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 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1765 gint32 r = InterlockedCompareExchange(location, value, comparand);
1766 *success = r == comparand;
1770 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1773 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1774 mono_gc_wbarrier_generic_nostore (location);
1778 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1780 return InterlockedCompareExchangePointer(location, value, comparand);
1783 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1785 IntFloatUnion val, ret, cmp;
1788 cmp.fval = comparand;
1789 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1795 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1797 #if SIZEOF_VOID_P == 8
1798 LongDoubleUnion val, comp, ret;
1801 comp.fval = comparand;
1802 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1808 mono_interlocked_lock ();
1810 if (old == comparand)
1812 mono_interlocked_unlock ();
1819 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1821 #if SIZEOF_VOID_P == 4
1822 if (G_UNLIKELY ((size_t)location & 0x7)) {
1824 mono_interlocked_lock ();
1826 if (old == comparand)
1828 mono_interlocked_unlock ();
1832 return InterlockedCompareExchange64 (location, value, comparand);
1836 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1839 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1840 mono_gc_wbarrier_generic_nostore (location);
1845 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1848 res = InterlockedExchangePointer ((gpointer *)location, value);
1849 mono_gc_wbarrier_generic_nostore (location);
1854 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1856 return InterlockedAdd (location, value);
1860 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1862 #if SIZEOF_VOID_P == 4
1863 if (G_UNLIKELY ((size_t)location & 0x7)) {
1865 mono_interlocked_lock ();
1868 mono_interlocked_unlock ();
1872 return InterlockedAdd64 (location, value);
1876 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1878 #if SIZEOF_VOID_P == 4
1879 if (G_UNLIKELY ((size_t)location & 0x7)) {
1881 mono_interlocked_lock ();
1883 mono_interlocked_unlock ();
1887 return InterlockedRead64 (location);
1891 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1893 mono_memory_barrier ();
1897 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1899 mono_thread_clr_state (this, state);
1901 if (state & ThreadState_Background) {
1902 /* If the thread changes the background mode, the main thread has to
1903 * be notified, since it has to rebuild the list of threads to
1906 SetEvent (background_change_event);
1911 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1913 mono_thread_set_state (this, state);
1915 if (state & ThreadState_Background) {
1916 /* If the thread changes the background mode, the main thread has to
1917 * be notified, since it has to rebuild the list of threads to
1920 SetEvent (background_change_event);
1925 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1931 state = this->state;
1933 UNLOCK_THREAD (this);
1938 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1940 MonoInternalThread *current;
1945 current = mono_thread_internal_current ();
1947 this->thread_interrupt_requested = TRUE;
1948 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1950 UNLOCK_THREAD (this);
1953 abort_thread_internal (this, TRUE, FALSE);
1957 void mono_thread_current_check_pending_interrupt ()
1959 MonoInternalThread *thread = mono_thread_internal_current ();
1960 gboolean throw = FALSE;
1962 LOCK_THREAD (thread);
1964 if (thread->thread_interrupt_requested) {
1966 thread->thread_interrupt_requested = FALSE;
1969 UNLOCK_THREAD (thread);
1972 mono_raise_exception (mono_get_exception_thread_interrupted ());
1977 mono_thread_get_abort_signal (void)
1981 #elif defined(PLATFORM_ANDROID)
1983 #elif !defined (SIGRTMIN)
1988 #endif /* SIGUSR1 */
1990 static int abort_signum = -1;
1992 if (abort_signum != -1)
1993 return abort_signum;
1994 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1995 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1996 struct sigaction sinfo;
1997 sigaction (i, NULL, &sinfo);
1998 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2003 /* fallback to the old way */
2005 #endif /* HOST_WIN32 */
2009 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2011 MonoException* exc = mono_thread_request_interruption (FALSE);
2012 if (exc) mono_raise_exception (exc);
2014 #endif /* HOST_WIN32 */
2017 * signal_thread_state_change
2019 * Tells the thread that his state has changed and it has to enter the new
2020 * state as soon as possible.
2022 static void signal_thread_state_change (MonoInternalThread *thread)
2025 gpointer wait_handle;
2028 if (thread == mono_thread_internal_current ()) {
2029 /* Do it synchronously */
2030 MonoException *exc = mono_thread_request_interruption (FALSE);
2032 mono_raise_exception (exc);
2036 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, (ULONG_PTR)NULL);
2039 * This will cause waits to be broken.
2040 * It will also prevent the thread from entering a wait, so if the thread returns
2041 * from the wait before it receives the abort signal, it will just spin in the wait
2042 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2045 wait_handle = mono_thread_info_prepare_interrupt (thread->handle);
2047 /* fixme: store the state somewhere */
2048 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2050 mono_thread_info_finish_interrupt (wait_handle);
2051 #endif /* HOST_WIN32 */
2055 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2057 LOCK_THREAD (thread);
2059 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2060 (thread->state & ThreadState_StopRequested) != 0 ||
2061 (thread->state & ThreadState_Stopped) != 0)
2063 UNLOCK_THREAD (thread);
2067 if ((thread->state & ThreadState_Unstarted) != 0) {
2068 thread->state |= ThreadState_Aborted;
2069 UNLOCK_THREAD (thread);
2073 thread->state |= ThreadState_AbortRequested;
2074 if (thread->abort_state_handle)
2075 mono_gchandle_free (thread->abort_state_handle);
2077 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2078 g_assert (thread->abort_state_handle);
2080 thread->abort_state_handle = 0;
2082 thread->abort_exc = NULL;
2085 * abort_exc is set in mono_thread_execute_interruption(),
2086 * triggered by the call to signal_thread_state_change(),
2087 * below. There's a point between where we have
2088 * abort_state_handle set, but abort_exc NULL, but that's not
2092 UNLOCK_THREAD (thread);
2094 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2096 /* During shutdown, we can't wait for other threads */
2098 /* Make sure the thread is awake */
2099 mono_thread_resume (thread);
2101 abort_thread_internal (thread, TRUE, TRUE);
2105 ves_icall_System_Threading_Thread_ResetAbort (void)
2107 MonoInternalThread *thread = mono_thread_internal_current ();
2108 gboolean was_aborting;
2110 LOCK_THREAD (thread);
2111 was_aborting = thread->state & ThreadState_AbortRequested;
2112 thread->state &= ~ThreadState_AbortRequested;
2113 UNLOCK_THREAD (thread);
2115 if (!was_aborting) {
2116 const char *msg = "Unable to reset abort because no abort was requested";
2117 mono_raise_exception (mono_get_exception_thread_state (msg));
2119 thread->abort_exc = NULL;
2120 if (thread->abort_state_handle) {
2121 mono_gchandle_free (thread->abort_state_handle);
2122 /* This is actually not necessary - the handle
2123 only counts if the exception is set */
2124 thread->abort_state_handle = 0;
2129 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2131 LOCK_THREAD (thread);
2133 thread->state &= ~ThreadState_AbortRequested;
2135 if (thread->abort_exc) {
2136 thread->abort_exc = NULL;
2137 if (thread->abort_state_handle) {
2138 mono_gchandle_free (thread->abort_state_handle);
2139 /* This is actually not necessary - the handle
2140 only counts if the exception is set */
2141 thread->abort_state_handle = 0;
2145 UNLOCK_THREAD (thread);
2149 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2151 MonoInternalThread *thread = this->internal_thread;
2152 MonoObject *state, *deserialized = NULL, *exc;
2155 if (!thread->abort_state_handle)
2158 state = mono_gchandle_get_target (thread->abort_state_handle);
2161 domain = mono_domain_get ();
2162 if (mono_object_domain (state) == domain)
2165 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2167 if (!deserialized) {
2168 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2170 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2171 mono_raise_exception (invalid_op_exc);
2174 return deserialized;
2178 mono_thread_suspend (MonoInternalThread *thread)
2180 LOCK_THREAD (thread);
2182 if ((thread->state & ThreadState_Unstarted) != 0 ||
2183 (thread->state & ThreadState_Aborted) != 0 ||
2184 (thread->state & ThreadState_Stopped) != 0)
2186 UNLOCK_THREAD (thread);
2190 if ((thread->state & ThreadState_Suspended) != 0 ||
2191 (thread->state & ThreadState_SuspendRequested) != 0 ||
2192 (thread->state & ThreadState_StopRequested) != 0)
2194 UNLOCK_THREAD (thread);
2198 thread->state |= ThreadState_SuspendRequested;
2200 UNLOCK_THREAD (thread);
2202 suspend_thread_internal (thread, FALSE);
2207 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2209 if (!mono_thread_suspend (thread))
2210 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2214 mono_thread_resume (MonoInternalThread *thread)
2216 LOCK_THREAD (thread);
2218 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2219 thread->state &= ~ThreadState_SuspendRequested;
2220 UNLOCK_THREAD (thread);
2224 if ((thread->state & ThreadState_Suspended) == 0 ||
2225 (thread->state & ThreadState_Unstarted) != 0 ||
2226 (thread->state & ThreadState_Aborted) != 0 ||
2227 (thread->state & ThreadState_Stopped) != 0)
2229 UNLOCK_THREAD (thread);
2233 return resume_thread_internal (thread);
2237 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2239 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2240 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2244 mono_threads_is_critical_method (MonoMethod *method)
2246 switch (method->wrapper_type) {
2247 case MONO_WRAPPER_RUNTIME_INVOKE:
2248 case MONO_WRAPPER_XDOMAIN_INVOKE:
2249 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2256 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2261 if (mono_threads_is_critical_method (m)) {
2262 *((gboolean*)data) = TRUE;
2269 is_running_protected_wrapper (void)
2271 gboolean found = FALSE;
2272 mono_stack_walk (find_wrapper, &found);
2276 void mono_thread_internal_stop (MonoInternalThread *thread)
2278 LOCK_THREAD (thread);
2280 if ((thread->state & ThreadState_StopRequested) != 0 ||
2281 (thread->state & ThreadState_Stopped) != 0)
2283 UNLOCK_THREAD (thread);
2287 /* Make sure the thread is awake */
2288 mono_thread_resume (thread);
2290 thread->state |= ThreadState_StopRequested;
2291 thread->state &= ~ThreadState_AbortRequested;
2293 UNLOCK_THREAD (thread);
2295 abort_thread_internal (thread, TRUE, TRUE);
2298 void mono_thread_stop (MonoThread *thread)
2300 mono_thread_internal_stop (thread->internal_thread);
2304 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2307 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2312 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2315 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2320 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2323 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2328 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2331 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2336 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2339 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2340 return (void *) tmp;
2344 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2346 volatile MonoObject *tmp;
2347 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2348 return (MonoObject *) tmp;
2352 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2355 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2360 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2363 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2368 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2370 return InterlockedRead8 (ptr);
2374 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2376 return InterlockedRead16 (ptr);
2380 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2382 return InterlockedRead (ptr);
2386 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2388 #if SIZEOF_VOID_P == 4
2389 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2391 mono_interlocked_lock ();
2392 val = *(gint64*)ptr;
2393 mono_interlocked_unlock ();
2397 return InterlockedRead64 (ptr);
2401 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2403 return InterlockedReadPointer (ptr);
2407 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2411 #if SIZEOF_VOID_P == 4
2412 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2414 mono_interlocked_lock ();
2415 val = *(double*)ptr;
2416 mono_interlocked_unlock ();
2421 u.ival = InterlockedRead64 (ptr);
2427 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2431 u.ival = InterlockedRead (ptr);
2437 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2439 return InterlockedReadPointer (ptr);
2443 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2445 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2449 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2451 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2455 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2457 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2461 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2463 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2467 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2469 mono_atomic_store_release ((volatile void **) ptr, value);
2473 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2475 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2479 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2481 mono_atomic_store_release ((volatile double *) ptr, value);
2485 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2487 mono_atomic_store_release ((volatile float *) ptr, value);
2491 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2493 InterlockedWrite8 (ptr, value);
2497 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2499 InterlockedWrite16 (ptr, value);
2503 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2505 InterlockedWrite (ptr, value);
2509 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2511 #if SIZEOF_VOID_P == 4
2512 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2513 mono_interlocked_lock ();
2514 *(gint64*)ptr = value;
2515 mono_interlocked_unlock ();
2520 InterlockedWrite64 (ptr, value);
2524 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2526 InterlockedWritePointer (ptr, value);
2530 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2534 #if SIZEOF_VOID_P == 4
2535 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2536 mono_interlocked_lock ();
2537 *(double*)ptr = value;
2538 mono_interlocked_unlock ();
2545 InterlockedWrite64 (ptr, u.ival);
2549 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2555 InterlockedWrite (ptr, u.ival);
2559 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2561 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2565 mono_thread_init_tls (void)
2567 MONO_FAST_TLS_INIT (tls_current_object);
2568 mono_native_tls_alloc (¤t_object_key, NULL);
2571 void mono_thread_init (MonoThreadStartCB start_cb,
2572 MonoThreadAttachCB attach_cb)
2574 mono_mutex_init_recursive(&threads_mutex);
2575 mono_mutex_init_recursive(&interlocked_mutex);
2576 mono_mutex_init_recursive(&contexts_mutex);
2577 mono_mutex_init_recursive(&joinable_threads_mutex);
2579 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2580 g_assert(background_change_event != NULL);
2582 mono_init_static_data_info (&thread_static_info);
2583 mono_init_static_data_info (&context_static_info);
2585 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2587 mono_thread_start_cb = start_cb;
2588 mono_thread_attach_cb = attach_cb;
2590 /* Get a pseudo handle to the current process. This is just a
2591 * kludge so that wapi can build a process handle if needed.
2592 * As a pseudo handle is returned, we don't need to clean
2595 GetCurrentProcess ();
2598 void mono_thread_cleanup (void)
2600 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2601 MonoThreadInfo *info;
2603 /* The main thread must abandon any held mutexes (particularly
2604 * important for named mutexes as they are shared across
2605 * processes, see bug 74680.) This will happen when the
2606 * thread exits, but if it's not running in a subthread it
2607 * won't exit in time.
2609 info = mono_thread_info_current ();
2610 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2614 /* This stuff needs more testing, it seems one of these
2615 * critical sections can be locked when mono_thread_cleanup is
2618 mono_mutex_destroy (&threads_mutex);
2619 mono_mutex_destroy (&interlocked_mutex);
2620 mono_mutex_destroy (&contexts_mutex);
2621 mono_mutex_destroy (&delayed_free_table_mutex);
2622 mono_mutex_destroy (&small_id_mutex);
2623 CloseHandle (background_change_event);
2626 mono_native_tls_free (current_object_key);
2630 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2632 mono_thread_cleanup_fn = func;
2636 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2638 thread->internal_thread->manage_callback = func;
2641 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2643 mono_thread_notify_pending_exc_fn = func;
2647 static void print_tids (gpointer key, gpointer value, gpointer user)
2649 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2650 * sizeof(uint) and a cast to uint would overflow
2652 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2653 * print this as a pointer.
2655 g_message ("Waiting for: %p", key);
2660 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2661 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2665 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2669 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2671 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2673 if(ret==WAIT_FAILED) {
2674 /* See the comment in build_wait_tids() */
2675 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2679 for(i=0; i<wait->num; i++)
2680 CloseHandle (wait->handles[i]);
2682 if (ret == WAIT_TIMEOUT)
2685 for(i=0; i<wait->num; i++) {
2686 gsize tid = wait->threads[i]->tid;
2689 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2690 * it can still run io-layer etc. code. So wait for it to really exit.
2691 * FIXME: This won't join threads which are not in the joinable_hash yet.
2693 mono_thread_join ((gpointer)tid);
2695 mono_threads_lock ();
2696 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2697 /* This thread must have been killed, because
2698 * it hasn't cleaned itself up. (It's just
2699 * possible that the thread exited before the
2700 * parent thread had a chance to store the
2701 * handle, and now there is another pointer to
2702 * the already-exited thread stored. In this
2703 * case, we'll just get two
2704 * mono_profiler_thread_end() calls for the
2708 mono_threads_unlock ();
2709 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2710 thread_cleanup (wait->threads[i]);
2712 mono_threads_unlock ();
2717 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2719 guint32 i, ret, count;
2721 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2723 /* Add the thread state change event, so it wakes up if a thread changes
2724 * to background mode.
2727 if (count < MAXIMUM_WAIT_OBJECTS) {
2728 wait->handles [count] = background_change_event;
2732 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2734 if(ret==WAIT_FAILED) {
2735 /* See the comment in build_wait_tids() */
2736 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2740 for(i=0; i<wait->num; i++)
2741 CloseHandle (wait->handles[i]);
2743 if (ret == WAIT_TIMEOUT)
2746 if (ret < wait->num) {
2747 gsize tid = wait->threads[ret]->tid;
2748 mono_threads_lock ();
2749 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2750 /* See comment in wait_for_tids about thread cleanup */
2751 mono_threads_unlock ();
2752 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2753 thread_cleanup (wait->threads [ret]);
2755 mono_threads_unlock ();
2759 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2761 struct wait_data *wait=(struct wait_data *)user;
2763 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2765 MonoInternalThread *thread=(MonoInternalThread *)value;
2767 /* Ignore background threads, we abort them later */
2768 /* Do not lock here since it is not needed and the caller holds threads_lock */
2769 if (thread->state & ThreadState_Background) {
2770 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2771 return; /* just leave, ignore */
2774 if (mono_gc_is_finalizer_internal_thread (thread)) {
2775 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2779 if (thread == mono_thread_internal_current ()) {
2780 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2784 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2785 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2789 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2790 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2794 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2795 if (handle == NULL) {
2796 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2800 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2801 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2802 wait->handles[wait->num]=handle;
2803 wait->threads[wait->num]=thread;
2806 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2808 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2813 /* Just ignore the rest, we can't do anything with
2820 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2822 struct wait_data *wait=(struct wait_data *)user;
2823 gsize self = GetCurrentThreadId ();
2824 MonoInternalThread *thread = value;
2827 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2830 /* The finalizer thread is not a background thread */
2831 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2832 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2834 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2838 /* printf ("A: %d\n", wait->num); */
2839 wait->handles[wait->num]=thread->handle;
2840 wait->threads[wait->num]=thread;
2843 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2844 mono_thread_internal_stop (thread);
2848 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2852 * mono_threads_set_shutting_down:
2854 * Is called by a thread that wants to shut down Mono. If the runtime is already
2855 * shutting down, the calling thread is suspended/stopped, and this function never
2859 mono_threads_set_shutting_down (void)
2861 MonoInternalThread *current_thread = mono_thread_internal_current ();
2863 mono_threads_lock ();
2865 if (shutting_down) {
2866 mono_threads_unlock ();
2868 /* Make sure we're properly suspended/stopped */
2870 LOCK_THREAD (current_thread);
2872 if ((current_thread->state & ThreadState_SuspendRequested) ||
2873 (current_thread->state & ThreadState_AbortRequested) ||
2874 (current_thread->state & ThreadState_StopRequested)) {
2875 UNLOCK_THREAD (current_thread);
2876 mono_thread_execute_interruption (current_thread);
2878 current_thread->state |= ThreadState_Stopped;
2879 UNLOCK_THREAD (current_thread);
2882 /*since we're killing the thread, unset the current domain.*/
2883 mono_domain_unset ();
2885 /* Wake up other threads potentially waiting for us */
2886 mono_thread_info_exit ();
2888 shutting_down = TRUE;
2890 /* Not really a background state change, but this will
2891 * interrupt the main thread if it is waiting for all
2892 * the other threads.
2894 SetEvent (background_change_event);
2896 mono_threads_unlock ();
2900 void mono_thread_manage (void)
2902 struct wait_data wait_data;
2903 struct wait_data *wait = &wait_data;
2905 memset (wait, 0, sizeof (struct wait_data));
2906 /* join each thread that's still running */
2907 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2909 mono_threads_lock ();
2911 THREAD_DEBUG (g_message("%s: No threads", __func__));
2912 mono_threads_unlock ();
2915 mono_threads_unlock ();
2918 mono_threads_lock ();
2919 if (shutting_down) {
2920 /* somebody else is shutting down */
2921 mono_threads_unlock ();
2924 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2925 mono_g_hash_table_foreach (threads, print_tids, NULL));
2927 ResetEvent (background_change_event);
2929 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2930 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2931 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2932 mono_threads_unlock ();
2934 /* Something to wait for */
2935 wait_for_tids_or_state_change (wait, INFINITE);
2937 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2938 } while(wait->num>0);
2940 /* Mono is shutting down, so just wait for the end */
2941 if (!mono_runtime_try_shutdown ()) {
2942 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2943 mono_thread_suspend (mono_thread_internal_current ());
2944 mono_thread_execute_interruption (mono_thread_internal_current ());
2948 * Remove everything but the finalizer thread and self.
2949 * Also abort all the background threads
2952 mono_threads_lock ();
2955 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2956 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2957 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2959 mono_threads_unlock ();
2961 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2963 /* Something to wait for */
2964 wait_for_tids (wait, INFINITE);
2966 } while (wait->num > 0);
2969 * give the subthreads a chance to really quit (this is mainly needed
2970 * to get correct user and system times from getrusage/wait/time(1)).
2971 * This could be removed if we avoid pthread_detach() and use pthread_join().
2973 mono_thread_info_yield ();
2976 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2978 MonoInternalThread *thread=(MonoInternalThread *)value;
2980 if(thread->tid != (gsize)user) {
2981 /*TerminateThread (thread->handle, -1);*/
2985 void mono_thread_abort_all_other_threads (void)
2987 gsize self = GetCurrentThreadId ();
2989 mono_threads_lock ();
2990 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2991 mono_g_hash_table_size (threads));
2992 mono_g_hash_table_foreach (threads, print_tids, NULL));
2994 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2996 mono_threads_unlock ();
3000 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3002 MonoInternalThread *thread = (MonoInternalThread*)value;
3003 struct wait_data *wait = (struct wait_data*)user_data;
3007 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3009 * This needs no locking.
3011 if ((thread->state & ThreadState_Suspended) != 0 ||
3012 (thread->state & ThreadState_Stopped) != 0)
3015 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3016 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3020 wait->handles [wait->num] = handle;
3021 wait->threads [wait->num] = thread;
3027 * mono_thread_suspend_all_other_threads:
3029 * Suspend all managed threads except the finalizer thread and this thread. It is
3030 * not possible to resume them later.
3032 void mono_thread_suspend_all_other_threads (void)
3034 struct wait_data wait_data;
3035 struct wait_data *wait = &wait_data;
3037 gsize self = GetCurrentThreadId ();
3039 guint32 eventidx = 0;
3040 gboolean starting, finished;
3042 memset (wait, 0, sizeof (struct wait_data));
3044 * The other threads could be in an arbitrary state at this point, i.e.
3045 * they could be starting up, shutting down etc. This means that there could be
3046 * threads which are not even in the threads hash table yet.
3050 * First we set a barrier which will be checked by all threads before they
3051 * are added to the threads hash table, and they will exit if the flag is set.
3052 * This ensures that no threads could be added to the hash later.
3053 * We will use shutting_down as the barrier for now.
3055 g_assert (shutting_down);
3058 * We make multiple calls to WaitForMultipleObjects since:
3059 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3060 * - some threads could exit without becoming suspended
3065 * Make a copy of the hashtable since we can't do anything with
3066 * threads while threads_mutex is held.
3069 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3070 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3071 mono_threads_lock ();
3072 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3073 mono_threads_unlock ();
3075 events = g_new0 (gpointer, wait->num);
3077 /* Get the suspended events that we'll be waiting for */
3078 for (i = 0; i < wait->num; ++i) {
3079 MonoInternalThread *thread = wait->threads [i];
3080 gboolean signal_suspend = FALSE;
3082 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3083 //CloseHandle (wait->handles [i]);
3084 wait->threads [i] = NULL; /* ignore this thread in next loop */
3088 LOCK_THREAD (thread);
3090 if (thread->suspended_event == NULL) {
3091 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3092 if (thread->suspended_event == NULL) {
3093 /* Forget this one and go on to the next */
3094 UNLOCK_THREAD (thread);
3099 if ((thread->state & ThreadState_Suspended) != 0 ||
3100 (thread->state & ThreadState_StopRequested) != 0 ||
3101 (thread->state & ThreadState_Stopped) != 0) {
3102 UNLOCK_THREAD (thread);
3103 CloseHandle (wait->handles [i]);
3104 wait->threads [i] = NULL; /* ignore this thread in next loop */
3108 if ((thread->state & ThreadState_SuspendRequested) == 0)
3109 signal_suspend = TRUE;
3111 events [eventidx++] = thread->suspended_event;
3113 /* Convert abort requests into suspend requests */
3114 if ((thread->state & ThreadState_AbortRequested) != 0)
3115 thread->state &= ~ThreadState_AbortRequested;
3117 thread->state |= ThreadState_SuspendRequested;
3119 UNLOCK_THREAD (thread);
3121 /* Signal the thread to suspend */
3122 if (mono_thread_info_new_interrupt_enabled ())
3123 suspend_thread_internal (thread, TRUE);
3124 else if (signal_suspend)
3125 signal_thread_state_change (thread);
3128 /*Only wait on the suspend event if we are using the old path */
3129 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3130 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3131 for (i = 0; i < wait->num; ++i) {
3132 MonoInternalThread *thread = wait->threads [i];
3137 LOCK_THREAD (thread);
3138 if ((thread->state & ThreadState_Suspended) != 0) {
3139 CloseHandle (thread->suspended_event);
3140 thread->suspended_event = NULL;
3142 UNLOCK_THREAD (thread);
3146 if (eventidx <= 0) {
3148 * If there are threads which are starting up, we wait until they
3149 * are suspended when they try to register in the threads hash.
3150 * This is guaranteed to finish, since the threads which can create new
3151 * threads get suspended after a while.
3152 * FIXME: The finalizer thread can still create new threads.
3154 mono_threads_lock ();
3155 if (threads_starting_up)
3156 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3159 mono_threads_unlock ();
3171 collect_threads (gpointer key, gpointer value, gpointer user_data)
3173 MonoInternalThread *thread = (MonoInternalThread*)value;
3174 struct wait_data *wait = (struct wait_data*)user_data;
3177 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3178 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3182 wait->handles [wait->num] = handle;
3183 wait->threads [wait->num] = thread;
3188 static gboolean thread_dump_requested;
3190 static G_GNUC_UNUSED gboolean
3191 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3193 GString *p = (GString*)data;
3194 MonoMethod *method = NULL;
3196 method = mono_jit_info_get_method (frame->ji);
3199 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3200 g_string_append_printf (p, " %s\n", location);
3203 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3209 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3211 GString* text = g_string_new (0);
3213 GError *error = NULL;
3216 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3218 g_string_append_printf (text, "\n\"%s\"", name);
3221 else if (thread->threadpool_thread)
3222 g_string_append (text, "\n\"<threadpool thread>\"");
3224 g_string_append (text, "\n\"<unnamed thread>\"");
3227 /* This no longer works with remote unwinding */
3229 wapi_desc = wapi_current_thread_desc ();
3230 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3235 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3236 mono_thread_info_finish_suspend_and_resume (info);
3238 fprintf (stdout, "%s", text->str);
3240 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3241 OutputDebugStringA(text->str);
3244 g_string_free (text, TRUE);
3249 dump_thread (gpointer key, gpointer value, gpointer user)
3251 MonoInternalThread *thread = (MonoInternalThread *)value;
3252 MonoThreadInfo *info;
3254 if (thread == mono_thread_internal_current ())
3258 FIXME This still can hang if we stop a thread during malloc.
3259 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3260 that takes a callback and runs it with the target suspended.
3261 We probably should loop a bit around trying to get it to either managed code
3264 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3269 print_thread_dump (thread, info);
3273 mono_threads_perform_thread_dump (void)
3275 if (!thread_dump_requested)
3278 printf ("Full thread dump:\n");
3280 /* We take the loader lock and the root domain lock as to increase our odds of not deadlocking if
3281 something needs then in the process.
3283 mono_loader_lock ();
3284 mono_domain_lock (mono_get_root_domain ());
3286 mono_threads_lock ();
3287 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3288 mono_threads_unlock ();
3290 mono_domain_unlock (mono_get_root_domain ());
3291 mono_loader_unlock ();
3293 thread_dump_requested = FALSE;
3297 * mono_threads_request_thread_dump:
3299 * Ask all threads except the current to print their stacktrace to stdout.
3302 mono_threads_request_thread_dump (void)
3304 struct wait_data wait_data;
3305 struct wait_data *wait = &wait_data;
3308 /*The new thread dump code runs out of the finalizer thread. */
3309 if (mono_thread_info_new_interrupt_enabled ()) {
3310 thread_dump_requested = TRUE;
3311 mono_gc_finalize_notify ();
3316 memset (wait, 0, sizeof (struct wait_data));
3319 * Make a copy of the hashtable since we can't do anything with
3320 * threads while threads_mutex is held.
3322 mono_threads_lock ();
3323 mono_g_hash_table_foreach (threads, collect_threads, wait);
3324 mono_threads_unlock ();
3326 for (i = 0; i < wait->num; ++i) {
3327 MonoInternalThread *thread = wait->threads [i];
3329 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3330 (thread != mono_thread_internal_current ()) &&
3331 !thread->thread_dump_requested) {
3332 thread->thread_dump_requested = TRUE;
3334 signal_thread_state_change (thread);
3337 CloseHandle (wait->handles [i]);
3343 gint allocated; /* +1 so that refs [allocated] == NULL */
3347 typedef struct ref_stack RefStack;
3350 ref_stack_new (gint initial_size)
3354 initial_size = MAX (initial_size, 16) + 1;
3355 rs = g_new0 (RefStack, 1);
3356 rs->refs = g_new0 (gpointer, initial_size);
3357 rs->allocated = initial_size;
3362 ref_stack_destroy (gpointer ptr)
3373 ref_stack_push (RefStack *rs, gpointer ptr)
3375 g_assert (rs != NULL);
3377 if (rs->bottom >= rs->allocated) {
3378 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3379 rs->allocated <<= 1;
3380 rs->refs [rs->allocated] = NULL;
3382 rs->refs [rs->bottom++] = ptr;
3386 ref_stack_pop (RefStack *rs)
3388 if (rs == NULL || rs->bottom == 0)
3392 rs->refs [rs->bottom] = NULL;
3396 ref_stack_find (RefStack *rs, gpointer ptr)
3403 for (refs = rs->refs; refs && *refs; refs++) {
3411 * mono_thread_push_appdomain_ref:
3413 * Register that the current thread may have references to objects in domain
3414 * @domain on its stack. Each call to this function should be paired with a
3415 * call to pop_appdomain_ref.
3418 mono_thread_push_appdomain_ref (MonoDomain *domain)
3420 MonoInternalThread *thread = mono_thread_internal_current ();
3423 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3424 SPIN_LOCK (thread->lock_thread_id);
3425 if (thread->appdomain_refs == NULL)
3426 thread->appdomain_refs = ref_stack_new (16);
3427 ref_stack_push (thread->appdomain_refs, domain);
3428 SPIN_UNLOCK (thread->lock_thread_id);
3433 mono_thread_pop_appdomain_ref (void)
3435 MonoInternalThread *thread = mono_thread_internal_current ();
3438 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3439 SPIN_LOCK (thread->lock_thread_id);
3440 ref_stack_pop (thread->appdomain_refs);
3441 SPIN_UNLOCK (thread->lock_thread_id);
3446 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3449 SPIN_LOCK (thread->lock_thread_id);
3450 res = ref_stack_find (thread->appdomain_refs, domain);
3451 SPIN_UNLOCK (thread->lock_thread_id);
3456 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3458 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3461 typedef struct abort_appdomain_data {
3462 struct wait_data wait;
3464 } abort_appdomain_data;
3467 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3469 MonoInternalThread *thread = (MonoInternalThread*)value;
3470 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3471 MonoDomain *domain = data->domain;
3473 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3474 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3476 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3477 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3480 data->wait.handles [data->wait.num] = handle;
3481 data->wait.threads [data->wait.num] = thread;
3484 /* Just ignore the rest, we can't do anything with
3492 * mono_threads_abort_appdomain_threads:
3494 * Abort threads which has references to the given appdomain.
3497 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3499 #ifdef __native_client__
3503 abort_appdomain_data user_data;
3505 int orig_timeout = timeout;
3508 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3510 start_time = mono_msec_ticks ();
3512 mono_threads_lock ();
3514 user_data.domain = domain;
3515 user_data.wait.num = 0;
3516 /* This shouldn't take any locks */
3517 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3518 mono_threads_unlock ();
3520 if (user_data.wait.num > 0) {
3521 /* Abort the threads outside the threads lock */
3522 for (i = 0; i < user_data.wait.num; ++i)
3523 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3526 * We should wait for the threads either to abort, or to leave the
3527 * domain. We can't do the latter, so we wait with a timeout.
3529 wait_for_tids (&user_data.wait, 100);
3532 /* Update remaining time */
3533 timeout -= mono_msec_ticks () - start_time;
3534 start_time = mono_msec_ticks ();
3536 if (orig_timeout != -1 && timeout < 0)
3539 while (user_data.wait.num > 0);
3541 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3547 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3549 MonoInternalThread *thread = (MonoInternalThread*)value;
3550 MonoDomain *domain = (MonoDomain*)user_data;
3553 /* No locking needed here */
3554 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3556 if (thread->cached_culture_info) {
3557 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3558 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3559 if (obj && obj->vtable->domain == domain)
3560 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3566 * mono_threads_clear_cached_culture:
3568 * Clear the cached_current_culture from all threads if it is in the
3572 mono_threads_clear_cached_culture (MonoDomain *domain)
3574 mono_threads_lock ();
3575 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3576 mono_threads_unlock ();
3580 * mono_thread_get_undeniable_exception:
3582 * Return an exception which needs to be raised when leaving a catch clause.
3583 * This is used for undeniable exception propagation.
3586 mono_thread_get_undeniable_exception (void)
3588 MonoInternalThread *thread = mono_thread_internal_current ();
3590 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3592 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3593 * exception if the thread no longer references a dying appdomain.
3595 thread->abort_exc->trace_ips = NULL;
3596 thread->abort_exc->stack_trace = NULL;
3597 return thread->abort_exc;
3603 #if MONO_SMALL_CONFIG
3604 #define NUM_STATIC_DATA_IDX 4
3605 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3609 #define NUM_STATIC_DATA_IDX 8
3610 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3611 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3615 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3618 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3621 gpointer *static_data = addr;
3622 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3625 if (!static_data [i])
3627 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3628 ptr = static_data [i];
3629 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3630 uintptr_t bmap = static_reference_bitmaps [i][j];
3633 if ((bmap & 1) && *p) {
3634 mark_func (p, gc_data);
3644 * mono_alloc_static_data
3646 * Allocate memory blocks for storing threads or context static data
3649 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3651 guint idx = (offset >> 24) - 1;
3654 gpointer* static_data = *static_data_ptr;
3656 static void* tls_desc = NULL;
3657 if (mono_gc_user_markers_supported () && !tls_desc)
3658 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3659 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3660 *static_data_ptr = static_data;
3661 static_data [0] = static_data;
3664 for (i = 1; i <= idx; ++i) {
3665 if (static_data [i])
3667 if (mono_gc_user_markers_supported () && threadlocal)
3668 static_data [i] = g_malloc0 (static_data_size [i]);
3670 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3675 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3678 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3679 gpointer p = static_data [i];
3683 * At this point, the static data pointer array is still registered with the
3684 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3685 * data. Freeing the individual arrays without first nulling their slots
3686 * would make it possible for mark_tls_slots() to encounter a pointer to
3687 * such an already freed array. See bug #13813.
3689 static_data [i] = NULL;
3690 mono_memory_write_barrier ();
3691 if (mono_gc_user_markers_supported () && threadlocal)
3694 mono_gc_free_fixed (p);
3696 mono_gc_free_fixed (static_data);
3700 * mono_init_static_data_info
3702 * Initializes static data counters
3704 static void mono_init_static_data_info (StaticDataInfo *static_data)
3706 static_data->idx = 0;
3707 static_data->offset = 0;
3708 static_data->freelist = NULL;
3712 * mono_alloc_static_data_slot
3714 * Generates an offset for static data. static_data contains the counters
3715 * used to generate it.
3718 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3722 if (!static_data->idx && !static_data->offset) {
3724 * we use the first chunk of the first allocation also as
3725 * an array for the rest of the data
3727 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3729 static_data->offset += align - 1;
3730 static_data->offset &= ~(align - 1);
3731 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3732 static_data->idx ++;
3733 g_assert (size <= static_data_size [static_data->idx]);
3734 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3735 static_data->offset = 0;
3737 offset = static_data->offset | ((static_data->idx + 1) << 24);
3738 static_data->offset += size;
3743 * ensure thread static fields already allocated are valid for thread
3744 * This function is called when a thread is created or on thread attach.
3747 thread_adjust_static_data (MonoInternalThread *thread)
3751 mono_threads_lock ();
3752 if (thread_static_info.offset || thread_static_info.idx > 0) {
3753 /* get the current allocated size */
3754 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3755 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3757 mono_threads_unlock ();
3761 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3763 MonoInternalThread *thread = value;
3764 guint32 offset = GPOINTER_TO_UINT (user);
3766 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3769 static MonoThreadDomainTls*
3770 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3772 MonoThreadDomainTls* prev = NULL;
3773 MonoThreadDomainTls* tmp = static_data->freelist;
3775 if (tmp->size == size) {
3777 prev->next = tmp->next;
3779 static_data->freelist = tmp->next;
3788 #if SIZEOF_VOID_P == 4
3795 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3798 int idx = (offset >> 24) - 1;
3800 if (!static_reference_bitmaps [idx])
3801 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3802 rb = static_reference_bitmaps [idx];
3804 offset /= sizeof (gpointer);
3805 /* offset is now the bitmap offset */
3806 for (i = 0; i < numbits; ++i) {
3807 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3808 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (ONE_P << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3813 clear_reference_bitmap (guint32 offset, guint32 size)
3815 int idx = (offset >> 24) - 1;
3817 rb = static_reference_bitmaps [idx];
3819 offset /= sizeof (gpointer);
3820 size /= sizeof (gpointer);
3822 /* offset is now the bitmap offset */
3823 for (; offset < size; ++offset)
3824 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3828 * The offset for a special static variable is composed of three parts:
3829 * a bit that indicates the type of static data (0:thread, 1:context),
3830 * an index in the array of chunks of memory for the thread (thread->static_data)
3831 * and an offset in that chunk of mem. This allows allocating less memory in the
3836 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3839 if (static_type == SPECIAL_STATIC_THREAD) {
3840 MonoThreadDomainTls *item;
3841 mono_threads_lock ();
3842 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3843 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3845 offset = item->offset;
3848 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3850 update_tls_reference_bitmap (offset, bitmap, numbits);
3851 /* This can be called during startup */
3852 if (threads != NULL)
3853 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3854 mono_threads_unlock ();
3856 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3857 mono_contexts_lock ();
3858 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3859 mono_contexts_unlock ();
3860 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3866 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3868 /* The high bit means either thread (0) or static (1) data. */
3870 guint32 static_type = (offset & 0x80000000);
3873 offset &= 0x7fffffff;
3874 idx = (offset >> 24) - 1;
3876 if (static_type == 0) {
3877 return get_thread_static_data (thread, offset);
3879 /* Allocate static data block under demand, since we don't have a list
3882 MonoAppContext *context = mono_context_get ();
3883 if (!context->static_data || !context->static_data [idx]) {
3884 mono_contexts_lock ();
3885 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3886 mono_contexts_unlock ();
3888 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3893 mono_get_special_static_data (guint32 offset)
3895 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3904 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3906 MonoInternalThread *thread = value;
3907 TlsOffsetSize *data = user;
3908 int idx = (data->offset >> 24) - 1;
3911 if (!thread->static_data || !thread->static_data [idx])
3913 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3914 mono_gc_bzero_atomic (ptr, data->size);
3918 do_free_special_slot (guint32 offset, guint32 size)
3920 guint32 static_type = (offset & 0x80000000);
3921 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3922 if (static_type == 0) {
3924 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3925 data.offset = offset & 0x7fffffff;
3927 clear_reference_bitmap (data.offset, data.size);
3928 if (threads != NULL)
3929 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3930 item->offset = offset;
3933 if (!mono_runtime_is_shutting_down ()) {
3934 item->next = thread_static_info.freelist;
3935 thread_static_info.freelist = item;
3937 /* We could be called during shutdown after mono_thread_cleanup () is called */
3941 /* FIXME: free context static data as well */
3946 do_free_special (gpointer key, gpointer value, gpointer data)
3948 MonoClassField *field = key;
3949 guint32 offset = GPOINTER_TO_UINT (value);
3952 size = mono_type_size (field->type, &align);
3953 do_free_special_slot (offset, size);
3957 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3959 mono_threads_lock ();
3960 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3961 mono_threads_unlock ();
3965 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3967 mono_threads_lock ();
3968 do_free_special_slot (offset, size);
3969 mono_threads_unlock ();
3973 * allocates room in the thread local area for storing an instance of the struct type
3974 * the allocation is kept track of in domain->tlsrec_list.
3977 mono_thread_alloc_tls (MonoReflectionType *type)
3979 MonoDomain *domain = mono_domain_get ();
3981 MonoTlsDataRecord *tlsrec;
3984 gsize default_bitmap [4] = {0};
3985 uint32_t tls_offset;
3989 klass = mono_class_from_mono_type (type->type);
3990 /* TlsDatum is a struct, so we subtract the object header size offset */
3991 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3992 size = mono_type_size (type->type, &align);
3993 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3994 if (bitmap != default_bitmap)
3996 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3997 tlsrec->tls_offset = tls_offset;
3998 tlsrec->size = size;
3999 mono_domain_lock (domain);
4000 tlsrec->next = domain->tlsrec_list;
4001 domain->tlsrec_list = tlsrec;
4002 mono_domain_unlock (domain);
4007 destroy_tls (MonoDomain *domain, uint32_t tls_offset)
4009 MonoTlsDataRecord *prev = NULL;
4010 MonoTlsDataRecord *cur;
4013 mono_domain_lock (domain);
4014 cur = domain->tlsrec_list;
4016 if (cur->tls_offset == tls_offset) {
4018 prev->next = cur->next;
4020 domain->tlsrec_list = cur->next;
4028 mono_domain_unlock (domain);
4030 mono_special_static_data_free_slot (tls_offset, size);
4034 mono_thread_destroy_tls (uint32_t tls_offset)
4036 destroy_tls (mono_domain_get (), tls_offset);
4040 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4043 mono_thread_destroy_domain_tls (MonoDomain *domain)
4045 while (domain->tlsrec_list)
4046 destroy_tls (domain, domain->tlsrec_list->tls_offset);
4049 static MonoClassField *local_slots = NULL;
4052 /* local tls data to get locals_slot from a thread */
4055 /* index in the locals_slot array */
4060 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4062 LocalSlotID *sid = user_data;
4063 MonoInternalThread *thread = (MonoInternalThread*)value;
4064 MonoArray *slots_array;
4066 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4067 * it is for the right domain, so we need to check if it is allocated an initialized
4068 * for the current thread.
4070 /*g_print ("handling thread %p\n", thread);*/
4071 if (!thread->static_data || !thread->static_data [sid->idx])
4073 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4074 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4076 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4080 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4088 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4090 g_warning ("local_slots field not found in Thread class");
4094 domain = mono_domain_get ();
4095 mono_domain_lock (domain);
4096 if (domain->special_static_fields)
4097 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4098 mono_domain_unlock (domain);
4101 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4102 sid.offset = GPOINTER_TO_UINT (addr);
4103 sid.offset &= 0x7fffffff;
4104 sid.idx = (sid.offset >> 24) - 1;
4105 mono_threads_lock ();
4106 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4107 mono_threads_unlock ();
4109 /* FIXME: clear the slot for MonoAppContexts, too */
4114 static void CALLBACK dummy_apc (ULONG_PTR param)
4120 * mono_thread_execute_interruption
4122 * Performs the operation that the requested thread state requires (abort,
4125 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4127 LOCK_THREAD (thread);
4129 /* MonoThread::interruption_requested can only be changed with atomics */
4130 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4131 /* this will consume pending APC calls */
4133 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4135 InterlockedDecrement (&thread_interruption_requested);
4136 /* Clear the interrupted flag of the thread so it can wait again */
4137 mono_thread_info_clear_interruption ();
4140 if ((thread->state & ThreadState_AbortRequested) != 0) {
4141 UNLOCK_THREAD (thread);
4142 if (thread->abort_exc == NULL) {
4144 * This might be racy, but it has to be called outside the lock
4145 * since it calls managed code.
4147 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4149 return thread->abort_exc;
4151 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4152 self_suspend_internal (thread);
4155 else if ((thread->state & ThreadState_StopRequested) != 0) {
4156 /* FIXME: do this through the JIT? */
4158 UNLOCK_THREAD (thread);
4160 mono_thread_exit ();
4162 } else if (thread->pending_exception) {
4165 exc = thread->pending_exception;
4166 thread->pending_exception = NULL;
4168 UNLOCK_THREAD (thread);
4170 } else if (thread->thread_interrupt_requested) {
4172 thread->thread_interrupt_requested = FALSE;
4173 UNLOCK_THREAD (thread);
4175 return(mono_get_exception_thread_interrupted ());
4178 UNLOCK_THREAD (thread);
4184 * mono_thread_request_interruption
4186 * A signal handler can call this method to request the interruption of a
4187 * thread. The result of the interruption will depend on the current state of
4188 * the thread. If the result is an exception that needs to be throw, it is
4189 * provided as return value.
4192 mono_thread_request_interruption (gboolean running_managed)
4194 MonoInternalThread *thread = mono_thread_internal_current ();
4196 /* The thread may already be stopping */
4201 if (thread->interrupt_on_stop &&
4202 thread->state & ThreadState_StopRequested &&
4203 thread->state & ThreadState_Background)
4207 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4209 InterlockedIncrement (&thread_interruption_requested);
4211 if (!running_managed || is_running_protected_wrapper ()) {
4212 /* Can't stop while in unmanaged code. Increase the global interruption
4213 request count. When exiting the unmanaged method the count will be
4214 checked and the thread will be interrupted. */
4216 if (mono_thread_notify_pending_exc_fn && !running_managed)
4217 /* The JIT will notify the thread about the interruption */
4218 /* This shouldn't take any locks */
4219 mono_thread_notify_pending_exc_fn (NULL);
4221 /* this will awake the thread if it is in WaitForSingleObject
4223 /* Our implementation of this function ignores the func argument */
4225 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4227 mono_thread_info_self_interrupt ();
4232 return mono_thread_execute_interruption (thread);
4236 /*This function should be called by a thread after it has exited all of
4237 * its handle blocks at interruption time.*/
4239 mono_thread_resume_interruption (void)
4241 MonoInternalThread *thread = mono_thread_internal_current ();
4242 gboolean still_aborting;
4244 /* The thread may already be stopping */
4248 LOCK_THREAD (thread);
4249 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4250 UNLOCK_THREAD (thread);
4252 /*This can happen if the protected block called Thread::ResetAbort*/
4253 if (!still_aborting)
4256 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4258 InterlockedIncrement (&thread_interruption_requested);
4260 mono_thread_info_self_interrupt ();
4262 return mono_thread_execute_interruption (thread);
4265 gboolean mono_thread_interruption_requested ()
4267 if (thread_interruption_requested) {
4268 MonoInternalThread *thread = mono_thread_internal_current ();
4269 /* The thread may already be stopping */
4271 return (thread->interruption_requested);
4276 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4278 MonoInternalThread *thread = mono_thread_internal_current ();
4280 /* The thread may already be stopping */
4284 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4285 MonoException* exc = mono_thread_execute_interruption (thread);
4286 if (exc) mono_raise_exception (exc);
4291 * Performs the interruption of the current thread, if one has been requested,
4292 * and the thread is not running a protected wrapper.
4294 void mono_thread_interruption_checkpoint ()
4296 mono_thread_interruption_checkpoint_request (FALSE);
4300 * Performs the interruption of the current thread, if one has been requested.
4302 void mono_thread_force_interruption_checkpoint ()
4304 mono_thread_interruption_checkpoint_request (TRUE);
4308 * mono_thread_get_and_clear_pending_exception:
4310 * Return any pending exceptions for the current thread and clear it as a side effect.
4313 mono_thread_get_and_clear_pending_exception (void)
4315 MonoInternalThread *thread = mono_thread_internal_current ();
4317 /* The thread may already be stopping */
4321 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4322 return mono_thread_execute_interruption (thread);
4325 if (thread->pending_exception) {
4326 MonoException *exc = thread->pending_exception;
4328 thread->pending_exception = NULL;
4336 * mono_set_pending_exception:
4338 * Set the pending exception of the current thread to EXC.
4339 * The exception will be thrown when execution returns to managed code.
4342 mono_set_pending_exception (MonoException *exc)
4344 MonoInternalThread *thread = mono_thread_internal_current ();
4346 /* The thread may already be stopping */
4350 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4352 mono_thread_request_interruption (FALSE);
4356 * mono_thread_interruption_request_flag:
4358 * Returns the address of a flag that will be non-zero if an interruption has
4359 * been requested for a thread. The thread to interrupt may not be the current
4360 * thread, so an additional call to mono_thread_interruption_requested() or
4361 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4364 gint32* mono_thread_interruption_request_flag ()
4366 return &thread_interruption_requested;
4370 mono_thread_init_apartment_state (void)
4373 MonoInternalThread* thread = mono_thread_internal_current ();
4375 /* Positive return value indicates success, either
4376 * S_OK if this is first CoInitialize call, or
4377 * S_FALSE if CoInitialize already called, but with same
4378 * threading model. A negative value indicates failure,
4379 * probably due to trying to change the threading model.
4381 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4382 ? COINIT_APARTMENTTHREADED
4383 : COINIT_MULTITHREADED) < 0) {
4384 thread->apartment_state = ThreadApartmentState_Unknown;
4390 mono_thread_cleanup_apartment_state (void)
4393 MonoInternalThread* thread = mono_thread_internal_current ();
4395 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4402 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4404 LOCK_THREAD (thread);
4405 thread->state |= state;
4406 UNLOCK_THREAD (thread);
4410 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4412 LOCK_THREAD (thread);
4413 thread->state &= ~state;
4414 UNLOCK_THREAD (thread);
4418 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4420 gboolean ret = FALSE;
4422 LOCK_THREAD (thread);
4424 if ((thread->state & test) != 0) {
4428 UNLOCK_THREAD (thread);
4433 //static MonoClassField *execution_context_field;
4436 get_execution_context_addr (void)
4438 MonoDomain *domain = mono_domain_get ();
4439 guint32 offset = domain->execution_context_field_offset;
4442 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4445 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4447 mono_domain_lock (domain);
4448 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4449 mono_domain_unlock (domain);
4452 domain->execution_context_field_offset = offset;
4455 return (MonoObject**) mono_get_special_static_data (offset);
4459 mono_thread_get_execution_context (void)
4461 return *get_execution_context_addr ();
4465 mono_thread_set_execution_context (MonoObject *ec)
4467 *get_execution_context_addr () = ec;
4470 static gboolean has_tls_get = FALSE;
4473 mono_runtime_set_has_tls_get (gboolean val)
4479 mono_runtime_has_tls_get (void)
4485 mono_thread_kill (MonoInternalThread *thread, int signal)
4487 #ifdef __native_client__
4488 /* Workaround pthread_kill abort() in NaCl glibc. */
4492 /* Win32 uses QueueUserAPC and callers of this are guarded */
4493 g_assert_not_reached ();
4495 # ifdef PTHREAD_POINTER_ID
4496 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4498 # ifdef USE_TKILL_ON_ANDROID
4499 if (thread->android_tid != 0) {
4501 int old_errno = errno;
4503 ret = tkill ((pid_t) thread->android_tid, signal);
4512 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4514 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4521 self_interrupt_thread (void *_unused)
4523 MonoThreadInfo *info = mono_thread_info_current ();
4524 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4525 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4526 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4527 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4531 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4535 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4539 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4541 MonoJitInfo **dest = data;
4547 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4549 MonoJitInfo *ji = NULL;
4552 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4557 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4560 MonoThreadInfo *info = NULL;
4561 gboolean protected_wrapper;
4562 gboolean running_managed;
4564 if (!mono_thread_info_new_interrupt_enabled ()) {
4565 signal_thread_state_change (thread);
4570 FIXME this is insanely broken, it doesn't cause interruption to happen
4571 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4573 if (thread == mono_thread_internal_current ()) {
4574 /* Do it synchronously */
4575 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4577 mono_raise_exception (exc);
4578 mono_thread_info_interrupt (thread->handle);
4582 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4583 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4587 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4588 mono_thread_info_finish_suspend_and_resume (info);
4592 /*someone is already interrupting it*/
4593 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4594 mono_thread_info_finish_suspend_and_resume (info);
4597 InterlockedIncrement (&thread_interruption_requested);
4599 ji = mono_thread_info_get_last_managed (info);
4600 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4601 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4603 if (!protected_wrapper && running_managed) {
4604 /*We are in managed code*/
4605 /*Set the thread to call */
4606 if (install_async_abort)
4607 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4608 mono_thread_info_finish_suspend_and_resume (info);
4611 * This will cause waits to be broken.
4612 * It will also prevent the thread from entering a wait, so if the thread returns
4613 * from the wait before it receives the abort signal, it will just spin in the wait
4614 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4617 gpointer interrupt_handle;
4619 if (mono_thread_notify_pending_exc_fn)
4620 /* The JIT will notify the thread about the interruption */
4621 mono_thread_notify_pending_exc_fn (info);
4623 interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4624 mono_thread_info_finish_suspend_and_resume (info);
4625 mono_thread_info_finish_interrupt (interrupt_handle);
4627 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4631 transition_to_suspended (MonoInternalThread *thread, MonoThreadInfo *info)
4633 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4634 g_assert (0); /*FIXME we should not reach this */
4635 /*Make sure we balance the suspend count.*/
4637 mono_thread_info_finish_suspend_and_resume (info);
4639 thread->state &= ~ThreadState_SuspendRequested;
4640 thread->state |= ThreadState_Suspended;
4642 mono_thread_info_finish_suspend (info);
4644 UNLOCK_THREAD (thread);
4648 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4650 if (!mono_thread_info_new_interrupt_enabled ()) {
4651 signal_thread_state_change (thread);
4655 LOCK_THREAD (thread);
4656 if (thread == mono_thread_internal_current ()) {
4657 transition_to_suspended (thread, NULL);
4658 mono_thread_info_self_suspend ();
4660 MonoThreadInfo *info;
4662 gboolean protected_wrapper;
4663 gboolean running_managed;
4665 /*A null info usually means the thread is already dead. */
4666 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4667 UNLOCK_THREAD (thread);
4671 ji = mono_thread_info_get_last_managed (info);
4672 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4673 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4675 if (running_managed && !protected_wrapper) {
4676 transition_to_suspended (thread, info);
4678 gpointer interrupt_handle;
4680 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4681 InterlockedIncrement (&thread_interruption_requested);
4683 interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4684 if (mono_thread_notify_pending_exc_fn && !running_managed)
4685 /* The JIT will notify the thread about the interruption */
4686 mono_thread_notify_pending_exc_fn (info);
4687 mono_thread_info_finish_suspend_and_resume (info);
4689 mono_thread_info_finish_interrupt (interrupt_handle);
4690 UNLOCK_THREAD (thread);
4695 /*This is called with @thread synch_cs held and it must release it*/
4697 self_suspend_internal (MonoInternalThread *thread)
4699 if (!mono_thread_info_new_interrupt_enabled ()) {
4700 thread->state &= ~ThreadState_SuspendRequested;
4701 thread->state |= ThreadState_Suspended;
4702 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4703 if (thread->suspend_event == NULL) {
4704 UNLOCK_THREAD (thread);
4707 if (thread->suspended_event)
4708 SetEvent (thread->suspended_event);
4710 UNLOCK_THREAD (thread);
4712 if (shutting_down) {
4713 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4718 WaitForSingleObject (thread->suspend_event, INFINITE);
4720 LOCK_THREAD (thread);
4722 CloseHandle (thread->suspend_event);
4723 thread->suspend_event = NULL;
4724 thread->state &= ~ThreadState_Suspended;
4726 /* The thread that requested the resume will have replaced this event
4727 * and will be waiting for it
4729 SetEvent (thread->resume_event);
4731 UNLOCK_THREAD (thread);
4735 transition_to_suspended (thread, NULL);
4736 mono_thread_info_self_suspend ();
4739 /*This is called with @thread synch_cs held and it must release it*/
4741 resume_thread_internal (MonoInternalThread *thread)
4743 if (!mono_thread_info_new_interrupt_enabled ()) {
4744 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4745 if (thread->resume_event == NULL) {
4746 UNLOCK_THREAD (thread);
4750 /* Awake the thread */
4751 SetEvent (thread->suspend_event);
4753 UNLOCK_THREAD (thread);
4755 /* Wait for the thread to awake */
4756 WaitForSingleObject (thread->resume_event, INFINITE);
4757 CloseHandle (thread->resume_event);
4758 thread->resume_event = NULL;
4762 UNLOCK_THREAD (thread);
4763 /* Awake the thread */
4764 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4766 LOCK_THREAD (thread);
4767 thread->state &= ~ThreadState_Suspended;
4768 UNLOCK_THREAD (thread);
4774 * mono_thread_is_foreign:
4775 * @thread: the thread to query
4777 * This function allows one to determine if a thread was created by the mono runtime and has
4778 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4780 * Returns: true if @thread was not created by the runtime.
4783 mono_thread_is_foreign (MonoThread *thread)
4785 MonoThreadInfo *info = thread->internal_thread->thread_info;
4786 return info->runtime_thread == FALSE;
4790 * mono_add_joinable_thread:
4792 * Add TID to the list of joinable threads.
4793 * LOCKING: Acquires the threads lock.
4796 mono_threads_add_joinable_thread (gpointer tid)
4800 * We cannot detach from threads because it causes problems like
4801 * 2fd16f60/r114307. So we collect them and join them when
4802 * we have time (in he finalizer thread).
4804 joinable_threads_lock ();
4805 if (!joinable_threads)
4806 joinable_threads = g_hash_table_new (NULL, NULL);
4807 g_hash_table_insert (joinable_threads, tid, tid);
4808 joinable_thread_count ++;
4809 joinable_threads_unlock ();
4811 mono_gc_finalize_notify ();
4816 * mono_threads_join_threads:
4818 * Join all joinable threads. This is called from the finalizer thread.
4819 * LOCKING: Acquires the threads lock.
4822 mono_threads_join_threads (void)
4825 GHashTableIter iter;
4832 if (!joinable_thread_count)
4836 joinable_threads_lock ();
4838 if (g_hash_table_size (joinable_threads)) {
4839 g_hash_table_iter_init (&iter, joinable_threads);
4840 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4841 thread = (pthread_t)tid;
4842 g_hash_table_remove (joinable_threads, key);
4843 joinable_thread_count --;
4846 joinable_threads_unlock ();
4848 if (thread != pthread_self ())
4849 /* This shouldn't block */
4850 pthread_join (thread, NULL);
4861 * Wait for thread TID to exit.
4862 * LOCKING: Acquires the threads lock.
4865 mono_thread_join (gpointer tid)
4869 gboolean found = FALSE;
4871 joinable_threads_lock ();
4872 if (!joinable_threads)
4873 joinable_threads = g_hash_table_new (NULL, NULL);
4874 if (g_hash_table_lookup (joinable_threads, tid)) {
4875 g_hash_table_remove (joinable_threads, tid);
4876 joinable_thread_count --;
4879 joinable_threads_unlock ();
4882 thread = (pthread_t)tid;
4883 pthread_join (thread, NULL);