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() EnterCriticalSection (&threads_mutex)
124 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
125 static CRITICAL_SECTION threads_mutex;
127 /* Controls access to context static data */
128 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
129 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
130 static CRITICAL_SECTION contexts_mutex;
132 /* Controls access to the 'joinable_threads' hash table */
133 #define joinable_threads_lock() EnterCriticalSection (&joinable_threads_mutex)
134 #define joinable_threads_unlock() LeaveCriticalSection (&joinable_threads_mutex)
135 static CRITICAL_SECTION 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() EnterCriticalSection (&interlocked_mutex)
212 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
213 static CRITICAL_SECTION 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 /* handle_store() and handle_remove() manage the array of threads that
246 * still need to be waited for when the main thread exits.
248 * If handle_store() returns FALSE the thread must not be started
249 * because Mono is shutting down.
251 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
253 mono_threads_lock ();
255 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
257 if (threads_starting_up)
258 mono_g_hash_table_remove (threads_starting_up, thread);
260 if (shutting_down && !force_attach) {
261 mono_threads_unlock ();
266 MONO_GC_REGISTER_ROOT_FIXED (threads);
267 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
270 /* We don't need to duplicate thread->handle, because it is
271 * only closed when the thread object is finalized by the GC.
273 g_assert (thread->internal_thread);
274 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
275 thread->internal_thread);
277 mono_threads_unlock ();
282 static gboolean handle_remove(MonoInternalThread *thread)
285 gsize tid = thread->tid;
287 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
289 mono_threads_lock ();
292 /* We have to check whether the thread object for the
293 * tid is still the same in the table because the
294 * thread might have been destroyed and the tid reused
295 * in the meantime, in which case the tid would be in
296 * the table, but with another thread object.
298 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
299 mono_g_hash_table_remove (threads, (gpointer)tid);
308 mono_threads_unlock ();
310 /* Don't close the handle here, wait for the object finalizer
311 * to do it. Otherwise, the following race condition applies:
313 * 1) Thread exits (and handle_remove() closes the handle)
315 * 2) Some other handle is reassigned the same slot
317 * 3) Another thread tries to join the first thread, and
318 * blocks waiting for the reassigned handle to be signalled
319 * (which might never happen). This is possible, because the
320 * thread calling Join() still has a reference to the first
326 static void ensure_synch_cs_set (MonoInternalThread *thread)
328 CRITICAL_SECTION *synch_cs;
330 if (thread->synch_cs != NULL) {
334 synch_cs = g_new0 (CRITICAL_SECTION, 1);
335 InitializeCriticalSection (synch_cs);
337 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
338 synch_cs, NULL) != NULL) {
339 /* Another thread must have installed this CS */
340 DeleteCriticalSection (synch_cs);
346 lock_thread (MonoInternalThread *thread)
348 if (!thread->synch_cs)
349 ensure_synch_cs_set (thread);
351 g_assert (thread->synch_cs);
352 EnterCriticalSection (thread->synch_cs);
356 unlock_thread (MonoInternalThread *thread)
358 LeaveCriticalSection (thread->synch_cs);
362 * NOTE: this function can be called also for threads different from the current one:
363 * make sure no code called from it will ever assume it is run on the thread that is
364 * getting cleaned up.
366 static void thread_cleanup (MonoInternalThread *thread)
368 g_assert (thread != NULL);
370 if (thread->abort_state_handle) {
371 mono_gchandle_free (thread->abort_state_handle);
372 thread->abort_state_handle = 0;
374 thread->abort_exc = NULL;
375 thread->current_appcontext = NULL;
378 * This is necessary because otherwise we might have
379 * cross-domain references which will not get cleaned up when
380 * the target domain is unloaded.
382 if (thread->cached_culture_info) {
384 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
385 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
389 * thread->synch_cs can be NULL if this was called after
390 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
391 * This can happen only during shutdown.
392 * The shutting_down flag is not always set, so we can't assert on it.
394 if (thread->synch_cs)
395 LOCK_THREAD (thread);
397 thread->state |= ThreadState_Stopped;
398 thread->state &= ~ThreadState_Background;
400 if (thread->synch_cs)
401 UNLOCK_THREAD (thread);
404 An interruption request has leaked to cleanup. Adjust the global counter.
406 This can happen is the abort source thread finds the abortee (this) thread
407 in unmanaged code. If this thread never trips back to managed code or check
408 the local flag it will be left set and positively unbalance the global counter.
410 Leaving the counter unbalanced will cause a performance degradation since all threads
411 will now keep checking their local flags all the time.
413 if (InterlockedExchange (&thread->interruption_requested, 0))
414 InterlockedDecrement (&thread_interruption_requested);
416 /* if the thread is not in the hash it has been removed already */
417 if (!handle_remove (thread)) {
418 if (thread == mono_thread_internal_current ()) {
419 mono_domain_unset ();
420 mono_memory_barrier ();
422 /* This needs to be called even if handle_remove () fails */
423 if (mono_thread_cleanup_fn)
424 mono_thread_cleanup_fn (thread);
427 mono_release_type_locks (thread);
429 mono_profiler_thread_end (thread->tid);
431 if (thread == mono_thread_internal_current ()) {
433 * This will signal async signal handlers that the thread has exited.
434 * The profiler callback needs this to be set, so it cannot be done earlier.
436 mono_domain_unset ();
437 mono_memory_barrier ();
440 if (thread == mono_thread_internal_current ())
441 mono_thread_pop_appdomain_ref ();
443 thread->cached_culture_info = NULL;
445 mono_free_static_data (thread->static_data, TRUE);
446 thread->static_data = NULL;
447 ref_stack_destroy (thread->appdomain_refs);
448 thread->appdomain_refs = NULL;
450 if (mono_thread_cleanup_fn)
451 mono_thread_cleanup_fn (thread);
453 if (mono_gc_is_moving ()) {
454 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
455 thread->thread_pinning_ref = NULL;
460 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
463 g_assert ((offset & 0x80000000) == 0);
464 offset &= 0x7fffffff;
465 idx = (offset >> 24) - 1;
466 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
470 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
472 static MonoClassField *current_thread_field = NULL;
476 if (!current_thread_field) {
477 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
478 g_assert (current_thread_field);
481 mono_class_vtable (domain, mono_defaults.thread_class);
482 mono_domain_lock (domain);
483 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
484 mono_domain_unlock (domain);
487 return get_thread_static_data (thread, offset);
491 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
493 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
495 g_assert (current->obj.vtable->domain == domain);
497 g_assert (!*current_thread_ptr);
498 *current_thread_ptr = current;
502 create_thread_object (MonoDomain *domain)
504 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
505 return (MonoThread*)mono_gc_alloc_mature (vt);
509 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
511 MonoThread *thread = create_thread_object (domain);
512 MONO_OBJECT_SETREF (thread, internal_thread, internal);
516 static MonoInternalThread*
517 create_internal_thread (void)
519 MonoInternalThread *thread;
522 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
523 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
525 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
526 InitializeCriticalSection (thread->synch_cs);
528 thread->apartment_state = ThreadApartmentState_Unknown;
529 thread->managed_id = get_next_managed_thread_id ();
530 if (mono_gc_is_moving ()) {
531 thread->thread_pinning_ref = thread;
532 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
539 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
541 MonoDomain *domain = mono_get_root_domain ();
543 if (!candidate || candidate->obj.vtable->domain != domain)
544 candidate = new_thread_with_internal (domain, thread);
545 set_current_thread_for_domain (domain, thread, candidate);
546 g_assert (!thread->root_domain_thread);
547 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
550 static guint32 WINAPI start_wrapper_internal(void *data)
552 MonoThreadInfo *info;
553 StartInfo *start_info = (StartInfo *)data;
554 guint32 (*start_func)(void *);
558 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
561 MonoInternalThread *internal = start_info->obj->internal_thread;
562 MonoObject *start_delegate = start_info->delegate;
563 MonoDomain *domain = start_info->obj->obj.vtable->domain;
565 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
567 /* We can be sure start_info->obj->tid and
568 * start_info->obj->handle have been set, because the thread
569 * was created suspended, and these values were set before the
573 info = mono_thread_info_current ();
575 internal->thread_info = info;
580 SET_CURRENT_OBJECT (internal);
582 mono_monitor_init_tls ();
584 /* Every thread references the appdomain which created it */
585 mono_thread_push_appdomain_ref (domain);
587 if (!mono_domain_set (domain, FALSE)) {
588 /* No point in raising an appdomain_unloaded exception here */
589 /* FIXME: Cleanup here */
590 mono_thread_pop_appdomain_ref ();
594 start_func = start_info->func;
595 start_arg = start_info->start_arg;
597 /* We have to do this here because mono_thread_new_init()
598 requires that root_domain_thread is set up. */
599 thread_adjust_static_data (internal);
600 init_root_domain_thread (internal, start_info->obj);
602 /* This MUST be called before any managed code can be
603 * executed, as it calls the callback function that (for the
604 * jit) sets the lmf marker.
606 mono_thread_new_init (tid, &tid, start_func);
607 internal->stack_ptr = &tid;
609 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
611 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
613 /* On 2.0 profile (and higher), set explicitly since state might have been
615 if (internal->apartment_state == ThreadApartmentState_Unknown)
616 internal->apartment_state = ThreadApartmentState_MTA;
618 mono_thread_init_apartment_state ();
620 if(internal->start_notify!=NULL) {
621 /* Let the thread that called Start() know we're
624 ReleaseSemaphore (internal->start_notify, 1, NULL);
627 mono_threads_lock ();
628 mono_g_hash_table_remove (thread_start_args, start_info->obj);
629 mono_threads_unlock ();
631 mono_thread_set_execution_context (start_info->obj->ec_to_set);
632 start_info->obj->ec_to_set = NULL;
635 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
639 * Call this after calling start_notify, since the profiler callback might want
640 * to lock the thread, and the lock is held by thread_start () which waits for
643 mono_profiler_thread_start (tid);
645 /* start_func is set only for unmanaged start functions */
647 start_func (start_arg);
650 g_assert (start_delegate != NULL);
651 args [0] = start_arg;
652 /* we may want to handle the exception here. See comment below on unhandled exceptions */
653 mono_runtime_delegate_invoke (start_delegate, args, NULL);
656 /* If the thread calls ExitThread at all, this remaining code
657 * will not be executed, but the main thread will eventually
658 * call thread_cleanup() on this thread's behalf.
661 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
663 /* Do any cleanup needed for apartment state. This
664 * cannot be done in thread_cleanup since thread_cleanup could be
665 * called for a thread other than the current thread.
666 * mono_thread_cleanup_apartment_state cleans up apartment
667 * for the current thead */
668 mono_thread_cleanup_apartment_state ();
670 thread_cleanup (internal);
674 /* Remove the reference to the thread object in the TLS data,
675 * so the thread object can be finalized. This won't be
676 * reached if the thread threw an uncaught exception, so those
677 * thread handles will stay referenced :-( (This is due to
678 * missing support for scanning thread-specific data in the
679 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
682 SET_CURRENT_OBJECT (NULL);
687 static guint32 WINAPI start_wrapper(void *data)
691 /* Avoid scanning the frames above this frame during a GC */
692 mono_gc_set_stack_end ((void*)&dummy);
694 return start_wrapper_internal (data);
700 * Common thread creation code.
701 * LOCKING: Acquires the threads lock.
704 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
705 gboolean throw_on_failure)
707 HANDLE thread_handle;
708 MonoNativeThreadId tid;
709 guint32 create_flags;
711 mono_threads_lock ();
714 mono_threads_unlock ();
718 * The thread start argument may be an object reference, and there is
719 * no ref to keep it alive when the new thread is started but not yet
720 * registered with the collector. So we store it in a GC tracked hash
723 if (thread_start_args == NULL) {
724 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
725 thread_start_args = mono_g_hash_table_new (NULL, NULL);
727 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
728 if (threads_starting_up == NULL) {
729 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
730 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
732 mono_g_hash_table_insert (threads_starting_up, thread, thread);
733 mono_threads_unlock ();
735 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
736 if (!internal->start_notify) {
737 mono_threads_lock ();
738 mono_g_hash_table_remove (threads_starting_up, thread);
739 mono_threads_unlock ();
740 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
746 stack_size = default_stacksize_for_thread (internal);
748 /* Create suspended, so we can do some housekeeping before the thread
751 create_flags = CREATE_SUSPENDED;
752 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
753 stack_size, create_flags, &tid);
754 if (thread_handle == NULL) {
755 /* The thread couldn't be created, so throw an exception */
756 mono_threads_lock ();
757 mono_g_hash_table_remove (threads_starting_up, thread);
758 mono_threads_unlock ();
760 if (throw_on_failure)
761 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
763 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
766 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
768 internal->handle = thread_handle;
769 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
771 internal->threadpool_thread = threadpool_thread;
772 if (threadpool_thread)
773 mono_thread_set_state (internal, ThreadState_Background);
775 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
777 /* Only store the handle when the thread is about to be
778 * launched, to avoid the main thread deadlocking while trying
779 * to clean up a thread that will never be signalled.
781 if (!handle_store (thread, FALSE))
784 mono_thread_info_resume (tid);
786 if (internal->start_notify) {
788 * Wait for the thread to set up its TLS data etc, so
789 * theres no potential race condition if someone tries
790 * to look up the data believing the thread has
793 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
795 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
796 CloseHandle (internal->start_notify);
797 internal->start_notify = NULL;
800 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
805 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
807 if (mono_thread_start_cb) {
808 mono_thread_start_cb (tid, stack_start, func);
812 void mono_threads_set_default_stacksize (guint32 stacksize)
814 default_stacksize = stacksize;
817 guint32 mono_threads_get_default_stacksize (void)
819 return default_stacksize;
823 * mono_thread_create_internal:
827 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
830 MonoInternalThread *internal;
831 StartInfo *start_info;
834 thread = create_thread_object (domain);
835 internal = create_internal_thread ();
836 MONO_OBJECT_SETREF (thread, internal_thread, internal);
838 start_info = g_new0 (StartInfo, 1);
839 start_info->func = func;
840 start_info->obj = thread;
841 start_info->start_arg = arg;
843 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
847 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
848 if (mono_check_corlib_version () == NULL)
849 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
855 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
857 mono_thread_create_internal (domain, func, arg, FALSE, 0);
861 mono_thread_attach (MonoDomain *domain)
863 return mono_thread_attach_full (domain, FALSE);
867 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
869 MonoThreadInfo *info;
870 MonoInternalThread *thread;
871 MonoThread *current_thread;
872 HANDLE thread_handle;
875 if ((thread = mono_thread_internal_current ())) {
876 if (domain != mono_domain_get ())
877 mono_domain_set (domain, TRUE);
878 /* Already attached */
879 return mono_thread_current ();
882 if (!mono_gc_register_thread (&domain)) {
883 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 ());
886 thread = create_internal_thread ();
888 thread_handle = mono_thread_info_open_handle ();
889 g_assert (thread_handle);
891 tid=GetCurrentThreadId ();
893 thread->handle=thread_handle;
895 #ifdef PLATFORM_ANDROID
896 thread->android_tid = (gpointer) gettid ();
898 thread->stack_ptr = &tid;
900 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
902 info = mono_thread_info_current ();
904 thread->thread_info = info;
906 current_thread = new_thread_with_internal (domain, thread);
908 if (!handle_store (current_thread, force_attach)) {
909 /* Mono is shutting down, so just wait for the end */
914 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
916 SET_CURRENT_OBJECT (thread);
917 mono_domain_set (domain, TRUE);
919 mono_monitor_init_tls ();
921 thread_adjust_static_data (thread);
923 init_root_domain_thread (thread, current_thread);
924 if (domain != mono_get_root_domain ())
925 set_current_thread_for_domain (domain, thread, current_thread);
928 if (mono_thread_attach_cb) {
932 mono_thread_info_get_stack_bounds (&staddr, &stsize);
935 mono_thread_attach_cb (tid, &tid);
937 mono_thread_attach_cb (tid, staddr + stsize);
940 // FIXME: Need a separate callback
941 mono_profiler_thread_start (tid);
943 return current_thread;
947 mono_thread_detach (MonoThread *thread)
949 g_return_if_fail (thread != NULL);
951 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
953 thread_cleanup (thread->internal_thread);
955 SET_CURRENT_OBJECT (NULL);
956 mono_domain_unset ();
958 /* Don't need to CloseHandle this thread, even though we took a
959 * reference in mono_thread_attach (), because the GC will do it
960 * when the Thread object is finalised.
967 MonoInternalThread *thread = mono_thread_internal_current ();
969 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
971 thread_cleanup (thread);
972 SET_CURRENT_OBJECT (NULL);
973 mono_domain_unset ();
975 /* we could add a callback here for embedders to use. */
976 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
977 exit (mono_environment_exitcode_get ());
978 mono_thread_info_exit ();
982 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
984 MonoInternalThread *internal = create_internal_thread ();
986 internal->state = ThreadState_Unstarted;
988 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
992 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this,
995 StartInfo *start_info;
996 MonoInternalThread *internal;
999 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1001 if (!this->internal_thread)
1002 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1003 internal = this->internal_thread;
1005 LOCK_THREAD (internal);
1007 if ((internal->state & ThreadState_Unstarted) == 0) {
1008 UNLOCK_THREAD (internal);
1009 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1013 if ((internal->state & ThreadState_Aborted) != 0) {
1014 UNLOCK_THREAD (internal);
1017 /* This is freed in start_wrapper */
1018 start_info = g_new0 (StartInfo, 1);
1019 start_info->func = NULL;
1020 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1021 start_info->delegate = start;
1022 start_info->obj = this;
1023 g_assert (this->obj.vtable->domain == mono_domain_get ());
1025 res = create_thread (this, internal, start_info, FALSE, 0, FALSE);
1027 UNLOCK_THREAD (internal);
1031 internal->state &= ~ThreadState_Unstarted;
1033 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1035 UNLOCK_THREAD (internal);
1036 return internal->handle;
1040 * This is called from the finalizer of the internal thread object.
1043 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1045 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1048 * Since threads keep a reference to their thread object while running, by the time this function is called,
1049 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1050 * when thread_cleanup () can be called after this.
1053 CloseHandle (thread);
1055 if (this->synch_cs) {
1056 CRITICAL_SECTION *synch_cs = this->synch_cs;
1057 this->synch_cs = NULL;
1058 DeleteCriticalSection (synch_cs);
1063 void *name = this->name;
1069 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1072 MonoInternalThread *thread = mono_thread_internal_current ();
1074 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1076 mono_thread_current_check_pending_interrupt ();
1079 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1081 res = SleepEx(ms,TRUE);
1083 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1085 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1086 MonoException* exc = mono_thread_execute_interruption (thread);
1088 mono_raise_exception (exc);
1100 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1105 ves_icall_System_Threading_Thread_GetDomainID (void)
1107 return mono_domain_get()->domain_id;
1111 ves_icall_System_Threading_Thread_Yield (void)
1113 return mono_thread_info_yield ();
1117 * mono_thread_get_name:
1119 * Return the name of the thread. NAME_LEN is set to the length of the name.
1120 * Return NULL if the thread has no name. The returned memory is owned by the
1124 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1128 LOCK_THREAD (this_obj);
1130 if (!this_obj->name) {
1134 *name_len = this_obj->name_len;
1135 res = g_new (gunichar2, this_obj->name_len);
1136 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1139 UNLOCK_THREAD (this_obj);
1145 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1149 LOCK_THREAD (this_obj);
1151 if (!this_obj->name)
1154 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1156 UNLOCK_THREAD (this_obj);
1162 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1164 LOCK_THREAD (this_obj);
1166 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1167 UNLOCK_THREAD (this_obj);
1169 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1173 this_obj->name = g_new (gunichar2, mono_string_length (name));
1174 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1175 this_obj->name_len = mono_string_length (name);
1178 this_obj->name = NULL;
1181 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1183 UNLOCK_THREAD (this_obj);
1185 if (this_obj->name) {
1186 char *tname = mono_string_to_utf8 (name);
1188 if (this_obj->tid) {
1189 mono_profiler_thread_name (this_obj->tid, tname);
1190 mono_thread_info_set_name (this_obj->tid, tname);
1197 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1199 mono_thread_set_name_internal (this_obj, name, TRUE);
1202 /* If the array is already in the requested domain, we just return it,
1203 otherwise we return a copy in that domain. */
1205 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1212 if (mono_object_domain (arr) == domain)
1215 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1216 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1221 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1223 return byte_array_to_domain (arr, mono_get_root_domain ());
1227 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1229 return byte_array_to_domain (arr, mono_domain_get ());
1233 mono_thread_current (void)
1235 MonoDomain *domain = mono_domain_get ();
1236 MonoInternalThread *internal = mono_thread_internal_current ();
1237 MonoThread **current_thread_ptr;
1239 g_assert (internal);
1240 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1242 if (!*current_thread_ptr) {
1243 g_assert (domain != mono_get_root_domain ());
1244 *current_thread_ptr = new_thread_with_internal (domain, internal);
1246 return *current_thread_ptr;
1250 mono_thread_internal_current (void)
1252 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1253 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1257 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1258 int ms, HANDLE thread)
1260 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1263 mono_thread_current_check_pending_interrupt ();
1267 if ((this->state & ThreadState_Unstarted) != 0) {
1268 UNLOCK_THREAD (this);
1270 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1274 UNLOCK_THREAD (this);
1279 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1281 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1283 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1285 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1287 if(ret==WAIT_OBJECT_0) {
1288 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1293 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1299 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1307 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1310 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1312 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1314 if (ret != WAIT_IO_COMPLETION)
1317 exc = mono_thread_execute_interruption (thread);
1319 mono_raise_exception (exc);
1324 /* Re-calculate ms according to the time passed */
1325 diff_ms = (mono_100ns_ticks () - start) / 10000;
1326 if (diff_ms >= ms) {
1330 wait = ms - diff_ms;
1336 /* FIXME: exitContext isnt documented */
1337 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1343 MonoObject *waitHandle;
1344 MonoInternalThread *thread = mono_thread_internal_current ();
1346 /* Do this WaitSleepJoin check before creating objects */
1347 mono_thread_current_check_pending_interrupt ();
1349 numhandles = mono_array_length(mono_handles);
1350 handles = g_new0(HANDLE, numhandles);
1352 for(i = 0; i < numhandles; i++) {
1353 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1354 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1361 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1363 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1365 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1369 if(ret==WAIT_FAILED) {
1370 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1372 } else if(ret==WAIT_TIMEOUT) {
1373 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1380 /* FIXME: exitContext isnt documented */
1381 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1383 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
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 numhandles = mono_array_length(mono_handles);
1394 if (numhandles > MAXIMUM_WAIT_OBJECTS)
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, FALSE, ms, TRUE);
1410 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1412 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1415 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1417 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1418 return ret - WAIT_OBJECT_0;
1420 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1421 return ret - WAIT_ABANDONED_0;
1428 /* FIXME: exitContext isnt documented */
1429 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1432 MonoInternalThread *thread = mono_thread_internal_current ();
1434 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1440 mono_thread_current_check_pending_interrupt ();
1442 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1444 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1446 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1448 if(ret==WAIT_FAILED) {
1449 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1451 } else if(ret==WAIT_TIMEOUT) {
1452 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1460 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1463 MonoInternalThread *thread = mono_thread_internal_current ();
1468 mono_thread_current_check_pending_interrupt ();
1470 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1472 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1474 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1476 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1479 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1486 mutex = CreateMutex (NULL, owned, NULL);
1488 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1490 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1498 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1499 return(ReleaseMutex (handle));
1502 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1508 *error = ERROR_SUCCESS;
1510 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1512 *error = GetLastError ();
1519 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1526 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1528 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1529 mono_string_chars (name));
1531 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1539 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1543 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1548 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1552 *error = ERROR_SUCCESS;
1554 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1556 *error = GetLastError ();
1562 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1569 event = CreateEvent (NULL, manual, initial, NULL);
1571 event = CreateEvent (NULL, manual, initial,
1572 mono_string_chars (name));
1574 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1582 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1583 return (SetEvent(handle));
1586 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1587 return (ResetEvent(handle));
1591 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1592 CloseHandle (handle);
1595 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1601 *error = ERROR_SUCCESS;
1603 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1605 *error = GetLastError ();
1611 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1613 return InterlockedIncrement (location);
1616 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1618 #if SIZEOF_VOID_P == 4
1619 if (G_UNLIKELY ((size_t)location & 0x7)) {
1621 mono_interlocked_lock ();
1624 mono_interlocked_unlock ();
1628 return InterlockedIncrement64 (location);
1631 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1633 return InterlockedDecrement(location);
1636 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1638 #if SIZEOF_VOID_P == 4
1639 if (G_UNLIKELY ((size_t)location & 0x7)) {
1641 mono_interlocked_lock ();
1644 mono_interlocked_unlock ();
1648 return InterlockedDecrement64 (location);
1651 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1653 return InterlockedExchange(location, value);
1656 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1659 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1660 mono_gc_wbarrier_generic_nostore (location);
1664 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1666 return InterlockedExchangePointer(location, value);
1669 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1671 IntFloatUnion val, ret;
1674 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1680 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1682 #if SIZEOF_VOID_P == 4
1683 if (G_UNLIKELY ((size_t)location & 0x7)) {
1685 mono_interlocked_lock ();
1688 mono_interlocked_unlock ();
1692 return InterlockedExchange64 (location, value);
1696 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1698 LongDoubleUnion val, ret;
1701 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1706 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1708 return InterlockedCompareExchange(location, value, comparand);
1711 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1714 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1715 mono_gc_wbarrier_generic_nostore (location);
1719 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1721 return InterlockedCompareExchangePointer(location, value, comparand);
1724 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1726 IntFloatUnion val, ret, cmp;
1729 cmp.fval = comparand;
1730 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1736 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1738 #if SIZEOF_VOID_P == 8
1739 LongDoubleUnion val, comp, ret;
1742 comp.fval = comparand;
1743 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1749 mono_interlocked_lock ();
1751 if (old == comparand)
1753 mono_interlocked_unlock ();
1760 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1762 #if SIZEOF_VOID_P == 4
1763 if (G_UNLIKELY ((size_t)location & 0x7)) {
1765 mono_interlocked_lock ();
1767 if (old == comparand)
1769 mono_interlocked_unlock ();
1773 return InterlockedCompareExchange64 (location, value, comparand);
1777 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1780 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1781 mono_gc_wbarrier_generic_nostore (location);
1786 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1789 res = InterlockedExchangePointer ((gpointer *)location, value);
1790 mono_gc_wbarrier_generic_nostore (location);
1795 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1797 return InterlockedAdd (location, value);
1801 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1803 #if SIZEOF_VOID_P == 4
1804 if (G_UNLIKELY ((size_t)location & 0x7)) {
1806 mono_interlocked_lock ();
1809 mono_interlocked_unlock ();
1813 return InterlockedAdd64 (location, value);
1817 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1819 #if SIZEOF_VOID_P == 4
1820 if (G_UNLIKELY ((size_t)location & 0x7)) {
1822 mono_interlocked_lock ();
1824 mono_interlocked_unlock ();
1828 return InterlockedRead64 (location);
1832 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1834 mono_memory_barrier ();
1838 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1840 mono_thread_clr_state (this, state);
1842 if (state & ThreadState_Background) {
1843 /* If the thread changes the background mode, the main thread has to
1844 * be notified, since it has to rebuild the list of threads to
1847 SetEvent (background_change_event);
1852 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1854 mono_thread_set_state (this, state);
1856 if (state & ThreadState_Background) {
1857 /* If the thread changes the background mode, the main thread has to
1858 * be notified, since it has to rebuild the list of threads to
1861 SetEvent (background_change_event);
1866 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1872 state = this->state;
1874 UNLOCK_THREAD (this);
1879 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1881 MonoInternalThread *current;
1886 current = mono_thread_internal_current ();
1888 this->thread_interrupt_requested = TRUE;
1889 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1891 UNLOCK_THREAD (this);
1894 abort_thread_internal (this, TRUE, FALSE);
1898 void mono_thread_current_check_pending_interrupt ()
1900 MonoInternalThread *thread = mono_thread_internal_current ();
1901 gboolean throw = FALSE;
1903 LOCK_THREAD (thread);
1905 if (thread->thread_interrupt_requested) {
1907 thread->thread_interrupt_requested = FALSE;
1910 UNLOCK_THREAD (thread);
1913 mono_raise_exception (mono_get_exception_thread_interrupted ());
1918 mono_thread_get_abort_signal (void)
1922 #elif defined(PLATFORM_ANDROID)
1924 #elif !defined (SIGRTMIN)
1929 #endif /* SIGUSR1 */
1931 static int abort_signum = -1;
1933 if (abort_signum != -1)
1934 return abort_signum;
1935 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1936 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1937 struct sigaction sinfo;
1938 sigaction (i, NULL, &sinfo);
1939 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
1944 /* fallback to the old way */
1946 #endif /* HOST_WIN32 */
1950 static void CALLBACK interruption_request_apc (ULONG_PTR param)
1952 MonoException* exc = mono_thread_request_interruption (FALSE);
1953 if (exc) mono_raise_exception (exc);
1955 #endif /* HOST_WIN32 */
1958 * signal_thread_state_change
1960 * Tells the thread that his state has changed and it has to enter the new
1961 * state as soon as possible.
1963 static void signal_thread_state_change (MonoInternalThread *thread)
1965 if (thread == mono_thread_internal_current ()) {
1966 /* Do it synchronously */
1967 MonoException *exc = mono_thread_request_interruption (FALSE);
1969 mono_raise_exception (exc);
1973 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
1975 /* fixme: store the state somewhere */
1976 mono_thread_kill (thread, mono_thread_get_abort_signal ());
1979 * This will cause waits to be broken.
1980 * It will also prevent the thread from entering a wait, so if the thread returns
1981 * from the wait before it receives the abort signal, it will just spin in the wait
1982 * functions in the io-layer until the signal handler calls QueueUserAPC which will
1985 wapi_interrupt_thread (thread->handle);
1986 #endif /* HOST_WIN32 */
1990 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
1992 LOCK_THREAD (thread);
1994 if ((thread->state & ThreadState_AbortRequested) != 0 ||
1995 (thread->state & ThreadState_StopRequested) != 0 ||
1996 (thread->state & ThreadState_Stopped) != 0)
1998 UNLOCK_THREAD (thread);
2002 if ((thread->state & ThreadState_Unstarted) != 0) {
2003 thread->state |= ThreadState_Aborted;
2004 UNLOCK_THREAD (thread);
2008 thread->state |= ThreadState_AbortRequested;
2009 if (thread->abort_state_handle)
2010 mono_gchandle_free (thread->abort_state_handle);
2012 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2013 g_assert (thread->abort_state_handle);
2015 thread->abort_state_handle = 0;
2017 thread->abort_exc = NULL;
2020 * abort_exc is set in mono_thread_execute_interruption(),
2021 * triggered by the call to signal_thread_state_change(),
2022 * below. There's a point between where we have
2023 * abort_state_handle set, but abort_exc NULL, but that's not
2027 UNLOCK_THREAD (thread);
2029 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2031 /* During shutdown, we can't wait for other threads */
2033 /* Make sure the thread is awake */
2034 mono_thread_resume (thread);
2036 abort_thread_internal (thread, TRUE, TRUE);
2040 ves_icall_System_Threading_Thread_ResetAbort (void)
2042 MonoInternalThread *thread = mono_thread_internal_current ();
2043 gboolean was_aborting;
2045 LOCK_THREAD (thread);
2046 was_aborting = thread->state & ThreadState_AbortRequested;
2047 thread->state &= ~ThreadState_AbortRequested;
2048 UNLOCK_THREAD (thread);
2050 if (!was_aborting) {
2051 const char *msg = "Unable to reset abort because no abort was requested";
2052 mono_raise_exception (mono_get_exception_thread_state (msg));
2054 thread->abort_exc = NULL;
2055 if (thread->abort_state_handle) {
2056 mono_gchandle_free (thread->abort_state_handle);
2057 /* This is actually not necessary - the handle
2058 only counts if the exception is set */
2059 thread->abort_state_handle = 0;
2064 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2066 LOCK_THREAD (thread);
2068 thread->state &= ~ThreadState_AbortRequested;
2070 if (thread->abort_exc) {
2071 thread->abort_exc = NULL;
2072 if (thread->abort_state_handle) {
2073 mono_gchandle_free (thread->abort_state_handle);
2074 /* This is actually not necessary - the handle
2075 only counts if the exception is set */
2076 thread->abort_state_handle = 0;
2080 UNLOCK_THREAD (thread);
2084 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2086 MonoInternalThread *thread = this->internal_thread;
2087 MonoObject *state, *deserialized = NULL, *exc;
2090 if (!thread->abort_state_handle)
2093 state = mono_gchandle_get_target (thread->abort_state_handle);
2096 domain = mono_domain_get ();
2097 if (mono_object_domain (state) == domain)
2100 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2102 if (!deserialized) {
2103 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2105 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2106 mono_raise_exception (invalid_op_exc);
2109 return deserialized;
2113 mono_thread_suspend (MonoInternalThread *thread)
2115 LOCK_THREAD (thread);
2117 if ((thread->state & ThreadState_Unstarted) != 0 ||
2118 (thread->state & ThreadState_Aborted) != 0 ||
2119 (thread->state & ThreadState_Stopped) != 0)
2121 UNLOCK_THREAD (thread);
2125 if ((thread->state & ThreadState_Suspended) != 0 ||
2126 (thread->state & ThreadState_SuspendRequested) != 0 ||
2127 (thread->state & ThreadState_StopRequested) != 0)
2129 UNLOCK_THREAD (thread);
2133 thread->state |= ThreadState_SuspendRequested;
2135 UNLOCK_THREAD (thread);
2137 suspend_thread_internal (thread, FALSE);
2142 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2144 if (!mono_thread_suspend (thread))
2145 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2149 mono_thread_resume (MonoInternalThread *thread)
2151 LOCK_THREAD (thread);
2153 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2154 thread->state &= ~ThreadState_SuspendRequested;
2155 UNLOCK_THREAD (thread);
2159 if ((thread->state & ThreadState_Suspended) == 0 ||
2160 (thread->state & ThreadState_Unstarted) != 0 ||
2161 (thread->state & ThreadState_Aborted) != 0 ||
2162 (thread->state & ThreadState_Stopped) != 0)
2164 UNLOCK_THREAD (thread);
2168 return resume_thread_internal (thread);
2172 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2174 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2175 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2179 mono_threads_is_critical_method (MonoMethod *method)
2181 switch (method->wrapper_type) {
2182 case MONO_WRAPPER_RUNTIME_INVOKE:
2183 case MONO_WRAPPER_XDOMAIN_INVOKE:
2184 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2191 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2196 if (mono_threads_is_critical_method (m)) {
2197 *((gboolean*)data) = TRUE;
2204 is_running_protected_wrapper (void)
2206 gboolean found = FALSE;
2207 mono_stack_walk (find_wrapper, &found);
2211 void mono_thread_internal_stop (MonoInternalThread *thread)
2213 LOCK_THREAD (thread);
2215 if ((thread->state & ThreadState_StopRequested) != 0 ||
2216 (thread->state & ThreadState_Stopped) != 0)
2218 UNLOCK_THREAD (thread);
2222 /* Make sure the thread is awake */
2223 mono_thread_resume (thread);
2225 thread->state |= ThreadState_StopRequested;
2226 thread->state &= ~ThreadState_AbortRequested;
2228 UNLOCK_THREAD (thread);
2230 abort_thread_internal (thread, TRUE, TRUE);
2233 void mono_thread_stop (MonoThread *thread)
2235 mono_thread_internal_stop (thread->internal_thread);
2239 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2242 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2247 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2250 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2255 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2258 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2263 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2266 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2271 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2274 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2275 return (void *) tmp;
2279 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2281 volatile MonoObject *tmp;
2282 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2283 return (MonoObject *) tmp;
2287 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2290 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2295 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2298 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2303 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2305 return InterlockedRead8 (ptr);
2309 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2311 return InterlockedRead16 (ptr);
2315 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2317 return InterlockedRead (ptr);
2321 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2323 #if SIZEOF_VOID_P == 4
2324 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2326 mono_interlocked_lock ();
2327 val = *(gint64*)ptr;
2328 mono_interlocked_unlock ();
2332 return InterlockedRead64 (ptr);
2336 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2338 return InterlockedReadPointer (ptr);
2342 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2346 #if SIZEOF_VOID_P == 4
2347 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2349 mono_interlocked_lock ();
2350 val = *(double*)ptr;
2351 mono_interlocked_unlock ();
2356 u.ival = InterlockedRead64 (ptr);
2362 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2366 u.ival = InterlockedRead (ptr);
2372 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2374 return InterlockedReadPointer (ptr);
2378 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2380 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2384 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2386 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2390 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2392 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2396 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2398 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2402 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2404 mono_atomic_store_release ((volatile void **) ptr, value);
2408 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2410 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2414 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2416 mono_atomic_store_release ((volatile double *) ptr, value);
2420 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2422 mono_atomic_store_release ((volatile float *) ptr, value);
2426 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2428 InterlockedWrite8 (ptr, value);
2432 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2434 InterlockedWrite16 (ptr, value);
2438 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2440 InterlockedWrite (ptr, value);
2444 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2446 #if SIZEOF_VOID_P == 4
2447 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2448 mono_interlocked_lock ();
2449 *(gint64*)ptr = value;
2450 mono_interlocked_unlock ();
2455 InterlockedWrite64 (ptr, value);
2459 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2461 InterlockedWritePointer (ptr, value);
2465 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2469 #if SIZEOF_VOID_P == 4
2470 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2471 mono_interlocked_lock ();
2472 *(double*)ptr = value;
2473 mono_interlocked_unlock ();
2480 InterlockedWrite64 (ptr, u.ival);
2484 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2490 InterlockedWrite (ptr, u.ival);
2494 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2496 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2500 mono_thread_init_tls (void)
2502 MONO_FAST_TLS_INIT (tls_current_object);
2503 mono_native_tls_alloc (¤t_object_key, NULL);
2506 void mono_thread_init (MonoThreadStartCB start_cb,
2507 MonoThreadAttachCB attach_cb)
2509 InitializeCriticalSection(&threads_mutex);
2510 InitializeCriticalSection(&interlocked_mutex);
2511 InitializeCriticalSection(&contexts_mutex);
2512 InitializeCriticalSection(&joinable_threads_mutex);
2514 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2515 g_assert(background_change_event != NULL);
2517 mono_init_static_data_info (&thread_static_info);
2518 mono_init_static_data_info (&context_static_info);
2520 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2522 mono_thread_start_cb = start_cb;
2523 mono_thread_attach_cb = attach_cb;
2525 /* Get a pseudo handle to the current process. This is just a
2526 * kludge so that wapi can build a process handle if needed.
2527 * As a pseudo handle is returned, we don't need to clean
2530 GetCurrentProcess ();
2533 void mono_thread_cleanup (void)
2535 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2536 MonoThreadInfo *info;
2538 /* The main thread must abandon any held mutexes (particularly
2539 * important for named mutexes as they are shared across
2540 * processes, see bug 74680.) This will happen when the
2541 * thread exits, but if it's not running in a subthread it
2542 * won't exit in time.
2544 info = mono_thread_info_current ();
2545 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2549 /* This stuff needs more testing, it seems one of these
2550 * critical sections can be locked when mono_thread_cleanup is
2553 DeleteCriticalSection (&threads_mutex);
2554 DeleteCriticalSection (&interlocked_mutex);
2555 DeleteCriticalSection (&contexts_mutex);
2556 DeleteCriticalSection (&delayed_free_table_mutex);
2557 DeleteCriticalSection (&small_id_mutex);
2558 CloseHandle (background_change_event);
2561 mono_native_tls_free (current_object_key);
2565 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2567 mono_thread_cleanup_fn = func;
2571 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2573 thread->internal_thread->manage_callback = func;
2576 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2578 mono_thread_notify_pending_exc_fn = func;
2582 static void print_tids (gpointer key, gpointer value, gpointer user)
2584 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2585 * sizeof(uint) and a cast to uint would overflow
2587 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2588 * print this as a pointer.
2590 g_message ("Waiting for: %p", key);
2595 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2596 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2600 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2604 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2606 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2608 if(ret==WAIT_FAILED) {
2609 /* See the comment in build_wait_tids() */
2610 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2614 for(i=0; i<wait->num; i++)
2615 CloseHandle (wait->handles[i]);
2617 if (ret == WAIT_TIMEOUT)
2620 for(i=0; i<wait->num; i++) {
2621 gsize tid = wait->threads[i]->tid;
2624 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2625 * it can still run io-layer etc. code. So wait for it to really exit.
2626 * FIXME: This won't join threads which are not in the joinable_hash yet.
2628 mono_thread_join ((gpointer)tid);
2630 mono_threads_lock ();
2631 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2632 /* This thread must have been killed, because
2633 * it hasn't cleaned itself up. (It's just
2634 * possible that the thread exited before the
2635 * parent thread had a chance to store the
2636 * handle, and now there is another pointer to
2637 * the already-exited thread stored. In this
2638 * case, we'll just get two
2639 * mono_profiler_thread_end() calls for the
2643 mono_threads_unlock ();
2644 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2645 thread_cleanup (wait->threads[i]);
2647 mono_threads_unlock ();
2652 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2654 guint32 i, ret, count;
2656 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2658 /* Add the thread state change event, so it wakes up if a thread changes
2659 * to background mode.
2662 if (count < MAXIMUM_WAIT_OBJECTS) {
2663 wait->handles [count] = background_change_event;
2667 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2669 if(ret==WAIT_FAILED) {
2670 /* See the comment in build_wait_tids() */
2671 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2675 for(i=0; i<wait->num; i++)
2676 CloseHandle (wait->handles[i]);
2678 if (ret == WAIT_TIMEOUT)
2681 if (ret < wait->num) {
2682 gsize tid = wait->threads[ret]->tid;
2683 mono_threads_lock ();
2684 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2685 /* See comment in wait_for_tids about thread cleanup */
2686 mono_threads_unlock ();
2687 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2688 thread_cleanup (wait->threads [ret]);
2690 mono_threads_unlock ();
2694 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2696 struct wait_data *wait=(struct wait_data *)user;
2698 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2700 MonoInternalThread *thread=(MonoInternalThread *)value;
2702 /* Ignore background threads, we abort them later */
2703 /* Do not lock here since it is not needed and the caller holds threads_lock */
2704 if (thread->state & ThreadState_Background) {
2705 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2706 return; /* just leave, ignore */
2709 if (mono_gc_is_finalizer_internal_thread (thread)) {
2710 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2714 if (thread == mono_thread_internal_current ()) {
2715 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2719 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2720 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2724 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2725 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2729 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2730 if (handle == NULL) {
2731 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2735 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2736 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2737 wait->handles[wait->num]=handle;
2738 wait->threads[wait->num]=thread;
2741 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2743 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2748 /* Just ignore the rest, we can't do anything with
2755 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2757 struct wait_data *wait=(struct wait_data *)user;
2758 gsize self = GetCurrentThreadId ();
2759 MonoInternalThread *thread = value;
2762 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2765 /* The finalizer thread is not a background thread */
2766 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2767 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2769 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2773 /* printf ("A: %d\n", wait->num); */
2774 wait->handles[wait->num]=thread->handle;
2775 wait->threads[wait->num]=thread;
2778 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2779 mono_thread_internal_stop (thread);
2783 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2787 * mono_threads_set_shutting_down:
2789 * Is called by a thread that wants to shut down Mono. If the runtime is already
2790 * shutting down, the calling thread is suspended/stopped, and this function never
2794 mono_threads_set_shutting_down (void)
2796 MonoInternalThread *current_thread = mono_thread_internal_current ();
2798 mono_threads_lock ();
2800 if (shutting_down) {
2801 mono_threads_unlock ();
2803 /* Make sure we're properly suspended/stopped */
2805 LOCK_THREAD (current_thread);
2807 if ((current_thread->state & ThreadState_SuspendRequested) ||
2808 (current_thread->state & ThreadState_AbortRequested) ||
2809 (current_thread->state & ThreadState_StopRequested)) {
2810 UNLOCK_THREAD (current_thread);
2811 mono_thread_execute_interruption (current_thread);
2813 current_thread->state |= ThreadState_Stopped;
2814 UNLOCK_THREAD (current_thread);
2817 /*since we're killing the thread, unset the current domain.*/
2818 mono_domain_unset ();
2820 /* Wake up other threads potentially waiting for us */
2821 mono_thread_info_exit ();
2823 shutting_down = TRUE;
2825 /* Not really a background state change, but this will
2826 * interrupt the main thread if it is waiting for all
2827 * the other threads.
2829 SetEvent (background_change_event);
2831 mono_threads_unlock ();
2835 void mono_thread_manage (void)
2837 struct wait_data wait_data;
2838 struct wait_data *wait = &wait_data;
2840 memset (wait, 0, sizeof (struct wait_data));
2841 /* join each thread that's still running */
2842 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2844 mono_threads_lock ();
2846 THREAD_DEBUG (g_message("%s: No threads", __func__));
2847 mono_threads_unlock ();
2850 mono_threads_unlock ();
2853 mono_threads_lock ();
2854 if (shutting_down) {
2855 /* somebody else is shutting down */
2856 mono_threads_unlock ();
2859 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2860 mono_g_hash_table_foreach (threads, print_tids, NULL));
2862 ResetEvent (background_change_event);
2864 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2865 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2866 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2867 mono_threads_unlock ();
2869 /* Something to wait for */
2870 wait_for_tids_or_state_change (wait, INFINITE);
2872 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2873 } while(wait->num>0);
2875 /* Mono is shutting down, so just wait for the end */
2876 if (!mono_runtime_try_shutdown ()) {
2877 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2878 mono_thread_suspend (mono_thread_internal_current ());
2879 mono_thread_execute_interruption (mono_thread_internal_current ());
2883 * Remove everything but the finalizer thread and self.
2884 * Also abort all the background threads
2887 mono_threads_lock ();
2890 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2891 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2892 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2894 mono_threads_unlock ();
2896 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2898 /* Something to wait for */
2899 wait_for_tids (wait, INFINITE);
2901 } while (wait->num > 0);
2904 * give the subthreads a chance to really quit (this is mainly needed
2905 * to get correct user and system times from getrusage/wait/time(1)).
2906 * This could be removed if we avoid pthread_detach() and use pthread_join().
2909 mono_thread_info_yield ();
2913 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2915 MonoInternalThread *thread=(MonoInternalThread *)value;
2917 if(thread->tid != (gsize)user) {
2918 /*TerminateThread (thread->handle, -1);*/
2922 void mono_thread_abort_all_other_threads (void)
2924 gsize self = GetCurrentThreadId ();
2926 mono_threads_lock ();
2927 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2928 mono_g_hash_table_size (threads));
2929 mono_g_hash_table_foreach (threads, print_tids, NULL));
2931 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2933 mono_threads_unlock ();
2937 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2939 MonoInternalThread *thread = (MonoInternalThread*)value;
2940 struct wait_data *wait = (struct wait_data*)user_data;
2944 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2946 * This needs no locking.
2948 if ((thread->state & ThreadState_Suspended) != 0 ||
2949 (thread->state & ThreadState_Stopped) != 0)
2952 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2953 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2957 wait->handles [wait->num] = handle;
2958 wait->threads [wait->num] = thread;
2964 * mono_thread_suspend_all_other_threads:
2966 * Suspend all managed threads except the finalizer thread and this thread. It is
2967 * not possible to resume them later.
2969 void mono_thread_suspend_all_other_threads (void)
2971 struct wait_data wait_data;
2972 struct wait_data *wait = &wait_data;
2974 gsize self = GetCurrentThreadId ();
2976 guint32 eventidx = 0;
2977 gboolean starting, finished;
2979 memset (wait, 0, sizeof (struct wait_data));
2981 * The other threads could be in an arbitrary state at this point, i.e.
2982 * they could be starting up, shutting down etc. This means that there could be
2983 * threads which are not even in the threads hash table yet.
2987 * First we set a barrier which will be checked by all threads before they
2988 * are added to the threads hash table, and they will exit if the flag is set.
2989 * This ensures that no threads could be added to the hash later.
2990 * We will use shutting_down as the barrier for now.
2992 g_assert (shutting_down);
2995 * We make multiple calls to WaitForMultipleObjects since:
2996 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
2997 * - some threads could exit without becoming suspended
3002 * Make a copy of the hashtable since we can't do anything with
3003 * threads while threads_mutex is held.
3006 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3007 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3008 mono_threads_lock ();
3009 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3010 mono_threads_unlock ();
3012 events = g_new0 (gpointer, wait->num);
3014 /* Get the suspended events that we'll be waiting for */
3015 for (i = 0; i < wait->num; ++i) {
3016 MonoInternalThread *thread = wait->threads [i];
3017 gboolean signal_suspend = FALSE;
3019 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3020 //CloseHandle (wait->handles [i]);
3021 wait->threads [i] = NULL; /* ignore this thread in next loop */
3025 LOCK_THREAD (thread);
3027 if (thread->suspended_event == NULL) {
3028 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3029 if (thread->suspended_event == NULL) {
3030 /* Forget this one and go on to the next */
3031 UNLOCK_THREAD (thread);
3036 if ((thread->state & ThreadState_Suspended) != 0 ||
3037 (thread->state & ThreadState_StopRequested) != 0 ||
3038 (thread->state & ThreadState_Stopped) != 0) {
3039 UNLOCK_THREAD (thread);
3040 CloseHandle (wait->handles [i]);
3041 wait->threads [i] = NULL; /* ignore this thread in next loop */
3045 if ((thread->state & ThreadState_SuspendRequested) == 0)
3046 signal_suspend = TRUE;
3048 events [eventidx++] = thread->suspended_event;
3050 /* Convert abort requests into suspend requests */
3051 if ((thread->state & ThreadState_AbortRequested) != 0)
3052 thread->state &= ~ThreadState_AbortRequested;
3054 thread->state |= ThreadState_SuspendRequested;
3056 UNLOCK_THREAD (thread);
3058 /* Signal the thread to suspend */
3059 if (mono_thread_info_new_interrupt_enabled ())
3060 suspend_thread_internal (thread, TRUE);
3061 else if (signal_suspend)
3062 signal_thread_state_change (thread);
3065 /*Only wait on the suspend event if we are using the old path */
3066 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3067 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3068 for (i = 0; i < wait->num; ++i) {
3069 MonoInternalThread *thread = wait->threads [i];
3074 LOCK_THREAD (thread);
3075 if ((thread->state & ThreadState_Suspended) != 0) {
3076 CloseHandle (thread->suspended_event);
3077 thread->suspended_event = NULL;
3079 UNLOCK_THREAD (thread);
3083 if (eventidx <= 0) {
3085 * If there are threads which are starting up, we wait until they
3086 * are suspended when they try to register in the threads hash.
3087 * This is guaranteed to finish, since the threads which can create new
3088 * threads get suspended after a while.
3089 * FIXME: The finalizer thread can still create new threads.
3091 mono_threads_lock ();
3092 if (threads_starting_up)
3093 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3096 mono_threads_unlock ();
3108 collect_threads (gpointer key, gpointer value, gpointer user_data)
3110 MonoInternalThread *thread = (MonoInternalThread*)value;
3111 struct wait_data *wait = (struct wait_data*)user_data;
3114 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3115 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3119 wait->handles [wait->num] = handle;
3120 wait->threads [wait->num] = thread;
3125 static gboolean thread_dump_requested;
3127 static G_GNUC_UNUSED gboolean
3128 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3130 GString *p = (GString*)data;
3131 MonoMethod *method = NULL;
3133 method = mono_jit_info_get_method (frame->ji);
3136 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3137 g_string_append_printf (p, " %s\n", location);
3140 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3146 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3148 GString* text = g_string_new (0);
3150 GError *error = NULL;
3153 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3155 g_string_append_printf (text, "\n\"%s\"", name);
3158 else if (thread->threadpool_thread)
3159 g_string_append (text, "\n\"<threadpool thread>\"");
3161 g_string_append (text, "\n\"<unnamed thread>\"");
3164 /* This no longer works with remote unwinding */
3166 wapi_desc = wapi_current_thread_desc ();
3167 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3172 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3173 mono_thread_info_resume (mono_thread_info_get_tid (info));
3175 fprintf (stdout, "%s", text->str);
3177 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3178 OutputDebugStringA(text->str);
3181 g_string_free (text, TRUE);
3186 dump_thread (gpointer key, gpointer value, gpointer user)
3188 MonoInternalThread *thread = (MonoInternalThread *)value;
3189 MonoThreadInfo *info;
3191 if (thread == mono_thread_internal_current ())
3195 FIXME This still can hang if we stop a thread during malloc.
3196 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3197 that takes a callback and runs it with the target suspended.
3198 We probably should loop a bit around trying to get it to either managed code
3201 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3206 print_thread_dump (thread, info);
3210 mono_threads_perform_thread_dump (void)
3212 if (!thread_dump_requested)
3215 printf ("Full thread dump:\n");
3218 * Make a copy of the hashtable since we can't do anything with
3219 * threads while threads_mutex is held.
3221 mono_threads_lock ();
3222 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3223 mono_threads_unlock ();
3225 thread_dump_requested = FALSE;
3229 * mono_threads_request_thread_dump:
3231 * Ask all threads except the current to print their stacktrace to stdout.
3234 mono_threads_request_thread_dump (void)
3236 struct wait_data wait_data;
3237 struct wait_data *wait = &wait_data;
3240 /*The new thread dump code runs out of the finalizer thread. */
3241 if (mono_thread_info_new_interrupt_enabled ()) {
3242 thread_dump_requested = TRUE;
3243 mono_gc_finalize_notify ();
3248 memset (wait, 0, sizeof (struct wait_data));
3251 * Make a copy of the hashtable since we can't do anything with
3252 * threads while threads_mutex is held.
3254 mono_threads_lock ();
3255 mono_g_hash_table_foreach (threads, collect_threads, wait);
3256 mono_threads_unlock ();
3258 for (i = 0; i < wait->num; ++i) {
3259 MonoInternalThread *thread = wait->threads [i];
3261 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3262 (thread != mono_thread_internal_current ()) &&
3263 !thread->thread_dump_requested) {
3264 thread->thread_dump_requested = TRUE;
3266 signal_thread_state_change (thread);
3269 CloseHandle (wait->handles [i]);
3275 gint allocated; /* +1 so that refs [allocated] == NULL */
3279 typedef struct ref_stack RefStack;
3282 ref_stack_new (gint initial_size)
3286 initial_size = MAX (initial_size, 16) + 1;
3287 rs = g_new0 (RefStack, 1);
3288 rs->refs = g_new0 (gpointer, initial_size);
3289 rs->allocated = initial_size;
3294 ref_stack_destroy (gpointer ptr)
3305 ref_stack_push (RefStack *rs, gpointer ptr)
3307 g_assert (rs != NULL);
3309 if (rs->bottom >= rs->allocated) {
3310 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3311 rs->allocated <<= 1;
3312 rs->refs [rs->allocated] = NULL;
3314 rs->refs [rs->bottom++] = ptr;
3318 ref_stack_pop (RefStack *rs)
3320 if (rs == NULL || rs->bottom == 0)
3324 rs->refs [rs->bottom] = NULL;
3328 ref_stack_find (RefStack *rs, gpointer ptr)
3335 for (refs = rs->refs; refs && *refs; refs++) {
3343 * mono_thread_push_appdomain_ref:
3345 * Register that the current thread may have references to objects in domain
3346 * @domain on its stack. Each call to this function should be paired with a
3347 * call to pop_appdomain_ref.
3350 mono_thread_push_appdomain_ref (MonoDomain *domain)
3352 MonoInternalThread *thread = mono_thread_internal_current ();
3355 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3356 SPIN_LOCK (thread->lock_thread_id);
3357 if (thread->appdomain_refs == NULL)
3358 thread->appdomain_refs = ref_stack_new (16);
3359 ref_stack_push (thread->appdomain_refs, domain);
3360 SPIN_UNLOCK (thread->lock_thread_id);
3365 mono_thread_pop_appdomain_ref (void)
3367 MonoInternalThread *thread = mono_thread_internal_current ();
3370 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3371 SPIN_LOCK (thread->lock_thread_id);
3372 ref_stack_pop (thread->appdomain_refs);
3373 SPIN_UNLOCK (thread->lock_thread_id);
3378 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3381 SPIN_LOCK (thread->lock_thread_id);
3382 res = ref_stack_find (thread->appdomain_refs, domain);
3383 SPIN_UNLOCK (thread->lock_thread_id);
3388 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3390 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3393 typedef struct abort_appdomain_data {
3394 struct wait_data wait;
3396 } abort_appdomain_data;
3399 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3401 MonoInternalThread *thread = (MonoInternalThread*)value;
3402 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3403 MonoDomain *domain = data->domain;
3405 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3406 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3408 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3409 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3412 data->wait.handles [data->wait.num] = handle;
3413 data->wait.threads [data->wait.num] = thread;
3416 /* Just ignore the rest, we can't do anything with
3424 * mono_threads_abort_appdomain_threads:
3426 * Abort threads which has references to the given appdomain.
3429 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3431 #ifdef __native_client__
3435 abort_appdomain_data user_data;
3437 int orig_timeout = timeout;
3440 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3442 start_time = mono_msec_ticks ();
3444 mono_threads_lock ();
3446 user_data.domain = domain;
3447 user_data.wait.num = 0;
3448 /* This shouldn't take any locks */
3449 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3450 mono_threads_unlock ();
3452 if (user_data.wait.num > 0) {
3453 /* Abort the threads outside the threads lock */
3454 for (i = 0; i < user_data.wait.num; ++i)
3455 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3458 * We should wait for the threads either to abort, or to leave the
3459 * domain. We can't do the latter, so we wait with a timeout.
3461 wait_for_tids (&user_data.wait, 100);
3464 /* Update remaining time */
3465 timeout -= mono_msec_ticks () - start_time;
3466 start_time = mono_msec_ticks ();
3468 if (orig_timeout != -1 && timeout < 0)
3471 while (user_data.wait.num > 0);
3473 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3479 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3481 MonoInternalThread *thread = (MonoInternalThread*)value;
3482 MonoDomain *domain = (MonoDomain*)user_data;
3485 /* No locking needed here */
3486 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3488 if (thread->cached_culture_info) {
3489 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3490 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3491 if (obj && obj->vtable->domain == domain)
3492 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3498 * mono_threads_clear_cached_culture:
3500 * Clear the cached_current_culture from all threads if it is in the
3504 mono_threads_clear_cached_culture (MonoDomain *domain)
3506 mono_threads_lock ();
3507 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3508 mono_threads_unlock ();
3512 * mono_thread_get_undeniable_exception:
3514 * Return an exception which needs to be raised when leaving a catch clause.
3515 * This is used for undeniable exception propagation.
3518 mono_thread_get_undeniable_exception (void)
3520 MonoInternalThread *thread = mono_thread_internal_current ();
3522 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3524 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3525 * exception if the thread no longer references a dying appdomain.
3527 thread->abort_exc->trace_ips = NULL;
3528 thread->abort_exc->stack_trace = NULL;
3529 return thread->abort_exc;
3535 #if MONO_SMALL_CONFIG
3536 #define NUM_STATIC_DATA_IDX 4
3537 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3541 #define NUM_STATIC_DATA_IDX 8
3542 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3543 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3547 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3550 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3553 gpointer *static_data = addr;
3554 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3557 if (!static_data [i])
3559 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3560 ptr = static_data [i];
3561 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3562 uintptr_t bmap = static_reference_bitmaps [i][j];
3565 if ((bmap & 1) && *p) {
3576 * mono_alloc_static_data
3578 * Allocate memory blocks for storing threads or context static data
3581 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3583 guint idx = (offset >> 24) - 1;
3586 gpointer* static_data = *static_data_ptr;
3588 static void* tls_desc = NULL;
3589 if (mono_gc_user_markers_supported () && !tls_desc)
3590 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3591 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3592 *static_data_ptr = static_data;
3593 static_data [0] = static_data;
3596 for (i = 1; i <= idx; ++i) {
3597 if (static_data [i])
3599 if (mono_gc_user_markers_supported () && threadlocal)
3600 static_data [i] = g_malloc0 (static_data_size [i]);
3602 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3607 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3610 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3611 gpointer p = static_data [i];
3615 * At this point, the static data pointer array is still registered with the
3616 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3617 * data. Freeing the individual arrays without first nulling their slots
3618 * would make it possible for mark_tls_slots() to encounter a pointer to
3619 * such an already freed array. See bug #13813.
3621 static_data [i] = NULL;
3622 mono_memory_write_barrier ();
3623 if (mono_gc_user_markers_supported () && threadlocal)
3626 mono_gc_free_fixed (p);
3628 mono_gc_free_fixed (static_data);
3632 * mono_init_static_data_info
3634 * Initializes static data counters
3636 static void mono_init_static_data_info (StaticDataInfo *static_data)
3638 static_data->idx = 0;
3639 static_data->offset = 0;
3640 static_data->freelist = NULL;
3644 * mono_alloc_static_data_slot
3646 * Generates an offset for static data. static_data contains the counters
3647 * used to generate it.
3650 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3654 if (!static_data->idx && !static_data->offset) {
3656 * we use the first chunk of the first allocation also as
3657 * an array for the rest of the data
3659 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3661 static_data->offset += align - 1;
3662 static_data->offset &= ~(align - 1);
3663 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3664 static_data->idx ++;
3665 g_assert (size <= static_data_size [static_data->idx]);
3666 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3667 static_data->offset = 0;
3669 offset = static_data->offset | ((static_data->idx + 1) << 24);
3670 static_data->offset += size;
3675 * ensure thread static fields already allocated are valid for thread
3676 * This function is called when a thread is created or on thread attach.
3679 thread_adjust_static_data (MonoInternalThread *thread)
3683 mono_threads_lock ();
3684 if (thread_static_info.offset || thread_static_info.idx > 0) {
3685 /* get the current allocated size */
3686 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3687 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3689 mono_threads_unlock ();
3693 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3695 MonoInternalThread *thread = value;
3696 guint32 offset = GPOINTER_TO_UINT (user);
3698 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3701 static MonoThreadDomainTls*
3702 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3704 MonoThreadDomainTls* prev = NULL;
3705 MonoThreadDomainTls* tmp = static_data->freelist;
3707 if (tmp->size == size) {
3709 prev->next = tmp->next;
3711 static_data->freelist = tmp->next;
3721 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3724 int idx = (offset >> 24) - 1;
3726 if (!static_reference_bitmaps [idx])
3727 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3728 rb = static_reference_bitmaps [idx];
3730 offset /= sizeof (gpointer);
3731 /* offset is now the bitmap offset */
3732 for (i = 0; i < numbits; ++i) {
3733 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3734 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3739 clear_reference_bitmap (guint32 offset, guint32 size)
3741 int idx = (offset >> 24) - 1;
3743 rb = static_reference_bitmaps [idx];
3745 offset /= sizeof (gpointer);
3746 size /= sizeof (gpointer);
3748 /* offset is now the bitmap offset */
3749 for (; offset < size; ++offset)
3750 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3754 * The offset for a special static variable is composed of three parts:
3755 * a bit that indicates the type of static data (0:thread, 1:context),
3756 * an index in the array of chunks of memory for the thread (thread->static_data)
3757 * and an offset in that chunk of mem. This allows allocating less memory in the
3762 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3765 if (static_type == SPECIAL_STATIC_THREAD) {
3766 MonoThreadDomainTls *item;
3767 mono_threads_lock ();
3768 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3769 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3771 offset = item->offset;
3774 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3776 update_tls_reference_bitmap (offset, bitmap, numbits);
3777 /* This can be called during startup */
3778 if (threads != NULL)
3779 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3780 mono_threads_unlock ();
3782 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3783 mono_contexts_lock ();
3784 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3785 mono_contexts_unlock ();
3786 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3792 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3794 /* The high bit means either thread (0) or static (1) data. */
3796 guint32 static_type = (offset & 0x80000000);
3799 offset &= 0x7fffffff;
3800 idx = (offset >> 24) - 1;
3802 if (static_type == 0) {
3803 return get_thread_static_data (thread, offset);
3805 /* Allocate static data block under demand, since we don't have a list
3808 MonoAppContext *context = mono_context_get ();
3809 if (!context->static_data || !context->static_data [idx]) {
3810 mono_contexts_lock ();
3811 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3812 mono_contexts_unlock ();
3814 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3819 mono_get_special_static_data (guint32 offset)
3821 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3830 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3832 MonoInternalThread *thread = value;
3833 TlsOffsetSize *data = user;
3834 int idx = (data->offset >> 24) - 1;
3837 if (!thread->static_data || !thread->static_data [idx])
3839 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3840 mono_gc_bzero_atomic (ptr, data->size);
3844 do_free_special_slot (guint32 offset, guint32 size)
3846 guint32 static_type = (offset & 0x80000000);
3847 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3848 if (static_type == 0) {
3850 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3851 data.offset = offset & 0x7fffffff;
3853 clear_reference_bitmap (data.offset, data.size);
3854 if (threads != NULL)
3855 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3856 item->offset = offset;
3859 if (!mono_runtime_is_shutting_down ()) {
3860 item->next = thread_static_info.freelist;
3861 thread_static_info.freelist = item;
3863 /* We could be called during shutdown after mono_thread_cleanup () is called */
3867 /* FIXME: free context static data as well */
3872 do_free_special (gpointer key, gpointer value, gpointer data)
3874 MonoClassField *field = key;
3875 guint32 offset = GPOINTER_TO_UINT (value);
3878 size = mono_type_size (field->type, &align);
3879 do_free_special_slot (offset, size);
3883 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3885 mono_threads_lock ();
3886 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3887 mono_threads_unlock ();
3891 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3893 mono_threads_lock ();
3894 do_free_special_slot (offset, size);
3895 mono_threads_unlock ();
3899 * allocates room in the thread local area for storing an instance of the struct type
3900 * the allocation is kept track of in domain->tlsrec_list.
3903 mono_thread_alloc_tls (MonoReflectionType *type)
3905 MonoDomain *domain = mono_domain_get ();
3907 MonoTlsDataRecord *tlsrec;
3910 gsize default_bitmap [4] = {0};
3911 uint32_t tls_offset;
3915 klass = mono_class_from_mono_type (type->type);
3916 /* TlsDatum is a struct, so we subtract the object header size offset */
3917 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3918 size = mono_type_size (type->type, &align);
3919 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3920 if (bitmap != default_bitmap)
3922 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3923 tlsrec->tls_offset = tls_offset;
3924 tlsrec->size = size;
3925 mono_domain_lock (domain);
3926 tlsrec->next = domain->tlsrec_list;
3927 domain->tlsrec_list = tlsrec;
3928 mono_domain_unlock (domain);
3933 mono_thread_destroy_tls (uint32_t tls_offset)
3935 MonoTlsDataRecord *prev = NULL;
3936 MonoTlsDataRecord *cur;
3938 MonoDomain *domain = mono_domain_get ();
3939 mono_domain_lock (domain);
3940 cur = domain->tlsrec_list;
3942 if (cur->tls_offset == tls_offset) {
3944 prev->next = cur->next;
3946 domain->tlsrec_list = cur->next;
3954 mono_domain_unlock (domain);
3956 mono_special_static_data_free_slot (tls_offset, size);
3960 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3963 mono_thread_destroy_domain_tls (MonoDomain *domain)
3965 while (domain->tlsrec_list)
3966 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
3969 static MonoClassField *local_slots = NULL;
3972 /* local tls data to get locals_slot from a thread */
3975 /* index in the locals_slot array */
3980 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3982 LocalSlotID *sid = user_data;
3983 MonoInternalThread *thread = (MonoInternalThread*)value;
3984 MonoArray *slots_array;
3986 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3987 * it is for the right domain, so we need to check if it is allocated an initialized
3988 * for the current thread.
3990 /*g_print ("handling thread %p\n", thread);*/
3991 if (!thread->static_data || !thread->static_data [sid->idx])
3993 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3994 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3996 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4000 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4008 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4010 g_warning ("local_slots field not found in Thread class");
4014 domain = mono_domain_get ();
4015 mono_domain_lock (domain);
4016 if (domain->special_static_fields)
4017 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4018 mono_domain_unlock (domain);
4021 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4022 sid.offset = GPOINTER_TO_UINT (addr);
4023 sid.offset &= 0x7fffffff;
4024 sid.idx = (sid.offset >> 24) - 1;
4025 mono_threads_lock ();
4026 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4027 mono_threads_unlock ();
4029 /* FIXME: clear the slot for MonoAppContexts, too */
4034 static void CALLBACK dummy_apc (ULONG_PTR param)
4040 * mono_thread_execute_interruption
4042 * Performs the operation that the requested thread state requires (abort,
4045 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4047 LOCK_THREAD (thread);
4049 /* MonoThread::interruption_requested can only be changed with atomics */
4050 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4051 /* this will consume pending APC calls */
4053 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4055 InterlockedDecrement (&thread_interruption_requested);
4057 /* Clear the interrupted flag of the thread so it can wait again */
4058 wapi_clear_interruption ();
4062 if ((thread->state & ThreadState_AbortRequested) != 0) {
4063 UNLOCK_THREAD (thread);
4064 if (thread->abort_exc == NULL) {
4066 * This might be racy, but it has to be called outside the lock
4067 * since it calls managed code.
4069 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4071 return thread->abort_exc;
4073 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4074 self_suspend_internal (thread);
4077 else if ((thread->state & ThreadState_StopRequested) != 0) {
4078 /* FIXME: do this through the JIT? */
4080 UNLOCK_THREAD (thread);
4082 mono_thread_exit ();
4084 } else if (thread->pending_exception) {
4087 exc = thread->pending_exception;
4088 thread->pending_exception = NULL;
4090 UNLOCK_THREAD (thread);
4092 } else if (thread->thread_interrupt_requested) {
4094 thread->thread_interrupt_requested = FALSE;
4095 UNLOCK_THREAD (thread);
4097 return(mono_get_exception_thread_interrupted ());
4100 UNLOCK_THREAD (thread);
4106 * mono_thread_request_interruption
4108 * A signal handler can call this method to request the interruption of a
4109 * thread. The result of the interruption will depend on the current state of
4110 * the thread. If the result is an exception that needs to be throw, it is
4111 * provided as return value.
4114 mono_thread_request_interruption (gboolean running_managed)
4116 MonoInternalThread *thread = mono_thread_internal_current ();
4118 /* The thread may already be stopping */
4123 if (thread->interrupt_on_stop &&
4124 thread->state & ThreadState_StopRequested &&
4125 thread->state & ThreadState_Background)
4129 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4131 InterlockedIncrement (&thread_interruption_requested);
4133 if (!running_managed || is_running_protected_wrapper ()) {
4134 /* Can't stop while in unmanaged code. Increase the global interruption
4135 request count. When exiting the unmanaged method the count will be
4136 checked and the thread will be interrupted. */
4138 if (mono_thread_notify_pending_exc_fn && !running_managed)
4139 /* The JIT will notify the thread about the interruption */
4140 /* This shouldn't take any locks */
4141 mono_thread_notify_pending_exc_fn ();
4143 /* this will awake the thread if it is in WaitForSingleObject
4145 /* Our implementation of this function ignores the func argument */
4147 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4152 return mono_thread_execute_interruption (thread);
4156 /*This function should be called by a thread after it has exited all of
4157 * its handle blocks at interruption time.*/
4159 mono_thread_resume_interruption (void)
4161 MonoInternalThread *thread = mono_thread_internal_current ();
4162 gboolean still_aborting;
4164 /* The thread may already be stopping */
4168 LOCK_THREAD (thread);
4169 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4170 UNLOCK_THREAD (thread);
4172 /*This can happen if the protected block called Thread::ResetAbort*/
4173 if (!still_aborting)
4176 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4178 InterlockedIncrement (&thread_interruption_requested);
4181 wapi_self_interrupt ();
4183 return mono_thread_execute_interruption (thread);
4186 gboolean mono_thread_interruption_requested ()
4188 if (thread_interruption_requested) {
4189 MonoInternalThread *thread = mono_thread_internal_current ();
4190 /* The thread may already be stopping */
4192 return (thread->interruption_requested);
4197 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4199 MonoInternalThread *thread = mono_thread_internal_current ();
4201 /* The thread may already be stopping */
4205 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4206 MonoException* exc = mono_thread_execute_interruption (thread);
4207 if (exc) mono_raise_exception (exc);
4212 * Performs the interruption of the current thread, if one has been requested,
4213 * and the thread is not running a protected wrapper.
4215 void mono_thread_interruption_checkpoint ()
4217 mono_thread_interruption_checkpoint_request (FALSE);
4221 * Performs the interruption of the current thread, if one has been requested.
4223 void mono_thread_force_interruption_checkpoint ()
4225 mono_thread_interruption_checkpoint_request (TRUE);
4229 * mono_thread_get_and_clear_pending_exception:
4231 * Return any pending exceptions for the current thread and clear it as a side effect.
4234 mono_thread_get_and_clear_pending_exception (void)
4236 MonoInternalThread *thread = mono_thread_internal_current ();
4238 /* The thread may already be stopping */
4242 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4243 return mono_thread_execute_interruption (thread);
4246 if (thread->pending_exception) {
4247 MonoException *exc = thread->pending_exception;
4249 thread->pending_exception = NULL;
4257 * mono_set_pending_exception:
4259 * Set the pending exception of the current thread to EXC.
4260 * The exception will be thrown when execution returns to managed code.
4263 mono_set_pending_exception (MonoException *exc)
4265 MonoInternalThread *thread = mono_thread_internal_current ();
4267 /* The thread may already be stopping */
4271 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4273 mono_thread_request_interruption (FALSE);
4277 * mono_thread_interruption_request_flag:
4279 * Returns the address of a flag that will be non-zero if an interruption has
4280 * been requested for a thread. The thread to interrupt may not be the current
4281 * thread, so an additional call to mono_thread_interruption_requested() or
4282 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4285 gint32* mono_thread_interruption_request_flag ()
4287 return &thread_interruption_requested;
4291 mono_thread_init_apartment_state (void)
4294 MonoInternalThread* thread = mono_thread_internal_current ();
4296 /* Positive return value indicates success, either
4297 * S_OK if this is first CoInitialize call, or
4298 * S_FALSE if CoInitialize already called, but with same
4299 * threading model. A negative value indicates failure,
4300 * probably due to trying to change the threading model.
4302 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4303 ? COINIT_APARTMENTTHREADED
4304 : COINIT_MULTITHREADED) < 0) {
4305 thread->apartment_state = ThreadApartmentState_Unknown;
4311 mono_thread_cleanup_apartment_state (void)
4314 MonoInternalThread* thread = mono_thread_internal_current ();
4316 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4323 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4325 LOCK_THREAD (thread);
4326 thread->state |= state;
4327 UNLOCK_THREAD (thread);
4331 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4333 LOCK_THREAD (thread);
4334 thread->state &= ~state;
4335 UNLOCK_THREAD (thread);
4339 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4341 gboolean ret = FALSE;
4343 LOCK_THREAD (thread);
4345 if ((thread->state & test) != 0) {
4349 UNLOCK_THREAD (thread);
4354 //static MonoClassField *execution_context_field;
4357 get_execution_context_addr (void)
4359 MonoDomain *domain = mono_domain_get ();
4360 guint32 offset = domain->execution_context_field_offset;
4363 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4366 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4368 mono_domain_lock (domain);
4369 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4370 mono_domain_unlock (domain);
4373 domain->execution_context_field_offset = offset;
4376 return (MonoObject**) mono_get_special_static_data (offset);
4380 mono_thread_get_execution_context (void)
4382 return *get_execution_context_addr ();
4386 mono_thread_set_execution_context (MonoObject *ec)
4388 *get_execution_context_addr () = ec;
4391 static gboolean has_tls_get = FALSE;
4394 mono_runtime_set_has_tls_get (gboolean val)
4400 mono_runtime_has_tls_get (void)
4406 mono_thread_kill (MonoInternalThread *thread, int signal)
4408 #ifdef __native_client__
4409 /* Workaround pthread_kill abort() in NaCl glibc. */
4413 /* Win32 uses QueueUserAPC and callers of this are guarded */
4414 g_assert_not_reached ();
4416 # ifdef PTHREAD_POINTER_ID
4417 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4419 # ifdef PLATFORM_ANDROID
4420 if (thread->android_tid != 0) {
4422 int old_errno = errno;
4424 ret = tkill ((pid_t) thread->android_tid, signal);
4433 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4435 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4442 self_interrupt_thread (void *_unused)
4444 MonoThreadInfo *info = mono_thread_info_current ();
4445 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4446 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4447 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4448 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4452 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4456 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4460 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4462 MonoJitInfo **dest = data;
4468 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4470 MonoJitInfo *ji = NULL;
4473 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4478 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4481 MonoThreadInfo *info = NULL;
4482 gboolean protected_wrapper;
4483 gboolean running_managed;
4485 if (!mono_thread_info_new_interrupt_enabled ()) {
4486 signal_thread_state_change (thread);
4491 FIXME this is insanely broken, it doesn't cause interruption to happen
4492 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4494 if (thread == mono_thread_internal_current ()) {
4495 /* Do it synchronously */
4496 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4498 mono_raise_exception (exc);
4500 wapi_interrupt_thread (thread->handle);
4505 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4506 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4510 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4511 mono_thread_info_resume (mono_thread_info_get_tid (info));
4515 /*someone is already interrupting it*/
4516 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4517 mono_thread_info_resume (mono_thread_info_get_tid (info));
4520 InterlockedIncrement (&thread_interruption_requested);
4522 ji = mono_thread_info_get_last_managed (info);
4523 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4524 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4526 if (!protected_wrapper && running_managed) {
4527 /*We are in managed code*/
4528 /*Set the thread to call */
4529 if (install_async_abort)
4530 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4531 mono_thread_info_resume (mono_thread_info_get_tid (info));
4533 gpointer interrupt_handle;
4535 * This will cause waits to be broken.
4536 * It will also prevent the thread from entering a wait, so if the thread returns
4537 * from the wait before it receives the abort signal, it will just spin in the wait
4538 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4542 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4544 mono_thread_info_resume (mono_thread_info_get_tid (info));
4546 wapi_finish_interrupt_thread (interrupt_handle);
4549 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4553 transition_to_suspended (MonoInternalThread *thread)
4555 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4556 g_assert (0); /*FIXME we should not reach this */
4557 /*Make sure we balance the suspend count.*/
4558 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4560 thread->state &= ~ThreadState_SuspendRequested;
4561 thread->state |= ThreadState_Suspended;
4562 mono_thread_info_finish_suspend ();
4564 UNLOCK_THREAD (thread);
4568 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4570 if (!mono_thread_info_new_interrupt_enabled ()) {
4571 signal_thread_state_change (thread);
4575 LOCK_THREAD (thread);
4576 if (thread == mono_thread_internal_current ()) {
4577 transition_to_suspended (thread);
4578 mono_thread_info_self_suspend ();
4580 MonoThreadInfo *info;
4582 gboolean protected_wrapper;
4583 gboolean running_managed;
4585 /*A null info usually means the thread is already dead. */
4586 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4587 UNLOCK_THREAD (thread);
4591 ji = mono_thread_info_get_last_managed (info);
4592 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4593 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4595 if (running_managed && !protected_wrapper) {
4596 transition_to_suspended (thread);
4598 gpointer interrupt_handle;
4600 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4601 InterlockedIncrement (&thread_interruption_requested);
4604 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4606 mono_thread_info_resume (mono_thread_info_get_tid (info));
4609 wapi_finish_interrupt_thread (interrupt_handle);
4611 UNLOCK_THREAD (thread);
4616 /*This is called with @thread synch_cs held and it must release it*/
4618 self_suspend_internal (MonoInternalThread *thread)
4620 if (!mono_thread_info_new_interrupt_enabled ()) {
4621 thread->state &= ~ThreadState_SuspendRequested;
4622 thread->state |= ThreadState_Suspended;
4623 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4624 if (thread->suspend_event == NULL) {
4625 UNLOCK_THREAD (thread);
4628 if (thread->suspended_event)
4629 SetEvent (thread->suspended_event);
4631 UNLOCK_THREAD (thread);
4633 if (shutting_down) {
4634 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4639 WaitForSingleObject (thread->suspend_event, INFINITE);
4641 LOCK_THREAD (thread);
4643 CloseHandle (thread->suspend_event);
4644 thread->suspend_event = NULL;
4645 thread->state &= ~ThreadState_Suspended;
4647 /* The thread that requested the resume will have replaced this event
4648 * and will be waiting for it
4650 SetEvent (thread->resume_event);
4652 UNLOCK_THREAD (thread);
4656 transition_to_suspended (thread);
4657 mono_thread_info_self_suspend ();
4660 /*This is called with @thread synch_cs held and it must release it*/
4662 resume_thread_internal (MonoInternalThread *thread)
4664 if (!mono_thread_info_new_interrupt_enabled ()) {
4665 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4666 if (thread->resume_event == NULL) {
4667 UNLOCK_THREAD (thread);
4671 /* Awake the thread */
4672 SetEvent (thread->suspend_event);
4674 UNLOCK_THREAD (thread);
4676 /* Wait for the thread to awake */
4677 WaitForSingleObject (thread->resume_event, INFINITE);
4678 CloseHandle (thread->resume_event);
4679 thread->resume_event = NULL;
4683 UNLOCK_THREAD (thread);
4684 /* Awake the thread */
4685 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4687 LOCK_THREAD (thread);
4688 thread->state &= ~ThreadState_Suspended;
4689 UNLOCK_THREAD (thread);
4695 * mono_thread_is_foreign:
4696 * @thread: the thread to query
4698 * This function allows one to determine if a thread was created by the mono runtime and has
4699 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4701 * Returns: true if @thread was not created by the runtime.
4704 mono_thread_is_foreign (MonoThread *thread)
4706 MonoThreadInfo *info = thread->internal_thread->thread_info;
4707 return info->runtime_thread == FALSE;
4711 * mono_add_joinable_thread:
4713 * Add TID to the list of joinable threads.
4714 * LOCKING: Acquires the threads lock.
4717 mono_threads_add_joinable_thread (gpointer tid)
4721 * We cannot detach from threads because it causes problems like
4722 * 2fd16f60/r114307. So we collect them and join them when
4723 * we have time (in he finalizer thread).
4725 joinable_threads_lock ();
4726 if (!joinable_threads)
4727 joinable_threads = g_hash_table_new (NULL, NULL);
4728 g_hash_table_insert (joinable_threads, tid, tid);
4729 joinable_thread_count ++;
4730 joinable_threads_unlock ();
4732 mono_gc_finalize_notify ();
4737 * mono_threads_join_threads:
4739 * Join all joinable threads. This is called from the finalizer thread.
4740 * LOCKING: Acquires the threads lock.
4743 mono_threads_join_threads (void)
4746 GHashTableIter iter;
4753 if (!joinable_thread_count)
4757 joinable_threads_lock ();
4759 if (g_hash_table_size (joinable_threads)) {
4760 g_hash_table_iter_init (&iter, joinable_threads);
4761 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4762 thread = (pthread_t)tid;
4763 g_hash_table_remove (joinable_threads, key);
4764 joinable_thread_count --;
4767 joinable_threads_unlock ();
4769 if (thread != pthread_self ())
4770 /* This shouldn't block */
4771 pthread_join (thread, NULL);
4782 * Wait for thread TID to exit.
4783 * LOCKING: Acquires the threads lock.
4786 mono_thread_join (gpointer tid)
4790 gboolean found = FALSE;
4792 joinable_threads_lock ();
4793 if (!joinable_threads)
4794 joinable_threads = g_hash_table_new (NULL, NULL);
4795 if (g_hash_table_lookup (joinable_threads, tid)) {
4796 g_hash_table_remove (joinable_threads, tid);
4797 joinable_thread_count --;
4800 joinable_threads_unlock ();
4803 thread = (pthread_t)tid;
4804 pthread_join (thread, NULL);