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)
19 #include <mono/metadata/object.h>
20 #include <mono/metadata/domain-internals.h>
21 #include <mono/metadata/profiler-private.h>
22 #include <mono/metadata/threads.h>
23 #include <mono/metadata/threadpool.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internal.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/hazard-pointer.h>
40 #include <mono/utils/mono-tls.h>
41 #include <mono/utils/atomic.h>
42 #include <mono/utils/mono-memory-model.h>
44 #include <mono/metadata/gc-internal.h>
50 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64)
51 #define USE_TKILL_ON_ANDROID 1
54 #ifdef PLATFORM_ANDROID
57 #ifdef USE_TKILL_ON_ANDROID
58 extern int tkill (pid_t tid, int signal);
62 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
63 #define THREAD_DEBUG(a)
64 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_WAIT_DEBUG(a)
66 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
67 #define LIBGC_DEBUG(a)
69 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
70 #define SPIN_LOCK(i) do { \
71 if (SPIN_TRYLOCK (i)) \
75 #define SPIN_UNLOCK(i) i = 0
77 #define LOCK_THREAD(thread) lock_thread((thread))
78 #define UNLOCK_THREAD(thread) unlock_thread((thread))
80 /* Provide this for systems with glib < 2.6 */
81 #ifndef G_GSIZE_FORMAT
82 # if GLIB_SIZEOF_LONG == 8
83 # define G_GSIZE_FORMAT "lu"
85 # define G_GSIZE_FORMAT "u"
91 guint32 (*func)(void *);
107 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
108 struct _MonoThreadDomainTls {
109 MonoThreadDomainTls *next;
117 MonoThreadDomainTls *freelist;
120 /* Number of cached culture objects in the MonoThread->cached_culture_info array
121 * (per-type): we use the first NUM entries for CultureInfo and the last for
122 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
124 #define NUM_CACHED_CULTURES 4
125 #define CULTURES_START_IDX 0
126 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
128 /* Controls access to the 'threads' hash table */
129 #define mono_threads_lock() mono_mutex_lock (&threads_mutex)
130 #define mono_threads_unlock() mono_mutex_unlock (&threads_mutex)
131 static mono_mutex_t threads_mutex;
133 /* Controls access to context static data */
134 #define mono_contexts_lock() mono_mutex_lock (&contexts_mutex)
135 #define mono_contexts_unlock() mono_mutex_unlock (&contexts_mutex)
136 static mono_mutex_t contexts_mutex;
138 /* Controls access to the 'joinable_threads' hash table */
139 #define joinable_threads_lock() mono_mutex_lock (&joinable_threads_mutex)
140 #define joinable_threads_unlock() mono_mutex_unlock (&joinable_threads_mutex)
141 static mono_mutex_t joinable_threads_mutex;
143 /* Holds current status of static data heap */
144 static StaticDataInfo thread_static_info;
145 static StaticDataInfo context_static_info;
147 /* The hash of existing threads (key is thread ID, value is
148 * MonoInternalThread*) that need joining before exit
150 static MonoGHashTable *threads=NULL;
153 * Threads which are starting up and they are not in the 'threads' hash yet.
154 * When handle_store is called for a thread, it will be removed from this hash table.
155 * Protected by mono_threads_lock ().
157 static MonoGHashTable *threads_starting_up = NULL;
159 /* Maps a MonoThread to its start argument */
160 /* Protected by mono_threads_lock () */
161 static MonoGHashTable *thread_start_args = NULL;
163 /* The TLS key that holds the MonoObject assigned to each thread */
164 static MonoNativeTlsKey current_object_key;
167 /* Protected by the threads lock */
168 static GHashTable *joinable_threads;
169 static int joinable_thread_count;
171 #ifdef MONO_HAVE_FAST_TLS
172 /* we need to use both the Tls* functions and __thread because
173 * the gc needs to see all the threads
175 MONO_FAST_TLS_DECLARE(tls_current_object);
176 #define SET_CURRENT_OBJECT(x) do { \
177 MONO_FAST_TLS_SET (tls_current_object, x); \
178 mono_native_tls_set_value (current_object_key, x); \
180 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
182 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
183 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
186 /* function called at thread start */
187 static MonoThreadStartCB mono_thread_start_cb = NULL;
189 /* function called at thread attach */
190 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
192 /* function called at thread cleanup */
193 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
195 /* function called to notify the runtime about a pending exception on the current thread */
196 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
198 /* The default stack size for each thread */
199 static guint32 default_stacksize = 0;
200 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
202 static void thread_adjust_static_data (MonoInternalThread *thread);
203 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
204 static void mono_init_static_data_info (StaticDataInfo *static_data);
205 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
206 static gboolean mono_thread_resume (MonoInternalThread* thread);
207 static void signal_thread_state_change (MonoInternalThread *thread);
208 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
209 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
210 static void self_suspend_internal (MonoInternalThread *thread);
211 static gboolean resume_thread_internal (MonoInternalThread *thread);
213 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
214 static void ref_stack_destroy (gpointer rs);
216 /* Spin lock for InterlockedXXX 64 bit functions */
217 #define mono_interlocked_lock() mono_mutex_lock (&interlocked_mutex)
218 #define mono_interlocked_unlock() mono_mutex_unlock (&interlocked_mutex)
219 static mono_mutex_t interlocked_mutex;
221 /* global count of thread interruptions requested */
222 static gint32 thread_interruption_requested = 0;
224 /* Event signaled when a thread changes its background mode */
225 static HANDLE background_change_event;
227 static gboolean shutting_down = FALSE;
229 static gint32 managed_thread_id_counter = 0;
232 get_next_managed_thread_id (void)
234 return InterlockedIncrement (&managed_thread_id_counter);
238 mono_thread_get_tls_key (void)
240 return current_object_key;
244 mono_thread_get_tls_offset (void)
247 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
251 static inline MonoNativeThreadId
252 thread_get_tid (MonoInternalThread *thread)
254 /* We store the tid as a guint64 to keep the object layout constant between platforms */
255 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
258 /* handle_store() and handle_remove() manage the array of threads that
259 * still need to be waited for when the main thread exits.
261 * If handle_store() returns FALSE the thread must not be started
262 * because Mono is shutting down.
264 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
266 mono_threads_lock ();
268 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
270 if (threads_starting_up)
271 mono_g_hash_table_remove (threads_starting_up, thread);
273 if (shutting_down && !force_attach) {
274 mono_threads_unlock ();
279 MONO_GC_REGISTER_ROOT_FIXED (threads);
280 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
283 /* We don't need to duplicate thread->handle, because it is
284 * only closed when the thread object is finalized by the GC.
286 g_assert (thread->internal_thread);
287 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
288 thread->internal_thread);
290 mono_threads_unlock ();
295 static gboolean handle_remove(MonoInternalThread *thread)
298 gsize tid = thread->tid;
300 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
302 mono_threads_lock ();
305 /* We have to check whether the thread object for the
306 * tid is still the same in the table because the
307 * thread might have been destroyed and the tid reused
308 * in the meantime, in which case the tid would be in
309 * the table, but with another thread object.
311 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
312 mono_g_hash_table_remove (threads, (gpointer)tid);
321 mono_threads_unlock ();
323 /* Don't close the handle here, wait for the object finalizer
324 * to do it. Otherwise, the following race condition applies:
326 * 1) Thread exits (and handle_remove() closes the handle)
328 * 2) Some other handle is reassigned the same slot
330 * 3) Another thread tries to join the first thread, and
331 * blocks waiting for the reassigned handle to be signalled
332 * (which might never happen). This is possible, because the
333 * thread calling Join() still has a reference to the first
339 static void ensure_synch_cs_set (MonoInternalThread *thread)
341 mono_mutex_t *synch_cs;
343 if (thread->synch_cs != NULL) {
347 synch_cs = g_new0 (mono_mutex_t, 1);
348 mono_mutex_init_recursive (synch_cs);
350 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
351 synch_cs, NULL) != NULL) {
352 /* Another thread must have installed this CS */
353 mono_mutex_destroy (synch_cs);
359 lock_thread (MonoInternalThread *thread)
361 if (!thread->synch_cs)
362 ensure_synch_cs_set (thread);
364 g_assert (thread->synch_cs);
365 mono_mutex_lock (thread->synch_cs);
369 unlock_thread (MonoInternalThread *thread)
371 mono_mutex_unlock (thread->synch_cs);
375 * NOTE: this function can be called also for threads different from the current one:
376 * make sure no code called from it will ever assume it is run on the thread that is
377 * getting cleaned up.
379 static void thread_cleanup (MonoInternalThread *thread)
381 g_assert (thread != NULL);
383 if (thread->abort_state_handle) {
384 mono_gchandle_free (thread->abort_state_handle);
385 thread->abort_state_handle = 0;
387 thread->abort_exc = NULL;
388 thread->current_appcontext = NULL;
391 * This is necessary because otherwise we might have
392 * cross-domain references which will not get cleaned up when
393 * the target domain is unloaded.
395 if (thread->cached_culture_info) {
397 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
398 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
402 * thread->synch_cs can be NULL if this was called after
403 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
404 * This can happen only during shutdown.
405 * The shutting_down flag is not always set, so we can't assert on it.
407 if (thread->synch_cs)
408 LOCK_THREAD (thread);
410 thread->state |= ThreadState_Stopped;
411 thread->state &= ~ThreadState_Background;
413 if (thread->synch_cs)
414 UNLOCK_THREAD (thread);
417 An interruption request has leaked to cleanup. Adjust the global counter.
419 This can happen is the abort source thread finds the abortee (this) thread
420 in unmanaged code. If this thread never trips back to managed code or check
421 the local flag it will be left set and positively unbalance the global counter.
423 Leaving the counter unbalanced will cause a performance degradation since all threads
424 will now keep checking their local flags all the time.
426 if (InterlockedExchange (&thread->interruption_requested, 0))
427 InterlockedDecrement (&thread_interruption_requested);
429 /* if the thread is not in the hash it has been removed already */
430 if (!handle_remove (thread)) {
431 if (thread == mono_thread_internal_current ()) {
432 mono_domain_unset ();
433 mono_memory_barrier ();
435 /* This needs to be called even if handle_remove () fails */
436 if (mono_thread_cleanup_fn)
437 mono_thread_cleanup_fn (thread);
440 mono_release_type_locks (thread);
442 mono_profiler_thread_end (thread->tid);
444 if (thread == mono_thread_internal_current ()) {
446 * This will signal async signal handlers that the thread has exited.
447 * The profiler callback needs this to be set, so it cannot be done earlier.
449 mono_domain_unset ();
450 mono_memory_barrier ();
453 if (thread == mono_thread_internal_current ())
454 mono_thread_pop_appdomain_ref ();
456 thread->cached_culture_info = NULL;
458 mono_free_static_data (thread->static_data, TRUE);
459 thread->static_data = NULL;
460 ref_stack_destroy (thread->appdomain_refs);
461 thread->appdomain_refs = NULL;
463 if (mono_thread_cleanup_fn)
464 mono_thread_cleanup_fn (thread);
466 if (mono_gc_is_moving ()) {
467 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
468 thread->thread_pinning_ref = NULL;
473 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
476 g_assert ((offset & 0x80000000) == 0);
477 offset &= 0x7fffffff;
478 idx = (offset >> 24) - 1;
479 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
483 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
485 static MonoClassField *current_thread_field = NULL;
489 if (!current_thread_field) {
490 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
491 g_assert (current_thread_field);
494 mono_class_vtable (domain, mono_defaults.thread_class);
495 mono_domain_lock (domain);
496 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
497 mono_domain_unlock (domain);
500 return get_thread_static_data (thread, offset);
504 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
506 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
508 g_assert (current->obj.vtable->domain == domain);
510 g_assert (!*current_thread_ptr);
511 *current_thread_ptr = current;
515 create_thread_object (MonoDomain *domain)
517 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
518 return (MonoThread*)mono_gc_alloc_mature (vt);
522 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
524 MonoThread *thread = create_thread_object (domain);
525 MONO_OBJECT_SETREF (thread, internal_thread, internal);
529 static MonoInternalThread*
530 create_internal_thread (void)
532 MonoInternalThread *thread;
535 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
536 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
538 thread->synch_cs = g_new0 (mono_mutex_t, 1);
539 mono_mutex_init_recursive (thread->synch_cs);
541 thread->apartment_state = ThreadApartmentState_Unknown;
542 thread->managed_id = get_next_managed_thread_id ();
543 if (mono_gc_is_moving ()) {
544 thread->thread_pinning_ref = thread;
545 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
552 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
554 MonoDomain *domain = mono_get_root_domain ();
556 if (!candidate || candidate->obj.vtable->domain != domain)
557 candidate = new_thread_with_internal (domain, thread);
558 set_current_thread_for_domain (domain, thread, candidate);
559 g_assert (!thread->root_domain_thread);
560 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
563 static guint32 WINAPI start_wrapper_internal(void *data)
565 MonoThreadInfo *info;
566 StartInfo *start_info = (StartInfo *)data;
567 guint32 (*start_func)(void *);
571 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
574 MonoInternalThread *internal = start_info->obj->internal_thread;
575 MonoObject *start_delegate = start_info->delegate;
576 MonoDomain *domain = start_info->obj->obj.vtable->domain;
578 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
580 /* We can be sure start_info->obj->tid and
581 * start_info->obj->handle have been set, because the thread
582 * was created suspended, and these values were set before the
586 info = mono_thread_info_current ();
588 internal->thread_info = info;
589 internal->small_id = info->small_id;
593 SET_CURRENT_OBJECT (internal);
595 /* Every thread references the appdomain which created it */
596 mono_thread_push_appdomain_ref (domain);
598 if (!mono_domain_set (domain, FALSE)) {
599 /* No point in raising an appdomain_unloaded exception here */
600 /* FIXME: Cleanup here */
601 mono_thread_pop_appdomain_ref ();
605 start_func = start_info->func;
606 start_arg = start_info->start_arg;
608 /* We have to do this here because mono_thread_new_init()
609 requires that root_domain_thread is set up. */
610 thread_adjust_static_data (internal);
611 init_root_domain_thread (internal, start_info->obj);
613 /* This MUST be called before any managed code can be
614 * executed, as it calls the callback function that (for the
615 * jit) sets the lmf marker.
617 mono_thread_new_init (tid, &tid, start_func);
618 internal->stack_ptr = &tid;
620 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
622 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
624 /* On 2.0 profile (and higher), set explicitly since state might have been
626 if (internal->apartment_state == ThreadApartmentState_Unknown)
627 internal->apartment_state = ThreadApartmentState_MTA;
629 mono_thread_init_apartment_state ();
631 if(internal->start_notify!=NULL) {
632 /* Let the thread that called Start() know we're
635 ReleaseSemaphore (internal->start_notify, 1, NULL);
638 mono_threads_lock ();
639 mono_g_hash_table_remove (thread_start_args, start_info->obj);
640 mono_threads_unlock ();
642 mono_thread_set_execution_context (start_info->obj->ec_to_set);
643 start_info->obj->ec_to_set = NULL;
646 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
650 * Call this after calling start_notify, since the profiler callback might want
651 * to lock the thread, and the lock is held by thread_start () which waits for
654 mono_profiler_thread_start (tid);
656 /* if the name was set before starting, we didn't invoke the profiler callback */
657 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
658 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
659 mono_profiler_thread_name (internal->tid, tname);
662 /* start_func is set only for unmanaged start functions */
664 start_func (start_arg);
667 g_assert (start_delegate != NULL);
668 args [0] = start_arg;
669 /* we may want to handle the exception here. See comment below on unhandled exceptions */
670 mono_runtime_delegate_invoke (start_delegate, args, NULL);
673 /* If the thread calls ExitThread at all, this remaining code
674 * will not be executed, but the main thread will eventually
675 * call thread_cleanup() on this thread's behalf.
678 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
680 /* Do any cleanup needed for apartment state. This
681 * cannot be done in thread_cleanup since thread_cleanup could be
682 * called for a thread other than the current thread.
683 * mono_thread_cleanup_apartment_state cleans up apartment
684 * for the current thead */
685 mono_thread_cleanup_apartment_state ();
687 thread_cleanup (internal);
691 /* Remove the reference to the thread object in the TLS data,
692 * so the thread object can be finalized. This won't be
693 * reached if the thread threw an uncaught exception, so those
694 * thread handles will stay referenced :-( (This is due to
695 * missing support for scanning thread-specific data in the
696 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
699 SET_CURRENT_OBJECT (NULL);
704 static guint32 WINAPI start_wrapper(void *data)
708 /* Avoid scanning the frames above this frame during a GC */
709 mono_gc_set_stack_end ((void*)&dummy);
711 return start_wrapper_internal (data);
717 * Common thread creation code.
718 * LOCKING: Acquires the threads lock.
721 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
722 gboolean throw_on_failure)
724 HANDLE thread_handle;
725 MonoNativeThreadId tid;
726 guint32 create_flags;
729 * Join joinable threads to prevent running out of threads since the finalizer
730 * thread might be blocked/backlogged.
732 mono_threads_join_threads ();
734 mono_threads_lock ();
737 mono_threads_unlock ();
741 * The thread start argument may be an object reference, and there is
742 * no ref to keep it alive when the new thread is started but not yet
743 * registered with the collector. So we store it in a GC tracked hash
746 if (thread_start_args == NULL) {
747 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
748 thread_start_args = mono_g_hash_table_new (NULL, NULL);
750 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
751 if (threads_starting_up == NULL) {
752 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
753 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
755 mono_g_hash_table_insert (threads_starting_up, thread, thread);
756 mono_threads_unlock ();
758 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
759 if (!internal->start_notify) {
760 mono_threads_lock ();
761 mono_g_hash_table_remove (threads_starting_up, thread);
762 mono_threads_unlock ();
763 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
769 stack_size = default_stacksize_for_thread (internal);
771 /* Create suspended, so we can do some housekeeping before the thread
774 create_flags = CREATE_SUSPENDED;
775 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
776 stack_size, create_flags, &tid);
777 if (thread_handle == NULL) {
778 /* The thread couldn't be created, so throw an exception */
779 mono_threads_lock ();
780 mono_g_hash_table_remove (threads_starting_up, thread);
781 mono_threads_unlock ();
783 if (throw_on_failure)
784 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
786 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
789 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
791 internal->handle = thread_handle;
792 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
794 internal->threadpool_thread = threadpool_thread;
795 if (threadpool_thread)
796 mono_thread_set_state (internal, ThreadState_Background);
798 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
800 /* Only store the handle when the thread is about to be
801 * launched, to avoid the main thread deadlocking while trying
802 * to clean up a thread that will never be signalled.
804 if (!handle_store (thread, FALSE))
807 mono_thread_info_resume (tid);
809 if (internal->start_notify) {
811 * Wait for the thread to set up its TLS data etc, so
812 * theres no potential race condition if someone tries
813 * to look up the data believing the thread has
816 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
818 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
819 CloseHandle (internal->start_notify);
820 internal->start_notify = NULL;
823 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
828 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
830 if (mono_thread_start_cb) {
831 mono_thread_start_cb (tid, stack_start, func);
835 void mono_threads_set_default_stacksize (guint32 stacksize)
837 default_stacksize = stacksize;
840 guint32 mono_threads_get_default_stacksize (void)
842 return default_stacksize;
846 * mono_thread_create_internal:
850 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
853 MonoInternalThread *internal;
854 StartInfo *start_info;
857 thread = create_thread_object (domain);
858 internal = create_internal_thread ();
859 MONO_OBJECT_SETREF (thread, internal_thread, internal);
861 start_info = g_new0 (StartInfo, 1);
862 start_info->func = func;
863 start_info->obj = thread;
864 start_info->start_arg = arg;
866 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
870 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
871 if (mono_check_corlib_version () == NULL)
872 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
878 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
880 mono_thread_create_internal (domain, func, arg, FALSE, 0);
884 mono_thread_attach (MonoDomain *domain)
886 return mono_thread_attach_full (domain, FALSE);
890 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
892 MonoThreadInfo *info;
893 MonoInternalThread *thread;
894 MonoThread *current_thread;
895 HANDLE thread_handle;
898 if ((thread = mono_thread_internal_current ())) {
899 if (domain != mono_domain_get ())
900 mono_domain_set (domain, TRUE);
901 /* Already attached */
902 return mono_thread_current ();
905 if (!mono_gc_register_thread (&domain)) {
906 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 ());
909 thread = create_internal_thread ();
911 thread_handle = mono_thread_info_open_handle ();
912 g_assert (thread_handle);
914 tid=GetCurrentThreadId ();
916 thread->handle=thread_handle;
918 #ifdef PLATFORM_ANDROID
919 thread->android_tid = (gpointer) gettid ();
921 thread->stack_ptr = &tid;
923 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
925 info = mono_thread_info_current ();
927 thread->thread_info = info;
928 thread->small_id = info->small_id;
930 current_thread = new_thread_with_internal (domain, thread);
932 if (!handle_store (current_thread, force_attach)) {
933 /* Mono is shutting down, so just wait for the end */
938 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
940 SET_CURRENT_OBJECT (thread);
941 mono_domain_set (domain, TRUE);
943 thread_adjust_static_data (thread);
945 init_root_domain_thread (thread, current_thread);
946 if (domain != mono_get_root_domain ())
947 set_current_thread_for_domain (domain, thread, current_thread);
950 if (mono_thread_attach_cb) {
954 mono_thread_info_get_stack_bounds (&staddr, &stsize);
957 mono_thread_attach_cb (tid, &tid);
959 mono_thread_attach_cb (tid, staddr + stsize);
962 // FIXME: Need a separate callback
963 mono_profiler_thread_start (tid);
965 return current_thread;
969 mono_thread_detach_internal (MonoInternalThread *thread)
971 g_return_if_fail (thread != NULL);
973 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
975 thread_cleanup (thread);
977 SET_CURRENT_OBJECT (NULL);
978 mono_domain_unset ();
980 /* Don't need to CloseHandle this thread, even though we took a
981 * reference in mono_thread_attach (), because the GC will do it
982 * when the Thread object is finalised.
987 mono_thread_detach (MonoThread *thread)
990 mono_thread_detach_internal (thread->internal_thread);
994 * mono_thread_detach_if_exiting:
996 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
997 * This should be used at the end of embedding code which calls into managed code, and which
998 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1001 mono_thread_detach_if_exiting (void)
1003 if (mono_thread_info_is_exiting ()) {
1004 MonoInternalThread *thread;
1006 thread = mono_thread_internal_current ();
1008 mono_thread_detach_internal (thread);
1009 mono_thread_info_detach ();
1017 MonoInternalThread *thread = mono_thread_internal_current ();
1019 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1021 thread_cleanup (thread);
1022 SET_CURRENT_OBJECT (NULL);
1023 mono_domain_unset ();
1025 /* we could add a callback here for embedders to use. */
1026 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1027 exit (mono_environment_exitcode_get ());
1028 mono_thread_info_exit ();
1032 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1034 MonoInternalThread *internal = create_internal_thread ();
1036 internal->state = ThreadState_Unstarted;
1038 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1042 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this,
1045 StartInfo *start_info;
1046 MonoInternalThread *internal;
1049 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1051 if (!this->internal_thread)
1052 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1053 internal = this->internal_thread;
1055 LOCK_THREAD (internal);
1057 if ((internal->state & ThreadState_Unstarted) == 0) {
1058 UNLOCK_THREAD (internal);
1059 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1063 if ((internal->state & ThreadState_Aborted) != 0) {
1064 UNLOCK_THREAD (internal);
1067 /* This is freed in start_wrapper */
1068 start_info = g_new0 (StartInfo, 1);
1069 start_info->func = NULL;
1070 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1071 start_info->delegate = start;
1072 start_info->obj = this;
1073 g_assert (this->obj.vtable->domain == mono_domain_get ());
1075 res = create_thread (this, internal, start_info, FALSE, 0, FALSE);
1077 UNLOCK_THREAD (internal);
1081 internal->state &= ~ThreadState_Unstarted;
1083 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1085 UNLOCK_THREAD (internal);
1086 return internal->handle;
1090 * This is called from the finalizer of the internal thread object.
1093 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1095 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1098 * Since threads keep a reference to their thread object while running, by the time this function is called,
1099 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1100 * when thread_cleanup () can be called after this.
1103 CloseHandle (thread);
1105 if (this->synch_cs) {
1106 mono_mutex_t *synch_cs = this->synch_cs;
1107 this->synch_cs = NULL;
1108 mono_mutex_destroy (synch_cs);
1113 void *name = this->name;
1119 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1122 MonoInternalThread *thread = mono_thread_internal_current ();
1124 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1126 mono_thread_current_check_pending_interrupt ();
1129 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1131 res = SleepEx(ms,TRUE);
1133 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1135 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1136 MonoException* exc = mono_thread_execute_interruption (thread);
1138 mono_raise_exception (exc);
1150 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1155 ves_icall_System_Threading_Thread_GetDomainID (void)
1157 return mono_domain_get()->domain_id;
1161 ves_icall_System_Threading_Thread_Yield (void)
1163 return mono_thread_info_yield ();
1167 * mono_thread_get_name:
1169 * Return the name of the thread. NAME_LEN is set to the length of the name.
1170 * Return NULL if the thread has no name. The returned memory is owned by the
1174 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1178 LOCK_THREAD (this_obj);
1180 if (!this_obj->name) {
1184 *name_len = this_obj->name_len;
1185 res = g_new (gunichar2, this_obj->name_len);
1186 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1189 UNLOCK_THREAD (this_obj);
1195 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1199 LOCK_THREAD (this_obj);
1201 if (!this_obj->name)
1204 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1206 UNLOCK_THREAD (this_obj);
1212 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1214 LOCK_THREAD (this_obj);
1216 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1217 UNLOCK_THREAD (this_obj);
1219 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1222 if (this_obj->name) {
1223 g_free (this_obj->name);
1224 this_obj->name_len = 0;
1227 this_obj->name = g_new (gunichar2, mono_string_length (name));
1228 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1229 this_obj->name_len = mono_string_length (name);
1232 this_obj->name = NULL;
1235 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1237 UNLOCK_THREAD (this_obj);
1239 if (this_obj->name && this_obj->tid) {
1240 char *tname = mono_string_to_utf8 (name);
1241 mono_profiler_thread_name (this_obj->tid, tname);
1242 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1248 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1250 mono_thread_set_name_internal (this_obj, name, TRUE);
1253 /* If the array is already in the requested domain, we just return it,
1254 otherwise we return a copy in that domain. */
1256 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1263 if (mono_object_domain (arr) == domain)
1266 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1267 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1272 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1274 return byte_array_to_domain (arr, mono_get_root_domain ());
1278 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1280 return byte_array_to_domain (arr, mono_domain_get ());
1284 mono_thread_current (void)
1286 MonoDomain *domain = mono_domain_get ();
1287 MonoInternalThread *internal = mono_thread_internal_current ();
1288 MonoThread **current_thread_ptr;
1290 g_assert (internal);
1291 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1293 if (!*current_thread_ptr) {
1294 g_assert (domain != mono_get_root_domain ());
1295 *current_thread_ptr = new_thread_with_internal (domain, internal);
1297 return *current_thread_ptr;
1301 mono_thread_internal_current (void)
1303 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1304 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1308 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1309 int ms, HANDLE thread)
1311 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1314 mono_thread_current_check_pending_interrupt ();
1318 if ((this->state & ThreadState_Unstarted) != 0) {
1319 UNLOCK_THREAD (this);
1321 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1325 UNLOCK_THREAD (this);
1330 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1332 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1334 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1336 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1338 if(ret==WAIT_OBJECT_0) {
1339 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1344 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1350 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1358 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1361 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1363 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1365 if (ret != WAIT_IO_COMPLETION)
1368 exc = mono_thread_execute_interruption (thread);
1370 mono_raise_exception (exc);
1375 /* Re-calculate ms according to the time passed */
1376 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1377 if (diff_ms >= ms) {
1381 wait = ms - diff_ms;
1387 /* FIXME: exitContext isnt documented */
1388 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1394 MonoObject *waitHandle;
1395 MonoInternalThread *thread = mono_thread_internal_current ();
1397 /* Do this WaitSleepJoin check before creating objects */
1398 mono_thread_current_check_pending_interrupt ();
1400 /* We fail in managed if the array has more than 64 elements */
1401 numhandles = (guint32)mono_array_length(mono_handles);
1402 handles = g_new0(HANDLE, numhandles);
1404 for(i = 0; i < numhandles; i++) {
1405 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1406 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1413 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1415 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1417 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1421 if(ret==WAIT_FAILED) {
1422 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1424 } else if(ret==WAIT_TIMEOUT) {
1425 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1432 /* FIXME: exitContext isnt documented */
1433 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1435 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1436 uintptr_t numhandles;
1439 MonoObject *waitHandle;
1440 MonoInternalThread *thread = mono_thread_internal_current ();
1442 /* Do this WaitSleepJoin check before creating objects */
1443 mono_thread_current_check_pending_interrupt ();
1445 numhandles = mono_array_length(mono_handles);
1446 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1449 for(i = 0; i < numhandles; i++) {
1450 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1451 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1458 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1460 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1462 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1464 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1467 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1469 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1470 return ret - WAIT_OBJECT_0;
1472 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1473 return ret - WAIT_ABANDONED_0;
1480 /* FIXME: exitContext isnt documented */
1481 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1484 MonoInternalThread *thread = mono_thread_internal_current ();
1486 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1492 mono_thread_current_check_pending_interrupt ();
1494 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1496 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1498 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1500 if(ret==WAIT_FAILED) {
1501 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1503 } else if(ret==WAIT_TIMEOUT) {
1504 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1512 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1515 MonoInternalThread *thread = mono_thread_internal_current ();
1520 mono_thread_current_check_pending_interrupt ();
1522 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1524 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1526 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1528 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1531 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1538 mutex = CreateMutex (NULL, owned, NULL);
1540 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1542 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1550 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1551 return(ReleaseMutex (handle));
1554 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1560 *error = ERROR_SUCCESS;
1562 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1564 *error = GetLastError ();
1571 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1578 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1580 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1581 mono_string_chars (name));
1583 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1591 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1595 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1600 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1604 *error = ERROR_SUCCESS;
1606 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1608 *error = GetLastError ();
1614 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1621 event = CreateEvent (NULL, manual, initial, NULL);
1623 event = CreateEvent (NULL, manual, initial,
1624 mono_string_chars (name));
1626 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1634 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1635 return (SetEvent(handle));
1638 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1639 return (ResetEvent(handle));
1643 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1644 CloseHandle (handle);
1647 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1653 *error = ERROR_SUCCESS;
1655 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1657 *error = GetLastError ();
1663 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1665 return InterlockedIncrement (location);
1668 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1670 #if SIZEOF_VOID_P == 4
1671 if (G_UNLIKELY ((size_t)location & 0x7)) {
1673 mono_interlocked_lock ();
1676 mono_interlocked_unlock ();
1680 return InterlockedIncrement64 (location);
1683 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1685 return InterlockedDecrement(location);
1688 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1690 #if SIZEOF_VOID_P == 4
1691 if (G_UNLIKELY ((size_t)location & 0x7)) {
1693 mono_interlocked_lock ();
1696 mono_interlocked_unlock ();
1700 return InterlockedDecrement64 (location);
1703 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1705 return InterlockedExchange(location, value);
1708 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1711 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1712 mono_gc_wbarrier_generic_nostore (location);
1716 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1718 return InterlockedExchangePointer(location, value);
1721 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1723 IntFloatUnion val, ret;
1726 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1732 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1734 #if SIZEOF_VOID_P == 4
1735 if (G_UNLIKELY ((size_t)location & 0x7)) {
1737 mono_interlocked_lock ();
1740 mono_interlocked_unlock ();
1744 return InterlockedExchange64 (location, value);
1748 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1750 LongDoubleUnion val, ret;
1753 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1758 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1760 return InterlockedCompareExchange(location, value, comparand);
1763 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1766 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1767 mono_gc_wbarrier_generic_nostore (location);
1771 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1773 return InterlockedCompareExchangePointer(location, value, comparand);
1776 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1778 IntFloatUnion val, ret, cmp;
1781 cmp.fval = comparand;
1782 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1788 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1790 #if SIZEOF_VOID_P == 8
1791 LongDoubleUnion val, comp, ret;
1794 comp.fval = comparand;
1795 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1801 mono_interlocked_lock ();
1803 if (old == comparand)
1805 mono_interlocked_unlock ();
1812 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1814 #if SIZEOF_VOID_P == 4
1815 if (G_UNLIKELY ((size_t)location & 0x7)) {
1817 mono_interlocked_lock ();
1819 if (old == comparand)
1821 mono_interlocked_unlock ();
1825 return InterlockedCompareExchange64 (location, value, comparand);
1829 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1832 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1833 mono_gc_wbarrier_generic_nostore (location);
1838 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1841 res = InterlockedExchangePointer ((gpointer *)location, value);
1842 mono_gc_wbarrier_generic_nostore (location);
1847 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1849 return InterlockedAdd (location, value);
1853 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1855 #if SIZEOF_VOID_P == 4
1856 if (G_UNLIKELY ((size_t)location & 0x7)) {
1858 mono_interlocked_lock ();
1861 mono_interlocked_unlock ();
1865 return InterlockedAdd64 (location, value);
1869 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1871 #if SIZEOF_VOID_P == 4
1872 if (G_UNLIKELY ((size_t)location & 0x7)) {
1874 mono_interlocked_lock ();
1876 mono_interlocked_unlock ();
1880 return InterlockedRead64 (location);
1884 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1886 mono_memory_barrier ();
1890 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1892 mono_thread_clr_state (this, state);
1894 if (state & ThreadState_Background) {
1895 /* If the thread changes the background mode, the main thread has to
1896 * be notified, since it has to rebuild the list of threads to
1899 SetEvent (background_change_event);
1904 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1906 mono_thread_set_state (this, state);
1908 if (state & ThreadState_Background) {
1909 /* If the thread changes the background mode, the main thread has to
1910 * be notified, since it has to rebuild the list of threads to
1913 SetEvent (background_change_event);
1918 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1924 state = this->state;
1926 UNLOCK_THREAD (this);
1931 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1933 MonoInternalThread *current;
1938 current = mono_thread_internal_current ();
1940 this->thread_interrupt_requested = TRUE;
1941 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1943 UNLOCK_THREAD (this);
1946 abort_thread_internal (this, TRUE, FALSE);
1950 void mono_thread_current_check_pending_interrupt ()
1952 MonoInternalThread *thread = mono_thread_internal_current ();
1953 gboolean throw = FALSE;
1955 LOCK_THREAD (thread);
1957 if (thread->thread_interrupt_requested) {
1959 thread->thread_interrupt_requested = FALSE;
1962 UNLOCK_THREAD (thread);
1965 mono_raise_exception (mono_get_exception_thread_interrupted ());
1970 mono_thread_get_abort_signal (void)
1974 #elif defined(PLATFORM_ANDROID)
1976 #elif !defined (SIGRTMIN)
1981 #endif /* SIGUSR1 */
1983 static int abort_signum = -1;
1985 if (abort_signum != -1)
1986 return abort_signum;
1987 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1988 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1989 struct sigaction sinfo;
1990 sigaction (i, NULL, &sinfo);
1991 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
1996 /* fallback to the old way */
1998 #endif /* HOST_WIN32 */
2002 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2004 MonoException* exc = mono_thread_request_interruption (FALSE);
2005 if (exc) mono_raise_exception (exc);
2007 #endif /* HOST_WIN32 */
2010 * signal_thread_state_change
2012 * Tells the thread that his state has changed and it has to enter the new
2013 * state as soon as possible.
2015 static void signal_thread_state_change (MonoInternalThread *thread)
2018 gpointer wait_handle;
2021 if (thread == mono_thread_internal_current ()) {
2022 /* Do it synchronously */
2023 MonoException *exc = mono_thread_request_interruption (FALSE);
2025 mono_raise_exception (exc);
2029 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, (ULONG_PTR)NULL);
2032 * This will cause waits to be broken.
2033 * It will also prevent the thread from entering a wait, so if the thread returns
2034 * from the wait before it receives the abort signal, it will just spin in the wait
2035 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2038 wait_handle = mono_thread_info_prepare_interrupt (thread->handle);
2040 /* fixme: store the state somewhere */
2041 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2043 mono_thread_info_finish_interrupt (wait_handle);
2044 #endif /* HOST_WIN32 */
2048 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2050 LOCK_THREAD (thread);
2052 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2053 (thread->state & ThreadState_StopRequested) != 0 ||
2054 (thread->state & ThreadState_Stopped) != 0)
2056 UNLOCK_THREAD (thread);
2060 if ((thread->state & ThreadState_Unstarted) != 0) {
2061 thread->state |= ThreadState_Aborted;
2062 UNLOCK_THREAD (thread);
2066 thread->state |= ThreadState_AbortRequested;
2067 if (thread->abort_state_handle)
2068 mono_gchandle_free (thread->abort_state_handle);
2070 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2071 g_assert (thread->abort_state_handle);
2073 thread->abort_state_handle = 0;
2075 thread->abort_exc = NULL;
2078 * abort_exc is set in mono_thread_execute_interruption(),
2079 * triggered by the call to signal_thread_state_change(),
2080 * below. There's a point between where we have
2081 * abort_state_handle set, but abort_exc NULL, but that's not
2085 UNLOCK_THREAD (thread);
2087 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2089 /* During shutdown, we can't wait for other threads */
2091 /* Make sure the thread is awake */
2092 mono_thread_resume (thread);
2094 abort_thread_internal (thread, TRUE, TRUE);
2098 ves_icall_System_Threading_Thread_ResetAbort (void)
2100 MonoInternalThread *thread = mono_thread_internal_current ();
2101 gboolean was_aborting;
2103 LOCK_THREAD (thread);
2104 was_aborting = thread->state & ThreadState_AbortRequested;
2105 thread->state &= ~ThreadState_AbortRequested;
2106 UNLOCK_THREAD (thread);
2108 if (!was_aborting) {
2109 const char *msg = "Unable to reset abort because no abort was requested";
2110 mono_raise_exception (mono_get_exception_thread_state (msg));
2112 thread->abort_exc = NULL;
2113 if (thread->abort_state_handle) {
2114 mono_gchandle_free (thread->abort_state_handle);
2115 /* This is actually not necessary - the handle
2116 only counts if the exception is set */
2117 thread->abort_state_handle = 0;
2122 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2124 LOCK_THREAD (thread);
2126 thread->state &= ~ThreadState_AbortRequested;
2128 if (thread->abort_exc) {
2129 thread->abort_exc = NULL;
2130 if (thread->abort_state_handle) {
2131 mono_gchandle_free (thread->abort_state_handle);
2132 /* This is actually not necessary - the handle
2133 only counts if the exception is set */
2134 thread->abort_state_handle = 0;
2138 UNLOCK_THREAD (thread);
2142 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2144 MonoInternalThread *thread = this->internal_thread;
2145 MonoObject *state, *deserialized = NULL, *exc;
2148 if (!thread->abort_state_handle)
2151 state = mono_gchandle_get_target (thread->abort_state_handle);
2154 domain = mono_domain_get ();
2155 if (mono_object_domain (state) == domain)
2158 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2160 if (!deserialized) {
2161 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2163 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2164 mono_raise_exception (invalid_op_exc);
2167 return deserialized;
2171 mono_thread_suspend (MonoInternalThread *thread)
2173 LOCK_THREAD (thread);
2175 if ((thread->state & ThreadState_Unstarted) != 0 ||
2176 (thread->state & ThreadState_Aborted) != 0 ||
2177 (thread->state & ThreadState_Stopped) != 0)
2179 UNLOCK_THREAD (thread);
2183 if ((thread->state & ThreadState_Suspended) != 0 ||
2184 (thread->state & ThreadState_SuspendRequested) != 0 ||
2185 (thread->state & ThreadState_StopRequested) != 0)
2187 UNLOCK_THREAD (thread);
2191 thread->state |= ThreadState_SuspendRequested;
2193 UNLOCK_THREAD (thread);
2195 suspend_thread_internal (thread, FALSE);
2200 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2202 if (!mono_thread_suspend (thread))
2203 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2207 mono_thread_resume (MonoInternalThread *thread)
2209 LOCK_THREAD (thread);
2211 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2212 thread->state &= ~ThreadState_SuspendRequested;
2213 UNLOCK_THREAD (thread);
2217 if ((thread->state & ThreadState_Suspended) == 0 ||
2218 (thread->state & ThreadState_Unstarted) != 0 ||
2219 (thread->state & ThreadState_Aborted) != 0 ||
2220 (thread->state & ThreadState_Stopped) != 0)
2222 UNLOCK_THREAD (thread);
2226 return resume_thread_internal (thread);
2230 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2232 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2233 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2237 mono_threads_is_critical_method (MonoMethod *method)
2239 switch (method->wrapper_type) {
2240 case MONO_WRAPPER_RUNTIME_INVOKE:
2241 case MONO_WRAPPER_XDOMAIN_INVOKE:
2242 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2249 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2254 if (mono_threads_is_critical_method (m)) {
2255 *((gboolean*)data) = TRUE;
2262 is_running_protected_wrapper (void)
2264 gboolean found = FALSE;
2265 mono_stack_walk (find_wrapper, &found);
2269 void mono_thread_internal_stop (MonoInternalThread *thread)
2271 LOCK_THREAD (thread);
2273 if ((thread->state & ThreadState_StopRequested) != 0 ||
2274 (thread->state & ThreadState_Stopped) != 0)
2276 UNLOCK_THREAD (thread);
2280 /* Make sure the thread is awake */
2281 mono_thread_resume (thread);
2283 thread->state |= ThreadState_StopRequested;
2284 thread->state &= ~ThreadState_AbortRequested;
2286 UNLOCK_THREAD (thread);
2288 abort_thread_internal (thread, TRUE, TRUE);
2291 void mono_thread_stop (MonoThread *thread)
2293 mono_thread_internal_stop (thread->internal_thread);
2297 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2300 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2305 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2308 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2313 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2316 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2321 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2324 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2329 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2332 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2333 return (void *) tmp;
2337 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2339 volatile MonoObject *tmp;
2340 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2341 return (MonoObject *) tmp;
2345 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2348 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2353 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2356 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2361 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2363 return InterlockedRead8 (ptr);
2367 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2369 return InterlockedRead16 (ptr);
2373 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2375 return InterlockedRead (ptr);
2379 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2381 #if SIZEOF_VOID_P == 4
2382 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2384 mono_interlocked_lock ();
2385 val = *(gint64*)ptr;
2386 mono_interlocked_unlock ();
2390 return InterlockedRead64 (ptr);
2394 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2396 return InterlockedReadPointer (ptr);
2400 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2404 #if SIZEOF_VOID_P == 4
2405 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2407 mono_interlocked_lock ();
2408 val = *(double*)ptr;
2409 mono_interlocked_unlock ();
2414 u.ival = InterlockedRead64 (ptr);
2420 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2424 u.ival = InterlockedRead (ptr);
2430 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2432 return InterlockedReadPointer (ptr);
2436 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2438 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2442 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2444 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2448 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2450 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2454 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2456 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2460 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2462 mono_atomic_store_release ((volatile void **) ptr, value);
2466 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2468 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2472 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2474 mono_atomic_store_release ((volatile double *) ptr, value);
2478 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2480 mono_atomic_store_release ((volatile float *) ptr, value);
2484 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2486 InterlockedWrite8 (ptr, value);
2490 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2492 InterlockedWrite16 (ptr, value);
2496 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2498 InterlockedWrite (ptr, value);
2502 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2504 #if SIZEOF_VOID_P == 4
2505 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2506 mono_interlocked_lock ();
2507 *(gint64*)ptr = value;
2508 mono_interlocked_unlock ();
2513 InterlockedWrite64 (ptr, value);
2517 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2519 InterlockedWritePointer (ptr, value);
2523 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2527 #if SIZEOF_VOID_P == 4
2528 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2529 mono_interlocked_lock ();
2530 *(double*)ptr = value;
2531 mono_interlocked_unlock ();
2538 InterlockedWrite64 (ptr, u.ival);
2542 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2548 InterlockedWrite (ptr, u.ival);
2552 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2554 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2558 mono_thread_init_tls (void)
2560 MONO_FAST_TLS_INIT (tls_current_object);
2561 mono_native_tls_alloc (¤t_object_key, NULL);
2564 void mono_thread_init (MonoThreadStartCB start_cb,
2565 MonoThreadAttachCB attach_cb)
2567 mono_mutex_init_recursive(&threads_mutex);
2568 mono_mutex_init_recursive(&interlocked_mutex);
2569 mono_mutex_init_recursive(&contexts_mutex);
2570 mono_mutex_init_recursive(&joinable_threads_mutex);
2572 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2573 g_assert(background_change_event != NULL);
2575 mono_init_static_data_info (&thread_static_info);
2576 mono_init_static_data_info (&context_static_info);
2578 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2580 mono_thread_start_cb = start_cb;
2581 mono_thread_attach_cb = attach_cb;
2583 /* Get a pseudo handle to the current process. This is just a
2584 * kludge so that wapi can build a process handle if needed.
2585 * As a pseudo handle is returned, we don't need to clean
2588 GetCurrentProcess ();
2591 void mono_thread_cleanup (void)
2593 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2594 MonoThreadInfo *info;
2596 /* The main thread must abandon any held mutexes (particularly
2597 * important for named mutexes as they are shared across
2598 * processes, see bug 74680.) This will happen when the
2599 * thread exits, but if it's not running in a subthread it
2600 * won't exit in time.
2602 info = mono_thread_info_current ();
2603 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2607 /* This stuff needs more testing, it seems one of these
2608 * critical sections can be locked when mono_thread_cleanup is
2611 mono_mutex_destroy (&threads_mutex);
2612 mono_mutex_destroy (&interlocked_mutex);
2613 mono_mutex_destroy (&contexts_mutex);
2614 mono_mutex_destroy (&delayed_free_table_mutex);
2615 mono_mutex_destroy (&small_id_mutex);
2616 CloseHandle (background_change_event);
2619 mono_native_tls_free (current_object_key);
2623 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2625 mono_thread_cleanup_fn = func;
2629 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2631 thread->internal_thread->manage_callback = func;
2634 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2636 mono_thread_notify_pending_exc_fn = func;
2640 static void print_tids (gpointer key, gpointer value, gpointer user)
2642 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2643 * sizeof(uint) and a cast to uint would overflow
2645 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2646 * print this as a pointer.
2648 g_message ("Waiting for: %p", key);
2653 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2654 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2658 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2662 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2664 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2666 if(ret==WAIT_FAILED) {
2667 /* See the comment in build_wait_tids() */
2668 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2672 for(i=0; i<wait->num; i++)
2673 CloseHandle (wait->handles[i]);
2675 if (ret == WAIT_TIMEOUT)
2678 for(i=0; i<wait->num; i++) {
2679 gsize tid = wait->threads[i]->tid;
2682 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2683 * it can still run io-layer etc. code. So wait for it to really exit.
2684 * FIXME: This won't join threads which are not in the joinable_hash yet.
2686 mono_thread_join ((gpointer)tid);
2688 mono_threads_lock ();
2689 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2690 /* This thread must have been killed, because
2691 * it hasn't cleaned itself up. (It's just
2692 * possible that the thread exited before the
2693 * parent thread had a chance to store the
2694 * handle, and now there is another pointer to
2695 * the already-exited thread stored. In this
2696 * case, we'll just get two
2697 * mono_profiler_thread_end() calls for the
2701 mono_threads_unlock ();
2702 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2703 thread_cleanup (wait->threads[i]);
2705 mono_threads_unlock ();
2710 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2712 guint32 i, ret, count;
2714 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2716 /* Add the thread state change event, so it wakes up if a thread changes
2717 * to background mode.
2720 if (count < MAXIMUM_WAIT_OBJECTS) {
2721 wait->handles [count] = background_change_event;
2725 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2727 if(ret==WAIT_FAILED) {
2728 /* See the comment in build_wait_tids() */
2729 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2733 for(i=0; i<wait->num; i++)
2734 CloseHandle (wait->handles[i]);
2736 if (ret == WAIT_TIMEOUT)
2739 if (ret < wait->num) {
2740 gsize tid = wait->threads[ret]->tid;
2741 mono_threads_lock ();
2742 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2743 /* See comment in wait_for_tids about thread cleanup */
2744 mono_threads_unlock ();
2745 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2746 thread_cleanup (wait->threads [ret]);
2748 mono_threads_unlock ();
2752 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2754 struct wait_data *wait=(struct wait_data *)user;
2756 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2758 MonoInternalThread *thread=(MonoInternalThread *)value;
2760 /* Ignore background threads, we abort them later */
2761 /* Do not lock here since it is not needed and the caller holds threads_lock */
2762 if (thread->state & ThreadState_Background) {
2763 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2764 return; /* just leave, ignore */
2767 if (mono_gc_is_finalizer_internal_thread (thread)) {
2768 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2772 if (thread == mono_thread_internal_current ()) {
2773 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2777 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2778 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2782 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2783 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2787 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2788 if (handle == NULL) {
2789 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2793 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2794 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2795 wait->handles[wait->num]=handle;
2796 wait->threads[wait->num]=thread;
2799 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2801 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2806 /* Just ignore the rest, we can't do anything with
2813 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2815 struct wait_data *wait=(struct wait_data *)user;
2816 gsize self = GetCurrentThreadId ();
2817 MonoInternalThread *thread = value;
2820 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2823 /* The finalizer thread is not a background thread */
2824 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2825 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2827 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2831 /* printf ("A: %d\n", wait->num); */
2832 wait->handles[wait->num]=thread->handle;
2833 wait->threads[wait->num]=thread;
2836 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2837 mono_thread_internal_stop (thread);
2841 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2845 * mono_threads_set_shutting_down:
2847 * Is called by a thread that wants to shut down Mono. If the runtime is already
2848 * shutting down, the calling thread is suspended/stopped, and this function never
2852 mono_threads_set_shutting_down (void)
2854 MonoInternalThread *current_thread = mono_thread_internal_current ();
2856 mono_threads_lock ();
2858 if (shutting_down) {
2859 mono_threads_unlock ();
2861 /* Make sure we're properly suspended/stopped */
2863 LOCK_THREAD (current_thread);
2865 if ((current_thread->state & ThreadState_SuspendRequested) ||
2866 (current_thread->state & ThreadState_AbortRequested) ||
2867 (current_thread->state & ThreadState_StopRequested)) {
2868 UNLOCK_THREAD (current_thread);
2869 mono_thread_execute_interruption (current_thread);
2871 current_thread->state |= ThreadState_Stopped;
2872 UNLOCK_THREAD (current_thread);
2875 /*since we're killing the thread, unset the current domain.*/
2876 mono_domain_unset ();
2878 /* Wake up other threads potentially waiting for us */
2879 mono_thread_info_exit ();
2881 shutting_down = TRUE;
2883 /* Not really a background state change, but this will
2884 * interrupt the main thread if it is waiting for all
2885 * the other threads.
2887 SetEvent (background_change_event);
2889 mono_threads_unlock ();
2893 void mono_thread_manage (void)
2895 struct wait_data wait_data;
2896 struct wait_data *wait = &wait_data;
2898 memset (wait, 0, sizeof (struct wait_data));
2899 /* join each thread that's still running */
2900 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2902 mono_threads_lock ();
2904 THREAD_DEBUG (g_message("%s: No threads", __func__));
2905 mono_threads_unlock ();
2908 mono_threads_unlock ();
2911 mono_threads_lock ();
2912 if (shutting_down) {
2913 /* somebody else is shutting down */
2914 mono_threads_unlock ();
2917 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2918 mono_g_hash_table_foreach (threads, print_tids, NULL));
2920 ResetEvent (background_change_event);
2922 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2923 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2924 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2925 mono_threads_unlock ();
2927 /* Something to wait for */
2928 wait_for_tids_or_state_change (wait, INFINITE);
2930 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2931 } while(wait->num>0);
2933 /* Mono is shutting down, so just wait for the end */
2934 if (!mono_runtime_try_shutdown ()) {
2935 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2936 mono_thread_suspend (mono_thread_internal_current ());
2937 mono_thread_execute_interruption (mono_thread_internal_current ());
2941 * Remove everything but the finalizer thread and self.
2942 * Also abort all the background threads
2945 mono_threads_lock ();
2948 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2949 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2950 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2952 mono_threads_unlock ();
2954 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2956 /* Something to wait for */
2957 wait_for_tids (wait, INFINITE);
2959 } while (wait->num > 0);
2962 * give the subthreads a chance to really quit (this is mainly needed
2963 * to get correct user and system times from getrusage/wait/time(1)).
2964 * This could be removed if we avoid pthread_detach() and use pthread_join().
2966 mono_thread_info_yield ();
2969 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2971 MonoInternalThread *thread=(MonoInternalThread *)value;
2973 if(thread->tid != (gsize)user) {
2974 /*TerminateThread (thread->handle, -1);*/
2978 void mono_thread_abort_all_other_threads (void)
2980 gsize self = GetCurrentThreadId ();
2982 mono_threads_lock ();
2983 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2984 mono_g_hash_table_size (threads));
2985 mono_g_hash_table_foreach (threads, print_tids, NULL));
2987 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2989 mono_threads_unlock ();
2993 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2995 MonoInternalThread *thread = (MonoInternalThread*)value;
2996 struct wait_data *wait = (struct wait_data*)user_data;
3000 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3002 * This needs no locking.
3004 if ((thread->state & ThreadState_Suspended) != 0 ||
3005 (thread->state & ThreadState_Stopped) != 0)
3008 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3009 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3013 wait->handles [wait->num] = handle;
3014 wait->threads [wait->num] = thread;
3020 * mono_thread_suspend_all_other_threads:
3022 * Suspend all managed threads except the finalizer thread and this thread. It is
3023 * not possible to resume them later.
3025 void mono_thread_suspend_all_other_threads (void)
3027 struct wait_data wait_data;
3028 struct wait_data *wait = &wait_data;
3030 gsize self = GetCurrentThreadId ();
3032 guint32 eventidx = 0;
3033 gboolean starting, finished;
3035 memset (wait, 0, sizeof (struct wait_data));
3037 * The other threads could be in an arbitrary state at this point, i.e.
3038 * they could be starting up, shutting down etc. This means that there could be
3039 * threads which are not even in the threads hash table yet.
3043 * First we set a barrier which will be checked by all threads before they
3044 * are added to the threads hash table, and they will exit if the flag is set.
3045 * This ensures that no threads could be added to the hash later.
3046 * We will use shutting_down as the barrier for now.
3048 g_assert (shutting_down);
3051 * We make multiple calls to WaitForMultipleObjects since:
3052 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3053 * - some threads could exit without becoming suspended
3058 * Make a copy of the hashtable since we can't do anything with
3059 * threads while threads_mutex is held.
3062 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3063 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3064 mono_threads_lock ();
3065 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3066 mono_threads_unlock ();
3068 events = g_new0 (gpointer, wait->num);
3070 /* Get the suspended events that we'll be waiting for */
3071 for (i = 0; i < wait->num; ++i) {
3072 MonoInternalThread *thread = wait->threads [i];
3073 gboolean signal_suspend = FALSE;
3075 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3076 //CloseHandle (wait->handles [i]);
3077 wait->threads [i] = NULL; /* ignore this thread in next loop */
3081 LOCK_THREAD (thread);
3083 if (thread->suspended_event == NULL) {
3084 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3085 if (thread->suspended_event == NULL) {
3086 /* Forget this one and go on to the next */
3087 UNLOCK_THREAD (thread);
3092 if ((thread->state & ThreadState_Suspended) != 0 ||
3093 (thread->state & ThreadState_StopRequested) != 0 ||
3094 (thread->state & ThreadState_Stopped) != 0) {
3095 UNLOCK_THREAD (thread);
3096 CloseHandle (wait->handles [i]);
3097 wait->threads [i] = NULL; /* ignore this thread in next loop */
3101 if ((thread->state & ThreadState_SuspendRequested) == 0)
3102 signal_suspend = TRUE;
3104 events [eventidx++] = thread->suspended_event;
3106 /* Convert abort requests into suspend requests */
3107 if ((thread->state & ThreadState_AbortRequested) != 0)
3108 thread->state &= ~ThreadState_AbortRequested;
3110 thread->state |= ThreadState_SuspendRequested;
3112 UNLOCK_THREAD (thread);
3114 /* Signal the thread to suspend */
3115 if (mono_thread_info_new_interrupt_enabled ())
3116 suspend_thread_internal (thread, TRUE);
3117 else if (signal_suspend)
3118 signal_thread_state_change (thread);
3121 /*Only wait on the suspend event if we are using the old path */
3122 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3123 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3124 for (i = 0; i < wait->num; ++i) {
3125 MonoInternalThread *thread = wait->threads [i];
3130 LOCK_THREAD (thread);
3131 if ((thread->state & ThreadState_Suspended) != 0) {
3132 CloseHandle (thread->suspended_event);
3133 thread->suspended_event = NULL;
3135 UNLOCK_THREAD (thread);
3139 if (eventidx <= 0) {
3141 * If there are threads which are starting up, we wait until they
3142 * are suspended when they try to register in the threads hash.
3143 * This is guaranteed to finish, since the threads which can create new
3144 * threads get suspended after a while.
3145 * FIXME: The finalizer thread can still create new threads.
3147 mono_threads_lock ();
3148 if (threads_starting_up)
3149 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3152 mono_threads_unlock ();
3164 collect_threads (gpointer key, gpointer value, gpointer user_data)
3166 MonoInternalThread *thread = (MonoInternalThread*)value;
3167 struct wait_data *wait = (struct wait_data*)user_data;
3170 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3171 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3175 wait->handles [wait->num] = handle;
3176 wait->threads [wait->num] = thread;
3181 static gboolean thread_dump_requested;
3183 static G_GNUC_UNUSED gboolean
3184 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3186 GString *p = (GString*)data;
3187 MonoMethod *method = NULL;
3189 method = mono_jit_info_get_method (frame->ji);
3192 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3193 g_string_append_printf (p, " %s\n", location);
3196 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3202 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3204 GString* text = g_string_new (0);
3206 GError *error = NULL;
3209 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3211 g_string_append_printf (text, "\n\"%s\"", name);
3214 else if (thread->threadpool_thread)
3215 g_string_append (text, "\n\"<threadpool thread>\"");
3217 g_string_append (text, "\n\"<unnamed thread>\"");
3220 /* This no longer works with remote unwinding */
3222 wapi_desc = wapi_current_thread_desc ();
3223 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3228 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3229 mono_thread_info_finish_suspend_and_resume (info);
3231 fprintf (stdout, "%s", text->str);
3233 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3234 OutputDebugStringA(text->str);
3237 g_string_free (text, TRUE);
3242 dump_thread (gpointer key, gpointer value, gpointer user)
3244 MonoInternalThread *thread = (MonoInternalThread *)value;
3245 MonoThreadInfo *info;
3247 if (thread == mono_thread_internal_current ())
3251 FIXME This still can hang if we stop a thread during malloc.
3252 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3253 that takes a callback and runs it with the target suspended.
3254 We probably should loop a bit around trying to get it to either managed code
3257 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3262 print_thread_dump (thread, info);
3266 mono_threads_perform_thread_dump (void)
3268 if (!thread_dump_requested)
3271 printf ("Full thread dump:\n");
3273 /* We take the loader lock and the root domain lock as to increase our odds of not deadlocking if
3274 something needs then in the process.
3276 mono_loader_lock ();
3277 mono_domain_lock (mono_get_root_domain ());
3279 mono_threads_lock ();
3280 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3281 mono_threads_unlock ();
3283 mono_domain_unlock (mono_get_root_domain ());
3284 mono_loader_unlock ();
3286 thread_dump_requested = FALSE;
3290 * mono_threads_request_thread_dump:
3292 * Ask all threads except the current to print their stacktrace to stdout.
3295 mono_threads_request_thread_dump (void)
3297 struct wait_data wait_data;
3298 struct wait_data *wait = &wait_data;
3301 /*The new thread dump code runs out of the finalizer thread. */
3302 if (mono_thread_info_new_interrupt_enabled ()) {
3303 thread_dump_requested = TRUE;
3304 mono_gc_finalize_notify ();
3309 memset (wait, 0, sizeof (struct wait_data));
3312 * Make a copy of the hashtable since we can't do anything with
3313 * threads while threads_mutex is held.
3315 mono_threads_lock ();
3316 mono_g_hash_table_foreach (threads, collect_threads, wait);
3317 mono_threads_unlock ();
3319 for (i = 0; i < wait->num; ++i) {
3320 MonoInternalThread *thread = wait->threads [i];
3322 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3323 (thread != mono_thread_internal_current ()) &&
3324 !thread->thread_dump_requested) {
3325 thread->thread_dump_requested = TRUE;
3327 signal_thread_state_change (thread);
3330 CloseHandle (wait->handles [i]);
3336 gint allocated; /* +1 so that refs [allocated] == NULL */
3340 typedef struct ref_stack RefStack;
3343 ref_stack_new (gint initial_size)
3347 initial_size = MAX (initial_size, 16) + 1;
3348 rs = g_new0 (RefStack, 1);
3349 rs->refs = g_new0 (gpointer, initial_size);
3350 rs->allocated = initial_size;
3355 ref_stack_destroy (gpointer ptr)
3366 ref_stack_push (RefStack *rs, gpointer ptr)
3368 g_assert (rs != NULL);
3370 if (rs->bottom >= rs->allocated) {
3371 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3372 rs->allocated <<= 1;
3373 rs->refs [rs->allocated] = NULL;
3375 rs->refs [rs->bottom++] = ptr;
3379 ref_stack_pop (RefStack *rs)
3381 if (rs == NULL || rs->bottom == 0)
3385 rs->refs [rs->bottom] = NULL;
3389 ref_stack_find (RefStack *rs, gpointer ptr)
3396 for (refs = rs->refs; refs && *refs; refs++) {
3404 * mono_thread_push_appdomain_ref:
3406 * Register that the current thread may have references to objects in domain
3407 * @domain on its stack. Each call to this function should be paired with a
3408 * call to pop_appdomain_ref.
3411 mono_thread_push_appdomain_ref (MonoDomain *domain)
3413 MonoInternalThread *thread = mono_thread_internal_current ();
3416 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3417 SPIN_LOCK (thread->lock_thread_id);
3418 if (thread->appdomain_refs == NULL)
3419 thread->appdomain_refs = ref_stack_new (16);
3420 ref_stack_push (thread->appdomain_refs, domain);
3421 SPIN_UNLOCK (thread->lock_thread_id);
3426 mono_thread_pop_appdomain_ref (void)
3428 MonoInternalThread *thread = mono_thread_internal_current ();
3431 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3432 SPIN_LOCK (thread->lock_thread_id);
3433 ref_stack_pop (thread->appdomain_refs);
3434 SPIN_UNLOCK (thread->lock_thread_id);
3439 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3442 SPIN_LOCK (thread->lock_thread_id);
3443 res = ref_stack_find (thread->appdomain_refs, domain);
3444 SPIN_UNLOCK (thread->lock_thread_id);
3449 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3451 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3454 typedef struct abort_appdomain_data {
3455 struct wait_data wait;
3457 } abort_appdomain_data;
3460 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3462 MonoInternalThread *thread = (MonoInternalThread*)value;
3463 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3464 MonoDomain *domain = data->domain;
3466 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3467 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3469 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3470 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3473 data->wait.handles [data->wait.num] = handle;
3474 data->wait.threads [data->wait.num] = thread;
3477 /* Just ignore the rest, we can't do anything with
3485 * mono_threads_abort_appdomain_threads:
3487 * Abort threads which has references to the given appdomain.
3490 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3492 #ifdef __native_client__
3496 abort_appdomain_data user_data;
3498 int orig_timeout = timeout;
3501 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3503 start_time = mono_msec_ticks ();
3505 mono_threads_lock ();
3507 user_data.domain = domain;
3508 user_data.wait.num = 0;
3509 /* This shouldn't take any locks */
3510 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3511 mono_threads_unlock ();
3513 if (user_data.wait.num > 0) {
3514 /* Abort the threads outside the threads lock */
3515 for (i = 0; i < user_data.wait.num; ++i)
3516 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3519 * We should wait for the threads either to abort, or to leave the
3520 * domain. We can't do the latter, so we wait with a timeout.
3522 wait_for_tids (&user_data.wait, 100);
3525 /* Update remaining time */
3526 timeout -= mono_msec_ticks () - start_time;
3527 start_time = mono_msec_ticks ();
3529 if (orig_timeout != -1 && timeout < 0)
3532 while (user_data.wait.num > 0);
3534 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3540 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3542 MonoInternalThread *thread = (MonoInternalThread*)value;
3543 MonoDomain *domain = (MonoDomain*)user_data;
3546 /* No locking needed here */
3547 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3549 if (thread->cached_culture_info) {
3550 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3551 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3552 if (obj && obj->vtable->domain == domain)
3553 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3559 * mono_threads_clear_cached_culture:
3561 * Clear the cached_current_culture from all threads if it is in the
3565 mono_threads_clear_cached_culture (MonoDomain *domain)
3567 mono_threads_lock ();
3568 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3569 mono_threads_unlock ();
3573 * mono_thread_get_undeniable_exception:
3575 * Return an exception which needs to be raised when leaving a catch clause.
3576 * This is used for undeniable exception propagation.
3579 mono_thread_get_undeniable_exception (void)
3581 MonoInternalThread *thread = mono_thread_internal_current ();
3583 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3585 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3586 * exception if the thread no longer references a dying appdomain.
3588 thread->abort_exc->trace_ips = NULL;
3589 thread->abort_exc->stack_trace = NULL;
3590 return thread->abort_exc;
3596 #if MONO_SMALL_CONFIG
3597 #define NUM_STATIC_DATA_IDX 4
3598 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3602 #define NUM_STATIC_DATA_IDX 8
3603 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3604 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3608 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3611 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3614 gpointer *static_data = addr;
3615 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3618 if (!static_data [i])
3620 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3621 ptr = static_data [i];
3622 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3623 uintptr_t bmap = static_reference_bitmaps [i][j];
3626 if ((bmap & 1) && *p) {
3627 mark_func (p, gc_data);
3637 * mono_alloc_static_data
3639 * Allocate memory blocks for storing threads or context static data
3642 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3644 guint idx = (offset >> 24) - 1;
3647 gpointer* static_data = *static_data_ptr;
3649 static void* tls_desc = NULL;
3650 if (mono_gc_user_markers_supported () && !tls_desc)
3651 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3652 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3653 *static_data_ptr = static_data;
3654 static_data [0] = static_data;
3657 for (i = 1; i <= idx; ++i) {
3658 if (static_data [i])
3660 if (mono_gc_user_markers_supported () && threadlocal)
3661 static_data [i] = g_malloc0 (static_data_size [i]);
3663 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3668 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3671 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3672 gpointer p = static_data [i];
3676 * At this point, the static data pointer array is still registered with the
3677 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3678 * data. Freeing the individual arrays without first nulling their slots
3679 * would make it possible for mark_tls_slots() to encounter a pointer to
3680 * such an already freed array. See bug #13813.
3682 static_data [i] = NULL;
3683 mono_memory_write_barrier ();
3684 if (mono_gc_user_markers_supported () && threadlocal)
3687 mono_gc_free_fixed (p);
3689 mono_gc_free_fixed (static_data);
3693 * mono_init_static_data_info
3695 * Initializes static data counters
3697 static void mono_init_static_data_info (StaticDataInfo *static_data)
3699 static_data->idx = 0;
3700 static_data->offset = 0;
3701 static_data->freelist = NULL;
3705 * mono_alloc_static_data_slot
3707 * Generates an offset for static data. static_data contains the counters
3708 * used to generate it.
3711 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3715 if (!static_data->idx && !static_data->offset) {
3717 * we use the first chunk of the first allocation also as
3718 * an array for the rest of the data
3720 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3722 static_data->offset += align - 1;
3723 static_data->offset &= ~(align - 1);
3724 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3725 static_data->idx ++;
3726 g_assert (size <= static_data_size [static_data->idx]);
3727 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3728 static_data->offset = 0;
3730 offset = static_data->offset | ((static_data->idx + 1) << 24);
3731 static_data->offset += size;
3736 * ensure thread static fields already allocated are valid for thread
3737 * This function is called when a thread is created or on thread attach.
3740 thread_adjust_static_data (MonoInternalThread *thread)
3744 mono_threads_lock ();
3745 if (thread_static_info.offset || thread_static_info.idx > 0) {
3746 /* get the current allocated size */
3747 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3748 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3750 mono_threads_unlock ();
3754 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3756 MonoInternalThread *thread = value;
3757 guint32 offset = GPOINTER_TO_UINT (user);
3759 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3762 static MonoThreadDomainTls*
3763 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3765 MonoThreadDomainTls* prev = NULL;
3766 MonoThreadDomainTls* tmp = static_data->freelist;
3768 if (tmp->size == size) {
3770 prev->next = tmp->next;
3772 static_data->freelist = tmp->next;
3781 #if SIZEOF_VOID_P == 4
3788 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3791 int idx = (offset >> 24) - 1;
3793 if (!static_reference_bitmaps [idx])
3794 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3795 rb = static_reference_bitmaps [idx];
3797 offset /= sizeof (gpointer);
3798 /* offset is now the bitmap offset */
3799 for (i = 0; i < numbits; ++i) {
3800 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3801 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (ONE_P << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3806 clear_reference_bitmap (guint32 offset, guint32 size)
3808 int idx = (offset >> 24) - 1;
3810 rb = static_reference_bitmaps [idx];
3812 offset /= sizeof (gpointer);
3813 size /= sizeof (gpointer);
3815 /* offset is now the bitmap offset */
3816 for (; offset < size; ++offset)
3817 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3821 * The offset for a special static variable is composed of three parts:
3822 * a bit that indicates the type of static data (0:thread, 1:context),
3823 * an index in the array of chunks of memory for the thread (thread->static_data)
3824 * and an offset in that chunk of mem. This allows allocating less memory in the
3829 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3832 if (static_type == SPECIAL_STATIC_THREAD) {
3833 MonoThreadDomainTls *item;
3834 mono_threads_lock ();
3835 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3836 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3838 offset = item->offset;
3841 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3843 update_tls_reference_bitmap (offset, bitmap, numbits);
3844 /* This can be called during startup */
3845 if (threads != NULL)
3846 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3847 mono_threads_unlock ();
3849 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3850 mono_contexts_lock ();
3851 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3852 mono_contexts_unlock ();
3853 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3859 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3861 /* The high bit means either thread (0) or static (1) data. */
3863 guint32 static_type = (offset & 0x80000000);
3866 offset &= 0x7fffffff;
3867 idx = (offset >> 24) - 1;
3869 if (static_type == 0) {
3870 return get_thread_static_data (thread, offset);
3872 /* Allocate static data block under demand, since we don't have a list
3875 MonoAppContext *context = mono_context_get ();
3876 if (!context->static_data || !context->static_data [idx]) {
3877 mono_contexts_lock ();
3878 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3879 mono_contexts_unlock ();
3881 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3886 mono_get_special_static_data (guint32 offset)
3888 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3897 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3899 MonoInternalThread *thread = value;
3900 TlsOffsetSize *data = user;
3901 int idx = (data->offset >> 24) - 1;
3904 if (!thread->static_data || !thread->static_data [idx])
3906 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3907 mono_gc_bzero_atomic (ptr, data->size);
3911 do_free_special_slot (guint32 offset, guint32 size)
3913 guint32 static_type = (offset & 0x80000000);
3914 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3915 if (static_type == 0) {
3917 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3918 data.offset = offset & 0x7fffffff;
3920 clear_reference_bitmap (data.offset, data.size);
3921 if (threads != NULL)
3922 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3923 item->offset = offset;
3926 if (!mono_runtime_is_shutting_down ()) {
3927 item->next = thread_static_info.freelist;
3928 thread_static_info.freelist = item;
3930 /* We could be called during shutdown after mono_thread_cleanup () is called */
3934 /* FIXME: free context static data as well */
3939 do_free_special (gpointer key, gpointer value, gpointer data)
3941 MonoClassField *field = key;
3942 guint32 offset = GPOINTER_TO_UINT (value);
3945 size = mono_type_size (field->type, &align);
3946 do_free_special_slot (offset, size);
3950 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3952 mono_threads_lock ();
3953 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3954 mono_threads_unlock ();
3958 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3960 mono_threads_lock ();
3961 do_free_special_slot (offset, size);
3962 mono_threads_unlock ();
3966 * allocates room in the thread local area for storing an instance of the struct type
3967 * the allocation is kept track of in domain->tlsrec_list.
3970 mono_thread_alloc_tls (MonoReflectionType *type)
3972 MonoDomain *domain = mono_domain_get ();
3974 MonoTlsDataRecord *tlsrec;
3977 gsize default_bitmap [4] = {0};
3978 uint32_t tls_offset;
3982 klass = mono_class_from_mono_type (type->type);
3983 /* TlsDatum is a struct, so we subtract the object header size offset */
3984 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3985 size = mono_type_size (type->type, &align);
3986 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3987 if (bitmap != default_bitmap)
3989 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3990 tlsrec->tls_offset = tls_offset;
3991 tlsrec->size = size;
3992 mono_domain_lock (domain);
3993 tlsrec->next = domain->tlsrec_list;
3994 domain->tlsrec_list = tlsrec;
3995 mono_domain_unlock (domain);
4000 destroy_tls (MonoDomain *domain, uint32_t tls_offset)
4002 MonoTlsDataRecord *prev = NULL;
4003 MonoTlsDataRecord *cur;
4006 mono_domain_lock (domain);
4007 cur = domain->tlsrec_list;
4009 if (cur->tls_offset == tls_offset) {
4011 prev->next = cur->next;
4013 domain->tlsrec_list = cur->next;
4021 mono_domain_unlock (domain);
4023 mono_special_static_data_free_slot (tls_offset, size);
4027 mono_thread_destroy_tls (uint32_t tls_offset)
4029 destroy_tls (mono_domain_get (), tls_offset);
4033 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4036 mono_thread_destroy_domain_tls (MonoDomain *domain)
4038 while (domain->tlsrec_list)
4039 destroy_tls (domain, domain->tlsrec_list->tls_offset);
4042 static MonoClassField *local_slots = NULL;
4045 /* local tls data to get locals_slot from a thread */
4048 /* index in the locals_slot array */
4053 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4055 LocalSlotID *sid = user_data;
4056 MonoInternalThread *thread = (MonoInternalThread*)value;
4057 MonoArray *slots_array;
4059 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4060 * it is for the right domain, so we need to check if it is allocated an initialized
4061 * for the current thread.
4063 /*g_print ("handling thread %p\n", thread);*/
4064 if (!thread->static_data || !thread->static_data [sid->idx])
4066 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4067 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4069 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4073 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4081 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4083 g_warning ("local_slots field not found in Thread class");
4087 domain = mono_domain_get ();
4088 mono_domain_lock (domain);
4089 if (domain->special_static_fields)
4090 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4091 mono_domain_unlock (domain);
4094 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4095 sid.offset = GPOINTER_TO_UINT (addr);
4096 sid.offset &= 0x7fffffff;
4097 sid.idx = (sid.offset >> 24) - 1;
4098 mono_threads_lock ();
4099 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4100 mono_threads_unlock ();
4102 /* FIXME: clear the slot for MonoAppContexts, too */
4107 static void CALLBACK dummy_apc (ULONG_PTR param)
4113 * mono_thread_execute_interruption
4115 * Performs the operation that the requested thread state requires (abort,
4118 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4120 LOCK_THREAD (thread);
4122 /* MonoThread::interruption_requested can only be changed with atomics */
4123 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4124 /* this will consume pending APC calls */
4126 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4128 InterlockedDecrement (&thread_interruption_requested);
4129 /* Clear the interrupted flag of the thread so it can wait again */
4130 mono_thread_info_clear_interruption ();
4133 if ((thread->state & ThreadState_AbortRequested) != 0) {
4134 UNLOCK_THREAD (thread);
4135 if (thread->abort_exc == NULL) {
4137 * This might be racy, but it has to be called outside the lock
4138 * since it calls managed code.
4140 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4142 return thread->abort_exc;
4144 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4145 self_suspend_internal (thread);
4148 else if ((thread->state & ThreadState_StopRequested) != 0) {
4149 /* FIXME: do this through the JIT? */
4151 UNLOCK_THREAD (thread);
4153 mono_thread_exit ();
4155 } else if (thread->pending_exception) {
4158 exc = thread->pending_exception;
4159 thread->pending_exception = NULL;
4161 UNLOCK_THREAD (thread);
4163 } else if (thread->thread_interrupt_requested) {
4165 thread->thread_interrupt_requested = FALSE;
4166 UNLOCK_THREAD (thread);
4168 return(mono_get_exception_thread_interrupted ());
4171 UNLOCK_THREAD (thread);
4177 * mono_thread_request_interruption
4179 * A signal handler can call this method to request the interruption of a
4180 * thread. The result of the interruption will depend on the current state of
4181 * the thread. If the result is an exception that needs to be throw, it is
4182 * provided as return value.
4185 mono_thread_request_interruption (gboolean running_managed)
4187 MonoInternalThread *thread = mono_thread_internal_current ();
4189 /* The thread may already be stopping */
4194 if (thread->interrupt_on_stop &&
4195 thread->state & ThreadState_StopRequested &&
4196 thread->state & ThreadState_Background)
4200 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4202 InterlockedIncrement (&thread_interruption_requested);
4204 if (!running_managed || is_running_protected_wrapper ()) {
4205 /* Can't stop while in unmanaged code. Increase the global interruption
4206 request count. When exiting the unmanaged method the count will be
4207 checked and the thread will be interrupted. */
4209 if (mono_thread_notify_pending_exc_fn && !running_managed)
4210 /* The JIT will notify the thread about the interruption */
4211 /* This shouldn't take any locks */
4212 mono_thread_notify_pending_exc_fn (NULL);
4214 /* this will awake the thread if it is in WaitForSingleObject
4216 /* Our implementation of this function ignores the func argument */
4218 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4220 mono_thread_info_self_interrupt ();
4225 return mono_thread_execute_interruption (thread);
4229 /*This function should be called by a thread after it has exited all of
4230 * its handle blocks at interruption time.*/
4232 mono_thread_resume_interruption (void)
4234 MonoInternalThread *thread = mono_thread_internal_current ();
4235 gboolean still_aborting;
4237 /* The thread may already be stopping */
4241 LOCK_THREAD (thread);
4242 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4243 UNLOCK_THREAD (thread);
4245 /*This can happen if the protected block called Thread::ResetAbort*/
4246 if (!still_aborting)
4249 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4251 InterlockedIncrement (&thread_interruption_requested);
4253 mono_thread_info_self_interrupt ();
4255 return mono_thread_execute_interruption (thread);
4258 gboolean mono_thread_interruption_requested ()
4260 if (thread_interruption_requested) {
4261 MonoInternalThread *thread = mono_thread_internal_current ();
4262 /* The thread may already be stopping */
4264 return (thread->interruption_requested);
4269 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4271 MonoInternalThread *thread = mono_thread_internal_current ();
4273 /* The thread may already be stopping */
4277 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4278 MonoException* exc = mono_thread_execute_interruption (thread);
4279 if (exc) mono_raise_exception (exc);
4284 * Performs the interruption of the current thread, if one has been requested,
4285 * and the thread is not running a protected wrapper.
4287 void mono_thread_interruption_checkpoint ()
4289 mono_thread_interruption_checkpoint_request (FALSE);
4293 * Performs the interruption of the current thread, if one has been requested.
4295 void mono_thread_force_interruption_checkpoint ()
4297 mono_thread_interruption_checkpoint_request (TRUE);
4301 * mono_thread_get_and_clear_pending_exception:
4303 * Return any pending exceptions for the current thread and clear it as a side effect.
4306 mono_thread_get_and_clear_pending_exception (void)
4308 MonoInternalThread *thread = mono_thread_internal_current ();
4310 /* The thread may already be stopping */
4314 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4315 return mono_thread_execute_interruption (thread);
4318 if (thread->pending_exception) {
4319 MonoException *exc = thread->pending_exception;
4321 thread->pending_exception = NULL;
4329 * mono_set_pending_exception:
4331 * Set the pending exception of the current thread to EXC.
4332 * The exception will be thrown when execution returns to managed code.
4335 mono_set_pending_exception (MonoException *exc)
4337 MonoInternalThread *thread = mono_thread_internal_current ();
4339 /* The thread may already be stopping */
4343 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4345 mono_thread_request_interruption (FALSE);
4349 * mono_thread_interruption_request_flag:
4351 * Returns the address of a flag that will be non-zero if an interruption has
4352 * been requested for a thread. The thread to interrupt may not be the current
4353 * thread, so an additional call to mono_thread_interruption_requested() or
4354 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4357 gint32* mono_thread_interruption_request_flag ()
4359 return &thread_interruption_requested;
4363 mono_thread_init_apartment_state (void)
4366 MonoInternalThread* thread = mono_thread_internal_current ();
4368 /* Positive return value indicates success, either
4369 * S_OK if this is first CoInitialize call, or
4370 * S_FALSE if CoInitialize already called, but with same
4371 * threading model. A negative value indicates failure,
4372 * probably due to trying to change the threading model.
4374 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4375 ? COINIT_APARTMENTTHREADED
4376 : COINIT_MULTITHREADED) < 0) {
4377 thread->apartment_state = ThreadApartmentState_Unknown;
4383 mono_thread_cleanup_apartment_state (void)
4386 MonoInternalThread* thread = mono_thread_internal_current ();
4388 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4395 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4397 LOCK_THREAD (thread);
4398 thread->state |= state;
4399 UNLOCK_THREAD (thread);
4403 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4405 LOCK_THREAD (thread);
4406 thread->state &= ~state;
4407 UNLOCK_THREAD (thread);
4411 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4413 gboolean ret = FALSE;
4415 LOCK_THREAD (thread);
4417 if ((thread->state & test) != 0) {
4421 UNLOCK_THREAD (thread);
4426 //static MonoClassField *execution_context_field;
4429 get_execution_context_addr (void)
4431 MonoDomain *domain = mono_domain_get ();
4432 guint32 offset = domain->execution_context_field_offset;
4435 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4438 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4440 mono_domain_lock (domain);
4441 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4442 mono_domain_unlock (domain);
4445 domain->execution_context_field_offset = offset;
4448 return (MonoObject**) mono_get_special_static_data (offset);
4452 mono_thread_get_execution_context (void)
4454 return *get_execution_context_addr ();
4458 mono_thread_set_execution_context (MonoObject *ec)
4460 *get_execution_context_addr () = ec;
4463 static gboolean has_tls_get = FALSE;
4466 mono_runtime_set_has_tls_get (gboolean val)
4472 mono_runtime_has_tls_get (void)
4478 mono_thread_kill (MonoInternalThread *thread, int signal)
4480 #ifdef __native_client__
4481 /* Workaround pthread_kill abort() in NaCl glibc. */
4485 /* Win32 uses QueueUserAPC and callers of this are guarded */
4486 g_assert_not_reached ();
4488 # ifdef PTHREAD_POINTER_ID
4489 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4491 # ifdef USE_TKILL_ON_ANDROID
4492 if (thread->android_tid != 0) {
4494 int old_errno = errno;
4496 ret = tkill ((pid_t) thread->android_tid, signal);
4505 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4507 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4514 self_interrupt_thread (void *_unused)
4516 MonoThreadInfo *info = mono_thread_info_current ();
4517 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4518 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4519 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4520 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4524 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4528 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4532 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4534 MonoJitInfo **dest = data;
4540 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4542 MonoJitInfo *ji = NULL;
4545 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4550 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4553 MonoThreadInfo *info = NULL;
4554 gboolean protected_wrapper;
4555 gboolean running_managed;
4557 if (!mono_thread_info_new_interrupt_enabled ()) {
4558 signal_thread_state_change (thread);
4563 FIXME this is insanely broken, it doesn't cause interruption to happen
4564 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4566 if (thread == mono_thread_internal_current ()) {
4567 /* Do it synchronously */
4568 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4570 mono_raise_exception (exc);
4571 mono_thread_info_interrupt (thread->handle);
4575 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4576 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4580 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4581 mono_thread_info_finish_suspend_and_resume (info);
4585 /*someone is already interrupting it*/
4586 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4587 mono_thread_info_finish_suspend_and_resume (info);
4590 InterlockedIncrement (&thread_interruption_requested);
4592 ji = mono_thread_info_get_last_managed (info);
4593 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4594 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4596 if (!protected_wrapper && running_managed) {
4597 /*We are in managed code*/
4598 /*Set the thread to call */
4599 if (install_async_abort)
4600 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4601 mono_thread_info_finish_suspend_and_resume (info);
4604 * This will cause waits to be broken.
4605 * It will also prevent the thread from entering a wait, so if the thread returns
4606 * from the wait before it receives the abort signal, it will just spin in the wait
4607 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4610 gpointer interrupt_handle;
4612 if (mono_thread_notify_pending_exc_fn)
4613 /* The JIT will notify the thread about the interruption */
4614 mono_thread_notify_pending_exc_fn (info);
4616 interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4617 mono_thread_info_finish_suspend_and_resume (info);
4618 mono_thread_info_finish_interrupt (interrupt_handle);
4620 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4624 transition_to_suspended (MonoInternalThread *thread, MonoThreadInfo *info)
4626 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4627 g_assert (0); /*FIXME we should not reach this */
4628 /*Make sure we balance the suspend count.*/
4630 mono_thread_info_finish_suspend_and_resume (info);
4632 thread->state &= ~ThreadState_SuspendRequested;
4633 thread->state |= ThreadState_Suspended;
4635 mono_thread_info_finish_suspend (info);
4637 UNLOCK_THREAD (thread);
4641 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4643 if (!mono_thread_info_new_interrupt_enabled ()) {
4644 signal_thread_state_change (thread);
4648 LOCK_THREAD (thread);
4649 if (thread == mono_thread_internal_current ()) {
4650 transition_to_suspended (thread, NULL);
4651 mono_thread_info_self_suspend ();
4653 MonoThreadInfo *info;
4655 gboolean protected_wrapper;
4656 gboolean running_managed;
4658 /*A null info usually means the thread is already dead. */
4659 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4660 UNLOCK_THREAD (thread);
4664 ji = mono_thread_info_get_last_managed (info);
4665 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4666 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4668 if (running_managed && !protected_wrapper) {
4669 transition_to_suspended (thread, info);
4671 gpointer interrupt_handle;
4673 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4674 InterlockedIncrement (&thread_interruption_requested);
4676 interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4677 if (mono_thread_notify_pending_exc_fn && !running_managed)
4678 /* The JIT will notify the thread about the interruption */
4679 mono_thread_notify_pending_exc_fn (info);
4680 mono_thread_info_finish_suspend_and_resume (info);
4682 mono_thread_info_finish_interrupt (interrupt_handle);
4683 UNLOCK_THREAD (thread);
4688 /*This is called with @thread synch_cs held and it must release it*/
4690 self_suspend_internal (MonoInternalThread *thread)
4692 if (!mono_thread_info_new_interrupt_enabled ()) {
4693 thread->state &= ~ThreadState_SuspendRequested;
4694 thread->state |= ThreadState_Suspended;
4695 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4696 if (thread->suspend_event == NULL) {
4697 UNLOCK_THREAD (thread);
4700 if (thread->suspended_event)
4701 SetEvent (thread->suspended_event);
4703 UNLOCK_THREAD (thread);
4705 if (shutting_down) {
4706 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4711 WaitForSingleObject (thread->suspend_event, INFINITE);
4713 LOCK_THREAD (thread);
4715 CloseHandle (thread->suspend_event);
4716 thread->suspend_event = NULL;
4717 thread->state &= ~ThreadState_Suspended;
4719 /* The thread that requested the resume will have replaced this event
4720 * and will be waiting for it
4722 SetEvent (thread->resume_event);
4724 UNLOCK_THREAD (thread);
4728 transition_to_suspended (thread, NULL);
4729 mono_thread_info_self_suspend ();
4732 /*This is called with @thread synch_cs held and it must release it*/
4734 resume_thread_internal (MonoInternalThread *thread)
4736 if (!mono_thread_info_new_interrupt_enabled ()) {
4737 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4738 if (thread->resume_event == NULL) {
4739 UNLOCK_THREAD (thread);
4743 /* Awake the thread */
4744 SetEvent (thread->suspend_event);
4746 UNLOCK_THREAD (thread);
4748 /* Wait for the thread to awake */
4749 WaitForSingleObject (thread->resume_event, INFINITE);
4750 CloseHandle (thread->resume_event);
4751 thread->resume_event = NULL;
4755 UNLOCK_THREAD (thread);
4756 /* Awake the thread */
4757 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4759 LOCK_THREAD (thread);
4760 thread->state &= ~ThreadState_Suspended;
4761 UNLOCK_THREAD (thread);
4767 * mono_thread_is_foreign:
4768 * @thread: the thread to query
4770 * This function allows one to determine if a thread was created by the mono runtime and has
4771 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4773 * Returns: true if @thread was not created by the runtime.
4776 mono_thread_is_foreign (MonoThread *thread)
4778 MonoThreadInfo *info = thread->internal_thread->thread_info;
4779 return info->runtime_thread == FALSE;
4783 * mono_add_joinable_thread:
4785 * Add TID to the list of joinable threads.
4786 * LOCKING: Acquires the threads lock.
4789 mono_threads_add_joinable_thread (gpointer tid)
4793 * We cannot detach from threads because it causes problems like
4794 * 2fd16f60/r114307. So we collect them and join them when
4795 * we have time (in he finalizer thread).
4797 joinable_threads_lock ();
4798 if (!joinable_threads)
4799 joinable_threads = g_hash_table_new (NULL, NULL);
4800 g_hash_table_insert (joinable_threads, tid, tid);
4801 joinable_thread_count ++;
4802 joinable_threads_unlock ();
4804 mono_gc_finalize_notify ();
4809 * mono_threads_join_threads:
4811 * Join all joinable threads. This is called from the finalizer thread.
4812 * LOCKING: Acquires the threads lock.
4815 mono_threads_join_threads (void)
4818 GHashTableIter iter;
4825 if (!joinable_thread_count)
4829 joinable_threads_lock ();
4831 if (g_hash_table_size (joinable_threads)) {
4832 g_hash_table_iter_init (&iter, joinable_threads);
4833 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4834 thread = (pthread_t)tid;
4835 g_hash_table_remove (joinable_threads, key);
4836 joinable_thread_count --;
4839 joinable_threads_unlock ();
4841 if (thread != pthread_self ())
4842 /* This shouldn't block */
4843 pthread_join (thread, NULL);
4854 * Wait for thread TID to exit.
4855 * LOCKING: Acquires the threads lock.
4858 mono_thread_join (gpointer tid)
4862 gboolean found = FALSE;
4864 joinable_threads_lock ();
4865 if (!joinable_threads)
4866 joinable_threads = g_hash_table_new (NULL, NULL);
4867 if (g_hash_table_lookup (joinable_threads, tid)) {
4868 g_hash_table_remove (joinable_threads, tid);
4869 joinable_thread_count --;
4872 joinable_threads_unlock ();
4875 thread = (pthread_t)tid;
4876 pthread_join (thread, NULL);