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 mono_monitor_init_tls ();
594 /* Every thread references the appdomain which created it */
595 mono_thread_push_appdomain_ref (domain);
597 if (!mono_domain_set (domain, FALSE)) {
598 /* No point in raising an appdomain_unloaded exception here */
599 /* FIXME: Cleanup here */
600 mono_thread_pop_appdomain_ref ();
604 start_func = start_info->func;
605 start_arg = start_info->start_arg;
607 /* We have to do this here because mono_thread_new_init()
608 requires that root_domain_thread is set up. */
609 thread_adjust_static_data (internal);
610 init_root_domain_thread (internal, start_info->obj);
612 /* This MUST be called before any managed code can be
613 * executed, as it calls the callback function that (for the
614 * jit) sets the lmf marker.
616 mono_thread_new_init (tid, &tid, start_func);
617 internal->stack_ptr = &tid;
619 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
621 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
623 /* On 2.0 profile (and higher), set explicitly since state might have been
625 if (internal->apartment_state == ThreadApartmentState_Unknown)
626 internal->apartment_state = ThreadApartmentState_MTA;
628 mono_thread_init_apartment_state ();
630 if(internal->start_notify!=NULL) {
631 /* Let the thread that called Start() know we're
634 ReleaseSemaphore (internal->start_notify, 1, NULL);
637 mono_threads_lock ();
638 mono_g_hash_table_remove (thread_start_args, start_info->obj);
639 mono_threads_unlock ();
641 mono_thread_set_execution_context (start_info->obj->ec_to_set);
642 start_info->obj->ec_to_set = NULL;
645 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
649 * Call this after calling start_notify, since the profiler callback might want
650 * to lock the thread, and the lock is held by thread_start () which waits for
653 mono_profiler_thread_start (tid);
655 /* if the name was set before starting, we didn't invoke the profiler callback */
656 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
657 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
658 mono_profiler_thread_name (internal->tid, tname);
661 /* start_func is set only for unmanaged start functions */
663 start_func (start_arg);
666 g_assert (start_delegate != NULL);
667 args [0] = start_arg;
668 /* we may want to handle the exception here. See comment below on unhandled exceptions */
669 mono_runtime_delegate_invoke (start_delegate, args, NULL);
672 /* If the thread calls ExitThread at all, this remaining code
673 * will not be executed, but the main thread will eventually
674 * call thread_cleanup() on this thread's behalf.
677 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
679 /* Do any cleanup needed for apartment state. This
680 * cannot be done in thread_cleanup since thread_cleanup could be
681 * called for a thread other than the current thread.
682 * mono_thread_cleanup_apartment_state cleans up apartment
683 * for the current thead */
684 mono_thread_cleanup_apartment_state ();
686 thread_cleanup (internal);
690 /* Remove the reference to the thread object in the TLS data,
691 * so the thread object can be finalized. This won't be
692 * reached if the thread threw an uncaught exception, so those
693 * thread handles will stay referenced :-( (This is due to
694 * missing support for scanning thread-specific data in the
695 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
698 SET_CURRENT_OBJECT (NULL);
703 static guint32 WINAPI start_wrapper(void *data)
707 /* Avoid scanning the frames above this frame during a GC */
708 mono_gc_set_stack_end ((void*)&dummy);
710 return start_wrapper_internal (data);
716 * Common thread creation code.
717 * LOCKING: Acquires the threads lock.
720 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
721 gboolean throw_on_failure)
723 HANDLE thread_handle;
724 MonoNativeThreadId tid;
725 guint32 create_flags;
728 * Join joinable threads to prevent running out of threads since the finalizer
729 * thread might be blocked/backlogged.
731 mono_threads_join_threads ();
733 mono_threads_lock ();
736 mono_threads_unlock ();
740 * The thread start argument may be an object reference, and there is
741 * no ref to keep it alive when the new thread is started but not yet
742 * registered with the collector. So we store it in a GC tracked hash
745 if (thread_start_args == NULL) {
746 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
747 thread_start_args = mono_g_hash_table_new (NULL, NULL);
749 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
750 if (threads_starting_up == NULL) {
751 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
752 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
754 mono_g_hash_table_insert (threads_starting_up, thread, thread);
755 mono_threads_unlock ();
757 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
758 if (!internal->start_notify) {
759 mono_threads_lock ();
760 mono_g_hash_table_remove (threads_starting_up, thread);
761 mono_threads_unlock ();
762 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
768 stack_size = default_stacksize_for_thread (internal);
770 /* Create suspended, so we can do some housekeeping before the thread
773 create_flags = CREATE_SUSPENDED;
774 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
775 stack_size, create_flags, &tid);
776 if (thread_handle == NULL) {
777 /* The thread couldn't be created, so throw an exception */
778 mono_threads_lock ();
779 mono_g_hash_table_remove (threads_starting_up, thread);
780 mono_threads_unlock ();
782 if (throw_on_failure)
783 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
785 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
788 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
790 internal->handle = thread_handle;
791 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
793 internal->threadpool_thread = threadpool_thread;
794 if (threadpool_thread)
795 mono_thread_set_state (internal, ThreadState_Background);
797 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
799 /* Only store the handle when the thread is about to be
800 * launched, to avoid the main thread deadlocking while trying
801 * to clean up a thread that will never be signalled.
803 if (!handle_store (thread, FALSE))
806 mono_thread_info_resume (tid);
808 if (internal->start_notify) {
810 * Wait for the thread to set up its TLS data etc, so
811 * theres no potential race condition if someone tries
812 * to look up the data believing the thread has
815 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
817 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
818 CloseHandle (internal->start_notify);
819 internal->start_notify = NULL;
822 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
827 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
829 if (mono_thread_start_cb) {
830 mono_thread_start_cb (tid, stack_start, func);
834 void mono_threads_set_default_stacksize (guint32 stacksize)
836 default_stacksize = stacksize;
839 guint32 mono_threads_get_default_stacksize (void)
841 return default_stacksize;
845 * mono_thread_create_internal:
849 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
852 MonoInternalThread *internal;
853 StartInfo *start_info;
856 thread = create_thread_object (domain);
857 internal = create_internal_thread ();
858 MONO_OBJECT_SETREF (thread, internal_thread, internal);
860 start_info = g_new0 (StartInfo, 1);
861 start_info->func = func;
862 start_info->obj = thread;
863 start_info->start_arg = arg;
865 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
869 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
870 if (mono_check_corlib_version () == NULL)
871 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
877 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
879 mono_thread_create_internal (domain, func, arg, FALSE, 0);
883 mono_thread_attach (MonoDomain *domain)
885 return mono_thread_attach_full (domain, FALSE);
889 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
891 MonoThreadInfo *info;
892 MonoInternalThread *thread;
893 MonoThread *current_thread;
894 HANDLE thread_handle;
897 if ((thread = mono_thread_internal_current ())) {
898 if (domain != mono_domain_get ())
899 mono_domain_set (domain, TRUE);
900 /* Already attached */
901 return mono_thread_current ();
904 if (!mono_gc_register_thread (&domain)) {
905 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 ());
908 thread = create_internal_thread ();
910 thread_handle = mono_thread_info_open_handle ();
911 g_assert (thread_handle);
913 tid=GetCurrentThreadId ();
915 thread->handle=thread_handle;
917 #ifdef PLATFORM_ANDROID
918 thread->android_tid = (gpointer) gettid ();
920 thread->stack_ptr = &tid;
922 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
924 info = mono_thread_info_current ();
926 thread->thread_info = info;
927 thread->small_id = info->small_id;
929 current_thread = new_thread_with_internal (domain, thread);
931 if (!handle_store (current_thread, force_attach)) {
932 /* Mono is shutting down, so just wait for the end */
937 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
939 SET_CURRENT_OBJECT (thread);
940 mono_domain_set (domain, TRUE);
942 mono_monitor_init_tls ();
944 thread_adjust_static_data (thread);
946 init_root_domain_thread (thread, current_thread);
947 if (domain != mono_get_root_domain ())
948 set_current_thread_for_domain (domain, thread, current_thread);
951 if (mono_thread_attach_cb) {
955 mono_thread_info_get_stack_bounds (&staddr, &stsize);
958 mono_thread_attach_cb (tid, &tid);
960 mono_thread_attach_cb (tid, staddr + stsize);
963 // FIXME: Need a separate callback
964 mono_profiler_thread_start (tid);
966 return current_thread;
970 mono_thread_detach_internal (MonoInternalThread *thread)
972 g_return_if_fail (thread != NULL);
974 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
976 thread_cleanup (thread);
978 SET_CURRENT_OBJECT (NULL);
979 mono_domain_unset ();
981 /* Don't need to CloseHandle this thread, even though we took a
982 * reference in mono_thread_attach (), because the GC will do it
983 * when the Thread object is finalised.
988 mono_thread_detach (MonoThread *thread)
991 mono_thread_detach_internal (thread->internal_thread);
995 * mono_thread_detach_if_exiting:
997 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
998 * This should be used at the end of embedding code which calls into managed code, and which
999 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1002 mono_thread_detach_if_exiting (void)
1004 if (mono_thread_info_is_exiting ()) {
1005 MonoInternalThread *thread;
1007 thread = mono_thread_internal_current ();
1009 mono_thread_detach_internal (thread);
1010 mono_thread_info_detach ();
1018 MonoInternalThread *thread = mono_thread_internal_current ();
1020 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1022 thread_cleanup (thread);
1023 SET_CURRENT_OBJECT (NULL);
1024 mono_domain_unset ();
1026 /* we could add a callback here for embedders to use. */
1027 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1028 exit (mono_environment_exitcode_get ());
1029 mono_thread_info_exit ();
1033 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1035 MonoInternalThread *internal = create_internal_thread ();
1037 internal->state = ThreadState_Unstarted;
1039 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1043 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this,
1046 StartInfo *start_info;
1047 MonoInternalThread *internal;
1050 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1052 if (!this->internal_thread)
1053 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1054 internal = this->internal_thread;
1056 LOCK_THREAD (internal);
1058 if ((internal->state & ThreadState_Unstarted) == 0) {
1059 UNLOCK_THREAD (internal);
1060 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1064 if ((internal->state & ThreadState_Aborted) != 0) {
1065 UNLOCK_THREAD (internal);
1068 /* This is freed in start_wrapper */
1069 start_info = g_new0 (StartInfo, 1);
1070 start_info->func = NULL;
1071 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1072 start_info->delegate = start;
1073 start_info->obj = this;
1074 g_assert (this->obj.vtable->domain == mono_domain_get ());
1076 res = create_thread (this, internal, start_info, FALSE, 0, FALSE);
1078 UNLOCK_THREAD (internal);
1082 internal->state &= ~ThreadState_Unstarted;
1084 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1086 UNLOCK_THREAD (internal);
1087 return internal->handle;
1091 * This is called from the finalizer of the internal thread object.
1094 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1096 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1099 * Since threads keep a reference to their thread object while running, by the time this function is called,
1100 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1101 * when thread_cleanup () can be called after this.
1104 CloseHandle (thread);
1106 if (this->synch_cs) {
1107 mono_mutex_t *synch_cs = this->synch_cs;
1108 this->synch_cs = NULL;
1109 mono_mutex_destroy (synch_cs);
1114 void *name = this->name;
1120 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1123 MonoInternalThread *thread = mono_thread_internal_current ();
1125 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1127 mono_thread_current_check_pending_interrupt ();
1130 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1132 res = SleepEx(ms,TRUE);
1134 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1136 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1137 MonoException* exc = mono_thread_execute_interruption (thread);
1139 mono_raise_exception (exc);
1151 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1156 ves_icall_System_Threading_Thread_GetDomainID (void)
1158 return mono_domain_get()->domain_id;
1162 ves_icall_System_Threading_Thread_Yield (void)
1164 return mono_thread_info_yield ();
1168 * mono_thread_get_name:
1170 * Return the name of the thread. NAME_LEN is set to the length of the name.
1171 * Return NULL if the thread has no name. The returned memory is owned by the
1175 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1179 LOCK_THREAD (this_obj);
1181 if (!this_obj->name) {
1185 *name_len = this_obj->name_len;
1186 res = g_new (gunichar2, this_obj->name_len);
1187 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1190 UNLOCK_THREAD (this_obj);
1196 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1200 LOCK_THREAD (this_obj);
1202 if (!this_obj->name)
1205 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1207 UNLOCK_THREAD (this_obj);
1213 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1215 LOCK_THREAD (this_obj);
1217 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1218 UNLOCK_THREAD (this_obj);
1220 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1223 if (this_obj->name) {
1224 g_free (this_obj->name);
1225 this_obj->name_len = 0;
1228 this_obj->name = g_new (gunichar2, mono_string_length (name));
1229 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1230 this_obj->name_len = mono_string_length (name);
1233 this_obj->name = NULL;
1236 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1238 UNLOCK_THREAD (this_obj);
1240 if (this_obj->name && this_obj->tid) {
1241 char *tname = mono_string_to_utf8 (name);
1242 mono_profiler_thread_name (this_obj->tid, tname);
1243 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1249 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1251 mono_thread_set_name_internal (this_obj, name, TRUE);
1254 /* If the array is already in the requested domain, we just return it,
1255 otherwise we return a copy in that domain. */
1257 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1264 if (mono_object_domain (arr) == domain)
1267 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1268 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1273 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1275 return byte_array_to_domain (arr, mono_get_root_domain ());
1279 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1281 return byte_array_to_domain (arr, mono_domain_get ());
1285 mono_thread_current (void)
1287 MonoDomain *domain = mono_domain_get ();
1288 MonoInternalThread *internal = mono_thread_internal_current ();
1289 MonoThread **current_thread_ptr;
1291 g_assert (internal);
1292 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1294 if (!*current_thread_ptr) {
1295 g_assert (domain != mono_get_root_domain ());
1296 *current_thread_ptr = new_thread_with_internal (domain, internal);
1298 return *current_thread_ptr;
1302 mono_thread_internal_current (void)
1304 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1305 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1309 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1310 int ms, HANDLE thread)
1312 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1315 mono_thread_current_check_pending_interrupt ();
1319 if ((this->state & ThreadState_Unstarted) != 0) {
1320 UNLOCK_THREAD (this);
1322 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1326 UNLOCK_THREAD (this);
1331 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1333 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1335 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1337 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1339 if(ret==WAIT_OBJECT_0) {
1340 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1345 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1351 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1359 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1362 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1364 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1366 if (ret != WAIT_IO_COMPLETION)
1369 exc = mono_thread_execute_interruption (thread);
1371 mono_raise_exception (exc);
1376 /* Re-calculate ms according to the time passed */
1377 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1378 if (diff_ms >= ms) {
1382 wait = ms - diff_ms;
1388 /* FIXME: exitContext isnt documented */
1389 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1395 MonoObject *waitHandle;
1396 MonoInternalThread *thread = mono_thread_internal_current ();
1398 /* Do this WaitSleepJoin check before creating objects */
1399 mono_thread_current_check_pending_interrupt ();
1401 /* We fail in managed if the array has more than 64 elements */
1402 numhandles = (guint32)mono_array_length(mono_handles);
1403 handles = g_new0(HANDLE, numhandles);
1405 for(i = 0; i < numhandles; i++) {
1406 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1407 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1414 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1416 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1418 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1422 if(ret==WAIT_FAILED) {
1423 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1425 } else if(ret==WAIT_TIMEOUT) {
1426 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1433 /* FIXME: exitContext isnt documented */
1434 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1436 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1437 uintptr_t numhandles;
1440 MonoObject *waitHandle;
1441 MonoInternalThread *thread = mono_thread_internal_current ();
1443 /* Do this WaitSleepJoin check before creating objects */
1444 mono_thread_current_check_pending_interrupt ();
1446 numhandles = mono_array_length(mono_handles);
1447 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1450 for(i = 0; i < numhandles; i++) {
1451 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1452 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1459 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1461 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1463 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1465 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1468 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1470 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1471 return ret - WAIT_OBJECT_0;
1473 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1474 return ret - WAIT_ABANDONED_0;
1481 /* FIXME: exitContext isnt documented */
1482 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1485 MonoInternalThread *thread = mono_thread_internal_current ();
1487 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1493 mono_thread_current_check_pending_interrupt ();
1495 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1497 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1499 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1501 if(ret==WAIT_FAILED) {
1502 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1504 } else if(ret==WAIT_TIMEOUT) {
1505 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1513 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1516 MonoInternalThread *thread = mono_thread_internal_current ();
1521 mono_thread_current_check_pending_interrupt ();
1523 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1525 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1527 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1529 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1532 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1539 mutex = CreateMutex (NULL, owned, NULL);
1541 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1543 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1551 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1552 return(ReleaseMutex (handle));
1555 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1561 *error = ERROR_SUCCESS;
1563 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1565 *error = GetLastError ();
1572 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1579 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1581 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1582 mono_string_chars (name));
1584 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1592 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1596 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1601 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1605 *error = ERROR_SUCCESS;
1607 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1609 *error = GetLastError ();
1615 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1622 event = CreateEvent (NULL, manual, initial, NULL);
1624 event = CreateEvent (NULL, manual, initial,
1625 mono_string_chars (name));
1627 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1635 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1636 return (SetEvent(handle));
1639 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1640 return (ResetEvent(handle));
1644 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1645 CloseHandle (handle);
1648 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1654 *error = ERROR_SUCCESS;
1656 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1658 *error = GetLastError ();
1664 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1666 return InterlockedIncrement (location);
1669 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1671 #if SIZEOF_VOID_P == 4
1672 if (G_UNLIKELY ((size_t)location & 0x7)) {
1674 mono_interlocked_lock ();
1677 mono_interlocked_unlock ();
1681 return InterlockedIncrement64 (location);
1684 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1686 return InterlockedDecrement(location);
1689 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1691 #if SIZEOF_VOID_P == 4
1692 if (G_UNLIKELY ((size_t)location & 0x7)) {
1694 mono_interlocked_lock ();
1697 mono_interlocked_unlock ();
1701 return InterlockedDecrement64 (location);
1704 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1706 return InterlockedExchange(location, value);
1709 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1712 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1713 mono_gc_wbarrier_generic_nostore (location);
1717 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1719 return InterlockedExchangePointer(location, value);
1722 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1724 IntFloatUnion val, ret;
1727 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1733 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1735 #if SIZEOF_VOID_P == 4
1736 if (G_UNLIKELY ((size_t)location & 0x7)) {
1738 mono_interlocked_lock ();
1741 mono_interlocked_unlock ();
1745 return InterlockedExchange64 (location, value);
1749 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1751 LongDoubleUnion val, ret;
1754 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1759 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1761 return InterlockedCompareExchange(location, value, comparand);
1764 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1767 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1768 mono_gc_wbarrier_generic_nostore (location);
1772 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1774 return InterlockedCompareExchangePointer(location, value, comparand);
1777 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1779 IntFloatUnion val, ret, cmp;
1782 cmp.fval = comparand;
1783 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1789 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1791 #if SIZEOF_VOID_P == 8
1792 LongDoubleUnion val, comp, ret;
1795 comp.fval = comparand;
1796 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1802 mono_interlocked_lock ();
1804 if (old == comparand)
1806 mono_interlocked_unlock ();
1813 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1815 #if SIZEOF_VOID_P == 4
1816 if (G_UNLIKELY ((size_t)location & 0x7)) {
1818 mono_interlocked_lock ();
1820 if (old == comparand)
1822 mono_interlocked_unlock ();
1826 return InterlockedCompareExchange64 (location, value, comparand);
1830 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1833 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1834 mono_gc_wbarrier_generic_nostore (location);
1839 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1842 res = InterlockedExchangePointer ((gpointer *)location, value);
1843 mono_gc_wbarrier_generic_nostore (location);
1848 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1850 return InterlockedAdd (location, value);
1854 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1856 #if SIZEOF_VOID_P == 4
1857 if (G_UNLIKELY ((size_t)location & 0x7)) {
1859 mono_interlocked_lock ();
1862 mono_interlocked_unlock ();
1866 return InterlockedAdd64 (location, value);
1870 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1872 #if SIZEOF_VOID_P == 4
1873 if (G_UNLIKELY ((size_t)location & 0x7)) {
1875 mono_interlocked_lock ();
1877 mono_interlocked_unlock ();
1881 return InterlockedRead64 (location);
1885 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1887 mono_memory_barrier ();
1891 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1893 mono_thread_clr_state (this, state);
1895 if (state & ThreadState_Background) {
1896 /* If the thread changes the background mode, the main thread has to
1897 * be notified, since it has to rebuild the list of threads to
1900 SetEvent (background_change_event);
1905 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1907 mono_thread_set_state (this, state);
1909 if (state & ThreadState_Background) {
1910 /* If the thread changes the background mode, the main thread has to
1911 * be notified, since it has to rebuild the list of threads to
1914 SetEvent (background_change_event);
1919 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1925 state = this->state;
1927 UNLOCK_THREAD (this);
1932 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1934 MonoInternalThread *current;
1939 current = mono_thread_internal_current ();
1941 this->thread_interrupt_requested = TRUE;
1942 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1944 UNLOCK_THREAD (this);
1947 abort_thread_internal (this, TRUE, FALSE);
1951 void mono_thread_current_check_pending_interrupt ()
1953 MonoInternalThread *thread = mono_thread_internal_current ();
1954 gboolean throw = FALSE;
1956 LOCK_THREAD (thread);
1958 if (thread->thread_interrupt_requested) {
1960 thread->thread_interrupt_requested = FALSE;
1963 UNLOCK_THREAD (thread);
1966 mono_raise_exception (mono_get_exception_thread_interrupted ());
1971 mono_thread_get_abort_signal (void)
1975 #elif defined(PLATFORM_ANDROID)
1977 #elif !defined (SIGRTMIN)
1982 #endif /* SIGUSR1 */
1984 static int abort_signum = -1;
1986 if (abort_signum != -1)
1987 return abort_signum;
1988 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1989 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1990 struct sigaction sinfo;
1991 sigaction (i, NULL, &sinfo);
1992 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
1997 /* fallback to the old way */
1999 #endif /* HOST_WIN32 */
2003 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2005 MonoException* exc = mono_thread_request_interruption (FALSE);
2006 if (exc) mono_raise_exception (exc);
2008 #endif /* HOST_WIN32 */
2011 * signal_thread_state_change
2013 * Tells the thread that his state has changed and it has to enter the new
2014 * state as soon as possible.
2016 static void signal_thread_state_change (MonoInternalThread *thread)
2019 gpointer wait_handle;
2022 if (thread == mono_thread_internal_current ()) {
2023 /* Do it synchronously */
2024 MonoException *exc = mono_thread_request_interruption (FALSE);
2026 mono_raise_exception (exc);
2030 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, (ULONG_PTR)NULL);
2033 * This will cause waits to be broken.
2034 * It will also prevent the thread from entering a wait, so if the thread returns
2035 * from the wait before it receives the abort signal, it will just spin in the wait
2036 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2039 wait_handle = mono_thread_info_prepare_interrupt (thread->handle);
2041 /* fixme: store the state somewhere */
2042 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2044 mono_thread_info_finish_interrupt (wait_handle);
2045 #endif /* HOST_WIN32 */
2049 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2051 LOCK_THREAD (thread);
2053 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2054 (thread->state & ThreadState_StopRequested) != 0 ||
2055 (thread->state & ThreadState_Stopped) != 0)
2057 UNLOCK_THREAD (thread);
2061 if ((thread->state & ThreadState_Unstarted) != 0) {
2062 thread->state |= ThreadState_Aborted;
2063 UNLOCK_THREAD (thread);
2067 thread->state |= ThreadState_AbortRequested;
2068 if (thread->abort_state_handle)
2069 mono_gchandle_free (thread->abort_state_handle);
2071 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2072 g_assert (thread->abort_state_handle);
2074 thread->abort_state_handle = 0;
2076 thread->abort_exc = NULL;
2079 * abort_exc is set in mono_thread_execute_interruption(),
2080 * triggered by the call to signal_thread_state_change(),
2081 * below. There's a point between where we have
2082 * abort_state_handle set, but abort_exc NULL, but that's not
2086 UNLOCK_THREAD (thread);
2088 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2090 /* During shutdown, we can't wait for other threads */
2092 /* Make sure the thread is awake */
2093 mono_thread_resume (thread);
2095 abort_thread_internal (thread, TRUE, TRUE);
2099 ves_icall_System_Threading_Thread_ResetAbort (void)
2101 MonoInternalThread *thread = mono_thread_internal_current ();
2102 gboolean was_aborting;
2104 LOCK_THREAD (thread);
2105 was_aborting = thread->state & ThreadState_AbortRequested;
2106 thread->state &= ~ThreadState_AbortRequested;
2107 UNLOCK_THREAD (thread);
2109 if (!was_aborting) {
2110 const char *msg = "Unable to reset abort because no abort was requested";
2111 mono_raise_exception (mono_get_exception_thread_state (msg));
2113 thread->abort_exc = NULL;
2114 if (thread->abort_state_handle) {
2115 mono_gchandle_free (thread->abort_state_handle);
2116 /* This is actually not necessary - the handle
2117 only counts if the exception is set */
2118 thread->abort_state_handle = 0;
2123 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2125 LOCK_THREAD (thread);
2127 thread->state &= ~ThreadState_AbortRequested;
2129 if (thread->abort_exc) {
2130 thread->abort_exc = NULL;
2131 if (thread->abort_state_handle) {
2132 mono_gchandle_free (thread->abort_state_handle);
2133 /* This is actually not necessary - the handle
2134 only counts if the exception is set */
2135 thread->abort_state_handle = 0;
2139 UNLOCK_THREAD (thread);
2143 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2145 MonoInternalThread *thread = this->internal_thread;
2146 MonoObject *state, *deserialized = NULL, *exc;
2149 if (!thread->abort_state_handle)
2152 state = mono_gchandle_get_target (thread->abort_state_handle);
2155 domain = mono_domain_get ();
2156 if (mono_object_domain (state) == domain)
2159 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2161 if (!deserialized) {
2162 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2164 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2165 mono_raise_exception (invalid_op_exc);
2168 return deserialized;
2172 mono_thread_suspend (MonoInternalThread *thread)
2174 LOCK_THREAD (thread);
2176 if ((thread->state & ThreadState_Unstarted) != 0 ||
2177 (thread->state & ThreadState_Aborted) != 0 ||
2178 (thread->state & ThreadState_Stopped) != 0)
2180 UNLOCK_THREAD (thread);
2184 if ((thread->state & ThreadState_Suspended) != 0 ||
2185 (thread->state & ThreadState_SuspendRequested) != 0 ||
2186 (thread->state & ThreadState_StopRequested) != 0)
2188 UNLOCK_THREAD (thread);
2192 thread->state |= ThreadState_SuspendRequested;
2194 UNLOCK_THREAD (thread);
2196 suspend_thread_internal (thread, FALSE);
2201 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2203 if (!mono_thread_suspend (thread))
2204 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2208 mono_thread_resume (MonoInternalThread *thread)
2210 LOCK_THREAD (thread);
2212 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2213 thread->state &= ~ThreadState_SuspendRequested;
2214 UNLOCK_THREAD (thread);
2218 if ((thread->state & ThreadState_Suspended) == 0 ||
2219 (thread->state & ThreadState_Unstarted) != 0 ||
2220 (thread->state & ThreadState_Aborted) != 0 ||
2221 (thread->state & ThreadState_Stopped) != 0)
2223 UNLOCK_THREAD (thread);
2227 return resume_thread_internal (thread);
2231 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2233 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2234 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2238 mono_threads_is_critical_method (MonoMethod *method)
2240 switch (method->wrapper_type) {
2241 case MONO_WRAPPER_RUNTIME_INVOKE:
2242 case MONO_WRAPPER_XDOMAIN_INVOKE:
2243 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2250 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2255 if (mono_threads_is_critical_method (m)) {
2256 *((gboolean*)data) = TRUE;
2263 is_running_protected_wrapper (void)
2265 gboolean found = FALSE;
2266 mono_stack_walk (find_wrapper, &found);
2270 void mono_thread_internal_stop (MonoInternalThread *thread)
2272 LOCK_THREAD (thread);
2274 if ((thread->state & ThreadState_StopRequested) != 0 ||
2275 (thread->state & ThreadState_Stopped) != 0)
2277 UNLOCK_THREAD (thread);
2281 /* Make sure the thread is awake */
2282 mono_thread_resume (thread);
2284 thread->state |= ThreadState_StopRequested;
2285 thread->state &= ~ThreadState_AbortRequested;
2287 UNLOCK_THREAD (thread);
2289 abort_thread_internal (thread, TRUE, TRUE);
2292 void mono_thread_stop (MonoThread *thread)
2294 mono_thread_internal_stop (thread->internal_thread);
2298 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2301 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2306 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2309 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2314 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2317 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2322 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2325 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2330 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2333 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2334 return (void *) tmp;
2338 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2340 volatile MonoObject *tmp;
2341 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2342 return (MonoObject *) tmp;
2346 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2349 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2354 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2357 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2362 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2364 return InterlockedRead8 (ptr);
2368 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2370 return InterlockedRead16 (ptr);
2374 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2376 return InterlockedRead (ptr);
2380 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2382 #if SIZEOF_VOID_P == 4
2383 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2385 mono_interlocked_lock ();
2386 val = *(gint64*)ptr;
2387 mono_interlocked_unlock ();
2391 return InterlockedRead64 (ptr);
2395 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2397 return InterlockedReadPointer (ptr);
2401 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2405 #if SIZEOF_VOID_P == 4
2406 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2408 mono_interlocked_lock ();
2409 val = *(double*)ptr;
2410 mono_interlocked_unlock ();
2415 u.ival = InterlockedRead64 (ptr);
2421 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2425 u.ival = InterlockedRead (ptr);
2431 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2433 return InterlockedReadPointer (ptr);
2437 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2439 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2443 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2445 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2449 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2451 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2455 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2457 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2461 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2463 mono_atomic_store_release ((volatile void **) ptr, value);
2467 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2469 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2473 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2475 mono_atomic_store_release ((volatile double *) ptr, value);
2479 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2481 mono_atomic_store_release ((volatile float *) ptr, value);
2485 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2487 InterlockedWrite8 (ptr, value);
2491 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2493 InterlockedWrite16 (ptr, value);
2497 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2499 InterlockedWrite (ptr, value);
2503 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2505 #if SIZEOF_VOID_P == 4
2506 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2507 mono_interlocked_lock ();
2508 *(gint64*)ptr = value;
2509 mono_interlocked_unlock ();
2514 InterlockedWrite64 (ptr, value);
2518 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2520 InterlockedWritePointer (ptr, value);
2524 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2528 #if SIZEOF_VOID_P == 4
2529 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2530 mono_interlocked_lock ();
2531 *(double*)ptr = value;
2532 mono_interlocked_unlock ();
2539 InterlockedWrite64 (ptr, u.ival);
2543 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2549 InterlockedWrite (ptr, u.ival);
2553 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2555 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2559 mono_thread_init_tls (void)
2561 MONO_FAST_TLS_INIT (tls_current_object);
2562 mono_native_tls_alloc (¤t_object_key, NULL);
2565 void mono_thread_init (MonoThreadStartCB start_cb,
2566 MonoThreadAttachCB attach_cb)
2568 mono_mutex_init_recursive(&threads_mutex);
2569 mono_mutex_init_recursive(&interlocked_mutex);
2570 mono_mutex_init_recursive(&contexts_mutex);
2571 mono_mutex_init_recursive(&joinable_threads_mutex);
2573 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2574 g_assert(background_change_event != NULL);
2576 mono_init_static_data_info (&thread_static_info);
2577 mono_init_static_data_info (&context_static_info);
2579 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2581 mono_thread_start_cb = start_cb;
2582 mono_thread_attach_cb = attach_cb;
2584 /* Get a pseudo handle to the current process. This is just a
2585 * kludge so that wapi can build a process handle if needed.
2586 * As a pseudo handle is returned, we don't need to clean
2589 GetCurrentProcess ();
2592 void mono_thread_cleanup (void)
2594 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2595 MonoThreadInfo *info;
2597 /* The main thread must abandon any held mutexes (particularly
2598 * important for named mutexes as they are shared across
2599 * processes, see bug 74680.) This will happen when the
2600 * thread exits, but if it's not running in a subthread it
2601 * won't exit in time.
2603 info = mono_thread_info_current ();
2604 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2608 /* This stuff needs more testing, it seems one of these
2609 * critical sections can be locked when mono_thread_cleanup is
2612 mono_mutex_destroy (&threads_mutex);
2613 mono_mutex_destroy (&interlocked_mutex);
2614 mono_mutex_destroy (&contexts_mutex);
2615 mono_mutex_destroy (&delayed_free_table_mutex);
2616 mono_mutex_destroy (&small_id_mutex);
2617 CloseHandle (background_change_event);
2620 mono_native_tls_free (current_object_key);
2624 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2626 mono_thread_cleanup_fn = func;
2630 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2632 thread->internal_thread->manage_callback = func;
2635 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2637 mono_thread_notify_pending_exc_fn = func;
2641 static void print_tids (gpointer key, gpointer value, gpointer user)
2643 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2644 * sizeof(uint) and a cast to uint would overflow
2646 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2647 * print this as a pointer.
2649 g_message ("Waiting for: %p", key);
2654 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2655 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2659 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2663 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2665 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2667 if(ret==WAIT_FAILED) {
2668 /* See the comment in build_wait_tids() */
2669 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2673 for(i=0; i<wait->num; i++)
2674 CloseHandle (wait->handles[i]);
2676 if (ret == WAIT_TIMEOUT)
2679 for(i=0; i<wait->num; i++) {
2680 gsize tid = wait->threads[i]->tid;
2683 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2684 * it can still run io-layer etc. code. So wait for it to really exit.
2685 * FIXME: This won't join threads which are not in the joinable_hash yet.
2687 mono_thread_join ((gpointer)tid);
2689 mono_threads_lock ();
2690 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2691 /* This thread must have been killed, because
2692 * it hasn't cleaned itself up. (It's just
2693 * possible that the thread exited before the
2694 * parent thread had a chance to store the
2695 * handle, and now there is another pointer to
2696 * the already-exited thread stored. In this
2697 * case, we'll just get two
2698 * mono_profiler_thread_end() calls for the
2702 mono_threads_unlock ();
2703 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2704 thread_cleanup (wait->threads[i]);
2706 mono_threads_unlock ();
2711 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2713 guint32 i, ret, count;
2715 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2717 /* Add the thread state change event, so it wakes up if a thread changes
2718 * to background mode.
2721 if (count < MAXIMUM_WAIT_OBJECTS) {
2722 wait->handles [count] = background_change_event;
2726 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2728 if(ret==WAIT_FAILED) {
2729 /* See the comment in build_wait_tids() */
2730 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2734 for(i=0; i<wait->num; i++)
2735 CloseHandle (wait->handles[i]);
2737 if (ret == WAIT_TIMEOUT)
2740 if (ret < wait->num) {
2741 gsize tid = wait->threads[ret]->tid;
2742 mono_threads_lock ();
2743 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2744 /* See comment in wait_for_tids about thread cleanup */
2745 mono_threads_unlock ();
2746 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2747 thread_cleanup (wait->threads [ret]);
2749 mono_threads_unlock ();
2753 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2755 struct wait_data *wait=(struct wait_data *)user;
2757 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2759 MonoInternalThread *thread=(MonoInternalThread *)value;
2761 /* Ignore background threads, we abort them later */
2762 /* Do not lock here since it is not needed and the caller holds threads_lock */
2763 if (thread->state & ThreadState_Background) {
2764 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2765 return; /* just leave, ignore */
2768 if (mono_gc_is_finalizer_internal_thread (thread)) {
2769 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2773 if (thread == mono_thread_internal_current ()) {
2774 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2778 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2779 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2783 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2784 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2788 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2789 if (handle == NULL) {
2790 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2794 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2795 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2796 wait->handles[wait->num]=handle;
2797 wait->threads[wait->num]=thread;
2800 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2802 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2807 /* Just ignore the rest, we can't do anything with
2814 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2816 struct wait_data *wait=(struct wait_data *)user;
2817 gsize self = GetCurrentThreadId ();
2818 MonoInternalThread *thread = value;
2821 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2824 /* The finalizer thread is not a background thread */
2825 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2826 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2828 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2832 /* printf ("A: %d\n", wait->num); */
2833 wait->handles[wait->num]=thread->handle;
2834 wait->threads[wait->num]=thread;
2837 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2838 mono_thread_internal_stop (thread);
2842 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2846 * mono_threads_set_shutting_down:
2848 * Is called by a thread that wants to shut down Mono. If the runtime is already
2849 * shutting down, the calling thread is suspended/stopped, and this function never
2853 mono_threads_set_shutting_down (void)
2855 MonoInternalThread *current_thread = mono_thread_internal_current ();
2857 mono_threads_lock ();
2859 if (shutting_down) {
2860 mono_threads_unlock ();
2862 /* Make sure we're properly suspended/stopped */
2864 LOCK_THREAD (current_thread);
2866 if ((current_thread->state & ThreadState_SuspendRequested) ||
2867 (current_thread->state & ThreadState_AbortRequested) ||
2868 (current_thread->state & ThreadState_StopRequested)) {
2869 UNLOCK_THREAD (current_thread);
2870 mono_thread_execute_interruption (current_thread);
2872 current_thread->state |= ThreadState_Stopped;
2873 UNLOCK_THREAD (current_thread);
2876 /*since we're killing the thread, unset the current domain.*/
2877 mono_domain_unset ();
2879 /* Wake up other threads potentially waiting for us */
2880 mono_thread_info_exit ();
2882 shutting_down = TRUE;
2884 /* Not really a background state change, but this will
2885 * interrupt the main thread if it is waiting for all
2886 * the other threads.
2888 SetEvent (background_change_event);
2890 mono_threads_unlock ();
2894 void mono_thread_manage (void)
2896 struct wait_data wait_data;
2897 struct wait_data *wait = &wait_data;
2899 memset (wait, 0, sizeof (struct wait_data));
2900 /* join each thread that's still running */
2901 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2903 mono_threads_lock ();
2905 THREAD_DEBUG (g_message("%s: No threads", __func__));
2906 mono_threads_unlock ();
2909 mono_threads_unlock ();
2912 mono_threads_lock ();
2913 if (shutting_down) {
2914 /* somebody else is shutting down */
2915 mono_threads_unlock ();
2918 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2919 mono_g_hash_table_foreach (threads, print_tids, NULL));
2921 ResetEvent (background_change_event);
2923 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2924 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2925 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2926 mono_threads_unlock ();
2928 /* Something to wait for */
2929 wait_for_tids_or_state_change (wait, INFINITE);
2931 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2932 } while(wait->num>0);
2934 /* Mono is shutting down, so just wait for the end */
2935 if (!mono_runtime_try_shutdown ()) {
2936 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2937 mono_thread_suspend (mono_thread_internal_current ());
2938 mono_thread_execute_interruption (mono_thread_internal_current ());
2942 * Remove everything but the finalizer thread and self.
2943 * Also abort all the background threads
2946 mono_threads_lock ();
2949 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2950 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2951 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2953 mono_threads_unlock ();
2955 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2957 /* Something to wait for */
2958 wait_for_tids (wait, INFINITE);
2960 } while (wait->num > 0);
2963 * give the subthreads a chance to really quit (this is mainly needed
2964 * to get correct user and system times from getrusage/wait/time(1)).
2965 * This could be removed if we avoid pthread_detach() and use pthread_join().
2967 mono_thread_info_yield ();
2970 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2972 MonoInternalThread *thread=(MonoInternalThread *)value;
2974 if(thread->tid != (gsize)user) {
2975 /*TerminateThread (thread->handle, -1);*/
2979 void mono_thread_abort_all_other_threads (void)
2981 gsize self = GetCurrentThreadId ();
2983 mono_threads_lock ();
2984 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2985 mono_g_hash_table_size (threads));
2986 mono_g_hash_table_foreach (threads, print_tids, NULL));
2988 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2990 mono_threads_unlock ();
2994 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2996 MonoInternalThread *thread = (MonoInternalThread*)value;
2997 struct wait_data *wait = (struct wait_data*)user_data;
3001 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3003 * This needs no locking.
3005 if ((thread->state & ThreadState_Suspended) != 0 ||
3006 (thread->state & ThreadState_Stopped) != 0)
3009 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3010 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3014 wait->handles [wait->num] = handle;
3015 wait->threads [wait->num] = thread;
3021 * mono_thread_suspend_all_other_threads:
3023 * Suspend all managed threads except the finalizer thread and this thread. It is
3024 * not possible to resume them later.
3026 void mono_thread_suspend_all_other_threads (void)
3028 struct wait_data wait_data;
3029 struct wait_data *wait = &wait_data;
3031 gsize self = GetCurrentThreadId ();
3033 guint32 eventidx = 0;
3034 gboolean starting, finished;
3036 memset (wait, 0, sizeof (struct wait_data));
3038 * The other threads could be in an arbitrary state at this point, i.e.
3039 * they could be starting up, shutting down etc. This means that there could be
3040 * threads which are not even in the threads hash table yet.
3044 * First we set a barrier which will be checked by all threads before they
3045 * are added to the threads hash table, and they will exit if the flag is set.
3046 * This ensures that no threads could be added to the hash later.
3047 * We will use shutting_down as the barrier for now.
3049 g_assert (shutting_down);
3052 * We make multiple calls to WaitForMultipleObjects since:
3053 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3054 * - some threads could exit without becoming suspended
3059 * Make a copy of the hashtable since we can't do anything with
3060 * threads while threads_mutex is held.
3063 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3064 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3065 mono_threads_lock ();
3066 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3067 mono_threads_unlock ();
3069 events = g_new0 (gpointer, wait->num);
3071 /* Get the suspended events that we'll be waiting for */
3072 for (i = 0; i < wait->num; ++i) {
3073 MonoInternalThread *thread = wait->threads [i];
3074 gboolean signal_suspend = FALSE;
3076 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3077 //CloseHandle (wait->handles [i]);
3078 wait->threads [i] = NULL; /* ignore this thread in next loop */
3082 LOCK_THREAD (thread);
3084 if (thread->suspended_event == NULL) {
3085 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3086 if (thread->suspended_event == NULL) {
3087 /* Forget this one and go on to the next */
3088 UNLOCK_THREAD (thread);
3093 if ((thread->state & ThreadState_Suspended) != 0 ||
3094 (thread->state & ThreadState_StopRequested) != 0 ||
3095 (thread->state & ThreadState_Stopped) != 0) {
3096 UNLOCK_THREAD (thread);
3097 CloseHandle (wait->handles [i]);
3098 wait->threads [i] = NULL; /* ignore this thread in next loop */
3102 if ((thread->state & ThreadState_SuspendRequested) == 0)
3103 signal_suspend = TRUE;
3105 events [eventidx++] = thread->suspended_event;
3107 /* Convert abort requests into suspend requests */
3108 if ((thread->state & ThreadState_AbortRequested) != 0)
3109 thread->state &= ~ThreadState_AbortRequested;
3111 thread->state |= ThreadState_SuspendRequested;
3113 UNLOCK_THREAD (thread);
3115 /* Signal the thread to suspend */
3116 if (mono_thread_info_new_interrupt_enabled ())
3117 suspend_thread_internal (thread, TRUE);
3118 else if (signal_suspend)
3119 signal_thread_state_change (thread);
3122 /*Only wait on the suspend event if we are using the old path */
3123 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3124 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3125 for (i = 0; i < wait->num; ++i) {
3126 MonoInternalThread *thread = wait->threads [i];
3131 LOCK_THREAD (thread);
3132 if ((thread->state & ThreadState_Suspended) != 0) {
3133 CloseHandle (thread->suspended_event);
3134 thread->suspended_event = NULL;
3136 UNLOCK_THREAD (thread);
3140 if (eventidx <= 0) {
3142 * If there are threads which are starting up, we wait until they
3143 * are suspended when they try to register in the threads hash.
3144 * This is guaranteed to finish, since the threads which can create new
3145 * threads get suspended after a while.
3146 * FIXME: The finalizer thread can still create new threads.
3148 mono_threads_lock ();
3149 if (threads_starting_up)
3150 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3153 mono_threads_unlock ();
3165 collect_threads (gpointer key, gpointer value, gpointer user_data)
3167 MonoInternalThread *thread = (MonoInternalThread*)value;
3168 struct wait_data *wait = (struct wait_data*)user_data;
3171 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3172 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3176 wait->handles [wait->num] = handle;
3177 wait->threads [wait->num] = thread;
3182 static gboolean thread_dump_requested;
3184 static G_GNUC_UNUSED gboolean
3185 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3187 GString *p = (GString*)data;
3188 MonoMethod *method = NULL;
3190 method = mono_jit_info_get_method (frame->ji);
3193 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3194 g_string_append_printf (p, " %s\n", location);
3197 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3203 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3205 GString* text = g_string_new (0);
3207 GError *error = NULL;
3210 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3212 g_string_append_printf (text, "\n\"%s\"", name);
3215 else if (thread->threadpool_thread)
3216 g_string_append (text, "\n\"<threadpool thread>\"");
3218 g_string_append (text, "\n\"<unnamed thread>\"");
3221 /* This no longer works with remote unwinding */
3223 wapi_desc = wapi_current_thread_desc ();
3224 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3229 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3230 mono_thread_info_finish_suspend_and_resume (info);
3232 fprintf (stdout, "%s", text->str);
3234 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3235 OutputDebugStringA(text->str);
3238 g_string_free (text, TRUE);
3243 dump_thread (gpointer key, gpointer value, gpointer user)
3245 MonoInternalThread *thread = (MonoInternalThread *)value;
3246 MonoThreadInfo *info;
3248 if (thread == mono_thread_internal_current ())
3252 FIXME This still can hang if we stop a thread during malloc.
3253 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3254 that takes a callback and runs it with the target suspended.
3255 We probably should loop a bit around trying to get it to either managed code
3258 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3263 print_thread_dump (thread, info);
3267 mono_threads_perform_thread_dump (void)
3269 if (!thread_dump_requested)
3272 printf ("Full thread dump:\n");
3274 /* We take the loader lock and the root domain lock as to increase our odds of not deadlocking if
3275 something needs then in the process.
3277 mono_loader_lock ();
3278 mono_domain_lock (mono_get_root_domain ());
3280 mono_threads_lock ();
3281 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3282 mono_threads_unlock ();
3284 mono_domain_unlock (mono_get_root_domain ());
3285 mono_loader_unlock ();
3287 thread_dump_requested = FALSE;
3291 * mono_threads_request_thread_dump:
3293 * Ask all threads except the current to print their stacktrace to stdout.
3296 mono_threads_request_thread_dump (void)
3298 struct wait_data wait_data;
3299 struct wait_data *wait = &wait_data;
3302 /*The new thread dump code runs out of the finalizer thread. */
3303 if (mono_thread_info_new_interrupt_enabled ()) {
3304 thread_dump_requested = TRUE;
3305 mono_gc_finalize_notify ();
3310 memset (wait, 0, sizeof (struct wait_data));
3313 * Make a copy of the hashtable since we can't do anything with
3314 * threads while threads_mutex is held.
3316 mono_threads_lock ();
3317 mono_g_hash_table_foreach (threads, collect_threads, wait);
3318 mono_threads_unlock ();
3320 for (i = 0; i < wait->num; ++i) {
3321 MonoInternalThread *thread = wait->threads [i];
3323 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3324 (thread != mono_thread_internal_current ()) &&
3325 !thread->thread_dump_requested) {
3326 thread->thread_dump_requested = TRUE;
3328 signal_thread_state_change (thread);
3331 CloseHandle (wait->handles [i]);
3337 gint allocated; /* +1 so that refs [allocated] == NULL */
3341 typedef struct ref_stack RefStack;
3344 ref_stack_new (gint initial_size)
3348 initial_size = MAX (initial_size, 16) + 1;
3349 rs = g_new0 (RefStack, 1);
3350 rs->refs = g_new0 (gpointer, initial_size);
3351 rs->allocated = initial_size;
3356 ref_stack_destroy (gpointer ptr)
3367 ref_stack_push (RefStack *rs, gpointer ptr)
3369 g_assert (rs != NULL);
3371 if (rs->bottom >= rs->allocated) {
3372 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3373 rs->allocated <<= 1;
3374 rs->refs [rs->allocated] = NULL;
3376 rs->refs [rs->bottom++] = ptr;
3380 ref_stack_pop (RefStack *rs)
3382 if (rs == NULL || rs->bottom == 0)
3386 rs->refs [rs->bottom] = NULL;
3390 ref_stack_find (RefStack *rs, gpointer ptr)
3397 for (refs = rs->refs; refs && *refs; refs++) {
3405 * mono_thread_push_appdomain_ref:
3407 * Register that the current thread may have references to objects in domain
3408 * @domain on its stack. Each call to this function should be paired with a
3409 * call to pop_appdomain_ref.
3412 mono_thread_push_appdomain_ref (MonoDomain *domain)
3414 MonoInternalThread *thread = mono_thread_internal_current ();
3417 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3418 SPIN_LOCK (thread->lock_thread_id);
3419 if (thread->appdomain_refs == NULL)
3420 thread->appdomain_refs = ref_stack_new (16);
3421 ref_stack_push (thread->appdomain_refs, domain);
3422 SPIN_UNLOCK (thread->lock_thread_id);
3427 mono_thread_pop_appdomain_ref (void)
3429 MonoInternalThread *thread = mono_thread_internal_current ();
3432 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3433 SPIN_LOCK (thread->lock_thread_id);
3434 ref_stack_pop (thread->appdomain_refs);
3435 SPIN_UNLOCK (thread->lock_thread_id);
3440 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3443 SPIN_LOCK (thread->lock_thread_id);
3444 res = ref_stack_find (thread->appdomain_refs, domain);
3445 SPIN_UNLOCK (thread->lock_thread_id);
3450 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3452 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3455 typedef struct abort_appdomain_data {
3456 struct wait_data wait;
3458 } abort_appdomain_data;
3461 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3463 MonoInternalThread *thread = (MonoInternalThread*)value;
3464 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3465 MonoDomain *domain = data->domain;
3467 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3468 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3470 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3471 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3474 data->wait.handles [data->wait.num] = handle;
3475 data->wait.threads [data->wait.num] = thread;
3478 /* Just ignore the rest, we can't do anything with
3486 * mono_threads_abort_appdomain_threads:
3488 * Abort threads which has references to the given appdomain.
3491 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3493 #ifdef __native_client__
3497 abort_appdomain_data user_data;
3499 int orig_timeout = timeout;
3502 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3504 start_time = mono_msec_ticks ();
3506 mono_threads_lock ();
3508 user_data.domain = domain;
3509 user_data.wait.num = 0;
3510 /* This shouldn't take any locks */
3511 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3512 mono_threads_unlock ();
3514 if (user_data.wait.num > 0) {
3515 /* Abort the threads outside the threads lock */
3516 for (i = 0; i < user_data.wait.num; ++i)
3517 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3520 * We should wait for the threads either to abort, or to leave the
3521 * domain. We can't do the latter, so we wait with a timeout.
3523 wait_for_tids (&user_data.wait, 100);
3526 /* Update remaining time */
3527 timeout -= mono_msec_ticks () - start_time;
3528 start_time = mono_msec_ticks ();
3530 if (orig_timeout != -1 && timeout < 0)
3533 while (user_data.wait.num > 0);
3535 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3541 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3543 MonoInternalThread *thread = (MonoInternalThread*)value;
3544 MonoDomain *domain = (MonoDomain*)user_data;
3547 /* No locking needed here */
3548 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3550 if (thread->cached_culture_info) {
3551 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3552 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3553 if (obj && obj->vtable->domain == domain)
3554 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3560 * mono_threads_clear_cached_culture:
3562 * Clear the cached_current_culture from all threads if it is in the
3566 mono_threads_clear_cached_culture (MonoDomain *domain)
3568 mono_threads_lock ();
3569 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3570 mono_threads_unlock ();
3574 * mono_thread_get_undeniable_exception:
3576 * Return an exception which needs to be raised when leaving a catch clause.
3577 * This is used for undeniable exception propagation.
3580 mono_thread_get_undeniable_exception (void)
3582 MonoInternalThread *thread = mono_thread_internal_current ();
3584 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3586 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3587 * exception if the thread no longer references a dying appdomain.
3589 thread->abort_exc->trace_ips = NULL;
3590 thread->abort_exc->stack_trace = NULL;
3591 return thread->abort_exc;
3597 #if MONO_SMALL_CONFIG
3598 #define NUM_STATIC_DATA_IDX 4
3599 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3603 #define NUM_STATIC_DATA_IDX 8
3604 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3605 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3609 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3612 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3615 gpointer *static_data = addr;
3616 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3619 if (!static_data [i])
3621 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3622 ptr = static_data [i];
3623 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3624 uintptr_t bmap = static_reference_bitmaps [i][j];
3627 if ((bmap & 1) && *p) {
3628 mark_func (p, gc_data);
3638 * mono_alloc_static_data
3640 * Allocate memory blocks for storing threads or context static data
3643 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3645 guint idx = (offset >> 24) - 1;
3648 gpointer* static_data = *static_data_ptr;
3650 static void* tls_desc = NULL;
3651 if (mono_gc_user_markers_supported () && !tls_desc)
3652 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3653 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3654 *static_data_ptr = static_data;
3655 static_data [0] = static_data;
3658 for (i = 1; i <= idx; ++i) {
3659 if (static_data [i])
3661 if (mono_gc_user_markers_supported () && threadlocal)
3662 static_data [i] = g_malloc0 (static_data_size [i]);
3664 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3669 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3672 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3673 gpointer p = static_data [i];
3677 * At this point, the static data pointer array is still registered with the
3678 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3679 * data. Freeing the individual arrays without first nulling their slots
3680 * would make it possible for mark_tls_slots() to encounter a pointer to
3681 * such an already freed array. See bug #13813.
3683 static_data [i] = NULL;
3684 mono_memory_write_barrier ();
3685 if (mono_gc_user_markers_supported () && threadlocal)
3688 mono_gc_free_fixed (p);
3690 mono_gc_free_fixed (static_data);
3694 * mono_init_static_data_info
3696 * Initializes static data counters
3698 static void mono_init_static_data_info (StaticDataInfo *static_data)
3700 static_data->idx = 0;
3701 static_data->offset = 0;
3702 static_data->freelist = NULL;
3706 * mono_alloc_static_data_slot
3708 * Generates an offset for static data. static_data contains the counters
3709 * used to generate it.
3712 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3716 if (!static_data->idx && !static_data->offset) {
3718 * we use the first chunk of the first allocation also as
3719 * an array for the rest of the data
3721 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3723 static_data->offset += align - 1;
3724 static_data->offset &= ~(align - 1);
3725 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3726 static_data->idx ++;
3727 g_assert (size <= static_data_size [static_data->idx]);
3728 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3729 static_data->offset = 0;
3731 offset = static_data->offset | ((static_data->idx + 1) << 24);
3732 static_data->offset += size;
3737 * ensure thread static fields already allocated are valid for thread
3738 * This function is called when a thread is created or on thread attach.
3741 thread_adjust_static_data (MonoInternalThread *thread)
3745 mono_threads_lock ();
3746 if (thread_static_info.offset || thread_static_info.idx > 0) {
3747 /* get the current allocated size */
3748 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3749 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3751 mono_threads_unlock ();
3755 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3757 MonoInternalThread *thread = value;
3758 guint32 offset = GPOINTER_TO_UINT (user);
3760 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3763 static MonoThreadDomainTls*
3764 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3766 MonoThreadDomainTls* prev = NULL;
3767 MonoThreadDomainTls* tmp = static_data->freelist;
3769 if (tmp->size == size) {
3771 prev->next = tmp->next;
3773 static_data->freelist = tmp->next;
3782 #if SIZEOF_VOID_P == 4
3789 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3792 int idx = (offset >> 24) - 1;
3794 if (!static_reference_bitmaps [idx])
3795 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3796 rb = static_reference_bitmaps [idx];
3798 offset /= sizeof (gpointer);
3799 /* offset is now the bitmap offset */
3800 for (i = 0; i < numbits; ++i) {
3801 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3802 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (ONE_P << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3807 clear_reference_bitmap (guint32 offset, guint32 size)
3809 int idx = (offset >> 24) - 1;
3811 rb = static_reference_bitmaps [idx];
3813 offset /= sizeof (gpointer);
3814 size /= sizeof (gpointer);
3816 /* offset is now the bitmap offset */
3817 for (; offset < size; ++offset)
3818 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3822 * The offset for a special static variable is composed of three parts:
3823 * a bit that indicates the type of static data (0:thread, 1:context),
3824 * an index in the array of chunks of memory for the thread (thread->static_data)
3825 * and an offset in that chunk of mem. This allows allocating less memory in the
3830 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3833 if (static_type == SPECIAL_STATIC_THREAD) {
3834 MonoThreadDomainTls *item;
3835 mono_threads_lock ();
3836 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3837 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3839 offset = item->offset;
3842 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3844 update_tls_reference_bitmap (offset, bitmap, numbits);
3845 /* This can be called during startup */
3846 if (threads != NULL)
3847 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3848 mono_threads_unlock ();
3850 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3851 mono_contexts_lock ();
3852 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3853 mono_contexts_unlock ();
3854 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3860 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3862 /* The high bit means either thread (0) or static (1) data. */
3864 guint32 static_type = (offset & 0x80000000);
3867 offset &= 0x7fffffff;
3868 idx = (offset >> 24) - 1;
3870 if (static_type == 0) {
3871 return get_thread_static_data (thread, offset);
3873 /* Allocate static data block under demand, since we don't have a list
3876 MonoAppContext *context = mono_context_get ();
3877 if (!context->static_data || !context->static_data [idx]) {
3878 mono_contexts_lock ();
3879 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3880 mono_contexts_unlock ();
3882 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3887 mono_get_special_static_data (guint32 offset)
3889 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3898 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3900 MonoInternalThread *thread = value;
3901 TlsOffsetSize *data = user;
3902 int idx = (data->offset >> 24) - 1;
3905 if (!thread->static_data || !thread->static_data [idx])
3907 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3908 mono_gc_bzero_atomic (ptr, data->size);
3912 do_free_special_slot (guint32 offset, guint32 size)
3914 guint32 static_type = (offset & 0x80000000);
3915 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3916 if (static_type == 0) {
3918 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3919 data.offset = offset & 0x7fffffff;
3921 clear_reference_bitmap (data.offset, data.size);
3922 if (threads != NULL)
3923 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3924 item->offset = offset;
3927 if (!mono_runtime_is_shutting_down ()) {
3928 item->next = thread_static_info.freelist;
3929 thread_static_info.freelist = item;
3931 /* We could be called during shutdown after mono_thread_cleanup () is called */
3935 /* FIXME: free context static data as well */
3940 do_free_special (gpointer key, gpointer value, gpointer data)
3942 MonoClassField *field = key;
3943 guint32 offset = GPOINTER_TO_UINT (value);
3946 size = mono_type_size (field->type, &align);
3947 do_free_special_slot (offset, size);
3951 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3953 mono_threads_lock ();
3954 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3955 mono_threads_unlock ();
3959 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3961 mono_threads_lock ();
3962 do_free_special_slot (offset, size);
3963 mono_threads_unlock ();
3967 * allocates room in the thread local area for storing an instance of the struct type
3968 * the allocation is kept track of in domain->tlsrec_list.
3971 mono_thread_alloc_tls (MonoReflectionType *type)
3973 MonoDomain *domain = mono_domain_get ();
3975 MonoTlsDataRecord *tlsrec;
3978 gsize default_bitmap [4] = {0};
3979 uint32_t tls_offset;
3983 klass = mono_class_from_mono_type (type->type);
3984 /* TlsDatum is a struct, so we subtract the object header size offset */
3985 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3986 size = mono_type_size (type->type, &align);
3987 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3988 if (bitmap != default_bitmap)
3990 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3991 tlsrec->tls_offset = tls_offset;
3992 tlsrec->size = size;
3993 mono_domain_lock (domain);
3994 tlsrec->next = domain->tlsrec_list;
3995 domain->tlsrec_list = tlsrec;
3996 mono_domain_unlock (domain);
4001 mono_thread_destroy_tls (uint32_t tls_offset)
4003 MonoTlsDataRecord *prev = NULL;
4004 MonoTlsDataRecord *cur;
4006 MonoDomain *domain = mono_domain_get ();
4007 mono_domain_lock (domain);
4008 cur = domain->tlsrec_list;
4010 if (cur->tls_offset == tls_offset) {
4012 prev->next = cur->next;
4014 domain->tlsrec_list = cur->next;
4022 mono_domain_unlock (domain);
4024 mono_special_static_data_free_slot (tls_offset, size);
4028 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4031 mono_thread_destroy_domain_tls (MonoDomain *domain)
4033 while (domain->tlsrec_list)
4034 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
4037 static MonoClassField *local_slots = NULL;
4040 /* local tls data to get locals_slot from a thread */
4043 /* index in the locals_slot array */
4048 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4050 LocalSlotID *sid = user_data;
4051 MonoInternalThread *thread = (MonoInternalThread*)value;
4052 MonoArray *slots_array;
4054 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4055 * it is for the right domain, so we need to check if it is allocated an initialized
4056 * for the current thread.
4058 /*g_print ("handling thread %p\n", thread);*/
4059 if (!thread->static_data || !thread->static_data [sid->idx])
4061 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4062 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4064 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4068 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4076 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4078 g_warning ("local_slots field not found in Thread class");
4082 domain = mono_domain_get ();
4083 mono_domain_lock (domain);
4084 if (domain->special_static_fields)
4085 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4086 mono_domain_unlock (domain);
4089 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4090 sid.offset = GPOINTER_TO_UINT (addr);
4091 sid.offset &= 0x7fffffff;
4092 sid.idx = (sid.offset >> 24) - 1;
4093 mono_threads_lock ();
4094 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4095 mono_threads_unlock ();
4097 /* FIXME: clear the slot for MonoAppContexts, too */
4102 static void CALLBACK dummy_apc (ULONG_PTR param)
4108 * mono_thread_execute_interruption
4110 * Performs the operation that the requested thread state requires (abort,
4113 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4115 LOCK_THREAD (thread);
4117 /* MonoThread::interruption_requested can only be changed with atomics */
4118 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4119 /* this will consume pending APC calls */
4121 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4123 InterlockedDecrement (&thread_interruption_requested);
4124 /* Clear the interrupted flag of the thread so it can wait again */
4125 mono_thread_info_clear_interruption ();
4128 if ((thread->state & ThreadState_AbortRequested) != 0) {
4129 UNLOCK_THREAD (thread);
4130 if (thread->abort_exc == NULL) {
4132 * This might be racy, but it has to be called outside the lock
4133 * since it calls managed code.
4135 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4137 return thread->abort_exc;
4139 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4140 self_suspend_internal (thread);
4143 else if ((thread->state & ThreadState_StopRequested) != 0) {
4144 /* FIXME: do this through the JIT? */
4146 UNLOCK_THREAD (thread);
4148 mono_thread_exit ();
4150 } else if (thread->pending_exception) {
4153 exc = thread->pending_exception;
4154 thread->pending_exception = NULL;
4156 UNLOCK_THREAD (thread);
4158 } else if (thread->thread_interrupt_requested) {
4160 thread->thread_interrupt_requested = FALSE;
4161 UNLOCK_THREAD (thread);
4163 return(mono_get_exception_thread_interrupted ());
4166 UNLOCK_THREAD (thread);
4172 * mono_thread_request_interruption
4174 * A signal handler can call this method to request the interruption of a
4175 * thread. The result of the interruption will depend on the current state of
4176 * the thread. If the result is an exception that needs to be throw, it is
4177 * provided as return value.
4180 mono_thread_request_interruption (gboolean running_managed)
4182 MonoInternalThread *thread = mono_thread_internal_current ();
4184 /* The thread may already be stopping */
4189 if (thread->interrupt_on_stop &&
4190 thread->state & ThreadState_StopRequested &&
4191 thread->state & ThreadState_Background)
4195 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4197 InterlockedIncrement (&thread_interruption_requested);
4199 if (!running_managed || is_running_protected_wrapper ()) {
4200 /* Can't stop while in unmanaged code. Increase the global interruption
4201 request count. When exiting the unmanaged method the count will be
4202 checked and the thread will be interrupted. */
4204 if (mono_thread_notify_pending_exc_fn && !running_managed)
4205 /* The JIT will notify the thread about the interruption */
4206 /* This shouldn't take any locks */
4207 mono_thread_notify_pending_exc_fn (NULL);
4209 /* this will awake the thread if it is in WaitForSingleObject
4211 /* Our implementation of this function ignores the func argument */
4213 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4215 mono_thread_info_self_interrupt ();
4220 return mono_thread_execute_interruption (thread);
4224 /*This function should be called by a thread after it has exited all of
4225 * its handle blocks at interruption time.*/
4227 mono_thread_resume_interruption (void)
4229 MonoInternalThread *thread = mono_thread_internal_current ();
4230 gboolean still_aborting;
4232 /* The thread may already be stopping */
4236 LOCK_THREAD (thread);
4237 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4238 UNLOCK_THREAD (thread);
4240 /*This can happen if the protected block called Thread::ResetAbort*/
4241 if (!still_aborting)
4244 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4246 InterlockedIncrement (&thread_interruption_requested);
4248 mono_thread_info_self_interrupt ();
4250 return mono_thread_execute_interruption (thread);
4253 gboolean mono_thread_interruption_requested ()
4255 if (thread_interruption_requested) {
4256 MonoInternalThread *thread = mono_thread_internal_current ();
4257 /* The thread may already be stopping */
4259 return (thread->interruption_requested);
4264 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4266 MonoInternalThread *thread = mono_thread_internal_current ();
4268 /* The thread may already be stopping */
4272 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4273 MonoException* exc = mono_thread_execute_interruption (thread);
4274 if (exc) mono_raise_exception (exc);
4279 * Performs the interruption of the current thread, if one has been requested,
4280 * and the thread is not running a protected wrapper.
4282 void mono_thread_interruption_checkpoint ()
4284 mono_thread_interruption_checkpoint_request (FALSE);
4288 * Performs the interruption of the current thread, if one has been requested.
4290 void mono_thread_force_interruption_checkpoint ()
4292 mono_thread_interruption_checkpoint_request (TRUE);
4296 * mono_thread_get_and_clear_pending_exception:
4298 * Return any pending exceptions for the current thread and clear it as a side effect.
4301 mono_thread_get_and_clear_pending_exception (void)
4303 MonoInternalThread *thread = mono_thread_internal_current ();
4305 /* The thread may already be stopping */
4309 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4310 return mono_thread_execute_interruption (thread);
4313 if (thread->pending_exception) {
4314 MonoException *exc = thread->pending_exception;
4316 thread->pending_exception = NULL;
4324 * mono_set_pending_exception:
4326 * Set the pending exception of the current thread to EXC.
4327 * The exception will be thrown when execution returns to managed code.
4330 mono_set_pending_exception (MonoException *exc)
4332 MonoInternalThread *thread = mono_thread_internal_current ();
4334 /* The thread may already be stopping */
4338 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4340 mono_thread_request_interruption (FALSE);
4344 * mono_thread_interruption_request_flag:
4346 * Returns the address of a flag that will be non-zero if an interruption has
4347 * been requested for a thread. The thread to interrupt may not be the current
4348 * thread, so an additional call to mono_thread_interruption_requested() or
4349 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4352 gint32* mono_thread_interruption_request_flag ()
4354 return &thread_interruption_requested;
4358 mono_thread_init_apartment_state (void)
4361 MonoInternalThread* thread = mono_thread_internal_current ();
4363 /* Positive return value indicates success, either
4364 * S_OK if this is first CoInitialize call, or
4365 * S_FALSE if CoInitialize already called, but with same
4366 * threading model. A negative value indicates failure,
4367 * probably due to trying to change the threading model.
4369 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4370 ? COINIT_APARTMENTTHREADED
4371 : COINIT_MULTITHREADED) < 0) {
4372 thread->apartment_state = ThreadApartmentState_Unknown;
4378 mono_thread_cleanup_apartment_state (void)
4381 MonoInternalThread* thread = mono_thread_internal_current ();
4383 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4390 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4392 LOCK_THREAD (thread);
4393 thread->state |= state;
4394 UNLOCK_THREAD (thread);
4398 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4400 LOCK_THREAD (thread);
4401 thread->state &= ~state;
4402 UNLOCK_THREAD (thread);
4406 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4408 gboolean ret = FALSE;
4410 LOCK_THREAD (thread);
4412 if ((thread->state & test) != 0) {
4416 UNLOCK_THREAD (thread);
4421 //static MonoClassField *execution_context_field;
4424 get_execution_context_addr (void)
4426 MonoDomain *domain = mono_domain_get ();
4427 guint32 offset = domain->execution_context_field_offset;
4430 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4433 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4435 mono_domain_lock (domain);
4436 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4437 mono_domain_unlock (domain);
4440 domain->execution_context_field_offset = offset;
4443 return (MonoObject**) mono_get_special_static_data (offset);
4447 mono_thread_get_execution_context (void)
4449 return *get_execution_context_addr ();
4453 mono_thread_set_execution_context (MonoObject *ec)
4455 *get_execution_context_addr () = ec;
4458 static gboolean has_tls_get = FALSE;
4461 mono_runtime_set_has_tls_get (gboolean val)
4467 mono_runtime_has_tls_get (void)
4473 mono_thread_kill (MonoInternalThread *thread, int signal)
4475 #ifdef __native_client__
4476 /* Workaround pthread_kill abort() in NaCl glibc. */
4480 /* Win32 uses QueueUserAPC and callers of this are guarded */
4481 g_assert_not_reached ();
4483 # ifdef PTHREAD_POINTER_ID
4484 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4486 # ifdef USE_TKILL_ON_ANDROID
4487 if (thread->android_tid != 0) {
4489 int old_errno = errno;
4491 ret = tkill ((pid_t) thread->android_tid, signal);
4500 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4502 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4509 self_interrupt_thread (void *_unused)
4511 MonoThreadInfo *info = mono_thread_info_current ();
4512 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4513 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4514 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4515 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4519 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4523 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4527 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4529 MonoJitInfo **dest = data;
4535 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4537 MonoJitInfo *ji = NULL;
4540 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4545 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4548 MonoThreadInfo *info = NULL;
4549 gboolean protected_wrapper;
4550 gboolean running_managed;
4552 if (!mono_thread_info_new_interrupt_enabled ()) {
4553 signal_thread_state_change (thread);
4558 FIXME this is insanely broken, it doesn't cause interruption to happen
4559 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4561 if (thread == mono_thread_internal_current ()) {
4562 /* Do it synchronously */
4563 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4565 mono_raise_exception (exc);
4566 mono_thread_info_interrupt (thread->handle);
4570 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4571 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4575 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4576 mono_thread_info_finish_suspend_and_resume (info);
4580 /*someone is already interrupting it*/
4581 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4582 mono_thread_info_finish_suspend_and_resume (info);
4585 InterlockedIncrement (&thread_interruption_requested);
4587 ji = mono_thread_info_get_last_managed (info);
4588 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4589 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4591 if (!protected_wrapper && running_managed) {
4592 /*We are in managed code*/
4593 /*Set the thread to call */
4594 if (install_async_abort)
4595 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4596 mono_thread_info_finish_suspend_and_resume (info);
4599 * This will cause waits to be broken.
4600 * It will also prevent the thread from entering a wait, so if the thread returns
4601 * from the wait before it receives the abort signal, it will just spin in the wait
4602 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4605 gpointer interrupt_handle;
4607 if (mono_thread_notify_pending_exc_fn)
4608 /* The JIT will notify the thread about the interruption */
4609 mono_thread_notify_pending_exc_fn (info);
4611 interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4612 mono_thread_info_finish_suspend_and_resume (info);
4613 mono_thread_info_finish_interrupt (interrupt_handle);
4615 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4619 transition_to_suspended (MonoInternalThread *thread, MonoThreadInfo *info)
4621 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4622 g_assert (0); /*FIXME we should not reach this */
4623 /*Make sure we balance the suspend count.*/
4625 mono_thread_info_finish_suspend_and_resume (info);
4627 thread->state &= ~ThreadState_SuspendRequested;
4628 thread->state |= ThreadState_Suspended;
4630 mono_thread_info_finish_suspend (info);
4632 UNLOCK_THREAD (thread);
4636 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4638 if (!mono_thread_info_new_interrupt_enabled ()) {
4639 signal_thread_state_change (thread);
4643 LOCK_THREAD (thread);
4644 if (thread == mono_thread_internal_current ()) {
4645 transition_to_suspended (thread, NULL);
4646 mono_thread_info_self_suspend ();
4648 MonoThreadInfo *info;
4650 gboolean protected_wrapper;
4651 gboolean running_managed;
4653 /*A null info usually means the thread is already dead. */
4654 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4655 UNLOCK_THREAD (thread);
4659 ji = mono_thread_info_get_last_managed (info);
4660 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4661 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4663 if (running_managed && !protected_wrapper) {
4664 transition_to_suspended (thread, info);
4666 gpointer interrupt_handle;
4668 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4669 InterlockedIncrement (&thread_interruption_requested);
4671 interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4672 if (mono_thread_notify_pending_exc_fn && !running_managed)
4673 /* The JIT will notify the thread about the interruption */
4674 mono_thread_notify_pending_exc_fn (info);
4675 mono_thread_info_finish_suspend_and_resume (info);
4677 mono_thread_info_finish_interrupt (interrupt_handle);
4678 UNLOCK_THREAD (thread);
4683 /*This is called with @thread synch_cs held and it must release it*/
4685 self_suspend_internal (MonoInternalThread *thread)
4687 if (!mono_thread_info_new_interrupt_enabled ()) {
4688 thread->state &= ~ThreadState_SuspendRequested;
4689 thread->state |= ThreadState_Suspended;
4690 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4691 if (thread->suspend_event == NULL) {
4692 UNLOCK_THREAD (thread);
4695 if (thread->suspended_event)
4696 SetEvent (thread->suspended_event);
4698 UNLOCK_THREAD (thread);
4700 if (shutting_down) {
4701 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4706 WaitForSingleObject (thread->suspend_event, INFINITE);
4708 LOCK_THREAD (thread);
4710 CloseHandle (thread->suspend_event);
4711 thread->suspend_event = NULL;
4712 thread->state &= ~ThreadState_Suspended;
4714 /* The thread that requested the resume will have replaced this event
4715 * and will be waiting for it
4717 SetEvent (thread->resume_event);
4719 UNLOCK_THREAD (thread);
4723 transition_to_suspended (thread, NULL);
4724 mono_thread_info_self_suspend ();
4727 /*This is called with @thread synch_cs held and it must release it*/
4729 resume_thread_internal (MonoInternalThread *thread)
4731 if (!mono_thread_info_new_interrupt_enabled ()) {
4732 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4733 if (thread->resume_event == NULL) {
4734 UNLOCK_THREAD (thread);
4738 /* Awake the thread */
4739 SetEvent (thread->suspend_event);
4741 UNLOCK_THREAD (thread);
4743 /* Wait for the thread to awake */
4744 WaitForSingleObject (thread->resume_event, INFINITE);
4745 CloseHandle (thread->resume_event);
4746 thread->resume_event = NULL;
4750 UNLOCK_THREAD (thread);
4751 /* Awake the thread */
4752 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4754 LOCK_THREAD (thread);
4755 thread->state &= ~ThreadState_Suspended;
4756 UNLOCK_THREAD (thread);
4762 * mono_thread_is_foreign:
4763 * @thread: the thread to query
4765 * This function allows one to determine if a thread was created by the mono runtime and has
4766 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4768 * Returns: true if @thread was not created by the runtime.
4771 mono_thread_is_foreign (MonoThread *thread)
4773 MonoThreadInfo *info = thread->internal_thread->thread_info;
4774 return info->runtime_thread == FALSE;
4778 * mono_add_joinable_thread:
4780 * Add TID to the list of joinable threads.
4781 * LOCKING: Acquires the threads lock.
4784 mono_threads_add_joinable_thread (gpointer tid)
4788 * We cannot detach from threads because it causes problems like
4789 * 2fd16f60/r114307. So we collect them and join them when
4790 * we have time (in he finalizer thread).
4792 joinable_threads_lock ();
4793 if (!joinable_threads)
4794 joinable_threads = g_hash_table_new (NULL, NULL);
4795 g_hash_table_insert (joinable_threads, tid, tid);
4796 joinable_thread_count ++;
4797 joinable_threads_unlock ();
4799 mono_gc_finalize_notify ();
4804 * mono_threads_join_threads:
4806 * Join all joinable threads. This is called from the finalizer thread.
4807 * LOCKING: Acquires the threads lock.
4810 mono_threads_join_threads (void)
4813 GHashTableIter iter;
4820 if (!joinable_thread_count)
4824 joinable_threads_lock ();
4826 if (g_hash_table_size (joinable_threads)) {
4827 g_hash_table_iter_init (&iter, joinable_threads);
4828 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4829 thread = (pthread_t)tid;
4830 g_hash_table_remove (joinable_threads, key);
4831 joinable_thread_count --;
4834 joinable_threads_unlock ();
4836 if (thread != pthread_self ())
4837 /* This shouldn't block */
4838 pthread_join (thread, NULL);
4849 * Wait for thread TID to exit.
4850 * LOCKING: Acquires the threads lock.
4853 mono_thread_join (gpointer tid)
4857 gboolean found = FALSE;
4859 joinable_threads_lock ();
4860 if (!joinable_threads)
4861 joinable_threads = g_hash_table_new (NULL, NULL);
4862 if (g_hash_table_lookup (joinable_threads, tid)) {
4863 g_hash_table_remove (joinable_threads, tid);
4864 joinable_thread_count --;
4867 joinable_threads_unlock ();
4870 thread = (pthread_t)tid;
4871 pthread_join (thread, NULL);