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 (void);
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_internal:
1305 * @param this_obj: The MonoInternalThread on which to operate.
1307 * Gets the priority of the given thread.
1308 * @return: The priority of the given thread.
1311 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1314 MonoInternalThread *internal = this_obj->internal_thread;
1316 LOCK_THREAD (internal);
1317 priority = GetThreadPriority (internal->handle) + 2;
1318 UNLOCK_THREAD (internal);
1323 * ves_icall_System_Threading_Thread_SetPriority_internal:
1324 * @param this_obj: The MonoInternalThread on which to operate.
1325 * @param priority: The priority to set.
1327 * Sets the priority of the given thread.
1330 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1332 MonoInternalThread *internal = this_obj->internal_thread;
1334 LOCK_THREAD (internal);
1335 SetThreadPriority (internal->handle, priority - 2);
1336 UNLOCK_THREAD (internal);
1339 /* If the array is already in the requested domain, we just return it,
1340 otherwise we return a copy in that domain. */
1342 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1349 if (mono_object_domain (arr) == domain)
1352 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1353 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1358 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1360 return byte_array_to_domain (arr, mono_get_root_domain ());
1364 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1366 return byte_array_to_domain (arr, mono_domain_get ());
1370 mono_thread_current (void)
1372 MonoDomain *domain = mono_domain_get ();
1373 MonoInternalThread *internal = mono_thread_internal_current ();
1374 MonoThread **current_thread_ptr;
1376 g_assert (internal);
1377 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1379 if (!*current_thread_ptr) {
1380 g_assert (domain != mono_get_root_domain ());
1381 *current_thread_ptr = new_thread_with_internal (domain, internal);
1383 return *current_thread_ptr;
1386 /* Return the thread object belonging to INTERNAL in the current domain */
1388 mono_thread_current_for_thread (MonoInternalThread *internal)
1390 MonoDomain *domain = mono_domain_get ();
1391 MonoThread **current_thread_ptr;
1393 g_assert (internal);
1394 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1396 if (!*current_thread_ptr) {
1397 g_assert (domain != mono_get_root_domain ());
1398 *current_thread_ptr = new_thread_with_internal (domain, internal);
1400 return *current_thread_ptr;
1404 mono_thread_internal_current (void)
1406 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1407 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1412 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1414 MonoInternalThread *thread = this_obj->internal_thread;
1415 HANDLE handle = thread->handle;
1416 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1419 mono_thread_current_check_pending_interrupt ();
1421 LOCK_THREAD (thread);
1423 if ((thread->state & ThreadState_Unstarted) != 0) {
1424 UNLOCK_THREAD (thread);
1426 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1430 UNLOCK_THREAD (thread);
1435 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1437 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1439 MONO_PREPARE_BLOCKING;
1440 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1441 MONO_FINISH_BLOCKING;
1443 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1445 if(ret==WAIT_OBJECT_0) {
1446 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1451 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1457 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1465 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1467 MONO_PREPARE_BLOCKING;
1469 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1471 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1472 MONO_FINISH_BLOCKING;
1474 if (ret != WAIT_IO_COMPLETION)
1477 exc = mono_thread_execute_interruption ();
1479 mono_raise_exception (exc);
1484 /* Re-calculate ms according to the time passed */
1485 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1486 if (diff_ms >= ms) {
1490 wait = ms - diff_ms;
1496 /* FIXME: exitContext isnt documented */
1497 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1503 MonoObject *waitHandle;
1504 MonoInternalThread *thread = mono_thread_internal_current ();
1506 /* Do this WaitSleepJoin check before creating objects */
1507 mono_thread_current_check_pending_interrupt ();
1509 /* We fail in managed if the array has more than 64 elements */
1510 numhandles = (guint32)mono_array_length(mono_handles);
1511 handles = g_new0(HANDLE, numhandles);
1513 for(i = 0; i < numhandles; i++) {
1514 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1515 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1522 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1524 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1526 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1530 if(ret==WAIT_FAILED) {
1531 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1533 } else if(ret==WAIT_TIMEOUT) {
1534 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1541 /* FIXME: exitContext isnt documented */
1542 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1544 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1545 uintptr_t numhandles;
1548 MonoObject *waitHandle;
1549 MonoInternalThread *thread = mono_thread_internal_current ();
1551 /* Do this WaitSleepJoin check before creating objects */
1552 mono_thread_current_check_pending_interrupt ();
1554 numhandles = mono_array_length(mono_handles);
1555 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1558 for(i = 0; i < numhandles; i++) {
1559 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1560 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1567 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1569 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1571 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1573 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1576 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1578 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1579 return ret - WAIT_OBJECT_0;
1581 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1582 return ret - WAIT_ABANDONED_0;
1589 /* FIXME: exitContext isnt documented */
1590 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1593 MonoInternalThread *thread = mono_thread_internal_current ();
1595 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1601 mono_thread_current_check_pending_interrupt ();
1603 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1605 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1607 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1609 if(ret==WAIT_FAILED) {
1610 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1612 } else if(ret==WAIT_TIMEOUT) {
1613 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1621 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1624 MonoInternalThread *thread = mono_thread_internal_current ();
1629 mono_thread_current_check_pending_interrupt ();
1631 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1633 MONO_PREPARE_BLOCKING;
1634 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1635 MONO_FINISH_BLOCKING;
1637 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1639 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1642 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1649 mutex = CreateMutex (NULL, owned, NULL);
1651 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1653 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1661 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1662 return(ReleaseMutex (handle));
1665 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1671 *error = ERROR_SUCCESS;
1673 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1675 *error = GetLastError ();
1682 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1689 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1691 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1692 mono_string_chars (name));
1694 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1702 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1706 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1711 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1715 *error = ERROR_SUCCESS;
1717 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1719 *error = GetLastError ();
1725 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1732 event = CreateEvent (NULL, manual, initial, NULL);
1734 event = CreateEvent (NULL, manual, initial,
1735 mono_string_chars (name));
1737 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1745 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1746 return (SetEvent(handle));
1749 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1750 return (ResetEvent(handle));
1754 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1755 CloseHandle (handle);
1758 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1764 *error = ERROR_SUCCESS;
1766 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1768 *error = GetLastError ();
1774 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1776 return InterlockedIncrement (location);
1779 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1781 #if SIZEOF_VOID_P == 4
1782 if (G_UNLIKELY ((size_t)location & 0x7)) {
1784 mono_interlocked_lock ();
1787 mono_interlocked_unlock ();
1791 return InterlockedIncrement64 (location);
1794 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1796 return InterlockedDecrement(location);
1799 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1801 #if SIZEOF_VOID_P == 4
1802 if (G_UNLIKELY ((size_t)location & 0x7)) {
1804 mono_interlocked_lock ();
1807 mono_interlocked_unlock ();
1811 return InterlockedDecrement64 (location);
1814 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1816 return InterlockedExchange(location, value);
1819 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1822 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1823 mono_gc_wbarrier_generic_nostore (location);
1827 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1829 return InterlockedExchangePointer(location, value);
1832 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1834 IntFloatUnion val, ret;
1837 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1843 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1845 #if SIZEOF_VOID_P == 4
1846 if (G_UNLIKELY ((size_t)location & 0x7)) {
1848 mono_interlocked_lock ();
1851 mono_interlocked_unlock ();
1855 return InterlockedExchange64 (location, value);
1859 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1861 LongDoubleUnion val, ret;
1864 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1869 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1871 return InterlockedCompareExchange(location, value, comparand);
1874 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1876 gint32 r = InterlockedCompareExchange(location, value, comparand);
1877 *success = r == comparand;
1881 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1884 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1885 mono_gc_wbarrier_generic_nostore (location);
1889 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1891 return InterlockedCompareExchangePointer(location, value, comparand);
1894 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1896 IntFloatUnion val, ret, cmp;
1899 cmp.fval = comparand;
1900 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1906 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1908 #if SIZEOF_VOID_P == 8
1909 LongDoubleUnion val, comp, ret;
1912 comp.fval = comparand;
1913 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1919 mono_interlocked_lock ();
1921 if (old == comparand)
1923 mono_interlocked_unlock ();
1930 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1932 #if SIZEOF_VOID_P == 4
1933 if (G_UNLIKELY ((size_t)location & 0x7)) {
1935 mono_interlocked_lock ();
1937 if (old == comparand)
1939 mono_interlocked_unlock ();
1943 return InterlockedCompareExchange64 (location, value, comparand);
1947 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1950 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
1951 mono_gc_wbarrier_generic_nostore (location);
1956 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1959 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
1960 mono_gc_wbarrier_generic_nostore (location);
1965 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1967 return InterlockedAdd (location, value);
1971 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1973 #if SIZEOF_VOID_P == 4
1974 if (G_UNLIKELY ((size_t)location & 0x7)) {
1976 mono_interlocked_lock ();
1979 mono_interlocked_unlock ();
1983 return InterlockedAdd64 (location, value);
1987 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1989 #if SIZEOF_VOID_P == 4
1990 if (G_UNLIKELY ((size_t)location & 0x7)) {
1992 mono_interlocked_lock ();
1994 mono_interlocked_unlock ();
1998 return InterlockedRead64 (location);
2002 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2004 mono_memory_barrier ();
2008 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2010 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2012 if (state & ThreadState_Background) {
2013 /* If the thread changes the background mode, the main thread has to
2014 * be notified, since it has to rebuild the list of threads to
2017 SetEvent (background_change_event);
2022 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2024 mono_thread_set_state (this_obj, (MonoThreadState)state);
2026 if (state & ThreadState_Background) {
2027 /* If the thread changes the background mode, the main thread has to
2028 * be notified, since it has to rebuild the list of threads to
2031 SetEvent (background_change_event);
2036 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2040 LOCK_THREAD (this_obj);
2042 state = this_obj->state;
2044 UNLOCK_THREAD (this_obj);
2049 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2051 MonoInternalThread *current;
2053 MonoInternalThread *thread = this_obj->internal_thread;
2055 LOCK_THREAD (thread);
2057 current = mono_thread_internal_current ();
2059 thread->thread_interrupt_requested = TRUE;
2060 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2062 UNLOCK_THREAD (thread);
2065 abort_thread_internal (thread, TRUE, FALSE);
2069 void mono_thread_current_check_pending_interrupt ()
2071 MonoInternalThread *thread = mono_thread_internal_current ();
2072 gboolean throw_ = FALSE;
2074 LOCK_THREAD (thread);
2076 if (thread->thread_interrupt_requested) {
2078 thread->thread_interrupt_requested = FALSE;
2081 UNLOCK_THREAD (thread);
2084 mono_raise_exception (mono_get_exception_thread_interrupted ());
2089 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2091 LOCK_THREAD (thread);
2093 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2094 (thread->state & ThreadState_StopRequested) != 0 ||
2095 (thread->state & ThreadState_Stopped) != 0)
2097 UNLOCK_THREAD (thread);
2101 if ((thread->state & ThreadState_Unstarted) != 0) {
2102 thread->state |= ThreadState_Aborted;
2103 UNLOCK_THREAD (thread);
2107 thread->state |= ThreadState_AbortRequested;
2108 if (thread->abort_state_handle)
2109 mono_gchandle_free (thread->abort_state_handle);
2111 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2112 g_assert (thread->abort_state_handle);
2114 thread->abort_state_handle = 0;
2116 thread->abort_exc = NULL;
2118 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));
2120 /* During shutdown, we can't wait for other threads */
2122 /* Make sure the thread is awake */
2123 mono_thread_resume (thread);
2125 UNLOCK_THREAD (thread);
2127 abort_thread_internal (thread, TRUE, TRUE);
2131 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2133 MonoInternalThread *thread = mono_thread_internal_current ();
2134 gboolean was_aborting;
2136 LOCK_THREAD (thread);
2137 was_aborting = thread->state & ThreadState_AbortRequested;
2138 thread->state &= ~ThreadState_AbortRequested;
2139 UNLOCK_THREAD (thread);
2141 if (!was_aborting) {
2142 const char *msg = "Unable to reset abort because no abort was requested";
2143 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2146 thread->abort_exc = NULL;
2147 if (thread->abort_state_handle) {
2148 mono_gchandle_free (thread->abort_state_handle);
2149 /* This is actually not necessary - the handle
2150 only counts if the exception is set */
2151 thread->abort_state_handle = 0;
2156 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2158 LOCK_THREAD (thread);
2160 thread->state &= ~ThreadState_AbortRequested;
2162 if (thread->abort_exc) {
2163 thread->abort_exc = NULL;
2164 if (thread->abort_state_handle) {
2165 mono_gchandle_free (thread->abort_state_handle);
2166 /* This is actually not necessary - the handle
2167 only counts if the exception is set */
2168 thread->abort_state_handle = 0;
2172 UNLOCK_THREAD (thread);
2176 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2178 MonoInternalThread *thread = this_obj->internal_thread;
2179 MonoObject *state, *deserialized = NULL, *exc;
2182 if (!thread->abort_state_handle)
2185 state = mono_gchandle_get_target (thread->abort_state_handle);
2188 domain = mono_domain_get ();
2189 if (mono_object_domain (state) == domain)
2192 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2194 if (!deserialized) {
2195 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2197 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2198 mono_set_pending_exception (invalid_op_exc);
2202 return deserialized;
2206 mono_thread_suspend (MonoInternalThread *thread)
2208 LOCK_THREAD (thread);
2210 if ((thread->state & ThreadState_Unstarted) != 0 ||
2211 (thread->state & ThreadState_Aborted) != 0 ||
2212 (thread->state & ThreadState_Stopped) != 0)
2214 UNLOCK_THREAD (thread);
2218 if ((thread->state & ThreadState_Suspended) != 0 ||
2219 (thread->state & ThreadState_SuspendRequested) != 0 ||
2220 (thread->state & ThreadState_StopRequested) != 0)
2222 UNLOCK_THREAD (thread);
2226 thread->state |= ThreadState_SuspendRequested;
2228 UNLOCK_THREAD (thread);
2230 suspend_thread_internal (thread, FALSE);
2235 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2237 if (!mono_thread_suspend (this_obj->internal_thread)) {
2238 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2243 /* LOCKING: LOCK_THREAD(thread) must be held */
2245 mono_thread_resume (MonoInternalThread *thread)
2247 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2248 thread->state &= ~ThreadState_SuspendRequested;
2252 if ((thread->state & ThreadState_Suspended) == 0 ||
2253 (thread->state & ThreadState_Unstarted) != 0 ||
2254 (thread->state & ThreadState_Aborted) != 0 ||
2255 (thread->state & ThreadState_Stopped) != 0)
2260 UNLOCK_THREAD (thread);
2262 /* Awake the thread */
2263 if (!mono_thread_info_resume (thread_get_tid (thread)))
2266 LOCK_THREAD (thread);
2268 thread->state &= ~ThreadState_Suspended;
2274 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2276 if (!thread->internal_thread) {
2277 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2279 LOCK_THREAD (thread->internal_thread);
2280 if (!mono_thread_resume (thread->internal_thread))
2281 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2282 UNLOCK_THREAD (thread->internal_thread);
2287 mono_threads_is_critical_method (MonoMethod *method)
2289 switch (method->wrapper_type) {
2290 case MONO_WRAPPER_RUNTIME_INVOKE:
2291 case MONO_WRAPPER_XDOMAIN_INVOKE:
2292 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2299 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2304 if (mono_threads_is_critical_method (m)) {
2305 *((gboolean*)data) = TRUE;
2312 is_running_protected_wrapper (void)
2314 gboolean found = FALSE;
2315 mono_stack_walk (find_wrapper, &found);
2319 void mono_thread_internal_stop (MonoInternalThread *thread)
2321 LOCK_THREAD (thread);
2323 if ((thread->state & ThreadState_StopRequested) != 0 ||
2324 (thread->state & ThreadState_Stopped) != 0)
2326 UNLOCK_THREAD (thread);
2330 /* Make sure the thread is awake */
2331 mono_thread_resume (thread);
2333 thread->state |= ThreadState_StopRequested;
2334 thread->state &= ~ThreadState_AbortRequested;
2336 UNLOCK_THREAD (thread);
2338 abort_thread_internal (thread, TRUE, TRUE);
2341 void mono_thread_stop (MonoThread *thread)
2343 mono_thread_internal_stop (thread->internal_thread);
2347 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2350 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2355 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2358 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2363 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2366 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2371 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2374 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2379 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2382 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2383 return (void *) tmp;
2387 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2389 volatile MonoObject *tmp;
2390 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2391 return (MonoObject *) tmp;
2395 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2398 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2403 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2406 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2411 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2413 return InterlockedRead8 ((volatile gint8 *)ptr);
2417 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2419 return InterlockedRead16 ((volatile gint16 *)ptr);
2423 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2425 return InterlockedRead ((volatile gint32 *)ptr);
2429 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2431 #if SIZEOF_VOID_P == 4
2432 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2434 mono_interlocked_lock ();
2435 val = *(gint64*)ptr;
2436 mono_interlocked_unlock ();
2440 return InterlockedRead64 ((volatile gint64 *)ptr);
2444 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2446 return InterlockedReadPointer ((volatile gpointer *)ptr);
2450 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2454 #if SIZEOF_VOID_P == 4
2455 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2457 mono_interlocked_lock ();
2458 val = *(double*)ptr;
2459 mono_interlocked_unlock ();
2464 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2470 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2474 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2480 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2482 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2486 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2488 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2492 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2494 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2498 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2500 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2504 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2506 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2510 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2512 mono_atomic_store_release ((volatile void **) ptr, value);
2516 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2518 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2522 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2524 mono_atomic_store_release ((volatile double *) ptr, value);
2528 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2530 mono_atomic_store_release ((volatile float *) ptr, value);
2534 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2536 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2540 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2542 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2546 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2548 InterlockedWrite ((volatile gint32 *)ptr, value);
2552 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2554 #if SIZEOF_VOID_P == 4
2555 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2556 mono_interlocked_lock ();
2557 *(gint64*)ptr = value;
2558 mono_interlocked_unlock ();
2563 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2567 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2569 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2573 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2577 #if SIZEOF_VOID_P == 4
2578 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2579 mono_interlocked_lock ();
2580 *(double*)ptr = value;
2581 mono_interlocked_unlock ();
2588 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2592 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2598 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2602 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2604 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2608 free_context (void *user_data)
2610 ContextStaticData *data = user_data;
2612 mono_threads_lock ();
2615 * There is no guarantee that, by the point this reference queue callback
2616 * has been invoked, the GC handle associated with the object will fail to
2617 * resolve as one might expect. So if we don't free and remove the GC
2618 * handle here, free_context_static_data_helper () could end up resolving
2619 * a GC handle to an actually-dead context which would contain a pointer
2620 * to an already-freed static data segment, resulting in a crash when
2623 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2625 mono_threads_unlock ();
2627 mono_gchandle_free (data->gc_handle);
2628 mono_free_static_data (data->static_data);
2633 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2635 mono_threads_lock ();
2637 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2640 contexts = g_hash_table_new (NULL, NULL);
2643 context_queue = mono_gc_reference_queue_new (free_context);
2645 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2646 g_hash_table_insert (contexts, gch, gch);
2649 * We use this intermediate structure to contain a duplicate pointer to
2650 * the static data because we can't rely on being able to resolve the GC
2651 * handle in the reference queue callback.
2653 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2654 data->gc_handle = GPOINTER_TO_UINT (gch);
2657 context_adjust_static_data (ctx);
2658 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2660 mono_threads_unlock ();
2662 mono_profiler_context_loaded (ctx);
2666 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2669 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2670 * cleanup in exceptional circumstances, we don't actually do any
2671 * cleanup work here. We instead do this via a reference queue.
2674 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2676 mono_profiler_context_unloaded (ctx);
2680 mono_thread_init_tls (void)
2682 MONO_FAST_TLS_INIT (tls_current_object);
2683 mono_native_tls_alloc (¤t_object_key, NULL);
2686 void mono_thread_init (MonoThreadStartCB start_cb,
2687 MonoThreadAttachCB attach_cb)
2689 mono_coop_mutex_init_recursive (&threads_mutex);
2691 mono_os_mutex_init_recursive(&interlocked_mutex);
2692 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2694 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2695 g_assert(background_change_event != NULL);
2697 mono_init_static_data_info (&thread_static_info);
2698 mono_init_static_data_info (&context_static_info);
2700 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2702 mono_thread_start_cb = start_cb;
2703 mono_thread_attach_cb = attach_cb;
2705 /* Get a pseudo handle to the current process. This is just a
2706 * kludge so that wapi can build a process handle if needed.
2707 * As a pseudo handle is returned, we don't need to clean
2710 GetCurrentProcess ();
2713 void mono_thread_cleanup (void)
2715 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2716 MonoThreadInfo *info;
2718 /* The main thread must abandon any held mutexes (particularly
2719 * important for named mutexes as they are shared across
2720 * processes, see bug 74680.) This will happen when the
2721 * thread exits, but if it's not running in a subthread it
2722 * won't exit in time.
2724 info = mono_thread_info_current ();
2725 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2729 /* This stuff needs more testing, it seems one of these
2730 * critical sections can be locked when mono_thread_cleanup is
2733 mono_coop_mutex_destroy (&threads_mutex);
2734 mono_os_mutex_destroy (&interlocked_mutex);
2735 mono_os_mutex_destroy (&delayed_free_table_mutex);
2736 mono_os_mutex_destroy (&small_id_mutex);
2737 CloseHandle (background_change_event);
2740 mono_native_tls_free (current_object_key);
2744 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2746 mono_thread_cleanup_fn = func;
2750 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2752 thread->internal_thread->manage_callback = func;
2755 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2757 mono_thread_notify_pending_exc_fn = func;
2761 static void print_tids (gpointer key, gpointer value, gpointer user)
2763 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2764 * sizeof(uint) and a cast to uint would overflow
2766 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2767 * print this as a pointer.
2769 g_message ("Waiting for: %p", key);
2774 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2775 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2779 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2783 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2785 MONO_PREPARE_BLOCKING;
2786 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2787 MONO_FINISH_BLOCKING;
2789 if(ret==WAIT_FAILED) {
2790 /* See the comment in build_wait_tids() */
2791 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2795 for(i=0; i<wait->num; i++)
2796 CloseHandle (wait->handles[i]);
2798 if (ret == WAIT_TIMEOUT)
2801 for(i=0; i<wait->num; i++) {
2802 gsize tid = wait->threads[i]->tid;
2805 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2806 * it can still run io-layer etc. code. So wait for it to really exit.
2807 * FIXME: This won't join threads which are not in the joinable_hash yet.
2809 mono_thread_join ((gpointer)tid);
2811 mono_threads_lock ();
2812 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2813 /* This thread must have been killed, because
2814 * it hasn't cleaned itself up. (It's just
2815 * possible that the thread exited before the
2816 * parent thread had a chance to store the
2817 * handle, and now there is another pointer to
2818 * the already-exited thread stored. In this
2819 * case, we'll just get two
2820 * mono_profiler_thread_end() calls for the
2824 mono_threads_unlock ();
2825 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2826 thread_cleanup (wait->threads[i]);
2828 mono_threads_unlock ();
2833 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2835 guint32 i, ret, count;
2837 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2839 /* Add the thread state change event, so it wakes up if a thread changes
2840 * to background mode.
2843 if (count < MAXIMUM_WAIT_OBJECTS) {
2844 wait->handles [count] = background_change_event;
2848 MONO_PREPARE_BLOCKING;
2849 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2850 MONO_FINISH_BLOCKING;
2852 if(ret==WAIT_FAILED) {
2853 /* See the comment in build_wait_tids() */
2854 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2858 for(i=0; i<wait->num; i++)
2859 CloseHandle (wait->handles[i]);
2861 if (ret == WAIT_TIMEOUT)
2864 if (ret < wait->num) {
2865 gsize tid = wait->threads[ret]->tid;
2866 mono_threads_lock ();
2867 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2868 /* See comment in wait_for_tids about thread cleanup */
2869 mono_threads_unlock ();
2870 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2871 thread_cleanup (wait->threads [ret]);
2873 mono_threads_unlock ();
2877 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2879 struct wait_data *wait=(struct wait_data *)user;
2881 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2883 MonoInternalThread *thread=(MonoInternalThread *)value;
2885 /* Ignore background threads, we abort them later */
2886 /* Do not lock here since it is not needed and the caller holds threads_lock */
2887 if (thread->state & ThreadState_Background) {
2888 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2889 return; /* just leave, ignore */
2892 if (mono_gc_is_finalizer_internal_thread (thread)) {
2893 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2897 if (thread == mono_thread_internal_current ()) {
2898 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2902 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2903 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2907 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2908 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2912 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2913 if (handle == NULL) {
2914 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2918 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2919 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2920 wait->handles[wait->num]=handle;
2921 wait->threads[wait->num]=thread;
2924 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2926 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2931 /* Just ignore the rest, we can't do anything with
2938 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2940 struct wait_data *wait=(struct wait_data *)user;
2941 MonoNativeThreadId self = mono_native_thread_id_get ();
2942 MonoInternalThread *thread = (MonoInternalThread *)value;
2945 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2948 /* The finalizer thread is not a background thread */
2949 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
2950 && (thread->state & ThreadState_Background) != 0
2951 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
2953 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2957 /* printf ("A: %d\n", wait->num); */
2958 wait->handles[wait->num]=thread->handle;
2959 wait->threads[wait->num]=thread;
2962 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2963 mono_thread_internal_stop (thread);
2967 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
2968 && !mono_gc_is_finalizer_internal_thread (thread);
2972 * mono_threads_set_shutting_down:
2974 * Is called by a thread that wants to shut down Mono. If the runtime is already
2975 * shutting down, the calling thread is suspended/stopped, and this function never
2979 mono_threads_set_shutting_down (void)
2981 MonoInternalThread *current_thread = mono_thread_internal_current ();
2983 mono_threads_lock ();
2985 if (shutting_down) {
2986 mono_threads_unlock ();
2988 /* Make sure we're properly suspended/stopped */
2990 LOCK_THREAD (current_thread);
2992 if ((current_thread->state & ThreadState_SuspendRequested) ||
2993 (current_thread->state & ThreadState_AbortRequested) ||
2994 (current_thread->state & ThreadState_StopRequested)) {
2995 UNLOCK_THREAD (current_thread);
2996 mono_thread_execute_interruption ();
2998 current_thread->state |= ThreadState_Stopped;
2999 UNLOCK_THREAD (current_thread);
3002 /*since we're killing the thread, unset the current domain.*/
3003 mono_domain_unset ();
3005 /* Wake up other threads potentially waiting for us */
3006 mono_thread_info_exit ();
3008 shutting_down = TRUE;
3010 /* Not really a background state change, but this will
3011 * interrupt the main thread if it is waiting for all
3012 * the other threads.
3014 SetEvent (background_change_event);
3016 mono_threads_unlock ();
3020 void mono_thread_manage (void)
3022 struct wait_data wait_data;
3023 struct wait_data *wait = &wait_data;
3025 memset (wait, 0, sizeof (struct wait_data));
3026 /* join each thread that's still running */
3027 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3029 mono_threads_lock ();
3031 THREAD_DEBUG (g_message("%s: No threads", __func__));
3032 mono_threads_unlock ();
3035 mono_threads_unlock ();
3038 mono_threads_lock ();
3039 if (shutting_down) {
3040 /* somebody else is shutting down */
3041 mono_threads_unlock ();
3044 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3045 mono_g_hash_table_foreach (threads, print_tids, NULL));
3047 ResetEvent (background_change_event);
3049 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3050 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3051 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3052 mono_threads_unlock ();
3054 /* Something to wait for */
3055 wait_for_tids_or_state_change (wait, INFINITE);
3057 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3058 } while(wait->num>0);
3060 /* Mono is shutting down, so just wait for the end */
3061 if (!mono_runtime_try_shutdown ()) {
3062 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3063 mono_thread_suspend (mono_thread_internal_current ());
3064 mono_thread_execute_interruption ();
3068 * Remove everything but the finalizer thread and self.
3069 * Also abort all the background threads
3072 mono_threads_lock ();
3075 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3076 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3077 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3079 mono_threads_unlock ();
3081 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3083 /* Something to wait for */
3084 wait_for_tids (wait, INFINITE);
3086 } while (wait->num > 0);
3089 * give the subthreads a chance to really quit (this is mainly needed
3090 * to get correct user and system times from getrusage/wait/time(1)).
3091 * This could be removed if we avoid pthread_detach() and use pthread_join().
3093 mono_thread_info_yield ();
3097 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3099 MonoInternalThread *thread = (MonoInternalThread*)value;
3100 struct wait_data *wait = (struct wait_data*)user_data;
3104 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3106 * This needs no locking.
3108 if ((thread->state & ThreadState_Suspended) != 0 ||
3109 (thread->state & ThreadState_Stopped) != 0)
3112 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3113 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3117 wait->handles [wait->num] = handle;
3118 wait->threads [wait->num] = thread;
3124 * mono_thread_suspend_all_other_threads:
3126 * Suspend all managed threads except the finalizer thread and this thread. It is
3127 * not possible to resume them later.
3129 void mono_thread_suspend_all_other_threads (void)
3131 struct wait_data wait_data;
3132 struct wait_data *wait = &wait_data;
3134 MonoNativeThreadId self = mono_native_thread_id_get ();
3135 guint32 eventidx = 0;
3136 gboolean starting, finished;
3138 memset (wait, 0, sizeof (struct wait_data));
3140 * The other threads could be in an arbitrary state at this point, i.e.
3141 * they could be starting up, shutting down etc. This means that there could be
3142 * threads which are not even in the threads hash table yet.
3146 * First we set a barrier which will be checked by all threads before they
3147 * are added to the threads hash table, and they will exit if the flag is set.
3148 * This ensures that no threads could be added to the hash later.
3149 * We will use shutting_down as the barrier for now.
3151 g_assert (shutting_down);
3154 * We make multiple calls to WaitForMultipleObjects since:
3155 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3156 * - some threads could exit without becoming suspended
3161 * Make a copy of the hashtable since we can't do anything with
3162 * threads while threads_mutex is held.
3165 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3166 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3167 mono_threads_lock ();
3168 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3169 mono_threads_unlock ();
3172 /* Get the suspended events that we'll be waiting for */
3173 for (i = 0; i < wait->num; ++i) {
3174 MonoInternalThread *thread = wait->threads [i];
3176 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3177 || mono_gc_is_finalizer_internal_thread (thread)
3178 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3180 //CloseHandle (wait->handles [i]);
3181 wait->threads [i] = NULL; /* ignore this thread in next loop */
3185 LOCK_THREAD (thread);
3187 if ((thread->state & ThreadState_Suspended) != 0 ||
3188 (thread->state & ThreadState_StopRequested) != 0 ||
3189 (thread->state & ThreadState_Stopped) != 0) {
3190 UNLOCK_THREAD (thread);
3191 CloseHandle (wait->handles [i]);
3192 wait->threads [i] = NULL; /* ignore this thread in next loop */
3198 /* Convert abort requests into suspend requests */
3199 if ((thread->state & ThreadState_AbortRequested) != 0)
3200 thread->state &= ~ThreadState_AbortRequested;
3202 thread->state |= ThreadState_SuspendRequested;
3204 UNLOCK_THREAD (thread);
3206 /* Signal the thread to suspend */
3207 suspend_thread_internal (thread, TRUE);
3209 if (eventidx <= 0) {
3211 * If there are threads which are starting up, we wait until they
3212 * are suspended when they try to register in the threads hash.
3213 * This is guaranteed to finish, since the threads which can create new
3214 * threads get suspended after a while.
3215 * FIXME: The finalizer thread can still create new threads.
3217 mono_threads_lock ();
3218 if (threads_starting_up)
3219 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3222 mono_threads_unlock ();
3224 mono_thread_info_sleep (100, NULL);
3232 MonoInternalThread *thread;
3233 MonoStackFrameInfo *frames;
3234 int nframes, max_frames;
3235 int nthreads, max_threads;
3236 MonoInternalThread **threads;
3237 } ThreadDumpUserData;
3239 static gboolean thread_dump_requested;
3241 /* This needs to be async safe */
3243 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3245 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3247 if (ud->nframes < ud->max_frames) {
3248 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3255 /* This needs to be async safe */
3256 static SuspendThreadResult
3257 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3259 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3260 MonoInternalThread *thread = user_data->thread;
3263 /* This no longer works with remote unwinding */
3265 wapi_desc = wapi_current_thread_desc ();
3266 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3271 if (thread == mono_thread_internal_current ())
3272 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3274 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3276 return MonoResumeThread;
3280 int nthreads, max_threads;
3281 MonoInternalThread **threads;
3282 } CollectThreadsUserData;
3285 collect_thread (gpointer key, gpointer value, gpointer user)
3287 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3288 MonoInternalThread *thread = (MonoInternalThread *)value;
3290 if (ud->nthreads < ud->max_threads)
3291 ud->threads [ud->nthreads ++] = thread;
3295 * Collect running threads into the THREADS array.
3296 * THREADS should be an array allocated on the stack.
3299 collect_threads (MonoInternalThread **thread_array, int max_threads)
3301 CollectThreadsUserData ud;
3303 memset (&ud, 0, sizeof (ud));
3304 /* This array contains refs, but its on the stack, so its ok */
3305 ud.threads = thread_array;
3306 ud.max_threads = max_threads;
3308 mono_threads_lock ();
3309 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3310 mono_threads_unlock ();
3316 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3318 GString* text = g_string_new (0);
3320 GError *error = NULL;
3323 ud->thread = thread;
3326 /* Collect frames for the thread */
3327 if (thread == mono_thread_internal_current ()) {
3328 get_thread_dump (mono_thread_info_current (), ud);
3330 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3334 * Do all the non async-safe work outside of get_thread_dump.
3337 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3339 g_string_append_printf (text, "\n\"%s\"", name);
3342 else if (thread->threadpool_thread) {
3343 g_string_append (text, "\n\"<threadpool thread>\"");
3345 g_string_append (text, "\n\"<unnamed thread>\"");
3348 for (i = 0; i < ud->nframes; ++i) {
3349 MonoStackFrameInfo *frame = &ud->frames [i];
3350 MonoMethod *method = NULL;
3352 if (frame->type == FRAME_TYPE_MANAGED)
3353 method = mono_jit_info_get_method (frame->ji);
3356 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3357 g_string_append_printf (text, " %s\n", location);
3360 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3364 fprintf (stdout, "%s", text->str);
3366 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3367 OutputDebugStringA(text->str);
3370 g_string_free (text, TRUE);
3375 mono_threads_perform_thread_dump (void)
3377 ThreadDumpUserData ud;
3378 MonoInternalThread *thread_array [128];
3379 int tindex, nthreads;
3381 if (!thread_dump_requested)
3384 printf ("Full thread dump:\n");
3386 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3387 nthreads = collect_threads (thread_array, 128);
3389 memset (&ud, 0, sizeof (ud));
3390 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3391 ud.max_frames = 256;
3393 for (tindex = 0; tindex < nthreads; ++tindex)
3394 dump_thread (thread_array [tindex], &ud);
3398 thread_dump_requested = FALSE;
3401 /* Obtain the thread dump of all threads */
3403 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3405 ThreadDumpUserData ud;
3406 MonoInternalThread *thread_array [128];
3407 MonoDomain *domain = mono_domain_get ();
3408 MonoDebugSourceLocation *location;
3409 int tindex, nthreads;
3411 *out_threads = NULL;
3412 *out_stack_frames = NULL;
3414 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3415 nthreads = collect_threads (thread_array, 128);
3417 memset (&ud, 0, sizeof (ud));
3418 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3419 ud.max_frames = 256;
3421 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3422 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3424 for (tindex = 0; tindex < nthreads; ++tindex) {
3425 MonoInternalThread *thread = thread_array [tindex];
3426 MonoArray *thread_frames;
3432 /* Collect frames for the thread */
3433 if (thread == mono_thread_internal_current ()) {
3434 get_thread_dump (mono_thread_info_current (), &ud);
3436 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3439 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3441 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3442 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3444 for (i = 0; i < ud.nframes; ++i) {
3445 MonoStackFrameInfo *frame = &ud.frames [i];
3446 MonoMethod *method = NULL;
3447 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
3449 sf->native_offset = frame->native_offset;
3451 if (frame->type == FRAME_TYPE_MANAGED)
3452 method = mono_jit_info_get_method (frame->ji);
3455 sf->method_address = (gsize) frame->ji->code_start;
3457 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3459 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3461 sf->il_offset = location->il_offset;
3463 if (location && location->source_file) {
3464 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3465 sf->line = location->row;
3466 sf->column = location->column;
3468 mono_debug_free_source_location (location);
3473 mono_array_setref (thread_frames, i, sf);
3481 * mono_threads_request_thread_dump:
3483 * Ask all threads except the current to print their stacktrace to stdout.
3486 mono_threads_request_thread_dump (void)
3488 /*The new thread dump code runs out of the finalizer thread. */
3489 thread_dump_requested = TRUE;
3490 mono_gc_finalize_notify ();
3495 gint allocated; /* +1 so that refs [allocated] == NULL */
3499 typedef struct ref_stack RefStack;
3502 ref_stack_new (gint initial_size)
3506 initial_size = MAX (initial_size, 16) + 1;
3507 rs = g_new0 (RefStack, 1);
3508 rs->refs = g_new0 (gpointer, initial_size);
3509 rs->allocated = initial_size;
3514 ref_stack_destroy (gpointer ptr)
3516 RefStack *rs = (RefStack *)ptr;
3525 ref_stack_push (RefStack *rs, gpointer ptr)
3527 g_assert (rs != NULL);
3529 if (rs->bottom >= rs->allocated) {
3530 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3531 rs->allocated <<= 1;
3532 rs->refs [rs->allocated] = NULL;
3534 rs->refs [rs->bottom++] = ptr;
3538 ref_stack_pop (RefStack *rs)
3540 if (rs == NULL || rs->bottom == 0)
3544 rs->refs [rs->bottom] = NULL;
3548 ref_stack_find (RefStack *rs, gpointer ptr)
3555 for (refs = rs->refs; refs && *refs; refs++) {
3563 * mono_thread_push_appdomain_ref:
3565 * Register that the current thread may have references to objects in domain
3566 * @domain on its stack. Each call to this function should be paired with a
3567 * call to pop_appdomain_ref.
3570 mono_thread_push_appdomain_ref (MonoDomain *domain)
3572 MonoInternalThread *thread = mono_thread_internal_current ();
3575 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3576 SPIN_LOCK (thread->lock_thread_id);
3577 if (thread->appdomain_refs == NULL)
3578 thread->appdomain_refs = ref_stack_new (16);
3579 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3580 SPIN_UNLOCK (thread->lock_thread_id);
3585 mono_thread_pop_appdomain_ref (void)
3587 MonoInternalThread *thread = mono_thread_internal_current ();
3590 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3591 SPIN_LOCK (thread->lock_thread_id);
3592 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3593 SPIN_UNLOCK (thread->lock_thread_id);
3598 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3601 SPIN_LOCK (thread->lock_thread_id);
3602 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3603 SPIN_UNLOCK (thread->lock_thread_id);
3608 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3610 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3613 typedef struct abort_appdomain_data {
3614 struct wait_data wait;
3616 } abort_appdomain_data;
3619 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3621 MonoInternalThread *thread = (MonoInternalThread*)value;
3622 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3623 MonoDomain *domain = data->domain;
3625 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3626 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3628 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3629 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3632 data->wait.handles [data->wait.num] = handle;
3633 data->wait.threads [data->wait.num] = thread;
3636 /* Just ignore the rest, we can't do anything with
3644 * mono_threads_abort_appdomain_threads:
3646 * Abort threads which has references to the given appdomain.
3649 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3651 #ifdef __native_client__
3655 abort_appdomain_data user_data;
3657 int orig_timeout = timeout;
3660 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3662 start_time = mono_msec_ticks ();
3664 mono_threads_lock ();
3666 user_data.domain = domain;
3667 user_data.wait.num = 0;
3668 /* This shouldn't take any locks */
3669 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3670 mono_threads_unlock ();
3672 if (user_data.wait.num > 0) {
3673 /* Abort the threads outside the threads lock */
3674 for (i = 0; i < user_data.wait.num; ++i)
3675 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3678 * We should wait for the threads either to abort, or to leave the
3679 * domain. We can't do the latter, so we wait with a timeout.
3681 wait_for_tids (&user_data.wait, 100);
3684 /* Update remaining time */
3685 timeout -= mono_msec_ticks () - start_time;
3686 start_time = mono_msec_ticks ();
3688 if (orig_timeout != -1 && timeout < 0)
3691 while (user_data.wait.num > 0);
3693 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3699 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3701 MonoInternalThread *thread = (MonoInternalThread*)value;
3702 MonoDomain *domain = (MonoDomain*)user_data;
3705 /* No locking needed here */
3706 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3708 if (thread->cached_culture_info) {
3709 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3710 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3711 if (obj && obj->vtable->domain == domain)
3712 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3718 * mono_threads_clear_cached_culture:
3720 * Clear the cached_current_culture from all threads if it is in the
3724 mono_threads_clear_cached_culture (MonoDomain *domain)
3726 mono_threads_lock ();
3727 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3728 mono_threads_unlock ();
3732 * mono_thread_get_undeniable_exception:
3734 * Return an exception which needs to be raised when leaving a catch clause.
3735 * This is used for undeniable exception propagation.
3738 mono_thread_get_undeniable_exception (void)
3740 MonoInternalThread *thread = mono_thread_internal_current ();
3742 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3744 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3745 * exception if the thread no longer references a dying appdomain.
3747 thread->abort_exc->trace_ips = NULL;
3748 thread->abort_exc->stack_trace = NULL;
3749 return thread->abort_exc;
3755 #if MONO_SMALL_CONFIG
3756 #define NUM_STATIC_DATA_IDX 4
3757 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3761 #define NUM_STATIC_DATA_IDX 8
3762 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3763 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3767 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3768 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3771 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3773 gpointer *static_data = (gpointer *)addr;
3775 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3776 void **ptr = (void **)static_data [i];
3781 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3782 void **p = ptr + idx;
3785 mark_func ((MonoObject**)p, gc_data);
3791 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3793 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3797 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3799 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3803 * mono_alloc_static_data
3805 * Allocate memory blocks for storing threads or context static data
3808 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3810 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3813 gpointer* static_data = *static_data_ptr;
3815 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3816 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3818 if (mono_gc_user_markers_supported ()) {
3819 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3820 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3822 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3823 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3826 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3827 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3828 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3829 *static_data_ptr = static_data;
3830 static_data [0] = static_data;
3833 for (i = 1; i <= idx; ++i) {
3834 if (static_data [i])
3837 if (mono_gc_user_markers_supported ())
3838 static_data [i] = g_malloc0 (static_data_size [i]);
3840 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3841 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3842 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3847 mono_free_static_data (gpointer* static_data)
3850 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3851 gpointer p = static_data [i];
3855 * At this point, the static data pointer array is still registered with the
3856 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3857 * data. Freeing the individual arrays without first nulling their slots
3858 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3859 * such an already freed array. See bug #13813.
3861 static_data [i] = NULL;
3862 mono_memory_write_barrier ();
3863 if (mono_gc_user_markers_supported ())
3866 mono_gc_free_fixed (p);
3868 mono_gc_free_fixed (static_data);
3872 * mono_init_static_data_info
3874 * Initializes static data counters
3876 static void mono_init_static_data_info (StaticDataInfo *static_data)
3878 static_data->idx = 0;
3879 static_data->offset = 0;
3880 static_data->freelist = NULL;
3884 * mono_alloc_static_data_slot
3886 * Generates an offset for static data. static_data contains the counters
3887 * used to generate it.
3890 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3892 if (!static_data->idx && !static_data->offset) {
3894 * we use the first chunk of the first allocation also as
3895 * an array for the rest of the data
3897 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3899 static_data->offset += align - 1;
3900 static_data->offset &= ~(align - 1);
3901 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3902 static_data->idx ++;
3903 g_assert (size <= static_data_size [static_data->idx]);
3904 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3905 static_data->offset = 0;
3907 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
3908 static_data->offset += size;
3913 * ensure thread static fields already allocated are valid for thread
3914 * This function is called when a thread is created or on thread attach.
3917 thread_adjust_static_data (MonoInternalThread *thread)
3919 mono_threads_lock ();
3920 if (thread_static_info.offset || thread_static_info.idx > 0) {
3921 /* get the current allocated size */
3922 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
3923 mono_alloc_static_data (&thread->static_data, offset, TRUE);
3925 mono_threads_unlock ();
3929 * LOCKING: requires that threads_mutex is held
3932 context_adjust_static_data (MonoAppContext *ctx)
3934 if (context_static_info.offset || context_static_info.idx > 0) {
3935 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
3936 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3937 ctx->data->static_data = ctx->static_data;
3942 * LOCKING: requires that threads_mutex is held
3945 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3947 MonoInternalThread *thread = (MonoInternalThread *)value;
3948 guint32 offset = GPOINTER_TO_UINT (user);
3950 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3954 * LOCKING: requires that threads_mutex is held
3957 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
3959 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
3964 guint32 offset = GPOINTER_TO_UINT (user);
3965 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3966 ctx->data->static_data = ctx->static_data;
3969 static StaticDataFreeList*
3970 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3972 StaticDataFreeList* prev = NULL;
3973 StaticDataFreeList* tmp = static_data->freelist;
3975 if (tmp->size == size) {
3977 prev->next = tmp->next;
3979 static_data->freelist = tmp->next;
3988 #if SIZEOF_VOID_P == 4
3995 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
3997 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3999 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4000 MonoBitSet *rb = sets [idx];
4001 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4002 offset /= sizeof (uintptr_t);
4003 /* offset is now the bitmap offset */
4004 for (int i = 0; i < numbits; ++i) {
4005 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4006 mono_bitset_set_fast (rb, offset + i);
4011 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4013 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4014 MonoBitSet *rb = sets [idx];
4015 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4016 offset /= sizeof (uintptr_t);
4017 /* offset is now the bitmap offset */
4018 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4019 mono_bitset_clear_fast (rb, offset + i);
4023 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4025 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4027 StaticDataInfo *info;
4030 if (static_type == SPECIAL_STATIC_THREAD) {
4031 info = &thread_static_info;
4032 sets = thread_reference_bitmaps;
4034 info = &context_static_info;
4035 sets = context_reference_bitmaps;
4038 mono_threads_lock ();
4040 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4044 offset = item->offset;
4047 offset = mono_alloc_static_data_slot (info, size, align);
4050 update_reference_bitmap (sets, offset, bitmap, numbits);
4052 if (static_type == SPECIAL_STATIC_THREAD) {
4053 /* This can be called during startup */
4054 if (threads != NULL)
4055 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4057 if (contexts != NULL)
4058 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4060 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4063 mono_threads_unlock ();
4069 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4071 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4073 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4074 return get_thread_static_data (thread, offset);
4076 return get_context_static_data (thread->current_appcontext, offset);
4081 mono_get_special_static_data (guint32 offset)
4083 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4092 * LOCKING: requires that threads_mutex is held
4095 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4097 MonoInternalThread *thread = (MonoInternalThread *)value;
4098 OffsetSize *data = (OffsetSize *)user;
4099 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4100 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4103 if (!thread->static_data || !thread->static_data [idx])
4105 ptr = ((char*) thread->static_data [idx]) + off;
4106 mono_gc_bzero_atomic (ptr, data->size);
4110 * LOCKING: requires that threads_mutex is held
4113 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4115 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4120 OffsetSize *data = (OffsetSize *)user;
4121 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4122 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4125 if (!ctx->static_data || !ctx->static_data [idx])
4128 ptr = ((char*) ctx->static_data [idx]) + off;
4129 mono_gc_bzero_atomic (ptr, data->size);
4133 do_free_special_slot (guint32 offset, guint32 size)
4135 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4137 StaticDataInfo *info;
4139 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4140 info = &thread_static_info;
4141 sets = thread_reference_bitmaps;
4143 info = &context_static_info;
4144 sets = context_reference_bitmaps;
4147 guint32 data_offset = offset;
4148 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4149 OffsetSize data = { data_offset, size };
4151 clear_reference_bitmap (sets, data.offset, data.size);
4153 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4154 if (threads != NULL)
4155 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4157 if (contexts != NULL)
4158 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4161 if (!mono_runtime_is_shutting_down ()) {
4162 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4164 item->offset = offset;
4167 item->next = info->freelist;
4168 info->freelist = item;
4173 do_free_special (gpointer key, gpointer value, gpointer data)
4175 MonoClassField *field = (MonoClassField *)key;
4176 guint32 offset = GPOINTER_TO_UINT (value);
4179 size = mono_type_size (field->type, &align);
4180 do_free_special_slot (offset, size);
4184 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4186 mono_threads_lock ();
4188 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4190 mono_threads_unlock ();
4194 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4196 /* Only ever called for ThreadLocal instances */
4197 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4199 mono_threads_lock ();
4200 do_free_special_slot (offset, size);
4201 mono_threads_unlock ();
4205 static void CALLBACK dummy_apc (ULONG_PTR param)
4211 * mono_thread_execute_interruption
4213 * Performs the operation that the requested thread state requires (abort,
4216 static MonoException*
4217 mono_thread_execute_interruption (void)
4219 MonoInternalThread *thread = mono_thread_internal_current ();
4221 LOCK_THREAD (thread);
4223 /* MonoThread::interruption_requested can only be changed with atomics */
4224 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4225 /* this will consume pending APC calls */
4227 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4229 InterlockedDecrement (&thread_interruption_requested);
4231 /* Clear the interrupted flag of the thread so it can wait again */
4232 mono_thread_info_clear_self_interrupt ();
4235 if ((thread->state & ThreadState_AbortRequested) != 0) {
4236 UNLOCK_THREAD (thread);
4237 if (thread->abort_exc == NULL) {
4239 * This might be racy, but it has to be called outside the lock
4240 * since it calls managed code.
4242 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4244 return thread->abort_exc;
4246 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4247 self_suspend_internal (thread);
4250 else if ((thread->state & ThreadState_StopRequested) != 0) {
4251 /* FIXME: do this through the JIT? */
4253 UNLOCK_THREAD (thread);
4255 mono_thread_exit ();
4257 } else if (thread->pending_exception) {
4260 exc = thread->pending_exception;
4261 thread->pending_exception = NULL;
4263 UNLOCK_THREAD (thread);
4265 } else if (thread->thread_interrupt_requested) {
4267 thread->thread_interrupt_requested = FALSE;
4268 UNLOCK_THREAD (thread);
4270 return(mono_get_exception_thread_interrupted ());
4273 UNLOCK_THREAD (thread);
4279 * mono_thread_request_interruption
4281 * A signal handler can call this method to request the interruption of a
4282 * thread. The result of the interruption will depend on the current state of
4283 * the thread. If the result is an exception that needs to be throw, it is
4284 * provided as return value.
4287 mono_thread_request_interruption (gboolean running_managed)
4289 MonoInternalThread *thread = mono_thread_internal_current ();
4291 /* The thread may already be stopping */
4296 if (thread->interrupt_on_stop &&
4297 thread->state & ThreadState_StopRequested &&
4298 thread->state & ThreadState_Background)
4302 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4304 InterlockedIncrement (&thread_interruption_requested);
4306 if (!running_managed || is_running_protected_wrapper ()) {
4307 /* Can't stop while in unmanaged code. Increase the global interruption
4308 request count. When exiting the unmanaged method the count will be
4309 checked and the thread will be interrupted. */
4311 if (mono_thread_notify_pending_exc_fn && !running_managed)
4312 /* The JIT will notify the thread about the interruption */
4313 /* This shouldn't take any locks */
4314 mono_thread_notify_pending_exc_fn (NULL);
4316 /* this will awake the thread if it is in WaitForSingleObject
4318 /* Our implementation of this function ignores the func argument */
4320 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4322 mono_thread_info_self_interrupt ();
4327 return mono_thread_execute_interruption ();
4331 /*This function should be called by a thread after it has exited all of
4332 * its handle blocks at interruption time.*/
4334 mono_thread_resume_interruption (void)
4336 MonoInternalThread *thread = mono_thread_internal_current ();
4337 gboolean still_aborting;
4339 /* The thread may already be stopping */
4343 LOCK_THREAD (thread);
4344 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4345 UNLOCK_THREAD (thread);
4347 /*This can happen if the protected block called Thread::ResetAbort*/
4348 if (!still_aborting)
4351 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4353 InterlockedIncrement (&thread_interruption_requested);
4355 mono_thread_info_self_interrupt ();
4357 return mono_thread_execute_interruption ();
4360 gboolean mono_thread_interruption_requested ()
4362 if (thread_interruption_requested) {
4363 MonoInternalThread *thread = mono_thread_internal_current ();
4364 /* The thread may already be stopping */
4366 return (thread->interruption_requested);
4371 static MonoException*
4372 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4374 MonoInternalThread *thread = mono_thread_internal_current ();
4376 /* The thread may already be stopping */
4380 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4381 MonoException* exc = mono_thread_execute_interruption ();
4389 * Performs the interruption of the current thread, if one has been requested,
4390 * and the thread is not running a protected wrapper.
4391 * Return the exception which needs to be thrown, if any.
4394 mono_thread_interruption_checkpoint (void)
4396 return mono_thread_interruption_checkpoint_request (FALSE);
4400 * Performs the interruption of the current thread, if one has been requested.
4401 * Return the exception which needs to be thrown, if any.
4404 mono_thread_force_interruption_checkpoint_noraise (void)
4406 return mono_thread_interruption_checkpoint_request (TRUE);
4410 * Performs the interruption of the current thread, if one has been requested.
4411 * Throw the exception which needs to be thrown, if any.
4414 mono_thread_force_interruption_checkpoint (void)
4418 ex = mono_thread_interruption_checkpoint_request (TRUE);
4420 mono_raise_exception (ex);
4424 * mono_thread_get_and_clear_pending_exception:
4426 * Return any pending exceptions for the current thread and clear it as a side effect.
4429 mono_thread_get_and_clear_pending_exception (void)
4431 MonoInternalThread *thread = mono_thread_internal_current ();
4433 /* The thread may already be stopping */
4437 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4438 return mono_thread_execute_interruption ();
4441 if (thread->pending_exception) {
4442 MonoException *exc = thread->pending_exception;
4444 thread->pending_exception = NULL;
4452 * mono_set_pending_exception:
4454 * Set the pending exception of the current thread to EXC.
4455 * The exception will be thrown when execution returns to managed code.
4458 mono_set_pending_exception (MonoException *exc)
4460 MonoInternalThread *thread = mono_thread_internal_current ();
4462 /* The thread may already be stopping */
4466 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4468 mono_thread_request_interruption (FALSE);
4472 * mono_thread_interruption_request_flag:
4474 * Returns the address of a flag that will be non-zero if an interruption has
4475 * been requested for a thread. The thread to interrupt may not be the current
4476 * thread, so an additional call to mono_thread_interruption_requested() or
4477 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4480 gint32* mono_thread_interruption_request_flag ()
4482 return &thread_interruption_requested;
4486 mono_thread_init_apartment_state (void)
4489 MonoInternalThread* thread = mono_thread_internal_current ();
4491 /* Positive return value indicates success, either
4492 * S_OK if this is first CoInitialize call, or
4493 * S_FALSE if CoInitialize already called, but with same
4494 * threading model. A negative value indicates failure,
4495 * probably due to trying to change the threading model.
4497 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4498 ? COINIT_APARTMENTTHREADED
4499 : COINIT_MULTITHREADED) < 0) {
4500 thread->apartment_state = ThreadApartmentState_Unknown;
4506 mono_thread_cleanup_apartment_state (void)
4509 MonoInternalThread* thread = mono_thread_internal_current ();
4511 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4518 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4520 LOCK_THREAD (thread);
4521 thread->state |= state;
4522 UNLOCK_THREAD (thread);
4526 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4528 LOCK_THREAD (thread);
4529 thread->state &= ~state;
4530 UNLOCK_THREAD (thread);
4534 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4536 gboolean ret = FALSE;
4538 LOCK_THREAD (thread);
4540 if ((thread->state & test) != 0) {
4544 UNLOCK_THREAD (thread);
4549 static gboolean has_tls_get = FALSE;
4552 mono_runtime_set_has_tls_get (gboolean val)
4558 mono_runtime_has_tls_get (void)
4564 self_interrupt_thread (void *_unused)
4566 MonoThreadInfo *info = mono_thread_info_current ();
4567 MonoException *exc = mono_thread_execute_interruption ();
4568 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4569 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. */
4570 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4574 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4578 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4582 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4584 MonoJitInfo **dest = (MonoJitInfo **)data;
4590 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4592 MonoJitInfo *ji = NULL;
4595 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4600 MonoInternalThread *thread;
4601 gboolean install_async_abort;
4602 MonoThreadInfoInterruptToken *interrupt_token;
4605 static SuspendThreadResult
4606 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4608 AbortThreadData *data = (AbortThreadData *)ud;
4609 MonoInternalThread *thread = data->thread;
4610 MonoJitInfo *ji = NULL;
4611 gboolean protected_wrapper;
4612 gboolean running_managed;
4614 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4615 return MonoResumeThread;
4617 /*someone is already interrupting it*/
4618 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4619 return MonoResumeThread;
4621 InterlockedIncrement (&thread_interruption_requested);
4623 ji = mono_thread_info_get_last_managed (info);
4624 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4625 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4627 if (!protected_wrapper && running_managed) {
4628 /*We are in managed code*/
4629 /*Set the thread to call */
4630 if (data->install_async_abort)
4631 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4632 return MonoResumeThread;
4634 if (mono_thread_notify_pending_exc_fn)
4635 /* The JIT will notify the thread about the interruption */
4636 mono_thread_notify_pending_exc_fn (info);
4639 * This will cause waits to be broken.
4640 * It will also prevent the thread from entering a wait, so if the thread returns
4641 * from the wait before it receives the abort signal, it will just spin in the wait
4642 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4645 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4647 return MonoResumeThread;
4652 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4654 AbortThreadData data = { 0 };
4655 data.thread = thread;
4656 data.install_async_abort = install_async_abort;
4659 FIXME this is insanely broken, it doesn't cause interruption to happen
4660 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4662 if (thread == mono_thread_internal_current ()) {
4663 /* Do it synchronously */
4664 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4666 mono_raise_exception (exc);
4668 mono_thread_info_self_interrupt ();
4673 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4674 if (data.interrupt_token)
4675 mono_thread_info_finish_interrupt (data.interrupt_token);
4676 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4680 MonoInternalThread *thread;
4682 MonoThreadInfoInterruptToken *interrupt_token;
4683 } SuspendThreadData;
4685 static SuspendThreadResult
4686 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4688 SuspendThreadData *data = (SuspendThreadData *)ud;
4689 MonoInternalThread *thread = data->thread;
4690 MonoJitInfo *ji = NULL;
4691 gboolean protected_wrapper;
4692 gboolean running_managed;
4694 ji = mono_thread_info_get_last_managed (info);
4695 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4696 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4698 if (running_managed && !protected_wrapper) {
4699 thread->state &= ~ThreadState_SuspendRequested;
4700 thread->state |= ThreadState_Suspended;
4701 return KeepSuspended;
4703 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4704 InterlockedIncrement (&thread_interruption_requested);
4705 if (data->interrupt)
4706 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4708 if (mono_thread_notify_pending_exc_fn && !running_managed)
4709 /* The JIT will notify the thread about the interruption */
4710 mono_thread_notify_pending_exc_fn (info);
4711 return MonoResumeThread;
4716 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4718 LOCK_THREAD (thread);
4719 if (thread == mono_thread_internal_current ()) {
4720 mono_thread_info_begin_self_suspend ();
4721 //XXX replace this with better named functions
4722 thread->state &= ~ThreadState_SuspendRequested;
4723 thread->state |= ThreadState_Suspended;
4724 UNLOCK_THREAD (thread);
4725 mono_thread_info_end_self_suspend ();
4727 SuspendThreadData data = { 0 };
4728 data.thread = thread;
4729 data.interrupt = interrupt;
4731 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4732 if (data.interrupt_token)
4733 mono_thread_info_finish_interrupt (data.interrupt_token);
4734 UNLOCK_THREAD (thread);
4738 /*This is called with @thread synch_cs held and it must release it*/
4740 self_suspend_internal (MonoInternalThread *thread)
4742 mono_thread_info_begin_self_suspend ();
4743 thread->state &= ~ThreadState_SuspendRequested;
4744 thread->state |= ThreadState_Suspended;
4745 UNLOCK_THREAD (thread);
4746 mono_thread_info_end_self_suspend ();
4751 * mono_thread_is_foreign:
4752 * @thread: the thread to query
4754 * This function allows one to determine if a thread was created by the mono runtime and has
4755 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4757 * Returns: true if @thread was not created by the runtime.
4760 mono_thread_is_foreign (MonoThread *thread)
4762 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4763 return info->runtime_thread == FALSE;
4767 * mono_add_joinable_thread:
4769 * Add TID to the list of joinable threads.
4770 * LOCKING: Acquires the threads lock.
4773 mono_threads_add_joinable_thread (gpointer tid)
4777 * We cannot detach from threads because it causes problems like
4778 * 2fd16f60/r114307. So we collect them and join them when
4779 * we have time (in he finalizer thread).
4781 joinable_threads_lock ();
4782 if (!joinable_threads)
4783 joinable_threads = g_hash_table_new (NULL, NULL);
4784 g_hash_table_insert (joinable_threads, tid, tid);
4785 joinable_thread_count ++;
4786 joinable_threads_unlock ();
4788 mono_gc_finalize_notify ();
4793 * mono_threads_join_threads:
4795 * Join all joinable threads. This is called from the finalizer thread.
4796 * LOCKING: Acquires the threads lock.
4799 mono_threads_join_threads (void)
4802 GHashTableIter iter;
4809 if (!joinable_thread_count)
4813 joinable_threads_lock ();
4815 if (g_hash_table_size (joinable_threads)) {
4816 g_hash_table_iter_init (&iter, joinable_threads);
4817 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4818 thread = (pthread_t)tid;
4819 g_hash_table_remove (joinable_threads, key);
4820 joinable_thread_count --;
4823 joinable_threads_unlock ();
4825 if (thread != pthread_self ())
4826 /* This shouldn't block */
4827 pthread_join (thread, NULL);
4838 * Wait for thread TID to exit.
4839 * LOCKING: Acquires the threads lock.
4842 mono_thread_join (gpointer tid)
4846 gboolean found = FALSE;
4848 joinable_threads_lock ();
4849 if (!joinable_threads)
4850 joinable_threads = g_hash_table_new (NULL, NULL);
4851 if (g_hash_table_lookup (joinable_threads, tid)) {
4852 g_hash_table_remove (joinable_threads, tid);
4853 joinable_thread_count --;
4856 joinable_threads_unlock ();
4859 thread = (pthread_t)tid;
4860 pthread_join (thread, NULL);
4865 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4867 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4868 mono_thread_interruption_checkpoint ();
4871 static inline gboolean
4872 is_appdomainunloaded_exception (MonoClass *klass)
4874 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4876 if (!app_domain_unloaded_exception_klass)
4877 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4878 g_assert (app_domain_unloaded_exception_klass);
4880 return klass == app_domain_unloaded_exception_klass;
4883 static inline gboolean
4884 is_threadabort_exception (MonoClass *klass)
4886 return klass == mono_defaults.threadabortexception_class;
4890 mono_thread_internal_unhandled_exception (MonoObject* exc)
4892 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4893 MonoClass *klass = exc->vtable->klass;
4894 if (is_threadabort_exception (klass)) {
4895 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4896 } else if (!is_appdomainunloaded_exception (klass)) {
4897 mono_unhandled_exception (exc);
4898 if (mono_environment_exitcode_get () == 1)
4905 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4907 mono_threads_get_thread_dump (out_threads, out_stack_traces);