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/threads-types.h>
24 #include <mono/metadata/exception.h>
25 #include <mono/metadata/environment.h>
26 #include <mono/metadata/monitor.h>
27 #include <mono/metadata/gc-internals.h>
28 #include <mono/metadata/marshal.h>
29 #include <mono/metadata/runtime.h>
30 #include <mono/io-layer/io-layer.h>
31 #include <mono/metadata/object-internals.h>
32 #include <mono/metadata/mono-debug-debugger.h>
33 #include <mono/utils/monobitset.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-internals.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 _StaticDataFreeList StaticDataFreeList;
108 struct _StaticDataFreeList {
109 StaticDataFreeList *next;
117 StaticDataFreeList *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 the 'joinable_threads' hash table */
134 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
135 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
136 static mono_mutex_t joinable_threads_mutex;
138 /* Holds current status of static data heap */
139 static StaticDataInfo thread_static_info;
140 static StaticDataInfo context_static_info;
142 /* The hash of existing threads (key is thread ID, value is
143 * MonoInternalThread*) that need joining before exit
145 static MonoGHashTable *threads=NULL;
147 /* List of app context GC handles.
148 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
150 static GHashTable *contexts = 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 /* The TLS key that holds the MonoObject assigned to each thread */
160 static MonoNativeTlsKey current_object_key;
163 /* Protected by the threads lock */
164 static GHashTable *joinable_threads;
165 static int joinable_thread_count;
167 #ifdef MONO_HAVE_FAST_TLS
168 /* we need to use both the Tls* functions and __thread because
169 * the gc needs to see all the threads
171 MONO_FAST_TLS_DECLARE(tls_current_object);
172 #define SET_CURRENT_OBJECT(x) do { \
173 MONO_FAST_TLS_SET (tls_current_object, x); \
174 mono_native_tls_set_value (current_object_key, x); \
176 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
178 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
179 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
182 /* function called at thread start */
183 static MonoThreadStartCB mono_thread_start_cb = NULL;
185 /* function called at thread attach */
186 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
188 /* function called at thread cleanup */
189 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
191 /* function called to notify the runtime about a pending exception on the current thread */
192 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
194 /* The default stack size for each thread */
195 static guint32 default_stacksize = 0;
196 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
198 static void thread_adjust_static_data (MonoInternalThread *thread);
199 static void context_adjust_static_data (MonoAppContext *ctx);
200 static void mono_free_static_data (gpointer* static_data);
201 static void mono_init_static_data_info (StaticDataInfo *static_data);
202 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
203 static gboolean mono_thread_resume (MonoInternalThread* thread);
204 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
205 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
206 static void self_suspend_internal (MonoInternalThread *thread);
208 static MonoException* mono_thread_execute_interruption ();
209 static void ref_stack_destroy (gpointer rs);
211 /* Spin lock for InterlockedXXX 64 bit functions */
212 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
213 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
214 static mono_mutex_t interlocked_mutex;
216 /* global count of thread interruptions requested */
217 static gint32 thread_interruption_requested = 0;
219 /* Event signaled when a thread changes its background mode */
220 static HANDLE background_change_event;
222 static gboolean shutting_down = FALSE;
224 static gint32 managed_thread_id_counter = 0;
227 mono_threads_lock (void)
230 mono_locks_os_acquire (&threads_mutex, ThreadsLock);
231 MONO_FINISH_TRY_BLOCKING;
235 mono_threads_unlock (void)
237 mono_locks_os_release (&threads_mutex, ThreadsLock);
242 get_next_managed_thread_id (void)
244 return InterlockedIncrement (&managed_thread_id_counter);
248 mono_thread_get_tls_key (void)
250 return current_object_key;
254 mono_thread_get_tls_offset (void)
257 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
261 static inline MonoNativeThreadId
262 thread_get_tid (MonoInternalThread *thread)
264 /* We store the tid as a guint64 to keep the object layout constant between platforms */
265 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
268 /* handle_store() and handle_remove() manage the array of threads that
269 * still need to be waited for when the main thread exits.
271 * If handle_store() returns FALSE the thread must not be started
272 * because Mono is shutting down.
274 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
276 mono_threads_lock ();
278 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
280 if (threads_starting_up)
281 mono_g_hash_table_remove (threads_starting_up, thread);
283 if (shutting_down && !force_attach) {
284 mono_threads_unlock ();
289 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
290 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
293 /* We don't need to duplicate thread->handle, because it is
294 * only closed when the thread object is finalized by the GC.
296 g_assert (thread->internal_thread);
297 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
298 thread->internal_thread);
300 mono_threads_unlock ();
305 static gboolean handle_remove(MonoInternalThread *thread)
308 gsize tid = thread->tid;
310 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
312 mono_threads_lock ();
315 /* We have to check whether the thread object for the
316 * tid is still the same in the table because the
317 * thread might have been destroyed and the tid reused
318 * in the meantime, in which case the tid would be in
319 * the table, but with another thread object.
321 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
322 mono_g_hash_table_remove (threads, (gpointer)tid);
331 mono_threads_unlock ();
333 /* Don't close the handle here, wait for the object finalizer
334 * to do it. Otherwise, the following race condition applies:
336 * 1) Thread exits (and handle_remove() closes the handle)
338 * 2) Some other handle is reassigned the same slot
340 * 3) Another thread tries to join the first thread, and
341 * blocks waiting for the reassigned handle to be signalled
342 * (which might never happen). This is possible, because the
343 * thread calling Join() still has a reference to the first
349 static void ensure_synch_cs_set (MonoInternalThread *thread)
351 MonoCoopMutex *synch_cs;
353 if (thread->synch_cs != NULL) {
357 synch_cs = g_new0 (MonoCoopMutex, 1);
358 mono_coop_mutex_init_recursive (synch_cs);
360 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
361 synch_cs, NULL) != NULL) {
362 /* Another thread must have installed this CS */
363 mono_coop_mutex_destroy (synch_cs);
369 lock_thread (MonoInternalThread *thread)
371 if (!thread->synch_cs)
372 ensure_synch_cs_set (thread);
374 g_assert (thread->synch_cs);
376 mono_coop_mutex_lock (thread->synch_cs);
380 unlock_thread (MonoInternalThread *thread)
382 mono_coop_mutex_unlock (thread->synch_cs);
386 * NOTE: this function can be called also for threads different from the current one:
387 * make sure no code called from it will ever assume it is run on the thread that is
388 * getting cleaned up.
390 static void thread_cleanup (MonoInternalThread *thread)
392 g_assert (thread != NULL);
394 if (thread->abort_state_handle) {
395 mono_gchandle_free (thread->abort_state_handle);
396 thread->abort_state_handle = 0;
398 thread->abort_exc = NULL;
399 thread->current_appcontext = NULL;
402 * This is necessary because otherwise we might have
403 * cross-domain references which will not get cleaned up when
404 * the target domain is unloaded.
406 if (thread->cached_culture_info) {
408 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
409 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
413 * thread->synch_cs can be NULL if this was called after
414 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
415 * This can happen only during shutdown.
416 * The shutting_down flag is not always set, so we can't assert on it.
418 if (thread->synch_cs)
419 LOCK_THREAD (thread);
421 thread->state |= ThreadState_Stopped;
422 thread->state &= ~ThreadState_Background;
424 if (thread->synch_cs)
425 UNLOCK_THREAD (thread);
428 An interruption request has leaked to cleanup. Adjust the global counter.
430 This can happen is the abort source thread finds the abortee (this) thread
431 in unmanaged code. If this thread never trips back to managed code or check
432 the local flag it will be left set and positively unbalance the global counter.
434 Leaving the counter unbalanced will cause a performance degradation since all threads
435 will now keep checking their local flags all the time.
437 if (InterlockedExchange (&thread->interruption_requested, 0))
438 InterlockedDecrement (&thread_interruption_requested);
440 /* if the thread is not in the hash it has been removed already */
441 if (!handle_remove (thread)) {
442 if (thread == mono_thread_internal_current ()) {
443 mono_domain_unset ();
444 mono_memory_barrier ();
446 /* This needs to be called even if handle_remove () fails */
447 if (mono_thread_cleanup_fn)
448 mono_thread_cleanup_fn (thread_get_tid (thread));
451 mono_release_type_locks (thread);
453 mono_profiler_thread_end (thread->tid);
455 if (thread == mono_thread_internal_current ()) {
457 * This will signal async signal handlers that the thread has exited.
458 * The profiler callback needs this to be set, so it cannot be done earlier.
460 mono_domain_unset ();
461 mono_memory_barrier ();
464 if (thread == mono_thread_internal_current ())
465 mono_thread_pop_appdomain_ref ();
467 thread->cached_culture_info = NULL;
469 mono_free_static_data (thread->static_data);
470 thread->static_data = NULL;
471 ref_stack_destroy (thread->appdomain_refs);
472 thread->appdomain_refs = NULL;
474 if (mono_thread_cleanup_fn)
475 mono_thread_cleanup_fn (thread_get_tid (thread));
477 if (mono_gc_is_moving ()) {
478 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
479 thread->thread_pinning_ref = NULL;
484 * A special static data offset (guint32) consists of 3 parts:
486 * [0] 6-bit index into the array of chunks.
487 * [6] 25-bit offset into the array.
488 * [31] Bit indicating thread or context static.
493 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
504 } SpecialStaticOffset;
506 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
507 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
509 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
510 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
511 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
512 (((SpecialStaticOffset *) &(x))->fields.f)
515 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
517 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
519 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
520 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
522 return ((char *) thread->static_data [idx]) + off;
526 get_context_static_data (MonoAppContext *ctx, guint32 offset)
528 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
530 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
531 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
533 return ((char *) ctx->static_data [idx]) + off;
537 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
539 static MonoClassField *current_thread_field = NULL;
543 if (!current_thread_field) {
544 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
545 g_assert (current_thread_field);
548 mono_class_vtable (domain, mono_defaults.thread_class);
549 mono_domain_lock (domain);
550 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
551 mono_domain_unlock (domain);
554 return get_thread_static_data (thread, offset);
558 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
560 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
562 g_assert (current->obj.vtable->domain == domain);
564 g_assert (!*current_thread_ptr);
565 *current_thread_ptr = current;
569 create_thread_object (MonoDomain *domain)
571 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
572 return (MonoThread*)mono_gc_alloc_mature (vt);
576 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
578 MonoThread *thread = create_thread_object (domain);
579 MONO_OBJECT_SETREF (thread, internal_thread, internal);
583 static MonoInternalThread*
584 create_internal_thread (void)
586 MonoInternalThread *thread;
589 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
590 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
592 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
593 mono_coop_mutex_init_recursive (thread->synch_cs);
595 thread->apartment_state = ThreadApartmentState_Unknown;
596 thread->managed_id = get_next_managed_thread_id ();
597 if (mono_gc_is_moving ()) {
598 thread->thread_pinning_ref = thread;
599 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
606 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
608 MonoDomain *domain = mono_get_root_domain ();
610 if (!candidate || candidate->obj.vtable->domain != domain)
611 candidate = new_thread_with_internal (domain, thread);
612 set_current_thread_for_domain (domain, thread, candidate);
613 g_assert (!thread->root_domain_thread);
614 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
617 static guint32 WINAPI start_wrapper_internal(void *data)
619 MonoThreadInfo *info;
620 StartInfo *start_info = (StartInfo *)data;
621 guint32 (*start_func)(void *);
625 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
628 MonoInternalThread *internal = start_info->obj->internal_thread;
629 MonoObject *start_delegate = start_info->delegate;
630 MonoDomain *domain = start_info->obj->obj.vtable->domain;
632 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
634 /* We can be sure start_info->obj->tid and
635 * start_info->obj->handle have been set, because the thread
636 * was created suspended, and these values were set before the
640 info = mono_thread_info_current ();
642 internal->thread_info = info;
643 internal->small_id = info->small_id;
647 SET_CURRENT_OBJECT (internal);
649 /* Every thread references the appdomain which created it */
650 mono_thread_push_appdomain_ref (domain);
652 if (!mono_domain_set (domain, FALSE)) {
653 /* No point in raising an appdomain_unloaded exception here */
654 /* FIXME: Cleanup here */
655 mono_thread_pop_appdomain_ref ();
659 start_func = start_info->func;
660 start_arg = start_info->obj->start_obj;
662 start_arg = start_info->start_arg;
664 /* We have to do this here because mono_thread_new_init()
665 requires that root_domain_thread is set up. */
666 thread_adjust_static_data (internal);
667 init_root_domain_thread (internal, start_info->obj);
669 /* This MUST be called before any managed code can be
670 * executed, as it calls the callback function that (for the
671 * jit) sets the lmf marker.
673 mono_thread_new_init (tid, &tid, start_func);
674 internal->stack_ptr = &tid;
675 if (domain != mono_get_root_domain ())
676 set_current_thread_for_domain (domain, internal, start_info->obj);
678 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
680 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
682 /* On 2.0 profile (and higher), set explicitly since state might have been
684 if (internal->apartment_state == ThreadApartmentState_Unknown)
685 internal->apartment_state = ThreadApartmentState_MTA;
687 mono_thread_init_apartment_state ();
689 if(internal->start_notify!=NULL) {
690 /* Let the thread that called Start() know we're
693 ReleaseSemaphore (internal->start_notify, 1, NULL);
697 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
701 * Call this after calling start_notify, since the profiler callback might want
702 * to lock the thread, and the lock is held by thread_start () which waits for
705 mono_profiler_thread_start (tid);
707 /* if the name was set before starting, we didn't invoke the profiler callback */
708 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
709 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
710 mono_profiler_thread_name (internal->tid, tname);
713 /* start_func is set only for unmanaged start functions */
715 start_func (start_arg);
718 g_assert (start_delegate != NULL);
719 args [0] = start_arg;
720 /* we may want to handle the exception here. See comment below on unhandled exceptions */
721 mono_runtime_delegate_invoke (start_delegate, args, NULL);
724 /* If the thread calls ExitThread at all, this remaining code
725 * will not be executed, but the main thread will eventually
726 * call thread_cleanup() on this thread's behalf.
729 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
731 /* Do any cleanup needed for apartment state. This
732 * cannot be done in thread_cleanup since thread_cleanup could be
733 * called for a thread other than the current thread.
734 * mono_thread_cleanup_apartment_state cleans up apartment
735 * for the current thead */
736 mono_thread_cleanup_apartment_state ();
738 thread_cleanup (internal);
742 /* Remove the reference to the thread object in the TLS data,
743 * so the thread object can be finalized. This won't be
744 * reached if the thread threw an uncaught exception, so those
745 * thread handles will stay referenced :-( (This is due to
746 * missing support for scanning thread-specific data in the
747 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
750 SET_CURRENT_OBJECT (NULL);
755 static guint32 WINAPI start_wrapper(void *data)
759 /* Avoid scanning the frames above this frame during a GC */
760 mono_gc_set_stack_end ((void*)&dummy);
762 return start_wrapper_internal (data);
768 * Common thread creation code.
769 * LOCKING: Acquires the threads lock.
772 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
773 gboolean throw_on_failure)
775 HANDLE thread_handle;
776 MonoNativeThreadId tid;
777 guint32 create_flags;
780 * Join joinable threads to prevent running out of threads since the finalizer
781 * thread might be blocked/backlogged.
783 mono_threads_join_threads ();
785 mono_threads_lock ();
788 mono_threads_unlock ();
791 if (threads_starting_up == NULL) {
792 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
793 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
795 mono_g_hash_table_insert (threads_starting_up, thread, thread);
796 mono_threads_unlock ();
798 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
799 if (!internal->start_notify) {
800 mono_threads_lock ();
801 mono_g_hash_table_remove (threads_starting_up, thread);
802 mono_threads_unlock ();
803 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
809 stack_size = default_stacksize_for_thread (internal);
811 /* Create suspended, so we can do some housekeeping before the thread
814 create_flags = CREATE_SUSPENDED;
816 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
817 stack_size, create_flags, &tid);
819 if (thread_handle == NULL) {
820 /* The thread couldn't be created, so throw an exception */
821 mono_threads_lock ();
822 mono_g_hash_table_remove (threads_starting_up, thread);
823 mono_threads_unlock ();
825 if (throw_on_failure)
826 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
828 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
831 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
833 internal->handle = thread_handle;
834 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
836 internal->threadpool_thread = threadpool_thread;
837 if (threadpool_thread)
838 mono_thread_set_state (internal, ThreadState_Background);
840 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
842 /* Only store the handle when the thread is about to be
843 * launched, to avoid the main thread deadlocking while trying
844 * to clean up a thread that will never be signalled.
846 if (!handle_store (thread, FALSE))
849 mono_thread_info_resume (tid);
851 if (internal->start_notify) {
853 * Wait for the thread to set up its TLS data etc, so
854 * theres no potential race condition if someone tries
855 * to look up the data believing the thread has
858 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
860 MONO_PREPARE_BLOCKING;
861 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
862 MONO_FINISH_BLOCKING;
864 CloseHandle (internal->start_notify);
865 internal->start_notify = NULL;
868 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
873 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
875 if (mono_thread_start_cb) {
876 mono_thread_start_cb (tid, stack_start, func);
880 void mono_threads_set_default_stacksize (guint32 stacksize)
882 default_stacksize = stacksize;
885 guint32 mono_threads_get_default_stacksize (void)
887 return default_stacksize;
891 * mono_thread_create_internal:
893 * ARG should not be a GC reference.
896 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
899 MonoInternalThread *internal;
900 StartInfo *start_info;
903 thread = create_thread_object (domain);
904 internal = create_internal_thread ();
905 MONO_OBJECT_SETREF (thread, internal_thread, internal);
907 start_info = g_new0 (StartInfo, 1);
908 start_info->func = func;
909 start_info->obj = thread;
910 start_info->start_arg = arg;
912 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
916 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
917 #ifndef MONO_CROSS_COMPILE
918 if (mono_check_corlib_version () == NULL)
919 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
926 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
928 mono_thread_create_internal (domain, func, arg, FALSE, 0);
932 mono_thread_attach (MonoDomain *domain)
934 return mono_thread_attach_full (domain, FALSE);
938 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
940 MonoThreadInfo *info;
941 MonoInternalThread *thread;
942 MonoThread *current_thread;
943 HANDLE thread_handle;
944 MonoNativeThreadId tid;
946 if ((thread = mono_thread_internal_current ())) {
947 if (domain != mono_domain_get ())
948 mono_domain_set (domain, TRUE);
949 /* Already attached */
950 return mono_thread_current ();
953 if (!mono_gc_register_thread (&domain)) {
954 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.", mono_native_thread_id_get ());
957 thread = create_internal_thread ();
959 thread_handle = mono_thread_info_open_handle ();
960 g_assert (thread_handle);
962 tid=mono_native_thread_id_get ();
964 thread->handle = thread_handle;
965 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
966 thread->stack_ptr = &tid;
968 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
970 info = mono_thread_info_current ();
972 thread->thread_info = info;
973 thread->small_id = info->small_id;
975 current_thread = new_thread_with_internal (domain, thread);
977 if (!handle_store (current_thread, force_attach)) {
978 /* Mono is shutting down, so just wait for the end */
980 mono_thread_info_sleep (10000, NULL);
983 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
985 SET_CURRENT_OBJECT (thread);
986 mono_domain_set (domain, TRUE);
988 thread_adjust_static_data (thread);
990 init_root_domain_thread (thread, current_thread);
991 if (domain != mono_get_root_domain ())
992 set_current_thread_for_domain (domain, thread, current_thread);
995 if (mono_thread_attach_cb) {
999 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1002 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1004 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1007 // FIXME: Need a separate callback
1008 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1010 return current_thread;
1014 mono_thread_detach_internal (MonoInternalThread *thread)
1016 g_return_if_fail (thread != NULL);
1018 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1020 thread_cleanup (thread);
1022 SET_CURRENT_OBJECT (NULL);
1023 mono_domain_unset ();
1025 /* Don't need to CloseHandle this thread, even though we took a
1026 * reference in mono_thread_attach (), because the GC will do it
1027 * when the Thread object is finalised.
1032 mono_thread_detach (MonoThread *thread)
1035 mono_thread_detach_internal (thread->internal_thread);
1039 * mono_thread_detach_if_exiting:
1041 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1042 * This should be used at the end of embedding code which calls into managed code, and which
1043 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1046 mono_thread_detach_if_exiting (void)
1048 if (mono_thread_info_is_exiting ()) {
1049 MonoInternalThread *thread;
1051 thread = mono_thread_internal_current ();
1053 mono_thread_detach_internal (thread);
1054 mono_thread_info_detach ();
1062 MonoInternalThread *thread = mono_thread_internal_current ();
1064 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1066 thread_cleanup (thread);
1067 SET_CURRENT_OBJECT (NULL);
1068 mono_domain_unset ();
1070 /* we could add a callback here for embedders to use. */
1071 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1072 exit (mono_environment_exitcode_get ());
1073 mono_thread_info_exit ();
1077 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1079 MonoInternalThread *internal = create_internal_thread ();
1081 internal->state = ThreadState_Unstarted;
1083 InterlockedCompareExchangePointer ((gpointer)&this_obj->internal_thread, internal, NULL);
1087 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1090 StartInfo *start_info;
1091 MonoInternalThread *internal;
1094 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1096 if (!this_obj->internal_thread)
1097 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1098 internal = this_obj->internal_thread;
1100 LOCK_THREAD (internal);
1102 if ((internal->state & ThreadState_Unstarted) == 0) {
1103 UNLOCK_THREAD (internal);
1104 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1108 if ((internal->state & ThreadState_Aborted) != 0) {
1109 UNLOCK_THREAD (internal);
1112 /* This is freed in start_wrapper */
1113 start_info = g_new0 (StartInfo, 1);
1114 start_info->func = NULL;
1115 start_info->start_arg = NULL;
1116 start_info->delegate = start;
1117 start_info->obj = this_obj;
1118 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1120 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1122 UNLOCK_THREAD (internal);
1126 internal->state &= ~ThreadState_Unstarted;
1128 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1130 UNLOCK_THREAD (internal);
1131 return internal->handle;
1135 * This is called from the finalizer of the internal thread object.
1138 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1140 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1143 * Since threads keep a reference to their thread object while running, by the time this function is called,
1144 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1145 * when thread_cleanup () can be called after this.
1148 CloseHandle (thread);
1150 if (this_obj->synch_cs) {
1151 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1152 this_obj->synch_cs = NULL;
1153 mono_coop_mutex_destroy (synch_cs);
1157 if (this_obj->name) {
1158 void *name = this_obj->name;
1159 this_obj->name = NULL;
1165 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1168 MonoInternalThread *thread = mono_thread_internal_current ();
1170 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1172 mono_thread_current_check_pending_interrupt ();
1175 gboolean alerted = FALSE;
1177 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1179 res = mono_thread_info_sleep (ms, &alerted);
1181 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1184 MonoException* exc = mono_thread_execute_interruption ();
1186 mono_raise_exception (exc);
1198 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1203 ves_icall_System_Threading_Thread_GetDomainID (void)
1205 return mono_domain_get()->domain_id;
1209 ves_icall_System_Threading_Thread_Yield (void)
1211 return mono_thread_info_yield ();
1215 * mono_thread_get_name:
1217 * Return the name of the thread. NAME_LEN is set to the length of the name.
1218 * Return NULL if the thread has no name. The returned memory is owned by the
1222 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1226 LOCK_THREAD (this_obj);
1228 if (!this_obj->name) {
1232 *name_len = this_obj->name_len;
1233 res = g_new (gunichar2, this_obj->name_len);
1234 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1237 UNLOCK_THREAD (this_obj);
1243 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1247 LOCK_THREAD (this_obj);
1249 if (!this_obj->name)
1252 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1254 UNLOCK_THREAD (this_obj);
1260 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1262 LOCK_THREAD (this_obj);
1264 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1265 UNLOCK_THREAD (this_obj);
1267 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1270 if (this_obj->name) {
1271 g_free (this_obj->name);
1272 this_obj->name_len = 0;
1275 this_obj->name = g_new (gunichar2, mono_string_length (name));
1276 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1277 this_obj->name_len = mono_string_length (name);
1280 this_obj->name = NULL;
1283 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1285 UNLOCK_THREAD (this_obj);
1287 if (this_obj->name && this_obj->tid) {
1288 char *tname = mono_string_to_utf8 (name);
1289 mono_profiler_thread_name (this_obj->tid, tname);
1290 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1296 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1298 mono_thread_set_name_internal (this_obj, name, TRUE);
1302 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1304 return ThreadPriority_Lowest;
1308 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1312 /* If the array is already in the requested domain, we just return it,
1313 otherwise we return a copy in that domain. */
1315 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1322 if (mono_object_domain (arr) == domain)
1325 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1326 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1331 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1333 return byte_array_to_domain (arr, mono_get_root_domain ());
1337 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1339 return byte_array_to_domain (arr, mono_domain_get ());
1343 mono_thread_current (void)
1345 MonoDomain *domain = mono_domain_get ();
1346 MonoInternalThread *internal = mono_thread_internal_current ();
1347 MonoThread **current_thread_ptr;
1349 g_assert (internal);
1350 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1352 if (!*current_thread_ptr) {
1353 g_assert (domain != mono_get_root_domain ());
1354 *current_thread_ptr = new_thread_with_internal (domain, internal);
1356 return *current_thread_ptr;
1359 /* Return the thread object belonging to INTERNAL in the current domain */
1361 mono_thread_current_for_thread (MonoInternalThread *internal)
1363 MonoDomain *domain = mono_domain_get ();
1364 MonoThread **current_thread_ptr;
1366 g_assert (internal);
1367 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1369 if (!*current_thread_ptr) {
1370 g_assert (domain != mono_get_root_domain ());
1371 *current_thread_ptr = new_thread_with_internal (domain, internal);
1373 return *current_thread_ptr;
1377 mono_thread_internal_current (void)
1379 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1380 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1385 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1387 MonoInternalThread *thread = this_obj->internal_thread;
1388 HANDLE handle = thread->handle;
1389 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1392 mono_thread_current_check_pending_interrupt ();
1394 LOCK_THREAD (thread);
1396 if ((thread->state & ThreadState_Unstarted) != 0) {
1397 UNLOCK_THREAD (thread);
1399 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1403 UNLOCK_THREAD (thread);
1408 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1410 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1412 MONO_PREPARE_BLOCKING;
1413 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1414 MONO_FINISH_BLOCKING;
1416 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1418 if(ret==WAIT_OBJECT_0) {
1419 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1424 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1430 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1438 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1440 MONO_PREPARE_BLOCKING;
1442 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1444 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1445 MONO_FINISH_BLOCKING;
1447 if (ret != WAIT_IO_COMPLETION)
1450 exc = mono_thread_execute_interruption ();
1452 mono_raise_exception (exc);
1457 /* Re-calculate ms according to the time passed */
1458 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1459 if (diff_ms >= ms) {
1463 wait = ms - diff_ms;
1469 /* FIXME: exitContext isnt documented */
1470 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1476 MonoObject *waitHandle;
1477 MonoInternalThread *thread = mono_thread_internal_current ();
1479 /* Do this WaitSleepJoin check before creating objects */
1480 mono_thread_current_check_pending_interrupt ();
1482 /* We fail in managed if the array has more than 64 elements */
1483 numhandles = (guint32)mono_array_length(mono_handles);
1484 handles = g_new0(HANDLE, numhandles);
1486 for(i = 0; i < numhandles; i++) {
1487 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1488 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1495 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1497 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1499 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1503 if(ret==WAIT_FAILED) {
1504 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1506 } else if(ret==WAIT_TIMEOUT) {
1507 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1514 /* FIXME: exitContext isnt documented */
1515 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1517 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1518 uintptr_t numhandles;
1521 MonoObject *waitHandle;
1522 MonoInternalThread *thread = mono_thread_internal_current ();
1524 /* Do this WaitSleepJoin check before creating objects */
1525 mono_thread_current_check_pending_interrupt ();
1527 numhandles = mono_array_length(mono_handles);
1528 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1531 for(i = 0; i < numhandles; i++) {
1532 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1533 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1540 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1542 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1544 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1546 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1549 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1551 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1552 return ret - WAIT_OBJECT_0;
1554 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1555 return ret - WAIT_ABANDONED_0;
1562 /* FIXME: exitContext isnt documented */
1563 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1566 MonoInternalThread *thread = mono_thread_internal_current ();
1568 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1574 mono_thread_current_check_pending_interrupt ();
1576 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1578 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1580 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1582 if(ret==WAIT_FAILED) {
1583 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1585 } else if(ret==WAIT_TIMEOUT) {
1586 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1594 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1597 MonoInternalThread *thread = mono_thread_internal_current ();
1602 mono_thread_current_check_pending_interrupt ();
1604 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1606 MONO_PREPARE_BLOCKING;
1607 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1608 MONO_FINISH_BLOCKING;
1610 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1612 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1615 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1622 mutex = CreateMutex (NULL, owned, NULL);
1624 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1626 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1634 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1635 return(ReleaseMutex (handle));
1638 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1644 *error = ERROR_SUCCESS;
1646 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1648 *error = GetLastError ();
1655 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1662 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1664 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1665 mono_string_chars (name));
1667 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1675 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1679 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1684 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1688 *error = ERROR_SUCCESS;
1690 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1692 *error = GetLastError ();
1698 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1705 event = CreateEvent (NULL, manual, initial, NULL);
1707 event = CreateEvent (NULL, manual, initial,
1708 mono_string_chars (name));
1710 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1718 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1719 return (SetEvent(handle));
1722 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1723 return (ResetEvent(handle));
1727 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1728 CloseHandle (handle);
1731 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1737 *error = ERROR_SUCCESS;
1739 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1741 *error = GetLastError ();
1747 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1749 return InterlockedIncrement (location);
1752 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1754 #if SIZEOF_VOID_P == 4
1755 if (G_UNLIKELY ((size_t)location & 0x7)) {
1757 mono_interlocked_lock ();
1760 mono_interlocked_unlock ();
1764 return InterlockedIncrement64 (location);
1767 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1769 return InterlockedDecrement(location);
1772 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1774 #if SIZEOF_VOID_P == 4
1775 if (G_UNLIKELY ((size_t)location & 0x7)) {
1777 mono_interlocked_lock ();
1780 mono_interlocked_unlock ();
1784 return InterlockedDecrement64 (location);
1787 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1789 return InterlockedExchange(location, value);
1792 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1795 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1796 mono_gc_wbarrier_generic_nostore (location);
1800 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1802 return InterlockedExchangePointer(location, value);
1805 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1807 IntFloatUnion val, ret;
1810 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1816 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1818 #if SIZEOF_VOID_P == 4
1819 if (G_UNLIKELY ((size_t)location & 0x7)) {
1821 mono_interlocked_lock ();
1824 mono_interlocked_unlock ();
1828 return InterlockedExchange64 (location, value);
1832 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1834 LongDoubleUnion val, ret;
1837 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1842 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1844 return InterlockedCompareExchange(location, value, comparand);
1847 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1849 gint32 r = InterlockedCompareExchange(location, value, comparand);
1850 *success = r == comparand;
1854 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1857 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1858 mono_gc_wbarrier_generic_nostore (location);
1862 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1864 return InterlockedCompareExchangePointer(location, value, comparand);
1867 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1869 IntFloatUnion val, ret, cmp;
1872 cmp.fval = comparand;
1873 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1879 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1881 #if SIZEOF_VOID_P == 8
1882 LongDoubleUnion val, comp, ret;
1885 comp.fval = comparand;
1886 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1892 mono_interlocked_lock ();
1894 if (old == comparand)
1896 mono_interlocked_unlock ();
1903 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1905 #if SIZEOF_VOID_P == 4
1906 if (G_UNLIKELY ((size_t)location & 0x7)) {
1908 mono_interlocked_lock ();
1910 if (old == comparand)
1912 mono_interlocked_unlock ();
1916 return InterlockedCompareExchange64 (location, value, comparand);
1920 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1923 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1924 mono_gc_wbarrier_generic_nostore (location);
1929 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1932 res = InterlockedExchangePointer ((gpointer *)location, value);
1933 mono_gc_wbarrier_generic_nostore (location);
1938 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1940 return InterlockedAdd (location, value);
1944 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1946 #if SIZEOF_VOID_P == 4
1947 if (G_UNLIKELY ((size_t)location & 0x7)) {
1949 mono_interlocked_lock ();
1952 mono_interlocked_unlock ();
1956 return InterlockedAdd64 (location, value);
1960 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1962 #if SIZEOF_VOID_P == 4
1963 if (G_UNLIKELY ((size_t)location & 0x7)) {
1965 mono_interlocked_lock ();
1967 mono_interlocked_unlock ();
1971 return InterlockedRead64 (location);
1975 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1977 mono_memory_barrier ();
1981 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1983 mono_thread_clr_state (this, state);
1985 if (state & ThreadState_Background) {
1986 /* If the thread changes the background mode, the main thread has to
1987 * be notified, since it has to rebuild the list of threads to
1990 SetEvent (background_change_event);
1995 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
1997 mono_thread_set_state (this, state);
1999 if (state & ThreadState_Background) {
2000 /* If the thread changes the background mode, the main thread has to
2001 * be notified, since it has to rebuild the list of threads to
2004 SetEvent (background_change_event);
2009 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2015 state = this->state;
2017 UNLOCK_THREAD (this);
2022 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2024 MonoInternalThread *current;
2026 MonoInternalThread *thread = this_obj->internal_thread;
2028 LOCK_THREAD (thread);
2030 current = mono_thread_internal_current ();
2032 thread->thread_interrupt_requested = TRUE;
2033 throw = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2035 UNLOCK_THREAD (thread);
2038 abort_thread_internal (thread, TRUE, FALSE);
2042 void mono_thread_current_check_pending_interrupt ()
2044 MonoInternalThread *thread = mono_thread_internal_current ();
2045 gboolean throw = FALSE;
2047 LOCK_THREAD (thread);
2049 if (thread->thread_interrupt_requested) {
2051 thread->thread_interrupt_requested = FALSE;
2054 UNLOCK_THREAD (thread);
2057 mono_raise_exception (mono_get_exception_thread_interrupted ());
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 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), thread, (gsize)thread->tid));
2093 /* During shutdown, we can't wait for other threads */
2095 /* Make sure the thread is awake */
2096 mono_thread_resume (thread);
2098 UNLOCK_THREAD (thread);
2100 abort_thread_internal (thread, TRUE, TRUE);
2104 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
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_obj)
2151 MonoInternalThread *thread = this_obj->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 (MonoThread *this_obj)
2210 if (!mono_thread_suspend (this_obj->internal_thread)) {
2211 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2216 /* LOCKING: LOCK_THREAD(thread) must be held */
2218 mono_thread_resume (MonoInternalThread *thread)
2220 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2221 thread->state &= ~ThreadState_SuspendRequested;
2225 if ((thread->state & ThreadState_Suspended) == 0 ||
2226 (thread->state & ThreadState_Unstarted) != 0 ||
2227 (thread->state & ThreadState_Aborted) != 0 ||
2228 (thread->state & ThreadState_Stopped) != 0)
2233 UNLOCK_THREAD (thread);
2235 /* Awake the thread */
2236 if (!mono_thread_info_resume (thread_get_tid (thread)))
2239 LOCK_THREAD (thread);
2241 thread->state &= ~ThreadState_Suspended;
2247 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2249 if (!thread->internal_thread) {
2250 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2252 LOCK_THREAD (thread->internal_thread);
2253 if (!mono_thread_resume (thread->internal_thread))
2254 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2255 UNLOCK_THREAD (thread->internal_thread);
2260 mono_threads_is_critical_method (MonoMethod *method)
2262 switch (method->wrapper_type) {
2263 case MONO_WRAPPER_RUNTIME_INVOKE:
2264 case MONO_WRAPPER_XDOMAIN_INVOKE:
2265 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2272 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2277 if (mono_threads_is_critical_method (m)) {
2278 *((gboolean*)data) = TRUE;
2285 is_running_protected_wrapper (void)
2287 gboolean found = FALSE;
2288 mono_stack_walk (find_wrapper, &found);
2292 void mono_thread_internal_stop (MonoInternalThread *thread)
2294 LOCK_THREAD (thread);
2296 if ((thread->state & ThreadState_StopRequested) != 0 ||
2297 (thread->state & ThreadState_Stopped) != 0)
2299 UNLOCK_THREAD (thread);
2303 /* Make sure the thread is awake */
2304 mono_thread_resume (thread);
2306 thread->state |= ThreadState_StopRequested;
2307 thread->state &= ~ThreadState_AbortRequested;
2309 UNLOCK_THREAD (thread);
2311 abort_thread_internal (thread, TRUE, TRUE);
2314 void mono_thread_stop (MonoThread *thread)
2316 mono_thread_internal_stop (thread->internal_thread);
2320 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2323 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2328 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2331 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2336 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2339 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2344 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2347 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2352 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2355 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2356 return (void *) tmp;
2360 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2362 volatile MonoObject *tmp;
2363 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2364 return (MonoObject *) tmp;
2368 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2371 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2376 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2379 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2384 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2386 return InterlockedRead8 (ptr);
2390 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2392 return InterlockedRead16 (ptr);
2396 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2398 return InterlockedRead (ptr);
2402 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2404 #if SIZEOF_VOID_P == 4
2405 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2407 mono_interlocked_lock ();
2408 val = *(gint64*)ptr;
2409 mono_interlocked_unlock ();
2413 return InterlockedRead64 (ptr);
2417 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2419 return InterlockedReadPointer (ptr);
2423 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2427 #if SIZEOF_VOID_P == 4
2428 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2430 mono_interlocked_lock ();
2431 val = *(double*)ptr;
2432 mono_interlocked_unlock ();
2437 u.ival = InterlockedRead64 (ptr);
2443 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2447 u.ival = InterlockedRead (ptr);
2453 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2455 return InterlockedReadPointer (ptr);
2459 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2461 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2465 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2467 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2471 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2473 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2477 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2479 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2483 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2485 mono_atomic_store_release ((volatile void **) ptr, value);
2489 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2491 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2495 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2497 mono_atomic_store_release ((volatile double *) ptr, value);
2501 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2503 mono_atomic_store_release ((volatile float *) ptr, value);
2507 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2509 InterlockedWrite8 (ptr, value);
2513 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2515 InterlockedWrite16 (ptr, value);
2519 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2521 InterlockedWrite (ptr, value);
2525 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2527 #if SIZEOF_VOID_P == 4
2528 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2529 mono_interlocked_lock ();
2530 *(gint64*)ptr = value;
2531 mono_interlocked_unlock ();
2536 InterlockedWrite64 (ptr, value);
2540 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2542 InterlockedWritePointer (ptr, value);
2546 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2550 #if SIZEOF_VOID_P == 4
2551 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2552 mono_interlocked_lock ();
2553 *(double*)ptr = value;
2554 mono_interlocked_unlock ();
2561 InterlockedWrite64 (ptr, u.ival);
2565 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2571 InterlockedWrite (ptr, u.ival);
2575 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2577 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2581 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2583 mono_threads_lock ();
2585 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2588 contexts = g_hash_table_new (NULL, NULL);
2590 context_adjust_static_data (ctx);
2591 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2592 g_hash_table_insert (contexts, gch, gch);
2594 mono_threads_unlock ();
2596 mono_profiler_context_loaded (ctx);
2600 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2603 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2604 * cleanup in exceptional circumstances, we don't actually do any
2605 * cleanup work here. We instead do this when we iterate the `contexts`
2606 * hash table. The only purpose of this finalizer, at the moment, is to
2607 * notify the profiler.
2610 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2612 mono_profiler_context_unloaded (ctx);
2616 mono_thread_init_tls (void)
2618 MONO_FAST_TLS_INIT (tls_current_object);
2619 mono_native_tls_alloc (¤t_object_key, NULL);
2622 void mono_thread_init (MonoThreadStartCB start_cb,
2623 MonoThreadAttachCB attach_cb)
2625 mono_os_mutex_init_recursive(&threads_mutex);
2626 mono_os_mutex_init_recursive(&interlocked_mutex);
2627 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2629 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2630 g_assert(background_change_event != NULL);
2632 mono_init_static_data_info (&thread_static_info);
2633 mono_init_static_data_info (&context_static_info);
2635 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2637 mono_thread_start_cb = start_cb;
2638 mono_thread_attach_cb = attach_cb;
2640 /* Get a pseudo handle to the current process. This is just a
2641 * kludge so that wapi can build a process handle if needed.
2642 * As a pseudo handle is returned, we don't need to clean
2645 GetCurrentProcess ();
2648 void mono_thread_cleanup (void)
2650 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2651 MonoThreadInfo *info;
2653 /* The main thread must abandon any held mutexes (particularly
2654 * important for named mutexes as they are shared across
2655 * processes, see bug 74680.) This will happen when the
2656 * thread exits, but if it's not running in a subthread it
2657 * won't exit in time.
2659 info = mono_thread_info_current ();
2660 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2664 /* This stuff needs more testing, it seems one of these
2665 * critical sections can be locked when mono_thread_cleanup is
2668 mono_os_mutex_destroy (&threads_mutex);
2669 mono_os_mutex_destroy (&interlocked_mutex);
2670 mono_os_mutex_destroy (&delayed_free_table_mutex);
2671 mono_os_mutex_destroy (&small_id_mutex);
2672 CloseHandle (background_change_event);
2675 mono_native_tls_free (current_object_key);
2679 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2681 mono_thread_cleanup_fn = func;
2685 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2687 thread->internal_thread->manage_callback = func;
2690 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2692 mono_thread_notify_pending_exc_fn = func;
2696 static void print_tids (gpointer key, gpointer value, gpointer user)
2698 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2699 * sizeof(uint) and a cast to uint would overflow
2701 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2702 * print this as a pointer.
2704 g_message ("Waiting for: %p", key);
2709 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2710 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2714 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2718 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2720 MONO_PREPARE_BLOCKING;
2721 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2722 MONO_FINISH_BLOCKING;
2724 if(ret==WAIT_FAILED) {
2725 /* See the comment in build_wait_tids() */
2726 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2730 for(i=0; i<wait->num; i++)
2731 CloseHandle (wait->handles[i]);
2733 if (ret == WAIT_TIMEOUT)
2736 for(i=0; i<wait->num; i++) {
2737 gsize tid = wait->threads[i]->tid;
2740 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2741 * it can still run io-layer etc. code. So wait for it to really exit.
2742 * FIXME: This won't join threads which are not in the joinable_hash yet.
2744 mono_thread_join ((gpointer)tid);
2746 mono_threads_lock ();
2747 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2748 /* This thread must have been killed, because
2749 * it hasn't cleaned itself up. (It's just
2750 * possible that the thread exited before the
2751 * parent thread had a chance to store the
2752 * handle, and now there is another pointer to
2753 * the already-exited thread stored. In this
2754 * case, we'll just get two
2755 * mono_profiler_thread_end() calls for the
2759 mono_threads_unlock ();
2760 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2761 thread_cleanup (wait->threads[i]);
2763 mono_threads_unlock ();
2768 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2770 guint32 i, ret, count;
2772 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2774 /* Add the thread state change event, so it wakes up if a thread changes
2775 * to background mode.
2778 if (count < MAXIMUM_WAIT_OBJECTS) {
2779 wait->handles [count] = background_change_event;
2783 MONO_PREPARE_BLOCKING;
2784 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2785 MONO_FINISH_BLOCKING;
2787 if(ret==WAIT_FAILED) {
2788 /* See the comment in build_wait_tids() */
2789 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2793 for(i=0; i<wait->num; i++)
2794 CloseHandle (wait->handles[i]);
2796 if (ret == WAIT_TIMEOUT)
2799 if (ret < wait->num) {
2800 gsize tid = wait->threads[ret]->tid;
2801 mono_threads_lock ();
2802 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2803 /* See comment in wait_for_tids about thread cleanup */
2804 mono_threads_unlock ();
2805 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2806 thread_cleanup (wait->threads [ret]);
2808 mono_threads_unlock ();
2812 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2814 struct wait_data *wait=(struct wait_data *)user;
2816 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2818 MonoInternalThread *thread=(MonoInternalThread *)value;
2820 /* Ignore background threads, we abort them later */
2821 /* Do not lock here since it is not needed and the caller holds threads_lock */
2822 if (thread->state & ThreadState_Background) {
2823 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2824 return; /* just leave, ignore */
2827 if (mono_gc_is_finalizer_internal_thread (thread)) {
2828 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2832 if (thread == mono_thread_internal_current ()) {
2833 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2837 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2838 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2842 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2843 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2847 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2848 if (handle == NULL) {
2849 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2853 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2854 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2855 wait->handles[wait->num]=handle;
2856 wait->threads[wait->num]=thread;
2859 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2861 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2866 /* Just ignore the rest, we can't do anything with
2873 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2875 struct wait_data *wait=(struct wait_data *)user;
2876 MonoNativeThreadId self = mono_native_thread_id_get ();
2877 MonoInternalThread *thread = value;
2880 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2883 /* The finalizer thread is not a background thread */
2884 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
2885 && (thread->state & ThreadState_Background) != 0
2886 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
2888 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2892 /* printf ("A: %d\n", wait->num); */
2893 wait->handles[wait->num]=thread->handle;
2894 wait->threads[wait->num]=thread;
2897 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2898 mono_thread_internal_stop (thread);
2902 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
2903 && !mono_gc_is_finalizer_internal_thread (thread);
2907 * mono_threads_set_shutting_down:
2909 * Is called by a thread that wants to shut down Mono. If the runtime is already
2910 * shutting down, the calling thread is suspended/stopped, and this function never
2914 mono_threads_set_shutting_down (void)
2916 MonoInternalThread *current_thread = mono_thread_internal_current ();
2918 mono_threads_lock ();
2920 if (shutting_down) {
2921 mono_threads_unlock ();
2923 /* Make sure we're properly suspended/stopped */
2925 LOCK_THREAD (current_thread);
2927 if ((current_thread->state & ThreadState_SuspendRequested) ||
2928 (current_thread->state & ThreadState_AbortRequested) ||
2929 (current_thread->state & ThreadState_StopRequested)) {
2930 UNLOCK_THREAD (current_thread);
2931 mono_thread_execute_interruption ();
2933 current_thread->state |= ThreadState_Stopped;
2934 UNLOCK_THREAD (current_thread);
2937 /*since we're killing the thread, unset the current domain.*/
2938 mono_domain_unset ();
2940 /* Wake up other threads potentially waiting for us */
2941 mono_thread_info_exit ();
2943 shutting_down = TRUE;
2945 /* Not really a background state change, but this will
2946 * interrupt the main thread if it is waiting for all
2947 * the other threads.
2949 SetEvent (background_change_event);
2951 mono_threads_unlock ();
2955 void mono_thread_manage (void)
2957 struct wait_data wait_data;
2958 struct wait_data *wait = &wait_data;
2960 memset (wait, 0, sizeof (struct wait_data));
2961 /* join each thread that's still running */
2962 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2964 mono_threads_lock ();
2966 THREAD_DEBUG (g_message("%s: No threads", __func__));
2967 mono_threads_unlock ();
2970 mono_threads_unlock ();
2973 mono_threads_lock ();
2974 if (shutting_down) {
2975 /* somebody else is shutting down */
2976 mono_threads_unlock ();
2979 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2980 mono_g_hash_table_foreach (threads, print_tids, NULL));
2982 ResetEvent (background_change_event);
2984 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2985 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2986 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2987 mono_threads_unlock ();
2989 /* Something to wait for */
2990 wait_for_tids_or_state_change (wait, INFINITE);
2992 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2993 } while(wait->num>0);
2995 /* Mono is shutting down, so just wait for the end */
2996 if (!mono_runtime_try_shutdown ()) {
2997 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2998 mono_thread_suspend (mono_thread_internal_current ());
2999 mono_thread_execute_interruption ();
3003 * Remove everything but the finalizer thread and self.
3004 * Also abort all the background threads
3007 mono_threads_lock ();
3010 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3011 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3012 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3014 mono_threads_unlock ();
3016 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3018 /* Something to wait for */
3019 wait_for_tids (wait, INFINITE);
3021 } while (wait->num > 0);
3024 * give the subthreads a chance to really quit (this is mainly needed
3025 * to get correct user and system times from getrusage/wait/time(1)).
3026 * This could be removed if we avoid pthread_detach() and use pthread_join().
3028 mono_thread_info_yield ();
3032 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3034 MonoInternalThread *thread = (MonoInternalThread*)value;
3035 struct wait_data *wait = (struct wait_data*)user_data;
3039 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3041 * This needs no locking.
3043 if ((thread->state & ThreadState_Suspended) != 0 ||
3044 (thread->state & ThreadState_Stopped) != 0)
3047 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3048 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3052 wait->handles [wait->num] = handle;
3053 wait->threads [wait->num] = thread;
3059 * mono_thread_suspend_all_other_threads:
3061 * Suspend all managed threads except the finalizer thread and this thread. It is
3062 * not possible to resume them later.
3064 void mono_thread_suspend_all_other_threads (void)
3066 struct wait_data wait_data;
3067 struct wait_data *wait = &wait_data;
3069 MonoNativeThreadId self = mono_native_thread_id_get ();
3070 guint32 eventidx = 0;
3071 gboolean starting, finished;
3073 memset (wait, 0, sizeof (struct wait_data));
3075 * The other threads could be in an arbitrary state at this point, i.e.
3076 * they could be starting up, shutting down etc. This means that there could be
3077 * threads which are not even in the threads hash table yet.
3081 * First we set a barrier which will be checked by all threads before they
3082 * are added to the threads hash table, and they will exit if the flag is set.
3083 * This ensures that no threads could be added to the hash later.
3084 * We will use shutting_down as the barrier for now.
3086 g_assert (shutting_down);
3089 * We make multiple calls to WaitForMultipleObjects since:
3090 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3091 * - some threads could exit without becoming suspended
3096 * Make a copy of the hashtable since we can't do anything with
3097 * threads while threads_mutex is held.
3100 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3101 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3102 mono_threads_lock ();
3103 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3104 mono_threads_unlock ();
3107 /* Get the suspended events that we'll be waiting for */
3108 for (i = 0; i < wait->num; ++i) {
3109 MonoInternalThread *thread = wait->threads [i];
3111 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3112 || mono_gc_is_finalizer_internal_thread (thread)
3113 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3115 //CloseHandle (wait->handles [i]);
3116 wait->threads [i] = NULL; /* ignore this thread in next loop */
3120 LOCK_THREAD (thread);
3122 if ((thread->state & ThreadState_Suspended) != 0 ||
3123 (thread->state & ThreadState_StopRequested) != 0 ||
3124 (thread->state & ThreadState_Stopped) != 0) {
3125 UNLOCK_THREAD (thread);
3126 CloseHandle (wait->handles [i]);
3127 wait->threads [i] = NULL; /* ignore this thread in next loop */
3133 /* Convert abort requests into suspend requests */
3134 if ((thread->state & ThreadState_AbortRequested) != 0)
3135 thread->state &= ~ThreadState_AbortRequested;
3137 thread->state |= ThreadState_SuspendRequested;
3139 UNLOCK_THREAD (thread);
3141 /* Signal the thread to suspend */
3142 suspend_thread_internal (thread, TRUE);
3144 if (eventidx <= 0) {
3146 * If there are threads which are starting up, we wait until they
3147 * are suspended when they try to register in the threads hash.
3148 * This is guaranteed to finish, since the threads which can create new
3149 * threads get suspended after a while.
3150 * FIXME: The finalizer thread can still create new threads.
3152 mono_threads_lock ();
3153 if (threads_starting_up)
3154 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3157 mono_threads_unlock ();
3159 mono_thread_info_sleep (100, NULL);
3167 MonoInternalThread *thread;
3168 MonoStackFrameInfo *frames;
3169 int nframes, max_frames;
3170 int nthreads, max_threads;
3171 MonoInternalThread **threads;
3172 } ThreadDumpUserData;
3174 static gboolean thread_dump_requested;
3176 /* This needs to be async safe */
3178 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3180 ThreadDumpUserData *ud = data;
3182 if (ud->nframes < ud->max_frames) {
3183 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3190 /* This needs to be async safe */
3191 static SuspendThreadResult
3192 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3194 ThreadDumpUserData *user_data = ud;
3195 MonoInternalThread *thread = user_data->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 if (thread == mono_thread_internal_current ())
3207 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3209 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3211 return MonoResumeThread;
3215 int nthreads, max_threads;
3216 MonoInternalThread **threads;
3217 } CollectThreadsUserData;
3220 collect_thread (gpointer key, gpointer value, gpointer user)
3222 CollectThreadsUserData *ud = user;
3223 MonoInternalThread *thread = value;
3225 if (ud->nthreads < ud->max_threads)
3226 ud->threads [ud->nthreads ++] = thread;
3230 * Collect running threads into the THREADS array.
3231 * THREADS should be an array allocated on the stack.
3234 collect_threads (MonoInternalThread **thread_array, int max_threads)
3236 CollectThreadsUserData ud;
3238 memset (&ud, 0, sizeof (ud));
3239 /* This array contains refs, but its on the stack, so its ok */
3240 ud.threads = thread_array;
3241 ud.max_threads = max_threads;
3243 mono_threads_lock ();
3244 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3245 mono_threads_unlock ();
3251 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3253 GString* text = g_string_new (0);
3255 GError *error = NULL;
3258 ud->thread = thread;
3261 /* Collect frames for the thread */
3262 if (thread == mono_thread_internal_current ()) {
3263 get_thread_dump (mono_thread_info_current (), ud);
3265 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3269 * Do all the non async-safe work outside of get_thread_dump.
3272 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3274 g_string_append_printf (text, "\n\"%s\"", name);
3277 else if (thread->threadpool_thread) {
3278 g_string_append (text, "\n\"<threadpool thread>\"");
3280 g_string_append (text, "\n\"<unnamed thread>\"");
3283 for (i = 0; i < ud->nframes; ++i) {
3284 MonoStackFrameInfo *frame = &ud->frames [i];
3285 MonoMethod *method = NULL;
3287 if (frame->type == FRAME_TYPE_MANAGED)
3288 method = mono_jit_info_get_method (frame->ji);
3291 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3292 g_string_append_printf (text, " %s\n", location);
3295 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3299 fprintf (stdout, "%s", text->str);
3301 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3302 OutputDebugStringA(text->str);
3305 g_string_free (text, TRUE);
3310 mono_threads_perform_thread_dump (void)
3312 ThreadDumpUserData ud;
3313 MonoInternalThread *thread_array [128];
3314 int tindex, nthreads;
3316 if (!thread_dump_requested)
3319 printf ("Full thread dump:\n");
3321 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3322 nthreads = collect_threads (thread_array, 128);
3324 memset (&ud, 0, sizeof (ud));
3325 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3326 ud.max_frames = 256;
3328 for (tindex = 0; tindex < nthreads; ++tindex)
3329 dump_thread (thread_array [tindex], &ud);
3333 thread_dump_requested = FALSE;
3336 /* Obtain the thread dump of all threads */
3338 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3340 ThreadDumpUserData ud;
3341 MonoInternalThread *thread_array [128];
3342 MonoDomain *domain = mono_domain_get ();
3343 MonoDebugSourceLocation *location;
3344 int tindex, nthreads;
3346 *out_threads = NULL;
3347 *out_stack_frames = NULL;
3349 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3350 nthreads = collect_threads (thread_array, 128);
3352 memset (&ud, 0, sizeof (ud));
3353 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3354 ud.max_frames = 256;
3356 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3357 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3359 for (tindex = 0; tindex < nthreads; ++tindex) {
3360 MonoInternalThread *thread = thread_array [tindex];
3361 MonoArray *thread_frames;
3367 /* Collect frames for the thread */
3368 if (thread == mono_thread_internal_current ()) {
3369 get_thread_dump (mono_thread_info_current (), &ud);
3371 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3374 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3376 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3377 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3379 for (i = 0; i < ud.nframes; ++i) {
3380 MonoStackFrameInfo *frame = &ud.frames [i];
3381 MonoMethod *method = NULL;
3382 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
3384 sf->native_offset = frame->native_offset;
3386 if (frame->type == FRAME_TYPE_MANAGED)
3387 method = mono_jit_info_get_method (frame->ji);
3390 sf->method_address = (gsize) frame->ji->code_start;
3392 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3394 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3396 sf->il_offset = location->il_offset;
3398 if (location && location->source_file) {
3399 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3400 sf->line = location->row;
3401 sf->column = location->column;
3403 mono_debug_free_source_location (location);
3408 mono_array_setref (thread_frames, i, sf);
3416 * mono_threads_request_thread_dump:
3418 * Ask all threads except the current to print their stacktrace to stdout.
3421 mono_threads_request_thread_dump (void)
3423 /*The new thread dump code runs out of the finalizer thread. */
3424 thread_dump_requested = TRUE;
3425 mono_gc_finalize_notify ();
3430 gint allocated; /* +1 so that refs [allocated] == NULL */
3434 typedef struct ref_stack RefStack;
3437 ref_stack_new (gint initial_size)
3441 initial_size = MAX (initial_size, 16) + 1;
3442 rs = g_new0 (RefStack, 1);
3443 rs->refs = g_new0 (gpointer, initial_size);
3444 rs->allocated = initial_size;
3449 ref_stack_destroy (gpointer ptr)
3460 ref_stack_push (RefStack *rs, gpointer ptr)
3462 g_assert (rs != NULL);
3464 if (rs->bottom >= rs->allocated) {
3465 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3466 rs->allocated <<= 1;
3467 rs->refs [rs->allocated] = NULL;
3469 rs->refs [rs->bottom++] = ptr;
3473 ref_stack_pop (RefStack *rs)
3475 if (rs == NULL || rs->bottom == 0)
3479 rs->refs [rs->bottom] = NULL;
3483 ref_stack_find (RefStack *rs, gpointer ptr)
3490 for (refs = rs->refs; refs && *refs; refs++) {
3498 * mono_thread_push_appdomain_ref:
3500 * Register that the current thread may have references to objects in domain
3501 * @domain on its stack. Each call to this function should be paired with a
3502 * call to pop_appdomain_ref.
3505 mono_thread_push_appdomain_ref (MonoDomain *domain)
3507 MonoInternalThread *thread = mono_thread_internal_current ();
3510 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3511 SPIN_LOCK (thread->lock_thread_id);
3512 if (thread->appdomain_refs == NULL)
3513 thread->appdomain_refs = ref_stack_new (16);
3514 ref_stack_push (thread->appdomain_refs, domain);
3515 SPIN_UNLOCK (thread->lock_thread_id);
3520 mono_thread_pop_appdomain_ref (void)
3522 MonoInternalThread *thread = mono_thread_internal_current ();
3525 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3526 SPIN_LOCK (thread->lock_thread_id);
3527 ref_stack_pop (thread->appdomain_refs);
3528 SPIN_UNLOCK (thread->lock_thread_id);
3533 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3536 SPIN_LOCK (thread->lock_thread_id);
3537 res = ref_stack_find (thread->appdomain_refs, domain);
3538 SPIN_UNLOCK (thread->lock_thread_id);
3543 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3545 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3548 typedef struct abort_appdomain_data {
3549 struct wait_data wait;
3551 } abort_appdomain_data;
3554 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3556 MonoInternalThread *thread = (MonoInternalThread*)value;
3557 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3558 MonoDomain *domain = data->domain;
3560 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3561 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3563 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3564 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3567 data->wait.handles [data->wait.num] = handle;
3568 data->wait.threads [data->wait.num] = thread;
3571 /* Just ignore the rest, we can't do anything with
3579 * mono_threads_abort_appdomain_threads:
3581 * Abort threads which has references to the given appdomain.
3584 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3586 #ifdef __native_client__
3590 abort_appdomain_data user_data;
3592 int orig_timeout = timeout;
3595 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3597 start_time = mono_msec_ticks ();
3599 mono_threads_lock ();
3601 user_data.domain = domain;
3602 user_data.wait.num = 0;
3603 /* This shouldn't take any locks */
3604 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3605 mono_threads_unlock ();
3607 if (user_data.wait.num > 0) {
3608 /* Abort the threads outside the threads lock */
3609 for (i = 0; i < user_data.wait.num; ++i)
3610 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3613 * We should wait for the threads either to abort, or to leave the
3614 * domain. We can't do the latter, so we wait with a timeout.
3616 wait_for_tids (&user_data.wait, 100);
3619 /* Update remaining time */
3620 timeout -= mono_msec_ticks () - start_time;
3621 start_time = mono_msec_ticks ();
3623 if (orig_timeout != -1 && timeout < 0)
3626 while (user_data.wait.num > 0);
3628 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3634 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3636 MonoInternalThread *thread = (MonoInternalThread*)value;
3637 MonoDomain *domain = (MonoDomain*)user_data;
3640 /* No locking needed here */
3641 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3643 if (thread->cached_culture_info) {
3644 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3645 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3646 if (obj && obj->vtable->domain == domain)
3647 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3653 * mono_threads_clear_cached_culture:
3655 * Clear the cached_current_culture from all threads if it is in the
3659 mono_threads_clear_cached_culture (MonoDomain *domain)
3661 mono_threads_lock ();
3662 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3663 mono_threads_unlock ();
3667 * mono_thread_get_undeniable_exception:
3669 * Return an exception which needs to be raised when leaving a catch clause.
3670 * This is used for undeniable exception propagation.
3673 mono_thread_get_undeniable_exception (void)
3675 MonoInternalThread *thread = mono_thread_internal_current ();
3677 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3679 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3680 * exception if the thread no longer references a dying appdomain.
3682 thread->abort_exc->trace_ips = NULL;
3683 thread->abort_exc->stack_trace = NULL;
3684 return thread->abort_exc;
3690 #if MONO_SMALL_CONFIG
3691 #define NUM_STATIC_DATA_IDX 4
3692 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3696 #define NUM_STATIC_DATA_IDX 8
3697 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3698 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3702 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3703 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3706 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3708 gpointer *static_data = addr;
3710 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3711 void **ptr = static_data [i];
3716 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3717 void **p = ptr + idx;
3720 mark_func ((MonoObject**)p, gc_data);
3726 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3728 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3732 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3734 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3738 * mono_alloc_static_data
3740 * Allocate memory blocks for storing threads or context static data
3743 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3745 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3748 gpointer* static_data = *static_data_ptr;
3750 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3751 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3753 if (mono_gc_user_markers_supported ()) {
3754 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3755 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3757 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3758 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3761 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3762 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3763 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3764 *static_data_ptr = static_data;
3765 static_data [0] = static_data;
3768 for (i = 1; i <= idx; ++i) {
3769 if (static_data [i])
3772 if (mono_gc_user_markers_supported ())
3773 static_data [i] = g_malloc0 (static_data_size [i]);
3775 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3776 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3777 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3782 mono_free_static_data (gpointer* static_data)
3785 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3786 gpointer p = static_data [i];
3790 * At this point, the static data pointer array is still registered with the
3791 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3792 * data. Freeing the individual arrays without first nulling their slots
3793 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3794 * such an already freed array. See bug #13813.
3796 static_data [i] = NULL;
3797 mono_memory_write_barrier ();
3798 if (mono_gc_user_markers_supported ())
3801 mono_gc_free_fixed (p);
3803 mono_gc_free_fixed (static_data);
3807 * mono_init_static_data_info
3809 * Initializes static data counters
3811 static void mono_init_static_data_info (StaticDataInfo *static_data)
3813 static_data->idx = 0;
3814 static_data->offset = 0;
3815 static_data->freelist = NULL;
3819 * mono_alloc_static_data_slot
3821 * Generates an offset for static data. static_data contains the counters
3822 * used to generate it.
3825 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3827 if (!static_data->idx && !static_data->offset) {
3829 * we use the first chunk of the first allocation also as
3830 * an array for the rest of the data
3832 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3834 static_data->offset += align - 1;
3835 static_data->offset &= ~(align - 1);
3836 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3837 static_data->idx ++;
3838 g_assert (size <= static_data_size [static_data->idx]);
3839 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3840 static_data->offset = 0;
3842 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
3843 static_data->offset += size;
3848 * ensure thread static fields already allocated are valid for thread
3849 * This function is called when a thread is created or on thread attach.
3852 thread_adjust_static_data (MonoInternalThread *thread)
3854 mono_threads_lock ();
3855 if (thread_static_info.offset || thread_static_info.idx > 0) {
3856 /* get the current allocated size */
3857 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
3858 mono_alloc_static_data (&thread->static_data, offset, TRUE);
3860 mono_threads_unlock ();
3864 * LOCKING: requires that threads_mutex is held
3867 context_adjust_static_data (MonoAppContext *ctx)
3869 if (context_static_info.offset || context_static_info.idx > 0) {
3870 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
3871 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3876 * LOCKING: requires that threads_mutex is held
3879 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3881 MonoInternalThread *thread = value;
3882 guint32 offset = GPOINTER_TO_UINT (user);
3884 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3888 * LOCKING: requires that threads_mutex is held
3891 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
3893 uint32_t gch = GPOINTER_TO_INT (key);
3894 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (gch);
3897 mono_gchandle_free (gch);
3898 return TRUE; // Remove this key/value pair
3901 guint32 offset = GPOINTER_TO_UINT (user);
3902 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3904 return FALSE; // Don't remove it
3907 static StaticDataFreeList*
3908 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3910 StaticDataFreeList* prev = NULL;
3911 StaticDataFreeList* tmp = static_data->freelist;
3913 if (tmp->size == size) {
3915 prev->next = tmp->next;
3917 static_data->freelist = tmp->next;
3926 #if SIZEOF_VOID_P == 4
3933 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
3935 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3937 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
3938 MonoBitSet *rb = sets [idx];
3939 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3940 offset /= sizeof (uintptr_t);
3941 /* offset is now the bitmap offset */
3942 for (int i = 0; i < numbits; ++i) {
3943 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3944 mono_bitset_set_fast (rb, offset + i);
3949 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
3951 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3952 MonoBitSet *rb = sets [idx];
3953 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3954 offset /= sizeof (uintptr_t);
3955 /* offset is now the bitmap offset */
3956 for (int i = 0; i < size / sizeof (uintptr_t); i++)
3957 mono_bitset_clear_fast (rb, offset + i);
3961 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3963 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
3965 StaticDataInfo *info;
3968 if (static_type == SPECIAL_STATIC_THREAD) {
3969 info = &thread_static_info;
3970 sets = thread_reference_bitmaps;
3972 info = &context_static_info;
3973 sets = context_reference_bitmaps;
3976 mono_threads_lock ();
3978 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
3982 offset = item->offset;
3985 offset = mono_alloc_static_data_slot (info, size, align);
3988 update_reference_bitmap (sets, offset, bitmap, numbits);
3990 if (static_type == SPECIAL_STATIC_THREAD) {
3991 /* This can be called during startup */
3992 if (threads != NULL)
3993 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3995 if (contexts != NULL)
3996 g_hash_table_foreach_remove (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
3998 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4001 mono_threads_unlock ();
4007 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4009 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4011 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4012 return get_thread_static_data (thread, offset);
4014 return get_context_static_data (thread->current_appcontext, offset);
4019 mono_get_special_static_data (guint32 offset)
4021 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4030 * LOCKING: requires that threads_mutex is held
4033 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4035 MonoInternalThread *thread = value;
4036 OffsetSize *data = user;
4037 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4038 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4041 if (!thread->static_data || !thread->static_data [idx])
4043 ptr = ((char*) thread->static_data [idx]) + off;
4044 mono_gc_bzero_atomic (ptr, data->size);
4048 * LOCKING: requires that threads_mutex is held
4051 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4053 uint32_t gch = GPOINTER_TO_INT (key);
4054 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (gch);
4057 mono_gchandle_free (gch);
4058 return TRUE; // Remove this key/value pair
4061 OffsetSize *data = user;
4062 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4063 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4066 if (!ctx->static_data || !ctx->static_data [idx])
4067 return FALSE; // Don't remove this key/value pair
4069 ptr = ((char*) ctx->static_data [idx]) + off;
4070 mono_gc_bzero_atomic (ptr, data->size);
4072 return FALSE; // Don't remove this key/value pair
4076 do_free_special_slot (guint32 offset, guint32 size)
4078 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4080 StaticDataInfo *info;
4082 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4083 info = &thread_static_info;
4084 sets = thread_reference_bitmaps;
4086 info = &context_static_info;
4087 sets = context_reference_bitmaps;
4090 guint32 data_offset = offset;
4091 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4092 OffsetSize data = { data_offset, size };
4094 clear_reference_bitmap (sets, data.offset, data.size);
4096 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4097 if (threads != NULL)
4098 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4100 if (contexts != NULL)
4101 g_hash_table_foreach_remove (contexts, free_context_static_data_helper, &data);
4104 if (!mono_runtime_is_shutting_down ()) {
4105 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4107 item->offset = offset;
4110 item->next = info->freelist;
4111 info->freelist = item;
4116 do_free_special (gpointer key, gpointer value, gpointer data)
4118 MonoClassField *field = key;
4119 guint32 offset = GPOINTER_TO_UINT (value);
4122 size = mono_type_size (field->type, &align);
4123 do_free_special_slot (offset, size);
4127 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4129 mono_threads_lock ();
4131 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4133 mono_threads_unlock ();
4137 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4139 /* Only ever called for ThreadLocal instances */
4140 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4142 mono_threads_lock ();
4143 do_free_special_slot (offset, size);
4144 mono_threads_unlock ();
4148 static void CALLBACK dummy_apc (ULONG_PTR param)
4154 * mono_thread_execute_interruption
4156 * Performs the operation that the requested thread state requires (abort,
4159 static MonoException*
4160 mono_thread_execute_interruption (void)
4162 MonoInternalThread *thread = mono_thread_internal_current ();
4164 LOCK_THREAD (thread);
4166 /* MonoThread::interruption_requested can only be changed with atomics */
4167 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4168 /* this will consume pending APC calls */
4170 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4172 InterlockedDecrement (&thread_interruption_requested);
4174 /* Clear the interrupted flag of the thread so it can wait again */
4175 mono_thread_info_clear_self_interrupt ();
4178 if ((thread->state & ThreadState_AbortRequested) != 0) {
4179 UNLOCK_THREAD (thread);
4180 if (thread->abort_exc == NULL) {
4182 * This might be racy, but it has to be called outside the lock
4183 * since it calls managed code.
4185 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4187 return thread->abort_exc;
4189 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4190 self_suspend_internal (thread);
4193 else if ((thread->state & ThreadState_StopRequested) != 0) {
4194 /* FIXME: do this through the JIT? */
4196 UNLOCK_THREAD (thread);
4198 mono_thread_exit ();
4200 } else if (thread->pending_exception) {
4203 exc = thread->pending_exception;
4204 thread->pending_exception = NULL;
4206 UNLOCK_THREAD (thread);
4208 } else if (thread->thread_interrupt_requested) {
4210 thread->thread_interrupt_requested = FALSE;
4211 UNLOCK_THREAD (thread);
4213 return(mono_get_exception_thread_interrupted ());
4216 UNLOCK_THREAD (thread);
4222 * mono_thread_request_interruption
4224 * A signal handler can call this method to request the interruption of a
4225 * thread. The result of the interruption will depend on the current state of
4226 * the thread. If the result is an exception that needs to be throw, it is
4227 * provided as return value.
4230 mono_thread_request_interruption (gboolean running_managed)
4232 MonoInternalThread *thread = mono_thread_internal_current ();
4234 /* The thread may already be stopping */
4239 if (thread->interrupt_on_stop &&
4240 thread->state & ThreadState_StopRequested &&
4241 thread->state & ThreadState_Background)
4245 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4247 InterlockedIncrement (&thread_interruption_requested);
4249 if (!running_managed || is_running_protected_wrapper ()) {
4250 /* Can't stop while in unmanaged code. Increase the global interruption
4251 request count. When exiting the unmanaged method the count will be
4252 checked and the thread will be interrupted. */
4254 if (mono_thread_notify_pending_exc_fn && !running_managed)
4255 /* The JIT will notify the thread about the interruption */
4256 /* This shouldn't take any locks */
4257 mono_thread_notify_pending_exc_fn (NULL);
4259 /* this will awake the thread if it is in WaitForSingleObject
4261 /* Our implementation of this function ignores the func argument */
4263 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4265 mono_thread_info_self_interrupt ();
4270 return mono_thread_execute_interruption ();
4274 /*This function should be called by a thread after it has exited all of
4275 * its handle blocks at interruption time.*/
4277 mono_thread_resume_interruption (void)
4279 MonoInternalThread *thread = mono_thread_internal_current ();
4280 gboolean still_aborting;
4282 /* The thread may already be stopping */
4286 LOCK_THREAD (thread);
4287 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4288 UNLOCK_THREAD (thread);
4290 /*This can happen if the protected block called Thread::ResetAbort*/
4291 if (!still_aborting)
4294 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4296 InterlockedIncrement (&thread_interruption_requested);
4298 mono_thread_info_self_interrupt ();
4300 return mono_thread_execute_interruption ();
4303 gboolean mono_thread_interruption_requested ()
4305 if (thread_interruption_requested) {
4306 MonoInternalThread *thread = mono_thread_internal_current ();
4307 /* The thread may already be stopping */
4309 return (thread->interruption_requested);
4314 static MonoException*
4315 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4317 MonoInternalThread *thread = mono_thread_internal_current ();
4319 /* The thread may already be stopping */
4323 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4324 MonoException* exc = mono_thread_execute_interruption ();
4332 * Performs the interruption of the current thread, if one has been requested,
4333 * and the thread is not running a protected wrapper.
4334 * Return the exception which needs to be thrown, if any.
4337 mono_thread_interruption_checkpoint (void)
4339 return mono_thread_interruption_checkpoint_request (FALSE);
4343 * Performs the interruption of the current thread, if one has been requested.
4344 * Return the exception which needs to be thrown, if any.
4347 mono_thread_force_interruption_checkpoint_noraise (void)
4349 return mono_thread_interruption_checkpoint_request (TRUE);
4353 * Performs the interruption of the current thread, if one has been requested.
4354 * Throw the exception which needs to be thrown, if any.
4357 mono_thread_force_interruption_checkpoint (void)
4361 ex = mono_thread_interruption_checkpoint_request (TRUE);
4363 mono_raise_exception (ex);
4367 * mono_thread_get_and_clear_pending_exception:
4369 * Return any pending exceptions for the current thread and clear it as a side effect.
4372 mono_thread_get_and_clear_pending_exception (void)
4374 MonoInternalThread *thread = mono_thread_internal_current ();
4376 /* The thread may already be stopping */
4380 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4381 return mono_thread_execute_interruption ();
4384 if (thread->pending_exception) {
4385 MonoException *exc = thread->pending_exception;
4387 thread->pending_exception = NULL;
4395 * mono_set_pending_exception:
4397 * Set the pending exception of the current thread to EXC.
4398 * The exception will be thrown when execution returns to managed code.
4401 mono_set_pending_exception (MonoException *exc)
4403 MonoInternalThread *thread = mono_thread_internal_current ();
4405 /* The thread may already be stopping */
4409 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4411 mono_thread_request_interruption (FALSE);
4415 * mono_thread_interruption_request_flag:
4417 * Returns the address of a flag that will be non-zero if an interruption has
4418 * been requested for a thread. The thread to interrupt may not be the current
4419 * thread, so an additional call to mono_thread_interruption_requested() or
4420 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4423 gint32* mono_thread_interruption_request_flag ()
4425 return &thread_interruption_requested;
4429 mono_thread_init_apartment_state (void)
4432 MonoInternalThread* thread = mono_thread_internal_current ();
4434 /* Positive return value indicates success, either
4435 * S_OK if this is first CoInitialize call, or
4436 * S_FALSE if CoInitialize already called, but with same
4437 * threading model. A negative value indicates failure,
4438 * probably due to trying to change the threading model.
4440 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4441 ? COINIT_APARTMENTTHREADED
4442 : COINIT_MULTITHREADED) < 0) {
4443 thread->apartment_state = ThreadApartmentState_Unknown;
4449 mono_thread_cleanup_apartment_state (void)
4452 MonoInternalThread* thread = mono_thread_internal_current ();
4454 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4461 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4463 LOCK_THREAD (thread);
4464 thread->state |= state;
4465 UNLOCK_THREAD (thread);
4469 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4471 LOCK_THREAD (thread);
4472 thread->state &= ~state;
4473 UNLOCK_THREAD (thread);
4477 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4479 gboolean ret = FALSE;
4481 LOCK_THREAD (thread);
4483 if ((thread->state & test) != 0) {
4487 UNLOCK_THREAD (thread);
4492 static gboolean has_tls_get = FALSE;
4495 mono_runtime_set_has_tls_get (gboolean val)
4501 mono_runtime_has_tls_get (void)
4507 self_interrupt_thread (void *_unused)
4509 MonoThreadInfo *info = mono_thread_info_current ();
4510 MonoException *exc = mono_thread_execute_interruption ();
4511 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4512 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. */
4513 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4517 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4521 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4525 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4527 MonoJitInfo **dest = data;
4533 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4535 MonoJitInfo *ji = NULL;
4538 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4543 MonoInternalThread *thread;
4544 gboolean install_async_abort;
4545 MonoThreadInfoInterruptToken *interrupt_token;
4548 static SuspendThreadResult
4549 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4551 AbortThreadData *data = ud;
4552 MonoInternalThread *thread = data->thread;
4553 MonoJitInfo *ji = NULL;
4554 gboolean protected_wrapper;
4555 gboolean running_managed;
4557 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4558 return MonoResumeThread;
4560 /*someone is already interrupting it*/
4561 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4562 return MonoResumeThread;
4564 InterlockedIncrement (&thread_interruption_requested);
4566 ji = mono_thread_info_get_last_managed (info);
4567 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4568 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4570 if (!protected_wrapper && running_managed) {
4571 /*We are in managed code*/
4572 /*Set the thread to call */
4573 if (data->install_async_abort)
4574 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4575 return MonoResumeThread;
4577 if (mono_thread_notify_pending_exc_fn)
4578 /* The JIT will notify the thread about the interruption */
4579 mono_thread_notify_pending_exc_fn (info);
4582 * This will cause waits to be broken.
4583 * It will also prevent the thread from entering a wait, so if the thread returns
4584 * from the wait before it receives the abort signal, it will just spin in the wait
4585 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4588 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4590 return MonoResumeThread;
4595 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4597 AbortThreadData data = { 0 };
4598 data.thread = thread;
4599 data.install_async_abort = install_async_abort;
4602 FIXME this is insanely broken, it doesn't cause interruption to happen
4603 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4605 if (thread == mono_thread_internal_current ()) {
4606 /* Do it synchronously */
4607 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4609 mono_raise_exception (exc);
4611 mono_thread_info_self_interrupt ();
4616 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4617 if (data.interrupt_token)
4618 mono_thread_info_finish_interrupt (data.interrupt_token);
4619 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4623 MonoInternalThread *thread;
4625 MonoThreadInfoInterruptToken *interrupt_token;
4626 } SuspendThreadData;
4628 static SuspendThreadResult
4629 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4631 SuspendThreadData *data = ud;
4632 MonoInternalThread *thread = data->thread;
4633 MonoJitInfo *ji = NULL;
4634 gboolean protected_wrapper;
4635 gboolean running_managed;
4637 ji = mono_thread_info_get_last_managed (info);
4638 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4639 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4641 if (running_managed && !protected_wrapper) {
4642 thread->state &= ~ThreadState_SuspendRequested;
4643 thread->state |= ThreadState_Suspended;
4644 return KeepSuspended;
4646 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4647 InterlockedIncrement (&thread_interruption_requested);
4648 if (data->interrupt)
4649 data->interrupt_token = mono_thread_info_prepare_interrupt (thread->thread_info);
4651 if (mono_thread_notify_pending_exc_fn && !running_managed)
4652 /* The JIT will notify the thread about the interruption */
4653 mono_thread_notify_pending_exc_fn (info);
4654 return MonoResumeThread;
4659 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4661 LOCK_THREAD (thread);
4662 if (thread == mono_thread_internal_current ()) {
4663 mono_thread_info_begin_self_suspend ();
4664 //XXX replace this with better named functions
4665 thread->state &= ~ThreadState_SuspendRequested;
4666 thread->state |= ThreadState_Suspended;
4667 UNLOCK_THREAD (thread);
4668 mono_thread_info_end_self_suspend ();
4670 SuspendThreadData data = { 0 };
4671 data.thread = thread;
4672 data.interrupt = interrupt;
4674 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4675 if (data.interrupt_token)
4676 mono_thread_info_finish_interrupt (data.interrupt_token);
4677 UNLOCK_THREAD (thread);
4681 /*This is called with @thread synch_cs held and it must release it*/
4683 self_suspend_internal (MonoInternalThread *thread)
4685 mono_thread_info_begin_self_suspend ();
4686 thread->state &= ~ThreadState_SuspendRequested;
4687 thread->state |= ThreadState_Suspended;
4688 UNLOCK_THREAD (thread);
4689 mono_thread_info_end_self_suspend ();
4694 * mono_thread_is_foreign:
4695 * @thread: the thread to query
4697 * This function allows one to determine if a thread was created by the mono runtime and has
4698 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4700 * Returns: true if @thread was not created by the runtime.
4703 mono_thread_is_foreign (MonoThread *thread)
4705 MonoThreadInfo *info = thread->internal_thread->thread_info;
4706 return info->runtime_thread == FALSE;
4710 * mono_add_joinable_thread:
4712 * Add TID to the list of joinable threads.
4713 * LOCKING: Acquires the threads lock.
4716 mono_threads_add_joinable_thread (gpointer tid)
4720 * We cannot detach from threads because it causes problems like
4721 * 2fd16f60/r114307. So we collect them and join them when
4722 * we have time (in he finalizer thread).
4724 joinable_threads_lock ();
4725 if (!joinable_threads)
4726 joinable_threads = g_hash_table_new (NULL, NULL);
4727 g_hash_table_insert (joinable_threads, tid, tid);
4728 joinable_thread_count ++;
4729 joinable_threads_unlock ();
4731 mono_gc_finalize_notify ();
4736 * mono_threads_join_threads:
4738 * Join all joinable threads. This is called from the finalizer thread.
4739 * LOCKING: Acquires the threads lock.
4742 mono_threads_join_threads (void)
4745 GHashTableIter iter;
4752 if (!joinable_thread_count)
4756 joinable_threads_lock ();
4758 if (g_hash_table_size (joinable_threads)) {
4759 g_hash_table_iter_init (&iter, joinable_threads);
4760 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4761 thread = (pthread_t)tid;
4762 g_hash_table_remove (joinable_threads, key);
4763 joinable_thread_count --;
4766 joinable_threads_unlock ();
4768 if (thread != pthread_self ())
4769 /* This shouldn't block */
4770 pthread_join (thread, NULL);
4781 * Wait for thread TID to exit.
4782 * LOCKING: Acquires the threads lock.
4785 mono_thread_join (gpointer tid)
4789 gboolean found = FALSE;
4791 joinable_threads_lock ();
4792 if (!joinable_threads)
4793 joinable_threads = g_hash_table_new (NULL, NULL);
4794 if (g_hash_table_lookup (joinable_threads, tid)) {
4795 g_hash_table_remove (joinable_threads, tid);
4796 joinable_thread_count --;
4799 joinable_threads_unlock ();
4802 thread = (pthread_t)tid;
4803 pthread_join (thread, NULL);
4808 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4810 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4811 mono_thread_interruption_checkpoint ();
4814 static inline gboolean
4815 is_appdomainunloaded_exception (MonoClass *klass)
4817 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4819 if (!app_domain_unloaded_exception_klass)
4820 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4821 g_assert (app_domain_unloaded_exception_klass);
4823 return klass == app_domain_unloaded_exception_klass;
4826 static inline gboolean
4827 is_threadabort_exception (MonoClass *klass)
4829 return klass == mono_defaults.threadabortexception_class;
4833 mono_thread_internal_unhandled_exception (MonoObject* exc)
4835 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4836 MonoClass *klass = exc->vtable->klass;
4837 if (is_threadabort_exception (klass)) {
4838 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4839 } else if (!is_appdomainunloaded_exception (klass)) {
4840 mono_unhandled_exception (exc);
4841 if (mono_environment_exitcode_get () == 1)
4848 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4850 mono_threads_get_thread_dump (out_threads, out_stack_traces);