2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
19 #include <mono/metadata/object.h>
20 #include <mono/metadata/domain-internals.h>
21 #include <mono/metadata/profiler-private.h>
22 #include <mono/metadata/threads.h>
23 #include <mono/metadata/threadpool.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internal.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/hazard-pointer.h>
40 #include <mono/utils/mono-tls.h>
41 #include <mono/utils/atomic.h>
42 #include <mono/utils/mono-memory-model.h>
44 #include <mono/metadata/gc-internal.h>
50 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
51 #define USE_TKILL_ON_ANDROID 1
54 #ifdef PLATFORM_ANDROID
57 #ifdef USE_TKILL_ON_ANDROID
58 extern int tkill (pid_t tid, int signal);
62 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
63 #define THREAD_DEBUG(a)
64 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_WAIT_DEBUG(a)
66 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
67 #define LIBGC_DEBUG(a)
69 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
70 #define SPIN_LOCK(i) do { \
71 if (SPIN_TRYLOCK (i)) \
75 #define SPIN_UNLOCK(i) i = 0
77 #define LOCK_THREAD(thread) lock_thread((thread))
78 #define UNLOCK_THREAD(thread) unlock_thread((thread))
80 /* Provide this for systems with glib < 2.6 */
81 #ifndef G_GSIZE_FORMAT
82 # if GLIB_SIZEOF_LONG == 8
83 # define G_GSIZE_FORMAT "lu"
85 # define G_GSIZE_FORMAT "u"
91 guint32 (*func)(void *);
107 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
108 struct _MonoThreadDomainTls {
109 MonoThreadDomainTls *next;
117 MonoThreadDomainTls *freelist;
120 /* Number of cached culture objects in the MonoThread->cached_culture_info array
121 * (per-type): we use the first NUM entries for CultureInfo and the last for
122 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
124 #define NUM_CACHED_CULTURES 4
125 #define CULTURES_START_IDX 0
126 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
128 /* Controls access to the 'threads' hash table */
129 static void mono_threads_lock (void);
130 static void mono_threads_unlock (void);
131 static mono_mutex_t threads_mutex;
133 /* Controls access to context static data */
134 #define mono_contexts_lock() mono_mutex_lock (&contexts_mutex)
135 #define mono_contexts_unlock() mono_mutex_unlock (&contexts_mutex)
136 static mono_mutex_t contexts_mutex;
138 /* Controls access to the 'joinable_threads' hash table */
139 #define joinable_threads_lock() mono_mutex_lock (&joinable_threads_mutex)
140 #define joinable_threads_unlock() mono_mutex_unlock (&joinable_threads_mutex)
141 static mono_mutex_t joinable_threads_mutex;
143 /* Holds current status of static data heap */
144 static StaticDataInfo thread_static_info;
145 static StaticDataInfo context_static_info;
147 /* The hash of existing threads (key is thread ID, value is
148 * MonoInternalThread*) that need joining before exit
150 static MonoGHashTable *threads=NULL;
153 * Threads which are starting up and they are not in the 'threads' hash yet.
154 * When handle_store is called for a thread, it will be removed from this hash table.
155 * Protected by mono_threads_lock ().
157 static MonoGHashTable *threads_starting_up = NULL;
159 /* Maps a MonoThread to its start argument */
160 /* Protected by mono_threads_lock () */
161 static MonoGHashTable *thread_start_args = NULL;
163 /* The TLS key that holds the MonoObject assigned to each thread */
164 static MonoNativeTlsKey current_object_key;
167 /* Protected by the threads lock */
168 static GHashTable *joinable_threads;
169 static int joinable_thread_count;
171 #ifdef MONO_HAVE_FAST_TLS
172 /* we need to use both the Tls* functions and __thread because
173 * the gc needs to see all the threads
175 MONO_FAST_TLS_DECLARE(tls_current_object);
176 #define SET_CURRENT_OBJECT(x) do { \
177 MONO_FAST_TLS_SET (tls_current_object, x); \
178 mono_native_tls_set_value (current_object_key, x); \
180 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
182 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
183 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
186 /* function called at thread start */
187 static MonoThreadStartCB mono_thread_start_cb = NULL;
189 /* function called at thread attach */
190 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
192 /* function called at thread cleanup */
193 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
195 /* function called to notify the runtime about a pending exception on the current thread */
196 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
198 /* The default stack size for each thread */
199 static guint32 default_stacksize = 0;
200 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
202 static void thread_adjust_static_data (MonoInternalThread *thread);
203 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
204 static void mono_init_static_data_info (StaticDataInfo *static_data);
205 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
206 static gboolean mono_thread_resume (MonoInternalThread* thread);
207 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
208 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
209 static void self_suspend_internal (MonoInternalThread *thread);
210 static gboolean resume_thread_internal (MonoInternalThread *thread);
212 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
213 static void ref_stack_destroy (gpointer rs);
215 /* Spin lock for InterlockedXXX 64 bit functions */
216 #define mono_interlocked_lock() mono_mutex_lock (&interlocked_mutex)
217 #define mono_interlocked_unlock() mono_mutex_unlock (&interlocked_mutex)
218 static mono_mutex_t interlocked_mutex;
220 /* global count of thread interruptions requested */
221 static gint32 thread_interruption_requested = 0;
223 /* Event signaled when a thread changes its background mode */
224 static HANDLE background_change_event;
226 static gboolean shutting_down = FALSE;
228 static gint32 managed_thread_id_counter = 0;
232 mono_threads_lock (void)
235 mono_locks_acquire (&threads_mutex, ThreadsLock);
236 MONO_FINISH_TRY_BLOCKING
240 mono_threads_unlock (void)
242 mono_locks_release (&threads_mutex, ThreadsLock);
247 get_next_managed_thread_id (void)
249 return InterlockedIncrement (&managed_thread_id_counter);
253 mono_thread_get_tls_key (void)
255 return current_object_key;
259 mono_thread_get_tls_offset (void)
262 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
266 static inline MonoNativeThreadId
267 thread_get_tid (MonoInternalThread *thread)
269 /* We store the tid as a guint64 to keep the object layout constant between platforms */
270 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
273 /* handle_store() and handle_remove() manage the array of threads that
274 * still need to be waited for when the main thread exits.
276 * If handle_store() returns FALSE the thread must not be started
277 * because Mono is shutting down.
279 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
281 mono_threads_lock ();
283 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
285 if (threads_starting_up)
286 mono_g_hash_table_remove (threads_starting_up, thread);
288 if (shutting_down && !force_attach) {
289 mono_threads_unlock ();
294 MONO_GC_REGISTER_ROOT_FIXED (threads);
295 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
298 /* We don't need to duplicate thread->handle, because it is
299 * only closed when the thread object is finalized by the GC.
301 g_assert (thread->internal_thread);
302 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
303 thread->internal_thread);
305 mono_threads_unlock ();
310 static gboolean handle_remove(MonoInternalThread *thread)
313 gsize tid = thread->tid;
315 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
317 mono_threads_lock ();
320 /* We have to check whether the thread object for the
321 * tid is still the same in the table because the
322 * thread might have been destroyed and the tid reused
323 * in the meantime, in which case the tid would be in
324 * the table, but with another thread object.
326 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
327 mono_g_hash_table_remove (threads, (gpointer)tid);
336 mono_threads_unlock ();
338 /* Don't close the handle here, wait for the object finalizer
339 * to do it. Otherwise, the following race condition applies:
341 * 1) Thread exits (and handle_remove() closes the handle)
343 * 2) Some other handle is reassigned the same slot
345 * 3) Another thread tries to join the first thread, and
346 * blocks waiting for the reassigned handle to be signalled
347 * (which might never happen). This is possible, because the
348 * thread calling Join() still has a reference to the first
354 static void ensure_synch_cs_set (MonoInternalThread *thread)
356 mono_mutex_t *synch_cs;
358 if (thread->synch_cs != NULL) {
362 synch_cs = g_new0 (mono_mutex_t, 1);
363 mono_mutex_init_recursive (synch_cs);
365 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
366 synch_cs, NULL) != NULL) {
367 /* Another thread must have installed this CS */
368 mono_mutex_destroy (synch_cs);
374 lock_thread (MonoInternalThread *thread)
376 if (!thread->synch_cs)
377 ensure_synch_cs_set (thread);
379 g_assert (thread->synch_cs);
382 mono_mutex_lock (thread->synch_cs);
383 MONO_FINISH_TRY_BLOCKING
387 unlock_thread (MonoInternalThread *thread)
389 mono_mutex_unlock (thread->synch_cs);
393 * NOTE: this function can be called also for threads different from the current one:
394 * make sure no code called from it will ever assume it is run on the thread that is
395 * getting cleaned up.
397 static void thread_cleanup (MonoInternalThread *thread)
399 g_assert (thread != NULL);
401 if (thread->abort_state_handle) {
402 mono_gchandle_free (thread->abort_state_handle);
403 thread->abort_state_handle = 0;
405 thread->abort_exc = NULL;
406 thread->current_appcontext = NULL;
409 * This is necessary because otherwise we might have
410 * cross-domain references which will not get cleaned up when
411 * the target domain is unloaded.
413 if (thread->cached_culture_info) {
415 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
416 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
420 * thread->synch_cs can be NULL if this was called after
421 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
422 * This can happen only during shutdown.
423 * The shutting_down flag is not always set, so we can't assert on it.
425 if (thread->synch_cs)
426 LOCK_THREAD (thread);
428 thread->state |= ThreadState_Stopped;
429 thread->state &= ~ThreadState_Background;
431 if (thread->synch_cs)
432 UNLOCK_THREAD (thread);
435 An interruption request has leaked to cleanup. Adjust the global counter.
437 This can happen is the abort source thread finds the abortee (this) thread
438 in unmanaged code. If this thread never trips back to managed code or check
439 the local flag it will be left set and positively unbalance the global counter.
441 Leaving the counter unbalanced will cause a performance degradation since all threads
442 will now keep checking their local flags all the time.
444 if (InterlockedExchange (&thread->interruption_requested, 0))
445 InterlockedDecrement (&thread_interruption_requested);
447 /* if the thread is not in the hash it has been removed already */
448 if (!handle_remove (thread)) {
449 if (thread == mono_thread_internal_current ()) {
450 mono_domain_unset ();
451 mono_memory_barrier ();
453 /* This needs to be called even if handle_remove () fails */
454 if (mono_thread_cleanup_fn)
455 mono_thread_cleanup_fn ((MonoNativeThreadId)thread->tid);
458 mono_release_type_locks (thread);
460 mono_profiler_thread_end (thread->tid);
462 if (thread == mono_thread_internal_current ()) {
464 * This will signal async signal handlers that the thread has exited.
465 * The profiler callback needs this to be set, so it cannot be done earlier.
467 mono_domain_unset ();
468 mono_memory_barrier ();
471 if (thread == mono_thread_internal_current ())
472 mono_thread_pop_appdomain_ref ();
474 thread->cached_culture_info = NULL;
476 mono_free_static_data (thread->static_data, TRUE);
477 thread->static_data = NULL;
478 ref_stack_destroy (thread->appdomain_refs);
479 thread->appdomain_refs = NULL;
481 if (mono_thread_cleanup_fn)
482 mono_thread_cleanup_fn ((MonoNativeThreadId)thread->tid);
484 if (mono_gc_is_moving ()) {
485 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
486 thread->thread_pinning_ref = NULL;
491 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
494 g_assert ((offset & 0x80000000) == 0);
495 offset &= 0x7fffffff;
496 idx = (offset >> 24) - 1;
497 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
501 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
503 static MonoClassField *current_thread_field = NULL;
507 if (!current_thread_field) {
508 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
509 g_assert (current_thread_field);
512 mono_class_vtable (domain, mono_defaults.thread_class);
513 mono_domain_lock (domain);
514 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
515 mono_domain_unlock (domain);
518 return get_thread_static_data (thread, offset);
522 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
524 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
526 g_assert (current->obj.vtable->domain == domain);
528 g_assert (!*current_thread_ptr);
529 *current_thread_ptr = current;
533 create_thread_object (MonoDomain *domain)
535 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
536 return (MonoThread*)mono_gc_alloc_mature (vt);
540 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
542 MonoThread *thread = create_thread_object (domain);
543 MONO_OBJECT_SETREF (thread, internal_thread, internal);
547 static MonoInternalThread*
548 create_internal_thread (void)
550 MonoInternalThread *thread;
553 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
554 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
556 thread->synch_cs = g_new0 (mono_mutex_t, 1);
557 mono_mutex_init_recursive (thread->synch_cs);
559 thread->apartment_state = ThreadApartmentState_Unknown;
560 thread->managed_id = get_next_managed_thread_id ();
561 if (mono_gc_is_moving ()) {
562 thread->thread_pinning_ref = thread;
563 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
570 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
572 MonoDomain *domain = mono_get_root_domain ();
574 if (!candidate || candidate->obj.vtable->domain != domain)
575 candidate = new_thread_with_internal (domain, thread);
576 set_current_thread_for_domain (domain, thread, candidate);
577 g_assert (!thread->root_domain_thread);
578 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
581 static guint32 WINAPI start_wrapper_internal(void *data)
583 MonoThreadInfo *info;
584 StartInfo *start_info = (StartInfo *)data;
585 guint32 (*start_func)(void *);
589 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
592 MonoInternalThread *internal = start_info->obj->internal_thread;
593 MonoObject *start_delegate = start_info->delegate;
594 MonoDomain *domain = start_info->obj->obj.vtable->domain;
596 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
598 /* We can be sure start_info->obj->tid and
599 * start_info->obj->handle have been set, because the thread
600 * was created suspended, and these values were set before the
604 info = mono_thread_info_current ();
606 internal->thread_info = info;
607 internal->small_id = info->small_id;
611 SET_CURRENT_OBJECT (internal);
613 /* Every thread references the appdomain which created it */
614 mono_thread_push_appdomain_ref (domain);
616 if (!mono_domain_set (domain, FALSE)) {
617 /* No point in raising an appdomain_unloaded exception here */
618 /* FIXME: Cleanup here */
619 mono_thread_pop_appdomain_ref ();
623 start_func = start_info->func;
624 start_arg = start_info->start_arg;
626 /* We have to do this here because mono_thread_new_init()
627 requires that root_domain_thread is set up. */
628 thread_adjust_static_data (internal);
629 init_root_domain_thread (internal, start_info->obj);
631 /* This MUST be called before any managed code can be
632 * executed, as it calls the callback function that (for the
633 * jit) sets the lmf marker.
635 mono_thread_new_init (tid, &tid, start_func);
636 internal->stack_ptr = &tid;
638 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
640 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
642 /* On 2.0 profile (and higher), set explicitly since state might have been
644 if (internal->apartment_state == ThreadApartmentState_Unknown)
645 internal->apartment_state = ThreadApartmentState_MTA;
647 mono_thread_init_apartment_state ();
649 if(internal->start_notify!=NULL) {
650 /* Let the thread that called Start() know we're
653 ReleaseSemaphore (internal->start_notify, 1, NULL);
656 mono_threads_lock ();
657 mono_g_hash_table_remove (thread_start_args, start_info->obj);
658 mono_threads_unlock ();
660 mono_thread_set_execution_context (start_info->obj->ec_to_set);
661 start_info->obj->ec_to_set = NULL;
664 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
668 * Call this after calling start_notify, since the profiler callback might want
669 * to lock the thread, and the lock is held by thread_start () which waits for
672 mono_profiler_thread_start (tid);
674 /* if the name was set before starting, we didn't invoke the profiler callback */
675 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
676 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
677 mono_profiler_thread_name (internal->tid, tname);
680 /* start_func is set only for unmanaged start functions */
682 start_func (start_arg);
685 g_assert (start_delegate != NULL);
686 args [0] = start_arg;
687 /* we may want to handle the exception here. See comment below on unhandled exceptions */
688 mono_runtime_delegate_invoke (start_delegate, args, NULL);
691 /* If the thread calls ExitThread at all, this remaining code
692 * will not be executed, but the main thread will eventually
693 * call thread_cleanup() on this thread's behalf.
696 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
698 /* Do any cleanup needed for apartment state. This
699 * cannot be done in thread_cleanup since thread_cleanup could be
700 * called for a thread other than the current thread.
701 * mono_thread_cleanup_apartment_state cleans up apartment
702 * for the current thead */
703 mono_thread_cleanup_apartment_state ();
705 thread_cleanup (internal);
709 /* Remove the reference to the thread object in the TLS data,
710 * so the thread object can be finalized. This won't be
711 * reached if the thread threw an uncaught exception, so those
712 * thread handles will stay referenced :-( (This is due to
713 * missing support for scanning thread-specific data in the
714 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
717 SET_CURRENT_OBJECT (NULL);
722 static guint32 WINAPI start_wrapper(void *data)
726 /* Avoid scanning the frames above this frame during a GC */
727 mono_gc_set_stack_end ((void*)&dummy);
729 return start_wrapper_internal (data);
735 * Common thread creation code.
736 * LOCKING: Acquires the threads lock.
739 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
740 gboolean throw_on_failure)
742 HANDLE thread_handle;
743 MonoNativeThreadId tid;
744 guint32 create_flags;
747 * Join joinable threads to prevent running out of threads since the finalizer
748 * thread might be blocked/backlogged.
750 mono_threads_join_threads ();
752 mono_threads_lock ();
755 mono_threads_unlock ();
759 * The thread start argument may be an object reference, and there is
760 * no ref to keep it alive when the new thread is started but not yet
761 * registered with the collector. So we store it in a GC tracked hash
764 if (thread_start_args == NULL) {
765 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
766 thread_start_args = mono_g_hash_table_new (NULL, NULL);
768 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
769 if (threads_starting_up == NULL) {
770 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
771 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
773 mono_g_hash_table_insert (threads_starting_up, thread, thread);
774 mono_threads_unlock ();
776 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
777 if (!internal->start_notify) {
778 mono_threads_lock ();
779 mono_g_hash_table_remove (threads_starting_up, thread);
780 mono_threads_unlock ();
781 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
787 stack_size = default_stacksize_for_thread (internal);
789 /* Create suspended, so we can do some housekeeping before the thread
792 create_flags = CREATE_SUSPENDED;
794 MONO_PREPARE_BLOCKING
795 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
796 stack_size, create_flags, &tid);
799 if (thread_handle == NULL) {
800 /* The thread couldn't be created, so throw an exception */
801 mono_threads_lock ();
802 mono_g_hash_table_remove (threads_starting_up, thread);
803 mono_threads_unlock ();
805 if (throw_on_failure)
806 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
808 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
811 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
813 internal->handle = thread_handle;
814 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
816 internal->threadpool_thread = threadpool_thread;
817 if (threadpool_thread)
818 mono_thread_set_state (internal, ThreadState_Background);
820 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
822 /* Only store the handle when the thread is about to be
823 * launched, to avoid the main thread deadlocking while trying
824 * to clean up a thread that will never be signalled.
826 if (!handle_store (thread, FALSE))
829 MONO_PREPARE_BLOCKING
830 mono_thread_info_resume (tid);
833 if (internal->start_notify) {
835 * Wait for the thread to set up its TLS data etc, so
836 * theres no potential race condition if someone tries
837 * to look up the data believing the thread has
840 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
842 MONO_PREPARE_BLOCKING
843 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
846 CloseHandle (internal->start_notify);
847 internal->start_notify = NULL;
850 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
855 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
857 if (mono_thread_start_cb) {
858 mono_thread_start_cb (tid, stack_start, func);
862 void mono_threads_set_default_stacksize (guint32 stacksize)
864 default_stacksize = stacksize;
867 guint32 mono_threads_get_default_stacksize (void)
869 return default_stacksize;
873 * mono_thread_create_internal:
877 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
880 MonoInternalThread *internal;
881 StartInfo *start_info;
884 thread = create_thread_object (domain);
885 internal = create_internal_thread ();
886 MONO_OBJECT_SETREF (thread, internal_thread, internal);
888 start_info = g_new0 (StartInfo, 1);
889 start_info->func = func;
890 start_info->obj = thread;
891 start_info->start_arg = arg;
893 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
897 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
898 if (mono_check_corlib_version () == NULL)
899 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
905 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
907 mono_thread_create_internal (domain, func, arg, FALSE, 0);
911 mono_thread_attach (MonoDomain *domain)
913 return mono_thread_attach_full (domain, FALSE);
917 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
919 MonoThreadInfo *info;
920 MonoInternalThread *thread;
921 MonoThread *current_thread;
922 HANDLE thread_handle;
925 if ((thread = mono_thread_internal_current ())) {
926 if (domain != mono_domain_get ())
927 mono_domain_set (domain, TRUE);
928 /* Already attached */
929 return mono_thread_current ();
932 if (!mono_gc_register_thread (&domain)) {
933 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 ());
936 thread = create_internal_thread ();
938 thread_handle = mono_thread_info_open_handle ();
939 g_assert (thread_handle);
941 tid=GetCurrentThreadId ();
943 thread->handle=thread_handle;
945 thread->stack_ptr = &tid;
947 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
949 info = mono_thread_info_current ();
951 thread->thread_info = info;
952 thread->small_id = info->small_id;
954 current_thread = new_thread_with_internal (domain, thread);
956 if (!handle_store (current_thread, force_attach)) {
957 /* Mono is shutting down, so just wait for the end */
962 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
964 SET_CURRENT_OBJECT (thread);
965 mono_domain_set (domain, TRUE);
967 thread_adjust_static_data (thread);
969 init_root_domain_thread (thread, current_thread);
970 if (domain != mono_get_root_domain ())
971 set_current_thread_for_domain (domain, thread, current_thread);
974 if (mono_thread_attach_cb) {
978 mono_thread_info_get_stack_bounds (&staddr, &stsize);
981 mono_thread_attach_cb (tid, &tid);
983 mono_thread_attach_cb (tid, staddr + stsize);
986 // FIXME: Need a separate callback
987 mono_profiler_thread_start (tid);
989 return current_thread;
993 mono_thread_detach_internal (MonoInternalThread *thread)
995 g_return_if_fail (thread != NULL);
997 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
999 thread_cleanup (thread);
1001 SET_CURRENT_OBJECT (NULL);
1002 mono_domain_unset ();
1004 /* Don't need to CloseHandle this thread, even though we took a
1005 * reference in mono_thread_attach (), because the GC will do it
1006 * when the Thread object is finalised.
1011 mono_thread_detach (MonoThread *thread)
1014 mono_thread_detach_internal (thread->internal_thread);
1018 * mono_thread_detach_if_exiting:
1020 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1021 * This should be used at the end of embedding code which calls into managed code, and which
1022 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1025 mono_thread_detach_if_exiting (void)
1027 if (mono_thread_info_is_exiting ()) {
1028 MonoInternalThread *thread;
1030 thread = mono_thread_internal_current ();
1032 mono_thread_detach_internal (thread);
1033 mono_thread_info_detach ();
1041 MonoInternalThread *thread = mono_thread_internal_current ();
1043 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1045 thread_cleanup (thread);
1046 SET_CURRENT_OBJECT (NULL);
1047 mono_domain_unset ();
1049 /* we could add a callback here for embedders to use. */
1050 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1051 exit (mono_environment_exitcode_get ());
1052 mono_thread_info_exit ();
1056 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1058 MonoInternalThread *internal = create_internal_thread ();
1060 internal->state = ThreadState_Unstarted;
1062 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1066 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this,
1069 StartInfo *start_info;
1070 MonoInternalThread *internal;
1073 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1075 if (!this->internal_thread)
1076 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1077 internal = this->internal_thread;
1079 LOCK_THREAD (internal);
1081 if ((internal->state & ThreadState_Unstarted) == 0) {
1082 UNLOCK_THREAD (internal);
1083 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1087 if ((internal->state & ThreadState_Aborted) != 0) {
1088 UNLOCK_THREAD (internal);
1091 /* This is freed in start_wrapper */
1092 start_info = g_new0 (StartInfo, 1);
1093 start_info->func = NULL;
1094 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1095 start_info->delegate = start;
1096 start_info->obj = this;
1097 g_assert (this->obj.vtable->domain == mono_domain_get ());
1099 res = create_thread (this, internal, start_info, FALSE, 0, FALSE);
1101 UNLOCK_THREAD (internal);
1105 internal->state &= ~ThreadState_Unstarted;
1107 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1109 UNLOCK_THREAD (internal);
1110 return internal->handle;
1114 * This is called from the finalizer of the internal thread object.
1117 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1119 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1122 * Since threads keep a reference to their thread object while running, by the time this function is called,
1123 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1124 * when thread_cleanup () can be called after this.
1127 CloseHandle (thread);
1129 if (this->synch_cs) {
1130 mono_mutex_t *synch_cs = this->synch_cs;
1131 this->synch_cs = NULL;
1132 mono_mutex_destroy (synch_cs);
1137 void *name = this->name;
1144 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1147 MonoInternalThread *thread = mono_thread_internal_current ();
1149 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1151 mono_thread_current_check_pending_interrupt ();
1154 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1156 MONO_PREPARE_BLOCKING
1157 res = SleepEx(ms,TRUE);
1158 MONO_FINISH_BLOCKING
1160 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1162 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1163 MonoException* exc = mono_thread_execute_interruption (thread);
1165 mono_raise_exception (exc);
1177 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1182 ves_icall_System_Threading_Thread_GetDomainID (void)
1184 return mono_domain_get()->domain_id;
1188 ves_icall_System_Threading_Thread_Yield (void)
1190 return mono_thread_info_yield ();
1194 * mono_thread_get_name:
1196 * Return the name of the thread. NAME_LEN is set to the length of the name.
1197 * Return NULL if the thread has no name. The returned memory is owned by the
1201 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1205 LOCK_THREAD (this_obj);
1207 if (!this_obj->name) {
1211 *name_len = this_obj->name_len;
1212 res = g_new (gunichar2, this_obj->name_len);
1213 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1216 UNLOCK_THREAD (this_obj);
1222 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1226 LOCK_THREAD (this_obj);
1228 if (!this_obj->name)
1231 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1233 UNLOCK_THREAD (this_obj);
1239 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1241 LOCK_THREAD (this_obj);
1243 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1244 UNLOCK_THREAD (this_obj);
1246 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1249 if (this_obj->name) {
1250 g_free (this_obj->name);
1251 this_obj->name_len = 0;
1254 this_obj->name = g_new (gunichar2, mono_string_length (name));
1255 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1256 this_obj->name_len = mono_string_length (name);
1259 this_obj->name = NULL;
1262 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1264 UNLOCK_THREAD (this_obj);
1266 if (this_obj->name && this_obj->tid) {
1267 char *tname = mono_string_to_utf8 (name);
1268 mono_profiler_thread_name (this_obj->tid, tname);
1269 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1275 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1277 mono_thread_set_name_internal (this_obj, name, TRUE);
1281 ves_icall_System_Threading_Thread_GetPriority (MonoInternalThread *thread)
1283 return ThreadPriority_Lowest;
1287 ves_icall_System_Threading_Thread_SetPriority (MonoInternalThread *thread, int priority)
1291 /* If the array is already in the requested domain, we just return it,
1292 otherwise we return a copy in that domain. */
1294 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1301 if (mono_object_domain (arr) == domain)
1304 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1305 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1310 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1312 return byte_array_to_domain (arr, mono_get_root_domain ());
1316 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1318 return byte_array_to_domain (arr, mono_domain_get ());
1322 mono_thread_current (void)
1324 MonoDomain *domain = mono_domain_get ();
1325 MonoInternalThread *internal = mono_thread_internal_current ();
1326 MonoThread **current_thread_ptr;
1328 g_assert (internal);
1329 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1331 if (!*current_thread_ptr) {
1332 g_assert (domain != mono_get_root_domain ());
1333 *current_thread_ptr = new_thread_with_internal (domain, internal);
1335 return *current_thread_ptr;
1339 mono_thread_internal_current (void)
1341 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1342 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1347 ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1348 int ms, HANDLE thread)
1350 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1353 mono_thread_current_check_pending_interrupt ();
1357 if ((this->state & ThreadState_Unstarted) != 0) {
1358 UNLOCK_THREAD (this);
1360 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1364 UNLOCK_THREAD (this);
1369 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1371 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1373 MONO_PREPARE_BLOCKING
1374 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1375 MONO_FINISH_BLOCKING
1377 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1379 if(ret==WAIT_OBJECT_0) {
1380 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1385 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1391 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1399 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1401 MONO_PREPARE_BLOCKING
1403 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1405 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1406 MONO_FINISH_BLOCKING
1408 if (ret != WAIT_IO_COMPLETION)
1411 exc = mono_thread_execute_interruption (thread);
1413 mono_raise_exception (exc);
1418 /* Re-calculate ms according to the time passed */
1419 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1420 if (diff_ms >= ms) {
1424 wait = ms - diff_ms;
1430 /* FIXME: exitContext isnt documented */
1431 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1437 MonoObject *waitHandle;
1438 MonoInternalThread *thread = mono_thread_internal_current ();
1440 /* Do this WaitSleepJoin check before creating objects */
1441 mono_thread_current_check_pending_interrupt ();
1443 /* We fail in managed if the array has more than 64 elements */
1444 numhandles = (guint32)mono_array_length(mono_handles);
1445 handles = g_new0(HANDLE, numhandles);
1447 for(i = 0; i < numhandles; i++) {
1448 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1449 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1456 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1458 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1460 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1464 if(ret==WAIT_FAILED) {
1465 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1467 } else if(ret==WAIT_TIMEOUT) {
1468 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1475 /* FIXME: exitContext isnt documented */
1476 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1478 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1479 uintptr_t numhandles;
1482 MonoObject *waitHandle;
1483 MonoInternalThread *thread = mono_thread_internal_current ();
1485 /* Do this WaitSleepJoin check before creating objects */
1486 mono_thread_current_check_pending_interrupt ();
1488 numhandles = mono_array_length(mono_handles);
1489 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1492 for(i = 0; i < numhandles; i++) {
1493 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1494 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1501 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1503 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1505 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1507 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1510 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1512 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1513 return ret - WAIT_OBJECT_0;
1515 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1516 return ret - WAIT_ABANDONED_0;
1523 /* FIXME: exitContext isnt documented */
1524 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1527 MonoInternalThread *thread = mono_thread_internal_current ();
1529 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1535 mono_thread_current_check_pending_interrupt ();
1537 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1539 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1541 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1543 if(ret==WAIT_FAILED) {
1544 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1546 } else if(ret==WAIT_TIMEOUT) {
1547 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1555 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1558 MonoInternalThread *thread = mono_thread_internal_current ();
1563 mono_thread_current_check_pending_interrupt ();
1565 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1567 MONO_PREPARE_BLOCKING
1568 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1569 MONO_FINISH_BLOCKING
1571 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1573 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1576 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1583 mutex = CreateMutex (NULL, owned, NULL);
1585 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1587 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1595 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1596 return(ReleaseMutex (handle));
1599 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1605 *error = ERROR_SUCCESS;
1607 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1609 *error = GetLastError ();
1616 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1623 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1625 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1626 mono_string_chars (name));
1628 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1636 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1640 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1645 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1649 *error = ERROR_SUCCESS;
1651 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1653 *error = GetLastError ();
1659 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1666 event = CreateEvent (NULL, manual, initial, NULL);
1668 event = CreateEvent (NULL, manual, initial,
1669 mono_string_chars (name));
1671 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1679 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1680 return (SetEvent(handle));
1683 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1684 return (ResetEvent(handle));
1688 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1689 CloseHandle (handle);
1692 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1698 *error = ERROR_SUCCESS;
1700 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1702 *error = GetLastError ();
1708 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1710 return InterlockedIncrement (location);
1713 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1715 #if SIZEOF_VOID_P == 4
1716 if (G_UNLIKELY ((size_t)location & 0x7)) {
1718 mono_interlocked_lock ();
1721 mono_interlocked_unlock ();
1725 return InterlockedIncrement64 (location);
1728 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1730 return InterlockedDecrement(location);
1733 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1735 #if SIZEOF_VOID_P == 4
1736 if (G_UNLIKELY ((size_t)location & 0x7)) {
1738 mono_interlocked_lock ();
1741 mono_interlocked_unlock ();
1745 return InterlockedDecrement64 (location);
1748 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1750 return InterlockedExchange(location, value);
1753 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1756 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1757 mono_gc_wbarrier_generic_nostore (location);
1761 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1763 return InterlockedExchangePointer(location, value);
1766 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1768 IntFloatUnion val, ret;
1771 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1777 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1779 #if SIZEOF_VOID_P == 4
1780 if (G_UNLIKELY ((size_t)location & 0x7)) {
1782 mono_interlocked_lock ();
1785 mono_interlocked_unlock ();
1789 return InterlockedExchange64 (location, value);
1793 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1795 LongDoubleUnion val, ret;
1798 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1803 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1805 return InterlockedCompareExchange(location, value, comparand);
1808 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1810 gint32 r = InterlockedCompareExchange(location, value, comparand);
1811 *success = r == comparand;
1815 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1818 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1819 mono_gc_wbarrier_generic_nostore (location);
1823 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1825 return InterlockedCompareExchangePointer(location, value, comparand);
1828 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1830 IntFloatUnion val, ret, cmp;
1833 cmp.fval = comparand;
1834 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1840 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1842 #if SIZEOF_VOID_P == 8
1843 LongDoubleUnion val, comp, ret;
1846 comp.fval = comparand;
1847 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1853 mono_interlocked_lock ();
1855 if (old == comparand)
1857 mono_interlocked_unlock ();
1864 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1866 #if SIZEOF_VOID_P == 4
1867 if (G_UNLIKELY ((size_t)location & 0x7)) {
1869 mono_interlocked_lock ();
1871 if (old == comparand)
1873 mono_interlocked_unlock ();
1877 return InterlockedCompareExchange64 (location, value, comparand);
1881 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1884 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1885 mono_gc_wbarrier_generic_nostore (location);
1890 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1893 res = InterlockedExchangePointer ((gpointer *)location, value);
1894 mono_gc_wbarrier_generic_nostore (location);
1899 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1901 return InterlockedAdd (location, value);
1905 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1907 #if SIZEOF_VOID_P == 4
1908 if (G_UNLIKELY ((size_t)location & 0x7)) {
1910 mono_interlocked_lock ();
1913 mono_interlocked_unlock ();
1917 return InterlockedAdd64 (location, value);
1921 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1923 #if SIZEOF_VOID_P == 4
1924 if (G_UNLIKELY ((size_t)location & 0x7)) {
1926 mono_interlocked_lock ();
1928 mono_interlocked_unlock ();
1932 return InterlockedRead64 (location);
1936 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1938 mono_memory_barrier ();
1942 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1944 mono_thread_clr_state (this, state);
1946 if (state & ThreadState_Background) {
1947 /* If the thread changes the background mode, the main thread has to
1948 * be notified, since it has to rebuild the list of threads to
1951 SetEvent (background_change_event);
1956 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1958 mono_thread_set_state (this, state);
1960 if (state & ThreadState_Background) {
1961 /* If the thread changes the background mode, the main thread has to
1962 * be notified, since it has to rebuild the list of threads to
1965 SetEvent (background_change_event);
1970 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
1976 state = this->state;
1978 UNLOCK_THREAD (this);
1983 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
1985 MonoInternalThread *current;
1990 current = mono_thread_internal_current ();
1992 this->thread_interrupt_requested = TRUE;
1993 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
1995 UNLOCK_THREAD (this);
1998 abort_thread_internal (this, TRUE, FALSE);
2002 void mono_thread_current_check_pending_interrupt ()
2004 MonoInternalThread *thread = mono_thread_internal_current ();
2005 gboolean throw = FALSE;
2007 LOCK_THREAD (thread);
2009 if (thread->thread_interrupt_requested) {
2011 thread->thread_interrupt_requested = FALSE;
2014 UNLOCK_THREAD (thread);
2017 mono_raise_exception (mono_get_exception_thread_interrupted ());
2022 mono_thread_get_abort_signal (void)
2024 #if defined (HOST_WIN32) || !defined (HAVE_SIGACTION)
2026 #elif defined(PLATFORM_ANDROID)
2028 #elif !defined (SIGRTMIN)
2033 #endif /* SIGUSR1 */
2035 static int abort_signum = -1;
2037 if (abort_signum != -1)
2038 return abort_signum;
2039 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2040 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2041 struct sigaction sinfo;
2042 sigaction (i, NULL, &sinfo);
2043 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2048 /* fallback to the old way */
2050 #endif /* HOST_WIN32 */
2054 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2056 MonoException* exc = mono_thread_request_interruption (FALSE);
2057 if (exc) mono_raise_exception (exc);
2059 #endif /* HOST_WIN32 */
2062 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2064 LOCK_THREAD (thread);
2066 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2067 (thread->state & ThreadState_StopRequested) != 0 ||
2068 (thread->state & ThreadState_Stopped) != 0)
2070 UNLOCK_THREAD (thread);
2074 if ((thread->state & ThreadState_Unstarted) != 0) {
2075 thread->state |= ThreadState_Aborted;
2076 UNLOCK_THREAD (thread);
2080 thread->state |= ThreadState_AbortRequested;
2081 if (thread->abort_state_handle)
2082 mono_gchandle_free (thread->abort_state_handle);
2084 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2085 g_assert (thread->abort_state_handle);
2087 thread->abort_state_handle = 0;
2089 thread->abort_exc = NULL;
2091 UNLOCK_THREAD (thread);
2093 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2095 /* During shutdown, we can't wait for other threads */
2097 /* Make sure the thread is awake */
2098 mono_thread_resume (thread);
2100 abort_thread_internal (thread, TRUE, TRUE);
2104 ves_icall_System_Threading_Thread_ResetAbort (void)
2106 MonoInternalThread *thread = mono_thread_internal_current ();
2107 gboolean was_aborting;
2109 LOCK_THREAD (thread);
2110 was_aborting = thread->state & ThreadState_AbortRequested;
2111 thread->state &= ~ThreadState_AbortRequested;
2112 UNLOCK_THREAD (thread);
2114 if (!was_aborting) {
2115 const char *msg = "Unable to reset abort because no abort was requested";
2116 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2119 thread->abort_exc = NULL;
2120 if (thread->abort_state_handle) {
2121 mono_gchandle_free (thread->abort_state_handle);
2122 /* This is actually not necessary - the handle
2123 only counts if the exception is set */
2124 thread->abort_state_handle = 0;
2129 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2131 LOCK_THREAD (thread);
2133 thread->state &= ~ThreadState_AbortRequested;
2135 if (thread->abort_exc) {
2136 thread->abort_exc = NULL;
2137 if (thread->abort_state_handle) {
2138 mono_gchandle_free (thread->abort_state_handle);
2139 /* This is actually not necessary - the handle
2140 only counts if the exception is set */
2141 thread->abort_state_handle = 0;
2145 UNLOCK_THREAD (thread);
2149 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2151 MonoInternalThread *thread = this->internal_thread;
2152 MonoObject *state, *deserialized = NULL, *exc;
2155 if (!thread->abort_state_handle)
2158 state = mono_gchandle_get_target (thread->abort_state_handle);
2161 domain = mono_domain_get ();
2162 if (mono_object_domain (state) == domain)
2165 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2167 if (!deserialized) {
2168 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2170 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2171 mono_set_pending_exception (invalid_op_exc);
2175 return deserialized;
2179 mono_thread_suspend (MonoInternalThread *thread)
2181 LOCK_THREAD (thread);
2183 if ((thread->state & ThreadState_Unstarted) != 0 ||
2184 (thread->state & ThreadState_Aborted) != 0 ||
2185 (thread->state & ThreadState_Stopped) != 0)
2187 UNLOCK_THREAD (thread);
2191 if ((thread->state & ThreadState_Suspended) != 0 ||
2192 (thread->state & ThreadState_SuspendRequested) != 0 ||
2193 (thread->state & ThreadState_StopRequested) != 0)
2195 UNLOCK_THREAD (thread);
2199 thread->state |= ThreadState_SuspendRequested;
2201 UNLOCK_THREAD (thread);
2203 suspend_thread_internal (thread, FALSE);
2208 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2210 if (!mono_thread_suspend (thread)) {
2211 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2217 mono_thread_resume (MonoInternalThread *thread)
2219 LOCK_THREAD (thread);
2221 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2222 thread->state &= ~ThreadState_SuspendRequested;
2223 UNLOCK_THREAD (thread);
2227 if ((thread->state & ThreadState_Suspended) == 0 ||
2228 (thread->state & ThreadState_Unstarted) != 0 ||
2229 (thread->state & ThreadState_Aborted) != 0 ||
2230 (thread->state & ThreadState_Stopped) != 0)
2232 UNLOCK_THREAD (thread);
2236 return resume_thread_internal (thread);
2240 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2242 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread)) {
2243 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2249 mono_threads_is_critical_method (MonoMethod *method)
2251 switch (method->wrapper_type) {
2252 case MONO_WRAPPER_RUNTIME_INVOKE:
2253 case MONO_WRAPPER_XDOMAIN_INVOKE:
2254 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2261 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2266 if (mono_threads_is_critical_method (m)) {
2267 *((gboolean*)data) = TRUE;
2274 is_running_protected_wrapper (void)
2276 gboolean found = FALSE;
2277 mono_stack_walk (find_wrapper, &found);
2281 void mono_thread_internal_stop (MonoInternalThread *thread)
2283 LOCK_THREAD (thread);
2285 if ((thread->state & ThreadState_StopRequested) != 0 ||
2286 (thread->state & ThreadState_Stopped) != 0)
2288 UNLOCK_THREAD (thread);
2292 /* Make sure the thread is awake */
2293 mono_thread_resume (thread);
2295 thread->state |= ThreadState_StopRequested;
2296 thread->state &= ~ThreadState_AbortRequested;
2298 UNLOCK_THREAD (thread);
2300 abort_thread_internal (thread, TRUE, TRUE);
2303 void mono_thread_stop (MonoThread *thread)
2305 mono_thread_internal_stop (thread->internal_thread);
2309 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2312 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2317 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2320 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2325 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2328 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2333 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2336 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2341 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2344 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2345 return (void *) tmp;
2349 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2351 volatile MonoObject *tmp;
2352 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2353 return (MonoObject *) tmp;
2357 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2360 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2365 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2368 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2373 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2375 return InterlockedRead8 (ptr);
2379 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2381 return InterlockedRead16 (ptr);
2385 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2387 return InterlockedRead (ptr);
2391 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2393 #if SIZEOF_VOID_P == 4
2394 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2396 mono_interlocked_lock ();
2397 val = *(gint64*)ptr;
2398 mono_interlocked_unlock ();
2402 return InterlockedRead64 (ptr);
2406 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2408 return InterlockedReadPointer (ptr);
2412 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2416 #if SIZEOF_VOID_P == 4
2417 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2419 mono_interlocked_lock ();
2420 val = *(double*)ptr;
2421 mono_interlocked_unlock ();
2426 u.ival = InterlockedRead64 (ptr);
2432 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2436 u.ival = InterlockedRead (ptr);
2442 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2444 return InterlockedReadPointer (ptr);
2448 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2450 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2454 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2456 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2460 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2462 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2466 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2468 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2472 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2474 mono_atomic_store_release ((volatile void **) ptr, value);
2478 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2480 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2484 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2486 mono_atomic_store_release ((volatile double *) ptr, value);
2490 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2492 mono_atomic_store_release ((volatile float *) ptr, value);
2496 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2498 InterlockedWrite8 (ptr, value);
2502 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2504 InterlockedWrite16 (ptr, value);
2508 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2510 InterlockedWrite (ptr, value);
2514 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2516 #if SIZEOF_VOID_P == 4
2517 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2518 mono_interlocked_lock ();
2519 *(gint64*)ptr = value;
2520 mono_interlocked_unlock ();
2525 InterlockedWrite64 (ptr, value);
2529 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2531 InterlockedWritePointer (ptr, value);
2535 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2539 #if SIZEOF_VOID_P == 4
2540 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2541 mono_interlocked_lock ();
2542 *(double*)ptr = value;
2543 mono_interlocked_unlock ();
2550 InterlockedWrite64 (ptr, u.ival);
2554 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2560 InterlockedWrite (ptr, u.ival);
2564 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2566 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2570 mono_thread_init_tls (void)
2572 MONO_FAST_TLS_INIT (tls_current_object);
2573 mono_native_tls_alloc (¤t_object_key, NULL);
2576 void mono_thread_init (MonoThreadStartCB start_cb,
2577 MonoThreadAttachCB attach_cb)
2579 mono_mutex_init_recursive(&threads_mutex);
2580 mono_mutex_init_recursive(&interlocked_mutex);
2581 mono_mutex_init_recursive(&contexts_mutex);
2582 mono_mutex_init_recursive(&joinable_threads_mutex);
2584 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2585 g_assert(background_change_event != NULL);
2587 mono_init_static_data_info (&thread_static_info);
2588 mono_init_static_data_info (&context_static_info);
2590 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2592 mono_thread_start_cb = start_cb;
2593 mono_thread_attach_cb = attach_cb;
2595 /* Get a pseudo handle to the current process. This is just a
2596 * kludge so that wapi can build a process handle if needed.
2597 * As a pseudo handle is returned, we don't need to clean
2600 GetCurrentProcess ();
2603 void mono_thread_cleanup (void)
2605 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2606 MonoThreadInfo *info;
2608 /* The main thread must abandon any held mutexes (particularly
2609 * important for named mutexes as they are shared across
2610 * processes, see bug 74680.) This will happen when the
2611 * thread exits, but if it's not running in a subthread it
2612 * won't exit in time.
2614 info = mono_thread_info_current ();
2615 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2619 /* This stuff needs more testing, it seems one of these
2620 * critical sections can be locked when mono_thread_cleanup is
2623 mono_mutex_destroy (&threads_mutex);
2624 mono_mutex_destroy (&interlocked_mutex);
2625 mono_mutex_destroy (&contexts_mutex);
2626 mono_mutex_destroy (&delayed_free_table_mutex);
2627 mono_mutex_destroy (&small_id_mutex);
2628 CloseHandle (background_change_event);
2631 mono_native_tls_free (current_object_key);
2635 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2637 mono_thread_cleanup_fn = func;
2641 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2643 thread->internal_thread->manage_callback = func;
2646 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2648 mono_thread_notify_pending_exc_fn = func;
2652 static void print_tids (gpointer key, gpointer value, gpointer user)
2654 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2655 * sizeof(uint) and a cast to uint would overflow
2657 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2658 * print this as a pointer.
2660 g_message ("Waiting for: %p", key);
2665 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2666 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2670 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2674 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2676 MONO_PREPARE_BLOCKING
2677 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2678 MONO_FINISH_BLOCKING
2680 if(ret==WAIT_FAILED) {
2681 /* See the comment in build_wait_tids() */
2682 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2686 for(i=0; i<wait->num; i++)
2687 CloseHandle (wait->handles[i]);
2689 if (ret == WAIT_TIMEOUT)
2692 for(i=0; i<wait->num; i++) {
2693 gsize tid = wait->threads[i]->tid;
2696 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2697 * it can still run io-layer etc. code. So wait for it to really exit.
2698 * FIXME: This won't join threads which are not in the joinable_hash yet.
2700 mono_thread_join ((gpointer)tid);
2702 mono_threads_lock ();
2703 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2704 /* This thread must have been killed, because
2705 * it hasn't cleaned itself up. (It's just
2706 * possible that the thread exited before the
2707 * parent thread had a chance to store the
2708 * handle, and now there is another pointer to
2709 * the already-exited thread stored. In this
2710 * case, we'll just get two
2711 * mono_profiler_thread_end() calls for the
2715 mono_threads_unlock ();
2716 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2717 thread_cleanup (wait->threads[i]);
2719 mono_threads_unlock ();
2724 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2726 guint32 i, ret, count;
2728 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2730 /* Add the thread state change event, so it wakes up if a thread changes
2731 * to background mode.
2734 if (count < MAXIMUM_WAIT_OBJECTS) {
2735 wait->handles [count] = background_change_event;
2739 MONO_PREPARE_BLOCKING
2740 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2741 MONO_FINISH_BLOCKING
2743 if(ret==WAIT_FAILED) {
2744 /* See the comment in build_wait_tids() */
2745 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2749 for(i=0; i<wait->num; i++)
2750 CloseHandle (wait->handles[i]);
2752 if (ret == WAIT_TIMEOUT)
2755 if (ret < wait->num) {
2756 gsize tid = wait->threads[ret]->tid;
2757 mono_threads_lock ();
2758 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2759 /* See comment in wait_for_tids about thread cleanup */
2760 mono_threads_unlock ();
2761 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2762 thread_cleanup (wait->threads [ret]);
2764 mono_threads_unlock ();
2768 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2770 struct wait_data *wait=(struct wait_data *)user;
2772 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2774 MonoInternalThread *thread=(MonoInternalThread *)value;
2776 /* Ignore background threads, we abort them later */
2777 /* Do not lock here since it is not needed and the caller holds threads_lock */
2778 if (thread->state & ThreadState_Background) {
2779 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2780 return; /* just leave, ignore */
2783 if (mono_gc_is_finalizer_internal_thread (thread)) {
2784 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2788 if (thread == mono_thread_internal_current ()) {
2789 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2793 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2794 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2798 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2799 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2803 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2804 if (handle == NULL) {
2805 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2809 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2810 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2811 wait->handles[wait->num]=handle;
2812 wait->threads[wait->num]=thread;
2815 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2817 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2822 /* Just ignore the rest, we can't do anything with
2829 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2831 struct wait_data *wait=(struct wait_data *)user;
2832 gsize self = GetCurrentThreadId ();
2833 MonoInternalThread *thread = value;
2836 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2839 /* The finalizer thread is not a background thread */
2840 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2841 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2843 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
2847 /* printf ("A: %d\n", wait->num); */
2848 wait->handles[wait->num]=thread->handle;
2849 wait->threads[wait->num]=thread;
2852 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2853 mono_thread_internal_stop (thread);
2857 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2861 * mono_threads_set_shutting_down:
2863 * Is called by a thread that wants to shut down Mono. If the runtime is already
2864 * shutting down, the calling thread is suspended/stopped, and this function never
2868 mono_threads_set_shutting_down (void)
2870 MonoInternalThread *current_thread = mono_thread_internal_current ();
2872 mono_threads_lock ();
2874 if (shutting_down) {
2875 mono_threads_unlock ();
2877 /* Make sure we're properly suspended/stopped */
2879 LOCK_THREAD (current_thread);
2881 if ((current_thread->state & ThreadState_SuspendRequested) ||
2882 (current_thread->state & ThreadState_AbortRequested) ||
2883 (current_thread->state & ThreadState_StopRequested)) {
2884 UNLOCK_THREAD (current_thread);
2885 mono_thread_execute_interruption (current_thread);
2887 current_thread->state |= ThreadState_Stopped;
2888 UNLOCK_THREAD (current_thread);
2891 /*since we're killing the thread, unset the current domain.*/
2892 mono_domain_unset ();
2894 /* Wake up other threads potentially waiting for us */
2895 mono_thread_info_exit ();
2897 shutting_down = TRUE;
2899 /* Not really a background state change, but this will
2900 * interrupt the main thread if it is waiting for all
2901 * the other threads.
2903 SetEvent (background_change_event);
2905 mono_threads_unlock ();
2909 void mono_thread_manage (void)
2911 struct wait_data wait_data;
2912 struct wait_data *wait = &wait_data;
2914 memset (wait, 0, sizeof (struct wait_data));
2915 /* join each thread that's still running */
2916 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2918 mono_threads_lock ();
2920 THREAD_DEBUG (g_message("%s: No threads", __func__));
2921 mono_threads_unlock ();
2924 mono_threads_unlock ();
2927 mono_threads_lock ();
2928 if (shutting_down) {
2929 /* somebody else is shutting down */
2930 mono_threads_unlock ();
2933 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2934 mono_g_hash_table_foreach (threads, print_tids, NULL));
2936 ResetEvent (background_change_event);
2938 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2939 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2940 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2941 mono_threads_unlock ();
2943 /* Something to wait for */
2944 wait_for_tids_or_state_change (wait, INFINITE);
2946 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2947 } while(wait->num>0);
2949 /* Mono is shutting down, so just wait for the end */
2950 if (!mono_runtime_try_shutdown ()) {
2951 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2952 mono_thread_suspend (mono_thread_internal_current ());
2953 mono_thread_execute_interruption (mono_thread_internal_current ());
2957 * Remove everything but the finalizer thread and self.
2958 * Also abort all the background threads
2961 mono_threads_lock ();
2964 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2965 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2966 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2968 mono_threads_unlock ();
2970 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2972 /* Something to wait for */
2973 wait_for_tids (wait, INFINITE);
2975 } while (wait->num > 0);
2978 * give the subthreads a chance to really quit (this is mainly needed
2979 * to get correct user and system times from getrusage/wait/time(1)).
2980 * This could be removed if we avoid pthread_detach() and use pthread_join().
2982 mono_thread_info_yield ();
2985 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2987 MonoInternalThread *thread=(MonoInternalThread *)value;
2989 if(thread->tid != (gsize)user) {
2990 /*TerminateThread (thread->handle, -1);*/
2994 void mono_thread_abort_all_other_threads (void)
2996 gsize self = GetCurrentThreadId ();
2998 mono_threads_lock ();
2999 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
3000 mono_g_hash_table_size (threads));
3001 mono_g_hash_table_foreach (threads, print_tids, NULL));
3003 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3005 mono_threads_unlock ();
3009 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3011 MonoInternalThread *thread = (MonoInternalThread*)value;
3012 struct wait_data *wait = (struct wait_data*)user_data;
3016 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3018 * This needs no locking.
3020 if ((thread->state & ThreadState_Suspended) != 0 ||
3021 (thread->state & ThreadState_Stopped) != 0)
3024 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3025 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3029 wait->handles [wait->num] = handle;
3030 wait->threads [wait->num] = thread;
3036 * mono_thread_suspend_all_other_threads:
3038 * Suspend all managed threads except the finalizer thread and this thread. It is
3039 * not possible to resume them later.
3041 void mono_thread_suspend_all_other_threads (void)
3043 struct wait_data wait_data;
3044 struct wait_data *wait = &wait_data;
3046 gsize self = GetCurrentThreadId ();
3047 guint32 eventidx = 0;
3048 gboolean starting, finished;
3050 memset (wait, 0, sizeof (struct wait_data));
3052 * The other threads could be in an arbitrary state at this point, i.e.
3053 * they could be starting up, shutting down etc. This means that there could be
3054 * threads which are not even in the threads hash table yet.
3058 * First we set a barrier which will be checked by all threads before they
3059 * are added to the threads hash table, and they will exit if the flag is set.
3060 * This ensures that no threads could be added to the hash later.
3061 * We will use shutting_down as the barrier for now.
3063 g_assert (shutting_down);
3066 * We make multiple calls to WaitForMultipleObjects since:
3067 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3068 * - some threads could exit without becoming suspended
3073 * Make a copy of the hashtable since we can't do anything with
3074 * threads while threads_mutex is held.
3077 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3078 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3079 mono_threads_lock ();
3080 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3081 mono_threads_unlock ();
3084 /* Get the suspended events that we'll be waiting for */
3085 for (i = 0; i < wait->num; ++i) {
3086 MonoInternalThread *thread = wait->threads [i];
3088 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3089 //CloseHandle (wait->handles [i]);
3090 wait->threads [i] = NULL; /* ignore this thread in next loop */
3094 LOCK_THREAD (thread);
3096 if ((thread->state & ThreadState_Suspended) != 0 ||
3097 (thread->state & ThreadState_StopRequested) != 0 ||
3098 (thread->state & ThreadState_Stopped) != 0) {
3099 UNLOCK_THREAD (thread);
3100 CloseHandle (wait->handles [i]);
3101 wait->threads [i] = NULL; /* ignore this thread in next loop */
3107 /* Convert abort requests into suspend requests */
3108 if ((thread->state & ThreadState_AbortRequested) != 0)
3109 thread->state &= ~ThreadState_AbortRequested;
3111 thread->state |= ThreadState_SuspendRequested;
3113 UNLOCK_THREAD (thread);
3115 /* Signal the thread to suspend */
3116 suspend_thread_internal (thread, TRUE);
3118 if (eventidx <= 0) {
3120 * If there are threads which are starting up, we wait until they
3121 * are suspended when they try to register in the threads hash.
3122 * This is guaranteed to finish, since the threads which can create new
3123 * threads get suspended after a while.
3124 * FIXME: The finalizer thread can still create new threads.
3126 mono_threads_lock ();
3127 if (threads_starting_up)
3128 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3131 mono_threads_unlock ();
3141 collect_threads (gpointer key, gpointer value, gpointer user_data)
3143 MonoInternalThread *thread = (MonoInternalThread*)value;
3144 struct wait_data *wait = (struct wait_data*)user_data;
3147 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3148 handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3152 wait->handles [wait->num] = handle;
3153 wait->threads [wait->num] = thread;
3158 static gboolean thread_dump_requested;
3160 static G_GNUC_UNUSED gboolean
3161 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3163 GString *p = (GString*)data;
3164 MonoMethod *method = NULL;
3166 method = mono_jit_info_get_method (frame->ji);
3169 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3170 g_string_append_printf (p, " %s\n", location);
3173 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3178 static SuspendThreadResult
3179 print_thread_dump (MonoThreadInfo *info, gpointer ud)
3181 MonoInternalThread *thread = ud;
3182 GString* text = g_string_new (0);
3184 GError *error = NULL;
3187 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3189 g_string_append_printf (text, "\n\"%s\"", name);
3192 else if (thread->threadpool_thread)
3193 g_string_append (text, "\n\"<threadpool thread>\"");
3195 g_string_append (text, "\n\"<unnamed thread>\"");
3198 /* This no longer works with remote unwinding */
3200 wapi_desc = wapi_current_thread_desc ();
3201 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3206 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, text);
3208 fprintf (stdout, "%s", text->str);
3210 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3211 OutputDebugStringA(text->str);
3214 g_string_free (text, TRUE);
3216 return MonoResumeThread;
3220 dump_thread (gpointer key, gpointer value, gpointer user)
3222 MonoInternalThread *thread = (MonoInternalThread *)value;
3224 if (thread == mono_thread_internal_current ())
3228 FIXME This still can hang if we stop a thread during malloc.
3229 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3230 that takes a callback and runs it with the target suspended.
3231 We probably should loop a bit around trying to get it to either managed code
3234 mono_thread_info_safe_suspend_and_run ((MonoNativeThreadId)(gsize)thread->tid, FALSE, print_thread_dump, thread);
3238 mono_threads_perform_thread_dump (void)
3240 if (!thread_dump_requested)
3243 printf ("Full thread dump:\n");
3245 /* We take the loader lock and the root domain lock as to increase our odds of not deadlocking if
3246 something needs then in the process.
3248 mono_loader_lock ();
3249 mono_domain_lock (mono_get_root_domain ());
3251 mono_threads_lock ();
3252 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3253 mono_threads_unlock ();
3255 mono_domain_unlock (mono_get_root_domain ());
3256 mono_loader_unlock ();
3258 thread_dump_requested = FALSE;
3262 * mono_threads_request_thread_dump:
3264 * Ask all threads except the current to print their stacktrace to stdout.
3267 mono_threads_request_thread_dump (void)
3269 /*The new thread dump code runs out of the finalizer thread. */
3270 thread_dump_requested = TRUE;
3271 mono_gc_finalize_notify ();
3276 gint allocated; /* +1 so that refs [allocated] == NULL */
3280 typedef struct ref_stack RefStack;
3283 ref_stack_new (gint initial_size)
3287 initial_size = MAX (initial_size, 16) + 1;
3288 rs = g_new0 (RefStack, 1);
3289 rs->refs = g_new0 (gpointer, initial_size);
3290 rs->allocated = initial_size;
3295 ref_stack_destroy (gpointer ptr)
3306 ref_stack_push (RefStack *rs, gpointer ptr)
3308 g_assert (rs != NULL);
3310 if (rs->bottom >= rs->allocated) {
3311 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3312 rs->allocated <<= 1;
3313 rs->refs [rs->allocated] = NULL;
3315 rs->refs [rs->bottom++] = ptr;
3319 ref_stack_pop (RefStack *rs)
3321 if (rs == NULL || rs->bottom == 0)
3325 rs->refs [rs->bottom] = NULL;
3329 ref_stack_find (RefStack *rs, gpointer ptr)
3336 for (refs = rs->refs; refs && *refs; refs++) {
3344 * mono_thread_push_appdomain_ref:
3346 * Register that the current thread may have references to objects in domain
3347 * @domain on its stack. Each call to this function should be paired with a
3348 * call to pop_appdomain_ref.
3351 mono_thread_push_appdomain_ref (MonoDomain *domain)
3353 MonoInternalThread *thread = mono_thread_internal_current ();
3356 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3357 SPIN_LOCK (thread->lock_thread_id);
3358 if (thread->appdomain_refs == NULL)
3359 thread->appdomain_refs = ref_stack_new (16);
3360 ref_stack_push (thread->appdomain_refs, domain);
3361 SPIN_UNLOCK (thread->lock_thread_id);
3366 mono_thread_pop_appdomain_ref (void)
3368 MonoInternalThread *thread = mono_thread_internal_current ();
3371 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3372 SPIN_LOCK (thread->lock_thread_id);
3373 ref_stack_pop (thread->appdomain_refs);
3374 SPIN_UNLOCK (thread->lock_thread_id);
3379 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3382 SPIN_LOCK (thread->lock_thread_id);
3383 res = ref_stack_find (thread->appdomain_refs, domain);
3384 SPIN_UNLOCK (thread->lock_thread_id);
3389 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3391 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3394 typedef struct abort_appdomain_data {
3395 struct wait_data wait;
3397 } abort_appdomain_data;
3400 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3402 MonoInternalThread *thread = (MonoInternalThread*)value;
3403 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3404 MonoDomain *domain = data->domain;
3406 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3407 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3409 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3410 HANDLE handle = mono_threads_open_thread_handle (thread->handle, (MonoNativeThreadId)thread->tid);
3413 data->wait.handles [data->wait.num] = handle;
3414 data->wait.threads [data->wait.num] = thread;
3417 /* Just ignore the rest, we can't do anything with
3425 * mono_threads_abort_appdomain_threads:
3427 * Abort threads which has references to the given appdomain.
3430 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3432 #ifdef __native_client__
3436 abort_appdomain_data user_data;
3438 int orig_timeout = timeout;
3441 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3443 start_time = mono_msec_ticks ();
3445 mono_threads_lock ();
3447 user_data.domain = domain;
3448 user_data.wait.num = 0;
3449 /* This shouldn't take any locks */
3450 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3451 mono_threads_unlock ();
3453 if (user_data.wait.num > 0) {
3454 /* Abort the threads outside the threads lock */
3455 for (i = 0; i < user_data.wait.num; ++i)
3456 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3459 * We should wait for the threads either to abort, or to leave the
3460 * domain. We can't do the latter, so we wait with a timeout.
3462 wait_for_tids (&user_data.wait, 100);
3465 /* Update remaining time */
3466 timeout -= mono_msec_ticks () - start_time;
3467 start_time = mono_msec_ticks ();
3469 if (orig_timeout != -1 && timeout < 0)
3472 while (user_data.wait.num > 0);
3474 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3480 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3482 MonoInternalThread *thread = (MonoInternalThread*)value;
3483 MonoDomain *domain = (MonoDomain*)user_data;
3486 /* No locking needed here */
3487 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3489 if (thread->cached_culture_info) {
3490 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3491 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3492 if (obj && obj->vtable->domain == domain)
3493 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3499 * mono_threads_clear_cached_culture:
3501 * Clear the cached_current_culture from all threads if it is in the
3505 mono_threads_clear_cached_culture (MonoDomain *domain)
3507 mono_threads_lock ();
3508 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3509 mono_threads_unlock ();
3513 * mono_thread_get_undeniable_exception:
3515 * Return an exception which needs to be raised when leaving a catch clause.
3516 * This is used for undeniable exception propagation.
3519 mono_thread_get_undeniable_exception (void)
3521 MonoInternalThread *thread = mono_thread_internal_current ();
3523 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3525 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3526 * exception if the thread no longer references a dying appdomain.
3528 thread->abort_exc->trace_ips = NULL;
3529 thread->abort_exc->stack_trace = NULL;
3530 return thread->abort_exc;
3536 #if MONO_SMALL_CONFIG
3537 #define NUM_STATIC_DATA_IDX 4
3538 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3542 #define NUM_STATIC_DATA_IDX 8
3543 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3544 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3548 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3551 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3554 gpointer *static_data = addr;
3555 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3558 if (!static_data [i])
3560 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3561 ptr = static_data [i];
3562 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3563 uintptr_t bmap = static_reference_bitmaps [i][j];
3566 if ((bmap & 1) && *p) {
3567 mark_func (p, gc_data);
3577 * mono_alloc_static_data
3579 * Allocate memory blocks for storing threads or context static data
3582 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3584 guint idx = (offset >> 24) - 1;
3587 gpointer* static_data = *static_data_ptr;
3589 static void* tls_desc = NULL;
3590 if (mono_gc_user_markers_supported () && !tls_desc)
3591 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3592 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3593 *static_data_ptr = static_data;
3594 static_data [0] = static_data;
3597 for (i = 1; i <= idx; ++i) {
3598 if (static_data [i])
3600 if (mono_gc_user_markers_supported () && threadlocal)
3601 static_data [i] = g_malloc0 (static_data_size [i]);
3603 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3608 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3611 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3612 gpointer p = static_data [i];
3616 * At this point, the static data pointer array is still registered with the
3617 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3618 * data. Freeing the individual arrays without first nulling their slots
3619 * would make it possible for mark_tls_slots() to encounter a pointer to
3620 * such an already freed array. See bug #13813.
3622 static_data [i] = NULL;
3623 mono_memory_write_barrier ();
3624 if (mono_gc_user_markers_supported () && threadlocal)
3627 mono_gc_free_fixed (p);
3629 mono_gc_free_fixed (static_data);
3633 * mono_init_static_data_info
3635 * Initializes static data counters
3637 static void mono_init_static_data_info (StaticDataInfo *static_data)
3639 static_data->idx = 0;
3640 static_data->offset = 0;
3641 static_data->freelist = NULL;
3645 * mono_alloc_static_data_slot
3647 * Generates an offset for static data. static_data contains the counters
3648 * used to generate it.
3651 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3655 if (!static_data->idx && !static_data->offset) {
3657 * we use the first chunk of the first allocation also as
3658 * an array for the rest of the data
3660 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3662 static_data->offset += align - 1;
3663 static_data->offset &= ~(align - 1);
3664 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3665 static_data->idx ++;
3666 g_assert (size <= static_data_size [static_data->idx]);
3667 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3668 static_data->offset = 0;
3670 offset = static_data->offset | ((static_data->idx + 1) << 24);
3671 static_data->offset += size;
3676 * ensure thread static fields already allocated are valid for thread
3677 * This function is called when a thread is created or on thread attach.
3680 thread_adjust_static_data (MonoInternalThread *thread)
3684 mono_threads_lock ();
3685 if (thread_static_info.offset || thread_static_info.idx > 0) {
3686 /* get the current allocated size */
3687 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3688 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3690 mono_threads_unlock ();
3694 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3696 MonoInternalThread *thread = value;
3697 guint32 offset = GPOINTER_TO_UINT (user);
3699 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3702 static MonoThreadDomainTls*
3703 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3705 MonoThreadDomainTls* prev = NULL;
3706 MonoThreadDomainTls* tmp = static_data->freelist;
3708 if (tmp->size == size) {
3710 prev->next = tmp->next;
3712 static_data->freelist = tmp->next;
3721 #if SIZEOF_VOID_P == 4
3728 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3731 int idx = (offset >> 24) - 1;
3733 if (!static_reference_bitmaps [idx])
3734 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3735 rb = static_reference_bitmaps [idx];
3737 offset /= sizeof (gpointer);
3738 /* offset is now the bitmap offset */
3739 for (i = 0; i < numbits; ++i) {
3740 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3741 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (ONE_P << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3746 clear_reference_bitmap (guint32 offset, guint32 size)
3748 int idx = (offset >> 24) - 1;
3750 rb = static_reference_bitmaps [idx];
3752 offset /= sizeof (gpointer);
3753 size /= sizeof (gpointer);
3755 /* offset is now the bitmap offset */
3756 for (; offset < size; ++offset)
3757 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3761 * The offset for a special static variable is composed of three parts:
3762 * a bit that indicates the type of static data (0:thread, 1:context),
3763 * an index in the array of chunks of memory for the thread (thread->static_data)
3764 * and an offset in that chunk of mem. This allows allocating less memory in the
3769 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3772 if (static_type == SPECIAL_STATIC_THREAD) {
3773 MonoThreadDomainTls *item;
3774 mono_threads_lock ();
3775 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3776 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3778 offset = item->offset;
3781 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3783 update_tls_reference_bitmap (offset, bitmap, numbits);
3784 /* This can be called during startup */
3785 if (threads != NULL)
3786 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3787 mono_threads_unlock ();
3789 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3790 mono_contexts_lock ();
3791 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3792 mono_contexts_unlock ();
3793 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3799 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3801 /* The high bit means either thread (0) or static (1) data. */
3803 guint32 static_type = (offset & 0x80000000);
3806 offset &= 0x7fffffff;
3807 idx = (offset >> 24) - 1;
3809 if (static_type == 0) {
3810 return get_thread_static_data (thread, offset);
3812 /* Allocate static data block under demand, since we don't have a list
3815 MonoAppContext *context = mono_context_get ();
3816 if (!context->static_data || !context->static_data [idx]) {
3817 mono_contexts_lock ();
3818 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3819 mono_contexts_unlock ();
3821 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3826 mono_get_special_static_data (guint32 offset)
3828 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3837 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3839 MonoInternalThread *thread = value;
3840 TlsOffsetSize *data = user;
3841 int idx = (data->offset >> 24) - 1;
3844 if (!thread->static_data || !thread->static_data [idx])
3846 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3847 mono_gc_bzero_atomic (ptr, data->size);
3851 do_free_special_slot (guint32 offset, guint32 size)
3853 guint32 static_type = (offset & 0x80000000);
3854 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3855 if (static_type == 0) {
3857 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3858 data.offset = offset & 0x7fffffff;
3860 clear_reference_bitmap (data.offset, data.size);
3861 if (threads != NULL)
3862 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3863 item->offset = offset;
3866 if (!mono_runtime_is_shutting_down ()) {
3867 item->next = thread_static_info.freelist;
3868 thread_static_info.freelist = item;
3870 /* We could be called during shutdown after mono_thread_cleanup () is called */
3874 /* FIXME: free context static data as well */
3879 do_free_special (gpointer key, gpointer value, gpointer data)
3881 MonoClassField *field = key;
3882 guint32 offset = GPOINTER_TO_UINT (value);
3885 size = mono_type_size (field->type, &align);
3886 do_free_special_slot (offset, size);
3890 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3892 mono_threads_lock ();
3893 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3894 mono_threads_unlock ();
3898 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3900 mono_threads_lock ();
3901 do_free_special_slot (offset, size);
3902 mono_threads_unlock ();
3906 * allocates room in the thread local area for storing an instance of the struct type
3907 * the allocation is kept track of in domain->tlsrec_list.
3910 mono_thread_alloc_tls (MonoReflectionType *type)
3912 MonoDomain *domain = mono_domain_get ();
3914 MonoTlsDataRecord *tlsrec;
3917 gsize default_bitmap [4] = {0};
3918 uint32_t tls_offset;
3922 klass = mono_class_from_mono_type (type->type);
3923 /* TlsDatum is a struct, so we subtract the object header size offset */
3924 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3925 size = mono_type_size (type->type, &align);
3926 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3927 if (bitmap != default_bitmap)
3929 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3930 tlsrec->tls_offset = tls_offset;
3931 tlsrec->size = size;
3932 mono_domain_lock (domain);
3933 tlsrec->next = domain->tlsrec_list;
3934 domain->tlsrec_list = tlsrec;
3935 mono_domain_unlock (domain);
3940 destroy_tls (MonoDomain *domain, uint32_t tls_offset)
3942 MonoTlsDataRecord *prev = NULL;
3943 MonoTlsDataRecord *cur;
3946 mono_domain_lock (domain);
3947 cur = domain->tlsrec_list;
3949 if (cur->tls_offset == tls_offset) {
3951 prev->next = cur->next;
3953 domain->tlsrec_list = cur->next;
3961 mono_domain_unlock (domain);
3963 mono_special_static_data_free_slot (tls_offset, size);
3967 mono_thread_destroy_tls (uint32_t tls_offset)
3969 destroy_tls (mono_domain_get (), tls_offset);
3973 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
3976 mono_thread_destroy_domain_tls (MonoDomain *domain)
3978 while (domain->tlsrec_list)
3979 destroy_tls (domain, domain->tlsrec_list->tls_offset);
3982 static MonoClassField *local_slots = NULL;
3985 /* local tls data to get locals_slot from a thread */
3988 /* index in the locals_slot array */
3993 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3995 LocalSlotID *sid = user_data;
3996 MonoInternalThread *thread = (MonoInternalThread*)value;
3997 MonoArray *slots_array;
3999 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4000 * it is for the right domain, so we need to check if it is allocated an initialized
4001 * for the current thread.
4003 /*g_print ("handling thread %p\n", thread);*/
4004 if (!thread->static_data || !thread->static_data [sid->idx])
4006 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4007 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4009 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4013 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4021 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4023 g_warning ("local_slots field not found in Thread class");
4027 domain = mono_domain_get ();
4028 mono_domain_lock (domain);
4029 if (domain->special_static_fields)
4030 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4031 mono_domain_unlock (domain);
4034 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4035 sid.offset = GPOINTER_TO_UINT (addr);
4036 sid.offset &= 0x7fffffff;
4037 sid.idx = (sid.offset >> 24) - 1;
4038 mono_threads_lock ();
4039 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4040 mono_threads_unlock ();
4042 /* FIXME: clear the slot for MonoAppContexts, too */
4047 static void CALLBACK dummy_apc (ULONG_PTR param)
4053 * mono_thread_execute_interruption
4055 * Performs the operation that the requested thread state requires (abort,
4058 static MonoException*
4059 mono_thread_execute_interruption (MonoInternalThread *thread)
4061 LOCK_THREAD (thread);
4063 /* MonoThread::interruption_requested can only be changed with atomics */
4064 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4065 /* this will consume pending APC calls */
4067 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4069 InterlockedDecrement (&thread_interruption_requested);
4070 /* Clear the interrupted flag of the thread so it can wait again */
4071 mono_thread_info_clear_interruption ();
4074 if ((thread->state & ThreadState_AbortRequested) != 0) {
4075 UNLOCK_THREAD (thread);
4076 if (thread->abort_exc == NULL) {
4078 * This might be racy, but it has to be called outside the lock
4079 * since it calls managed code.
4081 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4083 return thread->abort_exc;
4085 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4086 self_suspend_internal (thread);
4089 else if ((thread->state & ThreadState_StopRequested) != 0) {
4090 /* FIXME: do this through the JIT? */
4092 UNLOCK_THREAD (thread);
4094 mono_thread_exit ();
4096 } else if (thread->pending_exception) {
4099 exc = thread->pending_exception;
4100 thread->pending_exception = NULL;
4102 UNLOCK_THREAD (thread);
4104 } else if (thread->thread_interrupt_requested) {
4106 thread->thread_interrupt_requested = FALSE;
4107 UNLOCK_THREAD (thread);
4109 return(mono_get_exception_thread_interrupted ());
4112 UNLOCK_THREAD (thread);
4118 * mono_thread_request_interruption
4120 * A signal handler can call this method to request the interruption of a
4121 * thread. The result of the interruption will depend on the current state of
4122 * the thread. If the result is an exception that needs to be throw, it is
4123 * provided as return value.
4126 mono_thread_request_interruption (gboolean running_managed)
4128 MonoInternalThread *thread = mono_thread_internal_current ();
4130 /* The thread may already be stopping */
4135 if (thread->interrupt_on_stop &&
4136 thread->state & ThreadState_StopRequested &&
4137 thread->state & ThreadState_Background)
4141 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4143 InterlockedIncrement (&thread_interruption_requested);
4145 if (!running_managed || is_running_protected_wrapper ()) {
4146 /* Can't stop while in unmanaged code. Increase the global interruption
4147 request count. When exiting the unmanaged method the count will be
4148 checked and the thread will be interrupted. */
4150 if (mono_thread_notify_pending_exc_fn && !running_managed)
4151 /* The JIT will notify the thread about the interruption */
4152 /* This shouldn't take any locks */
4153 mono_thread_notify_pending_exc_fn (NULL);
4155 /* this will awake the thread if it is in WaitForSingleObject
4157 /* Our implementation of this function ignores the func argument */
4159 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4161 mono_thread_info_self_interrupt ();
4166 return mono_thread_execute_interruption (thread);
4170 /*This function should be called by a thread after it has exited all of
4171 * its handle blocks at interruption time.*/
4173 mono_thread_resume_interruption (void)
4175 MonoInternalThread *thread = mono_thread_internal_current ();
4176 gboolean still_aborting;
4178 /* The thread may already be stopping */
4182 LOCK_THREAD (thread);
4183 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4184 UNLOCK_THREAD (thread);
4186 /*This can happen if the protected block called Thread::ResetAbort*/
4187 if (!still_aborting)
4190 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4192 InterlockedIncrement (&thread_interruption_requested);
4194 mono_thread_info_self_interrupt ();
4196 return mono_thread_execute_interruption (thread);
4199 gboolean mono_thread_interruption_requested ()
4201 if (thread_interruption_requested) {
4202 MonoInternalThread *thread = mono_thread_internal_current ();
4203 /* The thread may already be stopping */
4205 return (thread->interruption_requested);
4210 static MonoException*
4211 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4213 MonoInternalThread *thread = mono_thread_internal_current ();
4215 /* The thread may already be stopping */
4219 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4220 MonoException* exc = mono_thread_execute_interruption (thread);
4228 * Performs the interruption of the current thread, if one has been requested,
4229 * and the thread is not running a protected wrapper.
4230 * Return the exception which needs to be thrown, if any.
4233 mono_thread_interruption_checkpoint (void)
4235 return mono_thread_interruption_checkpoint_request (FALSE);
4239 * Performs the interruption of the current thread, if one has been requested.
4240 * Return the exception which needs to be thrown, if any.
4243 mono_thread_force_interruption_checkpoint_noraise (void)
4245 return mono_thread_interruption_checkpoint_request (TRUE);
4249 * Performs the interruption of the current thread, if one has been requested.
4250 * Throw the exception which needs to be thrown, if any.
4253 mono_thread_force_interruption_checkpoint (void)
4257 ex = mono_thread_interruption_checkpoint_request (TRUE);
4259 mono_raise_exception (ex);
4263 * mono_thread_get_and_clear_pending_exception:
4265 * Return any pending exceptions for the current thread and clear it as a side effect.
4268 mono_thread_get_and_clear_pending_exception (void)
4270 MonoInternalThread *thread = mono_thread_internal_current ();
4272 /* The thread may already be stopping */
4276 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4277 return mono_thread_execute_interruption (thread);
4280 if (thread->pending_exception) {
4281 MonoException *exc = thread->pending_exception;
4283 thread->pending_exception = NULL;
4291 * mono_set_pending_exception:
4293 * Set the pending exception of the current thread to EXC.
4294 * The exception will be thrown when execution returns to managed code.
4297 mono_set_pending_exception (MonoException *exc)
4299 MonoInternalThread *thread = mono_thread_internal_current ();
4301 /* The thread may already be stopping */
4305 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4307 mono_thread_request_interruption (FALSE);
4311 * mono_thread_interruption_request_flag:
4313 * Returns the address of a flag that will be non-zero if an interruption has
4314 * been requested for a thread. The thread to interrupt may not be the current
4315 * thread, so an additional call to mono_thread_interruption_requested() or
4316 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4319 gint32* mono_thread_interruption_request_flag ()
4321 return &thread_interruption_requested;
4325 mono_thread_init_apartment_state (void)
4328 MonoInternalThread* thread = mono_thread_internal_current ();
4330 /* Positive return value indicates success, either
4331 * S_OK if this is first CoInitialize call, or
4332 * S_FALSE if CoInitialize already called, but with same
4333 * threading model. A negative value indicates failure,
4334 * probably due to trying to change the threading model.
4336 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4337 ? COINIT_APARTMENTTHREADED
4338 : COINIT_MULTITHREADED) < 0) {
4339 thread->apartment_state = ThreadApartmentState_Unknown;
4345 mono_thread_cleanup_apartment_state (void)
4348 MonoInternalThread* thread = mono_thread_internal_current ();
4350 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4357 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4359 LOCK_THREAD (thread);
4360 thread->state |= state;
4361 UNLOCK_THREAD (thread);
4365 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4367 LOCK_THREAD (thread);
4368 thread->state &= ~state;
4369 UNLOCK_THREAD (thread);
4373 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4375 gboolean ret = FALSE;
4377 LOCK_THREAD (thread);
4379 if ((thread->state & test) != 0) {
4383 UNLOCK_THREAD (thread);
4388 //static MonoClassField *execution_context_field;
4391 get_execution_context_addr (void)
4393 MonoDomain *domain = mono_domain_get ();
4394 guint32 offset = domain->execution_context_field_offset;
4397 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4400 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4402 mono_domain_lock (domain);
4403 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4404 mono_domain_unlock (domain);
4407 domain->execution_context_field_offset = offset;
4410 return (MonoObject**) mono_get_special_static_data (offset);
4414 mono_thread_get_execution_context (void)
4416 return *get_execution_context_addr ();
4420 mono_thread_set_execution_context (MonoObject *ec)
4422 *get_execution_context_addr () = ec;
4425 static gboolean has_tls_get = FALSE;
4428 mono_runtime_set_has_tls_get (gboolean val)
4434 mono_runtime_has_tls_get (void)
4440 self_interrupt_thread (void *_unused)
4442 MonoThreadInfo *info = mono_thread_info_current ();
4443 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4444 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4445 mono_raise_exception_with_context (exc, &info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX].ctx); /* FIXME using thread_saved_state [ASYNC_SUSPEND_STATE_INDEX] can race with another suspend coming in. */
4446 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4450 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4454 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4458 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4460 MonoJitInfo **dest = data;
4466 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4468 MonoJitInfo *ji = NULL;
4471 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4476 MonoInternalThread *thread;
4477 gboolean install_async_abort;
4478 gpointer interrupt_handle;
4481 static SuspendThreadResult
4482 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4484 AbortThreadData *data = ud;
4485 MonoInternalThread *thread = data->thread;
4486 MonoJitInfo *ji = NULL;
4487 gboolean protected_wrapper;
4488 gboolean running_managed;
4490 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4491 return MonoResumeThread;
4493 /*someone is already interrupting it*/
4494 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4495 return MonoResumeThread;
4497 InterlockedIncrement (&thread_interruption_requested);
4499 ji = mono_thread_info_get_last_managed (info);
4500 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4501 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4503 if (!protected_wrapper && running_managed) {
4504 /*We are in managed code*/
4505 /*Set the thread to call */
4506 if (data->install_async_abort)
4507 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4508 return MonoResumeThread;
4510 if (mono_thread_notify_pending_exc_fn)
4511 /* The JIT will notify the thread about the interruption */
4512 mono_thread_notify_pending_exc_fn (info);
4515 * This will cause waits to be broken.
4516 * It will also prevent the thread from entering a wait, so if the thread returns
4517 * from the wait before it receives the abort signal, it will just spin in the wait
4518 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4521 data->interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4522 return MonoResumeThread;
4527 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4529 AbortThreadData data = { 0 };
4530 data.thread = thread;
4531 data.install_async_abort = install_async_abort;
4534 FIXME this is insanely broken, it doesn't cause interruption to happen
4535 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4537 if (thread == mono_thread_internal_current ()) {
4538 /* Do it synchronously */
4539 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4541 mono_raise_exception (exc);
4542 mono_thread_info_interrupt (thread->handle);
4546 mono_thread_info_safe_suspend_and_run ((MonoNativeThreadId)(gsize)thread->tid, TRUE, abort_thread_critical, &data);
4547 if (data.interrupt_handle)
4548 mono_thread_info_finish_interrupt (data.interrupt_handle);
4549 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4553 MonoInternalThread *thread;
4555 gpointer interrupt_handle;
4556 } SuspendThreadData;
4558 static SuspendThreadResult
4559 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4561 SuspendThreadData *data = ud;
4562 MonoInternalThread *thread = data->thread;
4563 MonoJitInfo *ji = NULL;
4564 gboolean protected_wrapper;
4565 gboolean running_managed;
4567 ji = mono_thread_info_get_last_managed (info);
4568 protected_wrapper = ji && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4569 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4571 if (running_managed && !protected_wrapper) {
4572 thread->state &= ~ThreadState_SuspendRequested;
4573 thread->state |= ThreadState_Suspended;
4574 return KeepSuspended;
4576 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4577 InterlockedIncrement (&thread_interruption_requested);
4578 if (data->interrupt)
4579 data->interrupt_handle = mono_thread_info_prepare_interrupt (thread->handle);
4581 if (mono_thread_notify_pending_exc_fn && !running_managed)
4582 /* The JIT will notify the thread about the interruption */
4583 mono_thread_notify_pending_exc_fn (info);
4584 return MonoResumeThread;
4589 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4591 LOCK_THREAD (thread);
4592 if (thread == mono_thread_internal_current ()) {
4593 mono_thread_info_begin_self_suspend ();
4594 //XXX replace this with better named functions
4595 thread->state &= ~ThreadState_SuspendRequested;
4596 thread->state |= ThreadState_Suspended;
4597 UNLOCK_THREAD (thread);
4598 mono_thread_info_end_self_suspend ();
4600 SuspendThreadData data = { 0 };
4601 data.thread = thread;
4602 data.interrupt = interrupt;
4604 mono_thread_info_safe_suspend_and_run ((MonoNativeThreadId)(gsize)thread->tid, interrupt, suspend_thread_critical, &data);
4605 if (data.interrupt_handle)
4606 mono_thread_info_finish_interrupt (data.interrupt_handle);
4607 UNLOCK_THREAD (thread);
4611 /*This is called with @thread synch_cs held and it must release it*/
4613 self_suspend_internal (MonoInternalThread *thread)
4615 mono_thread_info_begin_self_suspend ();
4616 thread->state &= ~ThreadState_SuspendRequested;
4617 thread->state |= ThreadState_Suspended;
4618 UNLOCK_THREAD (thread);
4619 mono_thread_info_end_self_suspend ();
4622 /*This is called with @thread synch_cs held and it must release it*/
4624 resume_thread_internal (MonoInternalThread *thread)
4626 UNLOCK_THREAD (thread);
4627 /* Awake the thread */
4628 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4630 LOCK_THREAD (thread);
4631 thread->state &= ~ThreadState_Suspended;
4632 UNLOCK_THREAD (thread);
4638 * mono_thread_is_foreign:
4639 * @thread: the thread to query
4641 * This function allows one to determine if a thread was created by the mono runtime and has
4642 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4644 * Returns: true if @thread was not created by the runtime.
4647 mono_thread_is_foreign (MonoThread *thread)
4649 MonoThreadInfo *info = thread->internal_thread->thread_info;
4650 return info->runtime_thread == FALSE;
4654 * mono_add_joinable_thread:
4656 * Add TID to the list of joinable threads.
4657 * LOCKING: Acquires the threads lock.
4660 mono_threads_add_joinable_thread (gpointer tid)
4664 * We cannot detach from threads because it causes problems like
4665 * 2fd16f60/r114307. So we collect them and join them when
4666 * we have time (in he finalizer thread).
4668 joinable_threads_lock ();
4669 if (!joinable_threads)
4670 joinable_threads = g_hash_table_new (NULL, NULL);
4671 g_hash_table_insert (joinable_threads, tid, tid);
4672 joinable_thread_count ++;
4673 joinable_threads_unlock ();
4675 mono_gc_finalize_notify ();
4680 * mono_threads_join_threads:
4682 * Join all joinable threads. This is called from the finalizer thread.
4683 * LOCKING: Acquires the threads lock.
4686 mono_threads_join_threads (void)
4689 GHashTableIter iter;
4696 if (!joinable_thread_count)
4700 joinable_threads_lock ();
4702 if (g_hash_table_size (joinable_threads)) {
4703 g_hash_table_iter_init (&iter, joinable_threads);
4704 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4705 thread = (pthread_t)tid;
4706 g_hash_table_remove (joinable_threads, key);
4707 joinable_thread_count --;
4710 joinable_threads_unlock ();
4712 if (thread != pthread_self ())
4713 /* This shouldn't block */
4714 pthread_join (thread, NULL);
4725 * Wait for thread TID to exit.
4726 * LOCKING: Acquires the threads lock.
4729 mono_thread_join (gpointer tid)
4733 gboolean found = FALSE;
4735 joinable_threads_lock ();
4736 if (!joinable_threads)
4737 joinable_threads = g_hash_table_new (NULL, NULL);
4738 if (g_hash_table_lookup (joinable_threads, tid)) {
4739 g_hash_table_remove (joinable_threads, tid);
4740 joinable_thread_count --;
4743 joinable_threads_unlock ();
4746 thread = (pthread_t)tid;
4747 pthread_join (thread, NULL);