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 MonoCoopMutex 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;
152 /* Cleanup queue for contexts. */
153 static MonoReferenceQueue *context_queue;
156 * Threads which are starting up and they are not in the 'threads' hash yet.
157 * When handle_store is called for a thread, it will be removed from this hash table.
158 * Protected by mono_threads_lock ().
160 static MonoGHashTable *threads_starting_up = NULL;
162 /* The TLS key that holds the MonoObject assigned to each thread */
163 static MonoNativeTlsKey current_object_key;
166 /* Protected by the threads lock */
167 static GHashTable *joinable_threads;
168 static int joinable_thread_count;
170 #ifdef MONO_HAVE_FAST_TLS
171 /* we need to use both the Tls* functions and __thread because
172 * the gc needs to see all the threads
174 MONO_FAST_TLS_DECLARE(tls_current_object);
175 #define SET_CURRENT_OBJECT(x) do { \
176 MONO_FAST_TLS_SET (tls_current_object, x); \
177 mono_native_tls_set_value (current_object_key, x); \
179 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
181 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
182 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
185 /* function called at thread start */
186 static MonoThreadStartCB mono_thread_start_cb = NULL;
188 /* function called at thread attach */
189 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
191 /* function called at thread cleanup */
192 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
194 /* function called to notify the runtime about a pending exception on the current thread */
195 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
197 /* The default stack size for each thread */
198 static guint32 default_stacksize = 0;
199 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
201 static void thread_adjust_static_data (MonoInternalThread *thread);
202 static void context_adjust_static_data (MonoAppContext *ctx);
203 static void mono_free_static_data (gpointer* static_data);
204 static void mono_init_static_data_info (StaticDataInfo *static_data);
205 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
206 static gboolean mono_thread_resume (MonoInternalThread* thread);
207 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
208 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
209 static void self_suspend_internal (MonoInternalThread *thread);
211 static MonoException* mono_thread_execute_interruption ();
212 static void ref_stack_destroy (gpointer rs);
214 /* Spin lock for InterlockedXXX 64 bit functions */
215 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
216 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
217 static mono_mutex_t interlocked_mutex;
219 /* global count of thread interruptions requested */
220 static gint32 thread_interruption_requested = 0;
222 /* Event signaled when a thread changes its background mode */
223 static HANDLE background_change_event;
225 static gboolean shutting_down = FALSE;
227 static gint32 managed_thread_id_counter = 0;
230 mono_threads_lock (void)
232 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
236 mono_threads_unlock (void)
238 mono_locks_coop_release (&threads_mutex, ThreadsLock);
243 get_next_managed_thread_id (void)
245 return InterlockedIncrement (&managed_thread_id_counter);
249 mono_thread_get_tls_key (void)
251 return current_object_key;
255 mono_thread_get_tls_offset (void)
258 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
262 static inline MonoNativeThreadId
263 thread_get_tid (MonoInternalThread *thread)
265 /* We store the tid as a guint64 to keep the object layout constant between platforms */
266 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
269 /* handle_store() and handle_remove() manage the array of threads that
270 * still need to be waited for when the main thread exits.
272 * If handle_store() returns FALSE the thread must not be started
273 * because Mono is shutting down.
275 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
277 mono_threads_lock ();
279 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
281 if (threads_starting_up)
282 mono_g_hash_table_remove (threads_starting_up, thread);
284 if (shutting_down && !force_attach) {
285 mono_threads_unlock ();
290 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
291 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
294 /* We don't need to duplicate thread->handle, because it is
295 * only closed when the thread object is finalized by the GC.
297 g_assert (thread->internal_thread);
298 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
299 thread->internal_thread);
301 mono_threads_unlock ();
306 static gboolean handle_remove(MonoInternalThread *thread)
309 gsize tid = thread->tid;
311 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
313 mono_threads_lock ();
316 /* We have to check whether the thread object for the
317 * tid is still the same in the table because the
318 * thread might have been destroyed and the tid reused
319 * in the meantime, in which case the tid would be in
320 * the table, but with another thread object.
322 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
323 mono_g_hash_table_remove (threads, (gpointer)tid);
332 mono_threads_unlock ();
334 /* Don't close the handle here, wait for the object finalizer
335 * to do it. Otherwise, the following race condition applies:
337 * 1) Thread exits (and handle_remove() closes the handle)
339 * 2) Some other handle is reassigned the same slot
341 * 3) Another thread tries to join the first thread, and
342 * blocks waiting for the reassigned handle to be signalled
343 * (which might never happen). This is possible, because the
344 * thread calling Join() still has a reference to the first
350 static void ensure_synch_cs_set (MonoInternalThread *thread)
352 MonoCoopMutex *synch_cs;
354 if (thread->synch_cs != NULL) {
358 synch_cs = g_new0 (MonoCoopMutex, 1);
359 mono_coop_mutex_init_recursive (synch_cs);
361 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
362 synch_cs, NULL) != NULL) {
363 /* Another thread must have installed this CS */
364 mono_coop_mutex_destroy (synch_cs);
370 lock_thread (MonoInternalThread *thread)
372 if (!thread->synch_cs)
373 ensure_synch_cs_set (thread);
375 g_assert (thread->synch_cs);
377 mono_coop_mutex_lock (thread->synch_cs);
381 unlock_thread (MonoInternalThread *thread)
383 mono_coop_mutex_unlock (thread->synch_cs);
387 * NOTE: this function can be called also for threads different from the current one:
388 * make sure no code called from it will ever assume it is run on the thread that is
389 * getting cleaned up.
391 static void thread_cleanup (MonoInternalThread *thread)
393 g_assert (thread != NULL);
395 if (thread->abort_state_handle) {
396 mono_gchandle_free (thread->abort_state_handle);
397 thread->abort_state_handle = 0;
399 thread->abort_exc = NULL;
400 thread->current_appcontext = NULL;
403 * This is necessary because otherwise we might have
404 * cross-domain references which will not get cleaned up when
405 * the target domain is unloaded.
407 if (thread->cached_culture_info) {
409 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
410 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
414 * thread->synch_cs can be NULL if this was called after
415 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
416 * This can happen only during shutdown.
417 * The shutting_down flag is not always set, so we can't assert on it.
419 if (thread->synch_cs)
420 LOCK_THREAD (thread);
422 thread->state |= ThreadState_Stopped;
423 thread->state &= ~ThreadState_Background;
425 if (thread->synch_cs)
426 UNLOCK_THREAD (thread);
429 An interruption request has leaked to cleanup. Adjust the global counter.
431 This can happen is the abort source thread finds the abortee (this) thread
432 in unmanaged code. If this thread never trips back to managed code or check
433 the local flag it will be left set and positively unbalance the global counter.
435 Leaving the counter unbalanced will cause a performance degradation since all threads
436 will now keep checking their local flags all the time.
438 if (InterlockedExchange (&thread->interruption_requested, 0))
439 InterlockedDecrement (&thread_interruption_requested);
441 /* if the thread is not in the hash it has been removed already */
442 if (!handle_remove (thread)) {
443 if (thread == mono_thread_internal_current ()) {
444 mono_domain_unset ();
445 mono_memory_barrier ();
447 /* This needs to be called even if handle_remove () fails */
448 if (mono_thread_cleanup_fn)
449 mono_thread_cleanup_fn (thread_get_tid (thread));
452 mono_release_type_locks (thread);
454 mono_profiler_thread_end (thread->tid);
456 if (thread == mono_thread_internal_current ()) {
458 * This will signal async signal handlers that the thread has exited.
459 * The profiler callback needs this to be set, so it cannot be done earlier.
461 mono_domain_unset ();
462 mono_memory_barrier ();
465 if (thread == mono_thread_internal_current ())
466 mono_thread_pop_appdomain_ref ();
468 thread->cached_culture_info = NULL;
470 mono_free_static_data (thread->static_data);
471 thread->static_data = NULL;
472 ref_stack_destroy (thread->appdomain_refs);
473 thread->appdomain_refs = NULL;
475 if (mono_thread_cleanup_fn)
476 mono_thread_cleanup_fn (thread_get_tid (thread));
478 if (mono_gc_is_moving ()) {
479 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
480 thread->thread_pinning_ref = NULL;
486 * A special static data offset (guint32) consists of 3 parts:
488 * [0] 6-bit index into the array of chunks.
489 * [6] 25-bit offset into the array.
490 * [31] Bit indicating thread or context static.
495 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
506 } SpecialStaticOffset;
508 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
509 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
511 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
512 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
513 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
514 (((SpecialStaticOffset *) &(x))->fields.f)
517 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
519 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
521 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
522 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
524 return ((char *) thread->static_data [idx]) + off;
528 get_context_static_data (MonoAppContext *ctx, guint32 offset)
530 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
532 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
533 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
535 return ((char *) ctx->static_data [idx]) + off;
539 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
541 static MonoClassField *current_thread_field = NULL;
545 if (!current_thread_field) {
546 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
547 g_assert (current_thread_field);
550 mono_class_vtable (domain, mono_defaults.thread_class);
551 mono_domain_lock (domain);
552 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
553 mono_domain_unlock (domain);
556 return (MonoThread **)get_thread_static_data (thread, offset);
560 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
562 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
564 g_assert (current->obj.vtable->domain == domain);
566 g_assert (!*current_thread_ptr);
567 *current_thread_ptr = current;
571 create_thread_object (MonoDomain *domain)
573 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
574 return (MonoThread*)mono_gc_alloc_mature (vt);
578 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
580 MonoThread *thread = create_thread_object (domain);
581 MONO_OBJECT_SETREF (thread, internal_thread, internal);
585 static MonoInternalThread*
586 create_internal_thread (void)
588 MonoInternalThread *thread;
591 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
592 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
594 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
595 mono_coop_mutex_init_recursive (thread->synch_cs);
597 thread->apartment_state = ThreadApartmentState_Unknown;
598 thread->managed_id = get_next_managed_thread_id ();
599 if (mono_gc_is_moving ()) {
600 thread->thread_pinning_ref = thread;
601 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
608 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
610 MonoDomain *domain = mono_get_root_domain ();
612 if (!candidate || candidate->obj.vtable->domain != domain)
613 candidate = new_thread_with_internal (domain, thread);
614 set_current_thread_for_domain (domain, thread, candidate);
615 g_assert (!thread->root_domain_thread);
616 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
619 static guint32 WINAPI start_wrapper_internal(void *data)
621 MonoThreadInfo *info;
622 StartInfo *start_info = (StartInfo *)data;
623 guint32 (*start_func)(void *);
627 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
630 MonoInternalThread *internal = start_info->obj->internal_thread;
631 MonoObject *start_delegate = start_info->delegate;
632 MonoDomain *domain = start_info->obj->obj.vtable->domain;
634 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
636 /* We can be sure start_info->obj->tid and
637 * start_info->obj->handle have been set, because the thread
638 * was created suspended, and these values were set before the
642 info = mono_thread_info_current ();
644 internal->thread_info = info;
645 internal->small_id = info->small_id;
649 SET_CURRENT_OBJECT (internal);
651 /* Every thread references the appdomain which created it */
652 mono_thread_push_appdomain_ref (domain);
654 if (!mono_domain_set (domain, FALSE)) {
655 /* No point in raising an appdomain_unloaded exception here */
656 /* FIXME: Cleanup here */
657 mono_thread_pop_appdomain_ref ();
661 start_func = start_info->func;
662 start_arg = start_info->obj->start_obj;
664 start_arg = start_info->start_arg;
666 /* We have to do this here because mono_thread_new_init()
667 requires that root_domain_thread is set up. */
668 thread_adjust_static_data (internal);
669 init_root_domain_thread (internal, start_info->obj);
671 /* This MUST be called before any managed code can be
672 * executed, as it calls the callback function that (for the
673 * jit) sets the lmf marker.
675 mono_thread_new_init (tid, &tid, start_func);
676 internal->stack_ptr = &tid;
677 if (domain != mono_get_root_domain ())
678 set_current_thread_for_domain (domain, internal, start_info->obj);
680 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
682 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
684 /* On 2.0 profile (and higher), set explicitly since state might have been
686 if (internal->apartment_state == ThreadApartmentState_Unknown)
687 internal->apartment_state = ThreadApartmentState_MTA;
689 mono_thread_init_apartment_state ();
691 if(internal->start_notify!=NULL) {
692 /* Let the thread that called Start() know we're
695 ReleaseSemaphore (internal->start_notify, 1, NULL);
699 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
703 * Call this after calling start_notify, since the profiler callback might want
704 * to lock the thread, and the lock is held by thread_start () which waits for
707 mono_profiler_thread_start (tid);
709 /* if the name was set before starting, we didn't invoke the profiler callback */
710 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
711 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
712 mono_profiler_thread_name (internal->tid, tname);
715 /* start_func is set only for unmanaged start functions */
717 start_func (start_arg);
720 g_assert (start_delegate != NULL);
721 args [0] = start_arg;
722 /* we may want to handle the exception here. See comment below on unhandled exceptions */
723 mono_runtime_delegate_invoke (start_delegate, args, NULL);
726 /* If the thread calls ExitThread at all, this remaining code
727 * will not be executed, but the main thread will eventually
728 * call thread_cleanup() on this thread's behalf.
731 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
733 /* Do any cleanup needed for apartment state. This
734 * cannot be done in thread_cleanup since thread_cleanup could be
735 * called for a thread other than the current thread.
736 * mono_thread_cleanup_apartment_state cleans up apartment
737 * for the current thead */
738 mono_thread_cleanup_apartment_state ();
740 thread_cleanup (internal);
744 /* Remove the reference to the thread object in the TLS data,
745 * so the thread object can be finalized. This won't be
746 * reached if the thread threw an uncaught exception, so those
747 * thread handles will stay referenced :-( (This is due to
748 * missing support for scanning thread-specific data in the
749 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
752 SET_CURRENT_OBJECT (NULL);
757 static guint32 WINAPI start_wrapper(void *data)
761 /* Avoid scanning the frames above this frame during a GC */
762 mono_gc_set_stack_end ((void*)&dummy);
764 return start_wrapper_internal (data);
770 * Common thread creation code.
771 * LOCKING: Acquires the threads lock.
774 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
775 gboolean throw_on_failure)
777 HANDLE thread_handle;
778 MonoNativeThreadId tid;
779 guint32 create_flags;
782 * Join joinable threads to prevent running out of threads since the finalizer
783 * thread might be blocked/backlogged.
785 mono_threads_join_threads ();
787 mono_threads_lock ();
790 mono_threads_unlock ();
793 if (threads_starting_up == NULL) {
794 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
795 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
797 mono_g_hash_table_insert (threads_starting_up, thread, thread);
798 mono_threads_unlock ();
800 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
801 if (!internal->start_notify) {
802 mono_threads_lock ();
803 mono_g_hash_table_remove (threads_starting_up, thread);
804 mono_threads_unlock ();
805 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
811 stack_size = default_stacksize_for_thread (internal);
813 /* Create suspended, so we can do some housekeeping before the thread
816 create_flags = CREATE_SUSPENDED;
818 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
819 stack_size, create_flags, &tid);
821 if (thread_handle == NULL) {
822 /* The thread couldn't be created, so throw an exception */
823 mono_threads_lock ();
824 mono_g_hash_table_remove (threads_starting_up, thread);
825 mono_threads_unlock ();
827 if (throw_on_failure)
828 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
830 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
833 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
835 internal->handle = thread_handle;
836 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
838 internal->threadpool_thread = threadpool_thread;
839 if (threadpool_thread)
840 mono_thread_set_state (internal, ThreadState_Background);
842 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
844 /* Only store the handle when the thread is about to be
845 * launched, to avoid the main thread deadlocking while trying
846 * to clean up a thread that will never be signalled.
848 if (!handle_store (thread, FALSE))
851 mono_thread_info_resume (tid);
853 if (internal->start_notify) {
855 * Wait for the thread to set up its TLS data etc, so
856 * theres no potential race condition if someone tries
857 * to look up the data believing the thread has
860 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));
862 MONO_PREPARE_BLOCKING;
863 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
864 MONO_FINISH_BLOCKING;
866 CloseHandle (internal->start_notify);
867 internal->start_notify = NULL;
870 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));
875 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
877 if (mono_thread_start_cb) {
878 mono_thread_start_cb (tid, stack_start, func);
882 void mono_threads_set_default_stacksize (guint32 stacksize)
884 default_stacksize = stacksize;
887 guint32 mono_threads_get_default_stacksize (void)
889 return default_stacksize;
893 * mono_thread_create_internal:
895 * ARG should not be a GC reference.
898 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
901 MonoInternalThread *internal;
902 StartInfo *start_info;
905 thread = create_thread_object (domain);
906 internal = create_internal_thread ();
907 MONO_OBJECT_SETREF (thread, internal_thread, internal);
909 start_info = g_new0 (StartInfo, 1);
910 start_info->func = (guint32 (*)(void *))func;
911 start_info->obj = thread;
912 start_info->start_arg = arg;
914 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
918 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
919 #ifndef MONO_CROSS_COMPILE
920 if (mono_check_corlib_version () == NULL)
921 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
928 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
930 mono_thread_create_internal (domain, func, arg, FALSE, 0);
934 mono_thread_attach (MonoDomain *domain)
936 return mono_thread_attach_full (domain, FALSE);
940 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
942 MonoThreadInfo *info;
943 MonoInternalThread *thread;
944 MonoThread *current_thread;
945 HANDLE thread_handle;
946 MonoNativeThreadId tid;
948 if ((thread = mono_thread_internal_current ())) {
949 if (domain != mono_domain_get ())
950 mono_domain_set (domain, TRUE);
951 /* Already attached */
952 return mono_thread_current ();
955 if (!mono_gc_register_thread (&domain)) {
956 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 ());
959 thread = create_internal_thread ();
961 thread_handle = mono_thread_info_open_handle ();
962 g_assert (thread_handle);
964 tid=mono_native_thread_id_get ();
966 thread->handle = thread_handle;
967 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
968 thread->stack_ptr = &tid;
970 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
972 info = mono_thread_info_current ();
974 thread->thread_info = info;
975 thread->small_id = info->small_id;
977 current_thread = new_thread_with_internal (domain, thread);
979 if (!handle_store (current_thread, force_attach)) {
980 /* Mono is shutting down, so just wait for the end */
982 mono_thread_info_sleep (10000, NULL);
985 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
987 SET_CURRENT_OBJECT (thread);
988 mono_domain_set (domain, TRUE);
990 thread_adjust_static_data (thread);
992 init_root_domain_thread (thread, current_thread);
993 if (domain != mono_get_root_domain ())
994 set_current_thread_for_domain (domain, thread, current_thread);
997 if (mono_thread_attach_cb) {
1001 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1004 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1006 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1009 // FIXME: Need a separate callback
1010 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1012 return current_thread;
1016 mono_thread_detach_internal (MonoInternalThread *thread)
1018 g_return_if_fail (thread != NULL);
1020 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1022 thread_cleanup (thread);
1024 SET_CURRENT_OBJECT (NULL);
1025 mono_domain_unset ();
1027 /* Don't need to CloseHandle this thread, even though we took a
1028 * reference in mono_thread_attach (), because the GC will do it
1029 * when the Thread object is finalised.
1034 mono_thread_detach (MonoThread *thread)
1037 mono_thread_detach_internal (thread->internal_thread);
1041 * mono_thread_detach_if_exiting:
1043 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1044 * This should be used at the end of embedding code which calls into managed code, and which
1045 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1048 mono_thread_detach_if_exiting (void)
1050 if (mono_thread_info_is_exiting ()) {
1051 MonoInternalThread *thread;
1053 thread = mono_thread_internal_current ();
1055 mono_thread_detach_internal (thread);
1056 mono_thread_info_detach ();
1064 MonoInternalThread *thread = mono_thread_internal_current ();
1066 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1068 thread_cleanup (thread);
1069 SET_CURRENT_OBJECT (NULL);
1070 mono_domain_unset ();
1072 /* we could add a callback here for embedders to use. */
1073 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1074 exit (mono_environment_exitcode_get ());
1075 mono_thread_info_exit ();
1079 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1081 MonoInternalThread *internal = create_internal_thread ();
1083 internal->state = ThreadState_Unstarted;
1085 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1089 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1092 StartInfo *start_info;
1093 MonoInternalThread *internal;
1096 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1098 if (!this_obj->internal_thread)
1099 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1100 internal = this_obj->internal_thread;
1102 LOCK_THREAD (internal);
1104 if ((internal->state & ThreadState_Unstarted) == 0) {
1105 UNLOCK_THREAD (internal);
1106 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1110 if ((internal->state & ThreadState_Aborted) != 0) {
1111 UNLOCK_THREAD (internal);
1114 /* This is freed in start_wrapper */
1115 start_info = g_new0 (StartInfo, 1);
1116 start_info->func = NULL;
1117 start_info->start_arg = NULL;
1118 start_info->delegate = start;
1119 start_info->obj = this_obj;
1120 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1122 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1124 UNLOCK_THREAD (internal);
1128 internal->state &= ~ThreadState_Unstarted;
1130 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1132 UNLOCK_THREAD (internal);
1133 return internal->handle;
1137 * This is called from the finalizer of the internal thread object.
1140 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1142 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1145 * Since threads keep a reference to their thread object while running, by the time this function is called,
1146 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1147 * when thread_cleanup () can be called after this.
1150 CloseHandle (thread);
1152 if (this_obj->synch_cs) {
1153 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1154 this_obj->synch_cs = NULL;
1155 mono_coop_mutex_destroy (synch_cs);
1159 if (this_obj->name) {
1160 void *name = this_obj->name;
1161 this_obj->name = NULL;
1167 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1170 MonoInternalThread *thread = mono_thread_internal_current ();
1172 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1174 mono_thread_current_check_pending_interrupt ();
1177 gboolean alerted = FALSE;
1179 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1181 res = mono_thread_info_sleep (ms, &alerted);
1183 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1186 MonoException* exc = mono_thread_execute_interruption ();
1188 mono_raise_exception (exc);
1200 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1205 ves_icall_System_Threading_Thread_GetDomainID (void)
1207 return mono_domain_get()->domain_id;
1211 ves_icall_System_Threading_Thread_Yield (void)
1213 return mono_thread_info_yield ();
1217 * mono_thread_get_name:
1219 * Return the name of the thread. NAME_LEN is set to the length of the name.
1220 * Return NULL if the thread has no name. The returned memory is owned by the
1224 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1228 LOCK_THREAD (this_obj);
1230 if (!this_obj->name) {
1234 *name_len = this_obj->name_len;
1235 res = g_new (gunichar2, this_obj->name_len);
1236 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1239 UNLOCK_THREAD (this_obj);
1245 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1249 LOCK_THREAD (this_obj);
1251 if (!this_obj->name)
1254 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1256 UNLOCK_THREAD (this_obj);
1262 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1264 LOCK_THREAD (this_obj);
1266 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1267 UNLOCK_THREAD (this_obj);
1269 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1272 if (this_obj->name) {
1273 g_free (this_obj->name);
1274 this_obj->name_len = 0;
1277 this_obj->name = g_new (gunichar2, mono_string_length (name));
1278 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1279 this_obj->name_len = mono_string_length (name);
1282 this_obj->name = NULL;
1285 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1287 UNLOCK_THREAD (this_obj);
1289 if (this_obj->name && this_obj->tid) {
1290 char *tname = mono_string_to_utf8 (name);
1291 mono_profiler_thread_name (this_obj->tid, tname);
1292 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1298 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1300 mono_thread_set_name_internal (this_obj, name, TRUE);
1304 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1306 return ThreadPriority_Lowest;
1310 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1314 /* If the array is already in the requested domain, we just return it,
1315 otherwise we return a copy in that domain. */
1317 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1324 if (mono_object_domain (arr) == domain)
1327 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1328 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1333 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1335 return byte_array_to_domain (arr, mono_get_root_domain ());
1339 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1341 return byte_array_to_domain (arr, mono_domain_get ());
1345 mono_thread_current (void)
1347 MonoDomain *domain = mono_domain_get ();
1348 MonoInternalThread *internal = mono_thread_internal_current ();
1349 MonoThread **current_thread_ptr;
1351 g_assert (internal);
1352 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1354 if (!*current_thread_ptr) {
1355 g_assert (domain != mono_get_root_domain ());
1356 *current_thread_ptr = new_thread_with_internal (domain, internal);
1358 return *current_thread_ptr;
1361 /* Return the thread object belonging to INTERNAL in the current domain */
1363 mono_thread_current_for_thread (MonoInternalThread *internal)
1365 MonoDomain *domain = mono_domain_get ();
1366 MonoThread **current_thread_ptr;
1368 g_assert (internal);
1369 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1371 if (!*current_thread_ptr) {
1372 g_assert (domain != mono_get_root_domain ());
1373 *current_thread_ptr = new_thread_with_internal (domain, internal);
1375 return *current_thread_ptr;
1379 mono_thread_internal_current (void)
1381 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1382 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1387 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1389 MonoInternalThread *thread = this_obj->internal_thread;
1390 HANDLE handle = thread->handle;
1391 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1394 mono_thread_current_check_pending_interrupt ();
1396 LOCK_THREAD (thread);
1398 if ((thread->state & ThreadState_Unstarted) != 0) {
1399 UNLOCK_THREAD (thread);
1401 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1405 UNLOCK_THREAD (thread);
1410 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1412 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1414 MONO_PREPARE_BLOCKING;
1415 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1416 MONO_FINISH_BLOCKING;
1418 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1420 if(ret==WAIT_OBJECT_0) {
1421 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1426 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1432 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1440 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1442 MONO_PREPARE_BLOCKING;
1444 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1446 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1447 MONO_FINISH_BLOCKING;
1449 if (ret != WAIT_IO_COMPLETION)
1452 exc = mono_thread_execute_interruption ();
1454 mono_raise_exception (exc);
1459 /* Re-calculate ms according to the time passed */
1460 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1461 if (diff_ms >= ms) {
1465 wait = ms - diff_ms;
1471 /* FIXME: exitContext isnt documented */
1472 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1478 MonoObject *waitHandle;
1479 MonoInternalThread *thread = mono_thread_internal_current ();
1481 /* Do this WaitSleepJoin check before creating objects */
1482 mono_thread_current_check_pending_interrupt ();
1484 /* We fail in managed if the array has more than 64 elements */
1485 numhandles = (guint32)mono_array_length(mono_handles);
1486 handles = g_new0(HANDLE, numhandles);
1488 for(i = 0; i < numhandles; i++) {
1489 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1490 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1497 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1499 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1501 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1505 if(ret==WAIT_FAILED) {
1506 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1508 } else if(ret==WAIT_TIMEOUT) {
1509 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1516 /* FIXME: exitContext isnt documented */
1517 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1519 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1520 uintptr_t numhandles;
1523 MonoObject *waitHandle;
1524 MonoInternalThread *thread = mono_thread_internal_current ();
1526 /* Do this WaitSleepJoin check before creating objects */
1527 mono_thread_current_check_pending_interrupt ();
1529 numhandles = mono_array_length(mono_handles);
1530 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1533 for(i = 0; i < numhandles; i++) {
1534 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1535 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1542 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1544 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1546 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1548 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1551 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1553 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1554 return ret - WAIT_OBJECT_0;
1556 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1557 return ret - WAIT_ABANDONED_0;
1564 /* FIXME: exitContext isnt documented */
1565 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1568 MonoInternalThread *thread = mono_thread_internal_current ();
1570 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1576 mono_thread_current_check_pending_interrupt ();
1578 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1580 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1582 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1584 if(ret==WAIT_FAILED) {
1585 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1587 } else if(ret==WAIT_TIMEOUT) {
1588 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1596 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1599 MonoInternalThread *thread = mono_thread_internal_current ();
1604 mono_thread_current_check_pending_interrupt ();
1606 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1608 MONO_PREPARE_BLOCKING;
1609 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1610 MONO_FINISH_BLOCKING;
1612 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1614 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1617 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1624 mutex = CreateMutex (NULL, owned, NULL);
1626 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1628 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1636 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1637 return(ReleaseMutex (handle));
1640 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1646 *error = ERROR_SUCCESS;
1648 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1650 *error = GetLastError ();
1657 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1664 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1666 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1667 mono_string_chars (name));
1669 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1677 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1681 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1686 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1690 *error = ERROR_SUCCESS;
1692 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1694 *error = GetLastError ();
1700 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1707 event = CreateEvent (NULL, manual, initial, NULL);
1709 event = CreateEvent (NULL, manual, initial,
1710 mono_string_chars (name));
1712 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1720 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1721 return (SetEvent(handle));
1724 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1725 return (ResetEvent(handle));
1729 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1730 CloseHandle (handle);
1733 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1739 *error = ERROR_SUCCESS;
1741 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1743 *error = GetLastError ();
1749 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1751 return InterlockedIncrement (location);
1754 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1756 #if SIZEOF_VOID_P == 4
1757 if (G_UNLIKELY ((size_t)location & 0x7)) {
1759 mono_interlocked_lock ();
1762 mono_interlocked_unlock ();
1766 return InterlockedIncrement64 (location);
1769 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1771 return InterlockedDecrement(location);
1774 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1776 #if SIZEOF_VOID_P == 4
1777 if (G_UNLIKELY ((size_t)location & 0x7)) {
1779 mono_interlocked_lock ();
1782 mono_interlocked_unlock ();
1786 return InterlockedDecrement64 (location);
1789 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1791 return InterlockedExchange(location, value);
1794 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1797 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1798 mono_gc_wbarrier_generic_nostore (location);
1802 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1804 return InterlockedExchangePointer(location, value);
1807 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1809 IntFloatUnion val, ret;
1812 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1818 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1820 #if SIZEOF_VOID_P == 4
1821 if (G_UNLIKELY ((size_t)location & 0x7)) {
1823 mono_interlocked_lock ();
1826 mono_interlocked_unlock ();
1830 return InterlockedExchange64 (location, value);
1834 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1836 LongDoubleUnion val, ret;
1839 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1844 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1846 return InterlockedCompareExchange(location, value, comparand);
1849 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1851 gint32 r = InterlockedCompareExchange(location, value, comparand);
1852 *success = r == comparand;
1856 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1859 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1860 mono_gc_wbarrier_generic_nostore (location);
1864 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1866 return InterlockedCompareExchangePointer(location, value, comparand);
1869 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1871 IntFloatUnion val, ret, cmp;
1874 cmp.fval = comparand;
1875 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1881 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1883 #if SIZEOF_VOID_P == 8
1884 LongDoubleUnion val, comp, ret;
1887 comp.fval = comparand;
1888 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1894 mono_interlocked_lock ();
1896 if (old == comparand)
1898 mono_interlocked_unlock ();
1905 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1907 #if SIZEOF_VOID_P == 4
1908 if (G_UNLIKELY ((size_t)location & 0x7)) {
1910 mono_interlocked_lock ();
1912 if (old == comparand)
1914 mono_interlocked_unlock ();
1918 return InterlockedCompareExchange64 (location, value, comparand);
1922 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1925 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
1926 mono_gc_wbarrier_generic_nostore (location);
1931 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1934 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
1935 mono_gc_wbarrier_generic_nostore (location);
1940 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1942 return InterlockedAdd (location, value);
1946 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1948 #if SIZEOF_VOID_P == 4
1949 if (G_UNLIKELY ((size_t)location & 0x7)) {
1951 mono_interlocked_lock ();
1954 mono_interlocked_unlock ();
1958 return InterlockedAdd64 (location, value);
1962 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1964 #if SIZEOF_VOID_P == 4
1965 if (G_UNLIKELY ((size_t)location & 0x7)) {
1967 mono_interlocked_lock ();
1969 mono_interlocked_unlock ();
1973 return InterlockedRead64 (location);
1977 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1979 mono_memory_barrier ();
1983 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
1985 mono_thread_clr_state (this_obj, (MonoThreadState)state);
1987 if (state & ThreadState_Background) {
1988 /* If the thread changes the background mode, the main thread has to
1989 * be notified, since it has to rebuild the list of threads to
1992 SetEvent (background_change_event);
1997 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
1999 mono_thread_set_state (this_obj, (MonoThreadState)state);
2001 if (state & ThreadState_Background) {
2002 /* If the thread changes the background mode, the main thread has to
2003 * be notified, since it has to rebuild the list of threads to
2006 SetEvent (background_change_event);
2011 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2015 LOCK_THREAD (this_obj);
2017 state = this_obj->state;
2019 UNLOCK_THREAD (this_obj);
2024 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2026 MonoInternalThread *current;
2028 MonoInternalThread *thread = this_obj->internal_thread;
2030 LOCK_THREAD (thread);
2032 current = mono_thread_internal_current ();
2034 thread->thread_interrupt_requested = TRUE;
2035 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2037 UNLOCK_THREAD (thread);
2040 abort_thread_internal (thread, TRUE, FALSE);
2044 void mono_thread_current_check_pending_interrupt ()
2046 MonoInternalThread *thread = mono_thread_internal_current ();
2047 gboolean throw_ = FALSE;
2049 LOCK_THREAD (thread);
2051 if (thread->thread_interrupt_requested) {
2053 thread->thread_interrupt_requested = FALSE;
2056 UNLOCK_THREAD (thread);
2059 mono_raise_exception (mono_get_exception_thread_interrupted ());
2064 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2066 LOCK_THREAD (thread);
2068 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2069 (thread->state & ThreadState_StopRequested) != 0 ||
2070 (thread->state & ThreadState_Stopped) != 0)
2072 UNLOCK_THREAD (thread);
2076 if ((thread->state & ThreadState_Unstarted) != 0) {
2077 thread->state |= ThreadState_Aborted;
2078 UNLOCK_THREAD (thread);
2082 thread->state |= ThreadState_AbortRequested;
2083 if (thread->abort_state_handle)
2084 mono_gchandle_free (thread->abort_state_handle);
2086 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2087 g_assert (thread->abort_state_handle);
2089 thread->abort_state_handle = 0;
2091 thread->abort_exc = NULL;
2093 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));
2095 /* During shutdown, we can't wait for other threads */
2097 /* Make sure the thread is awake */
2098 mono_thread_resume (thread);
2100 UNLOCK_THREAD (thread);
2102 abort_thread_internal (thread, TRUE, TRUE);
2106 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2108 MonoInternalThread *thread = mono_thread_internal_current ();
2109 gboolean was_aborting;
2111 LOCK_THREAD (thread);
2112 was_aborting = thread->state & ThreadState_AbortRequested;
2113 thread->state &= ~ThreadState_AbortRequested;
2114 UNLOCK_THREAD (thread);
2116 if (!was_aborting) {
2117 const char *msg = "Unable to reset abort because no abort was requested";
2118 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2121 thread->abort_exc = NULL;
2122 if (thread->abort_state_handle) {
2123 mono_gchandle_free (thread->abort_state_handle);
2124 /* This is actually not necessary - the handle
2125 only counts if the exception is set */
2126 thread->abort_state_handle = 0;
2131 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2133 LOCK_THREAD (thread);
2135 thread->state &= ~ThreadState_AbortRequested;
2137 if (thread->abort_exc) {
2138 thread->abort_exc = NULL;
2139 if (thread->abort_state_handle) {
2140 mono_gchandle_free (thread->abort_state_handle);
2141 /* This is actually not necessary - the handle
2142 only counts if the exception is set */
2143 thread->abort_state_handle = 0;
2147 UNLOCK_THREAD (thread);
2151 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2153 MonoInternalThread *thread = this_obj->internal_thread;
2154 MonoObject *state, *deserialized = NULL, *exc;
2157 if (!thread->abort_state_handle)
2160 state = mono_gchandle_get_target (thread->abort_state_handle);
2163 domain = mono_domain_get ();
2164 if (mono_object_domain (state) == domain)
2167 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2169 if (!deserialized) {
2170 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2172 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2173 mono_set_pending_exception (invalid_op_exc);
2177 return deserialized;
2181 mono_thread_suspend (MonoInternalThread *thread)
2183 LOCK_THREAD (thread);
2185 if ((thread->state & ThreadState_Unstarted) != 0 ||
2186 (thread->state & ThreadState_Aborted) != 0 ||
2187 (thread->state & ThreadState_Stopped) != 0)
2189 UNLOCK_THREAD (thread);
2193 if ((thread->state & ThreadState_Suspended) != 0 ||
2194 (thread->state & ThreadState_SuspendRequested) != 0 ||
2195 (thread->state & ThreadState_StopRequested) != 0)
2197 UNLOCK_THREAD (thread);
2201 thread->state |= ThreadState_SuspendRequested;
2203 UNLOCK_THREAD (thread);
2205 suspend_thread_internal (thread, FALSE);
2210 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2212 if (!mono_thread_suspend (this_obj->internal_thread)) {
2213 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2218 /* LOCKING: LOCK_THREAD(thread) must be held */
2220 mono_thread_resume (MonoInternalThread *thread)
2222 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2223 thread->state &= ~ThreadState_SuspendRequested;
2227 if ((thread->state & ThreadState_Suspended) == 0 ||
2228 (thread->state & ThreadState_Unstarted) != 0 ||
2229 (thread->state & ThreadState_Aborted) != 0 ||
2230 (thread->state & ThreadState_Stopped) != 0)
2235 UNLOCK_THREAD (thread);
2237 /* Awake the thread */
2238 if (!mono_thread_info_resume (thread_get_tid (thread)))
2241 LOCK_THREAD (thread);
2243 thread->state &= ~ThreadState_Suspended;
2249 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2251 if (!thread->internal_thread) {
2252 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2254 LOCK_THREAD (thread->internal_thread);
2255 if (!mono_thread_resume (thread->internal_thread))
2256 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2257 UNLOCK_THREAD (thread->internal_thread);
2262 mono_threads_is_critical_method (MonoMethod *method)
2264 switch (method->wrapper_type) {
2265 case MONO_WRAPPER_RUNTIME_INVOKE:
2266 case MONO_WRAPPER_XDOMAIN_INVOKE:
2267 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2274 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2279 if (mono_threads_is_critical_method (m)) {
2280 *((gboolean*)data) = TRUE;
2287 is_running_protected_wrapper (void)
2289 gboolean found = FALSE;
2290 mono_stack_walk (find_wrapper, &found);
2294 void mono_thread_internal_stop (MonoInternalThread *thread)
2296 LOCK_THREAD (thread);
2298 if ((thread->state & ThreadState_StopRequested) != 0 ||
2299 (thread->state & ThreadState_Stopped) != 0)
2301 UNLOCK_THREAD (thread);
2305 /* Make sure the thread is awake */
2306 mono_thread_resume (thread);
2308 thread->state |= ThreadState_StopRequested;
2309 thread->state &= ~ThreadState_AbortRequested;
2311 UNLOCK_THREAD (thread);
2313 abort_thread_internal (thread, TRUE, TRUE);
2316 void mono_thread_stop (MonoThread *thread)
2318 mono_thread_internal_stop (thread->internal_thread);
2322 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2325 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2330 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2333 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2338 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2341 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2346 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2349 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2354 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2357 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2358 return (void *) tmp;
2362 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2364 volatile MonoObject *tmp;
2365 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2366 return (MonoObject *) tmp;
2370 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2373 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2378 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2381 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2386 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2388 return InterlockedRead8 ((volatile gint8 *)ptr);
2392 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2394 return InterlockedRead16 ((volatile gint16 *)ptr);
2398 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2400 return InterlockedRead ((volatile gint32 *)ptr);
2404 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2406 #if SIZEOF_VOID_P == 4
2407 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2409 mono_interlocked_lock ();
2410 val = *(gint64*)ptr;
2411 mono_interlocked_unlock ();
2415 return InterlockedRead64 ((volatile gint64 *)ptr);
2419 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2421 return InterlockedReadPointer ((volatile gpointer *)ptr);
2425 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2429 #if SIZEOF_VOID_P == 4
2430 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2432 mono_interlocked_lock ();
2433 val = *(double*)ptr;
2434 mono_interlocked_unlock ();
2439 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2445 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2449 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2455 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2457 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2461 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2463 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2467 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2469 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2473 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2475 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2479 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2481 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2485 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2487 mono_atomic_store_release ((volatile void **) ptr, value);
2491 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2493 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2497 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2499 mono_atomic_store_release ((volatile double *) ptr, value);
2503 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2505 mono_atomic_store_release ((volatile float *) ptr, value);
2509 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2511 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2515 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2517 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2521 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2523 InterlockedWrite ((volatile gint32 *)ptr, value);
2527 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2529 #if SIZEOF_VOID_P == 4
2530 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2531 mono_interlocked_lock ();
2532 *(gint64*)ptr = value;
2533 mono_interlocked_unlock ();
2538 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2542 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2544 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2548 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2552 #if SIZEOF_VOID_P == 4
2553 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2554 mono_interlocked_lock ();
2555 *(double*)ptr = value;
2556 mono_interlocked_unlock ();
2563 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2567 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2573 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2577 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2579 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2583 free_context (void *user_data)
2585 ContextStaticData *data = user_data;
2587 mono_threads_lock ();
2590 * There is no guarantee that, by the point this reference queue callback
2591 * has been invoked, the GC handle associated with the object will fail to
2592 * resolve as one might expect. So if we don't free and remove the GC
2593 * handle here, free_context_static_data_helper () could end up resolving
2594 * a GC handle to an actually-dead context which would contain a pointer
2595 * to an already-freed static data segment, resulting in a crash when
2598 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2600 mono_threads_unlock ();
2602 mono_gchandle_free (data->gc_handle);
2603 mono_free_static_data (data->static_data);
2608 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2610 mono_threads_lock ();
2612 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2615 contexts = g_hash_table_new (NULL, NULL);
2618 context_queue = mono_gc_reference_queue_new (free_context);
2620 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2621 g_hash_table_insert (contexts, gch, gch);
2624 * We use this intermediate structure to contain a duplicate pointer to
2625 * the static data because we can't rely on being able to resolve the GC
2626 * handle in the reference queue callback.
2628 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2629 data->gc_handle = GPOINTER_TO_UINT (gch);
2632 context_adjust_static_data (ctx);
2633 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2635 mono_threads_unlock ();
2637 mono_profiler_context_loaded (ctx);
2641 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2644 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2645 * cleanup in exceptional circumstances, we don't actually do any
2646 * cleanup work here. We instead do this via a reference queue.
2649 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2651 mono_profiler_context_unloaded (ctx);
2655 mono_thread_init_tls (void)
2657 MONO_FAST_TLS_INIT (tls_current_object);
2658 mono_native_tls_alloc (¤t_object_key, NULL);
2661 void mono_thread_init (MonoThreadStartCB start_cb,
2662 MonoThreadAttachCB attach_cb)
2664 mono_coop_mutex_init_recursive (&threads_mutex);
2666 mono_os_mutex_init_recursive(&interlocked_mutex);
2667 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2669 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2670 g_assert(background_change_event != NULL);
2672 mono_init_static_data_info (&thread_static_info);
2673 mono_init_static_data_info (&context_static_info);
2675 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2677 mono_thread_start_cb = start_cb;
2678 mono_thread_attach_cb = attach_cb;
2680 /* Get a pseudo handle to the current process. This is just a
2681 * kludge so that wapi can build a process handle if needed.
2682 * As a pseudo handle is returned, we don't need to clean
2685 GetCurrentProcess ();
2688 void mono_thread_cleanup (void)
2690 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2691 MonoThreadInfo *info;
2693 /* The main thread must abandon any held mutexes (particularly
2694 * important for named mutexes as they are shared across
2695 * processes, see bug 74680.) This will happen when the
2696 * thread exits, but if it's not running in a subthread it
2697 * won't exit in time.
2699 info = mono_thread_info_current ();
2700 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2704 /* This stuff needs more testing, it seems one of these
2705 * critical sections can be locked when mono_thread_cleanup is
2708 mono_coop_mutex_destroy (&threads_mutex);
2709 mono_os_mutex_destroy (&interlocked_mutex);
2710 mono_os_mutex_destroy (&delayed_free_table_mutex);
2711 mono_os_mutex_destroy (&small_id_mutex);
2712 CloseHandle (background_change_event);
2715 mono_native_tls_free (current_object_key);
2719 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2721 mono_thread_cleanup_fn = func;
2725 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2727 thread->internal_thread->manage_callback = func;
2730 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2732 mono_thread_notify_pending_exc_fn = func;
2736 static void print_tids (gpointer key, gpointer value, gpointer user)
2738 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2739 * sizeof(uint) and a cast to uint would overflow
2741 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2742 * print this as a pointer.
2744 g_message ("Waiting for: %p", key);
2749 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2750 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2754 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2758 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2760 MONO_PREPARE_BLOCKING;
2761 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2762 MONO_FINISH_BLOCKING;
2764 if(ret==WAIT_FAILED) {
2765 /* See the comment in build_wait_tids() */
2766 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2770 for(i=0; i<wait->num; i++)
2771 CloseHandle (wait->handles[i]);
2773 if (ret == WAIT_TIMEOUT)
2776 for(i=0; i<wait->num; i++) {
2777 gsize tid = wait->threads[i]->tid;
2780 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2781 * it can still run io-layer etc. code. So wait for it to really exit.
2782 * FIXME: This won't join threads which are not in the joinable_hash yet.
2784 mono_thread_join ((gpointer)tid);
2786 mono_threads_lock ();
2787 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2788 /* This thread must have been killed, because
2789 * it hasn't cleaned itself up. (It's just
2790 * possible that the thread exited before the
2791 * parent thread had a chance to store the
2792 * handle, and now there is another pointer to
2793 * the already-exited thread stored. In this
2794 * case, we'll just get two
2795 * mono_profiler_thread_end() calls for the
2799 mono_threads_unlock ();
2800 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2801 thread_cleanup (wait->threads[i]);
2803 mono_threads_unlock ();
2808 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2810 guint32 i, ret, count;
2812 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2814 /* Add the thread state change event, so it wakes up if a thread changes
2815 * to background mode.
2818 if (count < MAXIMUM_WAIT_OBJECTS) {
2819 wait->handles [count] = background_change_event;
2823 MONO_PREPARE_BLOCKING;
2824 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2825 MONO_FINISH_BLOCKING;
2827 if(ret==WAIT_FAILED) {
2828 /* See the comment in build_wait_tids() */
2829 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2833 for(i=0; i<wait->num; i++)
2834 CloseHandle (wait->handles[i]);
2836 if (ret == WAIT_TIMEOUT)
2839 if (ret < wait->num) {
2840 gsize tid = wait->threads[ret]->tid;
2841 mono_threads_lock ();
2842 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2843 /* See comment in wait_for_tids about thread cleanup */
2844 mono_threads_unlock ();
2845 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2846 thread_cleanup (wait->threads [ret]);
2848 mono_threads_unlock ();
2852 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2854 struct wait_data *wait=(struct wait_data *)user;
2856 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2858 MonoInternalThread *thread=(MonoInternalThread *)value;
2860 /* Ignore background threads, we abort them later */
2861 /* Do not lock here since it is not needed and the caller holds threads_lock */
2862 if (thread->state & ThreadState_Background) {
2863 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2864 return; /* just leave, ignore */
2867 if (mono_gc_is_finalizer_internal_thread (thread)) {
2868 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2872 if (thread == mono_thread_internal_current ()) {
2873 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2877 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2878 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2882 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2883 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2887 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2888 if (handle == NULL) {
2889 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2893 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2894 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2895 wait->handles[wait->num]=handle;
2896 wait->threads[wait->num]=thread;
2899 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2901 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2906 /* Just ignore the rest, we can't do anything with
2913 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2915 struct wait_data *wait=(struct wait_data *)user;
2916 MonoNativeThreadId self = mono_native_thread_id_get ();
2917 MonoInternalThread *thread = (MonoInternalThread *)value;
2920 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2923 /* The finalizer thread is not a background thread */
2924 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
2925 && (thread->state & ThreadState_Background) != 0
2926 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
2928 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2932 /* printf ("A: %d\n", wait->num); */
2933 wait->handles[wait->num]=thread->handle;
2934 wait->threads[wait->num]=thread;
2937 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2938 mono_thread_internal_stop (thread);
2942 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
2943 && !mono_gc_is_finalizer_internal_thread (thread);
2947 * mono_threads_set_shutting_down:
2949 * Is called by a thread that wants to shut down Mono. If the runtime is already
2950 * shutting down, the calling thread is suspended/stopped, and this function never
2954 mono_threads_set_shutting_down (void)
2956 MonoInternalThread *current_thread = mono_thread_internal_current ();
2958 mono_threads_lock ();
2960 if (shutting_down) {
2961 mono_threads_unlock ();
2963 /* Make sure we're properly suspended/stopped */
2965 LOCK_THREAD (current_thread);
2967 if ((current_thread->state & ThreadState_SuspendRequested) ||
2968 (current_thread->state & ThreadState_AbortRequested) ||
2969 (current_thread->state & ThreadState_StopRequested)) {
2970 UNLOCK_THREAD (current_thread);
2971 mono_thread_execute_interruption ();
2973 current_thread->state |= ThreadState_Stopped;
2974 UNLOCK_THREAD (current_thread);
2977 /*since we're killing the thread, unset the current domain.*/
2978 mono_domain_unset ();
2980 /* Wake up other threads potentially waiting for us */
2981 mono_thread_info_exit ();
2983 shutting_down = TRUE;
2985 /* Not really a background state change, but this will
2986 * interrupt the main thread if it is waiting for all
2987 * the other threads.
2989 SetEvent (background_change_event);
2991 mono_threads_unlock ();
2995 void mono_thread_manage (void)
2997 struct wait_data wait_data;
2998 struct wait_data *wait = &wait_data;
3000 memset (wait, 0, sizeof (struct wait_data));
3001 /* join each thread that's still running */
3002 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3004 mono_threads_lock ();
3006 THREAD_DEBUG (g_message("%s: No threads", __func__));
3007 mono_threads_unlock ();
3010 mono_threads_unlock ();
3013 mono_threads_lock ();
3014 if (shutting_down) {
3015 /* somebody else is shutting down */
3016 mono_threads_unlock ();
3019 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3020 mono_g_hash_table_foreach (threads, print_tids, NULL));
3022 ResetEvent (background_change_event);
3024 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3025 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3026 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3027 mono_threads_unlock ();
3029 /* Something to wait for */
3030 wait_for_tids_or_state_change (wait, INFINITE);
3032 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3033 } while(wait->num>0);
3035 /* Mono is shutting down, so just wait for the end */
3036 if (!mono_runtime_try_shutdown ()) {
3037 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3038 mono_thread_suspend (mono_thread_internal_current ());
3039 mono_thread_execute_interruption ();
3043 * Remove everything but the finalizer thread and self.
3044 * Also abort all the background threads
3047 mono_threads_lock ();
3050 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3051 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3052 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3054 mono_threads_unlock ();
3056 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3058 /* Something to wait for */
3059 wait_for_tids (wait, INFINITE);
3061 } while (wait->num > 0);
3064 * give the subthreads a chance to really quit (this is mainly needed
3065 * to get correct user and system times from getrusage/wait/time(1)).
3066 * This could be removed if we avoid pthread_detach() and use pthread_join().
3068 mono_thread_info_yield ();
3072 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3074 MonoInternalThread *thread = (MonoInternalThread*)value;
3075 struct wait_data *wait = (struct wait_data*)user_data;
3079 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3081 * This needs no locking.
3083 if ((thread->state & ThreadState_Suspended) != 0 ||
3084 (thread->state & ThreadState_Stopped) != 0)
3087 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3088 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3092 wait->handles [wait->num] = handle;
3093 wait->threads [wait->num] = thread;
3099 * mono_thread_suspend_all_other_threads:
3101 * Suspend all managed threads except the finalizer thread and this thread. It is
3102 * not possible to resume them later.
3104 void mono_thread_suspend_all_other_threads (void)
3106 struct wait_data wait_data;
3107 struct wait_data *wait = &wait_data;
3109 MonoNativeThreadId self = mono_native_thread_id_get ();
3110 guint32 eventidx = 0;
3111 gboolean starting, finished;
3113 memset (wait, 0, sizeof (struct wait_data));
3115 * The other threads could be in an arbitrary state at this point, i.e.
3116 * they could be starting up, shutting down etc. This means that there could be
3117 * threads which are not even in the threads hash table yet.
3121 * First we set a barrier which will be checked by all threads before they
3122 * are added to the threads hash table, and they will exit if the flag is set.
3123 * This ensures that no threads could be added to the hash later.
3124 * We will use shutting_down as the barrier for now.
3126 g_assert (shutting_down);
3129 * We make multiple calls to WaitForMultipleObjects since:
3130 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3131 * - some threads could exit without becoming suspended
3136 * Make a copy of the hashtable since we can't do anything with
3137 * threads while threads_mutex is held.
3140 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3141 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3142 mono_threads_lock ();
3143 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3144 mono_threads_unlock ();
3147 /* Get the suspended events that we'll be waiting for */
3148 for (i = 0; i < wait->num; ++i) {
3149 MonoInternalThread *thread = wait->threads [i];
3151 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3152 || mono_gc_is_finalizer_internal_thread (thread)
3153 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3155 //CloseHandle (wait->handles [i]);
3156 wait->threads [i] = NULL; /* ignore this thread in next loop */
3160 LOCK_THREAD (thread);
3162 if ((thread->state & ThreadState_Suspended) != 0 ||
3163 (thread->state & ThreadState_StopRequested) != 0 ||
3164 (thread->state & ThreadState_Stopped) != 0) {
3165 UNLOCK_THREAD (thread);
3166 CloseHandle (wait->handles [i]);
3167 wait->threads [i] = NULL; /* ignore this thread in next loop */
3173 /* Convert abort requests into suspend requests */
3174 if ((thread->state & ThreadState_AbortRequested) != 0)
3175 thread->state &= ~ThreadState_AbortRequested;
3177 thread->state |= ThreadState_SuspendRequested;
3179 UNLOCK_THREAD (thread);
3181 /* Signal the thread to suspend */
3182 suspend_thread_internal (thread, TRUE);
3184 if (eventidx <= 0) {
3186 * If there are threads which are starting up, we wait until they
3187 * are suspended when they try to register in the threads hash.
3188 * This is guaranteed to finish, since the threads which can create new
3189 * threads get suspended after a while.
3190 * FIXME: The finalizer thread can still create new threads.
3192 mono_threads_lock ();
3193 if (threads_starting_up)
3194 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3197 mono_threads_unlock ();
3199 mono_thread_info_sleep (100, NULL);
3207 MonoInternalThread *thread;
3208 MonoStackFrameInfo *frames;
3209 int nframes, max_frames;
3210 int nthreads, max_threads;
3211 MonoInternalThread **threads;
3212 } ThreadDumpUserData;
3214 static gboolean thread_dump_requested;
3216 /* This needs to be async safe */
3218 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3220 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3222 if (ud->nframes < ud->max_frames) {
3223 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3230 /* This needs to be async safe */
3231 static SuspendThreadResult
3232 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3234 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3235 MonoInternalThread *thread = user_data->thread;
3238 /* This no longer works with remote unwinding */
3240 wapi_desc = wapi_current_thread_desc ();
3241 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3246 if (thread == mono_thread_internal_current ())
3247 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3249 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3251 return MonoResumeThread;
3255 int nthreads, max_threads;
3256 MonoInternalThread **threads;
3257 } CollectThreadsUserData;
3260 collect_thread (gpointer key, gpointer value, gpointer user)
3262 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3263 MonoInternalThread *thread = (MonoInternalThread *)value;
3265 if (ud->nthreads < ud->max_threads)
3266 ud->threads [ud->nthreads ++] = thread;
3270 * Collect running threads into the THREADS array.
3271 * THREADS should be an array allocated on the stack.
3274 collect_threads (MonoInternalThread **thread_array, int max_threads)
3276 CollectThreadsUserData ud;
3278 memset (&ud, 0, sizeof (ud));
3279 /* This array contains refs, but its on the stack, so its ok */
3280 ud.threads = thread_array;
3281 ud.max_threads = max_threads;
3283 mono_threads_lock ();
3284 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3285 mono_threads_unlock ();
3291 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3293 GString* text = g_string_new (0);
3295 GError *error = NULL;
3298 ud->thread = thread;
3301 /* Collect frames for the thread */
3302 if (thread == mono_thread_internal_current ()) {
3303 get_thread_dump (mono_thread_info_current (), ud);
3305 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3309 * Do all the non async-safe work outside of get_thread_dump.
3312 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3314 g_string_append_printf (text, "\n\"%s\"", name);
3317 else if (thread->threadpool_thread) {
3318 g_string_append (text, "\n\"<threadpool thread>\"");
3320 g_string_append (text, "\n\"<unnamed thread>\"");
3323 for (i = 0; i < ud->nframes; ++i) {
3324 MonoStackFrameInfo *frame = &ud->frames [i];
3325 MonoMethod *method = NULL;
3327 if (frame->type == FRAME_TYPE_MANAGED)
3328 method = mono_jit_info_get_method (frame->ji);
3331 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3332 g_string_append_printf (text, " %s\n", location);
3335 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3339 fprintf (stdout, "%s", text->str);
3341 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3342 OutputDebugStringA(text->str);
3345 g_string_free (text, TRUE);
3350 mono_threads_perform_thread_dump (void)
3352 ThreadDumpUserData ud;
3353 MonoInternalThread *thread_array [128];
3354 int tindex, nthreads;
3356 if (!thread_dump_requested)
3359 printf ("Full thread dump:\n");
3361 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3362 nthreads = collect_threads (thread_array, 128);
3364 memset (&ud, 0, sizeof (ud));
3365 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3366 ud.max_frames = 256;
3368 for (tindex = 0; tindex < nthreads; ++tindex)
3369 dump_thread (thread_array [tindex], &ud);
3373 thread_dump_requested = FALSE;
3376 /* Obtain the thread dump of all threads */
3378 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3380 ThreadDumpUserData ud;
3381 MonoInternalThread *thread_array [128];
3382 MonoDomain *domain = mono_domain_get ();
3383 MonoDebugSourceLocation *location;
3384 int tindex, nthreads;
3386 *out_threads = NULL;
3387 *out_stack_frames = NULL;
3389 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3390 nthreads = collect_threads (thread_array, 128);
3392 memset (&ud, 0, sizeof (ud));
3393 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3394 ud.max_frames = 256;
3396 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3397 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3399 for (tindex = 0; tindex < nthreads; ++tindex) {
3400 MonoInternalThread *thread = thread_array [tindex];
3401 MonoArray *thread_frames;
3407 /* Collect frames for the thread */
3408 if (thread == mono_thread_internal_current ()) {
3409 get_thread_dump (mono_thread_info_current (), &ud);
3411 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3414 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3416 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3417 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3419 for (i = 0; i < ud.nframes; ++i) {
3420 MonoStackFrameInfo *frame = &ud.frames [i];
3421 MonoMethod *method = NULL;
3422 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
3424 sf->native_offset = frame->native_offset;
3426 if (frame->type == FRAME_TYPE_MANAGED)
3427 method = mono_jit_info_get_method (frame->ji);
3430 sf->method_address = (gsize) frame->ji->code_start;
3432 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3434 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3436 sf->il_offset = location->il_offset;
3438 if (location && location->source_file) {
3439 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3440 sf->line = location->row;
3441 sf->column = location->column;
3443 mono_debug_free_source_location (location);
3448 mono_array_setref (thread_frames, i, sf);
3456 * mono_threads_request_thread_dump:
3458 * Ask all threads except the current to print their stacktrace to stdout.
3461 mono_threads_request_thread_dump (void)
3463 /*The new thread dump code runs out of the finalizer thread. */
3464 thread_dump_requested = TRUE;
3465 mono_gc_finalize_notify ();
3470 gint allocated; /* +1 so that refs [allocated] == NULL */
3474 typedef struct ref_stack RefStack;
3477 ref_stack_new (gint initial_size)
3481 initial_size = MAX (initial_size, 16) + 1;
3482 rs = g_new0 (RefStack, 1);
3483 rs->refs = g_new0 (gpointer, initial_size);
3484 rs->allocated = initial_size;
3489 ref_stack_destroy (gpointer ptr)
3491 RefStack *rs = (RefStack *)ptr;
3500 ref_stack_push (RefStack *rs, gpointer ptr)
3502 g_assert (rs != NULL);
3504 if (rs->bottom >= rs->allocated) {
3505 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3506 rs->allocated <<= 1;
3507 rs->refs [rs->allocated] = NULL;
3509 rs->refs [rs->bottom++] = ptr;
3513 ref_stack_pop (RefStack *rs)
3515 if (rs == NULL || rs->bottom == 0)
3519 rs->refs [rs->bottom] = NULL;
3523 ref_stack_find (RefStack *rs, gpointer ptr)
3530 for (refs = rs->refs; refs && *refs; refs++) {
3538 * mono_thread_push_appdomain_ref:
3540 * Register that the current thread may have references to objects in domain
3541 * @domain on its stack. Each call to this function should be paired with a
3542 * call to pop_appdomain_ref.
3545 mono_thread_push_appdomain_ref (MonoDomain *domain)
3547 MonoInternalThread *thread = mono_thread_internal_current ();
3550 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3551 SPIN_LOCK (thread->lock_thread_id);
3552 if (thread->appdomain_refs == NULL)
3553 thread->appdomain_refs = ref_stack_new (16);
3554 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3555 SPIN_UNLOCK (thread->lock_thread_id);
3560 mono_thread_pop_appdomain_ref (void)
3562 MonoInternalThread *thread = mono_thread_internal_current ();
3565 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3566 SPIN_LOCK (thread->lock_thread_id);
3567 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3568 SPIN_UNLOCK (thread->lock_thread_id);
3573 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3576 SPIN_LOCK (thread->lock_thread_id);
3577 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3578 SPIN_UNLOCK (thread->lock_thread_id);
3583 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3585 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3588 typedef struct abort_appdomain_data {
3589 struct wait_data wait;
3591 } abort_appdomain_data;
3594 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3596 MonoInternalThread *thread = (MonoInternalThread*)value;
3597 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3598 MonoDomain *domain = data->domain;
3600 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3601 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3603 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3604 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3607 data->wait.handles [data->wait.num] = handle;
3608 data->wait.threads [data->wait.num] = thread;
3611 /* Just ignore the rest, we can't do anything with
3619 * mono_threads_abort_appdomain_threads:
3621 * Abort threads which has references to the given appdomain.
3624 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3626 #ifdef __native_client__
3630 abort_appdomain_data user_data;
3632 int orig_timeout = timeout;
3635 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3637 start_time = mono_msec_ticks ();
3639 mono_threads_lock ();
3641 user_data.domain = domain;
3642 user_data.wait.num = 0;
3643 /* This shouldn't take any locks */
3644 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3645 mono_threads_unlock ();
3647 if (user_data.wait.num > 0) {
3648 /* Abort the threads outside the threads lock */
3649 for (i = 0; i < user_data.wait.num; ++i)
3650 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3653 * We should wait for the threads either to abort, or to leave the
3654 * domain. We can't do the latter, so we wait with a timeout.
3656 wait_for_tids (&user_data.wait, 100);
3659 /* Update remaining time */
3660 timeout -= mono_msec_ticks () - start_time;
3661 start_time = mono_msec_ticks ();
3663 if (orig_timeout != -1 && timeout < 0)
3666 while (user_data.wait.num > 0);
3668 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3674 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3676 MonoInternalThread *thread = (MonoInternalThread*)value;
3677 MonoDomain *domain = (MonoDomain*)user_data;
3680 /* No locking needed here */
3681 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3683 if (thread->cached_culture_info) {
3684 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3685 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3686 if (obj && obj->vtable->domain == domain)
3687 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3693 * mono_threads_clear_cached_culture:
3695 * Clear the cached_current_culture from all threads if it is in the
3699 mono_threads_clear_cached_culture (MonoDomain *domain)
3701 mono_threads_lock ();
3702 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3703 mono_threads_unlock ();
3707 * mono_thread_get_undeniable_exception:
3709 * Return an exception which needs to be raised when leaving a catch clause.
3710 * This is used for undeniable exception propagation.
3713 mono_thread_get_undeniable_exception (void)
3715 MonoInternalThread *thread = mono_thread_internal_current ();
3717 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3719 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3720 * exception if the thread no longer references a dying appdomain.
3722 thread->abort_exc->trace_ips = NULL;
3723 thread->abort_exc->stack_trace = NULL;
3724 return thread->abort_exc;
3730 #if MONO_SMALL_CONFIG
3731 #define NUM_STATIC_DATA_IDX 4
3732 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3736 #define NUM_STATIC_DATA_IDX 8
3737 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3738 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3742 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3743 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3746 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3748 gpointer *static_data = (gpointer *)addr;
3750 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3751 void **ptr = (void **)static_data [i];
3756 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3757 void **p = ptr + idx;
3760 mark_func ((MonoObject**)p, gc_data);
3766 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3768 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3772 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3774 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3778 * mono_alloc_static_data
3780 * Allocate memory blocks for storing threads or context static data
3783 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3785 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3788 gpointer* static_data = *static_data_ptr;
3790 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3791 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3793 if (mono_gc_user_markers_supported ()) {
3794 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3795 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3797 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3798 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3801 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3802 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3803 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3804 *static_data_ptr = static_data;
3805 static_data [0] = static_data;
3808 for (i = 1; i <= idx; ++i) {
3809 if (static_data [i])
3812 if (mono_gc_user_markers_supported ())
3813 static_data [i] = g_malloc0 (static_data_size [i]);
3815 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3816 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3817 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3822 mono_free_static_data (gpointer* static_data)
3825 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3826 gpointer p = static_data [i];
3830 * At this point, the static data pointer array is still registered with the
3831 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3832 * data. Freeing the individual arrays without first nulling their slots
3833 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3834 * such an already freed array. See bug #13813.
3836 static_data [i] = NULL;
3837 mono_memory_write_barrier ();
3838 if (mono_gc_user_markers_supported ())
3841 mono_gc_free_fixed (p);
3843 mono_gc_free_fixed (static_data);
3847 * mono_init_static_data_info
3849 * Initializes static data counters
3851 static void mono_init_static_data_info (StaticDataInfo *static_data)
3853 static_data->idx = 0;
3854 static_data->offset = 0;
3855 static_data->freelist = NULL;
3859 * mono_alloc_static_data_slot
3861 * Generates an offset for static data. static_data contains the counters
3862 * used to generate it.
3865 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3867 if (!static_data->idx && !static_data->offset) {
3869 * we use the first chunk of the first allocation also as
3870 * an array for the rest of the data
3872 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3874 static_data->offset += align - 1;
3875 static_data->offset &= ~(align - 1);
3876 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3877 static_data->idx ++;
3878 g_assert (size <= static_data_size [static_data->idx]);
3879 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3880 static_data->offset = 0;
3882 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
3883 static_data->offset += size;
3888 * ensure thread static fields already allocated are valid for thread
3889 * This function is called when a thread is created or on thread attach.
3892 thread_adjust_static_data (MonoInternalThread *thread)
3894 mono_threads_lock ();
3895 if (thread_static_info.offset || thread_static_info.idx > 0) {
3896 /* get the current allocated size */
3897 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
3898 mono_alloc_static_data (&thread->static_data, offset, TRUE);
3900 mono_threads_unlock ();
3904 * LOCKING: requires that threads_mutex is held
3907 context_adjust_static_data (MonoAppContext *ctx)
3909 if (context_static_info.offset || context_static_info.idx > 0) {
3910 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
3911 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3912 ctx->data->static_data = ctx->static_data;
3917 * LOCKING: requires that threads_mutex is held
3920 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3922 MonoInternalThread *thread = (MonoInternalThread *)value;
3923 guint32 offset = GPOINTER_TO_UINT (user);
3925 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3929 * LOCKING: requires that threads_mutex is held
3932 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
3934 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
3939 guint32 offset = GPOINTER_TO_UINT (user);
3940 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3941 ctx->data->static_data = ctx->static_data;
3944 static StaticDataFreeList*
3945 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3947 StaticDataFreeList* prev = NULL;
3948 StaticDataFreeList* tmp = static_data->freelist;
3950 if (tmp->size == size) {
3952 prev->next = tmp->next;
3954 static_data->freelist = tmp->next;
3963 #if SIZEOF_VOID_P == 4
3970 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
3972 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3974 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
3975 MonoBitSet *rb = sets [idx];
3976 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3977 offset /= sizeof (uintptr_t);
3978 /* offset is now the bitmap offset */
3979 for (int i = 0; i < numbits; ++i) {
3980 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3981 mono_bitset_set_fast (rb, offset + i);
3986 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
3988 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3989 MonoBitSet *rb = sets [idx];
3990 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3991 offset /= sizeof (uintptr_t);
3992 /* offset is now the bitmap offset */
3993 for (int i = 0; i < size / sizeof (uintptr_t); i++)
3994 mono_bitset_clear_fast (rb, offset + i);
3998 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4000 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4002 StaticDataInfo *info;
4005 if (static_type == SPECIAL_STATIC_THREAD) {
4006 info = &thread_static_info;
4007 sets = thread_reference_bitmaps;
4009 info = &context_static_info;
4010 sets = context_reference_bitmaps;
4013 mono_threads_lock ();
4015 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4019 offset = item->offset;
4022 offset = mono_alloc_static_data_slot (info, size, align);
4025 update_reference_bitmap (sets, offset, bitmap, numbits);
4027 if (static_type == SPECIAL_STATIC_THREAD) {
4028 /* This can be called during startup */
4029 if (threads != NULL)
4030 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4032 if (contexts != NULL)
4033 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4035 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4038 mono_threads_unlock ();
4044 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4046 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4048 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4049 return get_thread_static_data (thread, offset);
4051 return get_context_static_data (thread->current_appcontext, offset);
4056 mono_get_special_static_data (guint32 offset)
4058 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4067 * LOCKING: requires that threads_mutex is held
4070 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4072 MonoInternalThread *thread = (MonoInternalThread *)value;
4073 OffsetSize *data = (OffsetSize *)user;
4074 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4075 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4078 if (!thread->static_data || !thread->static_data [idx])
4080 ptr = ((char*) thread->static_data [idx]) + off;
4081 mono_gc_bzero_atomic (ptr, data->size);
4085 * LOCKING: requires that threads_mutex is held
4088 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4090 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4095 OffsetSize *data = (OffsetSize *)user;
4096 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4097 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4100 if (!ctx->static_data || !ctx->static_data [idx])
4103 ptr = ((char*) ctx->static_data [idx]) + off;
4104 mono_gc_bzero_atomic (ptr, data->size);
4108 do_free_special_slot (guint32 offset, guint32 size)
4110 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4112 StaticDataInfo *info;
4114 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4115 info = &thread_static_info;
4116 sets = thread_reference_bitmaps;
4118 info = &context_static_info;
4119 sets = context_reference_bitmaps;
4122 guint32 data_offset = offset;
4123 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4124 OffsetSize data = { data_offset, size };
4126 clear_reference_bitmap (sets, data.offset, data.size);
4128 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4129 if (threads != NULL)
4130 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4132 if (contexts != NULL)
4133 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4136 if (!mono_runtime_is_shutting_down ()) {
4137 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4139 item->offset = offset;
4142 item->next = info->freelist;
4143 info->freelist = item;
4148 do_free_special (gpointer key, gpointer value, gpointer data)
4150 MonoClassField *field = (MonoClassField *)key;
4151 guint32 offset = GPOINTER_TO_UINT (value);
4154 size = mono_type_size (field->type, &align);
4155 do_free_special_slot (offset, size);
4159 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4161 mono_threads_lock ();
4163 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4165 mono_threads_unlock ();
4169 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4171 /* Only ever called for ThreadLocal instances */
4172 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4174 mono_threads_lock ();
4175 do_free_special_slot (offset, size);
4176 mono_threads_unlock ();
4180 static void CALLBACK dummy_apc (ULONG_PTR param)
4186 * mono_thread_execute_interruption
4188 * Performs the operation that the requested thread state requires (abort,
4191 static MonoException*
4192 mono_thread_execute_interruption (void)
4194 MonoInternalThread *thread = mono_thread_internal_current ();
4196 LOCK_THREAD (thread);
4198 /* MonoThread::interruption_requested can only be changed with atomics */
4199 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4200 /* this will consume pending APC calls */
4202 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4204 InterlockedDecrement (&thread_interruption_requested);
4206 /* Clear the interrupted flag of the thread so it can wait again */
4207 mono_thread_info_clear_self_interrupt ();
4210 if ((thread->state & ThreadState_AbortRequested) != 0) {
4211 UNLOCK_THREAD (thread);
4212 if (thread->abort_exc == NULL) {
4214 * This might be racy, but it has to be called outside the lock
4215 * since it calls managed code.
4217 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4219 return thread->abort_exc;
4221 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4222 self_suspend_internal (thread);
4225 else if ((thread->state & ThreadState_StopRequested) != 0) {
4226 /* FIXME: do this through the JIT? */
4228 UNLOCK_THREAD (thread);
4230 mono_thread_exit ();
4232 } else if (thread->pending_exception) {
4235 exc = thread->pending_exception;
4236 thread->pending_exception = NULL;
4238 UNLOCK_THREAD (thread);
4240 } else if (thread->thread_interrupt_requested) {
4242 thread->thread_interrupt_requested = FALSE;
4243 UNLOCK_THREAD (thread);
4245 return(mono_get_exception_thread_interrupted ());
4248 UNLOCK_THREAD (thread);
4254 * mono_thread_request_interruption
4256 * A signal handler can call this method to request the interruption of a
4257 * thread. The result of the interruption will depend on the current state of
4258 * the thread. If the result is an exception that needs to be throw, it is
4259 * provided as return value.
4262 mono_thread_request_interruption (gboolean running_managed)
4264 MonoInternalThread *thread = mono_thread_internal_current ();
4266 /* The thread may already be stopping */
4271 if (thread->interrupt_on_stop &&
4272 thread->state & ThreadState_StopRequested &&
4273 thread->state & ThreadState_Background)
4277 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4279 InterlockedIncrement (&thread_interruption_requested);
4281 if (!running_managed || is_running_protected_wrapper ()) {
4282 /* Can't stop while in unmanaged code. Increase the global interruption
4283 request count. When exiting the unmanaged method the count will be
4284 checked and the thread will be interrupted. */
4286 if (mono_thread_notify_pending_exc_fn && !running_managed)
4287 /* The JIT will notify the thread about the interruption */
4288 /* This shouldn't take any locks */
4289 mono_thread_notify_pending_exc_fn (NULL);
4291 /* this will awake the thread if it is in WaitForSingleObject
4293 /* Our implementation of this function ignores the func argument */
4295 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4297 mono_thread_info_self_interrupt ();
4302 return mono_thread_execute_interruption ();
4306 /*This function should be called by a thread after it has exited all of
4307 * its handle blocks at interruption time.*/
4309 mono_thread_resume_interruption (void)
4311 MonoInternalThread *thread = mono_thread_internal_current ();
4312 gboolean still_aborting;
4314 /* The thread may already be stopping */
4318 LOCK_THREAD (thread);
4319 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4320 UNLOCK_THREAD (thread);
4322 /*This can happen if the protected block called Thread::ResetAbort*/
4323 if (!still_aborting)
4326 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4328 InterlockedIncrement (&thread_interruption_requested);
4330 mono_thread_info_self_interrupt ();
4332 return mono_thread_execute_interruption ();
4335 gboolean mono_thread_interruption_requested ()
4337 if (thread_interruption_requested) {
4338 MonoInternalThread *thread = mono_thread_internal_current ();
4339 /* The thread may already be stopping */
4341 return (thread->interruption_requested);
4346 static MonoException*
4347 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4349 MonoInternalThread *thread = mono_thread_internal_current ();
4351 /* The thread may already be stopping */
4355 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4356 MonoException* exc = mono_thread_execute_interruption ();
4364 * Performs the interruption of the current thread, if one has been requested,
4365 * and the thread is not running a protected wrapper.
4366 * Return the exception which needs to be thrown, if any.
4369 mono_thread_interruption_checkpoint (void)
4371 return mono_thread_interruption_checkpoint_request (FALSE);
4375 * Performs the interruption of the current thread, if one has been requested.
4376 * Return the exception which needs to be thrown, if any.
4379 mono_thread_force_interruption_checkpoint_noraise (void)
4381 return mono_thread_interruption_checkpoint_request (TRUE);
4385 * Performs the interruption of the current thread, if one has been requested.
4386 * Throw the exception which needs to be thrown, if any.
4389 mono_thread_force_interruption_checkpoint (void)
4393 ex = mono_thread_interruption_checkpoint_request (TRUE);
4395 mono_raise_exception (ex);
4399 * mono_thread_get_and_clear_pending_exception:
4401 * Return any pending exceptions for the current thread and clear it as a side effect.
4404 mono_thread_get_and_clear_pending_exception (void)
4406 MonoInternalThread *thread = mono_thread_internal_current ();
4408 /* The thread may already be stopping */
4412 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4413 return mono_thread_execute_interruption ();
4416 if (thread->pending_exception) {
4417 MonoException *exc = thread->pending_exception;
4419 thread->pending_exception = NULL;
4427 * mono_set_pending_exception:
4429 * Set the pending exception of the current thread to EXC.
4430 * The exception will be thrown when execution returns to managed code.
4433 mono_set_pending_exception (MonoException *exc)
4435 MonoInternalThread *thread = mono_thread_internal_current ();
4437 /* The thread may already be stopping */
4441 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4443 mono_thread_request_interruption (FALSE);
4447 * mono_thread_interruption_request_flag:
4449 * Returns the address of a flag that will be non-zero if an interruption has
4450 * been requested for a thread. The thread to interrupt may not be the current
4451 * thread, so an additional call to mono_thread_interruption_requested() or
4452 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4455 gint32* mono_thread_interruption_request_flag ()
4457 return &thread_interruption_requested;
4461 mono_thread_init_apartment_state (void)
4464 MonoInternalThread* thread = mono_thread_internal_current ();
4466 /* Positive return value indicates success, either
4467 * S_OK if this is first CoInitialize call, or
4468 * S_FALSE if CoInitialize already called, but with same
4469 * threading model. A negative value indicates failure,
4470 * probably due to trying to change the threading model.
4472 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4473 ? COINIT_APARTMENTTHREADED
4474 : COINIT_MULTITHREADED) < 0) {
4475 thread->apartment_state = ThreadApartmentState_Unknown;
4481 mono_thread_cleanup_apartment_state (void)
4484 MonoInternalThread* thread = mono_thread_internal_current ();
4486 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4493 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4495 LOCK_THREAD (thread);
4496 thread->state |= state;
4497 UNLOCK_THREAD (thread);
4501 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4503 LOCK_THREAD (thread);
4504 thread->state &= ~state;
4505 UNLOCK_THREAD (thread);
4509 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4511 gboolean ret = FALSE;
4513 LOCK_THREAD (thread);
4515 if ((thread->state & test) != 0) {
4519 UNLOCK_THREAD (thread);
4524 static gboolean has_tls_get = FALSE;
4527 mono_runtime_set_has_tls_get (gboolean val)
4533 mono_runtime_has_tls_get (void)
4539 self_interrupt_thread (void *_unused)
4541 MonoThreadInfo *info = mono_thread_info_current ();
4542 MonoException *exc = mono_thread_execute_interruption ();
4543 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4544 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. */
4545 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4549 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4553 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4557 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4559 MonoJitInfo **dest = (MonoJitInfo **)data;
4565 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4567 MonoJitInfo *ji = NULL;
4570 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4575 MonoInternalThread *thread;
4576 gboolean install_async_abort;
4577 MonoThreadInfoInterruptToken *interrupt_token;
4580 static SuspendThreadResult
4581 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4583 AbortThreadData *data = (AbortThreadData *)ud;
4584 MonoInternalThread *thread = data->thread;
4585 MonoJitInfo *ji = NULL;
4586 gboolean protected_wrapper;
4587 gboolean running_managed;
4589 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4590 return MonoResumeThread;
4592 /*someone is already interrupting it*/
4593 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4594 return MonoResumeThread;
4596 InterlockedIncrement (&thread_interruption_requested);
4598 ji = mono_thread_info_get_last_managed (info);
4599 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4600 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4602 if (!protected_wrapper && running_managed) {
4603 /*We are in managed code*/
4604 /*Set the thread to call */
4605 if (data->install_async_abort)
4606 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4607 return MonoResumeThread;
4609 if (mono_thread_notify_pending_exc_fn)
4610 /* The JIT will notify the thread about the interruption */
4611 mono_thread_notify_pending_exc_fn (info);
4614 * This will cause waits to be broken.
4615 * It will also prevent the thread from entering a wait, so if the thread returns
4616 * from the wait before it receives the abort signal, it will just spin in the wait
4617 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4620 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4622 return MonoResumeThread;
4627 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4629 AbortThreadData data = { 0 };
4630 data.thread = thread;
4631 data.install_async_abort = install_async_abort;
4634 FIXME this is insanely broken, it doesn't cause interruption to happen
4635 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4637 if (thread == mono_thread_internal_current ()) {
4638 /* Do it synchronously */
4639 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4641 mono_raise_exception (exc);
4643 mono_thread_info_self_interrupt ();
4648 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4649 if (data.interrupt_token)
4650 mono_thread_info_finish_interrupt (data.interrupt_token);
4651 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4655 MonoInternalThread *thread;
4657 MonoThreadInfoInterruptToken *interrupt_token;
4658 } SuspendThreadData;
4660 static SuspendThreadResult
4661 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4663 SuspendThreadData *data = (SuspendThreadData *)ud;
4664 MonoInternalThread *thread = data->thread;
4665 MonoJitInfo *ji = NULL;
4666 gboolean protected_wrapper;
4667 gboolean running_managed;
4669 ji = mono_thread_info_get_last_managed (info);
4670 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4671 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4673 if (running_managed && !protected_wrapper) {
4674 thread->state &= ~ThreadState_SuspendRequested;
4675 thread->state |= ThreadState_Suspended;
4676 return KeepSuspended;
4678 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4679 InterlockedIncrement (&thread_interruption_requested);
4680 if (data->interrupt)
4681 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4683 if (mono_thread_notify_pending_exc_fn && !running_managed)
4684 /* The JIT will notify the thread about the interruption */
4685 mono_thread_notify_pending_exc_fn (info);
4686 return MonoResumeThread;
4691 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4693 LOCK_THREAD (thread);
4694 if (thread == mono_thread_internal_current ()) {
4695 mono_thread_info_begin_self_suspend ();
4696 //XXX replace this with better named functions
4697 thread->state &= ~ThreadState_SuspendRequested;
4698 thread->state |= ThreadState_Suspended;
4699 UNLOCK_THREAD (thread);
4700 mono_thread_info_end_self_suspend ();
4702 SuspendThreadData data = { 0 };
4703 data.thread = thread;
4704 data.interrupt = interrupt;
4706 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4707 if (data.interrupt_token)
4708 mono_thread_info_finish_interrupt (data.interrupt_token);
4709 UNLOCK_THREAD (thread);
4713 /*This is called with @thread synch_cs held and it must release it*/
4715 self_suspend_internal (MonoInternalThread *thread)
4717 mono_thread_info_begin_self_suspend ();
4718 thread->state &= ~ThreadState_SuspendRequested;
4719 thread->state |= ThreadState_Suspended;
4720 UNLOCK_THREAD (thread);
4721 mono_thread_info_end_self_suspend ();
4726 * mono_thread_is_foreign:
4727 * @thread: the thread to query
4729 * This function allows one to determine if a thread was created by the mono runtime and has
4730 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4732 * Returns: true if @thread was not created by the runtime.
4735 mono_thread_is_foreign (MonoThread *thread)
4737 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4738 return info->runtime_thread == FALSE;
4742 * mono_add_joinable_thread:
4744 * Add TID to the list of joinable threads.
4745 * LOCKING: Acquires the threads lock.
4748 mono_threads_add_joinable_thread (gpointer tid)
4752 * We cannot detach from threads because it causes problems like
4753 * 2fd16f60/r114307. So we collect them and join them when
4754 * we have time (in he finalizer thread).
4756 joinable_threads_lock ();
4757 if (!joinable_threads)
4758 joinable_threads = g_hash_table_new (NULL, NULL);
4759 g_hash_table_insert (joinable_threads, tid, tid);
4760 joinable_thread_count ++;
4761 joinable_threads_unlock ();
4763 mono_gc_finalize_notify ();
4768 * mono_threads_join_threads:
4770 * Join all joinable threads. This is called from the finalizer thread.
4771 * LOCKING: Acquires the threads lock.
4774 mono_threads_join_threads (void)
4777 GHashTableIter iter;
4784 if (!joinable_thread_count)
4788 joinable_threads_lock ();
4790 if (g_hash_table_size (joinable_threads)) {
4791 g_hash_table_iter_init (&iter, joinable_threads);
4792 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4793 thread = (pthread_t)tid;
4794 g_hash_table_remove (joinable_threads, key);
4795 joinable_thread_count --;
4798 joinable_threads_unlock ();
4800 if (thread != pthread_self ())
4801 /* This shouldn't block */
4802 pthread_join (thread, NULL);
4813 * Wait for thread TID to exit.
4814 * LOCKING: Acquires the threads lock.
4817 mono_thread_join (gpointer tid)
4821 gboolean found = FALSE;
4823 joinable_threads_lock ();
4824 if (!joinable_threads)
4825 joinable_threads = g_hash_table_new (NULL, NULL);
4826 if (g_hash_table_lookup (joinable_threads, tid)) {
4827 g_hash_table_remove (joinable_threads, tid);
4828 joinable_thread_count --;
4831 joinable_threads_unlock ();
4834 thread = (pthread_t)tid;
4835 pthread_join (thread, NULL);
4840 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4842 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4843 mono_thread_interruption_checkpoint ();
4846 static inline gboolean
4847 is_appdomainunloaded_exception (MonoClass *klass)
4849 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4851 if (!app_domain_unloaded_exception_klass)
4852 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4853 g_assert (app_domain_unloaded_exception_klass);
4855 return klass == app_domain_unloaded_exception_klass;
4858 static inline gboolean
4859 is_threadabort_exception (MonoClass *klass)
4861 return klass == mono_defaults.threadabortexception_class;
4865 mono_thread_internal_unhandled_exception (MonoObject* exc)
4867 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4868 MonoClass *klass = exc->vtable->klass;
4869 if (is_threadabort_exception (klass)) {
4870 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4871 } else if (!is_appdomainunloaded_exception (klass)) {
4872 mono_unhandled_exception (exc);
4873 if (mono_environment_exitcode_get () == 1)
4880 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4882 mono_threads_get_thread_dump (out_threads, out_stack_traces);