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>
34 #include <mono/io-layer/threads.h>
36 #include <mono/metadata/object-internals.h>
37 #include <mono/metadata/mono-debug-debugger.h>
38 #include <mono/utils/mono-compiler.h>
39 #include <mono/utils/mono-mmap.h>
40 #include <mono/utils/mono-membar.h>
41 #include <mono/utils/mono-time.h>
42 #include <mono/utils/mono-threads.h>
43 #include <mono/utils/hazard-pointer.h>
44 #include <mono/utils/mono-tls.h>
45 #include <mono/utils/atomic.h>
46 #include <mono/utils/mono-memory-model.h>
48 #include <mono/metadata/gc-internal.h>
50 #ifdef PLATFORM_ANDROID
53 extern int tkill (pid_t tid, int signal);
56 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
57 #define THREAD_DEBUG(a)
58 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
59 #define THREAD_WAIT_DEBUG(a)
60 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
61 #define LIBGC_DEBUG(a)
63 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
64 #define SPIN_LOCK(i) do { \
65 if (SPIN_TRYLOCK (i)) \
69 #define SPIN_UNLOCK(i) i = 0
71 #define LOCK_THREAD(thread) lock_thread((thread))
72 #define UNLOCK_THREAD(thread) unlock_thread((thread))
74 /* Provide this for systems with glib < 2.6 */
75 #ifndef G_GSIZE_FORMAT
76 # if GLIB_SIZEOF_LONG == 8
77 # define G_GSIZE_FORMAT "lu"
79 # define G_GSIZE_FORMAT "u"
85 guint32 (*func)(void *);
101 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
102 struct _MonoThreadDomainTls {
103 MonoThreadDomainTls *next;
111 MonoThreadDomainTls *freelist;
114 /* Number of cached culture objects in the MonoThread->cached_culture_info array
115 * (per-type): we use the first NUM entries for CultureInfo and the last for
116 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
118 #define NUM_CACHED_CULTURES 4
119 #define CULTURES_START_IDX 0
120 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
122 /* Controls access to the 'threads' hash table */
123 #define mono_threads_lock() mono_mutex_lock (&threads_mutex)
124 #define mono_threads_unlock() mono_mutex_unlock (&threads_mutex)
125 static mono_mutex_t threads_mutex;
127 /* Controls access to context static data */
128 #define mono_contexts_lock() mono_mutex_lock (&contexts_mutex)
129 #define mono_contexts_unlock() mono_mutex_unlock (&contexts_mutex)
130 static mono_mutex_t contexts_mutex;
132 /* Controls access to the 'joinable_threads' hash table */
133 #define joinable_threads_lock() mono_mutex_lock (&joinable_threads_mutex)
134 #define joinable_threads_unlock() mono_mutex_unlock (&joinable_threads_mutex)
135 static mono_mutex_t joinable_threads_mutex;
137 /* Holds current status of static data heap */
138 static StaticDataInfo thread_static_info;
139 static StaticDataInfo context_static_info;
141 /* The hash of existing threads (key is thread ID, value is
142 * MonoInternalThread*) that need joining before exit
144 static MonoGHashTable *threads=NULL;
147 * Threads which are starting up and they are not in the 'threads' hash yet.
148 * When handle_store is called for a thread, it will be removed from this hash table.
149 * Protected by mono_threads_lock ().
151 static MonoGHashTable *threads_starting_up = NULL;
153 /* Maps a MonoThread to its start argument */
154 /* Protected by mono_threads_lock () */
155 static MonoGHashTable *thread_start_args = NULL;
157 /* The TLS key that holds the MonoObject assigned to each thread */
158 static MonoNativeTlsKey current_object_key;
161 /* Protected by the threads lock */
162 static GHashTable *joinable_threads;
163 static int joinable_thread_count;
165 #ifdef MONO_HAVE_FAST_TLS
166 /* we need to use both the Tls* functions and __thread because
167 * the gc needs to see all the threads
169 MONO_FAST_TLS_DECLARE(tls_current_object);
170 #define SET_CURRENT_OBJECT(x) do { \
171 MONO_FAST_TLS_SET (tls_current_object, x); \
172 mono_native_tls_set_value (current_object_key, x); \
174 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
176 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
177 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
180 /* function called at thread start */
181 static MonoThreadStartCB mono_thread_start_cb = NULL;
183 /* function called at thread attach */
184 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
186 /* function called at thread cleanup */
187 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
189 /* function called to notify the runtime about a pending exception on the current thread */
190 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
192 /* The default stack size for each thread */
193 static guint32 default_stacksize = 0;
194 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
196 static void thread_adjust_static_data (MonoInternalThread *thread);
197 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
198 static void mono_init_static_data_info (StaticDataInfo *static_data);
199 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
200 static gboolean mono_thread_resume (MonoInternalThread* thread);
201 static void signal_thread_state_change (MonoInternalThread *thread);
202 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
203 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
204 static void self_suspend_internal (MonoInternalThread *thread);
205 static gboolean resume_thread_internal (MonoInternalThread *thread);
207 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
208 static void ref_stack_destroy (gpointer rs);
210 /* Spin lock for InterlockedXXX 64 bit functions */
211 #define mono_interlocked_lock() mono_mutex_lock (&interlocked_mutex)
212 #define mono_interlocked_unlock() mono_mutex_unlock (&interlocked_mutex)
213 static mono_mutex_t interlocked_mutex;
215 /* global count of thread interruptions requested */
216 static gint32 thread_interruption_requested = 0;
218 /* Event signaled when a thread changes its background mode */
219 static HANDLE background_change_event;
221 static gboolean shutting_down = FALSE;
223 static gint32 managed_thread_id_counter = 0;
226 get_next_managed_thread_id (void)
228 return InterlockedIncrement (&managed_thread_id_counter);
232 mono_thread_get_tls_key (void)
234 return current_object_key;
238 mono_thread_get_tls_offset (void)
241 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
245 static inline MonoNativeThreadId
246 thread_get_tid (MonoInternalThread *thread)
248 /* We store the tid as a guint64 to keep the object layout constant between platforms */
249 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
252 /* handle_store() and handle_remove() manage the array of threads that
253 * still need to be waited for when the main thread exits.
255 * If handle_store() returns FALSE the thread must not be started
256 * because Mono is shutting down.
258 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
260 mono_threads_lock ();
262 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
264 if (threads_starting_up)
265 mono_g_hash_table_remove (threads_starting_up, thread);
267 if (shutting_down && !force_attach) {
268 mono_threads_unlock ();
273 MONO_GC_REGISTER_ROOT_FIXED (threads);
274 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
277 /* We don't need to duplicate thread->handle, because it is
278 * only closed when the thread object is finalized by the GC.
280 g_assert (thread->internal_thread);
281 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
282 thread->internal_thread);
284 mono_threads_unlock ();
289 static gboolean handle_remove(MonoInternalThread *thread)
292 gsize tid = thread->tid;
294 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
296 mono_threads_lock ();
299 /* We have to check whether the thread object for the
300 * tid is still the same in the table because the
301 * thread might have been destroyed and the tid reused
302 * in the meantime, in which case the tid would be in
303 * the table, but with another thread object.
305 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
306 mono_g_hash_table_remove (threads, (gpointer)tid);
315 mono_threads_unlock ();
317 /* Don't close the handle here, wait for the object finalizer
318 * to do it. Otherwise, the following race condition applies:
320 * 1) Thread exits (and handle_remove() closes the handle)
322 * 2) Some other handle is reassigned the same slot
324 * 3) Another thread tries to join the first thread, and
325 * blocks waiting for the reassigned handle to be signalled
326 * (which might never happen). This is possible, because the
327 * thread calling Join() still has a reference to the first
333 static void ensure_synch_cs_set (MonoInternalThread *thread)
335 mono_mutex_t *synch_cs;
337 if (thread->synch_cs != NULL) {
341 synch_cs = g_new0 (mono_mutex_t, 1);
342 mono_mutex_init_recursive (synch_cs);
344 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
345 synch_cs, NULL) != NULL) {
346 /* Another thread must have installed this CS */
347 mono_mutex_destroy (synch_cs);
353 lock_thread (MonoInternalThread *thread)
355 if (!thread->synch_cs)
356 ensure_synch_cs_set (thread);
358 g_assert (thread->synch_cs);
359 mono_mutex_lock (thread->synch_cs);
363 unlock_thread (MonoInternalThread *thread)
365 mono_mutex_unlock (thread->synch_cs);
369 * NOTE: this function can be called also for threads different from the current one:
370 * make sure no code called from it will ever assume it is run on the thread that is
371 * getting cleaned up.
373 static void thread_cleanup (MonoInternalThread *thread)
375 g_assert (thread != NULL);
377 if (thread->abort_state_handle) {
378 mono_gchandle_free (thread->abort_state_handle);
379 thread->abort_state_handle = 0;
381 thread->abort_exc = NULL;
382 thread->current_appcontext = NULL;
385 * This is necessary because otherwise we might have
386 * cross-domain references which will not get cleaned up when
387 * the target domain is unloaded.
389 if (thread->cached_culture_info) {
391 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
392 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
396 * thread->synch_cs can be NULL if this was called after
397 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
398 * This can happen only during shutdown.
399 * The shutting_down flag is not always set, so we can't assert on it.
401 if (thread->synch_cs)
402 LOCK_THREAD (thread);
404 thread->state |= ThreadState_Stopped;
405 thread->state &= ~ThreadState_Background;
407 if (thread->synch_cs)
408 UNLOCK_THREAD (thread);
411 An interruption request has leaked to cleanup. Adjust the global counter.
413 This can happen is the abort source thread finds the abortee (this) thread
414 in unmanaged code. If this thread never trips back to managed code or check
415 the local flag it will be left set and positively unbalance the global counter.
417 Leaving the counter unbalanced will cause a performance degradation since all threads
418 will now keep checking their local flags all the time.
420 if (InterlockedExchange (&thread->interruption_requested, 0))
421 InterlockedDecrement (&thread_interruption_requested);
423 /* if the thread is not in the hash it has been removed already */
424 if (!handle_remove (thread)) {
425 if (thread == mono_thread_internal_current ()) {
426 mono_domain_unset ();
427 mono_memory_barrier ();
429 /* This needs to be called even if handle_remove () fails */
430 if (mono_thread_cleanup_fn)
431 mono_thread_cleanup_fn (thread);
434 mono_release_type_locks (thread);
436 mono_profiler_thread_end (thread->tid);
438 if (thread == mono_thread_internal_current ()) {
440 * This will signal async signal handlers that the thread has exited.
441 * The profiler callback needs this to be set, so it cannot be done earlier.
443 mono_domain_unset ();
444 mono_memory_barrier ();
447 if (thread == mono_thread_internal_current ())
448 mono_thread_pop_appdomain_ref ();
450 thread->cached_culture_info = NULL;
452 mono_free_static_data (thread->static_data, TRUE);
453 thread->static_data = NULL;
454 ref_stack_destroy (thread->appdomain_refs);
455 thread->appdomain_refs = NULL;
457 if (mono_thread_cleanup_fn)
458 mono_thread_cleanup_fn (thread);
460 if (mono_gc_is_moving ()) {
461 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
462 thread->thread_pinning_ref = NULL;
467 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
470 g_assert ((offset & 0x80000000) == 0);
471 offset &= 0x7fffffff;
472 idx = (offset >> 24) - 1;
473 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
477 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
479 static MonoClassField *current_thread_field = NULL;
483 if (!current_thread_field) {
484 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
485 g_assert (current_thread_field);
488 mono_class_vtable (domain, mono_defaults.thread_class);
489 mono_domain_lock (domain);
490 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
491 mono_domain_unlock (domain);
494 return get_thread_static_data (thread, offset);
498 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
500 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
502 g_assert (current->obj.vtable->domain == domain);
504 g_assert (!*current_thread_ptr);
505 *current_thread_ptr = current;
509 create_thread_object (MonoDomain *domain)
511 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
512 return (MonoThread*)mono_gc_alloc_mature (vt);
516 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
518 MonoThread *thread = create_thread_object (domain);
519 MONO_OBJECT_SETREF (thread, internal_thread, internal);
523 static MonoInternalThread*
524 create_internal_thread (void)
526 MonoInternalThread *thread;
529 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
530 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
532 thread->synch_cs = g_new0 (mono_mutex_t, 1);
533 mono_mutex_init_recursive (thread->synch_cs);
535 thread->apartment_state = ThreadApartmentState_Unknown;
536 thread->managed_id = get_next_managed_thread_id ();
537 if (mono_gc_is_moving ()) {
538 thread->thread_pinning_ref = thread;
539 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
546 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
548 MonoDomain *domain = mono_get_root_domain ();
550 if (!candidate || candidate->obj.vtable->domain != domain)
551 candidate = new_thread_with_internal (domain, thread);
552 set_current_thread_for_domain (domain, thread, candidate);
553 g_assert (!thread->root_domain_thread);
554 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
557 static guint32 WINAPI start_wrapper_internal(void *data)
559 MonoThreadInfo *info;
560 StartInfo *start_info = (StartInfo *)data;
561 guint32 (*start_func)(void *);
565 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
568 MonoInternalThread *internal = start_info->obj->internal_thread;
569 MonoObject *start_delegate = start_info->delegate;
570 MonoDomain *domain = start_info->obj->obj.vtable->domain;
572 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
574 /* We can be sure start_info->obj->tid and
575 * start_info->obj->handle have been set, because the thread
576 * was created suspended, and these values were set before the
580 info = mono_thread_info_current ();
582 internal->thread_info = info;
587 SET_CURRENT_OBJECT (internal);
589 mono_monitor_init_tls ();
591 /* Every thread references the appdomain which created it */
592 mono_thread_push_appdomain_ref (domain);
594 if (!mono_domain_set (domain, FALSE)) {
595 /* No point in raising an appdomain_unloaded exception here */
596 /* FIXME: Cleanup here */
597 mono_thread_pop_appdomain_ref ();
601 start_func = start_info->func;
602 start_arg = start_info->start_arg;
604 /* We have to do this here because mono_thread_new_init()
605 requires that root_domain_thread is set up. */
606 thread_adjust_static_data (internal);
607 init_root_domain_thread (internal, start_info->obj);
609 /* This MUST be called before any managed code can be
610 * executed, as it calls the callback function that (for the
611 * jit) sets the lmf marker.
613 mono_thread_new_init (tid, &tid, start_func);
614 internal->stack_ptr = &tid;
616 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
618 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
620 /* On 2.0 profile (and higher), set explicitly since state might have been
622 if (internal->apartment_state == ThreadApartmentState_Unknown)
623 internal->apartment_state = ThreadApartmentState_MTA;
625 mono_thread_init_apartment_state ();
627 if(internal->start_notify!=NULL) {
628 /* Let the thread that called Start() know we're
631 ReleaseSemaphore (internal->start_notify, 1, NULL);
634 mono_threads_lock ();
635 mono_g_hash_table_remove (thread_start_args, start_info->obj);
636 mono_threads_unlock ();
638 mono_thread_set_execution_context (start_info->obj->ec_to_set);
639 start_info->obj->ec_to_set = NULL;
642 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
646 * Call this after calling start_notify, since the profiler callback might want
647 * to lock the thread, and the lock is held by thread_start () which waits for
650 mono_profiler_thread_start (tid);
652 /* if the name was set before starting, we didn't invoke the profiler callback */
653 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
654 char *tname = g_utf16_to_utf8 (internal->name, -1, NULL, NULL, NULL);
655 mono_profiler_thread_name (internal->tid, tname);
658 /* start_func is set only for unmanaged start functions */
660 start_func (start_arg);
663 g_assert (start_delegate != NULL);
664 args [0] = start_arg;
665 /* we may want to handle the exception here. See comment below on unhandled exceptions */
666 mono_runtime_delegate_invoke (start_delegate, args, NULL);
669 /* If the thread calls ExitThread at all, this remaining code
670 * will not be executed, but the main thread will eventually
671 * call thread_cleanup() on this thread's behalf.
674 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
676 /* Do any cleanup needed for apartment state. This
677 * cannot be done in thread_cleanup since thread_cleanup could be
678 * called for a thread other than the current thread.
679 * mono_thread_cleanup_apartment_state cleans up apartment
680 * for the current thead */
681 mono_thread_cleanup_apartment_state ();
683 thread_cleanup (internal);
687 /* Remove the reference to the thread object in the TLS data,
688 * so the thread object can be finalized. This won't be
689 * reached if the thread threw an uncaught exception, so those
690 * thread handles will stay referenced :-( (This is due to
691 * missing support for scanning thread-specific data in the
692 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
695 SET_CURRENT_OBJECT (NULL);
700 static guint32 WINAPI start_wrapper(void *data)
704 /* Avoid scanning the frames above this frame during a GC */
705 mono_gc_set_stack_end ((void*)&dummy);
707 return start_wrapper_internal (data);
713 * Common thread creation code.
714 * LOCKING: Acquires the threads lock.
717 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
718 gboolean throw_on_failure)
720 HANDLE thread_handle;
721 MonoNativeThreadId tid;
722 guint32 create_flags;
725 * Join joinable threads to prevent running out of threads since the finalizer
726 * thread might be blocked/backlogged.
728 mono_threads_join_threads ();
730 mono_threads_lock ();
733 mono_threads_unlock ();
737 * The thread start argument may be an object reference, and there is
738 * no ref to keep it alive when the new thread is started but not yet
739 * registered with the collector. So we store it in a GC tracked hash
742 if (thread_start_args == NULL) {
743 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
744 thread_start_args = mono_g_hash_table_new (NULL, NULL);
746 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
747 if (threads_starting_up == NULL) {
748 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
749 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
751 mono_g_hash_table_insert (threads_starting_up, thread, thread);
752 mono_threads_unlock ();
754 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
755 if (!internal->start_notify) {
756 mono_threads_lock ();
757 mono_g_hash_table_remove (threads_starting_up, thread);
758 mono_threads_unlock ();
759 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
765 stack_size = default_stacksize_for_thread (internal);
767 /* Create suspended, so we can do some housekeeping before the thread
770 create_flags = CREATE_SUSPENDED;
771 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
772 stack_size, create_flags, &tid);
773 if (thread_handle == NULL) {
774 /* The thread couldn't be created, so throw an exception */
775 mono_threads_lock ();
776 mono_g_hash_table_remove (threads_starting_up, thread);
777 mono_threads_unlock ();
779 if (throw_on_failure)
780 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
782 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
785 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
787 internal->handle = thread_handle;
788 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
790 internal->threadpool_thread = threadpool_thread;
791 if (threadpool_thread)
792 mono_thread_set_state (internal, ThreadState_Background);
794 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
796 /* Only store the handle when the thread is about to be
797 * launched, to avoid the main thread deadlocking while trying
798 * to clean up a thread that will never be signalled.
800 if (!handle_store (thread, FALSE))
803 mono_thread_info_resume (tid);
805 if (internal->start_notify) {
807 * Wait for the thread to set up its TLS data etc, so
808 * theres no potential race condition if someone tries
809 * to look up the data believing the thread has
812 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
814 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
815 CloseHandle (internal->start_notify);
816 internal->start_notify = NULL;
819 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
824 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
826 if (mono_thread_start_cb) {
827 mono_thread_start_cb (tid, stack_start, func);
831 void mono_threads_set_default_stacksize (guint32 stacksize)
833 default_stacksize = stacksize;
836 guint32 mono_threads_get_default_stacksize (void)
838 return default_stacksize;
842 * mono_thread_create_internal:
846 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
849 MonoInternalThread *internal;
850 StartInfo *start_info;
853 thread = create_thread_object (domain);
854 internal = create_internal_thread ();
855 MONO_OBJECT_SETREF (thread, internal_thread, internal);
857 start_info = g_new0 (StartInfo, 1);
858 start_info->func = func;
859 start_info->obj = thread;
860 start_info->start_arg = arg;
862 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
866 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
867 if (mono_check_corlib_version () == NULL)
868 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
874 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
876 mono_thread_create_internal (domain, func, arg, FALSE, 0);
880 mono_thread_attach (MonoDomain *domain)
882 return mono_thread_attach_full (domain, FALSE);
886 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
888 MonoThreadInfo *info;
889 MonoInternalThread *thread;
890 MonoThread *current_thread;
891 HANDLE thread_handle;
894 if ((thread = mono_thread_internal_current ())) {
895 if (domain != mono_domain_get ())
896 mono_domain_set (domain, TRUE);
897 /* Already attached */
898 return mono_thread_current ();
901 if (!mono_gc_register_thread (&domain)) {
902 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 ());
905 thread = create_internal_thread ();
907 thread_handle = mono_thread_info_open_handle ();
908 g_assert (thread_handle);
910 tid=GetCurrentThreadId ();
912 thread->handle=thread_handle;
914 #ifdef PLATFORM_ANDROID
915 thread->android_tid = (gpointer) gettid ();
917 thread->stack_ptr = &tid;
919 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
921 info = mono_thread_info_current ();
923 thread->thread_info = info;
925 current_thread = new_thread_with_internal (domain, thread);
927 if (!handle_store (current_thread, force_attach)) {
928 /* Mono is shutting down, so just wait for the end */
933 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
935 SET_CURRENT_OBJECT (thread);
936 mono_domain_set (domain, TRUE);
938 mono_monitor_init_tls ();
940 thread_adjust_static_data (thread);
942 init_root_domain_thread (thread, current_thread);
943 if (domain != mono_get_root_domain ())
944 set_current_thread_for_domain (domain, thread, current_thread);
947 if (mono_thread_attach_cb) {
951 mono_thread_info_get_stack_bounds (&staddr, &stsize);
954 mono_thread_attach_cb (tid, &tid);
956 mono_thread_attach_cb (tid, staddr + stsize);
959 // FIXME: Need a separate callback
960 mono_profiler_thread_start (tid);
962 return current_thread;
966 mono_thread_detach_internal (MonoInternalThread *thread)
968 g_return_if_fail (thread != NULL);
970 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
972 thread_cleanup (thread);
974 SET_CURRENT_OBJECT (NULL);
975 mono_domain_unset ();
977 /* Don't need to CloseHandle this thread, even though we took a
978 * reference in mono_thread_attach (), because the GC will do it
979 * when the Thread object is finalised.
984 mono_thread_detach (MonoThread *thread)
987 mono_thread_detach_internal (thread->internal_thread);
991 * mono_thread_detach_if_exiting:
993 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
994 * This should be used at the end of embedding code which calls into managed code, and which
995 * can be called from pthread dtors, like dealloc: implementations in objective-c.
998 mono_thread_detach_if_exiting (void)
1000 if (mono_thread_info_is_exiting ()) {
1001 MonoInternalThread *thread;
1003 thread = mono_thread_internal_current ();
1005 mono_thread_detach_internal (thread);
1006 mono_thread_info_detach ();
1014 MonoInternalThread *thread = mono_thread_internal_current ();
1016 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1018 thread_cleanup (thread);
1019 SET_CURRENT_OBJECT (NULL);
1020 mono_domain_unset ();
1022 /* we could add a callback here for embedders to use. */
1023 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1024 exit (mono_environment_exitcode_get ());
1025 mono_thread_info_exit ();
1029 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1031 MonoInternalThread *internal = create_internal_thread ();
1033 internal->state = ThreadState_Unstarted;
1035 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1039 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this,
1042 StartInfo *start_info;
1043 MonoInternalThread *internal;
1046 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1048 if (!this->internal_thread)
1049 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1050 internal = this->internal_thread;
1052 LOCK_THREAD (internal);
1054 if ((internal->state & ThreadState_Unstarted) == 0) {
1055 UNLOCK_THREAD (internal);
1056 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1060 if ((internal->state & ThreadState_Aborted) != 0) {
1061 UNLOCK_THREAD (internal);
1064 /* This is freed in start_wrapper */
1065 start_info = g_new0 (StartInfo, 1);
1066 start_info->func = NULL;
1067 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1068 start_info->delegate = start;
1069 start_info->obj = this;
1070 g_assert (this->obj.vtable->domain == mono_domain_get ());
1072 res = create_thread (this, internal, start_info, FALSE, 0, FALSE);
1074 UNLOCK_THREAD (internal);
1078 internal->state &= ~ThreadState_Unstarted;
1080 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1082 UNLOCK_THREAD (internal);
1083 return internal->handle;
1087 * This is called from the finalizer of the internal thread object.
1090 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1092 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1095 * Since threads keep a reference to their thread object while running, by the time this function is called,
1096 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1097 * when thread_cleanup () can be called after this.
1100 CloseHandle (thread);
1102 if (this->synch_cs) {
1103 mono_mutex_t *synch_cs = this->synch_cs;
1104 this->synch_cs = NULL;
1105 mono_mutex_destroy (synch_cs);
1110 void *name = this->name;
1116 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1119 MonoInternalThread *thread = mono_thread_internal_current ();
1121 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1123 mono_thread_current_check_pending_interrupt ();
1126 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1128 res = SleepEx(ms,TRUE);
1130 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1132 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1133 MonoException* exc = mono_thread_execute_interruption (thread);
1135 mono_raise_exception (exc);
1147 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1152 ves_icall_System_Threading_Thread_GetDomainID (void)
1154 return mono_domain_get()->domain_id;
1158 ves_icall_System_Threading_Thread_Yield (void)
1160 return mono_thread_info_yield ();
1164 * mono_thread_get_name:
1166 * Return the name of the thread. NAME_LEN is set to the length of the name.
1167 * Return NULL if the thread has no name. The returned memory is owned by the
1171 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1175 LOCK_THREAD (this_obj);
1177 if (!this_obj->name) {
1181 *name_len = this_obj->name_len;
1182 res = g_new (gunichar2, this_obj->name_len);
1183 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1186 UNLOCK_THREAD (this_obj);
1192 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1196 LOCK_THREAD (this_obj);
1198 if (!this_obj->name)
1201 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1203 UNLOCK_THREAD (this_obj);
1209 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1211 LOCK_THREAD (this_obj);
1213 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1214 UNLOCK_THREAD (this_obj);
1216 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1220 this_obj->name = g_new (gunichar2, mono_string_length (name));
1221 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1222 this_obj->name_len = mono_string_length (name);
1225 this_obj->name = NULL;
1228 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1230 UNLOCK_THREAD (this_obj);
1232 if (this_obj->name && this_obj->tid) {
1233 char *tname = mono_string_to_utf8 (name);
1234 mono_profiler_thread_name (this_obj->tid, tname);
1235 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1241 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1243 mono_thread_set_name_internal (this_obj, name, TRUE);
1246 /* If the array is already in the requested domain, we just return it,
1247 otherwise we return a copy in that domain. */
1249 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1256 if (mono_object_domain (arr) == domain)
1259 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1260 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1265 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1267 return byte_array_to_domain (arr, mono_get_root_domain ());
1271 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1273 return byte_array_to_domain (arr, mono_domain_get ());
1277 mono_thread_current (void)
1279 MonoDomain *domain = mono_domain_get ();
1280 MonoInternalThread *internal = mono_thread_internal_current ();
1281 MonoThread **current_thread_ptr;
1283 g_assert (internal);
1284 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1286 if (!*current_thread_ptr) {
1287 g_assert (domain != mono_get_root_domain ());
1288 *current_thread_ptr = new_thread_with_internal (domain, internal);
1290 return *current_thread_ptr;
1294 mono_thread_internal_current (void)
1296 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1297 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1301 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1302 int ms, HANDLE thread)
1304 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1307 mono_thread_current_check_pending_interrupt ();
1311 if ((this->state & ThreadState_Unstarted) != 0) {
1312 UNLOCK_THREAD (this);
1314 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1318 UNLOCK_THREAD (this);
1323 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1325 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1327 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1329 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1331 if(ret==WAIT_OBJECT_0) {
1332 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1337 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1343 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1351 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1354 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1356 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1358 if (ret != WAIT_IO_COMPLETION)
1361 exc = mono_thread_execute_interruption (thread);
1363 mono_raise_exception (exc);
1368 /* Re-calculate ms according to the time passed */
1369 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1370 if (diff_ms >= ms) {
1374 wait = ms - diff_ms;
1380 /* FIXME: exitContext isnt documented */
1381 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1387 MonoObject *waitHandle;
1388 MonoInternalThread *thread = mono_thread_internal_current ();
1390 /* Do this WaitSleepJoin check before creating objects */
1391 mono_thread_current_check_pending_interrupt ();
1393 /* We fail in managed if the array has more than 64 elements */
1394 numhandles = (guint32)mono_array_length(mono_handles);
1395 handles = g_new0(HANDLE, numhandles);
1397 for(i = 0; i < numhandles; i++) {
1398 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1399 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1406 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1408 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1410 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1414 if(ret==WAIT_FAILED) {
1415 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1417 } else if(ret==WAIT_TIMEOUT) {
1418 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1425 /* FIXME: exitContext isnt documented */
1426 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1428 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1429 uintptr_t numhandles;
1432 MonoObject *waitHandle;
1433 MonoInternalThread *thread = mono_thread_internal_current ();
1435 /* Do this WaitSleepJoin check before creating objects */
1436 mono_thread_current_check_pending_interrupt ();
1438 numhandles = mono_array_length(mono_handles);
1439 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1442 for(i = 0; i < numhandles; i++) {
1443 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1444 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1451 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1453 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1455 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1457 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1460 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1462 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1463 return ret - WAIT_OBJECT_0;
1465 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1466 return ret - WAIT_ABANDONED_0;
1473 /* FIXME: exitContext isnt documented */
1474 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1477 MonoInternalThread *thread = mono_thread_internal_current ();
1479 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1485 mono_thread_current_check_pending_interrupt ();
1487 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1489 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1491 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1493 if(ret==WAIT_FAILED) {
1494 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1496 } else if(ret==WAIT_TIMEOUT) {
1497 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1505 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1508 MonoInternalThread *thread = mono_thread_internal_current ();
1513 mono_thread_current_check_pending_interrupt ();
1515 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1517 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1519 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1521 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1524 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1531 mutex = CreateMutex (NULL, owned, NULL);
1533 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1535 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1543 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1544 return(ReleaseMutex (handle));
1547 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1553 *error = ERROR_SUCCESS;
1555 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1557 *error = GetLastError ();
1564 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1571 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1573 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1574 mono_string_chars (name));
1576 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1584 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1588 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1593 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1597 *error = ERROR_SUCCESS;
1599 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1601 *error = GetLastError ();
1607 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1614 event = CreateEvent (NULL, manual, initial, NULL);
1616 event = CreateEvent (NULL, manual, initial,
1617 mono_string_chars (name));
1619 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1627 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1628 return (SetEvent(handle));
1631 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1632 return (ResetEvent(handle));
1636 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1637 CloseHandle (handle);
1640 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1646 *error = ERROR_SUCCESS;
1648 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1650 *error = GetLastError ();
1656 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1658 return InterlockedIncrement (location);
1661 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1663 #if SIZEOF_VOID_P == 4
1664 if (G_UNLIKELY ((size_t)location & 0x7)) {
1666 mono_interlocked_lock ();
1669 mono_interlocked_unlock ();
1673 return InterlockedIncrement64 (location);
1676 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1678 return InterlockedDecrement(location);
1681 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1683 #if SIZEOF_VOID_P == 4
1684 if (G_UNLIKELY ((size_t)location & 0x7)) {
1686 mono_interlocked_lock ();
1689 mono_interlocked_unlock ();
1693 return InterlockedDecrement64 (location);
1696 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1698 return InterlockedExchange(location, value);
1701 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1704 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1705 mono_gc_wbarrier_generic_nostore (location);
1709 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1711 return InterlockedExchangePointer(location, value);
1714 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1716 IntFloatUnion val, ret;
1719 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1725 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1727 #if SIZEOF_VOID_P == 4
1728 if (G_UNLIKELY ((size_t)location & 0x7)) {
1730 mono_interlocked_lock ();
1733 mono_interlocked_unlock ();
1737 return InterlockedExchange64 (location, value);
1741 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1743 LongDoubleUnion val, ret;
1746 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1751 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1753 return InterlockedCompareExchange(location, value, comparand);
1756 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1759 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1760 mono_gc_wbarrier_generic_nostore (location);
1764 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1766 return InterlockedCompareExchangePointer(location, value, comparand);
1769 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1771 IntFloatUnion val, ret, cmp;
1774 cmp.fval = comparand;
1775 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1781 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1783 #if SIZEOF_VOID_P == 8
1784 LongDoubleUnion val, comp, ret;
1787 comp.fval = comparand;
1788 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1794 mono_interlocked_lock ();
1796 if (old == comparand)
1798 mono_interlocked_unlock ();
1805 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1807 #if SIZEOF_VOID_P == 4
1808 if (G_UNLIKELY ((size_t)location & 0x7)) {
1810 mono_interlocked_lock ();
1812 if (old == comparand)
1814 mono_interlocked_unlock ();
1818 return InterlockedCompareExchange64 (location, value, comparand);
1822 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1825 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1826 mono_gc_wbarrier_generic_nostore (location);
1831 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1834 res = InterlockedExchangePointer ((gpointer *)location, value);
1835 mono_gc_wbarrier_generic_nostore (location);
1840 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1842 return InterlockedAdd (location, value);
1846 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1848 #if SIZEOF_VOID_P == 4
1849 if (G_UNLIKELY ((size_t)location & 0x7)) {
1851 mono_interlocked_lock ();
1854 mono_interlocked_unlock ();
1858 return InterlockedAdd64 (location, value);
1862 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1864 #if SIZEOF_VOID_P == 4
1865 if (G_UNLIKELY ((size_t)location & 0x7)) {
1867 mono_interlocked_lock ();
1869 mono_interlocked_unlock ();
1873 return InterlockedRead64 (location);
1877 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1879 mono_memory_barrier ();
1883 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1885 mono_thread_clr_state (this, state);
1887 if (state & ThreadState_Background) {
1888 /* If the thread changes the background mode, the main thread has to
1889 * be notified, since it has to rebuild the list of threads to
1892 SetEvent (background_change_event);
1897 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1899 mono_thread_set_state (this, state);
1901 if (state & ThreadState_Background) {
1902 /* If the thread changes the background mode, the main thread has to
1903 * be notified, since it has to rebuild the list of threads to
1906 SetEvent (background_change_event);
1911 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1917 state = this->state;
1919 UNLOCK_THREAD (this);
1924 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1926 MonoInternalThread *current;
1931 current = mono_thread_internal_current ();
1933 this->thread_interrupt_requested = TRUE;
1934 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1936 UNLOCK_THREAD (this);
1939 abort_thread_internal (this, TRUE, FALSE);
1943 void mono_thread_current_check_pending_interrupt ()
1945 MonoInternalThread *thread = mono_thread_internal_current ();
1946 gboolean throw = FALSE;
1948 LOCK_THREAD (thread);
1950 if (thread->thread_interrupt_requested) {
1952 thread->thread_interrupt_requested = FALSE;
1955 UNLOCK_THREAD (thread);
1958 mono_raise_exception (mono_get_exception_thread_interrupted ());
1963 mono_thread_get_abort_signal (void)
1967 #elif defined(PLATFORM_ANDROID)
1969 #elif !defined (SIGRTMIN)
1974 #endif /* SIGUSR1 */
1976 static int abort_signum = -1;
1978 if (abort_signum != -1)
1979 return abort_signum;
1980 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1981 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1982 struct sigaction sinfo;
1983 sigaction (i, NULL, &sinfo);
1984 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
1989 /* fallback to the old way */
1991 #endif /* HOST_WIN32 */
1995 static void CALLBACK interruption_request_apc (ULONG_PTR param)
1997 MonoException* exc = mono_thread_request_interruption (FALSE);
1998 if (exc) mono_raise_exception (exc);
2000 #endif /* HOST_WIN32 */
2003 * signal_thread_state_change
2005 * Tells the thread that his state has changed and it has to enter the new
2006 * state as soon as possible.
2008 static void signal_thread_state_change (MonoInternalThread *thread)
2011 gpointer wait_handle;
2014 if (thread == mono_thread_internal_current ()) {
2015 /* Do it synchronously */
2016 MonoException *exc = mono_thread_request_interruption (FALSE);
2018 mono_raise_exception (exc);
2022 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, (ULONG_PTR)NULL);
2025 * This will cause waits to be broken.
2026 * It will also prevent the thread from entering a wait, so if the thread returns
2027 * from the wait before it receives the abort signal, it will just spin in the wait
2028 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2031 wait_handle = wapi_prepare_interrupt_thread (thread->handle);
2033 /* fixme: store the state somewhere */
2034 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2036 wapi_finish_interrupt_thread (wait_handle);
2037 #endif /* HOST_WIN32 */
2041 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2043 LOCK_THREAD (thread);
2045 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2046 (thread->state & ThreadState_StopRequested) != 0 ||
2047 (thread->state & ThreadState_Stopped) != 0)
2049 UNLOCK_THREAD (thread);
2053 if ((thread->state & ThreadState_Unstarted) != 0) {
2054 thread->state |= ThreadState_Aborted;
2055 UNLOCK_THREAD (thread);
2059 thread->state |= ThreadState_AbortRequested;
2060 if (thread->abort_state_handle)
2061 mono_gchandle_free (thread->abort_state_handle);
2063 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2064 g_assert (thread->abort_state_handle);
2066 thread->abort_state_handle = 0;
2068 thread->abort_exc = NULL;
2071 * abort_exc is set in mono_thread_execute_interruption(),
2072 * triggered by the call to signal_thread_state_change(),
2073 * below. There's a point between where we have
2074 * abort_state_handle set, but abort_exc NULL, but that's not
2078 UNLOCK_THREAD (thread);
2080 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2082 /* During shutdown, we can't wait for other threads */
2084 /* Make sure the thread is awake */
2085 mono_thread_resume (thread);
2087 abort_thread_internal (thread, TRUE, TRUE);
2091 ves_icall_System_Threading_Thread_ResetAbort (void)
2093 MonoInternalThread *thread = mono_thread_internal_current ();
2094 gboolean was_aborting;
2096 LOCK_THREAD (thread);
2097 was_aborting = thread->state & ThreadState_AbortRequested;
2098 thread->state &= ~ThreadState_AbortRequested;
2099 UNLOCK_THREAD (thread);
2101 if (!was_aborting) {
2102 const char *msg = "Unable to reset abort because no abort was requested";
2103 mono_raise_exception (mono_get_exception_thread_state (msg));
2105 thread->abort_exc = NULL;
2106 if (thread->abort_state_handle) {
2107 mono_gchandle_free (thread->abort_state_handle);
2108 /* This is actually not necessary - the handle
2109 only counts if the exception is set */
2110 thread->abort_state_handle = 0;
2115 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2117 LOCK_THREAD (thread);
2119 thread->state &= ~ThreadState_AbortRequested;
2121 if (thread->abort_exc) {
2122 thread->abort_exc = NULL;
2123 if (thread->abort_state_handle) {
2124 mono_gchandle_free (thread->abort_state_handle);
2125 /* This is actually not necessary - the handle
2126 only counts if the exception is set */
2127 thread->abort_state_handle = 0;
2131 UNLOCK_THREAD (thread);
2135 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2137 MonoInternalThread *thread = this->internal_thread;
2138 MonoObject *state, *deserialized = NULL, *exc;
2141 if (!thread->abort_state_handle)
2144 state = mono_gchandle_get_target (thread->abort_state_handle);
2147 domain = mono_domain_get ();
2148 if (mono_object_domain (state) == domain)
2151 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2153 if (!deserialized) {
2154 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2156 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2157 mono_raise_exception (invalid_op_exc);
2160 return deserialized;
2164 mono_thread_suspend (MonoInternalThread *thread)
2166 LOCK_THREAD (thread);
2168 if ((thread->state & ThreadState_Unstarted) != 0 ||
2169 (thread->state & ThreadState_Aborted) != 0 ||
2170 (thread->state & ThreadState_Stopped) != 0)
2172 UNLOCK_THREAD (thread);
2176 if ((thread->state & ThreadState_Suspended) != 0 ||
2177 (thread->state & ThreadState_SuspendRequested) != 0 ||
2178 (thread->state & ThreadState_StopRequested) != 0)
2180 UNLOCK_THREAD (thread);
2184 thread->state |= ThreadState_SuspendRequested;
2186 UNLOCK_THREAD (thread);
2188 suspend_thread_internal (thread, FALSE);
2193 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2195 if (!mono_thread_suspend (thread))
2196 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2200 mono_thread_resume (MonoInternalThread *thread)
2202 LOCK_THREAD (thread);
2204 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2205 thread->state &= ~ThreadState_SuspendRequested;
2206 UNLOCK_THREAD (thread);
2210 if ((thread->state & ThreadState_Suspended) == 0 ||
2211 (thread->state & ThreadState_Unstarted) != 0 ||
2212 (thread->state & ThreadState_Aborted) != 0 ||
2213 (thread->state & ThreadState_Stopped) != 0)
2215 UNLOCK_THREAD (thread);
2219 return resume_thread_internal (thread);
2223 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2225 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2226 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2230 mono_threads_is_critical_method (MonoMethod *method)
2232 switch (method->wrapper_type) {
2233 case MONO_WRAPPER_RUNTIME_INVOKE:
2234 case MONO_WRAPPER_XDOMAIN_INVOKE:
2235 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2242 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2247 if (mono_threads_is_critical_method (m)) {
2248 *((gboolean*)data) = TRUE;
2255 is_running_protected_wrapper (void)
2257 gboolean found = FALSE;
2258 mono_stack_walk (find_wrapper, &found);
2262 void mono_thread_internal_stop (MonoInternalThread *thread)
2264 LOCK_THREAD (thread);
2266 if ((thread->state & ThreadState_StopRequested) != 0 ||
2267 (thread->state & ThreadState_Stopped) != 0)
2269 UNLOCK_THREAD (thread);
2273 /* Make sure the thread is awake */
2274 mono_thread_resume (thread);
2276 thread->state |= ThreadState_StopRequested;
2277 thread->state &= ~ThreadState_AbortRequested;
2279 UNLOCK_THREAD (thread);
2281 abort_thread_internal (thread, TRUE, TRUE);
2284 void mono_thread_stop (MonoThread *thread)
2286 mono_thread_internal_stop (thread->internal_thread);
2290 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2293 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2298 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2301 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2306 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2309 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2314 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2317 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2322 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2325 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2326 return (void *) tmp;
2330 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2332 volatile MonoObject *tmp;
2333 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2334 return (MonoObject *) tmp;
2338 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2341 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2346 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2349 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2354 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2356 return InterlockedRead8 (ptr);
2360 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2362 return InterlockedRead16 (ptr);
2366 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2368 return InterlockedRead (ptr);
2372 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2374 #if SIZEOF_VOID_P == 4
2375 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2377 mono_interlocked_lock ();
2378 val = *(gint64*)ptr;
2379 mono_interlocked_unlock ();
2383 return InterlockedRead64 (ptr);
2387 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2389 return InterlockedReadPointer (ptr);
2393 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2397 #if SIZEOF_VOID_P == 4
2398 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2400 mono_interlocked_lock ();
2401 val = *(double*)ptr;
2402 mono_interlocked_unlock ();
2407 u.ival = InterlockedRead64 (ptr);
2413 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2417 u.ival = InterlockedRead (ptr);
2423 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2425 return InterlockedReadPointer (ptr);
2429 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2431 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2435 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2437 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2441 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2443 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2447 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2449 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2453 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2455 mono_atomic_store_release ((volatile void **) ptr, value);
2459 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2461 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2465 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2467 mono_atomic_store_release ((volatile double *) ptr, value);
2471 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2473 mono_atomic_store_release ((volatile float *) ptr, value);
2477 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2479 InterlockedWrite8 (ptr, value);
2483 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2485 InterlockedWrite16 (ptr, value);
2489 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2491 InterlockedWrite (ptr, value);
2495 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2497 #if SIZEOF_VOID_P == 4
2498 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2499 mono_interlocked_lock ();
2500 *(gint64*)ptr = value;
2501 mono_interlocked_unlock ();
2506 InterlockedWrite64 (ptr, value);
2510 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2512 InterlockedWritePointer (ptr, value);
2516 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2520 #if SIZEOF_VOID_P == 4
2521 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2522 mono_interlocked_lock ();
2523 *(double*)ptr = value;
2524 mono_interlocked_unlock ();
2531 InterlockedWrite64 (ptr, u.ival);
2535 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2541 InterlockedWrite (ptr, u.ival);
2545 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2547 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2551 mono_thread_init_tls (void)
2553 MONO_FAST_TLS_INIT (tls_current_object);
2554 mono_native_tls_alloc (¤t_object_key, NULL);
2557 void mono_thread_init (MonoThreadStartCB start_cb,
2558 MonoThreadAttachCB attach_cb)
2560 mono_mutex_init_recursive(&threads_mutex);
2561 mono_mutex_init_recursive(&interlocked_mutex);
2562 mono_mutex_init_recursive(&contexts_mutex);
2563 mono_mutex_init_recursive(&joinable_threads_mutex);
2565 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2566 g_assert(background_change_event != NULL);
2568 mono_init_static_data_info (&thread_static_info);
2569 mono_init_static_data_info (&context_static_info);
2571 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2573 mono_thread_start_cb = start_cb;
2574 mono_thread_attach_cb = attach_cb;
2576 /* Get a pseudo handle to the current process. This is just a
2577 * kludge so that wapi can build a process handle if needed.
2578 * As a pseudo handle is returned, we don't need to clean
2581 GetCurrentProcess ();
2584 void mono_thread_cleanup (void)
2586 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2587 MonoThreadInfo *info;
2589 /* The main thread must abandon any held mutexes (particularly
2590 * important for named mutexes as they are shared across
2591 * processes, see bug 74680.) This will happen when the
2592 * thread exits, but if it's not running in a subthread it
2593 * won't exit in time.
2595 info = mono_thread_info_current ();
2596 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2600 /* This stuff needs more testing, it seems one of these
2601 * critical sections can be locked when mono_thread_cleanup is
2604 mono_mutex_destroy (&threads_mutex);
2605 mono_mutex_destroy (&interlocked_mutex);
2606 mono_mutex_destroy (&contexts_mutex);
2607 mono_mutex_destroy (&delayed_free_table_mutex);
2608 mono_mutex_destroy (&small_id_mutex);
2609 CloseHandle (background_change_event);
2612 mono_native_tls_free (current_object_key);
2616 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2618 mono_thread_cleanup_fn = func;
2622 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2624 thread->internal_thread->manage_callback = func;
2627 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2629 mono_thread_notify_pending_exc_fn = func;
2633 static void print_tids (gpointer key, gpointer value, gpointer user)
2635 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2636 * sizeof(uint) and a cast to uint would overflow
2638 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2639 * print this as a pointer.
2641 g_message ("Waiting for: %p", key);
2646 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2647 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2651 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2655 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2657 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2659 if(ret==WAIT_FAILED) {
2660 /* See the comment in build_wait_tids() */
2661 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2665 for(i=0; i<wait->num; i++)
2666 CloseHandle (wait->handles[i]);
2668 if (ret == WAIT_TIMEOUT)
2671 for(i=0; i<wait->num; i++) {
2672 gsize tid = wait->threads[i]->tid;
2675 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2676 * it can still run io-layer etc. code. So wait for it to really exit.
2677 * FIXME: This won't join threads which are not in the joinable_hash yet.
2679 mono_thread_join ((gpointer)tid);
2681 mono_threads_lock ();
2682 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2683 /* This thread must have been killed, because
2684 * it hasn't cleaned itself up. (It's just
2685 * possible that the thread exited before the
2686 * parent thread had a chance to store the
2687 * handle, and now there is another pointer to
2688 * the already-exited thread stored. In this
2689 * case, we'll just get two
2690 * mono_profiler_thread_end() calls for the
2694 mono_threads_unlock ();
2695 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2696 thread_cleanup (wait->threads[i]);
2698 mono_threads_unlock ();
2703 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2705 guint32 i, ret, count;
2707 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2709 /* Add the thread state change event, so it wakes up if a thread changes
2710 * to background mode.
2713 if (count < MAXIMUM_WAIT_OBJECTS) {
2714 wait->handles [count] = background_change_event;
2718 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2720 if(ret==WAIT_FAILED) {
2721 /* See the comment in build_wait_tids() */
2722 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2726 for(i=0; i<wait->num; i++)
2727 CloseHandle (wait->handles[i]);
2729 if (ret == WAIT_TIMEOUT)
2732 if (ret < wait->num) {
2733 gsize tid = wait->threads[ret]->tid;
2734 mono_threads_lock ();
2735 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2736 /* See comment in wait_for_tids about thread cleanup */
2737 mono_threads_unlock ();
2738 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2739 thread_cleanup (wait->threads [ret]);
2741 mono_threads_unlock ();
2745 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2747 struct wait_data *wait=(struct wait_data *)user;
2749 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2751 MonoInternalThread *thread=(MonoInternalThread *)value;
2753 /* Ignore background threads, we abort them later */
2754 /* Do not lock here since it is not needed and the caller holds threads_lock */
2755 if (thread->state & ThreadState_Background) {
2756 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2757 return; /* just leave, ignore */
2760 if (mono_gc_is_finalizer_internal_thread (thread)) {
2761 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2765 if (thread == mono_thread_internal_current ()) {
2766 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2770 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2771 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2775 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2776 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2780 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2781 if (handle == NULL) {
2782 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2786 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2787 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2788 wait->handles[wait->num]=handle;
2789 wait->threads[wait->num]=thread;
2792 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2794 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2799 /* Just ignore the rest, we can't do anything with
2806 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2808 struct wait_data *wait=(struct wait_data *)user;
2809 gsize self = GetCurrentThreadId ();
2810 MonoInternalThread *thread = value;
2813 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2816 /* The finalizer thread is not a background thread */
2817 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2818 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2820 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2824 /* printf ("A: %d\n", wait->num); */
2825 wait->handles[wait->num]=thread->handle;
2826 wait->threads[wait->num]=thread;
2829 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2830 mono_thread_internal_stop (thread);
2834 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2838 * mono_threads_set_shutting_down:
2840 * Is called by a thread that wants to shut down Mono. If the runtime is already
2841 * shutting down, the calling thread is suspended/stopped, and this function never
2845 mono_threads_set_shutting_down (void)
2847 MonoInternalThread *current_thread = mono_thread_internal_current ();
2849 mono_threads_lock ();
2851 if (shutting_down) {
2852 mono_threads_unlock ();
2854 /* Make sure we're properly suspended/stopped */
2856 LOCK_THREAD (current_thread);
2858 if ((current_thread->state & ThreadState_SuspendRequested) ||
2859 (current_thread->state & ThreadState_AbortRequested) ||
2860 (current_thread->state & ThreadState_StopRequested)) {
2861 UNLOCK_THREAD (current_thread);
2862 mono_thread_execute_interruption (current_thread);
2864 current_thread->state |= ThreadState_Stopped;
2865 UNLOCK_THREAD (current_thread);
2868 /*since we're killing the thread, unset the current domain.*/
2869 mono_domain_unset ();
2871 /* Wake up other threads potentially waiting for us */
2872 mono_thread_info_exit ();
2874 shutting_down = TRUE;
2876 /* Not really a background state change, but this will
2877 * interrupt the main thread if it is waiting for all
2878 * the other threads.
2880 SetEvent (background_change_event);
2882 mono_threads_unlock ();
2886 void mono_thread_manage (void)
2888 struct wait_data wait_data;
2889 struct wait_data *wait = &wait_data;
2891 memset (wait, 0, sizeof (struct wait_data));
2892 /* join each thread that's still running */
2893 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2895 mono_threads_lock ();
2897 THREAD_DEBUG (g_message("%s: No threads", __func__));
2898 mono_threads_unlock ();
2901 mono_threads_unlock ();
2904 mono_threads_lock ();
2905 if (shutting_down) {
2906 /* somebody else is shutting down */
2907 mono_threads_unlock ();
2910 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2911 mono_g_hash_table_foreach (threads, print_tids, NULL));
2913 ResetEvent (background_change_event);
2915 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2916 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2917 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2918 mono_threads_unlock ();
2920 /* Something to wait for */
2921 wait_for_tids_or_state_change (wait, INFINITE);
2923 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2924 } while(wait->num>0);
2926 /* Mono is shutting down, so just wait for the end */
2927 if (!mono_runtime_try_shutdown ()) {
2928 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2929 mono_thread_suspend (mono_thread_internal_current ());
2930 mono_thread_execute_interruption (mono_thread_internal_current ());
2934 * Remove everything but the finalizer thread and self.
2935 * Also abort all the background threads
2938 mono_threads_lock ();
2941 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2942 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2943 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2945 mono_threads_unlock ();
2947 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2949 /* Something to wait for */
2950 wait_for_tids (wait, INFINITE);
2952 } while (wait->num > 0);
2955 * give the subthreads a chance to really quit (this is mainly needed
2956 * to get correct user and system times from getrusage/wait/time(1)).
2957 * This could be removed if we avoid pthread_detach() and use pthread_join().
2960 mono_thread_info_yield ();
2964 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2966 MonoInternalThread *thread=(MonoInternalThread *)value;
2968 if(thread->tid != (gsize)user) {
2969 /*TerminateThread (thread->handle, -1);*/
2973 void mono_thread_abort_all_other_threads (void)
2975 gsize self = GetCurrentThreadId ();
2977 mono_threads_lock ();
2978 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2979 mono_g_hash_table_size (threads));
2980 mono_g_hash_table_foreach (threads, print_tids, NULL));
2982 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2984 mono_threads_unlock ();
2988 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2990 MonoInternalThread *thread = (MonoInternalThread*)value;
2991 struct wait_data *wait = (struct wait_data*)user_data;
2995 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2997 * This needs no locking.
2999 if ((thread->state & ThreadState_Suspended) != 0 ||
3000 (thread->state & ThreadState_Stopped) != 0)
3003 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3004 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3008 wait->handles [wait->num] = handle;
3009 wait->threads [wait->num] = thread;
3015 * mono_thread_suspend_all_other_threads:
3017 * Suspend all managed threads except the finalizer thread and this thread. It is
3018 * not possible to resume them later.
3020 void mono_thread_suspend_all_other_threads (void)
3022 struct wait_data wait_data;
3023 struct wait_data *wait = &wait_data;
3025 gsize self = GetCurrentThreadId ();
3027 guint32 eventidx = 0;
3028 gboolean starting, finished;
3030 memset (wait, 0, sizeof (struct wait_data));
3032 * The other threads could be in an arbitrary state at this point, i.e.
3033 * they could be starting up, shutting down etc. This means that there could be
3034 * threads which are not even in the threads hash table yet.
3038 * First we set a barrier which will be checked by all threads before they
3039 * are added to the threads hash table, and they will exit if the flag is set.
3040 * This ensures that no threads could be added to the hash later.
3041 * We will use shutting_down as the barrier for now.
3043 g_assert (shutting_down);
3046 * We make multiple calls to WaitForMultipleObjects since:
3047 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3048 * - some threads could exit without becoming suspended
3053 * Make a copy of the hashtable since we can't do anything with
3054 * threads while threads_mutex is held.
3057 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3058 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3059 mono_threads_lock ();
3060 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3061 mono_threads_unlock ();
3063 events = g_new0 (gpointer, wait->num);
3065 /* Get the suspended events that we'll be waiting for */
3066 for (i = 0; i < wait->num; ++i) {
3067 MonoInternalThread *thread = wait->threads [i];
3068 gboolean signal_suspend = FALSE;
3070 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3071 //CloseHandle (wait->handles [i]);
3072 wait->threads [i] = NULL; /* ignore this thread in next loop */
3076 LOCK_THREAD (thread);
3078 if (thread->suspended_event == NULL) {
3079 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3080 if (thread->suspended_event == NULL) {
3081 /* Forget this one and go on to the next */
3082 UNLOCK_THREAD (thread);
3087 if ((thread->state & ThreadState_Suspended) != 0 ||
3088 (thread->state & ThreadState_StopRequested) != 0 ||
3089 (thread->state & ThreadState_Stopped) != 0) {
3090 UNLOCK_THREAD (thread);
3091 CloseHandle (wait->handles [i]);
3092 wait->threads [i] = NULL; /* ignore this thread in next loop */
3096 if ((thread->state & ThreadState_SuspendRequested) == 0)
3097 signal_suspend = TRUE;
3099 events [eventidx++] = thread->suspended_event;
3101 /* Convert abort requests into suspend requests */
3102 if ((thread->state & ThreadState_AbortRequested) != 0)
3103 thread->state &= ~ThreadState_AbortRequested;
3105 thread->state |= ThreadState_SuspendRequested;
3107 UNLOCK_THREAD (thread);
3109 /* Signal the thread to suspend */
3110 if (mono_thread_info_new_interrupt_enabled ())
3111 suspend_thread_internal (thread, TRUE);
3112 else if (signal_suspend)
3113 signal_thread_state_change (thread);
3116 /*Only wait on the suspend event if we are using the old path */
3117 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3118 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3119 for (i = 0; i < wait->num; ++i) {
3120 MonoInternalThread *thread = wait->threads [i];
3125 LOCK_THREAD (thread);
3126 if ((thread->state & ThreadState_Suspended) != 0) {
3127 CloseHandle (thread->suspended_event);
3128 thread->suspended_event = NULL;
3130 UNLOCK_THREAD (thread);
3134 if (eventidx <= 0) {
3136 * If there are threads which are starting up, we wait until they
3137 * are suspended when they try to register in the threads hash.
3138 * This is guaranteed to finish, since the threads which can create new
3139 * threads get suspended after a while.
3140 * FIXME: The finalizer thread can still create new threads.
3142 mono_threads_lock ();
3143 if (threads_starting_up)
3144 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3147 mono_threads_unlock ();
3159 collect_threads (gpointer key, gpointer value, gpointer user_data)
3161 MonoInternalThread *thread = (MonoInternalThread*)value;
3162 struct wait_data *wait = (struct wait_data*)user_data;
3165 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3166 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3170 wait->handles [wait->num] = handle;
3171 wait->threads [wait->num] = thread;
3176 static gboolean thread_dump_requested;
3178 static G_GNUC_UNUSED gboolean
3179 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3181 GString *p = (GString*)data;
3182 MonoMethod *method = NULL;
3184 method = mono_jit_info_get_method (frame->ji);
3187 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3188 g_string_append_printf (p, " %s\n", location);
3191 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3197 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3199 GString* text = g_string_new (0);
3201 GError *error = NULL;
3204 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3206 g_string_append_printf (text, "\n\"%s\"", name);
3209 else if (thread->threadpool_thread)
3210 g_string_append (text, "\n\"<threadpool thread>\"");
3212 g_string_append (text, "\n\"<unnamed thread>\"");
3215 /* This no longer works with remote unwinding */
3217 wapi_desc = wapi_current_thread_desc ();
3218 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3223 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3224 mono_thread_info_finish_suspend_and_resume (info);
3226 fprintf (stdout, "%s", text->str);
3228 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3229 OutputDebugStringA(text->str);
3232 g_string_free (text, TRUE);
3237 dump_thread (gpointer key, gpointer value, gpointer user)
3239 MonoInternalThread *thread = (MonoInternalThread *)value;
3240 MonoThreadInfo *info;
3242 if (thread == mono_thread_internal_current ())
3246 FIXME This still can hang if we stop a thread during malloc.
3247 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3248 that takes a callback and runs it with the target suspended.
3249 We probably should loop a bit around trying to get it to either managed code
3252 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3257 print_thread_dump (thread, info);
3261 mono_threads_perform_thread_dump (void)
3263 if (!thread_dump_requested)
3266 printf ("Full thread dump:\n");
3269 * Make a copy of the hashtable since we can't do anything with
3270 * threads while threads_mutex is held.
3272 mono_threads_lock ();
3273 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3274 mono_threads_unlock ();
3276 thread_dump_requested = FALSE;
3280 * mono_threads_request_thread_dump:
3282 * Ask all threads except the current to print their stacktrace to stdout.
3285 mono_threads_request_thread_dump (void)
3287 struct wait_data wait_data;
3288 struct wait_data *wait = &wait_data;
3291 /*The new thread dump code runs out of the finalizer thread. */
3292 if (mono_thread_info_new_interrupt_enabled ()) {
3293 thread_dump_requested = TRUE;
3294 mono_gc_finalize_notify ();
3299 memset (wait, 0, sizeof (struct wait_data));
3302 * Make a copy of the hashtable since we can't do anything with
3303 * threads while threads_mutex is held.
3305 mono_threads_lock ();
3306 mono_g_hash_table_foreach (threads, collect_threads, wait);
3307 mono_threads_unlock ();
3309 for (i = 0; i < wait->num; ++i) {
3310 MonoInternalThread *thread = wait->threads [i];
3312 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3313 (thread != mono_thread_internal_current ()) &&
3314 !thread->thread_dump_requested) {
3315 thread->thread_dump_requested = TRUE;
3317 signal_thread_state_change (thread);
3320 CloseHandle (wait->handles [i]);
3326 gint allocated; /* +1 so that refs [allocated] == NULL */
3330 typedef struct ref_stack RefStack;
3333 ref_stack_new (gint initial_size)
3337 initial_size = MAX (initial_size, 16) + 1;
3338 rs = g_new0 (RefStack, 1);
3339 rs->refs = g_new0 (gpointer, initial_size);
3340 rs->allocated = initial_size;
3345 ref_stack_destroy (gpointer ptr)
3356 ref_stack_push (RefStack *rs, gpointer ptr)
3358 g_assert (rs != NULL);
3360 if (rs->bottom >= rs->allocated) {
3361 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3362 rs->allocated <<= 1;
3363 rs->refs [rs->allocated] = NULL;
3365 rs->refs [rs->bottom++] = ptr;
3369 ref_stack_pop (RefStack *rs)
3371 if (rs == NULL || rs->bottom == 0)
3375 rs->refs [rs->bottom] = NULL;
3379 ref_stack_find (RefStack *rs, gpointer ptr)
3386 for (refs = rs->refs; refs && *refs; refs++) {
3394 * mono_thread_push_appdomain_ref:
3396 * Register that the current thread may have references to objects in domain
3397 * @domain on its stack. Each call to this function should be paired with a
3398 * call to pop_appdomain_ref.
3401 mono_thread_push_appdomain_ref (MonoDomain *domain)
3403 MonoInternalThread *thread = mono_thread_internal_current ();
3406 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3407 SPIN_LOCK (thread->lock_thread_id);
3408 if (thread->appdomain_refs == NULL)
3409 thread->appdomain_refs = ref_stack_new (16);
3410 ref_stack_push (thread->appdomain_refs, domain);
3411 SPIN_UNLOCK (thread->lock_thread_id);
3416 mono_thread_pop_appdomain_ref (void)
3418 MonoInternalThread *thread = mono_thread_internal_current ();
3421 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3422 SPIN_LOCK (thread->lock_thread_id);
3423 ref_stack_pop (thread->appdomain_refs);
3424 SPIN_UNLOCK (thread->lock_thread_id);
3429 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3432 SPIN_LOCK (thread->lock_thread_id);
3433 res = ref_stack_find (thread->appdomain_refs, domain);
3434 SPIN_UNLOCK (thread->lock_thread_id);
3439 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3441 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3444 typedef struct abort_appdomain_data {
3445 struct wait_data wait;
3447 } abort_appdomain_data;
3450 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3452 MonoInternalThread *thread = (MonoInternalThread*)value;
3453 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3454 MonoDomain *domain = data->domain;
3456 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3457 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3459 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3460 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3463 data->wait.handles [data->wait.num] = handle;
3464 data->wait.threads [data->wait.num] = thread;
3467 /* Just ignore the rest, we can't do anything with
3475 * mono_threads_abort_appdomain_threads:
3477 * Abort threads which has references to the given appdomain.
3480 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3482 #ifdef __native_client__
3486 abort_appdomain_data user_data;
3488 int orig_timeout = timeout;
3491 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3493 start_time = mono_msec_ticks ();
3495 mono_threads_lock ();
3497 user_data.domain = domain;
3498 user_data.wait.num = 0;
3499 /* This shouldn't take any locks */
3500 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3501 mono_threads_unlock ();
3503 if (user_data.wait.num > 0) {
3504 /* Abort the threads outside the threads lock */
3505 for (i = 0; i < user_data.wait.num; ++i)
3506 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3509 * We should wait for the threads either to abort, or to leave the
3510 * domain. We can't do the latter, so we wait with a timeout.
3512 wait_for_tids (&user_data.wait, 100);
3515 /* Update remaining time */
3516 timeout -= mono_msec_ticks () - start_time;
3517 start_time = mono_msec_ticks ();
3519 if (orig_timeout != -1 && timeout < 0)
3522 while (user_data.wait.num > 0);
3524 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3530 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3532 MonoInternalThread *thread = (MonoInternalThread*)value;
3533 MonoDomain *domain = (MonoDomain*)user_data;
3536 /* No locking needed here */
3537 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3539 if (thread->cached_culture_info) {
3540 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3541 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3542 if (obj && obj->vtable->domain == domain)
3543 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3549 * mono_threads_clear_cached_culture:
3551 * Clear the cached_current_culture from all threads if it is in the
3555 mono_threads_clear_cached_culture (MonoDomain *domain)
3557 mono_threads_lock ();
3558 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3559 mono_threads_unlock ();
3563 * mono_thread_get_undeniable_exception:
3565 * Return an exception which needs to be raised when leaving a catch clause.
3566 * This is used for undeniable exception propagation.
3569 mono_thread_get_undeniable_exception (void)
3571 MonoInternalThread *thread = mono_thread_internal_current ();
3573 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3575 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3576 * exception if the thread no longer references a dying appdomain.
3578 thread->abort_exc->trace_ips = NULL;
3579 thread->abort_exc->stack_trace = NULL;
3580 return thread->abort_exc;
3586 #if MONO_SMALL_CONFIG
3587 #define NUM_STATIC_DATA_IDX 4
3588 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3592 #define NUM_STATIC_DATA_IDX 8
3593 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3594 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3598 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3601 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3604 gpointer *static_data = addr;
3605 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3608 if (!static_data [i])
3610 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3611 ptr = static_data [i];
3612 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3613 uintptr_t bmap = static_reference_bitmaps [i][j];
3616 if ((bmap & 1) && *p) {
3617 mark_func (p, gc_data);
3627 * mono_alloc_static_data
3629 * Allocate memory blocks for storing threads or context static data
3632 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3634 guint idx = (offset >> 24) - 1;
3637 gpointer* static_data = *static_data_ptr;
3639 static void* tls_desc = NULL;
3640 if (mono_gc_user_markers_supported () && !tls_desc)
3641 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3642 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3643 *static_data_ptr = static_data;
3644 static_data [0] = static_data;
3647 for (i = 1; i <= idx; ++i) {
3648 if (static_data [i])
3650 if (mono_gc_user_markers_supported () && threadlocal)
3651 static_data [i] = g_malloc0 (static_data_size [i]);
3653 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3658 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3661 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3662 gpointer p = static_data [i];
3666 * At this point, the static data pointer array is still registered with the
3667 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3668 * data. Freeing the individual arrays without first nulling their slots
3669 * would make it possible for mark_tls_slots() to encounter a pointer to
3670 * such an already freed array. See bug #13813.
3672 static_data [i] = NULL;
3673 mono_memory_write_barrier ();
3674 if (mono_gc_user_markers_supported () && threadlocal)
3677 mono_gc_free_fixed (p);
3679 mono_gc_free_fixed (static_data);
3683 * mono_init_static_data_info
3685 * Initializes static data counters
3687 static void mono_init_static_data_info (StaticDataInfo *static_data)
3689 static_data->idx = 0;
3690 static_data->offset = 0;
3691 static_data->freelist = NULL;
3695 * mono_alloc_static_data_slot
3697 * Generates an offset for static data. static_data contains the counters
3698 * used to generate it.
3701 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3705 if (!static_data->idx && !static_data->offset) {
3707 * we use the first chunk of the first allocation also as
3708 * an array for the rest of the data
3710 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3712 static_data->offset += align - 1;
3713 static_data->offset &= ~(align - 1);
3714 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3715 static_data->idx ++;
3716 g_assert (size <= static_data_size [static_data->idx]);
3717 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3718 static_data->offset = 0;
3720 offset = static_data->offset | ((static_data->idx + 1) << 24);
3721 static_data->offset += size;
3726 * ensure thread static fields already allocated are valid for thread
3727 * This function is called when a thread is created or on thread attach.
3730 thread_adjust_static_data (MonoInternalThread *thread)
3734 mono_threads_lock ();
3735 if (thread_static_info.offset || thread_static_info.idx > 0) {
3736 /* get the current allocated size */
3737 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3738 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3740 mono_threads_unlock ();
3744 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3746 MonoInternalThread *thread = value;
3747 guint32 offset = GPOINTER_TO_UINT (user);
3749 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3752 static MonoThreadDomainTls*
3753 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3755 MonoThreadDomainTls* prev = NULL;
3756 MonoThreadDomainTls* tmp = static_data->freelist;
3758 if (tmp->size == size) {
3760 prev->next = tmp->next;
3762 static_data->freelist = tmp->next;
3771 #if SIZEOF_VOID_P == 4
3778 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3781 int idx = (offset >> 24) - 1;
3783 if (!static_reference_bitmaps [idx])
3784 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3785 rb = static_reference_bitmaps [idx];
3787 offset /= sizeof (gpointer);
3788 /* offset is now the bitmap offset */
3789 for (i = 0; i < numbits; ++i) {
3790 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3791 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (ONE_P << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3796 clear_reference_bitmap (guint32 offset, guint32 size)
3798 int idx = (offset >> 24) - 1;
3800 rb = static_reference_bitmaps [idx];
3802 offset /= sizeof (gpointer);
3803 size /= sizeof (gpointer);
3805 /* offset is now the bitmap offset */
3806 for (; offset < size; ++offset)
3807 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3811 * The offset for a special static variable is composed of three parts:
3812 * a bit that indicates the type of static data (0:thread, 1:context),
3813 * an index in the array of chunks of memory for the thread (thread->static_data)
3814 * and an offset in that chunk of mem. This allows allocating less memory in the
3819 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3822 if (static_type == SPECIAL_STATIC_THREAD) {
3823 MonoThreadDomainTls *item;
3824 mono_threads_lock ();
3825 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3826 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3828 offset = item->offset;
3831 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3833 update_tls_reference_bitmap (offset, bitmap, numbits);
3834 /* This can be called during startup */
3835 if (threads != NULL)
3836 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3837 mono_threads_unlock ();
3839 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3840 mono_contexts_lock ();
3841 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3842 mono_contexts_unlock ();
3843 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3849 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3851 /* The high bit means either thread (0) or static (1) data. */
3853 guint32 static_type = (offset & 0x80000000);
3856 offset &= 0x7fffffff;
3857 idx = (offset >> 24) - 1;
3859 if (static_type == 0) {
3860 return get_thread_static_data (thread, offset);
3862 /* Allocate static data block under demand, since we don't have a list
3865 MonoAppContext *context = mono_context_get ();
3866 if (!context->static_data || !context->static_data [idx]) {
3867 mono_contexts_lock ();
3868 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3869 mono_contexts_unlock ();
3871 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3876 mono_get_special_static_data (guint32 offset)
3878 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3887 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3889 MonoInternalThread *thread = value;
3890 TlsOffsetSize *data = user;
3891 int idx = (data->offset >> 24) - 1;
3894 if (!thread->static_data || !thread->static_data [idx])
3896 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3897 mono_gc_bzero_atomic (ptr, data->size);
3901 do_free_special_slot (guint32 offset, guint32 size)
3903 guint32 static_type = (offset & 0x80000000);
3904 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3905 if (static_type == 0) {
3907 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3908 data.offset = offset & 0x7fffffff;
3910 clear_reference_bitmap (data.offset, data.size);
3911 if (threads != NULL)
3912 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3913 item->offset = offset;
3916 if (!mono_runtime_is_shutting_down ()) {
3917 item->next = thread_static_info.freelist;
3918 thread_static_info.freelist = item;
3920 /* We could be called during shutdown after mono_thread_cleanup () is called */
3924 /* FIXME: free context static data as well */
3929 do_free_special (gpointer key, gpointer value, gpointer data)
3931 MonoClassField *field = key;
3932 guint32 offset = GPOINTER_TO_UINT (value);
3935 size = mono_type_size (field->type, &align);
3936 do_free_special_slot (offset, size);
3940 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3942 mono_threads_lock ();
3943 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3944 mono_threads_unlock ();
3948 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3950 mono_threads_lock ();
3951 do_free_special_slot (offset, size);
3952 mono_threads_unlock ();
3956 * allocates room in the thread local area for storing an instance of the struct type
3957 * the allocation is kept track of in domain->tlsrec_list.
3960 mono_thread_alloc_tls (MonoReflectionType *type)
3962 MonoDomain *domain = mono_domain_get ();
3964 MonoTlsDataRecord *tlsrec;
3967 gsize default_bitmap [4] = {0};
3968 uint32_t tls_offset;
3972 klass = mono_class_from_mono_type (type->type);
3973 /* TlsDatum is a struct, so we subtract the object header size offset */
3974 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3975 size = mono_type_size (type->type, &align);
3976 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3977 if (bitmap != default_bitmap)
3979 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3980 tlsrec->tls_offset = tls_offset;
3981 tlsrec->size = size;
3982 mono_domain_lock (domain);
3983 tlsrec->next = domain->tlsrec_list;
3984 domain->tlsrec_list = tlsrec;
3985 mono_domain_unlock (domain);
3990 mono_thread_destroy_tls (uint32_t tls_offset)
3992 MonoTlsDataRecord *prev = NULL;
3993 MonoTlsDataRecord *cur;
3995 MonoDomain *domain = mono_domain_get ();
3996 mono_domain_lock (domain);
3997 cur = domain->tlsrec_list;
3999 if (cur->tls_offset == tls_offset) {
4001 prev->next = cur->next;
4003 domain->tlsrec_list = cur->next;
4011 mono_domain_unlock (domain);
4013 mono_special_static_data_free_slot (tls_offset, size);
4017 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4020 mono_thread_destroy_domain_tls (MonoDomain *domain)
4022 while (domain->tlsrec_list)
4023 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
4026 static MonoClassField *local_slots = NULL;
4029 /* local tls data to get locals_slot from a thread */
4032 /* index in the locals_slot array */
4037 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4039 LocalSlotID *sid = user_data;
4040 MonoInternalThread *thread = (MonoInternalThread*)value;
4041 MonoArray *slots_array;
4043 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4044 * it is for the right domain, so we need to check if it is allocated an initialized
4045 * for the current thread.
4047 /*g_print ("handling thread %p\n", thread);*/
4048 if (!thread->static_data || !thread->static_data [sid->idx])
4050 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4051 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4053 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4057 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4065 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4067 g_warning ("local_slots field not found in Thread class");
4071 domain = mono_domain_get ();
4072 mono_domain_lock (domain);
4073 if (domain->special_static_fields)
4074 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4075 mono_domain_unlock (domain);
4078 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4079 sid.offset = GPOINTER_TO_UINT (addr);
4080 sid.offset &= 0x7fffffff;
4081 sid.idx = (sid.offset >> 24) - 1;
4082 mono_threads_lock ();
4083 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4084 mono_threads_unlock ();
4086 /* FIXME: clear the slot for MonoAppContexts, too */
4091 static void CALLBACK dummy_apc (ULONG_PTR param)
4097 * mono_thread_execute_interruption
4099 * Performs the operation that the requested thread state requires (abort,
4102 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4104 LOCK_THREAD (thread);
4106 /* MonoThread::interruption_requested can only be changed with atomics */
4107 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4108 /* this will consume pending APC calls */
4110 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4112 InterlockedDecrement (&thread_interruption_requested);
4114 /* Clear the interrupted flag of the thread so it can wait again */
4115 wapi_clear_interruption ();
4119 if ((thread->state & ThreadState_AbortRequested) != 0) {
4120 UNLOCK_THREAD (thread);
4121 if (thread->abort_exc == NULL) {
4123 * This might be racy, but it has to be called outside the lock
4124 * since it calls managed code.
4126 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4128 return thread->abort_exc;
4130 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4131 self_suspend_internal (thread);
4134 else if ((thread->state & ThreadState_StopRequested) != 0) {
4135 /* FIXME: do this through the JIT? */
4137 UNLOCK_THREAD (thread);
4139 mono_thread_exit ();
4141 } else if (thread->pending_exception) {
4144 exc = thread->pending_exception;
4145 thread->pending_exception = NULL;
4147 UNLOCK_THREAD (thread);
4149 } else if (thread->thread_interrupt_requested) {
4151 thread->thread_interrupt_requested = FALSE;
4152 UNLOCK_THREAD (thread);
4154 return(mono_get_exception_thread_interrupted ());
4157 UNLOCK_THREAD (thread);
4163 * mono_thread_request_interruption
4165 * A signal handler can call this method to request the interruption of a
4166 * thread. The result of the interruption will depend on the current state of
4167 * the thread. If the result is an exception that needs to be throw, it is
4168 * provided as return value.
4171 mono_thread_request_interruption (gboolean running_managed)
4173 MonoInternalThread *thread = mono_thread_internal_current ();
4175 /* The thread may already be stopping */
4180 if (thread->interrupt_on_stop &&
4181 thread->state & ThreadState_StopRequested &&
4182 thread->state & ThreadState_Background)
4186 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4188 InterlockedIncrement (&thread_interruption_requested);
4190 if (!running_managed || is_running_protected_wrapper ()) {
4191 /* Can't stop while in unmanaged code. Increase the global interruption
4192 request count. When exiting the unmanaged method the count will be
4193 checked and the thread will be interrupted. */
4195 if (mono_thread_notify_pending_exc_fn && !running_managed)
4196 /* The JIT will notify the thread about the interruption */
4197 /* This shouldn't take any locks */
4198 mono_thread_notify_pending_exc_fn ();
4200 /* this will awake the thread if it is in WaitForSingleObject
4202 /* Our implementation of this function ignores the func argument */
4204 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4206 wapi_self_interrupt ();
4211 return mono_thread_execute_interruption (thread);
4215 /*This function should be called by a thread after it has exited all of
4216 * its handle blocks at interruption time.*/
4218 mono_thread_resume_interruption (void)
4220 MonoInternalThread *thread = mono_thread_internal_current ();
4221 gboolean still_aborting;
4223 /* The thread may already be stopping */
4227 LOCK_THREAD (thread);
4228 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4229 UNLOCK_THREAD (thread);
4231 /*This can happen if the protected block called Thread::ResetAbort*/
4232 if (!still_aborting)
4235 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4237 InterlockedIncrement (&thread_interruption_requested);
4240 wapi_self_interrupt ();
4242 return mono_thread_execute_interruption (thread);
4245 gboolean mono_thread_interruption_requested ()
4247 if (thread_interruption_requested) {
4248 MonoInternalThread *thread = mono_thread_internal_current ();
4249 /* The thread may already be stopping */
4251 return (thread->interruption_requested);
4256 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4258 MonoInternalThread *thread = mono_thread_internal_current ();
4260 /* The thread may already be stopping */
4264 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4265 MonoException* exc = mono_thread_execute_interruption (thread);
4266 if (exc) mono_raise_exception (exc);
4271 * Performs the interruption of the current thread, if one has been requested,
4272 * and the thread is not running a protected wrapper.
4274 void mono_thread_interruption_checkpoint ()
4276 mono_thread_interruption_checkpoint_request (FALSE);
4280 * Performs the interruption of the current thread, if one has been requested.
4282 void mono_thread_force_interruption_checkpoint ()
4284 mono_thread_interruption_checkpoint_request (TRUE);
4288 * mono_thread_get_and_clear_pending_exception:
4290 * Return any pending exceptions for the current thread and clear it as a side effect.
4293 mono_thread_get_and_clear_pending_exception (void)
4295 MonoInternalThread *thread = mono_thread_internal_current ();
4297 /* The thread may already be stopping */
4301 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4302 return mono_thread_execute_interruption (thread);
4305 if (thread->pending_exception) {
4306 MonoException *exc = thread->pending_exception;
4308 thread->pending_exception = NULL;
4316 * mono_set_pending_exception:
4318 * Set the pending exception of the current thread to EXC.
4319 * The exception will be thrown when execution returns to managed code.
4322 mono_set_pending_exception (MonoException *exc)
4324 MonoInternalThread *thread = mono_thread_internal_current ();
4326 /* The thread may already be stopping */
4330 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4332 mono_thread_request_interruption (FALSE);
4336 * mono_thread_interruption_request_flag:
4338 * Returns the address of a flag that will be non-zero if an interruption has
4339 * been requested for a thread. The thread to interrupt may not be the current
4340 * thread, so an additional call to mono_thread_interruption_requested() or
4341 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4344 gint32* mono_thread_interruption_request_flag ()
4346 return &thread_interruption_requested;
4350 mono_thread_init_apartment_state (void)
4353 MonoInternalThread* thread = mono_thread_internal_current ();
4355 /* Positive return value indicates success, either
4356 * S_OK if this is first CoInitialize call, or
4357 * S_FALSE if CoInitialize already called, but with same
4358 * threading model. A negative value indicates failure,
4359 * probably due to trying to change the threading model.
4361 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4362 ? COINIT_APARTMENTTHREADED
4363 : COINIT_MULTITHREADED) < 0) {
4364 thread->apartment_state = ThreadApartmentState_Unknown;
4370 mono_thread_cleanup_apartment_state (void)
4373 MonoInternalThread* thread = mono_thread_internal_current ();
4375 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4382 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4384 LOCK_THREAD (thread);
4385 thread->state |= state;
4386 UNLOCK_THREAD (thread);
4390 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4392 LOCK_THREAD (thread);
4393 thread->state &= ~state;
4394 UNLOCK_THREAD (thread);
4398 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4400 gboolean ret = FALSE;
4402 LOCK_THREAD (thread);
4404 if ((thread->state & test) != 0) {
4408 UNLOCK_THREAD (thread);
4413 //static MonoClassField *execution_context_field;
4416 get_execution_context_addr (void)
4418 MonoDomain *domain = mono_domain_get ();
4419 guint32 offset = domain->execution_context_field_offset;
4422 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4425 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4427 mono_domain_lock (domain);
4428 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4429 mono_domain_unlock (domain);
4432 domain->execution_context_field_offset = offset;
4435 return (MonoObject**) mono_get_special_static_data (offset);
4439 mono_thread_get_execution_context (void)
4441 return *get_execution_context_addr ();
4445 mono_thread_set_execution_context (MonoObject *ec)
4447 *get_execution_context_addr () = ec;
4450 static gboolean has_tls_get = FALSE;
4453 mono_runtime_set_has_tls_get (gboolean val)
4459 mono_runtime_has_tls_get (void)
4465 mono_thread_kill (MonoInternalThread *thread, int signal)
4467 #ifdef __native_client__
4468 /* Workaround pthread_kill abort() in NaCl glibc. */
4472 /* Win32 uses QueueUserAPC and callers of this are guarded */
4473 g_assert_not_reached ();
4475 # ifdef PTHREAD_POINTER_ID
4476 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4478 # ifdef PLATFORM_ANDROID
4479 if (thread->android_tid != 0) {
4481 int old_errno = errno;
4483 ret = tkill ((pid_t) thread->android_tid, signal);
4492 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4494 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4501 self_interrupt_thread (void *_unused)
4503 MonoThreadInfo *info = mono_thread_info_current ();
4504 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4505 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4506 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4507 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4511 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4515 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4519 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4521 MonoJitInfo **dest = data;
4527 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4529 MonoJitInfo *ji = NULL;
4532 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4537 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4540 MonoThreadInfo *info = NULL;
4541 gboolean protected_wrapper;
4542 gboolean running_managed;
4544 if (!mono_thread_info_new_interrupt_enabled ()) {
4545 signal_thread_state_change (thread);
4550 FIXME this is insanely broken, it doesn't cause interruption to happen
4551 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4553 if (thread == mono_thread_internal_current ()) {
4554 /* Do it synchronously */
4555 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4557 mono_raise_exception (exc);
4559 wapi_interrupt_thread (thread->handle);
4564 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4565 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4569 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4570 mono_thread_info_finish_suspend_and_resume (info);
4574 /*someone is already interrupting it*/
4575 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4576 mono_thread_info_finish_suspend_and_resume (info);
4579 InterlockedIncrement (&thread_interruption_requested);
4581 ji = mono_thread_info_get_last_managed (info);
4582 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4583 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4585 if (!protected_wrapper && running_managed) {
4586 /*We are in managed code*/
4587 /*Set the thread to call */
4588 if (install_async_abort)
4589 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4590 mono_thread_info_finish_suspend_and_resume (info);
4593 * This will cause waits to be broken.
4594 * It will also prevent the thread from entering a wait, so if the thread returns
4595 * from the wait before it receives the abort signal, it will just spin in the wait
4596 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4600 gpointer interrupt_handle;
4601 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4603 mono_thread_info_finish_suspend_and_resume (info);
4605 wapi_finish_interrupt_thread (interrupt_handle);
4608 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4612 transition_to_suspended (MonoInternalThread *thread, MonoThreadInfo *info)
4614 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4615 g_assert (0); /*FIXME we should not reach this */
4616 /*Make sure we balance the suspend count.*/
4618 mono_thread_info_finish_suspend_and_resume (info);
4620 thread->state &= ~ThreadState_SuspendRequested;
4621 thread->state |= ThreadState_Suspended;
4623 mono_thread_info_finish_suspend (info);
4625 UNLOCK_THREAD (thread);
4629 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4631 if (!mono_thread_info_new_interrupt_enabled ()) {
4632 signal_thread_state_change (thread);
4636 LOCK_THREAD (thread);
4637 if (thread == mono_thread_internal_current ()) {
4638 transition_to_suspended (thread, NULL);
4639 mono_thread_info_self_suspend ();
4641 MonoThreadInfo *info;
4643 gboolean protected_wrapper;
4644 gboolean running_managed;
4646 /*A null info usually means the thread is already dead. */
4647 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4648 UNLOCK_THREAD (thread);
4652 ji = mono_thread_info_get_last_managed (info);
4653 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4654 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4656 if (running_managed && !protected_wrapper) {
4657 transition_to_suspended (thread, info);
4660 gpointer interrupt_handle;
4663 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4664 InterlockedIncrement (&thread_interruption_requested);
4667 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4669 mono_thread_info_finish_suspend_and_resume (info);
4672 wapi_finish_interrupt_thread (interrupt_handle);
4674 UNLOCK_THREAD (thread);
4679 /*This is called with @thread synch_cs held and it must release it*/
4681 self_suspend_internal (MonoInternalThread *thread)
4683 if (!mono_thread_info_new_interrupt_enabled ()) {
4684 thread->state &= ~ThreadState_SuspendRequested;
4685 thread->state |= ThreadState_Suspended;
4686 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4687 if (thread->suspend_event == NULL) {
4688 UNLOCK_THREAD (thread);
4691 if (thread->suspended_event)
4692 SetEvent (thread->suspended_event);
4694 UNLOCK_THREAD (thread);
4696 if (shutting_down) {
4697 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4702 WaitForSingleObject (thread->suspend_event, INFINITE);
4704 LOCK_THREAD (thread);
4706 CloseHandle (thread->suspend_event);
4707 thread->suspend_event = NULL;
4708 thread->state &= ~ThreadState_Suspended;
4710 /* The thread that requested the resume will have replaced this event
4711 * and will be waiting for it
4713 SetEvent (thread->resume_event);
4715 UNLOCK_THREAD (thread);
4719 transition_to_suspended (thread, NULL);
4720 mono_thread_info_self_suspend ();
4723 /*This is called with @thread synch_cs held and it must release it*/
4725 resume_thread_internal (MonoInternalThread *thread)
4727 if (!mono_thread_info_new_interrupt_enabled ()) {
4728 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4729 if (thread->resume_event == NULL) {
4730 UNLOCK_THREAD (thread);
4734 /* Awake the thread */
4735 SetEvent (thread->suspend_event);
4737 UNLOCK_THREAD (thread);
4739 /* Wait for the thread to awake */
4740 WaitForSingleObject (thread->resume_event, INFINITE);
4741 CloseHandle (thread->resume_event);
4742 thread->resume_event = NULL;
4746 UNLOCK_THREAD (thread);
4747 /* Awake the thread */
4748 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4750 LOCK_THREAD (thread);
4751 thread->state &= ~ThreadState_Suspended;
4752 UNLOCK_THREAD (thread);
4758 * mono_thread_is_foreign:
4759 * @thread: the thread to query
4761 * This function allows one to determine if a thread was created by the mono runtime and has
4762 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4764 * Returns: true if @thread was not created by the runtime.
4767 mono_thread_is_foreign (MonoThread *thread)
4769 MonoThreadInfo *info = thread->internal_thread->thread_info;
4770 return info->runtime_thread == FALSE;
4774 * mono_add_joinable_thread:
4776 * Add TID to the list of joinable threads.
4777 * LOCKING: Acquires the threads lock.
4780 mono_threads_add_joinable_thread (gpointer tid)
4784 * We cannot detach from threads because it causes problems like
4785 * 2fd16f60/r114307. So we collect them and join them when
4786 * we have time (in he finalizer thread).
4788 joinable_threads_lock ();
4789 if (!joinable_threads)
4790 joinable_threads = g_hash_table_new (NULL, NULL);
4791 g_hash_table_insert (joinable_threads, tid, tid);
4792 joinable_thread_count ++;
4793 joinable_threads_unlock ();
4795 mono_gc_finalize_notify ();
4800 * mono_threads_join_threads:
4802 * Join all joinable threads. This is called from the finalizer thread.
4803 * LOCKING: Acquires the threads lock.
4806 mono_threads_join_threads (void)
4809 GHashTableIter iter;
4816 if (!joinable_thread_count)
4820 joinable_threads_lock ();
4822 if (g_hash_table_size (joinable_threads)) {
4823 g_hash_table_iter_init (&iter, joinable_threads);
4824 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4825 thread = (pthread_t)tid;
4826 g_hash_table_remove (joinable_threads, key);
4827 joinable_thread_count --;
4830 joinable_threads_unlock ();
4832 if (thread != pthread_self ())
4833 /* This shouldn't block */
4834 pthread_join (thread, NULL);
4845 * Wait for thread TID to exit.
4846 * LOCKING: Acquires the threads lock.
4849 mono_thread_join (gpointer tid)
4853 gboolean found = FALSE;
4855 joinable_threads_lock ();
4856 if (!joinable_threads)
4857 joinable_threads = g_hash_table_new (NULL, NULL);
4858 if (g_hash_table_lookup (joinable_threads, tid)) {
4859 g_hash_table_remove (joinable_threads, tid);
4860 joinable_thread_count --;
4863 joinable_threads_unlock ();
4866 thread = (pthread_t)tid;
4867 pthread_join (thread, NULL);