIN32) && !defined(RUN_IN_SUBTHREAD)
2399 /* The main thread must abandon any held mutexes (particularly
2400 * important for named mutexes as they are shared across
2401 * processes, see bug 74680.) This will happen when the
2402 * thread exits, but if it's not running in a subthread it
2403 * won't exit in time.
2405 /* Using non-w32 API is a nasty kludge, but I couldn't find
2406 * anything in the documentation that would let me do this
2407 * here yet still be safe to call on windows.
2409 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2413 /* This stuff needs more testing, it seems one of these
2414 * critical sections can be locked when mono_thread_cleanup is
2417 DeleteCriticalSection (&threads_mutex);
2418 DeleteCriticalSection (&interlocked_mutex);
2419 DeleteCriticalSection (&contexts_mutex);
2420 DeleteCriticalSection (&delayed_free_table_mutex);
2421 DeleteCriticalSection (&small_id_mutex);
2422 CloseHandle (background_change_event);
2425 g_array_free (delayed_free_table, TRUE);
2426 delayed_free_table = NULL;
2428 TlsFree (current_object_key);
2432 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2434 mono_thread_cleanup_fn = func;
2438 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2440 thread->manage_callback = func;
2443 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2445 mono_thread_notify_pending_exc_fn = func;
2449 static void print_tids (gpointer key, gpointer value, gpointer user)
2451 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2452 * sizeof(uint) and a cast to uint would overflow
2454 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2455 * print this as a pointer.
2457 g_message ("Waiting for: %p", key);
2462 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2463 MonoThread *threads[MAXIMUM_WAIT_OBJECTS];
2467 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2471 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2473 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, FALSE);
2475 if(ret==WAIT_FAILED) {
2476 /* See the comment in build_wait_tids() */
2477 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2481 for(i=0; i<wait->num; i++)
2482 CloseHandle (wait->handles[i]);
2484 if (ret == WAIT_TIMEOUT)
2487 for(i=0; i<wait->num; i++) {
2488 gsize tid = wait->threads[i]->tid;
2490 mono_threads_lock ();
2491 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2492 /* This thread must have been killed, because
2493 * it hasn't cleaned itself up. (It's just
2494 * possible that the thread exited before the
2495 * parent thread had a chance to store the
2496 * handle, and now there is another pointer to
2497 * the already-exited thread stored. In this
2498 * case, we'll just get two
2499 * mono_profiler_thread_end() calls for the
2503 mono_threads_unlock ();
2504 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2505 thread_cleanup (wait->threads[i]);
2507 mono_threads_unlock ();
2512 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2514 guint32 i, ret, count;
2516 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2518 /* Add the thread state change event, so it wakes up if a thread changes
2519 * to background mode.
2522 if (count < MAXIMUM_WAIT_OBJECTS) {
2523 wait->handles [count] = background_change_event;
2527 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, FALSE);
2529 if(ret==WAIT_FAILED) {
2530 /* See the comment in build_wait_tids() */
2531 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2535 for(i=0; i<wait->num; i++)
2536 CloseHandle (wait->handles[i]);
2538 if (ret == WAIT_TIMEOUT)
2541 if (ret < wait->num) {
2542 gsize tid = wait->threads[ret]->tid;
2543 mono_threads_lock ();
2544 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2545 /* See comment in wait_for_tids about thread cleanup */
2546 mono_threads_unlock ();
2547 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2548 thread_cleanup (wait->threads [ret]);
2550 mono_threads_unlock ();
2554 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2556 struct wait_data *wait=(struct wait_data *)user;
2558 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2560 MonoThread *thread=(MonoThread *)value;
2562 /* Ignore background threads, we abort them later */
2563 /* Do not lock here since it is not needed and the caller holds threads_lock */
2564 if (thread->state & ThreadState_Background) {
2565 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2566 return; /* just leave, ignore */
2569 if (mono_gc_is_finalizer_thread (thread)) {
2570 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2574 if (thread == mono_thread_current ()) {
2575 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2579 if (thread == mono_thread_get_main ()) {
2580 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2584 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2585 if (handle == NULL) {
2586 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2590 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2591 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread) == TRUE)) {
2592 wait->handles[wait->num]=handle;
2593 wait->threads[wait->num]=thread;
2596 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2598 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2603 /* Just ignore the rest, we can't do anything with
2610 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2612 struct wait_data *wait=(struct wait_data *)user;
2613 gsize self = GetCurrentThreadId ();
2614 MonoThread *thread = (MonoThread *) value;
2617 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2620 /* The finalizer thread is not a background thread */
2621 if (thread->tid != self && (thread->state & ThreadState_Background) != 0) {
2623 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2627 /* printf ("A: %d\n", wait->num); */
2628 wait->handles[wait->num]=thread->handle;
2629 wait->threads[wait->num]=thread;
2632 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2633 mono_thread_stop (thread);
2637 return (thread->tid != self && !mono_gc_is_finalizer_thread (thread));
2640 static MonoException* mono_thread_execute_interruption (MonoThread *thread);
2643 * mono_threads_set_shutting_down:
2645 * Is called by a thread that wants to shut down Mono. If the runtime is already
2646 * shutting down, the calling thread is suspended/stopped, and this function never
2650 mono_threads_set_shutting_down (void)
2652 MonoThread *current_thread = mono_thread_current ();
2654 mono_threads_lock ();
2656 if (shutting_down) {
2657 mono_threads_unlock ();
2659 /* Make sure we're properly suspended/stopped */
2661 EnterCriticalSection (current_thread->synch_cs);
2663 if ((current_thread->state & ThreadState_SuspendRequested) ||
2664 (current_thread->state & ThreadState_AbortRequested) ||
2665 (current_thread->state & ThreadState_StopRequested)) {
2666 LeaveCriticalSection (current_thread->synch_cs);
2667 mono_thread_execute_interruption (current_thread);
2669 current_thread->state |= ThreadState_Stopped;
2670 LeaveCriticalSection (current_thread->synch_cs);
2673 /* Wake up other threads potentially waiting for us */
2676 shutting_down = TRUE;
2678 /* Not really a background state change, but this will
2679 * interrupt the main thread if it is waiting for all
2680 * the other threads.
2682 SetEvent (background_change_event);
2684 mono_threads_unlock ();
2689 * mono_threads_is_shutting_down:
2691 * Returns whether a thread has commenced shutdown of Mono. Note that
2692 * if the function returns FALSE the caller must not assume that
2693 * shutdown is not in progress, because the situation might have
2694 * changed since the function returned. For that reason this function
2695 * is of very limited utility.
2698 mono_threads_is_shutting_down (void)
2700 return shutting_down;
2703 void mono_thread_manage (void)
2705 struct wait_data *wait=g_new0 (struct wait_data, 1);
2707 /* join each thread that's still running */
2708 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2710 mono_threads_lock ();
2712 THREAD_DEBUG (g_message("%s: No threads", __func__));
2713 mono_threads_unlock ();
2716 mono_threads_unlock ();
2719 mono_threads_lock ();
2720 if (shutting_down) {
2721 /* somebody else is shutting down */
2722 mono_threads_unlock ();
2725 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2726 mono_g_hash_table_foreach (threads, print_tids, NULL));
2728 ResetEvent (background_change_event);
2730 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2731 mono_threads_unlock ();
2733 /* Something to wait for */
2734 wait_for_tids_or_state_change (wait, INFINITE);
2736 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2737 } while(wait->num>0);
2739 mono_threads_set_shutting_down ();
2741 /* No new threads will be created after this point */
2743 mono_runtime_set_shutting_down ();
2745 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2746 mono_thread_pool_cleanup ();
2749 * Remove everything but the finalizer thread and self.
2750 * Also abort all the background threads
2753 mono_threads_lock ();
2756 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2758 mono_threads_unlock ();
2760 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2762 /* Something to wait for */
2763 wait_for_tids (wait, INFINITE);
2765 } while (wait->num > 0);
2768 * give the subthreads a chance to really quit (this is mainly needed
2769 * to get correct user and system times from getrusage/wait/time(1)).
2770 * This could be removed if we avoid pthread_detach() and use pthread_join().
2772 #ifndef PLATFORM_WIN32
2779 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2781 MonoThread *thread=(MonoThread *)value;
2783 if(thread->tid != (gsize)user) {
2784 /*TerminateThread (thread->handle, -1);*/
2788 void mono_thread_abort_all_other_threads (void)
2790 gsize self = GetCurrentThreadId ();
2792 mono_threads_lock ();
2793 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2794 mono_g_hash_table_size (threads));
2795 mono_g_hash_table_foreach (threads, print_tids, NULL));
2797 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2799 mono_threads_unlock ();
2803 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2805 MonoThread *thread = (MonoThread*)value;
2806 struct wait_data *wait = (struct wait_data*)user_data;
2810 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2812 * This needs no locking.
2814 if ((thread->state & ThreadState_Suspended) != 0 ||
2815 (thread->state & ThreadState_Stopped) != 0)
2818 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2819 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2823 wait->handles [wait->num] = handle;
2824 wait->threads [wait->num] = thread;
2830 * mono_thread_suspend_all_other_threads:
2832 * Suspend all managed threads except the finalizer thread and this thread. It is
2833 * not possible to resume them later.
2835 void mono_thread_suspend_all_other_threads (void)
2837 struct wait_data *wait = g_new0 (struct wait_data, 1);
2839 gsize self = GetCurrentThreadId ();
2841 guint32 eventidx = 0;
2842 gboolean starting, finished;
2845 * The other threads could be in an arbitrary state at this point, i.e.
2846 * they could be starting up, shutting down etc. This means that there could be
2847 * threads which are not even in the threads hash table yet.
2851 * First we set a barrier which will be checked by all threads before they
2852 * are added to the threads hash table, and they will exit if the flag is set.
2853 * This ensures that no threads could be added to the hash later.
2854 * We will use shutting_down as the barrier for now.
2856 g_assert (shutting_down);
2859 * We make multiple calls to WaitForMultipleObjects since:
2860 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
2861 * - some threads could exit without becoming suspended
2866 * Make a copy of the hashtable since we can't do anything with
2867 * threads while threads_mutex is held.
2870 mono_threads_lock ();
2871 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
2872 mono_threads_unlock ();
2874 events = g_new0 (gpointer, wait->num);
2876 /* Get the suspended events that we'll be waiting for */
2877 for (i = 0; i < wait->num; ++i) {
2878 MonoThread *thread = wait->threads [i];
2879 gboolean signal_suspend = FALSE;
2881 if ((thread->tid == self) || mono_gc_is_finalizer_thread (thread)) {
2882 //CloseHandle (wait->handles [i]);
2883 wait->threads [i] = NULL; /* ignore this thread in next loop */
2887 ensure_synch_cs_set (thread);
2889 EnterCriticalSection (thread->synch_cs);
2891 if (thread->suspended_event == NULL) {
2892 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2893 if (thread->suspended_event == NULL) {
2894 /* Forget this one and go on to the next */
2895 LeaveCriticalSection (thread->synch_cs);
2900 if ((thread->state & ThreadState_Suspended) != 0 ||
2901 (thread->state & ThreadState_StopRequested) != 0 ||
2902 (thread->state & ThreadState_Stopped) != 0) {
2903 LeaveCriticalSection (thread->synch_cs);
2904 CloseHandle (wait->handles [i]);
2905 wait->threads [i] = NULL; /* ignore this thread in next loop */
2909 if ((thread->state & ThreadState_SuspendRequested) == 0)
2910 signal_suspend = TRUE;
2912 events [eventidx++] = thread->suspended_event;
2914 /* Convert abort requests into suspend requests */
2915 if ((thread->state & ThreadState_AbortRequested) != 0)
2916 thread->state &= ~ThreadState_AbortRequested;
2918 thread->state |= ThreadState_SuspendRequested;
2920 LeaveCriticalSection (thread->synch_cs);
2922 /* Signal the thread to suspend */
2924 signal_thread_state_change (thread);
2928 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
2929 for (i = 0; i < wait->num; ++i) {
2930 MonoThread *thread = wait->threads [i];
2935 EnterCriticalSection (thread->synch_cs);
2936 if ((thread->state & ThreadState_Suspended) != 0) {
2937 CloseHandle (thread->suspended_event);
2938 thread->suspended_event = NULL;
2940 LeaveCriticalSection (thread->synch_cs);
2944 * If there are threads which are starting up, we wait until they
2945 * are suspended when they try to register in the threads hash.
2946 * This is guaranteed to finish, since the threads which can create new
2947 * threads get suspended after a while.
2948 * FIXME: The finalizer thread can still create new threads.
2950 mono_threads_lock ();
2951 starting = mono_g_hash_table_size (threads_starting_up) > 0;
2952 mono_threads_unlock ();
2966 collect_threads (gpointer key, gpointer value, gpointer user_data)
2968 MonoThread *thread = (MonoThread*)value;
2969 struct wait_data *wait = (struct wait_data*)user_data;
2972 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2973 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2977 wait->handles [wait->num] = handle;
2978 wait->threads [wait->num] = thread;
2984 * mono_threads_request_thread_dump:
2986 * Ask all threads except the current to print their stacktrace to stdout.
2989 mono_threads_request_thread_dump (void)
2991 struct wait_data *wait = g_new0 (struct wait_data, 1);
2995 * Make a copy of the hashtable since we can't do anything with
2996 * threads while threads_mutex is held.
2998 mono_threads_lock ();
2999 mono_g_hash_table_foreach (threads, collect_threads, wait);
3000 mono_threads_unlock ();
3002 for (i = 0; i < wait->num; ++i) {
3003 MonoThread *thread = wait->threads [i];
3005 if (!mono_gc_is_finalizer_thread (thread) && (thread != mono_thread_current ()) && !thread->thread_dump_requested) {
3006 thread->thread_dump_requested = TRUE;
3008 signal_thread_state_change (thread);
3011 CloseHandle (wait->handles [i]);
3016 * mono_thread_push_appdomain_ref:
3018 * Register that the current thread may have references to objects in domain
3019 * @domain on its stack. Each call to this function should be paired with a
3020 * call to pop_appdomain_ref.
3023 mono_thread_push_appdomain_ref (MonoDomain *domain)
3025 MonoThread *thread = mono_thread_current ();
3028 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3029 mono_threads_lock ();
3030 thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
3031 mono_threads_unlock ();
3036 mono_thread_pop_appdomain_ref (void)
3038 MonoThread *thread = mono_thread_current ();
3041 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3042 mono_threads_lock ();
3043 /* FIXME: How can the list be empty ? */
3044 if (thread->appdomain_refs)
3045 thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
3046 mono_threads_unlock ();
3051 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3054 mono_threads_lock ();
3055 res = g_slist_find (thread->appdomain_refs, domain) != NULL;
3056 mono_threads_unlock ();
3060 typedef struct abort_appdomain_data {
3061 struct wait_data wait;
3063 } abort_appdomain_data;
3066 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3068 MonoThread *thread = (MonoThread*)value;
3069 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3070 MonoDomain *domain = data->domain;
3072 if (mono_thread_has_appdomain_ref (thread, domain)) {
3073 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3075 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3076 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3079 data->wait.handles [data->wait.num] = handle;
3080 data->wait.threads [data->wait.num] = thread;
3083 /* Just ignore the rest, we can't do anything with
3091 * mono_threads_abort_appdomain_threads:
3093 * Abort threads which has references to the given appdomain.
3096 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3098 abort_appdomain_data user_data;
3100 int orig_timeout = timeout;
3103 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3105 start_time = mono_msec_ticks ();
3107 mono_threads_lock ();
3109 user_data.domain = domain;
3110 user_data.wait.num = 0;
3111 /* This shouldn't take any locks */
3112 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3113 mono_threads_unlock ();
3115 if (user_data.wait.num > 0) {
3116 /* Abort the threads outside the threads lock */
3117 for (i = 0; i < user_data.wait.num; ++i)
3118 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3121 * We should wait for the threads either to abort, or to leave the
3122 * domain. We can't do the latter, so we wait with a timeout.
3124 wait_for_tids (&user_data.wait, 100);
3127 /* Update remaining time */
3128 timeout -= mono_msec_ticks () - start_time;
3129 start_time = mono_msec_ticks ();
3131 if (orig_timeout != -1 && timeout < 0)
3134 while (user_data.wait.num > 0);
3136 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3142 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3144 MonoThread *thread = (MonoThread*)value;
3145 MonoDomain *domain = (MonoDomain*)user_data;
3148 /* No locking needed here */
3149 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3151 if (thread->cached_culture_info) {
3152 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3153 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3154 if (obj && obj->vtable->domain == domain)
3155 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3161 * mono_threads_clear_cached_culture:
3163 * Clear the cached_current_culture from all threads if it is in the
3167 mono_threads_clear_cached_culture (MonoDomain *domain)
3169 mono_threads_lock ();
3170 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3171 mono_threads_unlock ();
3175 * mono_thread_get_undeniable_exception:
3177 * Return an exception which needs to be raised when leaving a catch clause.
3178 * This is used for undeniable exception propagation.
3181 mono_thread_get_undeniable_exception (void)
3183 MonoThread *thread = mono_thread_current ();
3185 MONO_ARCH_SAVE_REGS;
3187 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3189 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3190 * exception if the thread no longer references a dying appdomain.
3192 thread->abort_exc->trace_ips = NULL;
3193 thread->abort_exc->stack_trace = NULL;
3194 return thread->abort_exc;
3200 #define NUM_STATIC_DATA_IDX 8
3201 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3202 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3207 * mono_alloc_static_data
3209 * Allocate memory blocks for storing threads or context static data
3212 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset)
3214 guint idx = (offset >> 24) - 1;
3217 gpointer* static_data = *static_data_ptr;
3219 static_data = mono_gc_alloc_fixed (static_data_size [0], NULL);
3220 *static_data_ptr = static_data;
3221 static_data [0] = static_data;
3224 for (i = 1; i <= idx; ++i) {
3225 if (static_data [i])
3227 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3232 * mono_init_static_data_info
3234 * Initializes static data counters
3236 static void mono_init_static_data_info (StaticDataInfo *static_data)
3238 static_data->idx = 0;
3239 static_data->offset = 0;
3240 static_data->freelist = NULL;
3244 * mono_alloc_static_data_slot
3246 * Generates an offset for static data. static_data contains the counters
3247 * used to generate it.
3250 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3254 if (!static_data->idx && !static_data->offset) {
3256 * we use the first chunk of the first allocation also as
3257 * an array for the rest of the data
3259 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3261 static_data->offset += align - 1;
3262 static_data->offset &= ~(align - 1);
3263 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3264 static_data->idx ++;
3265 g_assert (size <= static_data_size [static_data->idx]);
3266 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3267 static_data->offset = 0;
3269 offset = static_data->offset | ((static_data->idx + 1) << 24);
3270 static_data->offset += size;
3275 * ensure thread static fields already allocated are valid for thread
3276 * This function is called when a thread is created or on thread attach.
3279 thread_adjust_static_data (MonoThread *thread)
3283 mono_threads_lock ();
3284 if (thread_static_info.offset || thread_static_info.idx > 0) {
3285 /* get the current allocated size */
3286 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3287 mono_alloc_static_data (&(thread->static_data), offset);
3289 mono_threads_unlock ();
3293 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3295 MonoThread *thread = value;
3296 guint32 offset = GPOINTER_TO_UINT (user);
3298 mono_alloc_static_data (&(thread->static_data), offset);
3301 static MonoThreadDomainTls*
3302 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3304 MonoThreadDomainTls* prev = NULL;
3305 MonoThreadDomainTls* tmp = static_data->freelist;
3307 if (tmp->size == size) {
3309 prev->next = tmp->next;
3311 static_data->freelist = tmp->next;
3320 * The offset for a special static variable is composed of three parts:
3321 * a bit that indicates the type of static data (0:thread, 1:context),
3322 * an index in the array of chunks of memory for the thread (thread->static_data)
3323 * and an offset in that chunk of mem. This allows allocating less memory in the
3328 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align)
3331 if (static_type == SPECIAL_STATIC_THREAD)
3333 MonoThreadDomainTls *item;
3334 mono_threads_lock ();
3335 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3336 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3338 offset = item->offset;
3341 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3343 /* This can be called during startup */
3344 if (threads != NULL)
3345 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3346 mono_threads_unlock ();
3350 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3351 mono_contexts_lock ();
3352 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3353 mono_contexts_unlock ();
3354 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3360 mono_get_special_static_data (guint32 offset)
3362 /* The high bit means either thread (0) or static (1) data. */
3364 guint32 static_type = (offset & 0x80000000);
3367 offset &= 0x7fffffff;
3368 idx = (offset >> 24) - 1;
3370 if (static_type == 0)
3372 MonoThread *thread = mono_thread_current ();
3373 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3377 /* Allocate static data block under demand, since we don't have a list
3380 MonoAppContext *context = mono_context_get ();
3381 if (!context->static_data || !context->static_data [idx]) {
3382 mono_contexts_lock ();
3383 mono_alloc_static_data (&(context->static_data), offset);
3384 mono_contexts_unlock ();
3386 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3396 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3398 MonoThread *thread = value;
3399 TlsOffsetSize *data = user;
3400 int idx = (data->offset >> 24) - 1;
3403 if (!thread->static_data || !thread->static_data [idx])
3405 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3406 memset (ptr, 0, data->size);
3410 do_free_special (gpointer key, gpointer value, gpointer data)
3412 MonoClassField *field = key;
3413 guint32 offset = GPOINTER_TO_UINT (value);
3414 guint32 static_type = (offset & 0x80000000);
3417 size = mono_type_size (field->type, &align);
3418 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3419 if (static_type == 0) {
3421 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3422 data.offset = offset & 0x7fffffff;
3424 if (threads != NULL)
3425 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3426 item->offset = offset;
3428 item->next = thread_static_info.freelist;
3429 thread_static_info.freelist = item;
3431 /* FIXME: free context static data as well */
3436 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3438 mono_threads_lock ();
3439 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3440 mono_threads_unlock ();
3443 static MonoClassField *local_slots = NULL;
3446 /* local tls data to get locals_slot from a thread */
3449 /* index in the locals_slot array */
3454 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3456 LocalSlotID *sid = user_data;
3457 MonoThread *thread = (MonoThread*)value;
3458 MonoArray *slots_array;
3460 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3461 * it is for the right domain, so we need to check if it is allocated an initialized
3462 * for the current thread.
3464 /*g_print ("handling thread %p\n", thread);*/
3465 if (!thread->static_data || !thread->static_data [sid->idx])
3467 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3468 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3470 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3474 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3482 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3484 g_warning ("local_slots field not found in Thread class");
3488 domain = mono_domain_get ();
3489 mono_domain_lock (domain);
3490 if (domain->special_static_fields)
3491 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3492 mono_domain_unlock (domain);
3495 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3496 sid.offset = GPOINTER_TO_UINT (addr);
3497 sid.offset &= 0x7fffffff;
3498 sid.idx = (sid.offset >> 24) - 1;
3499 mono_threads_lock ();
3500 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3501 mono_threads_unlock ();
3503 /* FIXME: clear the slot for MonoAppContexts, too */
3507 #ifdef PLATFORM_WIN32
3508 static void CALLBACK dummy_apc (ULONG_PTR param)
3512 static guint32 dummy_apc (gpointer param)
3519 * mono_thread_execute_interruption
3521 * Performs the operation that the requested thread state requires (abort,
3524 static MonoException* mono_thread_execute_interruption (MonoThread *thread)
3526 ensure_synch_cs_set (thread);
3528 EnterCriticalSection (thread->synch_cs);
3530 if (thread->interruption_requested) {
3531 /* this will consume pending APC calls */
3532 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
3533 InterlockedDecrement (&thread_interruption_requested);
3534 thread->interruption_requested = FALSE;
3535 #ifndef PLATFORM_WIN32
3536 /* Clear the interrupted flag of the thread so it can wait again */
3537 wapi_clear_interruption ();
3541 if ((thread->state & ThreadState_AbortRequested) != 0) {
3542 if (thread->abort_exc == NULL)
3543 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
3544 LeaveCriticalSection (thread->synch_cs);
3545 return thread->abort_exc;
3547 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
3548 thread->state &= ~ThreadState_SuspendRequested;
3549 thread->state |= ThreadState_Suspended;
3550 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3551 if (thread->suspend_event == NULL) {
3552 LeaveCriticalSection (thread->synch_cs);
3555 if (thread->suspended_event)
3556 SetEvent (thread->suspended_event);
3558 LeaveCriticalSection (thread->synch_cs);
3560 if (shutting_down) {
3561 /* After we left the lock, the runtime might shut down so everything becomes invalid */
3566 WaitForSingleObject (thread->suspend_event, INFINITE);
3568 EnterCriticalSection (thread->synch_cs);
3570 CloseHandle (thread->suspend_event);
3571 thread->suspend_event = NULL;
3572 thread->state &= ~ThreadState_Suspended;
3574 /* The thread that requested the resume will have replaced this event
3575 * and will be waiting for it
3577 SetEvent (thread->resume_event);
3579 LeaveCriticalSection (thread->synch_cs);
3583 else if ((thread->state & ThreadState_StopRequested) != 0) {
3584 /* FIXME: do this through the JIT? */
3586 LeaveCriticalSection (thread->synch_cs);
3588 mono_thread_exit ();
3590 } else if (thread->thread_interrupt_requested) {
3592 thread->thread_interrupt_requested = FALSE;
3593 LeaveCriticalSection (thread->synch_cs);
3595 return(mono_get_exception_thread_interrupted ());
3598 LeaveCriticalSection (thread->synch_cs);
3604 * mono_thread_request_interruption
3606 * A signal handler can call this method to request the interruption of a
3607 * thread. The result of the interruption will depend on the current state of
3608 * the thread. If the result is an exception that needs to be throw, it is
3609 * provided as return value.
3612 mono_thread_request_interruption (gboolean running_managed)
3614 MonoThread *thread = mono_thread_current ();
3616 /* The thread may already be stopping */
3620 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
3623 if (!running_managed || is_running_protected_wrapper ()) {
3624 /* Can't stop while in unmanaged code. Increase the global interruption
3625 request count. When exiting the unmanaged method the count will be
3626 checked and the thread will be interrupted. */
3628 InterlockedIncrement (&thread_interruption_requested);
3630 if (mono_thread_notify_pending_exc_fn && !running_managed)
3631 /* The JIT will notify the thread about the interruption */
3632 /* This shouldn't take any locks */
3633 mono_thread_notify_pending_exc_fn ();
3635 /* this will awake the thread if it is in WaitForSingleObject
3637 /* Our implementation of this function ignores the func argument */
3638 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
3642 return mono_thread_execute_interruption (thread);
3646 gboolean mono_thread_interruption_requested ()
3648 if (thread_interruption_requested) {
3649 MonoThread *thread = mono_thread_current ();
3650 /* The thread may already be stopping */
3652 return (thread->interruption_requested);
3657 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
3659 MonoThread *thread = mono_thread_current ();
3661 /* The thread may already be stopping */
3665 mono_debugger_check_interruption ();
3667 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
3668 MonoException* exc = mono_thread_execute_interruption (thread);
3669 if (exc) mono_raise_exception (exc);
3674 * Performs the interruption of the current thread, if one has been requested,
3675 * and the thread is not running a protected wrapper.
3677 void mono_thread_interruption_checkpoint ()
3679 mono_thread_interruption_checkpoint_request (FALSE);
3683 * Performs the interruption of the current thread, if one has been requested.
3685 void mono_thread_force_interruption_checkpoint ()
3687 mono_thread_interruption_checkpoint_request (TRUE);
3691 * mono_thread_get_and_clear_pending_exception:
3693 * Return any pending exceptions for the current thread and clear it as a side effect.
3696 mono_thread_get_and_clear_pending_exception (void)
3698 MonoThread *thread = mono_thread_current ();
3700 /* The thread may already be stopping */
3704 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
3705 return mono_thread_execute_interruption (thread);
3708 if (thread->pending_exception) {
3709 MonoException *exc = thread->pending_exception;
3711 thread->pending_exception = NULL;
3719 * mono_set_pending_exception:
3721 * Set the pending exception of the current thread to EXC. On platforms which
3722 * support it, the exception will be thrown when execution returns to managed code.
3723 * On other platforms, this function is equivalent to mono_raise_exception ().
3724 * Internal calls which report exceptions using this function instead of
3725 * raise_exception () might be called by JITted code using a more efficient calling
3729 mono_set_pending_exception (MonoException *exc)
3731 MonoThread *thread = mono_thread_current ();
3733 /* The thread may already be stopping */
3737 if (mono_thread_notify_pending_exc_fn) {
3738 MONO_OBJECT_SETREF (thread, pending_exception, exc);
3740 mono_thread_notify_pending_exc_fn ();
3742 /* No way to notify the JIT about the exception, have to throw it now */
3743 mono_raise_exception (exc);
3748 * mono_thread_interruption_request_flag:
3750 * Returns the address of a flag that will be non-zero if an interruption has
3751 * been requested for a thread. The thread to interrupt may not be the current
3752 * thread, so an additional call to mono_thread_interruption_requested() or
3753 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
3756 gint32* mono_thread_interruption_request_flag ()
3758 return &thread_interruption_requested;
3762 mono_thread_init_apartment_state (void)
3765 thread = mono_thread_current ();
3767 #ifdef PLATFORM_WIN32
3768 /* Positive return value indicates success, either
3769 * S_OK if this is first CoInitialize call, or
3770 * S_FALSE if CoInitialize already called, but with same
3771 * threading model. A negative value indicates failure,
3772 * probably due to trying to change the threading model.
3774 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
3775 ? COINIT_APARTMENTTHREADED
3776 : COINIT_MULTITHREADED) < 0) {
3777 thread->apartment_state = ThreadApartmentState_Unknown;
3783 mono_thread_cleanup_apartment_state (void)
3785 #ifdef PLATFORM_WIN32
3787 thread = mono_thread_current ();
3789 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
3796 mono_thread_set_state (MonoThread *thread, MonoThreadState state)
3798 ensure_synch_cs_set (thread);
3800 EnterCriticalSection (thread->synch_cs);
3801 thread->state |= state;
3802 LeaveCriticalSection (thread->synch_cs);
3806 mono_thread_clr_state (MonoThread *thread, MonoThreadState state)
3808 ensure_synch_cs_set (thread);
3810 EnterCriticalSection (thread->synch_cs);
3811 thread->state &= ~state;
3812 LeaveCriticalSection (thread->synch_cs);
3816 mono_thread_test_state (MonoThread *thread, MonoThreadState test)
3818 gboolean ret = FALSE;
3820 ensure_synch_cs_set (thread);
3822 EnterCriticalSection (thread->synch_cs);
3824 if ((thread->state & test) != 0) {
3828 LeaveCriticalSection (thread->synch_cs);