2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threadpool.h>
25 #include <mono/metadata/threads-types.h>
26 #include <mono/metadata/exception.h>
27 #include <mono/metadata/environment.h>
28 #include <mono/metadata/monitor.h>
29 #include <mono/metadata/gc-internal.h>
30 #include <mono/metadata/marshal.h>
31 #include <mono/metadata/runtime.h>
32 #include <mono/io-layer/io-layer.h>
33 #include <mono/metadata/object-internals.h>
34 #include <mono/metadata/mono-debug-debugger.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
45 #include <mono/metadata/gc-internal.h>
47 #ifdef PLATFORM_ANDROID
50 extern int tkill (pid_t tid, int signal);
53 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
54 #define THREAD_DEBUG(a)
55 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
56 #define THREAD_WAIT_DEBUG(a)
57 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
58 #define LIBGC_DEBUG(a)
60 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
61 #define SPIN_LOCK(i) do { \
62 if (SPIN_TRYLOCK (i)) \
66 #define SPIN_UNLOCK(i) i = 0
68 #define LOCK_THREAD(thread) lock_thread((thread))
69 #define UNLOCK_THREAD(thread) unlock_thread((thread))
71 /* Provide this for systems with glib < 2.6 */
72 #ifndef G_GSIZE_FORMAT
73 # if GLIB_SIZEOF_LONG == 8
74 # define G_GSIZE_FORMAT "lu"
76 # define G_GSIZE_FORMAT "u"
82 guint32 (*func)(void *);
98 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
99 struct _MonoThreadDomainTls {
100 MonoThreadDomainTls *next;
108 MonoThreadDomainTls *freelist;
111 /* Number of cached culture objects in the MonoThread->cached_culture_info array
112 * (per-type): we use the first NUM entries for CultureInfo and the last for
113 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
115 #define NUM_CACHED_CULTURES 4
116 #define CULTURES_START_IDX 0
117 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
119 /* Controls access to the 'threads' hash table */
120 #define mono_threads_lock() mono_mutex_lock (&threads_mutex)
121 #define mono_threads_unlock() mono_mutex_unlock (&threads_mutex)
122 static mono_mutex_t threads_mutex;
124 /* Controls access to context static data */
125 #define mono_contexts_lock() mono_mutex_lock (&contexts_mutex)
126 #define mono_contexts_unlock() mono_mutex_unlock (&contexts_mutex)
127 static mono_mutex_t contexts_mutex;
129 /* Controls access to the 'joinable_threads' hash table */
130 #define joinable_threads_lock() mono_mutex_lock (&joinable_threads_mutex)
131 #define joinable_threads_unlock() mono_mutex_unlock (&joinable_threads_mutex)
132 static mono_mutex_t joinable_threads_mutex;
134 /* Holds current status of static data heap */
135 static StaticDataInfo thread_static_info;
136 static StaticDataInfo context_static_info;
138 /* The hash of existing threads (key is thread ID, value is
139 * MonoInternalThread*) that need joining before exit
141 static MonoGHashTable *threads=NULL;
144 * Threads which are starting up and they are not in the 'threads' hash yet.
145 * When handle_store is called for a thread, it will be removed from this hash table.
146 * Protected by mono_threads_lock ().
148 static MonoGHashTable *threads_starting_up = NULL;
150 /* Maps a MonoThread to its start argument */
151 /* Protected by mono_threads_lock () */
152 static MonoGHashTable *thread_start_args = NULL;
154 /* The TLS key that holds the MonoObject assigned to each thread */
155 static MonoNativeTlsKey current_object_key;
158 /* Protected by the threads lock */
159 static GHashTable *joinable_threads;
160 static int joinable_thread_count;
162 #ifdef MONO_HAVE_FAST_TLS
163 /* we need to use both the Tls* functions and __thread because
164 * the gc needs to see all the threads
166 MONO_FAST_TLS_DECLARE(tls_current_object);
167 #define SET_CURRENT_OBJECT(x) do { \
168 MONO_FAST_TLS_SET (tls_current_object, x); \
169 mono_native_tls_set_value (current_object_key, x); \
171 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
173 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
174 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
177 /* function called at thread start */
178 static MonoThreadStartCB mono_thread_start_cb = NULL;
180 /* function called at thread attach */
181 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
183 /* function called at thread cleanup */
184 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
186 /* function called to notify the runtime about a pending exception on the current thread */
187 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
189 /* The default stack size for each thread */
190 static guint32 default_stacksize = 0;
191 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
193 static void thread_adjust_static_data (MonoInternalThread *thread);
194 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
195 static void mono_init_static_data_info (StaticDataInfo *static_data);
196 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
197 static gboolean mono_thread_resume (MonoInternalThread* thread);
198 static void signal_thread_state_change (MonoInternalThread *thread);
199 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
200 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
201 static void self_suspend_internal (MonoInternalThread *thread);
202 static gboolean resume_thread_internal (MonoInternalThread *thread);
204 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
205 static void ref_stack_destroy (gpointer rs);
207 /* Spin lock for InterlockedXXX 64 bit functions */
208 #define mono_interlocked_lock() mono_mutex_lock (&interlocked_mutex)
209 #define mono_interlocked_unlock() mono_mutex_unlock (&interlocked_mutex)
210 static mono_mutex_t interlocked_mutex;
212 /* global count of thread interruptions requested */
213 static gint32 thread_interruption_requested = 0;
215 /* Event signaled when a thread changes its background mode */
216 static HANDLE background_change_event;
218 static gboolean shutting_down = FALSE;
220 static gint32 managed_thread_id_counter = 0;
223 get_next_managed_thread_id (void)
225 return InterlockedIncrement (&managed_thread_id_counter);
229 mono_thread_get_tls_key (void)
231 return current_object_key;
235 mono_thread_get_tls_offset (void)
238 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
242 static inline MonoNativeThreadId
243 thread_get_tid (MonoInternalThread *thread)
245 /* We store the tid as a guint64 to keep the object layout constant between platforms */
246 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
249 /* handle_store() and handle_remove() manage the array of threads that
250 * still need to be waited for when the main thread exits.
252 * If handle_store() returns FALSE the thread must not be started
253 * because Mono is shutting down.
255 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
257 mono_threads_lock ();
259 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
261 if (threads_starting_up)
262 mono_g_hash_table_remove (threads_starting_up, thread);
264 if (shutting_down && !force_attach) {
265 mono_threads_unlock ();
270 MONO_GC_REGISTER_ROOT_FIXED (threads);
271 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
274 /* We don't need to duplicate thread->handle, because it is
275 * only closed when the thread object is finalized by the GC.
277 g_assert (thread->internal_thread);
278 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
279 thread->internal_thread);
281 mono_threads_unlock ();
286 static gboolean handle_remove(MonoInternalThread *thread)
289 gsize tid = thread->tid;
291 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
293 mono_threads_lock ();
296 /* We have to check whether the thread object for the
297 * tid is still the same in the table because the
298 * thread might have been destroyed and the tid reused
299 * in the meantime, in which case the tid would be in
300 * the table, but with another thread object.
302 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
303 mono_g_hash_table_remove (threads, (gpointer)tid);
312 mono_threads_unlock ();
314 /* Don't close the handle here, wait for the object finalizer
315 * to do it. Otherwise, the following race condition applies:
317 * 1) Thread exits (and handle_remove() closes the handle)
319 * 2) Some other handle is reassigned the same slot
321 * 3) Another thread tries to join the first thread, and
322 * blocks waiting for the reassigned handle to be signalled
323 * (which might never happen). This is possible, because the
324 * thread calling Join() still has a reference to the first
330 static void ensure_synch_cs_set (MonoInternalThread *thread)
332 mono_mutex_t *synch_cs;
334 if (thread->synch_cs != NULL) {
338 synch_cs = g_new0 (mono_mutex_t, 1);
339 mono_mutex_init_recursive (synch_cs);
341 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
342 synch_cs, NULL) != NULL) {
343 /* Another thread must have installed this CS */
344 mono_mutex_destroy (synch_cs);
350 lock_thread (MonoInternalThread *thread)
352 if (!thread->synch_cs)
353 ensure_synch_cs_set (thread);
355 g_assert (thread->synch_cs);
356 mono_mutex_lock (thread->synch_cs);
360 unlock_thread (MonoInternalThread *thread)
362 mono_mutex_unlock (thread->synch_cs);
366 * NOTE: this function can be called also for threads different from the current one:
367 * make sure no code called from it will ever assume it is run on the thread that is
368 * getting cleaned up.
370 static void thread_cleanup (MonoInternalThread *thread)
372 g_assert (thread != NULL);
374 if (thread->abort_state_handle) {
375 mono_gchandle_free (thread->abort_state_handle);
376 thread->abort_state_handle = 0;
378 thread->abort_exc = NULL;
379 thread->current_appcontext = NULL;
382 * This is necessary because otherwise we might have
383 * cross-domain references which will not get cleaned up when
384 * the target domain is unloaded.
386 if (thread->cached_culture_info) {
388 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
389 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
393 * thread->synch_cs can be NULL if this was called after
394 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
395 * This can happen only during shutdown.
396 * The shutting_down flag is not always set, so we can't assert on it.
398 if (thread->synch_cs)
399 LOCK_THREAD (thread);
401 thread->state |= ThreadState_Stopped;
402 thread->state &= ~ThreadState_Background;
404 if (thread->synch_cs)
405 UNLOCK_THREAD (thread);
408 An interruption request has leaked to cleanup. Adjust the global counter.
410 This can happen is the abort source thread finds the abortee (this) thread
411 in unmanaged code. If this thread never trips back to managed code or check
412 the local flag it will be left set and positively unbalance the global counter.
414 Leaving the counter unbalanced will cause a performance degradation since all threads
415 will now keep checking their local flags all the time.
417 if (InterlockedExchange (&thread->interruption_requested, 0))
418 InterlockedDecrement (&thread_interruption_requested);
420 /* if the thread is not in the hash it has been removed already */
421 if (!handle_remove (thread)) {
422 if (thread == mono_thread_internal_current ()) {
423 mono_domain_unset ();
424 mono_memory_barrier ();
426 /* This needs to be called even if handle_remove () fails */
427 if (mono_thread_cleanup_fn)
428 mono_thread_cleanup_fn (thread);
431 mono_release_type_locks (thread);
433 mono_profiler_thread_end (thread->tid);
435 if (thread == mono_thread_internal_current ()) {
437 * This will signal async signal handlers that the thread has exited.
438 * The profiler callback needs this to be set, so it cannot be done earlier.
440 mono_domain_unset ();
441 mono_memory_barrier ();
444 if (thread == mono_thread_internal_current ())
445 mono_thread_pop_appdomain_ref ();
447 thread->cached_culture_info = NULL;
449 mono_free_static_data (thread->static_data, TRUE);
450 thread->static_data = NULL;
451 ref_stack_destroy (thread->appdomain_refs);
452 thread->appdomain_refs = NULL;
454 if (mono_thread_cleanup_fn)
455 mono_thread_cleanup_fn (thread);
457 if (mono_gc_is_moving ()) {
458 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
459 thread->thread_pinning_ref = NULL;
464 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
467 g_assert ((offset & 0x80000000) == 0);
468 offset &= 0x7fffffff;
469 idx = (offset >> 24) - 1;
470 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
474 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
476 static MonoClassField *current_thread_field = NULL;
480 if (!current_thread_field) {
481 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
482 g_assert (current_thread_field);
485 mono_class_vtable (domain, mono_defaults.thread_class);
486 mono_domain_lock (domain);
487 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
488 mono_domain_unlock (domain);
491 return get_thread_static_data (thread, offset);
495 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
497 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
499 g_assert (current->obj.vtable->domain == domain);
501 g_assert (!*current_thread_ptr);
502 *current_thread_ptr = current;
506 create_thread_object (MonoDomain *domain)
508 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
509 return (MonoThread*)mono_gc_alloc_mature (vt);
513 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
515 MonoThread *thread = create_thread_object (domain);
516 MONO_OBJECT_SETREF (thread, internal_thread, internal);
520 static MonoInternalThread*
521 create_internal_thread (void)
523 MonoInternalThread *thread;
526 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
527 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
529 thread->synch_cs = g_new0 (mono_mutex_t, 1);
530 mono_mutex_init_recursive (thread->synch_cs);
532 thread->apartment_state = ThreadApartmentState_Unknown;
533 thread->managed_id = get_next_managed_thread_id ();
534 if (mono_gc_is_moving ()) {
535 thread->thread_pinning_ref = thread;
536 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
543 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
545 MonoDomain *domain = mono_get_root_domain ();
547 if (!candidate || candidate->obj.vtable->domain != domain)
548 candidate = new_thread_with_internal (domain, thread);
549 set_current_thread_for_domain (domain, thread, candidate);
550 g_assert (!thread->root_domain_thread);
551 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
554 static guint32 WINAPI start_wrapper_internal(void *data)
556 MonoThreadInfo *info;
557 StartInfo *start_info = (StartInfo *)data;
558 guint32 (*start_func)(void *);
562 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
565 MonoInternalThread *internal = start_info->obj->internal_thread;
566 MonoObject *start_delegate = start_info->delegate;
567 MonoDomain *domain = start_info->obj->obj.vtable->domain;
569 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
571 /* We can be sure start_info->obj->tid and
572 * start_info->obj->handle have been set, because the thread
573 * was created suspended, and these values were set before the
577 info = mono_thread_info_current ();
579 internal->thread_info = info;
584 SET_CURRENT_OBJECT (internal);
586 mono_monitor_init_tls ();
588 /* Every thread references the appdomain which created it */
589 mono_thread_push_appdomain_ref (domain);
591 if (!mono_domain_set (domain, FALSE)) {
592 /* No point in raising an appdomain_unloaded exception here */
593 /* FIXME: Cleanup here */
594 mono_thread_pop_appdomain_ref ();
598 start_func = start_info->func;
599 start_arg = start_info->start_arg;
601 /* We have to do this here because mono_thread_new_init()
602 requires that root_domain_thread is set up. */
603 thread_adjust_static_data (internal);
604 init_root_domain_thread (internal, start_info->obj);
606 /* This MUST be called before any managed code can be
607 * executed, as it calls the callback function that (for the
608 * jit) sets the lmf marker.
610 mono_thread_new_init (tid, &tid, start_func);
611 internal->stack_ptr = &tid;
613 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
615 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
617 /* On 2.0 profile (and higher), set explicitly since state might have been
619 if (internal->apartment_state == ThreadApartmentState_Unknown)
620 internal->apartment_state = ThreadApartmentState_MTA;
622 mono_thread_init_apartment_state ();
624 if(internal->start_notify!=NULL) {
625 /* Let the thread that called Start() know we're
628 ReleaseSemaphore (internal->start_notify, 1, NULL);
631 mono_threads_lock ();
632 mono_g_hash_table_remove (thread_start_args, start_info->obj);
633 mono_threads_unlock ();
635 mono_thread_set_execution_context (start_info->obj->ec_to_set);
636 start_info->obj->ec_to_set = NULL;
639 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
643 * Call this after calling start_notify, since the profiler callback might want
644 * to lock the thread, and the lock is held by thread_start () which waits for
647 mono_profiler_thread_start (tid);
649 /* if the name was set before starting, we didn't invoke the profiler callback */
650 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
651 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
652 mono_profiler_thread_name (internal->tid, tname);
655 /* start_func is set only for unmanaged start functions */
657 start_func (start_arg);
660 g_assert (start_delegate != NULL);
661 args [0] = start_arg;
662 /* we may want to handle the exception here. See comment below on unhandled exceptions */
663 mono_runtime_delegate_invoke (start_delegate, args, NULL);
666 /* If the thread calls ExitThread at all, this remaining code
667 * will not be executed, but the main thread will eventually
668 * call thread_cleanup() on this thread's behalf.
671 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
673 /* Do any cleanup needed for apartment state. This
674 * cannot be done in thread_cleanup since thread_cleanup could be
675 * called for a thread other than the current thread.
676 * mono_thread_cleanup_apartment_state cleans up apartment
677 * for the current thead */
678 mono_thread_cleanup_apartment_state ();
680 thread_cleanup (internal);
684 /* Remove the reference to the thread object in the TLS data,
685 * so the thread object can be finalized. This won't be
686 * reached if the thread threw an uncaught exception, so those
687 * thread handles will stay referenced :-( (This is due to
688 * missing support for scanning thread-specific data in the
689 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
692 SET_CURRENT_OBJECT (NULL);
697 static guint32 WINAPI start_wrapper(void *data)
701 /* Avoid scanning the frames above this frame during a GC */
702 mono_gc_set_stack_end ((void*)&dummy);
704 return start_wrapper_internal (data);
710 * Common thread creation code.
711 * LOCKING: Acquires the threads lock.
714 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
715 gboolean throw_on_failure)
717 HANDLE thread_handle;
718 MonoNativeThreadId tid;
719 guint32 create_flags;
722 * Join joinable threads to prevent running out of threads since the finalizer
723 * thread might be blocked/backlogged.
725 mono_threads_join_threads ();
727 mono_threads_lock ();
730 mono_threads_unlock ();
734 * The thread start argument may be an object reference, and there is
735 * no ref to keep it alive when the new thread is started but not yet
736 * registered with the collector. So we store it in a GC tracked hash
739 if (thread_start_args == NULL) {
740 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
741 thread_start_args = mono_g_hash_table_new (NULL, NULL);
743 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
744 if (threads_starting_up == NULL) {
745 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
746 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
748 mono_g_hash_table_insert (threads_starting_up, thread, thread);
749 mono_threads_unlock ();
751 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
752 if (!internal->start_notify) {
753 mono_threads_lock ();
754 mono_g_hash_table_remove (threads_starting_up, thread);
755 mono_threads_unlock ();
756 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
762 stack_size = default_stacksize_for_thread (internal);
764 /* Create suspended, so we can do some housekeeping before the thread
767 create_flags = CREATE_SUSPENDED;
768 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
769 stack_size, create_flags, &tid);
770 if (thread_handle == NULL) {
771 /* The thread couldn't be created, so throw an exception */
772 mono_threads_lock ();
773 mono_g_hash_table_remove (threads_starting_up, thread);
774 mono_threads_unlock ();
776 if (throw_on_failure)
777 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
779 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
782 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
784 internal->handle = thread_handle;
785 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
787 internal->threadpool_thread = threadpool_thread;
788 if (threadpool_thread)
789 mono_thread_set_state (internal, ThreadState_Background);
791 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
793 /* Only store the handle when the thread is about to be
794 * launched, to avoid the main thread deadlocking while trying
795 * to clean up a thread that will never be signalled.
797 if (!handle_store (thread, FALSE))
800 mono_thread_info_resume (tid);
802 if (internal->start_notify) {
804 * Wait for the thread to set up its TLS data etc, so
805 * theres no potential race condition if someone tries
806 * to look up the data believing the thread has
809 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
811 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
812 CloseHandle (internal->start_notify);
813 internal->start_notify = NULL;
816 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
821 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
823 if (mono_thread_start_cb) {
824 mono_thread_start_cb (tid, stack_start, func);
828 void mono_threads_set_default_stacksize (guint32 stacksize)
830 default_stacksize = stacksize;
833 guint32 mono_threads_get_default_stacksize (void)
835 return default_stacksize;
839 * mono_thread_create_internal:
843 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
846 MonoInternalThread *internal;
847 StartInfo *start_info;
850 thread = create_thread_object (domain);
851 internal = create_internal_thread ();
852 MONO_OBJECT_SETREF (thread, internal_thread, internal);
854 start_info = g_new0 (StartInfo, 1);
855 start_info->func = func;
856 start_info->obj = thread;
857 start_info->start_arg = arg;
859 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
863 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
864 if (mono_check_corlib_version () == NULL)
865 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
871 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
873 mono_thread_create_internal (domain, func, arg, FALSE, 0);
877 mono_thread_attach (MonoDomain *domain)
879 return mono_thread_attach_full (domain, FALSE);
883 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
885 MonoThreadInfo *info;
886 MonoInternalThread *thread;
887 MonoThread *current_thread;
888 HANDLE thread_handle;
891 if ((thread = mono_thread_internal_current ())) {
892 if (domain != mono_domain_get ())
893 mono_domain_set (domain, TRUE);
894 /* Already attached */
895 return mono_thread_current ();
898 if (!mono_gc_register_thread (&domain)) {
899 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 ());
902 thread = create_internal_thread ();
904 thread_handle = mono_thread_info_open_handle ();
905 g_assert (thread_handle);
907 tid=GetCurrentThreadId ();
909 thread->handle=thread_handle;
911 #ifdef PLATFORM_ANDROID
912 thread->android_tid = (gpointer) gettid ();
914 thread->stack_ptr = &tid;
916 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
918 info = mono_thread_info_current ();
920 thread->thread_info = info;
922 current_thread = new_thread_with_internal (domain, thread);
924 if (!handle_store (current_thread, force_attach)) {
925 /* Mono is shutting down, so just wait for the end */
930 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
932 SET_CURRENT_OBJECT (thread);
933 mono_domain_set (domain, TRUE);
935 mono_monitor_init_tls ();
937 thread_adjust_static_data (thread);
939 init_root_domain_thread (thread, current_thread);
940 if (domain != mono_get_root_domain ())
941 set_current_thread_for_domain (domain, thread, current_thread);
944 if (mono_thread_attach_cb) {
948 mono_thread_info_get_stack_bounds (&staddr, &stsize);
951 mono_thread_attach_cb (tid, &tid);
953 mono_thread_attach_cb (tid, staddr + stsize);
956 // FIXME: Need a separate callback
957 mono_profiler_thread_start (tid);
959 return current_thread;
963 mono_thread_detach_internal (MonoInternalThread *thread)
965 g_return_if_fail (thread != NULL);
967 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
969 thread_cleanup (thread);
971 SET_CURRENT_OBJECT (NULL);
972 mono_domain_unset ();
974 /* Don't need to CloseHandle this thread, even though we took a
975 * reference in mono_thread_attach (), because the GC will do it
976 * when the Thread object is finalised.
981 mono_thread_detach (MonoThread *thread)
984 mono_thread_detach_internal (thread->internal_thread);
988 * mono_thread_detach_if_exiting:
990 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
991 * This should be used at the end of embedding code which calls into managed code, and which
992 * can be called from pthread dtors, like dealloc: implementations in objective-c.
995 mono_thread_detach_if_exiting (void)
997 if (mono_thread_info_is_exiting ()) {
998 MonoInternalThread *thread;
1000 thread = mono_thread_internal_current ();
1002 mono_thread_detach_internal (thread);
1003 mono_thread_info_detach ();
1011 MonoInternalThread *thread = mono_thread_internal_current ();
1013 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1015 thread_cleanup (thread);
1016 SET_CURRENT_OBJECT (NULL);
1017 mono_domain_unset ();
1019 /* we could add a callback here for embedders to use. */
1020 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1021 exit (mono_environment_exitcode_get ());
1022 mono_thread_info_exit ();
1026 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1028 MonoInternalThread *internal = create_internal_thread ();
1030 internal->state = ThreadState_Unstarted;
1032 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1036 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this,
1039 StartInfo *start_info;
1040 MonoInternalThread *internal;
1043 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1045 if (!this->internal_thread)
1046 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1047 internal = this->internal_thread;
1049 LOCK_THREAD (internal);
1051 if ((internal->state & ThreadState_Unstarted) == 0) {
1052 UNLOCK_THREAD (internal);
1053 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1057 if ((internal->state & ThreadState_Aborted) != 0) {
1058 UNLOCK_THREAD (internal);
1061 /* This is freed in start_wrapper */
1062 start_info = g_new0 (StartInfo, 1);
1063 start_info->func = NULL;
1064 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1065 start_info->delegate = start;
1066 start_info->obj = this;
1067 g_assert (this->obj.vtable->domain == mono_domain_get ());
1069 res = create_thread (this, internal, start_info, FALSE, 0, FALSE);
1071 UNLOCK_THREAD (internal);
1075 internal->state &= ~ThreadState_Unstarted;
1077 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1079 UNLOCK_THREAD (internal);
1080 return internal->handle;
1084 * This is called from the finalizer of the internal thread object.
1087 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1089 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1092 * Since threads keep a reference to their thread object while running, by the time this function is called,
1093 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1094 * when thread_cleanup () can be called after this.
1097 CloseHandle (thread);
1099 if (this->synch_cs) {
1100 mono_mutex_t *synch_cs = this->synch_cs;
1101 this->synch_cs = NULL;
1102 mono_mutex_destroy (synch_cs);
1107 void *name = this->name;
1113 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1116 MonoInternalThread *thread = mono_thread_internal_current ();
1118 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1120 mono_thread_current_check_pending_interrupt ();
1123 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1125 res = SleepEx(ms,TRUE);
1127 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1129 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1130 MonoException* exc = mono_thread_execute_interruption (thread);
1132 mono_raise_exception (exc);
1144 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1149 ves_icall_System_Threading_Thread_GetDomainID (void)
1151 return mono_domain_get()->domain_id;
1155 ves_icall_System_Threading_Thread_Yield (void)
1157 return mono_thread_info_yield ();
1161 * mono_thread_get_name:
1163 * Return the name of the thread. NAME_LEN is set to the length of the name.
1164 * Return NULL if the thread has no name. The returned memory is owned by the
1168 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1172 LOCK_THREAD (this_obj);
1174 if (!this_obj->name) {
1178 *name_len = this_obj->name_len;
1179 res = g_new (gunichar2, this_obj->name_len);
1180 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1183 UNLOCK_THREAD (this_obj);
1189 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1193 LOCK_THREAD (this_obj);
1195 if (!this_obj->name)
1198 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1200 UNLOCK_THREAD (this_obj);
1206 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1208 LOCK_THREAD (this_obj);
1210 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1211 UNLOCK_THREAD (this_obj);
1213 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1216 if (this_obj->name) {
1217 g_free (this_obj->name);
1218 this_obj->name_len = 0;
1221 this_obj->name = g_new (gunichar2, mono_string_length (name));
1222 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1223 this_obj->name_len = mono_string_length (name);
1226 this_obj->name = NULL;
1229 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1231 UNLOCK_THREAD (this_obj);
1233 if (this_obj->name && this_obj->tid) {
1234 char *tname = mono_string_to_utf8 (name);
1235 mono_profiler_thread_name (this_obj->tid, tname);
1236 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1242 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1244 mono_thread_set_name_internal (this_obj, name, TRUE);
1247 /* If the array is already in the requested domain, we just return it,
1248 otherwise we return a copy in that domain. */
1250 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1257 if (mono_object_domain (arr) == domain)
1260 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1261 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1266 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1268 return byte_array_to_domain (arr, mono_get_root_domain ());
1272 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1274 return byte_array_to_domain (arr, mono_domain_get ());
1278 mono_thread_current (void)
1280 MonoDomain *domain = mono_domain_get ();
1281 MonoInternalThread *internal = mono_thread_internal_current ();
1282 MonoThread **current_thread_ptr;
1284 g_assert (internal);
1285 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1287 if (!*current_thread_ptr) {
1288 g_assert (domain != mono_get_root_domain ());
1289 *current_thread_ptr = new_thread_with_internal (domain, internal);
1291 return *current_thread_ptr;
1295 mono_thread_internal_current (void)
1297 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1298 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1302 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1303 int ms, HANDLE thread)
1305 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1308 mono_thread_current_check_pending_interrupt ();
1312 if ((this->state & ThreadState_Unstarted) != 0) {
1313 UNLOCK_THREAD (this);
1315 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1319 UNLOCK_THREAD (this);
1324 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1326 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1328 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1330 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1332 if(ret==WAIT_OBJECT_0) {
1333 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1338 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1344 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1352 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1355 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1357 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1359 if (ret != WAIT_IO_COMPLETION)
1362 exc = mono_thread_execute_interruption (thread);
1364 mono_raise_exception (exc);
1369 /* Re-calculate ms according to the time passed */
1370 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1371 if (diff_ms >= ms) {
1375 wait = ms - diff_ms;
1381 /* FIXME: exitContext isnt documented */
1382 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1388 MonoObject *waitHandle;
1389 MonoInternalThread *thread = mono_thread_internal_current ();
1391 /* Do this WaitSleepJoin check before creating objects */
1392 mono_thread_current_check_pending_interrupt ();
1394 /* We fail in managed if the array has more than 64 elements */
1395 numhandles = (guint32)mono_array_length(mono_handles);
1396 handles = g_new0(HANDLE, numhandles);
1398 for(i = 0; i < numhandles; i++) {
1399 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1400 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1407 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1409 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1411 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1415 if(ret==WAIT_FAILED) {
1416 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1418 } else if(ret==WAIT_TIMEOUT) {
1419 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1426 /* FIXME: exitContext isnt documented */
1427 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1429 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1430 uintptr_t numhandles;
1433 MonoObject *waitHandle;
1434 MonoInternalThread *thread = mono_thread_internal_current ();
1436 /* Do this WaitSleepJoin check before creating objects */
1437 mono_thread_current_check_pending_interrupt ();
1439 numhandles = mono_array_length(mono_handles);
1440 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1443 for(i = 0; i < numhandles; i++) {
1444 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1445 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1452 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1454 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1456 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1458 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1461 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1463 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1464 return ret - WAIT_OBJECT_0;
1466 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1467 return ret - WAIT_ABANDONED_0;
1474 /* FIXME: exitContext isnt documented */
1475 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1478 MonoInternalThread *thread = mono_thread_internal_current ();
1480 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1486 mono_thread_current_check_pending_interrupt ();
1488 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1490 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1492 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1494 if(ret==WAIT_FAILED) {
1495 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1497 } else if(ret==WAIT_TIMEOUT) {
1498 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1506 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1509 MonoInternalThread *thread = mono_thread_internal_current ();
1514 mono_thread_current_check_pending_interrupt ();
1516 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1518 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1520 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1522 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1525 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1532 mutex = CreateMutex (NULL, owned, NULL);
1534 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1536 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1544 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1545 return(ReleaseMutex (handle));
1548 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1554 *error = ERROR_SUCCESS;
1556 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1558 *error = GetLastError ();
1565 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1572 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1574 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1575 mono_string_chars (name));
1577 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1585 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1589 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1594 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1598 *error = ERROR_SUCCESS;
1600 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1602 *error = GetLastError ();
1608 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1615 event = CreateEvent (NULL, manual, initial, NULL);
1617 event = CreateEvent (NULL, manual, initial,
1618 mono_string_chars (name));
1620 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1628 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1629 return (SetEvent(handle));
1632 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1633 return (ResetEvent(handle));
1637 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1638 CloseHandle (handle);
1641 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1647 *error = ERROR_SUCCESS;
1649 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1651 *error = GetLastError ();
1657 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1659 return InterlockedIncrement (location);
1662 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1664 #if SIZEOF_VOID_P == 4
1665 if (G_UNLIKELY ((size_t)location & 0x7)) {
1667 mono_interlocked_lock ();
1670 mono_interlocked_unlock ();
1674 return InterlockedIncrement64 (location);
1677 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1679 return InterlockedDecrement(location);
1682 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1684 #if SIZEOF_VOID_P == 4
1685 if (G_UNLIKELY ((size_t)location & 0x7)) {
1687 mono_interlocked_lock ();
1690 mono_interlocked_unlock ();
1694 return InterlockedDecrement64 (location);
1697 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1699 return InterlockedExchange(location, value);
1702 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1705 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1706 mono_gc_wbarrier_generic_nostore (location);
1710 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1712 return InterlockedExchangePointer(location, value);
1715 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1717 IntFloatUnion val, ret;
1720 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1726 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1728 #if SIZEOF_VOID_P == 4
1729 if (G_UNLIKELY ((size_t)location & 0x7)) {
1731 mono_interlocked_lock ();
1734 mono_interlocked_unlock ();
1738 return InterlockedExchange64 (location, value);
1742 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1744 LongDoubleUnion val, ret;
1747 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1752 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1754 return InterlockedCompareExchange(location, value, comparand);
1757 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1760 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1761 mono_gc_wbarrier_generic_nostore (location);
1765 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1767 return InterlockedCompareExchangePointer(location, value, comparand);
1770 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1772 IntFloatUnion val, ret, cmp;
1775 cmp.fval = comparand;
1776 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1782 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1784 #if SIZEOF_VOID_P == 8
1785 LongDoubleUnion val, comp, ret;
1788 comp.fval = comparand;
1789 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1795 mono_interlocked_lock ();
1797 if (old == comparand)
1799 mono_interlocked_unlock ();
1806 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1808 #if SIZEOF_VOID_P == 4
1809 if (G_UNLIKELY ((size_t)location & 0x7)) {
1811 mono_interlocked_lock ();
1813 if (old == comparand)
1815 mono_interlocked_unlock ();
1819 return InterlockedCompareExchange64 (location, value, comparand);
1823 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1826 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1827 mono_gc_wbarrier_generic_nostore (location);
1832 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1835 res = InterlockedExchangePointer ((gpointer *)location, value);
1836 mono_gc_wbarrier_generic_nostore (location);
1841 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1843 return InterlockedAdd (location, value);
1847 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1849 #if SIZEOF_VOID_P == 4
1850 if (G_UNLIKELY ((size_t)location & 0x7)) {
1852 mono_interlocked_lock ();
1855 mono_interlocked_unlock ();
1859 return InterlockedAdd64 (location, value);
1863 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1865 #if SIZEOF_VOID_P == 4
1866 if (G_UNLIKELY ((size_t)location & 0x7)) {
1868 mono_interlocked_lock ();
1870 mono_interlocked_unlock ();
1874 return InterlockedRead64 (location);
1878 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1880 mono_memory_barrier ();
1884 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1886 mono_thread_clr_state (this, state);
1888 if (state & ThreadState_Background) {
1889 /* If the thread changes the background mode, the main thread has to
1890 * be notified, since it has to rebuild the list of threads to
1893 SetEvent (background_change_event);
1898 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1900 mono_thread_set_state (this, state);
1902 if (state & ThreadState_Background) {
1903 /* If the thread changes the background mode, the main thread has to
1904 * be notified, since it has to rebuild the list of threads to
1907 SetEvent (background_change_event);
1912 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1918 state = this->state;
1920 UNLOCK_THREAD (this);
1925 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1927 MonoInternalThread *current;
1932 current = mono_thread_internal_current ();
1934 this->thread_interrupt_requested = TRUE;
1935 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1937 UNLOCK_THREAD (this);
1940 abort_thread_internal (this, TRUE, FALSE);
1944 void mono_thread_current_check_pending_interrupt ()
1946 MonoInternalThread *thread = mono_thread_internal_current ();
1947 gboolean throw = FALSE;
1949 LOCK_THREAD (thread);
1951 if (thread->thread_interrupt_requested) {
1953 thread->thread_interrupt_requested = FALSE;
1956 UNLOCK_THREAD (thread);
1959 mono_raise_exception (mono_get_exception_thread_interrupted ());
1964 mono_thread_get_abort_signal (void)
1968 #elif defined(PLATFORM_ANDROID)
1970 #elif !defined (SIGRTMIN)
1975 #endif /* SIGUSR1 */
1977 static int abort_signum = -1;
1979 if (abort_signum != -1)
1980 return abort_signum;
1981 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
1982 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
1983 struct sigaction sinfo;
1984 sigaction (i, NULL, &sinfo);
1985 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
1990 /* fallback to the old way */
1992 #endif /* HOST_WIN32 */
1996 static void CALLBACK interruption_request_apc (ULONG_PTR param)
1998 MonoException* exc = mono_thread_request_interruption (FALSE);
1999 if (exc) mono_raise_exception (exc);
2001 #endif /* HOST_WIN32 */
2004 * signal_thread_state_change
2006 * Tells the thread that his state has changed and it has to enter the new
2007 * state as soon as possible.
2009 static void signal_thread_state_change (MonoInternalThread *thread)
2012 gpointer wait_handle;
2015 if (thread == mono_thread_internal_current ()) {
2016 /* Do it synchronously */
2017 MonoException *exc = mono_thread_request_interruption (FALSE);
2019 mono_raise_exception (exc);
2023 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, (ULONG_PTR)NULL);
2026 * This will cause waits to be broken.
2027 * It will also prevent the thread from entering a wait, so if the thread returns
2028 * from the wait before it receives the abort signal, it will just spin in the wait
2029 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2032 wait_handle = mono_thread_info_prepare_interrupt (thread->handle);
2034 /* fixme: store the state somewhere */
2035 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2037 mono_thread_info_finish_interrupt (wait_handle);
2038 #endif /* HOST_WIN32 */
2042 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2044 LOCK_THREAD (thread);
2046 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2047 (thread->state & ThreadState_StopRequested) != 0 ||
2048 (thread->state & ThreadState_Stopped) != 0)
2050 UNLOCK_THREAD (thread);
2054 if ((thread->state & ThreadState_Unstarted) != 0) {
2055 thread->state |= ThreadState_Aborted;
2056 UNLOCK_THREAD (thread);
2060 thread->state |= ThreadState_AbortRequested;
2061 if (thread->abort_state_handle)
2062 mono_gchandle_free (thread->abort_state_handle);
2064 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2065 g_assert (thread->abort_state_handle);
2067 thread->abort_state_handle = 0;
2069 thread->abort_exc = NULL;
2072 * abort_exc is set in mono_thread_execute_interruption(),
2073 * triggered by the call to signal_thread_state_change(),
2074 * below. There's a point between where we have
2075 * abort_state_handle set, but abort_exc NULL, but that's not
2079 UNLOCK_THREAD (thread);
2081 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2083 /* During shutdown, we can't wait for other threads */
2085 /* Make sure the thread is awake */
2086 mono_thread_resume (thread);
2088 abort_thread_internal (thread, TRUE, TRUE);
2092 ves_icall_System_Threading_Thread_ResetAbort (void)
2094 MonoInternalThread *thread = mono_thread_internal_current ();
2095 gboolean was_aborting;
2097 LOCK_THREAD (thread);
2098 was_aborting = thread->state & ThreadState_AbortRequested;
2099 thread->state &= ~ThreadState_AbortRequested;
2100 UNLOCK_THREAD (thread);
2102 if (!was_aborting) {
2103 const char *msg = "Unable to reset abort because no abort was requested";
2104 mono_raise_exception (mono_get_exception_thread_state (msg));
2106 thread->abort_exc = NULL;
2107 if (thread->abort_state_handle) {
2108 mono_gchandle_free (thread->abort_state_handle);
2109 /* This is actually not necessary - the handle
2110 only counts if the exception is set */
2111 thread->abort_state_handle = 0;
2116 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2118 LOCK_THREAD (thread);
2120 thread->state &= ~ThreadState_AbortRequested;
2122 if (thread->abort_exc) {
2123 thread->abort_exc = NULL;
2124 if (thread->abort_state_handle) {
2125 mono_gchandle_free (thread->abort_state_handle);
2126 /* This is actually not necessary - the handle
2127 only counts if the exception is set */
2128 thread->abort_state_handle = 0;
2132 UNLOCK_THREAD (thread);
2136 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2138 MonoInternalThread *thread = this->internal_thread;
2139 MonoObject *state, *deserialized = NULL, *exc;
2142 if (!thread->abort_state_handle)
2145 state = mono_gchandle_get_target (thread->abort_state_handle);
2148 domain = mono_domain_get ();
2149 if (mono_object_domain (state) == domain)
2152 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2154 if (!deserialized) {
2155 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2157 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2158 mono_raise_exception (invalid_op_exc);
2161 return deserialized;
2165 mono_thread_suspend (MonoInternalThread *thread)
2167 LOCK_THREAD (thread);
2169 if ((thread->state & ThreadState_Unstarted) != 0 ||
2170 (thread->state & ThreadState_Aborted) != 0 ||
2171 (thread->state & ThreadState_Stopped) != 0)
2173 UNLOCK_THREAD (thread);
2177 if ((thread->state & ThreadState_Suspended) != 0 ||
2178 (thread->state & ThreadState_SuspendRequested) != 0 ||
2179 (thread->state & ThreadState_StopRequested) != 0)
2181 UNLOCK_THREAD (thread);
2185 thread->state |= ThreadState_SuspendRequested;
2187 UNLOCK_THREAD (thread);
2189 suspend_thread_internal (thread, FALSE);
2194 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2196 if (!mono_thread_suspend (thread))
2197 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2201 mono_thread_resume (MonoInternalThread *thread)
2203 LOCK_THREAD (thread);
2205 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2206 thread->state &= ~ThreadState_SuspendRequested;
2207 UNLOCK_THREAD (thread);
2211 if ((thread->state & ThreadState_Suspended) == 0 ||
2212 (thread->state & ThreadState_Unstarted) != 0 ||
2213 (thread->state & ThreadState_Aborted) != 0 ||
2214 (thread->state & ThreadState_Stopped) != 0)
2216 UNLOCK_THREAD (thread);
2220 return resume_thread_internal (thread);
2224 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2226 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2227 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2231 mono_threads_is_critical_method (MonoMethod *method)
2233 switch (method->wrapper_type) {
2234 case MONO_WRAPPER_RUNTIME_INVOKE:
2235 case MONO_WRAPPER_XDOMAIN_INVOKE:
2236 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2243 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2248 if (mono_threads_is_critical_method (m)) {
2249 *((gboolean*)data) = TRUE;
2256 is_running_protected_wrapper (void)
2258 gboolean found = FALSE;
2259 mono_stack_walk (find_wrapper, &found);
2263 void mono_thread_internal_stop (MonoInternalThread *thread)
2265 LOCK_THREAD (thread);
2267 if ((thread->state & ThreadState_StopRequested) != 0 ||
2268 (thread->state & ThreadState_Stopped) != 0)
2270 UNLOCK_THREAD (thread);
2274 /* Make sure the thread is awake */
2275 mono_thread_resume (thread);
2277 thread->state |= ThreadState_StopRequested;
2278 thread->state &= ~ThreadState_AbortRequested;
2280 UNLOCK_THREAD (thread);
2282 abort_thread_internal (thread, TRUE, TRUE);
2285 void mono_thread_stop (MonoThread *thread)
2287 mono_thread_internal_stop (thread->internal_thread);
2291 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2294 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2299 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2302 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2307 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2310 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2315 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2318 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2323 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2326 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2327 return (void *) tmp;
2331 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2333 volatile MonoObject *tmp;
2334 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2335 return (MonoObject *) tmp;
2339 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2342 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2347 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2350 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2355 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2357 return InterlockedRead8 (ptr);
2361 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2363 return InterlockedRead16 (ptr);
2367 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2369 return InterlockedRead (ptr);
2373 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2375 #if SIZEOF_VOID_P == 4
2376 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2378 mono_interlocked_lock ();
2379 val = *(gint64*)ptr;
2380 mono_interlocked_unlock ();
2384 return InterlockedRead64 (ptr);
2388 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2390 return InterlockedReadPointer (ptr);
2394 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2398 #if SIZEOF_VOID_P == 4
2399 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2401 mono_interlocked_lock ();
2402 val = *(double*)ptr;
2403 mono_interlocked_unlock ();
2408 u.ival = InterlockedRead64 (ptr);
2414 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2418 u.ival = InterlockedRead (ptr);
2424 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2426 return InterlockedReadPointer (ptr);
2430 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2432 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2436 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2438 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2442 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2444 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2448 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2450 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2454 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2456 mono_atomic_store_release ((volatile void **) ptr, value);
2460 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2462 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2466 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2468 mono_atomic_store_release ((volatile double *) ptr, value);
2472 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2474 mono_atomic_store_release ((volatile float *) ptr, value);
2478 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2480 InterlockedWrite8 (ptr, value);
2484 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2486 InterlockedWrite16 (ptr, value);
2490 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2492 InterlockedWrite (ptr, value);
2496 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2498 #if SIZEOF_VOID_P == 4
2499 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2500 mono_interlocked_lock ();
2501 *(gint64*)ptr = value;
2502 mono_interlocked_unlock ();
2507 InterlockedWrite64 (ptr, value);
2511 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2513 InterlockedWritePointer (ptr, value);
2517 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2521 #if SIZEOF_VOID_P == 4
2522 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2523 mono_interlocked_lock ();
2524 *(double*)ptr = value;
2525 mono_interlocked_unlock ();
2532 InterlockedWrite64 (ptr, u.ival);
2536 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2542 InterlockedWrite (ptr, u.ival);
2546 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2548 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2552 mono_thread_init_tls (void)
2554 MONO_FAST_TLS_INIT (tls_current_object);
2555 mono_native_tls_alloc (¤t_object_key, NULL);
2558 void mono_thread_init (MonoThreadStartCB start_cb,
2559 MonoThreadAttachCB attach_cb)
2561 mono_mutex_init_recursive(&threads_mutex);
2562 mono_mutex_init_recursive(&interlocked_mutex);
2563 mono_mutex_init_recursive(&contexts_mutex);
2564 mono_mutex_init_recursive(&joinable_threads_mutex);
2566 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2567 g_assert(background_change_event != NULL);
2569 mono_init_static_data_info (&thread_static_info);
2570 mono_init_static_data_info (&context_static_info);
2572 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2574 mono_thread_start_cb = start_cb;
2575 mono_thread_attach_cb = attach_cb;
2577 /* Get a pseudo handle to the current process. This is just a
2578 * kludge so that wapi can build a process handle if needed.
2579 * As a pseudo handle is returned, we don't need to clean
2582 GetCurrentProcess ();
2585 void mono_thread_cleanup (void)
2587 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2588 MonoThreadInfo *info;
2590 /* The main thread must abandon any held mutexes (particularly
2591 * important for named mutexes as they are shared across
2592 * processes, see bug 74680.) This will happen when the
2593 * thread exits, but if it's not running in a subthread it
2594 * won't exit in time.
2596 info = mono_thread_info_current ();
2597 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2601 /* This stuff needs more testing, it seems one of these
2602 * critical sections can be locked when mono_thread_cleanup is
2605 mono_mutex_destroy (&threads_mutex);
2606 mono_mutex_destroy (&interlocked_mutex);
2607 mono_mutex_destroy (&contexts_mutex);
2608 mono_mutex_destroy (&delayed_free_table_mutex);
2609 mono_mutex_destroy (&small_id_mutex);
2610 CloseHandle (background_change_event);
2613 mono_native_tls_free (current_object_key);
2617 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2619 mono_thread_cleanup_fn = func;
2623 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2625 thread->internal_thread->manage_callback = func;
2628 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2630 mono_thread_notify_pending_exc_fn = func;
2634 static void print_tids (gpointer key, gpointer value, gpointer user)
2636 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2637 * sizeof(uint) and a cast to uint would overflow
2639 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2640 * print this as a pointer.
2642 g_message ("Waiting for: %p", key);
2647 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2648 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2652 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2656 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2658 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2660 if(ret==WAIT_FAILED) {
2661 /* See the comment in build_wait_tids() */
2662 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2666 for(i=0; i<wait->num; i++)
2667 CloseHandle (wait->handles[i]);
2669 if (ret == WAIT_TIMEOUT)
2672 for(i=0; i<wait->num; i++) {
2673 gsize tid = wait->threads[i]->tid;
2676 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2677 * it can still run io-layer etc. code. So wait for it to really exit.
2678 * FIXME: This won't join threads which are not in the joinable_hash yet.
2680 mono_thread_join ((gpointer)tid);
2682 mono_threads_lock ();
2683 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2684 /* This thread must have been killed, because
2685 * it hasn't cleaned itself up. (It's just
2686 * possible that the thread exited before the
2687 * parent thread had a chance to store the
2688 * handle, and now there is another pointer to
2689 * the already-exited thread stored. In this
2690 * case, we'll just get two
2691 * mono_profiler_thread_end() calls for the
2695 mono_threads_unlock ();
2696 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2697 thread_cleanup (wait->threads[i]);
2699 mono_threads_unlock ();
2704 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2706 guint32 i, ret, count;
2708 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2710 /* Add the thread state change event, so it wakes up if a thread changes
2711 * to background mode.
2714 if (count < MAXIMUM_WAIT_OBJECTS) {
2715 wait->handles [count] = background_change_event;
2719 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2721 if(ret==WAIT_FAILED) {
2722 /* See the comment in build_wait_tids() */
2723 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2727 for(i=0; i<wait->num; i++)
2728 CloseHandle (wait->handles[i]);
2730 if (ret == WAIT_TIMEOUT)
2733 if (ret < wait->num) {
2734 gsize tid = wait->threads[ret]->tid;
2735 mono_threads_lock ();
2736 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2737 /* See comment in wait_for_tids about thread cleanup */
2738 mono_threads_unlock ();
2739 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2740 thread_cleanup (wait->threads [ret]);
2742 mono_threads_unlock ();
2746 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2748 struct wait_data *wait=(struct wait_data *)user;
2750 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2752 MonoInternalThread *thread=(MonoInternalThread *)value;
2754 /* Ignore background threads, we abort them later */
2755 /* Do not lock here since it is not needed and the caller holds threads_lock */
2756 if (thread->state & ThreadState_Background) {
2757 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2758 return; /* just leave, ignore */
2761 if (mono_gc_is_finalizer_internal_thread (thread)) {
2762 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2766 if (thread == mono_thread_internal_current ()) {
2767 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2771 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2772 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2776 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2777 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2781 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2782 if (handle == NULL) {
2783 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2787 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2788 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2789 wait->handles[wait->num]=handle;
2790 wait->threads[wait->num]=thread;
2793 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2795 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2800 /* Just ignore the rest, we can't do anything with
2807 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2809 struct wait_data *wait=(struct wait_data *)user;
2810 gsize self = GetCurrentThreadId ();
2811 MonoInternalThread *thread = value;
2814 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2817 /* The finalizer thread is not a background thread */
2818 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2819 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2821 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2825 /* printf ("A: %d\n", wait->num); */
2826 wait->handles[wait->num]=thread->handle;
2827 wait->threads[wait->num]=thread;
2830 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2831 mono_thread_internal_stop (thread);
2835 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2839 * mono_threads_set_shutting_down:
2841 * Is called by a thread that wants to shut down Mono. If the runtime is already
2842 * shutting down, the calling thread is suspended/stopped, and this function never
2846 mono_threads_set_shutting_down (void)
2848 MonoInternalThread *current_thread = mono_thread_internal_current ();
2850 mono_threads_lock ();
2852 if (shutting_down) {
2853 mono_threads_unlock ();
2855 /* Make sure we're properly suspended/stopped */
2857 LOCK_THREAD (current_thread);
2859 if ((current_thread->state & ThreadState_SuspendRequested) ||
2860 (current_thread->state & ThreadState_AbortRequested) ||
2861 (current_thread->state & ThreadState_StopRequested)) {
2862 UNLOCK_THREAD (current_thread);
2863 mono_thread_execute_interruption (current_thread);
2865 current_thread->state |= ThreadState_Stopped;
2866 UNLOCK_THREAD (current_thread);
2869 /*since we're killing the thread, unset the current domain.*/
2870 mono_domain_unset ();
2872 /* Wake up other threads potentially waiting for us */
2873 mono_thread_info_exit ();
2875 shutting_down = TRUE;
2877 /* Not really a background state change, but this will
2878 * interrupt the main thread if it is waiting for all
2879 * the other threads.
2881 SetEvent (background_change_event);
2883 mono_threads_unlock ();
2887 void mono_thread_manage (void)
2889 struct wait_data wait_data;
2890 struct wait_data *wait = &wait_data;
2892 memset (wait, 0, sizeof (struct wait_data));
2893 /* join each thread that's still running */
2894 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2896 mono_threads_lock ();
2898 THREAD_DEBUG (g_message("%s: No threads", __func__));
2899 mono_threads_unlock ();
2902 mono_threads_unlock ();
2905 mono_threads_lock ();
2906 if (shutting_down) {
2907 /* somebody else is shutting down */
2908 mono_threads_unlock ();
2911 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2912 mono_g_hash_table_foreach (threads, print_tids, NULL));
2914 ResetEvent (background_change_event);
2916 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2917 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2918 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2919 mono_threads_unlock ();
2921 /* Something to wait for */
2922 wait_for_tids_or_state_change (wait, INFINITE);
2924 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2925 } while(wait->num>0);
2927 /* Mono is shutting down, so just wait for the end */
2928 if (!mono_runtime_try_shutdown ()) {
2929 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2930 mono_thread_suspend (mono_thread_internal_current ());
2931 mono_thread_execute_interruption (mono_thread_internal_current ());
2935 * Remove everything but the finalizer thread and self.
2936 * Also abort all the background threads
2939 mono_threads_lock ();
2942 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2943 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2944 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2946 mono_threads_unlock ();
2948 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2950 /* Something to wait for */
2951 wait_for_tids (wait, INFINITE);
2953 } while (wait->num > 0);
2956 * give the subthreads a chance to really quit (this is mainly needed
2957 * to get correct user and system times from getrusage/wait/time(1)).
2958 * This could be removed if we avoid pthread_detach() and use pthread_join().
2960 mono_thread_info_yield ();
2963 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2965 MonoInternalThread *thread=(MonoInternalThread *)value;
2967 if(thread->tid != (gsize)user) {
2968 /*TerminateThread (thread->handle, -1);*/
2972 void mono_thread_abort_all_other_threads (void)
2974 gsize self = GetCurrentThreadId ();
2976 mono_threads_lock ();
2977 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2978 mono_g_hash_table_size (threads));
2979 mono_g_hash_table_foreach (threads, print_tids, NULL));
2981 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2983 mono_threads_unlock ();
2987 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2989 MonoInternalThread *thread = (MonoInternalThread*)value;
2990 struct wait_data *wait = (struct wait_data*)user_data;
2994 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2996 * This needs no locking.
2998 if ((thread->state & ThreadState_Suspended) != 0 ||
2999 (thread->state & ThreadState_Stopped) != 0)
3002 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3003 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3007 wait->handles [wait->num] = handle;
3008 wait->threads [wait->num] = thread;
3014 * mono_thread_suspend_all_other_threads:
3016 * Suspend all managed threads except the finalizer thread and this thread. It is
3017 * not possible to resume them later.
3019 void mono_thread_suspend_all_other_threads (void)
3021 struct wait_data wait_data;
3022 struct wait_data *wait = &wait_data;
3024 gsize self = GetCurrentThreadId ();
3026 guint32 eventidx = 0;
3027 gboolean starting, finished;
3029 memset (wait, 0, sizeof (struct wait_data));
3031 * The other threads could be in an arbitrary state at this point, i.e.
3032 * they could be starting up, shutting down etc. This means that there could be
3033 * threads which are not even in the threads hash table yet.
3037 * First we set a barrier which will be checked by all threads before they
3038 * are added to the threads hash table, and they will exit if the flag is set.
3039 * This ensures that no threads could be added to the hash later.
3040 * We will use shutting_down as the barrier for now.
3042 g_assert (shutting_down);
3045 * We make multiple calls to WaitForMultipleObjects since:
3046 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3047 * - some threads could exit without becoming suspended
3052 * Make a copy of the hashtable since we can't do anything with
3053 * threads while threads_mutex is held.
3056 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3057 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3058 mono_threads_lock ();
3059 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3060 mono_threads_unlock ();
3062 events = g_new0 (gpointer, wait->num);
3064 /* Get the suspended events that we'll be waiting for */
3065 for (i = 0; i < wait->num; ++i) {
3066 MonoInternalThread *thread = wait->threads [i];
3067 gboolean signal_suspend = FALSE;
3069 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3070 //CloseHandle (wait->handles [i]);
3071 wait->threads [i] = NULL; /* ignore this thread in next loop */
3075 LOCK_THREAD (thread);
3077 if (thread->suspended_event == NULL) {
3078 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3079 if (thread->suspended_event == NULL) {
3080 /* Forget this one and go on to the next */
3081 UNLOCK_THREAD (thread);
3086 if ((thread->state & ThreadState_Suspended) != 0 ||
3087 (thread->state & ThreadState_StopRequested) != 0 ||
3088 (thread->state & ThreadState_Stopped) != 0) {
3089 UNLOCK_THREAD (thread);
3090 CloseHandle (wait->handles [i]);
3091 wait->threads [i] = NULL; /* ignore this thread in next loop */
3095 if ((thread->state & ThreadState_SuspendRequested) == 0)
3096 signal_suspend = TRUE;
3098 events [eventidx++] = thread->suspended_event;
3100 /* Convert abort requests into suspend requests */
3101 if ((thread->state & ThreadState_AbortRequested) != 0)
3102 thread->state &= ~ThreadState_AbortRequested;
3104 thread->state |= ThreadState_SuspendRequested;
3106 UNLOCK_THREAD (thread);
3108 /* Signal the thread to suspend */
3109 if (mono_thread_info_new_interrupt_enabled ())
3110 suspend_thread_internal (thread, TRUE);
3111 else if (signal_suspend)
3112 signal_thread_state_change (thread);
3115 /*Only wait on the suspend event if we are using the old path */
3116 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3117 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3118 for (i = 0; i < wait->num; ++i) {
3119 MonoInternalThread *thread = wait->threads [i];
3124 LOCK_THREAD (thread);
3125 if ((thread->state & ThreadState_Suspended) != 0) {
3126 CloseHandle (thread->suspended_event);
3127 thread->suspended_event = NULL;
3129 UNLOCK_THREAD (thread);
3133 if (eventidx <= 0) {
3135 * If there are threads which are starting up, we wait until they
3136 * are suspended when they try to register in the threads hash.
3137 * This is guaranteed to finish, since the threads which can create new
3138 * threads get suspended after a while.
3139 * FIXME: The finalizer thread can still create new threads.
3141 mono_threads_lock ();
3142 if (threads_starting_up)
3143 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3146 mono_threads_unlock ();
3158 collect_threads (gpointer key, gpointer value, gpointer user_data)
3160 MonoInternalThread *thread = (MonoInternalThread*)value;
3161 struct wait_data *wait = (struct wait_data*)user_data;
3164 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3165 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3169 wait->handles [wait->num] = handle;
3170 wait->threads [wait->num] = thread;
3175 static gboolean thread_dump_requested;
3177 static G_GNUC_UNUSED gboolean
3178 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3180 GString *p = (GString*)data;
3181 MonoMethod *method = NULL;
3183 method = mono_jit_info_get_method (frame->ji);
3186 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3187 g_string_append_printf (p, " %s\n", location);
3190 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3196 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3198 GString* text = g_string_new (0);
3200 GError *error = NULL;
3203 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3205 g_string_append_printf (text, "\n\"%s\"", name);
3208 else if (thread->threadpool_thread)
3209 g_string_append (text, "\n\"<threadpool thread>\"");
3211 g_string_append (text, "\n\"<unnamed thread>\"");
3214 /* This no longer works with remote unwinding */
3216 wapi_desc = wapi_current_thread_desc ();
3217 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3222 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3223 mono_thread_info_finish_suspend_and_resume (info);
3225 fprintf (stdout, "%s", text->str);
3227 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3228 OutputDebugStringA(text->str);
3231 g_string_free (text, TRUE);
3236 dump_thread (gpointer key, gpointer value, gpointer user)
3238 MonoInternalThread *thread = (MonoInternalThread *)value;
3239 MonoThreadInfo *info;
3241 if (thread == mono_thread_internal_current ())
3245 FIXME This still can hang if we stop a thread during malloc.
3246 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3247 that takes a callback and runs it with the target suspended.
3248 We probably should loop a bit around trying to get it to either managed code
3251 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3256 print_thread_dump (thread, info);
3260 mono_threads_perform_thread_dump (void)
3262 if (!thread_dump_requested)
3265 printf ("Full thread dump:\n");
3267 /* We take the loader lock and the root domain lock as to increase our odds of not deadlocking if
3268 something needs then in the process.
3270 mono_loader_lock ();
3271 mono_domain_lock (mono_get_root_domain ());
3273 mono_threads_lock ();
3274 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3275 mono_threads_unlock ();
3277 mono_domain_unlock (mono_get_root_domain ());
3278 mono_loader_unlock ();
3280 thread_dump_requested = FALSE;
3284 * mono_threads_request_thread_dump:
3286 * Ask all threads except the current to print their stacktrace to stdout.
3289 mono_threads_request_thread_dump (void)
3291 struct wait_data wait_data;
3292 struct wait_data *wait = &wait_data;
3295 /*The new thread dump code runs out of the finalizer thread. */
3296 if (mono_thread_info_new_interrupt_enabled ()) {
3297 thread_dump_requested = TRUE;
3298 mono_gc_finalize_notify ();
3303 memset (wait, 0, sizeof (struct wait_data));
3306 * Make a copy of the hashtable since we can't do anything with
3307 * threads while threads_mutex is held.
3309 mono_threads_lock ();
3310 mono_g_hash_table_foreach (threads, collect_threads, wait);
3311 mono_threads_unlock ();
3313 for (i = 0; i < wait->num; ++i) {
3314 MonoInternalThread *thread = wait->threads [i];
3316 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3317 (thread != mono_thread_internal_current ()) &&
3318 !thread->thread_dump_requested) {
3319 thread->thread_dump_requested = TRUE;
3321 signal_thread_state_change (thread);
3324 CloseHandle (wait->handles [i]);
3330 gint allocated; /* +1 so that refs [allocated] == NULL */
3334 typedef struct ref_stack RefStack;
3337 ref_stack_new (gint initial_size)
3341 initial_size = MAX (initial_size, 16) + 1;
3342 rs = g_new0 (RefStack, 1);
3343 rs->refs = g_new0 (gpointer, initial_size);
3344 rs->allocated = initial_size;
3349 ref_stack_destroy (gpointer ptr)
3360 ref_stack_push (RefStack *rs, gpointer ptr)
3362 g_assert (rs != NULL);
3364 if (rs->bottom >= rs->allocated) {
3365 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3366 rs->allocated <<= 1;
3367 rs->refs [rs->allocated] = NULL;
3369 rs->refs [rs->bottom++] = ptr;
3373 ref_stack_pop (RefStack *rs)
3375 if (rs == NULL || rs->bottom == 0)
3379 rs->refs [rs->bottom] = NULL;
3383 ref_stack_find (RefStack *rs, gpointer ptr)
3390 for (refs = rs->refs; refs && *refs; refs++) {
3398 * mono_thread_push_appdomain_ref:
3400 * Register that the current thread may have references to objects in domain
3401 * @domain on its stack. Each call to this function should be paired with a
3402 * call to pop_appdomain_ref.
3405 mono_thread_push_appdomain_ref (MonoDomain *domain)
3407 MonoInternalThread *thread = mono_thread_internal_current ();
3410 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3411 SPIN_LOCK (thread->lock_thread_id);
3412 if (thread->appdomain_refs == NULL)
3413 thread->appdomain_refs = ref_stack_new (16);
3414 ref_stack_push (thread->appdomain_refs, domain);
3415 SPIN_UNLOCK (thread->lock_thread_id);
3420 mono_thread_pop_appdomain_ref (void)
3422 MonoInternalThread *thread = mono_thread_internal_current ();
3425 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3426 SPIN_LOCK (thread->lock_thread_id);
3427 ref_stack_pop (thread->appdomain_refs);
3428 SPIN_UNLOCK (thread->lock_thread_id);
3433 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3436 SPIN_LOCK (thread->lock_thread_id);
3437 res = ref_stack_find (thread->appdomain_refs, domain);
3438 SPIN_UNLOCK (thread->lock_thread_id);
3443 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3445 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3448 typedef struct abort_appdomain_data {
3449 struct wait_data wait;
3451 } abort_appdomain_data;
3454 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3456 MonoInternalThread *thread = (MonoInternalThread*)value;
3457 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3458 MonoDomain *domain = data->domain;
3460 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3461 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3463 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3464 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3467 data->wait.handles [data->wait.num] = handle;
3468 data->wait.threads [data->wait.num] = thread;
3471 /* Just ignore the rest, we can't do anything with
3479 * mono_threads_abort_appdomain_threads:
3481 * Abort threads which has references to the given appdomain.
3484 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3486 #ifdef __native_client__
3490 abort_appdomain_data user_data;
3492 int orig_timeout = timeout;
3495 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3497 start_time = mono_msec_ticks ();
3499 mono_threads_lock ();
3501 user_data.domain = domain;
3502 user_data.wait.num = 0;
3503 /* This shouldn't take any locks */
3504 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3505 mono_threads_unlock ();
3507 if (user_data.wait.num > 0) {
3508 /* Abort the threads outside the threads lock */
3509 for (i = 0; i < user_data.wait.num; ++i)
3510 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3513 * We should wait for the threads either to abort, or to leave the
3514 * domain. We can't do the latter, so we wait with a timeout.
3516 wait_for_tids (&user_data.wait, 100);
3519 /* Update remaining time */
3520 timeout -= mono_msec_ticks () - start_time;
3521 start_time = mono_msec_ticks ();
3523 if (orig_timeout != -1 && timeout < 0)
3526 while (user_data.wait.num > 0);
3528 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3534 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3536 MonoInternalThread *thread = (MonoInternalThread*)value;
3537 MonoDomain *domain = (MonoDomain*)user_data;
3540 /* No locking needed here */
3541 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3543 if (thread->cached_culture_info) {
3544 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3545 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3546 if (obj && obj->vtable->domain == domain)
3547 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3553 * mono_threads_clear_cached_culture:
3555 * Clear the cached_current_culture from all threads if it is in the
3559 mono_threads_clear_cached_culture (MonoDomain *domain)
3561 mono_threads_lock ();
3562 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3563 mono_threads_unlock ();
3567 * mono_thread_get_undeniable_exception:
3569 * Return an exception which needs to be raised when leaving a catch clause.
3570 * This is used for undeniable exception propagation.
3573 mono_thread_get_undeniable_exception (void)
3575 MonoInternalThread *thread = mono_thread_internal_current ();
3577 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3579 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3580 * exception if the thread no longer references a dying appdomain.
3582 thread->abort_exc->trace_ips = NULL;
3583 thread->abort_exc->stack_trace = NULL;
3584 return thread->abort_exc;
3590 #if MONO_SMALL_CONFIG
3591 #define NUM_STATIC_DATA_IDX 4
3592 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3596 #define NUM_STATIC_DATA_IDX 8
3597 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3598 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3602 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3605 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3608 gpointer *static_data = addr;
3609 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3612 if (!static_data [i])
3614 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3615 ptr = static_data [i];
3616 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3617 uintptr_t bmap = static_reference_bitmaps [i][j];
3620 if ((bmap & 1) && *p) {
3621 mark_func (p, gc_data);
3631 * mono_alloc_static_data
3633 * Allocate memory blocks for storing threads or context static data
3636 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3638 guint idx = (offset >> 24) - 1;
3641 gpointer* static_data = *static_data_ptr;
3643 static void* tls_desc = NULL;
3644 if (mono_gc_user_markers_supported () && !tls_desc)
3645 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3646 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3647 *static_data_ptr = static_data;
3648 static_data [0] = static_data;
3651 for (i = 1; i <= idx; ++i) {
3652 if (static_data [i])
3654 if (mono_gc_user_markers_supported () && threadlocal)
3655 static_data [i] = g_malloc0 (static_data_size [i]);
3657 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3662 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3665 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3666 gpointer p = static_data [i];
3670 * At this point, the static data pointer array is still registered with the
3671 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3672 * data. Freeing the individual arrays without first nulling their slots
3673 * would make it possible for mark_tls_slots() to encounter a pointer to
3674 * such an already freed array. See bug #13813.
3676 static_data [i] = NULL;
3677 mono_memory_write_barrier ();
3678 if (mono_gc_user_markers_supported () && threadlocal)
3681 mono_gc_free_fixed (p);
3683 mono_gc_free_fixed (static_data);
3687 * mono_init_static_data_info
3689 * Initializes static data counters
3691 static void mono_init_static_data_info (StaticDataInfo *static_data)
3693 static_data->idx = 0;
3694 static_data->offset = 0;
3695 static_data->freelist = NULL;
3699 * mono_alloc_static_data_slot
3701 * Generates an offset for static data. static_data contains the counters
3702 * used to generate it.
3705 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3709 if (!static_data->idx && !static_data->offset) {
3711 * we use the first chunk of the first allocation also as
3712 * an array for the rest of the data
3714 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3716 static_data->offset += align - 1;
3717 static_data->offset &= ~(align - 1);
3718 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3719 static_data->idx ++;
3720 g_assert (size <= static_data_size [static_data->idx]);
3721 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3722 static_data->offset = 0;
3724 offset = static_data->offset | ((static_data->idx + 1) << 24);
3725 static_data->offset += size;
3730 * ensure thread static fields already allocated are valid for thread
3731 * This function is called when a thread is created or on thread attach.
3734 thread_adjust_static_data (MonoInternalThread *thread)
3738 mono_threads_lock ();
3739 if (thread_static_info.offset || thread_static_info.idx > 0) {
3740 /* get the current allocated size */
3741 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3742 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3744 mono_threads_unlock ();
3748 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3750 MonoInternalThread *thread = value;
3751 guint32 offset = GPOINTER_TO_UINT (user);
3753 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3756 static MonoThreadDomainTls*
3757 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3759 MonoThreadDomainTls* prev = NULL;
3760 MonoThreadDomainTls* tmp = static_data->freelist;
3762 if (tmp->size == size) {
3764 prev->next = tmp->next;
3766 static_data->freelist = tmp->next;
3775 #if SIZEOF_VOID_P == 4
3782 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3785 int idx = (offset >> 24) - 1;
3787 if (!static_reference_bitmaps [idx])
3788 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3789 rb = static_reference_bitmaps [idx];
3791 offset /= sizeof (gpointer);
3792 /* offset is now the bitmap offset */
3793 for (i = 0; i < numbits; ++i) {
3794 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3795 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (ONE_P << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3800 clear_reference_bitmap (guint32 offset, guint32 size)
3802 int idx = (offset >> 24) - 1;
3804 rb = static_reference_bitmaps [idx];
3806 offset /= sizeof (gpointer);
3807 size /= sizeof (gpointer);
3809 /* offset is now the bitmap offset */
3810 for (; offset < size; ++offset)
3811 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3815 * The offset for a special static variable is composed of three parts:
3816 * a bit that indicates the type of static data (0:thread, 1:context),
3817 * an index in the array of chunks of memory for the thread (thread->static_data)
3818 * and an offset in that chunk of mem. This allows allocating less memory in the
3823 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3826 if (static_type == SPECIAL_STATIC_THREAD) {
3827 MonoThreadDomainTls *item;
3828 mono_threads_lock ();
3829 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3830 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3832 offset = item->offset;
3835 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3837 update_tls_reference_bitmap (offset, bitmap, numbits);
3838 /* This can be called during startup */
3839 if (threads != NULL)
3840 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3841 mono_threads_unlock ();
3843 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3844 mono_contexts_lock ();
3845 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3846 mono_contexts_unlock ();
3847 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3853 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3855 /* The high bit means either thread (0) or static (1) data. */
3857 guint32 static_type = (offset & 0x80000000);
3860 offset &= 0x7fffffff;
3861 idx = (offset >> 24) - 1;
3863 if (static_type == 0) {
3864 return get_thread_static_data (thread, offset);
3866 /* Allocate static data block under demand, since we don't have a list
3869 MonoAppContext *context = mono_context_get ();
3870 if (!context->static_data || !context->static_data [idx]) {
3871 mono_contexts_lock ();
3872 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3873 mono_contexts_unlock ();
3875 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3880 mono_get_special_static_data (guint32 offset)
3882 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3891 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3893 MonoInternalThread *thread = value;
3894 TlsOffsetSize *data = user;
3895 int idx = (data->offset >> 24) - 1;
3898 if (!thread->static_data || !thread->static_data [idx])
3900 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3901 mono_gc_bzero_atomic (ptr, data->size);
3905 do_free_special_slot (guint32 offset, guint32 size)
3907 guint32 static_type = (offset & 0x80000000);
3908 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3909 if (static_type == 0) {
3911 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3912 data.offset = offset & 0x7fffffff;
3914 clear_reference_bitmap (data.offset, data.size);
3915 if (threads != NULL)
3916 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3917 item->offset = offset;
3920 if (!mono_runtime_is_shutting_down ()) {
3921 item->next = thread_static_info.freelist;
3922 thread_static_info.freelist = item;
3924 /* We could be called during shutdown after mono_thread_cleanup () is called */
3928 /* FIXME: free context static data as well */
3933 do_free_special (gpointer key, gpointer value, gpointer data)
3935 MonoClassField *field = key;
3936 guint32 offset = GPOINTER_TO_UINT (value);
3939 size = mono_type_size (field->type, &align);
3940 do_free_special_slot (offset, size);
3944 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3946 mono_threads_lock ();
3947 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3948 mono_threads_unlock ();
3952 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3954 mono_threads_lock ();
3955 do_free_special_slot (offset, size);
3956 mono_threads_unlock ();
3960 * allocates room in the thread local area for storing an instance of the struct type
3961 * the allocation is kept track of in domain->tlsrec_list.
3964 mono_thread_alloc_tls (MonoReflectionType *type)
3966 MonoDomain *domain = mono_domain_get ();
3968 MonoTlsDataRecord *tlsrec;
3971 gsize default_bitmap [4] = {0};
3972 uint32_t tls_offset;
3976 klass = mono_class_from_mono_type (type->type);
3977 /* TlsDatum is a struct, so we subtract the object header size offset */
3978 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3979 size = mono_type_size (type->type, &align);
3980 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3981 if (bitmap != default_bitmap)
3983 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3984 tlsrec->tls_offset = tls_offset;
3985 tlsrec->size = size;
3986 mono_domain_lock (domain);
3987 tlsrec->next = domain->tlsrec_list;
3988 domain->tlsrec_list = tlsrec;
3989 mono_domain_unlock (domain);
3994 mono_thread_destroy_tls (uint32_t tls_offset)
3996 MonoTlsDataRecord *prev = NULL;
3997 MonoTlsDataRecord *cur;
3999 MonoDomain *domain = mono_domain_get ();
4000 mono_domain_lock (domain);
4001 cur = domain->tlsrec_list;
4003 if (cur->tls_offset == tls_offset) {
4005 prev->next = cur->next;
4007 domain->tlsrec_list = cur->next;
4015 mono_domain_unlock (domain);
4017 mono_special_static_data_free_slot (tls_offset, size);
4021 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4024 mono_thread_destroy_domain_tls (MonoDomain *domain)
4026 while (domain->tlsrec_list)
4027 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
4030 static MonoClassField *local_slots = NULL;
4033 /* local tls data to get locals_slot from a thread */
4036 /* index in the locals_slot array */
4041 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4043 LocalSlotID *sid = user_data;
4044 MonoInternalThread *thread = (MonoInternalThread*)value;
4045 MonoArray *slots_array;
4047 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4048 * it is for the right domain, so we need to check if it is allocated an initialized
4049 * for the current thread.
4051 /*g_print ("handling thread %p\n", thread);*/
4052 if (!thread->static_data || !thread->static_data [sid->idx])
4054 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4055 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4057 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4061 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4069 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4071 g_warning ("local_slots field not found in Thread class");
4075 domain = mono_domain_get ();
4076 mono_domain_lock (domain);
4077 if (domain->special_static_fields)
4078 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4079 mono_domain_unlock (domain);
4082 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4083 sid.offset = GPOINTER_TO_UINT (addr);
4084 sid.offset &= 0x7fffffff;
4085 sid.idx = (sid.offset >> 24) - 1;
4086 mono_threads_lock ();
4087 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4088 mono_threads_unlock ();
4090 /* FIXME: clear the slot for MonoAppContexts, too */
4095 static void CALLBACK dummy_apc (ULONG_PTR param)
4101 * mono_thread_execute_interruption
4103 * Performs the operation that the requested thread state requires (abort,
4106 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4108 LOCK_THREAD (thread);
4110 /* MonoThread::interruption_requested can only be changed with atomics */
4111 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4112 /* this will consume pending APC calls */
4114 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4116 InterlockedDecrement (&thread_interruption_requested);
4117 /* Clear the interrupted flag of the thread so it can wait again */
4118 mono_thread_info_clear_interruption ();
4121 if ((thread->state & ThreadState_AbortRequested) != 0) {
4122 UNLOCK_THREAD (thread);
4123 if (thread->abort_exc == NULL) {
4125 * This might be racy, but it has to be called outside the lock
4126 * since it calls managed code.
4128 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4130 return thread->abort_exc;
4132 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4133 self_suspend_internal (thread);
4136 else if ((thread->state & ThreadState_StopRequested) != 0) {
4137 /* FIXME: do this through the JIT? */
4139 UNLOCK_THREAD (thread);
4141 mono_thread_exit ();
4143 } else if (thread->pending_exception) {
4146 exc = thread->pending_exception;
4147 thread->pending_exception = NULL;
4149 UNLOCK_THREAD (thread);
4151 } else if (thread->thread_interrupt_requested) {
4153 thread->thread_interrupt_requested = FALSE;
4154 UNLOCK_THREAD (thread);
4156 return(mono_get_exception_thread_interrupted ());
4159 UNLOCK_THREAD (thread);
4165 * mono_thread_request_interruption
4167 * A signal handler can call this method to request the interruption of a
4168 * thread. The result of the interruption will depend on the current state of
4169 * the thread. If the result is an exception that needs to be throw, it is
4170 * provided as return value.
4173 mono_thread_request_interruption (gboolean running_managed)
4175 MonoInternalThread *thread = mono_thread_internal_current ();
4177 /* The thread may already be stopping */
4182 if (thread->interrupt_on_stop &&
4183 thread->state & ThreadState_StopRequested &&
4184 thread->state & ThreadState_Background)
4188 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4190 InterlockedIncrement (&thread_interruption_requested);
4192 if (!running_managed || is_running_protected_wrapper ()) {
4193 /* Can't stop while in unmanaged code. Increase the global interruption
4194 request count. When exiting the unmanaged method the count will be
4195 checked and the thread will be interrupted. */
4197 if (mono_thread_notify_pending_exc_fn && !running_managed)
4198 /* The JIT will notify the thread about the interruption */
4199 /* This shouldn't take any locks */
4200 mono_thread_notify_pending_exc_fn ();
4202 /* this will awake the thread if it is in WaitForSingleObject
4204 /* Our implementation of this function ignores the func argument */
4206 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4208 mono_thread_info_self_interrupt ();
4213 return mono_thread_execute_interruption (thread);
4217 /*This function should be called by a thread after it has exited all of
4218 * its handle blocks at interruption time.*/
4220 mono_thread_resume_interruption (void)
4222 MonoInternalThread *thread = mono_thread_internal_current ();
4223 gboolean still_aborting;
4225 /* The thread may already be stopping */
4229 LOCK_THREAD (thread);
4230 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4231 UNLOCK_THREAD (thread);
4233 /*This can happen if the protected block called Thread::ResetAbort*/
4234 if (!still_aborting)
4237 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4239 InterlockedIncrement (&thread_interruption_requested);
4241 mono_thread_info_self_interrupt ();
4243 return mono_thread_execute_interruption (thread);
4246 gboolean mono_thread_interruption_requested ()
4248 if (thread_interruption_requested) {
4249 MonoInternalThread *thread = mono_thread_internal_current ();
4250 /* The thread may already be stopping */
4252 return (thread->interruption_requested);
4257 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4259 MonoInternalThread *thread = mono_thread_internal_current ();
4261 /* The thread may already be stopping */
4265 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4266 MonoException* exc = mono_thread_execute_interruption (thread);
4267 if (exc) mono_raise_exception (exc);
4272 * Performs the interruption of the current thread, if one has been requested,
4273 * and the thread is not running a protected wrapper.
4275 void mono_thread_interruption_checkpoint ()
4277 mono_thread_interruption_checkpoint_request (FALSE);
4281 * Performs the interruption of the current thread, if one has been requested.
4283 void mono_thread_force_interruption_checkpoint ()
4285 mono_thread_interruption_checkpoint_request (TRUE);
4289 * mono_thread_get_and_clear_pending_exception:
4291 * Return any pending exceptions for the current thread and clear it as a side effect.
4294 mono_thread_get_and_clear_pending_exception (void)
4296 MonoInternalThread *thread = mono_thread_internal_current ();
4298 /* The thread may already be stopping */
4302 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4303 return mono_thread_execute_interruption (thread);
4306 if (thread->pending_exception) {
4307 MonoException *exc = thread->pending_exception;
4309 thread->pending_exception = NULL;
4317 * mono_set_pending_exception:
4319 * Set the pending exception of the current thread to EXC.
4320 * The exception will be thrown when execution returns to managed code.
4323 mono_set_pending_exception (MonoException *exc)
4325 MonoInternalThread *thread = mono_thread_internal_current ();
4327 /* The thread may already be stopping */
4331 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4333 mono_thread_request_interruption (FALSE);
4337 * mono_thread_interruption_request_flag:
4339 * Returns the address of a flag that will be non-zero if an interruption has
4340 * been requested for a thread. The thread to interrupt may not be the current
4341 * thread, so an additional call to mono_thread_interruption_requested() or
4342 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4345 gint32* mono_thread_interruption_request_flag ()
4347 return &thread_interruption_requested;
4351 mono_thread_init_apartment_state (void)
4354 MonoInternalThread* thread = mono_thread_internal_current ();
4356 /* Positive return value indicates success, either
4357 * S_OK if this is first CoInitialize call, or
4358 * S_FALSE if CoInitialize already called, but with same
4359 * threading model. A negative value indicates failure,
4360 * probably due to trying to change the threading model.
4362 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4363 ? COINIT_APARTMENTTHREADED
4364 : COINIT_MULTITHREADED) < 0) {
4365 thread->apartment_state = ThreadApartmentState_Unknown;
4371 mono_thread_cleanup_apartment_state (void)
4374 MonoInternalThread* thread = mono_thread_internal_current ();
4376 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4383 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4385 LOCK_THREAD (thread);
4386 thread->state |= state;
4387 UNLOCK_THREAD (thread);
4391 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4393 LOCK_THREAD (thread);
4394 thread->state &= ~state;
4395 UNLOCK_THREAD (thread);
4399 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4401 gboolean ret = FALSE;
4403 LOCK_THREAD (thread);
4405 if ((thread->state & test) != 0) {
4409 UNLOCK_THREAD (thread);
4414 //static MonoClassField *execution_context_field;
4417 get_execution_context_addr (void)
4419 MonoDomain *domain = mono_domain_get ();
4420 guint32 offset = domain->execution_context_field_offset;
4423 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4426 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4428 mono_domain_lock (domain);
4429 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4430 mono_domain_unlock (domain);
4433 domain->execution_context_field_offset = offset;
4436 return (MonoObject**) mono_get_special_static_data (offset);
4440 mono_thread_get_execution_context (void)
4442 return *get_execution_context_addr ();
4446 mono_thread_set_execution_context (MonoObject *ec)
4448 *get_execution_context_addr () = ec;
4451 static gboolean has_tls_get = FALSE;
4454 mono_runtime_set_has_tls_get (gboolean val)
4460 mono_runtime_has_tls_get (void)
4466 mono_thread_kill (MonoInternalThread *thread, int signal)
4468 #ifdef __native_client__
4469 /* Workaround pthread_kill abort() in NaCl glibc. */
4473 /* Win32 uses QueueUserAPC and callers of this are guarded */
4474 g_assert_not_reached ();
4476 # ifdef PTHREAD_POINTER_ID
4477 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4479 # ifdef PLATFORM_ANDROID
4480 if (thread->android_tid != 0) {
4482 int old_errno = errno;
4484 ret = tkill ((pid_t) thread->android_tid, signal);
4493 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4495 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4502 self_interrupt_thread (void *_unused)
4504 MonoThreadInfo *info = mono_thread_info_current ();
4505 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4506 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4507 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4508 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4512 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4516 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4520 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4522 MonoJitInfo **dest = data;
4528 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4530 MonoJitInfo *ji = NULL;
4533 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4538 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4541 MonoThreadInfo *info = NULL;
4542 gboolean protected_wrapper;
4543 gboolean running_managed;
4545 if (!mono_thread_info_new_interrupt_enabled ()) {
4546 signal_thread_state_change (thread);
4551 FIXME this is insanely broken, it doesn't cause interruption to happen
4552 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4554 if (thread == mono_thread_internal_current ()) {
4555 /* Do it synchronously */
4556 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4558 mono_raise_exception (exc);
4559 mono_thread_info_interrupt (thread->handle);
4563 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4564 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4568 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4569 mono_thread_info_finish_suspend_and_resume (info);
4573 /*someone is already interrupting it*/
4574 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4575 mono_thread_info_finish_suspend_and_resume (info);
4578 InterlockedIncrement (&thread_interruption_requested);
4580 ji = mono_thread_info_get_last_managed (info);
4581 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4582 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4584 if (!protected_wrapper && running_managed) {
4585 /*We are in managed code*/
4586 /*Set the thread to call */
4587 if (install_async_abort)
4588 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4589 mono_thread_info_finish_suspend_and_resume (info);
4592 * This will cause waits to be broken.
4593 * It will also prevent the thread from entering a wait, so if the thread returns
4594 * from the wait before it receives the abort signal, it will just spin in the wait
4595 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4598 gpointer interrupt_handle;
4600 interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4601 mono_thread_info_finish_suspend_and_resume (info);
4602 mono_thread_info_finish_interrupt (interrupt_handle);
4604 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4608 transition_to_suspended (MonoInternalThread *thread, MonoThreadInfo *info)
4610 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4611 g_assert (0); /*FIXME we should not reach this */
4612 /*Make sure we balance the suspend count.*/
4614 mono_thread_info_finish_suspend_and_resume (info);
4616 thread->state &= ~ThreadState_SuspendRequested;
4617 thread->state |= ThreadState_Suspended;
4619 mono_thread_info_finish_suspend (info);
4621 UNLOCK_THREAD (thread);
4625 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4627 if (!mono_thread_info_new_interrupt_enabled ()) {
4628 signal_thread_state_change (thread);
4632 LOCK_THREAD (thread);
4633 if (thread == mono_thread_internal_current ()) {
4634 transition_to_suspended (thread, NULL);
4635 mono_thread_info_self_suspend ();
4637 MonoThreadInfo *info;
4639 gboolean protected_wrapper;
4640 gboolean running_managed;
4642 /*A null info usually means the thread is already dead. */
4643 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4644 UNLOCK_THREAD (thread);
4648 ji = mono_thread_info_get_last_managed (info);
4649 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4650 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4652 if (running_managed && !protected_wrapper) {
4653 transition_to_suspended (thread, info);
4655 gpointer interrupt_handle;
4657 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4658 InterlockedIncrement (&thread_interruption_requested);
4660 interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4661 mono_thread_info_finish_suspend_and_resume (info);
4663 mono_thread_info_finish_interrupt (interrupt_handle);
4664 UNLOCK_THREAD (thread);
4669 /*This is called with @thread synch_cs held and it must release it*/
4671 self_suspend_internal (MonoInternalThread *thread)
4673 if (!mono_thread_info_new_interrupt_enabled ()) {
4674 thread->state &= ~ThreadState_SuspendRequested;
4675 thread->state |= ThreadState_Suspended;
4676 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4677 if (thread->suspend_event == NULL) {
4678 UNLOCK_THREAD (thread);
4681 if (thread->suspended_event)
4682 SetEvent (thread->suspended_event);
4684 UNLOCK_THREAD (thread);
4686 if (shutting_down) {
4687 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4692 WaitForSingleObject (thread->suspend_event, INFINITE);
4694 LOCK_THREAD (thread);
4696 CloseHandle (thread->suspend_event);
4697 thread->suspend_event = NULL;
4698 thread->state &= ~ThreadState_Suspended;
4700 /* The thread that requested the resume will have replaced this event
4701 * and will be waiting for it
4703 SetEvent (thread->resume_event);
4705 UNLOCK_THREAD (thread);
4709 transition_to_suspended (thread, NULL);
4710 mono_thread_info_self_suspend ();
4713 /*This is called with @thread synch_cs held and it must release it*/
4715 resume_thread_internal (MonoInternalThread *thread)
4717 if (!mono_thread_info_new_interrupt_enabled ()) {
4718 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4719 if (thread->resume_event == NULL) {
4720 UNLOCK_THREAD (thread);
4724 /* Awake the thread */
4725 SetEvent (thread->suspend_event);
4727 UNLOCK_THREAD (thread);
4729 /* Wait for the thread to awake */
4730 WaitForSingleObject (thread->resume_event, INFINITE);
4731 CloseHandle (thread->resume_event);
4732 thread->resume_event = NULL;
4736 UNLOCK_THREAD (thread);
4737 /* Awake the thread */
4738 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4740 LOCK_THREAD (thread);
4741 thread->state &= ~ThreadState_Suspended;
4742 UNLOCK_THREAD (thread);
4748 * mono_thread_is_foreign:
4749 * @thread: the thread to query
4751 * This function allows one to determine if a thread was created by the mono runtime and has
4752 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4754 * Returns: true if @thread was not created by the runtime.
4757 mono_thread_is_foreign (MonoThread *thread)
4759 MonoThreadInfo *info = thread->internal_thread->thread_info;
4760 return info->runtime_thread == FALSE;
4764 * mono_add_joinable_thread:
4766 * Add TID to the list of joinable threads.
4767 * LOCKING: Acquires the threads lock.
4770 mono_threads_add_joinable_thread (gpointer tid)
4774 * We cannot detach from threads because it causes problems like
4775 * 2fd16f60/r114307. So we collect them and join them when
4776 * we have time (in he finalizer thread).
4778 joinable_threads_lock ();
4779 if (!joinable_threads)
4780 joinable_threads = g_hash_table_new (NULL, NULL);
4781 g_hash_table_insert (joinable_threads, tid, tid);
4782 joinable_thread_count ++;
4783 joinable_threads_unlock ();
4785 mono_gc_finalize_notify ();
4790 * mono_threads_join_threads:
4792 * Join all joinable threads. This is called from the finalizer thread.
4793 * LOCKING: Acquires the threads lock.
4796 mono_threads_join_threads (void)
4799 GHashTableIter iter;
4806 if (!joinable_thread_count)
4810 joinable_threads_lock ();
4812 if (g_hash_table_size (joinable_threads)) {
4813 g_hash_table_iter_init (&iter, joinable_threads);
4814 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4815 thread = (pthread_t)tid;
4816 g_hash_table_remove (joinable_threads, key);
4817 joinable_thread_count --;
4820 joinable_threads_unlock ();
4822 if (thread != pthread_self ())
4823 /* This shouldn't block */
4824 pthread_join (thread, NULL);
4835 * Wait for thread TID to exit.
4836 * LOCKING: Acquires the threads lock.
4839 mono_thread_join (gpointer tid)
4843 gboolean found = FALSE;
4845 joinable_threads_lock ();
4846 if (!joinable_threads)
4847 joinable_threads = g_hash_table_new (NULL, NULL);
4848 if (g_hash_table_lookup (joinable_threads, tid)) {
4849 g_hash_table_remove (joinable_threads, tid);
4850 joinable_thread_count --;
4853 joinable_threads_unlock ();
4856 thread = (pthread_t)tid;
4857 pthread_join (thread, NULL);