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)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threadpool.h>
25 #include <mono/metadata/threads-types.h>
26 #include <mono/metadata/exception.h>
27 #include <mono/metadata/environment.h>
28 #include <mono/metadata/monitor.h>
29 #include <mono/metadata/gc-internal.h>
30 #include <mono/metadata/marshal.h>
31 #include <mono/metadata/runtime.h>
32 #include <mono/io-layer/io-layer.h>
33 #include <mono/metadata/object-internals.h>
34 #include <mono/metadata/mono-debug-debugger.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
45 #include <mono/metadata/gc-internal.h>
47 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64)
48 #define USE_TKILL_ON_ANDROID 1
51 #ifdef PLATFORM_ANDROID
54 #ifdef USE_TKILL_ON_ANDROID
55 extern int tkill (pid_t tid, int signal);
59 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
60 #define THREAD_DEBUG(a)
61 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
62 #define THREAD_WAIT_DEBUG(a)
63 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
64 #define LIBGC_DEBUG(a)
66 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
67 #define SPIN_LOCK(i) do { \
68 if (SPIN_TRYLOCK (i)) \
72 #define SPIN_UNLOCK(i) i = 0
74 #define LOCK_THREAD(thread) lock_thread((thread))
75 #define UNLOCK_THREAD(thread) unlock_thread((thread))
77 /* Provide this for systems with glib < 2.6 */
78 #ifndef G_GSIZE_FORMAT
79 # if GLIB_SIZEOF_LONG == 8
80 # define G_GSIZE_FORMAT "lu"
82 # define G_GSIZE_FORMAT "u"
88 guint32 (*func)(void *);
104 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
105 struct _MonoThreadDomainTls {
106 MonoThreadDomainTls *next;
114 MonoThreadDomainTls *freelist;
117 /* Number of cached culture objects in the MonoThread->cached_culture_info array
118 * (per-type): we use the first NUM entries for CultureInfo and the last for
119 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
121 #define NUM_CACHED_CULTURES 4
122 #define CULTURES_START_IDX 0
123 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
125 /* Controls access to the 'threads' hash table */
126 #define mono_threads_lock() mono_mutex_lock (&threads_mutex)
127 #define mono_threads_unlock() mono_mutex_unlock (&threads_mutex)
128 static mono_mutex_t threads_mutex;
130 /* Controls access to context static data */
131 #define mono_contexts_lock() mono_mutex_lock (&contexts_mutex)
132 #define mono_contexts_unlock() mono_mutex_unlock (&contexts_mutex)
133 static mono_mutex_t contexts_mutex;
135 /* Controls access to the 'joinable_threads' hash table */
136 #define joinable_threads_lock() mono_mutex_lock (&joinable_threads_mutex)
137 #define joinable_threads_unlock() mono_mutex_unlock (&joinable_threads_mutex)
138 static mono_mutex_t joinable_threads_mutex;
140 /* Holds current status of static data heap */
141 static StaticDataInfo thread_static_info;
142 static StaticDataInfo context_static_info;
144 /* The hash of existing threads (key is thread ID, value is
145 * MonoInternalThread*) that need joining before exit
147 static MonoGHashTable *threads=NULL;
150 * Threads which are starting up and they are not in the 'threads' hash yet.
151 * When handle_store is called for a thread, it will be removed from this hash table.
152 * Protected by mono_threads_lock ().
154 static MonoGHashTable *threads_starting_up = NULL;
156 /* Maps a MonoThread to its start argument */
157 /* Protected by mono_threads_lock () */
158 static MonoGHashTable *thread_start_args = NULL;
160 /* The TLS key that holds the MonoObject assigned to each thread */
161 static MonoNativeTlsKey current_object_key;
164 /* Protected by the threads lock */
165 static GHashTable *joinable_threads;
166 static int joinable_thread_count;
168 #ifdef MONO_HAVE_FAST_TLS
169 /* we need to use both the Tls* functions and __thread because
170 * the gc needs to see all the threads
172 MONO_FAST_TLS_DECLARE(tls_current_object);
173 #define SET_CURRENT_OBJECT(x) do { \
174 MONO_FAST_TLS_SET (tls_current_object, x); \
175 mono_native_tls_set_value (current_object_key, x); \
177 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
179 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
180 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
183 /* function called at thread start */
184 static MonoThreadStartCB mono_thread_start_cb = NULL;
186 /* function called at thread attach */
187 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
189 /* function called at thread cleanup */
190 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
192 /* function called to notify the runtime about a pending exception on the current thread */
193 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
195 /* The default stack size for each thread */
196 static guint32 default_stacksize = 0;
197 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
199 static void thread_adjust_static_data (MonoInternalThread *thread);
200 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
201 static void mono_init_static_data_info (StaticDataInfo *static_data);
202 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
203 static gboolean mono_thread_resume (MonoInternalThread* thread);
204 static void signal_thread_state_change (MonoInternalThread *thread);
205 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
206 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
207 static void self_suspend_internal (MonoInternalThread *thread);
208 static gboolean resume_thread_internal (MonoInternalThread *thread);
210 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
211 static void ref_stack_destroy (gpointer rs);
213 /* Spin lock for InterlockedXXX 64 bit functions */
214 #define mono_interlocked_lock() mono_mutex_lock (&interlocked_mutex)
215 #define mono_interlocked_unlock() mono_mutex_unlock (&interlocked_mutex)
216 static mono_mutex_t interlocked_mutex;
218 /* global count of thread interruptions requested */
219 static gint32 thread_interruption_requested = 0;
221 /* Event signaled when a thread changes its background mode */
222 static HANDLE background_change_event;
224 static gboolean shutting_down = FALSE;
226 static gint32 managed_thread_id_counter = 0;
229 get_next_managed_thread_id (void)
231 return InterlockedIncrement (&managed_thread_id_counter);
235 mono_thread_get_tls_key (void)
237 return current_object_key;
241 mono_thread_get_tls_offset (void)
244 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
248 static inline MonoNativeThreadId
249 thread_get_tid (MonoInternalThread *thread)
251 /* We store the tid as a guint64 to keep the object layout constant between platforms */
252 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
255 /* handle_store() and handle_remove() manage the array of threads that
256 * still need to be waited for when the main thread exits.
258 * If handle_store() returns FALSE the thread must not be started
259 * because Mono is shutting down.
261 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
263 mono_threads_lock ();
265 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
267 if (threads_starting_up)
268 mono_g_hash_table_remove (threads_starting_up, thread);
270 if (shutting_down && !force_attach) {
271 mono_threads_unlock ();
276 MONO_GC_REGISTER_ROOT_FIXED (threads);
277 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
280 /* We don't need to duplicate thread->handle, because it is
281 * only closed when the thread object is finalized by the GC.
283 g_assert (thread->internal_thread);
284 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
285 thread->internal_thread);
287 mono_threads_unlock ();
292 static gboolean handle_remove(MonoInternalThread *thread)
295 gsize tid = thread->tid;
297 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
299 mono_threads_lock ();
302 /* We have to check whether the thread object for the
303 * tid is still the same in the table because the
304 * thread might have been destroyed and the tid reused
305 * in the meantime, in which case the tid would be in
306 * the table, but with another thread object.
308 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
309 mono_g_hash_table_remove (threads, (gpointer)tid);
318 mono_threads_unlock ();
320 /* Don't close the handle here, wait for the object finalizer
321 * to do it. Otherwise, the following race condition applies:
323 * 1) Thread exits (and handle_remove() closes the handle)
325 * 2) Some other handle is reassigned the same slot
327 * 3) Another thread tries to join the first thread, and
328 * blocks waiting for the reassigned handle to be signalled
329 * (which might never happen). This is possible, because the
330 * thread calling Join() still has a reference to the first
336 static void ensure_synch_cs_set (MonoInternalThread *thread)
338 mono_mutex_t *synch_cs;
340 if (thread->synch_cs != NULL) {
344 synch_cs = g_new0 (mono_mutex_t, 1);
345 mono_mutex_init_recursive (synch_cs);
347 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
348 synch_cs, NULL) != NULL) {
349 /* Another thread must have installed this CS */
350 mono_mutex_destroy (synch_cs);
356 lock_thread (MonoInternalThread *thread)
358 if (!thread->synch_cs)
359 ensure_synch_cs_set (thread);
361 g_assert (thread->synch_cs);
362 mono_mutex_lock (thread->synch_cs);
366 unlock_thread (MonoInternalThread *thread)
368 mono_mutex_unlock (thread->synch_cs);
372 * NOTE: this function can be called also for threads different from the current one:
373 * make sure no code called from it will ever assume it is run on the thread that is
374 * getting cleaned up.
376 static void thread_cleanup (MonoInternalThread *thread)
378 g_assert (thread != NULL);
380 if (thread->abort_state_handle) {
381 mono_gchandle_free (thread->abort_state_handle);
382 thread->abort_state_handle = 0;
384 thread->abort_exc = NULL;
385 thread->current_appcontext = NULL;
388 * This is necessary because otherwise we might have
389 * cross-domain references which will not get cleaned up when
390 * the target domain is unloaded.
392 if (thread->cached_culture_info) {
394 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
395 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
399 * thread->synch_cs can be NULL if this was called after
400 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
401 * This can happen only during shutdown.
402 * The shutting_down flag is not always set, so we can't assert on it.
404 if (thread->synch_cs)
405 LOCK_THREAD (thread);
407 thread->state |= ThreadState_Stopped;
408 thread->state &= ~ThreadState_Background;
410 if (thread->synch_cs)
411 UNLOCK_THREAD (thread);
414 An interruption request has leaked to cleanup. Adjust the global counter.
416 This can happen is the abort source thread finds the abortee (this) thread
417 in unmanaged code. If this thread never trips back to managed code or check
418 the local flag it will be left set and positively unbalance the global counter.
420 Leaving the counter unbalanced will cause a performance degradation since all threads
421 will now keep checking their local flags all the time.
423 if (InterlockedExchange (&thread->interruption_requested, 0))
424 InterlockedDecrement (&thread_interruption_requested);
426 /* if the thread is not in the hash it has been removed already */
427 if (!handle_remove (thread)) {
428 if (thread == mono_thread_internal_current ()) {
429 mono_domain_unset ();
430 mono_memory_barrier ();
432 /* This needs to be called even if handle_remove () fails */
433 if (mono_thread_cleanup_fn)
434 mono_thread_cleanup_fn (thread);
437 mono_release_type_locks (thread);
439 mono_profiler_thread_end (thread->tid);
441 if (thread == mono_thread_internal_current ()) {
443 * This will signal async signal handlers that the thread has exited.
444 * The profiler callback needs this to be set, so it cannot be done earlier.
446 mono_domain_unset ();
447 mono_memory_barrier ();
450 if (thread == mono_thread_internal_current ())
451 mono_thread_pop_appdomain_ref ();
453 thread->cached_culture_info = NULL;
455 mono_free_static_data (thread->static_data, TRUE);
456 thread->static_data = NULL;
457 ref_stack_destroy (thread->appdomain_refs);
458 thread->appdomain_refs = NULL;
460 if (mono_thread_cleanup_fn)
461 mono_thread_cleanup_fn (thread);
463 if (mono_gc_is_moving ()) {
464 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
465 thread->thread_pinning_ref = NULL;
470 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
473 g_assert ((offset & 0x80000000) == 0);
474 offset &= 0x7fffffff;
475 idx = (offset >> 24) - 1;
476 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
480 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
482 static MonoClassField *current_thread_field = NULL;
486 if (!current_thread_field) {
487 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
488 g_assert (current_thread_field);
491 mono_class_vtable (domain, mono_defaults.thread_class);
492 mono_domain_lock (domain);
493 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
494 mono_domain_unlock (domain);
497 return get_thread_static_data (thread, offset);
501 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
503 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
505 g_assert (current->obj.vtable->domain == domain);
507 g_assert (!*current_thread_ptr);
508 *current_thread_ptr = current;
512 create_thread_object (MonoDomain *domain)
514 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
515 return (MonoThread*)mono_gc_alloc_mature (vt);
519 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
521 MonoThread *thread = create_thread_object (domain);
522 MONO_OBJECT_SETREF (thread, internal_thread, internal);
526 static MonoInternalThread*
527 create_internal_thread (void)
529 MonoInternalThread *thread;
532 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
533 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
535 thread->synch_cs = g_new0 (mono_mutex_t, 1);
536 mono_mutex_init_recursive (thread->synch_cs);
538 thread->apartment_state = ThreadApartmentState_Unknown;
539 thread->managed_id = get_next_managed_thread_id ();
540 if (mono_gc_is_moving ()) {
541 thread->thread_pinning_ref = thread;
542 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
549 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
551 MonoDomain *domain = mono_get_root_domain ();
553 if (!candidate || candidate->obj.vtable->domain != domain)
554 candidate = new_thread_with_internal (domain, thread);
555 set_current_thread_for_domain (domain, thread, candidate);
556 g_assert (!thread->root_domain_thread);
557 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
560 static guint32 WINAPI start_wrapper_internal(void *data)
562 MonoThreadInfo *info;
563 StartInfo *start_info = (StartInfo *)data;
564 guint32 (*start_func)(void *);
568 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
571 MonoInternalThread *internal = start_info->obj->internal_thread;
572 MonoObject *start_delegate = start_info->delegate;
573 MonoDomain *domain = start_info->obj->obj.vtable->domain;
575 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
577 /* We can be sure start_info->obj->tid and
578 * start_info->obj->handle have been set, because the thread
579 * was created suspended, and these values were set before the
583 info = mono_thread_info_current ();
585 internal->thread_info = info;
586 internal->small_id = info->small_id;
590 SET_CURRENT_OBJECT (internal);
592 /* Every thread references the appdomain which created it */
593 mono_thread_push_appdomain_ref (domain);
595 if (!mono_domain_set (domain, FALSE)) {
596 /* No point in raising an appdomain_unloaded exception here */
597 /* FIXME: Cleanup here */
598 mono_thread_pop_appdomain_ref ();
602 start_func = start_info->func;
603 start_arg = start_info->start_arg;
605 /* We have to do this here because mono_thread_new_init()
606 requires that root_domain_thread is set up. */
607 thread_adjust_static_data (internal);
608 init_root_domain_thread (internal, start_info->obj);
610 /* This MUST be called before any managed code can be
611 * executed, as it calls the callback function that (for the
612 * jit) sets the lmf marker.
614 mono_thread_new_init (tid, &tid, start_func);
615 internal->stack_ptr = &tid;
617 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
619 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
621 /* On 2.0 profile (and higher), set explicitly since state might have been
623 if (internal->apartment_state == ThreadApartmentState_Unknown)
624 internal->apartment_state = ThreadApartmentState_MTA;
626 mono_thread_init_apartment_state ();
628 if(internal->start_notify!=NULL) {
629 /* Let the thread that called Start() know we're
632 ReleaseSemaphore (internal->start_notify, 1, NULL);
635 mono_threads_lock ();
636 mono_g_hash_table_remove (thread_start_args, start_info->obj);
637 mono_threads_unlock ();
639 mono_thread_set_execution_context (start_info->obj->ec_to_set);
640 start_info->obj->ec_to_set = NULL;
643 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
647 * Call this after calling start_notify, since the profiler callback might want
648 * to lock the thread, and the lock is held by thread_start () which waits for
651 mono_profiler_thread_start (tid);
653 /* if the name was set before starting, we didn't invoke the profiler callback */
654 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
655 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
656 mono_profiler_thread_name (internal->tid, tname);
659 /* start_func is set only for unmanaged start functions */
661 start_func (start_arg);
664 g_assert (start_delegate != NULL);
665 args [0] = start_arg;
666 /* we may want to handle the exception here. See comment below on unhandled exceptions */
667 mono_runtime_delegate_invoke (start_delegate, args, NULL);
670 /* If the thread calls ExitThread at all, this remaining code
671 * will not be executed, but the main thread will eventually
672 * call thread_cleanup() on this thread's behalf.
675 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
677 /* Do any cleanup needed for apartment state. This
678 * cannot be done in thread_cleanup since thread_cleanup could be
679 * called for a thread other than the current thread.
680 * mono_thread_cleanup_apartment_state cleans up apartment
681 * for the current thead */
682 mono_thread_cleanup_apartment_state ();
684 thread_cleanup (internal);
688 /* Remove the reference to the thread object in the TLS data,
689 * so the thread object can be finalized. This won't be
690 * reached if the thread threw an uncaught exception, so those
691 * thread handles will stay referenced :-( (This is due to
692 * missing support for scanning thread-specific data in the
693 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
696 SET_CURRENT_OBJECT (NULL);
701 static guint32 WINAPI start_wrapper(void *data)
705 /* Avoid scanning the frames above this frame during a GC */
706 mono_gc_set_stack_end ((void*)&dummy);
708 return start_wrapper_internal (data);
714 * Common thread creation code.
715 * LOCKING: Acquires the threads lock.
718 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
719 gboolean throw_on_failure)
721 HANDLE thread_handle;
722 MonoNativeThreadId tid;
723 guint32 create_flags;
726 * Join joinable threads to prevent running out of threads since the finalizer
727 * thread might be blocked/backlogged.
729 mono_threads_join_threads ();
731 mono_threads_lock ();
734 mono_threads_unlock ();
738 * The thread start argument may be an object reference, and there is
739 * no ref to keep it alive when the new thread is started but not yet
740 * registered with the collector. So we store it in a GC tracked hash
743 if (thread_start_args == NULL) {
744 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
745 thread_start_args = mono_g_hash_table_new (NULL, NULL);
747 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
748 if (threads_starting_up == NULL) {
749 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
750 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
752 mono_g_hash_table_insert (threads_starting_up, thread, thread);
753 mono_threads_unlock ();
755 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
756 if (!internal->start_notify) {
757 mono_threads_lock ();
758 mono_g_hash_table_remove (threads_starting_up, thread);
759 mono_threads_unlock ();
760 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
766 stack_size = default_stacksize_for_thread (internal);
768 /* Create suspended, so we can do some housekeeping before the thread
771 create_flags = CREATE_SUSPENDED;
772 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
773 stack_size, create_flags, &tid);
774 if (thread_handle == NULL) {
775 /* The thread couldn't be created, so throw an exception */
776 mono_threads_lock ();
777 mono_g_hash_table_remove (threads_starting_up, thread);
778 mono_threads_unlock ();
780 if (throw_on_failure)
781 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
783 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
786 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
788 internal->handle = thread_handle;
789 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
791 internal->threadpool_thread = threadpool_thread;
792 if (threadpool_thread)
793 mono_thread_set_state (internal, ThreadState_Background);
795 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
797 /* Only store the handle when the thread is about to be
798 * launched, to avoid the main thread deadlocking while trying
799 * to clean up a thread that will never be signalled.
801 if (!handle_store (thread, FALSE))
804 mono_thread_info_resume (tid);
806 if (internal->start_notify) {
808 * Wait for the thread to set up its TLS data etc, so
809 * theres no potential race condition if someone tries
810 * to look up the data believing the thread has
813 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
815 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
816 CloseHandle (internal->start_notify);
817 internal->start_notify = NULL;
820 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
825 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
827 if (mono_thread_start_cb) {
828 mono_thread_start_cb (tid, stack_start, func);
832 void mono_threads_set_default_stacksize (guint32 stacksize)
834 default_stacksize = stacksize;
837 guint32 mono_threads_get_default_stacksize (void)
839 return default_stacksize;
843 * mono_thread_create_internal:
847 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
850 MonoInternalThread *internal;
851 StartInfo *start_info;
854 thread = create_thread_object (domain);
855 internal = create_internal_thread ();
856 MONO_OBJECT_SETREF (thread, internal_thread, internal);
858 start_info = g_new0 (StartInfo, 1);
859 start_info->func = func;
860 start_info->obj = thread;
861 start_info->start_arg = arg;
863 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
867 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
868 if (mono_check_corlib_version () == NULL)
869 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
875 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
877 mono_thread_create_internal (domain, func, arg, FALSE, 0);
881 mono_thread_attach (MonoDomain *domain)
883 return mono_thread_attach_full (domain, FALSE);
887 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
889 MonoThreadInfo *info;
890 MonoInternalThread *thread;
891 MonoThread *current_thread;
892 HANDLE thread_handle;
895 if ((thread = mono_thread_internal_current ())) {
896 if (domain != mono_domain_get ())
897 mono_domain_set (domain, TRUE);
898 /* Already attached */
899 return mono_thread_current ();
902 if (!mono_gc_register_thread (&domain)) {
903 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 ());
906 thread = create_internal_thread ();
908 thread_handle = mono_thread_info_open_handle ();
909 g_assert (thread_handle);
911 tid=GetCurrentThreadId ();
913 thread->handle=thread_handle;
915 #ifdef PLATFORM_ANDROID
916 thread->android_tid = (gpointer) gettid ();
918 thread->stack_ptr = &tid;
920 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
922 info = mono_thread_info_current ();
924 thread->thread_info = info;
925 thread->small_id = info->small_id;
927 current_thread = new_thread_with_internal (domain, thread);
929 if (!handle_store (current_thread, force_attach)) {
930 /* Mono is shutting down, so just wait for the end */
935 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
937 SET_CURRENT_OBJECT (thread);
938 mono_domain_set (domain, TRUE);
940 thread_adjust_static_data (thread);
942 init_root_domain_thread (thread, current_thread);
943 if (domain != mono_get_root_domain ())
944 set_current_thread_for_domain (domain, thread, current_thread);
947 if (mono_thread_attach_cb) {
951 mono_thread_info_get_stack_bounds (&staddr, &stsize);
954 mono_thread_attach_cb (tid, &tid);
956 mono_thread_attach_cb (tid, staddr + stsize);
959 // FIXME: Need a separate callback
960 mono_profiler_thread_start (tid);
962 return current_thread;
966 mono_thread_detach_internal (MonoInternalThread *thread)
968 g_return_if_fail (thread != NULL);
970 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
972 thread_cleanup (thread);
974 SET_CURRENT_OBJECT (NULL);
975 mono_domain_unset ();
977 /* Don't need to CloseHandle this thread, even though we took a
978 * reference in mono_thread_attach (), because the GC will do it
979 * when the Thread object is finalised.
984 mono_thread_detach (MonoThread *thread)
987 mono_thread_detach_internal (thread->internal_thread);
991 * mono_thread_detach_if_exiting:
993 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
994 * This should be used at the end of embedding code which calls into managed code, and which
995 * can be called from pthread dtors, like dealloc: implementations in objective-c.
998 mono_thread_detach_if_exiting (void)
1000 if (mono_thread_info_is_exiting ()) {
1001 MonoInternalThread *thread;
1003 thread = mono_thread_internal_current ();
1005 mono_thread_detach_internal (thread);
1006 mono_thread_info_detach ();
1014 MonoInternalThread *thread = mono_thread_internal_current ();
1016 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1018 thread_cleanup (thread);
1019 SET_CURRENT_OBJECT (NULL);
1020 mono_domain_unset ();
1022 /* we could add a callback here for embedders to use. */
1023 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1024 exit (mono_environment_exitcode_get ());
1025 mono_thread_info_exit ();
1029 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1031 MonoInternalThread *internal = create_internal_thread ();
1033 internal->state = ThreadState_Unstarted;
1035 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1039 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this,
1042 StartInfo *start_info;
1043 MonoInternalThread *internal;
1046 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1048 if (!this->internal_thread)
1049 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1050 internal = this->internal_thread;
1052 LOCK_THREAD (internal);
1054 if ((internal->state & ThreadState_Unstarted) == 0) {
1055 UNLOCK_THREAD (internal);
1056 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1060 if ((internal->state & ThreadState_Aborted) != 0) {
1061 UNLOCK_THREAD (internal);
1064 /* This is freed in start_wrapper */
1065 start_info = g_new0 (StartInfo, 1);
1066 start_info->func = NULL;
1067 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1068 start_info->delegate = start;
1069 start_info->obj = this;
1070 g_assert (this->obj.vtable->domain == mono_domain_get ());
1072 res = create_thread (this, internal, start_info, FALSE, 0, FALSE);
1074 UNLOCK_THREAD (internal);
1078 internal->state &= ~ThreadState_Unstarted;
1080 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1082 UNLOCK_THREAD (internal);
1083 return internal->handle;
1087 * This is called from the finalizer of the internal thread object.
1090 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1092 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1095 * Since threads keep a reference to their thread object while running, by the time this function is called,
1096 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1097 * when thread_cleanup () can be called after this.
1100 CloseHandle (thread);
1102 if (this->synch_cs) {
1103 mono_mutex_t *synch_cs = this->synch_cs;
1104 this->synch_cs = NULL;
1105 mono_mutex_destroy (synch_cs);
1110 void *name = this->name;
1116 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1119 MonoInternalThread *thread = mono_thread_internal_current ();
1121 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1123 mono_thread_current_check_pending_interrupt ();
1126 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1128 res = SleepEx(ms,TRUE);
1130 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1132 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1133 MonoException* exc = mono_thread_execute_interruption (thread);
1135 mono_raise_exception (exc);
1147 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1152 ves_icall_System_Threading_Thread_GetDomainID (void)
1154 return mono_domain_get()->domain_id;
1158 ves_icall_System_Threading_Thread_Yield (void)
1160 return mono_thread_info_yield ();
1164 * mono_thread_get_name:
1166 * Return the name of the thread. NAME_LEN is set to the length of the name.
1167 * Return NULL if the thread has no name. The returned memory is owned by the
1171 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1175 LOCK_THREAD (this_obj);
1177 if (!this_obj->name) {
1181 *name_len = this_obj->name_len;
1182 res = g_new (gunichar2, this_obj->name_len);
1183 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1186 UNLOCK_THREAD (this_obj);
1192 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1196 LOCK_THREAD (this_obj);
1198 if (!this_obj->name)
1201 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1203 UNLOCK_THREAD (this_obj);
1209 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1211 LOCK_THREAD (this_obj);
1213 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1214 UNLOCK_THREAD (this_obj);
1216 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1219 if (this_obj->name) {
1220 g_free (this_obj->name);
1221 this_obj->name_len = 0;
1224 this_obj->name = g_new (gunichar2, mono_string_length (name));
1225 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1226 this_obj->name_len = mono_string_length (name);
1229 this_obj->name = NULL;
1232 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1234 UNLOCK_THREAD (this_obj);
1236 if (this_obj->name && this_obj->tid) {
1237 char *tname = mono_string_to_utf8 (name);
1238 mono_profiler_thread_name (this_obj->tid, tname);
1239 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1245 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1247 mono_thread_set_name_internal (this_obj, name, TRUE);
1250 /* If the array is already in the requested domain, we just return it,
1251 otherwise we return a copy in that domain. */
1253 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1260 if (mono_object_domain (arr) == domain)
1263 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1264 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1269 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1271 return byte_array_to_domain (arr, mono_get_root_domain ());
1275 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1277 return byte_array_to_domain (arr, mono_domain_get ());
1281 mono_thread_current (void)
1283 MonoDomain *domain = mono_domain_get ();
1284 MonoInternalThread *internal = mono_thread_internal_current ();
1285 MonoThread **current_thread_ptr;
1287 g_assert (internal);
1288 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1290 if (!*current_thread_ptr) {
1291 g_assert (domain != mono_get_root_domain ());
1292 *current_thread_ptr = new_thread_with_internal (domain, internal);
1294 return *current_thread_ptr;
1298 mono_thread_internal_current (void)
1300 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1301 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1305 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1306 int ms, HANDLE thread)
1308 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1311 mono_thread_current_check_pending_interrupt ();
1315 if ((this->state & ThreadState_Unstarted) != 0) {
1316 UNLOCK_THREAD (this);
1318 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1322 UNLOCK_THREAD (this);
1327 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1329 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1331 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1333 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1335 if(ret==WAIT_OBJECT_0) {
1336 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1341 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1347 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1355 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1358 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1360 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1362 if (ret != WAIT_IO_COMPLETION)
1365 exc = mono_thread_execute_interruption (thread);
1367 mono_raise_exception (exc);
1372 /* Re-calculate ms according to the time passed */
1373 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1374 if (diff_ms >= ms) {
1378 wait = ms - diff_ms;
1384 /* FIXME: exitContext isnt documented */
1385 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1391 MonoObject *waitHandle;
1392 MonoInternalThread *thread = mono_thread_internal_current ();
1394 /* Do this WaitSleepJoin check before creating objects */
1395 mono_thread_current_check_pending_interrupt ();
1397 /* We fail in managed if the array has more than 64 elements */
1398 numhandles = (guint32)mono_array_length(mono_handles);
1399 handles = g_new0(HANDLE, numhandles);
1401 for(i = 0; i < numhandles; i++) {
1402 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1403 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1410 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1412 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1414 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1418 if(ret==WAIT_FAILED) {
1419 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1421 } else if(ret==WAIT_TIMEOUT) {
1422 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1429 /* FIXME: exitContext isnt documented */
1430 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1432 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1433 uintptr_t numhandles;
1436 MonoObject *waitHandle;
1437 MonoInternalThread *thread = mono_thread_internal_current ();
1439 /* Do this WaitSleepJoin check before creating objects */
1440 mono_thread_current_check_pending_interrupt ();
1442 numhandles = mono_array_length(mono_handles);
1443 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1446 for(i = 0; i < numhandles; i++) {
1447 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1448 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1455 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1457 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1459 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1461 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1464 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1466 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1467 return ret - WAIT_OBJECT_0;
1469 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1470 return ret - WAIT_ABANDONED_0;
1477 /* FIXME: exitContext isnt documented */
1478 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1481 MonoInternalThread *thread = mono_thread_internal_current ();
1483 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1489 mono_thread_current_check_pending_interrupt ();
1491 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1493 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1495 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1497 if(ret==WAIT_FAILED) {
1498 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1500 } else if(ret==WAIT_TIMEOUT) {
1501 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1509 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1512 MonoInternalThread *thread = mono_thread_internal_current ();
1517 mono_thread_current_check_pending_interrupt ();
1519 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1521 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1523 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1525 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1528 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1535 mutex = CreateMutex (NULL, owned, NULL);
1537 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1539 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1547 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1548 return(ReleaseMutex (handle));
1551 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1557 *error = ERROR_SUCCESS;
1559 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1561 *error = GetLastError ();
1568 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1575 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1577 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1578 mono_string_chars (name));
1580 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1588 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1592 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1597 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1601 *error = ERROR_SUCCESS;
1603 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1605 *error = GetLastError ();
1611 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
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 return (SetEvent(handle));
1635 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1636 return (ResetEvent(handle));
1640 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1641 CloseHandle (handle);
1644 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1650 *error = ERROR_SUCCESS;
1652 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1654 *error = GetLastError ();
1660 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1662 return InterlockedIncrement (location);
1665 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1667 #if SIZEOF_VOID_P == 4
1668 if (G_UNLIKELY ((size_t)location & 0x7)) {
1670 mono_interlocked_lock ();
1673 mono_interlocked_unlock ();
1677 return InterlockedIncrement64 (location);
1680 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1682 return InterlockedDecrement(location);
1685 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1687 #if SIZEOF_VOID_P == 4
1688 if (G_UNLIKELY ((size_t)location & 0x7)) {
1690 mono_interlocked_lock ();
1693 mono_interlocked_unlock ();
1697 return InterlockedDecrement64 (location);
1700 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1702 return InterlockedExchange(location, value);
1705 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1708 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1709 mono_gc_wbarrier_generic_nostore (location);
1713 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1715 return InterlockedExchangePointer(location, value);
1718 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1720 IntFloatUnion val, ret;
1723 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1729 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1731 #if SIZEOF_VOID_P == 4
1732 if (G_UNLIKELY ((size_t)location & 0x7)) {
1734 mono_interlocked_lock ();
1737 mono_interlocked_unlock ();
1741 return InterlockedExchange64 (location, value);
1745 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1747 LongDoubleUnion val, ret;
1750 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1755 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1757 return InterlockedCompareExchange(location, value, comparand);
1760 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1763 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1764 mono_gc_wbarrier_generic_nostore (location);
1768 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1770 return InterlockedCompareExchangePointer(location, value, comparand);
1773 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1775 IntFloatUnion val, ret, cmp;
1778 cmp.fval = comparand;
1779 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1785 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1787 #if SIZEOF_VOID_P == 8
1788 LongDoubleUnion val, comp, ret;
1791 comp.fval = comparand;
1792 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1798 mono_interlocked_lock ();
1800 if (old == comparand)
1802 mono_interlocked_unlock ();
1809 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1811 #if SIZEOF_VOID_P == 4
1812 if (G_UNLIKELY ((size_t)location & 0x7)) {
1814 mono_interlocked_lock ();
1816 if (old == comparand)
1818 mono_interlocked_unlock ();
1822 return InterlockedCompareExchange64 (location, value, comparand);
1826 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1829 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1830 mono_gc_wbarrier_generic_nostore (location);
1835 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1838 res = InterlockedExchangePointer ((gpointer *)location, value);
1839 mono_gc_wbarrier_generic_nostore (location);
1844 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1846 return InterlockedAdd (location, value);
1850 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1852 #if SIZEOF_VOID_P == 4
1853 if (G_UNLIKELY ((size_t)location & 0x7)) {
1855 mono_interlocked_lock ();
1858 mono_interlocked_unlock ();
1862 return InterlockedAdd64 (location, value);
1866 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1868 #if SIZEOF_VOID_P == 4
1869 if (G_UNLIKELY ((size_t)location & 0x7)) {
1871 mono_interlocked_lock ();
1873 mono_interlocked_unlock ();
1877 return InterlockedRead64 (location);
1881 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1883 mono_memory_barrier ();
1887 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1889 mono_thread_clr_state (this, state);
1891 if (state & ThreadState_Background) {
1892 /* If the thread changes the background mode, the main thread has to
1893 * be notified, since it has to rebuild the list of threads to
1896 SetEvent (background_change_event);
1901 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1903 mono_thread_set_state (this, state);
1905 if (state & ThreadState_Background) {
1906 /* If the thread changes the background mode, the main thread has to
1907 * be notified, since it has to rebuild the list of threads to
1910 SetEvent (background_change_event);
1915 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1921 state = this->state;
1923 UNLOCK_THREAD (this);
1928 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1930 MonoInternalThread *current;
1935 current = mono_thread_internal_current ();
1937 this->thread_interrupt_requested = TRUE;
1938 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1940 UNLOCK_THREAD (this);
1943 abort_thread_internal (this, TRUE, FALSE);
1947 void mono_thread_current_check_pending_interrupt ()
1949 MonoInternalThread *thread = mono_thread_internal_current ();
1950 gboolean throw = FALSE;
1952 LOCK_THREAD (thread);
1954 if (thread->thread_interrupt_requested) {
1956 thread->thread_interrupt_requested = FALSE;
1959 UNLOCK_THREAD (thread);
1962 mono_raise_exception (mono_get_exception_thread_interrupted ());
1967 mono_thread_get_abort_signal (void)
1971 #elif defined(PLATFORM_ANDROID)
1973 #elif !defined (SIGRTMIN)
1978 #endif /* SIGUSR1 */
1980 static int abort_signum = -1;
1982 if (abort_signum != -1)
1983 return abort_signum;
1984 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1985 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1986 struct sigaction sinfo;
1987 sigaction (i, NULL, &sinfo);
1988 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
1993 /* fallback to the old way */
1995 #endif /* HOST_WIN32 */
1999 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2001 MonoException* exc = mono_thread_request_interruption (FALSE);
2002 if (exc) mono_raise_exception (exc);
2004 #endif /* HOST_WIN32 */
2007 * signal_thread_state_change
2009 * Tells the thread that his state has changed and it has to enter the new
2010 * state as soon as possible.
2012 static void signal_thread_state_change (MonoInternalThread *thread)
2015 gpointer wait_handle;
2018 if (thread == mono_thread_internal_current ()) {
2019 /* Do it synchronously */
2020 MonoException *exc = mono_thread_request_interruption (FALSE);
2022 mono_raise_exception (exc);
2026 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, (ULONG_PTR)NULL);
2029 * This will cause waits to be broken.
2030 * It will also prevent the thread from entering a wait, so if the thread returns
2031 * from the wait before it receives the abort signal, it will just spin in the wait
2032 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2035 wait_handle = mono_thread_info_prepare_interrupt (thread->handle);
2037 /* fixme: store the state somewhere */
2038 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2040 mono_thread_info_finish_interrupt (wait_handle);
2041 #endif /* HOST_WIN32 */
2045 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2047 LOCK_THREAD (thread);
2049 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2050 (thread->state & ThreadState_StopRequested) != 0 ||
2051 (thread->state & ThreadState_Stopped) != 0)
2053 UNLOCK_THREAD (thread);
2057 if ((thread->state & ThreadState_Unstarted) != 0) {
2058 thread->state |= ThreadState_Aborted;
2059 UNLOCK_THREAD (thread);
2063 thread->state |= ThreadState_AbortRequested;
2064 if (thread->abort_state_handle)
2065 mono_gchandle_free (thread->abort_state_handle);
2067 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2068 g_assert (thread->abort_state_handle);
2070 thread->abort_state_handle = 0;
2072 thread->abort_exc = NULL;
2075 * abort_exc is set in mono_thread_execute_interruption(),
2076 * triggered by the call to signal_thread_state_change(),
2077 * below. There's a point between where we have
2078 * abort_state_handle set, but abort_exc NULL, but that's not
2082 UNLOCK_THREAD (thread);
2084 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2086 /* During shutdown, we can't wait for other threads */
2088 /* Make sure the thread is awake */
2089 mono_thread_resume (thread);
2091 abort_thread_internal (thread, TRUE, TRUE);
2095 ves_icall_System_Threading_Thread_ResetAbort (void)
2097 MonoInternalThread *thread = mono_thread_internal_current ();
2098 gboolean was_aborting;
2100 LOCK_THREAD (thread);
2101 was_aborting = thread->state & ThreadState_AbortRequested;
2102 thread->state &= ~ThreadState_AbortRequested;
2103 UNLOCK_THREAD (thread);
2105 if (!was_aborting) {
2106 const char *msg = "Unable to reset abort because no abort was requested";
2107 mono_raise_exception (mono_get_exception_thread_state (msg));
2109 thread->abort_exc = NULL;
2110 if (thread->abort_state_handle) {
2111 mono_gchandle_free (thread->abort_state_handle);
2112 /* This is actually not necessary - the handle
2113 only counts if the exception is set */
2114 thread->abort_state_handle = 0;
2119 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2121 LOCK_THREAD (thread);
2123 thread->state &= ~ThreadState_AbortRequested;
2125 if (thread->abort_exc) {
2126 thread->abort_exc = NULL;
2127 if (thread->abort_state_handle) {
2128 mono_gchandle_free (thread->abort_state_handle);
2129 /* This is actually not necessary - the handle
2130 only counts if the exception is set */
2131 thread->abort_state_handle = 0;
2135 UNLOCK_THREAD (thread);
2139 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2141 MonoInternalThread *thread = this->internal_thread;
2142 MonoObject *state, *deserialized = NULL, *exc;
2145 if (!thread->abort_state_handle)
2148 state = mono_gchandle_get_target (thread->abort_state_handle);
2151 domain = mono_domain_get ();
2152 if (mono_object_domain (state) == domain)
2155 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2157 if (!deserialized) {
2158 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2160 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2161 mono_raise_exception (invalid_op_exc);
2164 return deserialized;
2168 mono_thread_suspend (MonoInternalThread *thread)
2170 LOCK_THREAD (thread);
2172 if ((thread->state & ThreadState_Unstarted) != 0 ||
2173 (thread->state & ThreadState_Aborted) != 0 ||
2174 (thread->state & ThreadState_Stopped) != 0)
2176 UNLOCK_THREAD (thread);
2180 if ((thread->state & ThreadState_Suspended) != 0 ||
2181 (thread->state & ThreadState_SuspendRequested) != 0 ||
2182 (thread->state & ThreadState_StopRequested) != 0)
2184 UNLOCK_THREAD (thread);
2188 thread->state |= ThreadState_SuspendRequested;
2190 UNLOCK_THREAD (thread);
2192 suspend_thread_internal (thread, FALSE);
2197 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2199 if (!mono_thread_suspend (thread))
2200 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2204 mono_thread_resume (MonoInternalThread *thread)
2206 LOCK_THREAD (thread);
2208 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2209 thread->state &= ~ThreadState_SuspendRequested;
2210 UNLOCK_THREAD (thread);
2214 if ((thread->state & ThreadState_Suspended) == 0 ||
2215 (thread->state & ThreadState_Unstarted) != 0 ||
2216 (thread->state & ThreadState_Aborted) != 0 ||
2217 (thread->state & ThreadState_Stopped) != 0)
2219 UNLOCK_THREAD (thread);
2223 return resume_thread_internal (thread);
2227 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2229 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2230 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2234 mono_threads_is_critical_method (MonoMethod *method)
2236 switch (method->wrapper_type) {
2237 case MONO_WRAPPER_RUNTIME_INVOKE:
2238 case MONO_WRAPPER_XDOMAIN_INVOKE:
2239 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2246 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2251 if (mono_threads_is_critical_method (m)) {
2252 *((gboolean*)data) = TRUE;
2259 is_running_protected_wrapper (void)
2261 gboolean found = FALSE;
2262 mono_stack_walk (find_wrapper, &found);
2266 void mono_thread_internal_stop (MonoInternalThread *thread)
2268 LOCK_THREAD (thread);
2270 if ((thread->state & ThreadState_StopRequested) != 0 ||
2271 (thread->state & ThreadState_Stopped) != 0)
2273 UNLOCK_THREAD (thread);
2277 /* Make sure the thread is awake */
2278 mono_thread_resume (thread);
2280 thread->state |= ThreadState_StopRequested;
2281 thread->state &= ~ThreadState_AbortRequested;
2283 UNLOCK_THREAD (thread);
2285 abort_thread_internal (thread, TRUE, TRUE);
2288 void mono_thread_stop (MonoThread *thread)
2290 mono_thread_internal_stop (thread->internal_thread);
2294 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2297 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2302 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2305 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2310 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2313 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2318 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2321 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2326 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2329 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2330 return (void *) tmp;
2334 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2336 volatile MonoObject *tmp;
2337 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2338 return (MonoObject *) tmp;
2342 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2345 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2350 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2353 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2358 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2360 return InterlockedRead8 (ptr);
2364 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2366 return InterlockedRead16 (ptr);
2370 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2372 return InterlockedRead (ptr);
2376 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2378 #if SIZEOF_VOID_P == 4
2379 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2381 mono_interlocked_lock ();
2382 val = *(gint64*)ptr;
2383 mono_interlocked_unlock ();
2387 return InterlockedRead64 (ptr);
2391 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2393 return InterlockedReadPointer (ptr);
2397 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2401 #if SIZEOF_VOID_P == 4
2402 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2404 mono_interlocked_lock ();
2405 val = *(double*)ptr;
2406 mono_interlocked_unlock ();
2411 u.ival = InterlockedRead64 (ptr);
2417 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2421 u.ival = InterlockedRead (ptr);
2427 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2429 return InterlockedReadPointer (ptr);
2433 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2435 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2439 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2441 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2445 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2447 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2451 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2453 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2457 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2459 mono_atomic_store_release ((volatile void **) ptr, value);
2463 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2465 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2469 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2471 mono_atomic_store_release ((volatile double *) ptr, value);
2475 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2477 mono_atomic_store_release ((volatile float *) ptr, value);
2481 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2483 InterlockedWrite8 (ptr, value);
2487 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2489 InterlockedWrite16 (ptr, value);
2493 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2495 InterlockedWrite (ptr, value);
2499 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2501 #if SIZEOF_VOID_P == 4
2502 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2503 mono_interlocked_lock ();
2504 *(gint64*)ptr = value;
2505 mono_interlocked_unlock ();
2510 InterlockedWrite64 (ptr, value);
2514 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2516 InterlockedWritePointer (ptr, value);
2520 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2524 #if SIZEOF_VOID_P == 4
2525 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2526 mono_interlocked_lock ();
2527 *(double*)ptr = value;
2528 mono_interlocked_unlock ();
2535 InterlockedWrite64 (ptr, u.ival);
2539 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2545 InterlockedWrite (ptr, u.ival);
2549 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2551 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2555 mono_thread_init_tls (void)
2557 MONO_FAST_TLS_INIT (tls_current_object);
2558 mono_native_tls_alloc (¤t_object_key, NULL);
2561 void mono_thread_init (MonoThreadStartCB start_cb,
2562 MonoThreadAttachCB attach_cb)
2564 mono_mutex_init_recursive(&threads_mutex);
2565 mono_mutex_init_recursive(&interlocked_mutex);
2566 mono_mutex_init_recursive(&contexts_mutex);
2567 mono_mutex_init_recursive(&joinable_threads_mutex);
2569 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2570 g_assert(background_change_event != NULL);
2572 mono_init_static_data_info (&thread_static_info);
2573 mono_init_static_data_info (&context_static_info);
2575 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2577 mono_thread_start_cb = start_cb;
2578 mono_thread_attach_cb = attach_cb;
2580 /* Get a pseudo handle to the current process. This is just a
2581 * kludge so that wapi can build a process handle if needed.
2582 * As a pseudo handle is returned, we don't need to clean
2585 GetCurrentProcess ();
2588 void mono_thread_cleanup (void)
2590 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2591 MonoThreadInfo *info;
2593 /* The main thread must abandon any held mutexes (particularly
2594 * important for named mutexes as they are shared across
2595 * processes, see bug 74680.) This will happen when the
2596 * thread exits, but if it's not running in a subthread it
2597 * won't exit in time.
2599 info = mono_thread_info_current ();
2600 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2604 /* This stuff needs more testing, it seems one of these
2605 * critical sections can be locked when mono_thread_cleanup is
2608 mono_mutex_destroy (&threads_mutex);
2609 mono_mutex_destroy (&interlocked_mutex);
2610 mono_mutex_destroy (&contexts_mutex);
2611 mono_mutex_destroy (&delayed_free_table_mutex);
2612 mono_mutex_destroy (&small_id_mutex);
2613 CloseHandle (background_change_event);
2616 mono_native_tls_free (current_object_key);
2620 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2622 mono_thread_cleanup_fn = func;
2626 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2628 thread->internal_thread->manage_callback = func;
2631 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2633 mono_thread_notify_pending_exc_fn = func;
2637 static void print_tids (gpointer key, gpointer value, gpointer user)
2639 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2640 * sizeof(uint) and a cast to uint would overflow
2642 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2643 * print this as a pointer.
2645 g_message ("Waiting for: %p", key);
2650 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2651 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2655 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2659 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2661 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2663 if(ret==WAIT_FAILED) {
2664 /* See the comment in build_wait_tids() */
2665 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2669 for(i=0; i<wait->num; i++)
2670 CloseHandle (wait->handles[i]);
2672 if (ret == WAIT_TIMEOUT)
2675 for(i=0; i<wait->num; i++) {
2676 gsize tid = wait->threads[i]->tid;
2679 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2680 * it can still run io-layer etc. code. So wait for it to really exit.
2681 * FIXME: This won't join threads which are not in the joinable_hash yet.
2683 mono_thread_join ((gpointer)tid);
2685 mono_threads_lock ();
2686 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2687 /* This thread must have been killed, because
2688 * it hasn't cleaned itself up. (It's just
2689 * possible that the thread exited before the
2690 * parent thread had a chance to store the
2691 * handle, and now there is another pointer to
2692 * the already-exited thread stored. In this
2693 * case, we'll just get two
2694 * mono_profiler_thread_end() calls for the
2698 mono_threads_unlock ();
2699 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2700 thread_cleanup (wait->threads[i]);
2702 mono_threads_unlock ();
2707 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2709 guint32 i, ret, count;
2711 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2713 /* Add the thread state change event, so it wakes up if a thread changes
2714 * to background mode.
2717 if (count < MAXIMUM_WAIT_OBJECTS) {
2718 wait->handles [count] = background_change_event;
2722 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2724 if(ret==WAIT_FAILED) {
2725 /* See the comment in build_wait_tids() */
2726 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2730 for(i=0; i<wait->num; i++)
2731 CloseHandle (wait->handles[i]);
2733 if (ret == WAIT_TIMEOUT)
2736 if (ret < wait->num) {
2737 gsize tid = wait->threads[ret]->tid;
2738 mono_threads_lock ();
2739 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2740 /* See comment in wait_for_tids about thread cleanup */
2741 mono_threads_unlock ();
2742 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2743 thread_cleanup (wait->threads [ret]);
2745 mono_threads_unlock ();
2749 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2751 struct wait_data *wait=(struct wait_data *)user;
2753 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2755 MonoInternalThread *thread=(MonoInternalThread *)value;
2757 /* Ignore background threads, we abort them later */
2758 /* Do not lock here since it is not needed and the caller holds threads_lock */
2759 if (thread->state & ThreadState_Background) {
2760 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2761 return; /* just leave, ignore */
2764 if (mono_gc_is_finalizer_internal_thread (thread)) {
2765 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2769 if (thread == mono_thread_internal_current ()) {
2770 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2774 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2775 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2779 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2780 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2784 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2785 if (handle == NULL) {
2786 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2790 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2791 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2792 wait->handles[wait->num]=handle;
2793 wait->threads[wait->num]=thread;
2796 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2798 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2803 /* Just ignore the rest, we can't do anything with
2810 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2812 struct wait_data *wait=(struct wait_data *)user;
2813 gsize self = GetCurrentThreadId ();
2814 MonoInternalThread *thread = value;
2817 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2820 /* The finalizer thread is not a background thread */
2821 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2822 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2824 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2828 /* printf ("A: %d\n", wait->num); */
2829 wait->handles[wait->num]=thread->handle;
2830 wait->threads[wait->num]=thread;
2833 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2834 mono_thread_internal_stop (thread);
2838 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2842 * mono_threads_set_shutting_down:
2844 * Is called by a thread that wants to shut down Mono. If the runtime is already
2845 * shutting down, the calling thread is suspended/stopped, and this function never
2849 mono_threads_set_shutting_down (void)
2851 MonoInternalThread *current_thread = mono_thread_internal_current ();
2853 mono_threads_lock ();
2855 if (shutting_down) {
2856 mono_threads_unlock ();
2858 /* Make sure we're properly suspended/stopped */
2860 LOCK_THREAD (current_thread);
2862 if ((current_thread->state & ThreadState_SuspendRequested) ||
2863 (current_thread->state & ThreadState_AbortRequested) ||
2864 (current_thread->state & ThreadState_StopRequested)) {
2865 UNLOCK_THREAD (current_thread);
2866 mono_thread_execute_interruption (current_thread);
2868 current_thread->state |= ThreadState_Stopped;
2869 UNLOCK_THREAD (current_thread);
2872 /*since we're killing the thread, unset the current domain.*/
2873 mono_domain_unset ();
2875 /* Wake up other threads potentially waiting for us */
2876 mono_thread_info_exit ();
2878 shutting_down = TRUE;
2880 /* Not really a background state change, but this will
2881 * interrupt the main thread if it is waiting for all
2882 * the other threads.
2884 SetEvent (background_change_event);
2886 mono_threads_unlock ();
2890 void mono_thread_manage (void)
2892 struct wait_data wait_data;
2893 struct wait_data *wait = &wait_data;
2895 memset (wait, 0, sizeof (struct wait_data));
2896 /* join each thread that's still running */
2897 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2899 mono_threads_lock ();
2901 THREAD_DEBUG (g_message("%s: No threads", __func__));
2902 mono_threads_unlock ();
2905 mono_threads_unlock ();
2908 mono_threads_lock ();
2909 if (shutting_down) {
2910 /* somebody else is shutting down */
2911 mono_threads_unlock ();
2914 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2915 mono_g_hash_table_foreach (threads, print_tids, NULL));
2917 ResetEvent (background_change_event);
2919 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2920 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2921 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2922 mono_threads_unlock ();
2924 /* Something to wait for */
2925 wait_for_tids_or_state_change (wait, INFINITE);
2927 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2928 } while(wait->num>0);
2930 /* Mono is shutting down, so just wait for the end */
2931 if (!mono_runtime_try_shutdown ()) {
2932 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2933 mono_thread_suspend (mono_thread_internal_current ());
2934 mono_thread_execute_interruption (mono_thread_internal_current ());
2938 * Remove everything but the finalizer thread and self.
2939 * Also abort all the background threads
2942 mono_threads_lock ();
2945 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2946 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2947 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2949 mono_threads_unlock ();
2951 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2953 /* Something to wait for */
2954 wait_for_tids (wait, INFINITE);
2956 } while (wait->num > 0);
2959 * give the subthreads a chance to really quit (this is mainly needed
2960 * to get correct user and system times from getrusage/wait/time(1)).
2961 * This could be removed if we avoid pthread_detach() and use pthread_join().
2963 mono_thread_info_yield ();
2966 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2968 MonoInternalThread *thread=(MonoInternalThread *)value;
2970 if(thread->tid != (gsize)user) {
2971 /*TerminateThread (thread->handle, -1);*/
2975 void mono_thread_abort_all_other_threads (void)
2977 gsize self = GetCurrentThreadId ();
2979 mono_threads_lock ();
2980 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2981 mono_g_hash_table_size (threads));
2982 mono_g_hash_table_foreach (threads, print_tids, NULL));
2984 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2986 mono_threads_unlock ();
2990 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2992 MonoInternalThread *thread = (MonoInternalThread*)value;
2993 struct wait_data *wait = (struct wait_data*)user_data;
2997 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2999 * This needs no locking.
3001 if ((thread->state & ThreadState_Suspended) != 0 ||
3002 (thread->state & ThreadState_Stopped) != 0)
3005 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3006 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3010 wait->handles [wait->num] = handle;
3011 wait->threads [wait->num] = thread;
3017 * mono_thread_suspend_all_other_threads:
3019 * Suspend all managed threads except the finalizer thread and this thread. It is
3020 * not possible to resume them later.
3022 void mono_thread_suspend_all_other_threads (void)
3024 struct wait_data wait_data;
3025 struct wait_data *wait = &wait_data;
3027 gsize self = GetCurrentThreadId ();
3029 guint32 eventidx = 0;
3030 gboolean starting, finished;
3032 memset (wait, 0, sizeof (struct wait_data));
3034 * The other threads could be in an arbitrary state at this point, i.e.
3035 * they could be starting up, shutting down etc. This means that there could be
3036 * threads which are not even in the threads hash table yet.
3040 * First we set a barrier which will be checked by all threads before they
3041 * are added to the threads hash table, and they will exit if the flag is set.
3042 * This ensures that no threads could be added to the hash later.
3043 * We will use shutting_down as the barrier for now.
3045 g_assert (shutting_down);
3048 * We make multiple calls to WaitForMultipleObjects since:
3049 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3050 * - some threads could exit without becoming suspended
3055 * Make a copy of the hashtable since we can't do anything with
3056 * threads while threads_mutex is held.
3059 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3060 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3061 mono_threads_lock ();
3062 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3063 mono_threads_unlock ();
3065 events = g_new0 (gpointer, wait->num);
3067 /* Get the suspended events that we'll be waiting for */
3068 for (i = 0; i < wait->num; ++i) {
3069 MonoInternalThread *thread = wait->threads [i];
3070 gboolean signal_suspend = FALSE;
3072 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3073 //CloseHandle (wait->handles [i]);
3074 wait->threads [i] = NULL; /* ignore this thread in next loop */
3078 LOCK_THREAD (thread);
3080 if (thread->suspended_event == NULL) {
3081 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3082 if (thread->suspended_event == NULL) {
3083 /* Forget this one and go on to the next */
3084 UNLOCK_THREAD (thread);
3089 if ((thread->state & ThreadState_Suspended) != 0 ||
3090 (thread->state & ThreadState_StopRequested) != 0 ||
3091 (thread->state & ThreadState_Stopped) != 0) {
3092 UNLOCK_THREAD (thread);
3093 CloseHandle (wait->handles [i]);
3094 wait->threads [i] = NULL; /* ignore this thread in next loop */
3098 if ((thread->state & ThreadState_SuspendRequested) == 0)
3099 signal_suspend = TRUE;
3101 events [eventidx++] = thread->suspended_event;
3103 /* Convert abort requests into suspend requests */
3104 if ((thread->state & ThreadState_AbortRequested) != 0)
3105 thread->state &= ~ThreadState_AbortRequested;
3107 thread->state |= ThreadState_SuspendRequested;
3109 UNLOCK_THREAD (thread);
3111 /* Signal the thread to suspend */
3112 if (mono_thread_info_new_interrupt_enabled ())
3113 suspend_thread_internal (thread, TRUE);
3114 else if (signal_suspend)
3115 signal_thread_state_change (thread);
3118 /*Only wait on the suspend event if we are using the old path */
3119 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3120 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3121 for (i = 0; i < wait->num; ++i) {
3122 MonoInternalThread *thread = wait->threads [i];
3127 LOCK_THREAD (thread);
3128 if ((thread->state & ThreadState_Suspended) != 0) {
3129 CloseHandle (thread->suspended_event);
3130 thread->suspended_event = NULL;
3132 UNLOCK_THREAD (thread);
3136 if (eventidx <= 0) {
3138 * If there are threads which are starting up, we wait until they
3139 * are suspended when they try to register in the threads hash.
3140 * This is guaranteed to finish, since the threads which can create new
3141 * threads get suspended after a while.
3142 * FIXME: The finalizer thread can still create new threads.
3144 mono_threads_lock ();
3145 if (threads_starting_up)
3146 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3149 mono_threads_unlock ();
3161 collect_threads (gpointer key, gpointer value, gpointer user_data)
3163 MonoInternalThread *thread = (MonoInternalThread*)value;
3164 struct wait_data *wait = (struct wait_data*)user_data;
3167 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3168 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3172 wait->handles [wait->num] = handle;
3173 wait->threads [wait->num] = thread;
3178 static gboolean thread_dump_requested;
3180 static G_GNUC_UNUSED gboolean
3181 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3183 GString *p = (GString*)data;
3184 MonoMethod *method = NULL;
3186 method = mono_jit_info_get_method (frame->ji);
3189 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3190 g_string_append_printf (p, " %s\n", location);
3193 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3199 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3201 GString* text = g_string_new (0);
3203 GError *error = NULL;
3206 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3208 g_string_append_printf (text, "\n\"%s\"", name);
3211 else if (thread->threadpool_thread)
3212 g_string_append (text, "\n\"<threadpool thread>\"");
3214 g_string_append (text, "\n\"<unnamed thread>\"");
3217 /* This no longer works with remote unwinding */
3219 wapi_desc = wapi_current_thread_desc ();
3220 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3225 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3226 mono_thread_info_finish_suspend_and_resume (info);
3228 fprintf (stdout, "%s", text->str);
3230 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3231 OutputDebugStringA(text->str);
3234 g_string_free (text, TRUE);
3239 dump_thread (gpointer key, gpointer value, gpointer user)
3241 MonoInternalThread *thread = (MonoInternalThread *)value;
3242 MonoThreadInfo *info;
3244 if (thread == mono_thread_internal_current ())
3248 FIXME This still can hang if we stop a thread during malloc.
3249 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3250 that takes a callback and runs it with the target suspended.
3251 We probably should loop a bit around trying to get it to either managed code
3254 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3259 print_thread_dump (thread, info);
3263 mono_threads_perform_thread_dump (void)
3265 if (!thread_dump_requested)
3268 printf ("Full thread dump:\n");
3270 /* We take the loader lock and the root domain lock as to increase our odds of not deadlocking if
3271 something needs then in the process.
3273 mono_loader_lock ();
3274 mono_domain_lock (mono_get_root_domain ());
3276 mono_threads_lock ();
3277 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3278 mono_threads_unlock ();
3280 mono_domain_unlock (mono_get_root_domain ());
3281 mono_loader_unlock ();
3283 thread_dump_requested = FALSE;
3287 * mono_threads_request_thread_dump:
3289 * Ask all threads except the current to print their stacktrace to stdout.
3292 mono_threads_request_thread_dump (void)
3294 struct wait_data wait_data;
3295 struct wait_data *wait = &wait_data;
3298 /*The new thread dump code runs out of the finalizer thread. */
3299 if (mono_thread_info_new_interrupt_enabled ()) {
3300 thread_dump_requested = TRUE;
3301 mono_gc_finalize_notify ();
3306 memset (wait, 0, sizeof (struct wait_data));
3309 * Make a copy of the hashtable since we can't do anything with
3310 * threads while threads_mutex is held.
3312 mono_threads_lock ();
3313 mono_g_hash_table_foreach (threads, collect_threads, wait);
3314 mono_threads_unlock ();
3316 for (i = 0; i < wait->num; ++i) {
3317 MonoInternalThread *thread = wait->threads [i];
3319 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3320 (thread != mono_thread_internal_current ()) &&
3321 !thread->thread_dump_requested) {
3322 thread->thread_dump_requested = TRUE;
3324 signal_thread_state_change (thread);
3327 CloseHandle (wait->handles [i]);
3333 gint allocated; /* +1 so that refs [allocated] == NULL */
3337 typedef struct ref_stack RefStack;
3340 ref_stack_new (gint initial_size)
3344 initial_size = MAX (initial_size, 16) + 1;
3345 rs = g_new0 (RefStack, 1);
3346 rs->refs = g_new0 (gpointer, initial_size);
3347 rs->allocated = initial_size;
3352 ref_stack_destroy (gpointer ptr)
3363 ref_stack_push (RefStack *rs, gpointer ptr)
3365 g_assert (rs != NULL);
3367 if (rs->bottom >= rs->allocated) {
3368 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3369 rs->allocated <<= 1;
3370 rs->refs [rs->allocated] = NULL;
3372 rs->refs [rs->bottom++] = ptr;
3376 ref_stack_pop (RefStack *rs)
3378 if (rs == NULL || rs->bottom == 0)
3382 rs->refs [rs->bottom] = NULL;
3386 ref_stack_find (RefStack *rs, gpointer ptr)
3393 for (refs = rs->refs; refs && *refs; refs++) {
3401 * mono_thread_push_appdomain_ref:
3403 * Register that the current thread may have references to objects in domain
3404 * @domain on its stack. Each call to this function should be paired with a
3405 * call to pop_appdomain_ref.
3408 mono_thread_push_appdomain_ref (MonoDomain *domain)
3410 MonoInternalThread *thread = mono_thread_internal_current ();
3413 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3414 SPIN_LOCK (thread->lock_thread_id);
3415 if (thread->appdomain_refs == NULL)
3416 thread->appdomain_refs = ref_stack_new (16);
3417 ref_stack_push (thread->appdomain_refs, domain);
3418 SPIN_UNLOCK (thread->lock_thread_id);
3423 mono_thread_pop_appdomain_ref (void)
3425 MonoInternalThread *thread = mono_thread_internal_current ();
3428 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3429 SPIN_LOCK (thread->lock_thread_id);
3430 ref_stack_pop (thread->appdomain_refs);
3431 SPIN_UNLOCK (thread->lock_thread_id);
3436 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3439 SPIN_LOCK (thread->lock_thread_id);
3440 res = ref_stack_find (thread->appdomain_refs, domain);
3441 SPIN_UNLOCK (thread->lock_thread_id);
3446 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3448 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3451 typedef struct abort_appdomain_data {
3452 struct wait_data wait;
3454 } abort_appdomain_data;
3457 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3459 MonoInternalThread *thread = (MonoInternalThread*)value;
3460 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3461 MonoDomain *domain = data->domain;
3463 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3464 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3466 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3467 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3470 data->wait.handles [data->wait.num] = handle;
3471 data->wait.threads [data->wait.num] = thread;
3474 /* Just ignore the rest, we can't do anything with
3482 * mono_threads_abort_appdomain_threads:
3484 * Abort threads which has references to the given appdomain.
3487 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3489 #ifdef __native_client__
3493 abort_appdomain_data user_data;
3495 int orig_timeout = timeout;
3498 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3500 start_time = mono_msec_ticks ();
3502 mono_threads_lock ();
3504 user_data.domain = domain;
3505 user_data.wait.num = 0;
3506 /* This shouldn't take any locks */
3507 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3508 mono_threads_unlock ();
3510 if (user_data.wait.num > 0) {
3511 /* Abort the threads outside the threads lock */
3512 for (i = 0; i < user_data.wait.num; ++i)
3513 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3516 * We should wait for the threads either to abort, or to leave the
3517 * domain. We can't do the latter, so we wait with a timeout.
3519 wait_for_tids (&user_data.wait, 100);
3522 /* Update remaining time */
3523 timeout -= mono_msec_ticks () - start_time;
3524 start_time = mono_msec_ticks ();
3526 if (orig_timeout != -1 && timeout < 0)
3529 while (user_data.wait.num > 0);
3531 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3537 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3539 MonoInternalThread *thread = (MonoInternalThread*)value;
3540 MonoDomain *domain = (MonoDomain*)user_data;
3543 /* No locking needed here */
3544 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3546 if (thread->cached_culture_info) {
3547 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3548 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3549 if (obj && obj->vtable->domain == domain)
3550 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3556 * mono_threads_clear_cached_culture:
3558 * Clear the cached_current_culture from all threads if it is in the
3562 mono_threads_clear_cached_culture (MonoDomain *domain)
3564 mono_threads_lock ();
3565 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3566 mono_threads_unlock ();
3570 * mono_thread_get_undeniable_exception:
3572 * Return an exception which needs to be raised when leaving a catch clause.
3573 * This is used for undeniable exception propagation.
3576 mono_thread_get_undeniable_exception (void)
3578 MonoInternalThread *thread = mono_thread_internal_current ();
3580 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3582 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3583 * exception if the thread no longer references a dying appdomain.
3585 thread->abort_exc->trace_ips = NULL;
3586 thread->abort_exc->stack_trace = NULL;
3587 return thread->abort_exc;
3593 #if MONO_SMALL_CONFIG
3594 #define NUM_STATIC_DATA_IDX 4
3595 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3599 #define NUM_STATIC_DATA_IDX 8
3600 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3601 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3605 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3608 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3611 gpointer *static_data = addr;
3612 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3615 if (!static_data [i])
3617 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3618 ptr = static_data [i];
3619 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3620 uintptr_t bmap = static_reference_bitmaps [i][j];
3623 if ((bmap & 1) && *p) {
3624 mark_func (p, gc_data);
3634 * mono_alloc_static_data
3636 * Allocate memory blocks for storing threads or context static data
3639 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3641 guint idx = (offset >> 24) - 1;
3644 gpointer* static_data = *static_data_ptr;
3646 static void* tls_desc = NULL;
3647 if (mono_gc_user_markers_supported () && !tls_desc)
3648 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3649 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3650 *static_data_ptr = static_data;
3651 static_data [0] = static_data;
3654 for (i = 1; i <= idx; ++i) {
3655 if (static_data [i])
3657 if (mono_gc_user_markers_supported () && threadlocal)
3658 static_data [i] = g_malloc0 (static_data_size [i]);
3660 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3665 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3668 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3669 gpointer p = static_data [i];
3673 * At this point, the static data pointer array is still registered with the
3674 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3675 * data. Freeing the individual arrays without first nulling their slots
3676 * would make it possible for mark_tls_slots() to encounter a pointer to
3677 * such an already freed array. See bug #13813.
3679 static_data [i] = NULL;
3680 mono_memory_write_barrier ();
3681 if (mono_gc_user_markers_supported () && threadlocal)
3684 mono_gc_free_fixed (p);
3686 mono_gc_free_fixed (static_data);
3690 * mono_init_static_data_info
3692 * Initializes static data counters
3694 static void mono_init_static_data_info (StaticDataInfo *static_data)
3696 static_data->idx = 0;
3697 static_data->offset = 0;
3698 static_data->freelist = NULL;
3702 * mono_alloc_static_data_slot
3704 * Generates an offset for static data. static_data contains the counters
3705 * used to generate it.
3708 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3712 if (!static_data->idx && !static_data->offset) {
3714 * we use the first chunk of the first allocation also as
3715 * an array for the rest of the data
3717 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3719 static_data->offset += align - 1;
3720 static_data->offset &= ~(align - 1);
3721 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3722 static_data->idx ++;
3723 g_assert (size <= static_data_size [static_data->idx]);
3724 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3725 static_data->offset = 0;
3727 offset = static_data->offset | ((static_data->idx + 1) << 24);
3728 static_data->offset += size;
3733 * ensure thread static fields already allocated are valid for thread
3734 * This function is called when a thread is created or on thread attach.
3737 thread_adjust_static_data (MonoInternalThread *thread)
3741 mono_threads_lock ();
3742 if (thread_static_info.offset || thread_static_info.idx > 0) {
3743 /* get the current allocated size */
3744 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3745 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3747 mono_threads_unlock ();
3751 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3753 MonoInternalThread *thread = value;
3754 guint32 offset = GPOINTER_TO_UINT (user);
3756 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3759 static MonoThreadDomainTls*
3760 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3762 MonoThreadDomainTls* prev = NULL;
3763 MonoThreadDomainTls* tmp = static_data->freelist;
3765 if (tmp->size == size) {
3767 prev->next = tmp->next;
3769 static_data->freelist = tmp->next;
3778 #if SIZEOF_VOID_P == 4
3785 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3788 int idx = (offset >> 24) - 1;
3790 if (!static_reference_bitmaps [idx])
3791 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3792 rb = static_reference_bitmaps [idx];
3794 offset /= sizeof (gpointer);
3795 /* offset is now the bitmap offset */
3796 for (i = 0; i < numbits; ++i) {
3797 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3798 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (ONE_P << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3803 clear_reference_bitmap (guint32 offset, guint32 size)
3805 int idx = (offset >> 24) - 1;
3807 rb = static_reference_bitmaps [idx];
3809 offset /= sizeof (gpointer);
3810 size /= sizeof (gpointer);
3812 /* offset is now the bitmap offset */
3813 for (; offset < size; ++offset)
3814 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3818 * The offset for a special static variable is composed of three parts:
3819 * a bit that indicates the type of static data (0:thread, 1:context),
3820 * an index in the array of chunks of memory for the thread (thread->static_data)
3821 * and an offset in that chunk of mem. This allows allocating less memory in the
3826 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3829 if (static_type == SPECIAL_STATIC_THREAD) {
3830 MonoThreadDomainTls *item;
3831 mono_threads_lock ();
3832 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3833 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3835 offset = item->offset;
3838 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3840 update_tls_reference_bitmap (offset, bitmap, numbits);
3841 /* This can be called during startup */
3842 if (threads != NULL)
3843 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3844 mono_threads_unlock ();
3846 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3847 mono_contexts_lock ();
3848 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3849 mono_contexts_unlock ();
3850 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3856 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3858 /* The high bit means either thread (0) or static (1) data. */
3860 guint32 static_type = (offset & 0x80000000);
3863 offset &= 0x7fffffff;
3864 idx = (offset >> 24) - 1;
3866 if (static_type == 0) {
3867 return get_thread_static_data (thread, offset);
3869 /* Allocate static data block under demand, since we don't have a list
3872 MonoAppContext *context = mono_context_get ();
3873 if (!context->static_data || !context->static_data [idx]) {
3874 mono_contexts_lock ();
3875 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3876 mono_contexts_unlock ();
3878 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3883 mono_get_special_static_data (guint32 offset)
3885 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3894 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3896 MonoInternalThread *thread = value;
3897 TlsOffsetSize *data = user;
3898 int idx = (data->offset >> 24) - 1;
3901 if (!thread->static_data || !thread->static_data [idx])
3903 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3904 mono_gc_bzero_atomic (ptr, data->size);
3908 do_free_special_slot (guint32 offset, guint32 size)
3910 guint32 static_type = (offset & 0x80000000);
3911 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3912 if (static_type == 0) {
3914 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3915 data.offset = offset & 0x7fffffff;
3917 clear_reference_bitmap (data.offset, data.size);
3918 if (threads != NULL)
3919 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3920 item->offset = offset;
3923 if (!mono_runtime_is_shutting_down ()) {
3924 item->next = thread_static_info.freelist;
3925 thread_static_info.freelist = item;
3927 /* We could be called during shutdown after mono_thread_cleanup () is called */
3931 /* FIXME: free context static data as well */
3936 do_free_special (gpointer key, gpointer value, gpointer data)
3938 MonoClassField *field = key;
3939 guint32 offset = GPOINTER_TO_UINT (value);
3942 size = mono_type_size (field->type, &align);
3943 do_free_special_slot (offset, size);
3947 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3949 mono_threads_lock ();
3950 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3951 mono_threads_unlock ();
3955 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3957 mono_threads_lock ();
3958 do_free_special_slot (offset, size);
3959 mono_threads_unlock ();
3963 * allocates room in the thread local area for storing an instance of the struct type
3964 * the allocation is kept track of in domain->tlsrec_list.
3967 mono_thread_alloc_tls (MonoReflectionType *type)
3969 MonoDomain *domain = mono_domain_get ();
3971 MonoTlsDataRecord *tlsrec;
3974 gsize default_bitmap [4] = {0};
3975 uint32_t tls_offset;
3979 klass = mono_class_from_mono_type (type->type);
3980 /* TlsDatum is a struct, so we subtract the object header size offset */
3981 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3982 size = mono_type_size (type->type, &align);
3983 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3984 if (bitmap != default_bitmap)
3986 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3987 tlsrec->tls_offset = tls_offset;
3988 tlsrec->size = size;
3989 mono_domain_lock (domain);
3990 tlsrec->next = domain->tlsrec_list;
3991 domain->tlsrec_list = tlsrec;
3992 mono_domain_unlock (domain);
3997 mono_thread_destroy_tls (uint32_t tls_offset)
3999 MonoTlsDataRecord *prev = NULL;
4000 MonoTlsDataRecord *cur;
4002 MonoDomain *domain = mono_domain_get ();
4003 mono_domain_lock (domain);
4004 cur = domain->tlsrec_list;
4006 if (cur->tls_offset == tls_offset) {
4008 prev->next = cur->next;
4010 domain->tlsrec_list = cur->next;
4018 mono_domain_unlock (domain);
4020 mono_special_static_data_free_slot (tls_offset, size);
4024 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4027 mono_thread_destroy_domain_tls (MonoDomain *domain)
4029 while (domain->tlsrec_list)
4030 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
4033 static MonoClassField *local_slots = NULL;
4036 /* local tls data to get locals_slot from a thread */
4039 /* index in the locals_slot array */
4044 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4046 LocalSlotID *sid = user_data;
4047 MonoInternalThread *thread = (MonoInternalThread*)value;
4048 MonoArray *slots_array;
4050 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4051 * it is for the right domain, so we need to check if it is allocated an initialized
4052 * for the current thread.
4054 /*g_print ("handling thread %p\n", thread);*/
4055 if (!thread->static_data || !thread->static_data [sid->idx])
4057 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4058 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4060 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4064 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4072 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4074 g_warning ("local_slots field not found in Thread class");
4078 domain = mono_domain_get ();
4079 mono_domain_lock (domain);
4080 if (domain->special_static_fields)
4081 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4082 mono_domain_unlock (domain);
4085 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4086 sid.offset = GPOINTER_TO_UINT (addr);
4087 sid.offset &= 0x7fffffff;
4088 sid.idx = (sid.offset >> 24) - 1;
4089 mono_threads_lock ();
4090 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4091 mono_threads_unlock ();
4093 /* FIXME: clear the slot for MonoAppContexts, too */
4098 static void CALLBACK dummy_apc (ULONG_PTR param)
4104 * mono_thread_execute_interruption
4106 * Performs the operation that the requested thread state requires (abort,
4109 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4111 LOCK_THREAD (thread);
4113 /* MonoThread::interruption_requested can only be changed with atomics */
4114 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4115 /* this will consume pending APC calls */
4117 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4119 InterlockedDecrement (&thread_interruption_requested);
4120 /* Clear the interrupted flag of the thread so it can wait again */
4121 mono_thread_info_clear_interruption ();
4124 if ((thread->state & ThreadState_AbortRequested) != 0) {
4125 UNLOCK_THREAD (thread);
4126 if (thread->abort_exc == NULL) {
4128 * This might be racy, but it has to be called outside the lock
4129 * since it calls managed code.
4131 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4133 return thread->abort_exc;
4135 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4136 self_suspend_internal (thread);
4139 else if ((thread->state & ThreadState_StopRequested) != 0) {
4140 /* FIXME: do this through the JIT? */
4142 UNLOCK_THREAD (thread);
4144 mono_thread_exit ();
4146 } else if (thread->pending_exception) {
4149 exc = thread->pending_exception;
4150 thread->pending_exception = NULL;
4152 UNLOCK_THREAD (thread);
4154 } else if (thread->thread_interrupt_requested) {
4156 thread->thread_interrupt_requested = FALSE;
4157 UNLOCK_THREAD (thread);
4159 return(mono_get_exception_thread_interrupted ());
4162 UNLOCK_THREAD (thread);
4168 * mono_thread_request_interruption
4170 * A signal handler can call this method to request the interruption of a
4171 * thread. The result of the interruption will depend on the current state of
4172 * the thread. If the result is an exception that needs to be throw, it is
4173 * provided as return value.
4176 mono_thread_request_interruption (gboolean running_managed)
4178 MonoInternalThread *thread = mono_thread_internal_current ();
4180 /* The thread may already be stopping */
4185 if (thread->interrupt_on_stop &&
4186 thread->state & ThreadState_StopRequested &&
4187 thread->state & ThreadState_Background)
4191 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4193 InterlockedIncrement (&thread_interruption_requested);
4195 if (!running_managed || is_running_protected_wrapper ()) {
4196 /* Can't stop while in unmanaged code. Increase the global interruption
4197 request count. When exiting the unmanaged method the count will be
4198 checked and the thread will be interrupted. */
4200 if (mono_thread_notify_pending_exc_fn && !running_managed)
4201 /* The JIT will notify the thread about the interruption */
4202 /* This shouldn't take any locks */
4203 mono_thread_notify_pending_exc_fn (NULL);
4205 /* this will awake the thread if it is in WaitForSingleObject
4207 /* Our implementation of this function ignores the func argument */
4209 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4211 mono_thread_info_self_interrupt ();
4216 return mono_thread_execute_interruption (thread);
4220 /*This function should be called by a thread after it has exited all of
4221 * its handle blocks at interruption time.*/
4223 mono_thread_resume_interruption (void)
4225 MonoInternalThread *thread = mono_thread_internal_current ();
4226 gboolean still_aborting;
4228 /* The thread may already be stopping */
4232 LOCK_THREAD (thread);
4233 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4234 UNLOCK_THREAD (thread);
4236 /*This can happen if the protected block called Thread::ResetAbort*/
4237 if (!still_aborting)
4240 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4242 InterlockedIncrement (&thread_interruption_requested);
4244 mono_thread_info_self_interrupt ();
4246 return mono_thread_execute_interruption (thread);
4249 gboolean mono_thread_interruption_requested ()
4251 if (thread_interruption_requested) {
4252 MonoInternalThread *thread = mono_thread_internal_current ();
4253 /* The thread may already be stopping */
4255 return (thread->interruption_requested);
4260 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4262 MonoInternalThread *thread = mono_thread_internal_current ();
4264 /* The thread may already be stopping */
4268 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4269 MonoException* exc = mono_thread_execute_interruption (thread);
4270 if (exc) mono_raise_exception (exc);
4275 * Performs the interruption of the current thread, if one has been requested,
4276 * and the thread is not running a protected wrapper.
4278 void mono_thread_interruption_checkpoint ()
4280 mono_thread_interruption_checkpoint_request (FALSE);
4284 * Performs the interruption of the current thread, if one has been requested.
4286 void mono_thread_force_interruption_checkpoint ()
4288 mono_thread_interruption_checkpoint_request (TRUE);
4292 * mono_thread_get_and_clear_pending_exception:
4294 * Return any pending exceptions for the current thread and clear it as a side effect.
4297 mono_thread_get_and_clear_pending_exception (void)
4299 MonoInternalThread *thread = mono_thread_internal_current ();
4301 /* The thread may already be stopping */
4305 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4306 return mono_thread_execute_interruption (thread);
4309 if (thread->pending_exception) {
4310 MonoException *exc = thread->pending_exception;
4312 thread->pending_exception = NULL;
4320 * mono_set_pending_exception:
4322 * Set the pending exception of the current thread to EXC.
4323 * The exception will be thrown when execution returns to managed code.
4326 mono_set_pending_exception (MonoException *exc)
4328 MonoInternalThread *thread = mono_thread_internal_current ();
4330 /* The thread may already be stopping */
4334 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4336 mono_thread_request_interruption (FALSE);
4340 * mono_thread_interruption_request_flag:
4342 * Returns the address of a flag that will be non-zero if an interruption has
4343 * been requested for a thread. The thread to interrupt may not be the current
4344 * thread, so an additional call to mono_thread_interruption_requested() or
4345 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4348 gint32* mono_thread_interruption_request_flag ()
4350 return &thread_interruption_requested;
4354 mono_thread_init_apartment_state (void)
4357 MonoInternalThread* thread = mono_thread_internal_current ();
4359 /* Positive return value indicates success, either
4360 * S_OK if this is first CoInitialize call, or
4361 * S_FALSE if CoInitialize already called, but with same
4362 * threading model. A negative value indicates failure,
4363 * probably due to trying to change the threading model.
4365 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4366 ? COINIT_APARTMENTTHREADED
4367 : COINIT_MULTITHREADED) < 0) {
4368 thread->apartment_state = ThreadApartmentState_Unknown;
4374 mono_thread_cleanup_apartment_state (void)
4377 MonoInternalThread* thread = mono_thread_internal_current ();
4379 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4386 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4388 LOCK_THREAD (thread);
4389 thread->state |= state;
4390 UNLOCK_THREAD (thread);
4394 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4396 LOCK_THREAD (thread);
4397 thread->state &= ~state;
4398 UNLOCK_THREAD (thread);
4402 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4404 gboolean ret = FALSE;
4406 LOCK_THREAD (thread);
4408 if ((thread->state & test) != 0) {
4412 UNLOCK_THREAD (thread);
4417 //static MonoClassField *execution_context_field;
4420 get_execution_context_addr (void)
4422 MonoDomain *domain = mono_domain_get ();
4423 guint32 offset = domain->execution_context_field_offset;
4426 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4429 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4431 mono_domain_lock (domain);
4432 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4433 mono_domain_unlock (domain);
4436 domain->execution_context_field_offset = offset;
4439 return (MonoObject**) mono_get_special_static_data (offset);
4443 mono_thread_get_execution_context (void)
4445 return *get_execution_context_addr ();
4449 mono_thread_set_execution_context (MonoObject *ec)
4451 *get_execution_context_addr () = ec;
4454 static gboolean has_tls_get = FALSE;
4457 mono_runtime_set_has_tls_get (gboolean val)
4463 mono_runtime_has_tls_get (void)
4469 mono_thread_kill (MonoInternalThread *thread, int signal)
4471 #ifdef __native_client__
4472 /* Workaround pthread_kill abort() in NaCl glibc. */
4476 /* Win32 uses QueueUserAPC and callers of this are guarded */
4477 g_assert_not_reached ();
4479 # ifdef PTHREAD_POINTER_ID
4480 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4482 # ifdef USE_TKILL_ON_ANDROID
4483 if (thread->android_tid != 0) {
4485 int old_errno = errno;
4487 ret = tkill ((pid_t) thread->android_tid, signal);
4496 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4498 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4505 self_interrupt_thread (void *_unused)
4507 MonoThreadInfo *info = mono_thread_info_current ();
4508 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4509 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4510 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4511 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4515 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4519 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4523 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4525 MonoJitInfo **dest = data;
4531 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4533 MonoJitInfo *ji = NULL;
4536 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4541 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4544 MonoThreadInfo *info = NULL;
4545 gboolean protected_wrapper;
4546 gboolean running_managed;
4548 if (!mono_thread_info_new_interrupt_enabled ()) {
4549 signal_thread_state_change (thread);
4554 FIXME this is insanely broken, it doesn't cause interruption to happen
4555 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4557 if (thread == mono_thread_internal_current ()) {
4558 /* Do it synchronously */
4559 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4561 mono_raise_exception (exc);
4562 mono_thread_info_interrupt (thread->handle);
4566 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4567 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4571 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4572 mono_thread_info_finish_suspend_and_resume (info);
4576 /*someone is already interrupting it*/
4577 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4578 mono_thread_info_finish_suspend_and_resume (info);
4581 InterlockedIncrement (&thread_interruption_requested);
4583 ji = mono_thread_info_get_last_managed (info);
4584 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4585 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4587 if (!protected_wrapper && running_managed) {
4588 /*We are in managed code*/
4589 /*Set the thread to call */
4590 if (install_async_abort)
4591 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4592 mono_thread_info_finish_suspend_and_resume (info);
4595 * This will cause waits to be broken.
4596 * It will also prevent the thread from entering a wait, so if the thread returns
4597 * from the wait before it receives the abort signal, it will just spin in the wait
4598 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4601 gpointer interrupt_handle;
4603 if (mono_thread_notify_pending_exc_fn)
4604 /* The JIT will notify the thread about the interruption */
4605 mono_thread_notify_pending_exc_fn (info);
4607 interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4608 mono_thread_info_finish_suspend_and_resume (info);
4609 mono_thread_info_finish_interrupt (interrupt_handle);
4611 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4615 transition_to_suspended (MonoInternalThread *thread, MonoThreadInfo *info)
4617 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4618 g_assert (0); /*FIXME we should not reach this */
4619 /*Make sure we balance the suspend count.*/
4621 mono_thread_info_finish_suspend_and_resume (info);
4623 thread->state &= ~ThreadState_SuspendRequested;
4624 thread->state |= ThreadState_Suspended;
4626 mono_thread_info_finish_suspend (info);
4628 UNLOCK_THREAD (thread);
4632 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4634 if (!mono_thread_info_new_interrupt_enabled ()) {
4635 signal_thread_state_change (thread);
4639 LOCK_THREAD (thread);
4640 if (thread == mono_thread_internal_current ()) {
4641 transition_to_suspended (thread, NULL);
4642 mono_thread_info_self_suspend ();
4644 MonoThreadInfo *info;
4646 gboolean protected_wrapper;
4647 gboolean running_managed;
4649 /*A null info usually means the thread is already dead. */
4650 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4651 UNLOCK_THREAD (thread);
4655 ji = mono_thread_info_get_last_managed (info);
4656 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4657 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4659 if (running_managed && !protected_wrapper) {
4660 transition_to_suspended (thread, info);
4662 gpointer interrupt_handle;
4664 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4665 InterlockedIncrement (&thread_interruption_requested);
4667 interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4668 if (mono_thread_notify_pending_exc_fn && !running_managed)
4669 /* The JIT will notify the thread about the interruption */
4670 mono_thread_notify_pending_exc_fn (info);
4671 mono_thread_info_finish_suspend_and_resume (info);
4673 mono_thread_info_finish_interrupt (interrupt_handle);
4674 UNLOCK_THREAD (thread);
4679 /*This is called with @thread synch_cs held and it must release it*/
4681 self_suspend_internal (MonoInternalThread *thread)
4683 if (!mono_thread_info_new_interrupt_enabled ()) {
4684 thread->state &= ~ThreadState_SuspendRequested;
4685 thread->state |= ThreadState_Suspended;
4686 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4687 if (thread->suspend_event == NULL) {
4688 UNLOCK_THREAD (thread);
4691 if (thread->suspended_event)
4692 SetEvent (thread->suspended_event);
4694 UNLOCK_THREAD (thread);
4696 if (shutting_down) {
4697 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4702 WaitForSingleObject (thread->suspend_event, INFINITE);
4704 LOCK_THREAD (thread);
4706 CloseHandle (thread->suspend_event);
4707 thread->suspend_event = NULL;
4708 thread->state &= ~ThreadState_Suspended;
4710 /* The thread that requested the resume will have replaced this event
4711 * and will be waiting for it
4713 SetEvent (thread->resume_event);
4715 UNLOCK_THREAD (thread);
4719 transition_to_suspended (thread, NULL);
4720 mono_thread_info_self_suspend ();
4723 /*This is called with @thread synch_cs held and it must release it*/
4725 resume_thread_internal (MonoInternalThread *thread)
4727 if (!mono_thread_info_new_interrupt_enabled ()) {
4728 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4729 if (thread->resume_event == NULL) {
4730 UNLOCK_THREAD (thread);
4734 /* Awake the thread */
4735 SetEvent (thread->suspend_event);
4737 UNLOCK_THREAD (thread);
4739 /* Wait for the thread to awake */
4740 WaitForSingleObject (thread->resume_event, INFINITE);
4741 CloseHandle (thread->resume_event);
4742 thread->resume_event = NULL;
4746 UNLOCK_THREAD (thread);
4747 /* Awake the thread */
4748 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4750 LOCK_THREAD (thread);
4751 thread->state &= ~ThreadState_Suspended;
4752 UNLOCK_THREAD (thread);
4758 * mono_thread_is_foreign:
4759 * @thread: the thread to query
4761 * This function allows one to determine if a thread was created by the mono runtime and has
4762 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4764 * Returns: true if @thread was not created by the runtime.
4767 mono_thread_is_foreign (MonoThread *thread)
4769 MonoThreadInfo *info = thread->internal_thread->thread_info;
4770 return info->runtime_thread == FALSE;
4774 * mono_add_joinable_thread:
4776 * Add TID to the list of joinable threads.
4777 * LOCKING: Acquires the threads lock.
4780 mono_threads_add_joinable_thread (gpointer tid)
4784 * We cannot detach from threads because it causes problems like
4785 * 2fd16f60/r114307. So we collect them and join them when
4786 * we have time (in he finalizer thread).
4788 joinable_threads_lock ();
4789 if (!joinable_threads)
4790 joinable_threads = g_hash_table_new (NULL, NULL);
4791 g_hash_table_insert (joinable_threads, tid, tid);
4792 joinable_thread_count ++;
4793 joinable_threads_unlock ();
4795 mono_gc_finalize_notify ();
4800 * mono_threads_join_threads:
4802 * Join all joinable threads. This is called from the finalizer thread.
4803 * LOCKING: Acquires the threads lock.
4806 mono_threads_join_threads (void)
4809 GHashTableIter iter;
4816 if (!joinable_thread_count)
4820 joinable_threads_lock ();
4822 if (g_hash_table_size (joinable_threads)) {
4823 g_hash_table_iter_init (&iter, joinable_threads);
4824 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4825 thread = (pthread_t)tid;
4826 g_hash_table_remove (joinable_threads, key);
4827 joinable_thread_count --;
4830 joinable_threads_unlock ();
4832 if (thread != pthread_self ())
4833 /* This shouldn't block */
4834 pthread_join (thread, NULL);
4845 * Wait for thread TID to exit.
4846 * LOCKING: Acquires the threads lock.
4849 mono_thread_join (gpointer tid)
4853 gboolean found = FALSE;
4855 joinable_threads_lock ();
4856 if (!joinable_threads)
4857 joinable_threads = g_hash_table_new (NULL, NULL);
4858 if (g_hash_table_lookup (joinable_threads, tid)) {
4859 g_hash_table_remove (joinable_threads, tid);
4860 joinable_thread_count --;
4863 joinable_threads_unlock ();
4866 thread = (pthread_t)tid;
4867 pthread_join (thread, NULL);