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)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
44 #include <mono/utils/mono-threads-coop.h>
45 #include <mono/utils/mono-error-internals.h>
47 #include <mono/metadata/gc-internals.h>
48 #include <mono/metadata/reflection-internals.h>
54 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
55 #define USE_TKILL_ON_ANDROID 1
58 #ifdef PLATFORM_ANDROID
61 #ifdef USE_TKILL_ON_ANDROID
62 extern int tkill (pid_t tid, int signal);
66 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
67 #define THREAD_DEBUG(a)
68 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
69 #define THREAD_WAIT_DEBUG(a)
70 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
71 #define LIBGC_DEBUG(a)
73 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
74 #define SPIN_LOCK(i) do { \
75 if (SPIN_TRYLOCK (i)) \
79 #define SPIN_UNLOCK(i) i = 0
81 #define LOCK_THREAD(thread) lock_thread((thread))
82 #define UNLOCK_THREAD(thread) unlock_thread((thread))
86 guint32 (*func)(void *);
102 typedef struct _StaticDataFreeList StaticDataFreeList;
103 struct _StaticDataFreeList {
104 StaticDataFreeList *next;
112 StaticDataFreeList *freelist;
115 /* Number of cached culture objects in the MonoThread->cached_culture_info array
116 * (per-type): we use the first NUM entries for CultureInfo and the last for
117 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
119 #define NUM_CACHED_CULTURES 4
120 #define CULTURES_START_IDX 0
121 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
123 /* Controls access to the 'threads' hash table */
124 static void mono_threads_lock (void);
125 static void mono_threads_unlock (void);
126 static MonoCoopMutex threads_mutex;
128 /* Controls access to the 'joinable_threads' hash table */
129 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
130 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
131 static mono_mutex_t joinable_threads_mutex;
133 /* Holds current status of static data heap */
134 static StaticDataInfo thread_static_info;
135 static StaticDataInfo context_static_info;
137 /* The hash of existing threads (key is thread ID, value is
138 * MonoInternalThread*) that need joining before exit
140 static MonoGHashTable *threads=NULL;
142 /* List of app context GC handles.
143 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
145 static GHashTable *contexts = NULL;
147 /* Cleanup queue for contexts. */
148 static MonoReferenceQueue *context_queue;
151 * Threads which are starting up and they are not in the 'threads' hash yet.
152 * When handle_store is called for a thread, it will be removed from this hash table.
153 * Protected by mono_threads_lock ().
155 static MonoGHashTable *threads_starting_up = NULL;
157 /* The TLS key that holds the MonoObject assigned to each thread */
158 static MonoNativeTlsKey current_object_key;
161 /* Protected by the threads lock */
162 static GHashTable *joinable_threads;
163 static int joinable_thread_count;
165 #ifdef MONO_HAVE_FAST_TLS
166 /* we need to use both the Tls* functions and __thread because
167 * the gc needs to see all the threads
169 MONO_FAST_TLS_DECLARE(tls_current_object);
170 #define SET_CURRENT_OBJECT(x) do { \
171 MONO_FAST_TLS_SET (tls_current_object, x); \
172 mono_native_tls_set_value (current_object_key, x); \
174 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
176 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
177 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
180 /* function called at thread start */
181 static MonoThreadStartCB mono_thread_start_cb = NULL;
183 /* function called at thread attach */
184 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
186 /* function called at thread cleanup */
187 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
189 /* The default stack size for each thread */
190 static guint32 default_stacksize = 0;
191 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
193 static void thread_adjust_static_data (MonoInternalThread *thread);
194 static void context_adjust_static_data (MonoAppContext *ctx);
195 static void mono_free_static_data (gpointer* static_data);
196 static void mono_init_static_data_info (StaticDataInfo *static_data);
197 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
198 static gboolean mono_thread_resume (MonoInternalThread* thread);
199 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
200 static void self_abort_internal (MonoError *error);
201 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
202 static void self_suspend_internal (void);
204 static MonoException* mono_thread_execute_interruption (void);
205 static void ref_stack_destroy (gpointer rs);
207 /* Spin lock for InterlockedXXX 64 bit functions */
208 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
209 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
210 static mono_mutex_t interlocked_mutex;
212 /* global count of thread interruptions requested */
213 static gint32 thread_interruption_requested = 0;
215 /* Event signaled when a thread changes its background mode */
216 static HANDLE background_change_event;
218 static gboolean shutting_down = FALSE;
220 static gint32 managed_thread_id_counter = 0;
222 /* Class lazy loading functions */
223 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
226 mono_threads_lock (void)
228 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
232 mono_threads_unlock (void)
234 mono_locks_coop_release (&threads_mutex, ThreadsLock);
239 get_next_managed_thread_id (void)
241 return InterlockedIncrement (&managed_thread_id_counter);
245 mono_thread_get_tls_key (void)
247 return current_object_key;
251 mono_thread_get_tls_offset (void)
256 if (current_object_key)
257 offset = current_object_key;
259 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
264 static inline MonoNativeThreadId
265 thread_get_tid (MonoInternalThread *thread)
267 /* We store the tid as a guint64 to keep the object layout constant between platforms */
268 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
271 /* handle_store() and handle_remove() manage the array of threads that
272 * still need to be waited for when the main thread exits.
274 * If handle_store() returns FALSE the thread must not be started
275 * because Mono is shutting down.
277 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
279 mono_threads_lock ();
281 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
283 if (threads_starting_up)
284 mono_g_hash_table_remove (threads_starting_up, thread);
286 if (shutting_down && !force_attach) {
287 mono_threads_unlock ();
292 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
293 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
296 /* We don't need to duplicate thread->handle, because it is
297 * only closed when the thread object is finalized by the GC.
299 g_assert (thread->internal_thread);
300 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
301 thread->internal_thread);
303 mono_threads_unlock ();
308 static gboolean handle_remove(MonoInternalThread *thread)
311 gsize tid = thread->tid;
313 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
315 mono_threads_lock ();
318 /* We have to check whether the thread object for the
319 * tid is still the same in the table because the
320 * thread might have been destroyed and the tid reused
321 * in the meantime, in which case the tid would be in
322 * the table, but with another thread object.
324 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
325 mono_g_hash_table_remove (threads, (gpointer)tid);
334 mono_threads_unlock ();
336 /* Don't close the handle here, wait for the object finalizer
337 * to do it. Otherwise, the following race condition applies:
339 * 1) Thread exits (and handle_remove() closes the handle)
341 * 2) Some other handle is reassigned the same slot
343 * 3) Another thread tries to join the first thread, and
344 * blocks waiting for the reassigned handle to be signalled
345 * (which might never happen). This is possible, because the
346 * thread calling Join() still has a reference to the first
352 static void ensure_synch_cs_set (MonoInternalThread *thread)
354 MonoCoopMutex *synch_cs;
356 if (thread->synch_cs != NULL) {
360 synch_cs = g_new0 (MonoCoopMutex, 1);
361 mono_coop_mutex_init_recursive (synch_cs);
363 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
364 synch_cs, NULL) != NULL) {
365 /* Another thread must have installed this CS */
366 mono_coop_mutex_destroy (synch_cs);
372 lock_thread (MonoInternalThread *thread)
374 if (!thread->synch_cs)
375 ensure_synch_cs_set (thread);
377 g_assert (thread->synch_cs);
379 mono_coop_mutex_lock (thread->synch_cs);
383 unlock_thread (MonoInternalThread *thread)
385 mono_coop_mutex_unlock (thread->synch_cs);
389 * NOTE: this function can be called also for threads different from the current one:
390 * make sure no code called from it will ever assume it is run on the thread that is
391 * getting cleaned up.
393 static void thread_cleanup (MonoInternalThread *thread)
395 g_assert (thread != NULL);
397 if (thread->abort_state_handle) {
398 mono_gchandle_free (thread->abort_state_handle);
399 thread->abort_state_handle = 0;
401 thread->abort_exc = NULL;
402 thread->current_appcontext = NULL;
405 * This is necessary because otherwise we might have
406 * cross-domain references which will not get cleaned up when
407 * the target domain is unloaded.
409 if (thread->cached_culture_info) {
411 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
412 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
416 * thread->synch_cs can be NULL if this was called after
417 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
418 * This can happen only during shutdown.
419 * The shutting_down flag is not always set, so we can't assert on it.
421 if (thread->synch_cs)
422 LOCK_THREAD (thread);
424 thread->state |= ThreadState_Stopped;
425 thread->state &= ~ThreadState_Background;
427 if (thread->synch_cs)
428 UNLOCK_THREAD (thread);
431 An interruption request has leaked to cleanup. Adjust the global counter.
433 This can happen is the abort source thread finds the abortee (this) thread
434 in unmanaged code. If this thread never trips back to managed code or check
435 the local flag it will be left set and positively unbalance the global counter.
437 Leaving the counter unbalanced will cause a performance degradation since all threads
438 will now keep checking their local flags all the time.
440 if (InterlockedExchange (&thread->interruption_requested, 0))
441 InterlockedDecrement (&thread_interruption_requested);
443 /* if the thread is not in the hash it has been removed already */
444 if (!handle_remove (thread)) {
445 if (thread == mono_thread_internal_current ()) {
446 mono_domain_unset ();
447 mono_memory_barrier ();
449 /* This needs to be called even if handle_remove () fails */
450 if (mono_thread_cleanup_fn)
451 mono_thread_cleanup_fn (thread_get_tid (thread));
454 mono_release_type_locks (thread);
456 /* Can happen when we attach the profiler helper thread in order to heapshot. */
457 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
458 mono_profiler_thread_end (thread->tid);
460 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
462 if (thread == mono_thread_internal_current ()) {
464 * This will signal async signal handlers that the thread has exited.
465 * The profiler callback needs this to be set, so it cannot be done earlier.
467 mono_domain_unset ();
468 mono_memory_barrier ();
471 if (thread == mono_thread_internal_current ())
472 mono_thread_pop_appdomain_ref ();
474 thread->cached_culture_info = NULL;
476 mono_free_static_data (thread->static_data);
477 thread->static_data = NULL;
478 ref_stack_destroy (thread->appdomain_refs);
479 thread->appdomain_refs = NULL;
481 if (mono_thread_cleanup_fn)
482 mono_thread_cleanup_fn (thread_get_tid (thread));
484 if (mono_gc_is_moving ()) {
485 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
486 thread->thread_pinning_ref = NULL;
492 * A special static data offset (guint32) consists of 3 parts:
494 * [0] 6-bit index into the array of chunks.
495 * [6] 25-bit offset into the array.
496 * [31] Bit indicating thread or context static.
501 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
512 } SpecialStaticOffset;
514 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
515 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
517 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
518 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
519 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
520 (((SpecialStaticOffset *) &(x))->fields.f)
523 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
525 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
527 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
528 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
530 return ((char *) thread->static_data [idx]) + off;
534 get_context_static_data (MonoAppContext *ctx, guint32 offset)
536 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
538 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
539 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
541 return ((char *) ctx->static_data [idx]) + off;
545 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
547 static MonoClassField *current_thread_field = NULL;
551 if (!current_thread_field) {
552 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
553 g_assert (current_thread_field);
556 mono_class_vtable (domain, mono_defaults.thread_class);
557 mono_domain_lock (domain);
558 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
559 mono_domain_unlock (domain);
562 return (MonoThread **)get_thread_static_data (thread, offset);
566 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
568 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
570 g_assert (current->obj.vtable->domain == domain);
572 g_assert (!*current_thread_ptr);
573 *current_thread_ptr = current;
577 create_thread_object (MonoDomain *domain)
580 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
581 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, &error);
582 /* only possible failure mode is OOM, from which we don't expect to recover. */
583 mono_error_assert_ok (&error);
588 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
592 thread = create_thread_object (domain);
594 MONO_OBJECT_SETREF (thread, internal_thread, internal);
599 static MonoInternalThread*
600 create_internal_thread (void)
603 MonoInternalThread *thread;
606 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
607 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
608 /* only possible failure mode is OOM, from which we don't exect to recover */
609 mono_error_assert_ok (&error);
611 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
612 mono_coop_mutex_init_recursive (thread->synch_cs);
614 thread->apartment_state = ThreadApartmentState_Unknown;
615 thread->managed_id = get_next_managed_thread_id ();
616 if (mono_gc_is_moving ()) {
617 thread->thread_pinning_ref = thread;
618 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
625 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
627 MonoDomain *domain = mono_get_root_domain ();
629 if (!candidate || candidate->obj.vtable->domain != domain) {
630 candidate = new_thread_with_internal (domain, thread);
632 set_current_thread_for_domain (domain, thread, candidate);
633 g_assert (!thread->root_domain_thread);
634 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
638 static guint32 WINAPI start_wrapper_internal(void *data)
641 MonoThreadInfo *info;
642 StartInfo *start_info = (StartInfo *)data;
643 guint32 (*start_func)(void *);
647 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
650 MonoInternalThread *internal = start_info->obj->internal_thread;
651 MonoObject *start_delegate = start_info->delegate;
652 MonoDomain *domain = start_info->obj->obj.vtable->domain;
654 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
656 /* We can be sure start_info->obj->tid and
657 * start_info->obj->handle have been set, because the thread
658 * was created suspended, and these values were set before the
662 info = mono_thread_info_current ();
664 internal->thread_info = info;
665 internal->small_id = info->small_id;
669 SET_CURRENT_OBJECT (internal);
671 /* Every thread references the appdomain which created it */
672 mono_thread_push_appdomain_ref (domain);
674 if (!mono_domain_set (domain, FALSE)) {
675 /* No point in raising an appdomain_unloaded exception here */
676 /* FIXME: Cleanup here */
677 mono_thread_pop_appdomain_ref ();
681 start_func = start_info->func;
682 start_arg = start_info->obj->start_obj;
684 start_arg = start_info->start_arg;
686 /* We have to do this here because mono_thread_new_init()
687 requires that root_domain_thread is set up. */
688 thread_adjust_static_data (internal);
689 init_root_domain_thread (internal, start_info->obj);
691 /* This MUST be called before any managed code can be
692 * executed, as it calls the callback function that (for the
693 * jit) sets the lmf marker.
695 mono_thread_new_init (tid, &tid, start_func);
696 internal->stack_ptr = &tid;
697 if (domain != mono_get_root_domain ())
698 set_current_thread_for_domain (domain, internal, start_info->obj);
700 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
702 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
704 /* On 2.0 profile (and higher), set explicitly since state might have been
706 if (internal->apartment_state == ThreadApartmentState_Unknown)
707 internal->apartment_state = ThreadApartmentState_MTA;
709 mono_thread_init_apartment_state ();
711 if(internal->start_notify!=NULL) {
712 /* Let the thread that called Start() know we're
715 ReleaseSemaphore (internal->start_notify, 1, NULL);
719 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
723 * Call this after calling start_notify, since the profiler callback might want
724 * to lock the thread, and the lock is held by thread_start () which waits for
727 mono_profiler_thread_start (tid);
729 /* if the name was set before starting, we didn't invoke the profiler callback */
730 if (internal->name) {
731 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
732 mono_profiler_thread_name (internal->tid, tname);
733 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
737 /* start_func is set only for unmanaged start functions */
739 start_func (start_arg);
742 g_assert (start_delegate != NULL);
743 args [0] = start_arg;
744 /* we may want to handle the exception here. See comment below on unhandled exceptions */
745 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
746 mono_error_raise_exception (&error); /* FIXME don't raise here */
749 /* If the thread calls ExitThread at all, this remaining code
750 * will not be executed, but the main thread will eventually
751 * call thread_cleanup() on this thread's behalf.
754 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
756 /* Do any cleanup needed for apartment state. This
757 * cannot be done in thread_cleanup since thread_cleanup could be
758 * called for a thread other than the current thread.
759 * mono_thread_cleanup_apartment_state cleans up apartment
760 * for the current thead */
761 mono_thread_cleanup_apartment_state ();
763 thread_cleanup (internal);
767 /* Remove the reference to the thread object in the TLS data,
768 * so the thread object can be finalized. This won't be
769 * reached if the thread threw an uncaught exception, so those
770 * thread handles will stay referenced :-( (This is due to
771 * missing support for scanning thread-specific data in the
772 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
775 SET_CURRENT_OBJECT (NULL);
780 static guint32 WINAPI start_wrapper(void *data)
784 /* Avoid scanning the frames above this frame during a GC */
785 mono_gc_set_stack_end ((void*)&dummy);
787 return start_wrapper_internal (data);
793 * Common thread creation code.
794 * LOCKING: Acquires the threads lock.
797 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
800 HANDLE thread_handle;
801 MonoNativeThreadId tid;
802 guint32 create_flags;
805 * Join joinable threads to prevent running out of threads since the finalizer
806 * thread might be blocked/backlogged.
808 mono_threads_join_threads ();
810 mono_error_init (error);
812 mono_threads_lock ();
815 mono_threads_unlock ();
818 if (threads_starting_up == NULL) {
819 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
820 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
822 mono_g_hash_table_insert (threads_starting_up, thread, thread);
823 mono_threads_unlock ();
825 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
826 if (!internal->start_notify) {
827 mono_threads_lock ();
828 mono_g_hash_table_remove (threads_starting_up, thread);
829 mono_threads_unlock ();
830 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
836 stack_size = default_stacksize_for_thread (internal);
838 /* Create suspended, so we can do some housekeeping before the thread
841 create_flags = CREATE_SUSPENDED;
843 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
844 stack_size, create_flags, &tid);
846 if (thread_handle == NULL) {
847 /* The thread couldn't be created, so set an exception */
848 mono_threads_lock ();
849 mono_g_hash_table_remove (threads_starting_up, thread);
850 mono_threads_unlock ();
852 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
855 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
857 internal->handle = thread_handle;
858 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
860 internal->threadpool_thread = threadpool_thread;
861 if (threadpool_thread)
862 mono_thread_set_state (internal, ThreadState_Background);
864 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
866 /* Only store the handle when the thread is about to be
867 * launched, to avoid the main thread deadlocking while trying
868 * to clean up a thread that will never be signalled.
870 if (!handle_store (thread, FALSE))
873 mono_thread_info_resume (tid);
875 if (internal->start_notify) {
877 * Wait for the thread to set up its TLS data etc, so
878 * theres no potential race condition if someone tries
879 * to look up the data believing the thread has
882 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));
885 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
888 CloseHandle (internal->start_notify);
889 internal->start_notify = NULL;
892 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));
897 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
899 if (mono_thread_start_cb) {
900 mono_thread_start_cb (tid, stack_start, func);
904 void mono_threads_set_default_stacksize (guint32 stacksize)
906 default_stacksize = stacksize;
909 guint32 mono_threads_get_default_stacksize (void)
911 return default_stacksize;
915 * mono_thread_create_internal:
917 * ARG should not be a GC reference.
920 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
923 MonoInternalThread *internal;
924 StartInfo *start_info;
927 mono_error_init (error);
929 thread = create_thread_object (domain);
931 internal = create_internal_thread ();
933 MONO_OBJECT_SETREF (thread, internal_thread, internal);
935 start_info = g_new0 (StartInfo, 1);
936 start_info->func = (guint32 (*)(void *))func;
937 start_info->obj = thread;
938 start_info->start_arg = arg;
940 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, error);
941 return_val_if_nok (error, NULL);
943 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
944 #ifndef MONO_CROSS_COMPILE
945 if (mono_check_corlib_version () == NULL)
946 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
953 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
956 if (!mono_thread_create_checked (domain, func, arg, &error))
957 mono_error_cleanup (&error);
961 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
963 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
967 mono_thread_attach (MonoDomain *domain)
969 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
975 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
977 MonoThreadInfo *info;
978 MonoInternalThread *thread;
979 MonoThread *current_thread;
980 HANDLE thread_handle;
981 MonoNativeThreadId tid;
983 if ((thread = mono_thread_internal_current ())) {
984 if (domain != mono_domain_get ())
985 mono_domain_set (domain, TRUE);
986 /* Already attached */
987 return mono_thread_current ();
990 if (!mono_gc_register_thread (&domain)) {
991 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 ());
994 thread = create_internal_thread ();
996 thread_handle = mono_thread_info_open_handle ();
997 g_assert (thread_handle);
999 tid=mono_native_thread_id_get ();
1001 thread->handle = thread_handle;
1002 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
1003 thread->stack_ptr = &tid;
1005 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1007 info = mono_thread_info_current ();
1009 thread->thread_info = info;
1010 thread->small_id = info->small_id;
1012 current_thread = new_thread_with_internal (domain, thread);
1014 if (!handle_store (current_thread, force_attach)) {
1015 /* Mono is shutting down, so just wait for the end */
1017 mono_thread_info_sleep (10000, NULL);
1020 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1022 SET_CURRENT_OBJECT (thread);
1023 mono_domain_set (domain, TRUE);
1025 thread_adjust_static_data (thread);
1027 init_root_domain_thread (thread, current_thread);
1029 if (domain != mono_get_root_domain ())
1030 set_current_thread_for_domain (domain, thread, current_thread);
1033 if (mono_thread_attach_cb) {
1037 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1040 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1042 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1045 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1046 if (!info->tools_thread)
1047 // FIXME: Need a separate callback
1048 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1050 return current_thread;
1054 mono_thread_detach_internal (MonoInternalThread *thread)
1056 g_return_if_fail (thread != NULL);
1058 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1060 thread_cleanup (thread);
1062 SET_CURRENT_OBJECT (NULL);
1063 mono_domain_unset ();
1065 /* Don't need to CloseHandle this thread, even though we took a
1066 * reference in mono_thread_attach (), because the GC will do it
1067 * when the Thread object is finalised.
1072 mono_thread_detach (MonoThread *thread)
1075 mono_thread_detach_internal (thread->internal_thread);
1079 * mono_thread_detach_if_exiting:
1081 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1082 * This should be used at the end of embedding code which calls into managed code, and which
1083 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1086 mono_thread_detach_if_exiting (void)
1088 if (mono_thread_info_is_exiting ()) {
1089 MonoInternalThread *thread;
1091 thread = mono_thread_internal_current ();
1093 mono_thread_detach_internal (thread);
1094 mono_thread_info_detach ();
1102 MonoInternalThread *thread = mono_thread_internal_current ();
1104 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1106 thread_cleanup (thread);
1107 SET_CURRENT_OBJECT (NULL);
1108 mono_domain_unset ();
1110 /* we could add a callback here for embedders to use. */
1111 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1112 exit (mono_environment_exitcode_get ());
1113 mono_thread_info_exit ();
1117 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1119 MonoInternalThread *internal;
1121 internal = create_internal_thread ();
1123 internal->state = ThreadState_Unstarted;
1125 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1129 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1133 StartInfo *start_info;
1134 MonoInternalThread *internal;
1137 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1139 if (!this_obj->internal_thread)
1140 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1141 internal = this_obj->internal_thread;
1143 LOCK_THREAD (internal);
1145 if ((internal->state & ThreadState_Unstarted) == 0) {
1146 UNLOCK_THREAD (internal);
1147 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1151 if ((internal->state & ThreadState_Aborted) != 0) {
1152 UNLOCK_THREAD (internal);
1155 /* This is freed in start_wrapper */
1156 start_info = g_new0 (StartInfo, 1);
1157 start_info->func = NULL;
1158 start_info->start_arg = NULL;
1159 start_info->delegate = start;
1160 start_info->obj = this_obj;
1161 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1163 res = create_thread (this_obj, internal, start_info, FALSE, 0, &error);
1165 mono_error_cleanup (&error);
1166 UNLOCK_THREAD (internal);
1170 internal->state &= ~ThreadState_Unstarted;
1172 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1174 UNLOCK_THREAD (internal);
1175 return internal->handle;
1179 * This is called from the finalizer of the internal thread object.
1182 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1184 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1187 * Since threads keep a reference to their thread object while running, by the time this function is called,
1188 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1189 * when thread_cleanup () can be called after this.
1192 CloseHandle (thread);
1194 if (this_obj->synch_cs) {
1195 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1196 this_obj->synch_cs = NULL;
1197 mono_coop_mutex_destroy (synch_cs);
1201 if (this_obj->name) {
1202 void *name = this_obj->name;
1203 this_obj->name = NULL;
1209 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1212 MonoInternalThread *thread = mono_thread_internal_current ();
1214 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1216 if (mono_thread_current_check_pending_interrupt ())
1220 gboolean alerted = FALSE;
1222 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1224 res = mono_thread_info_sleep (ms, &alerted);
1226 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1229 MonoException* exc = mono_thread_execute_interruption ();
1231 mono_raise_exception (exc);
1243 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1248 ves_icall_System_Threading_Thread_GetDomainID (void)
1250 return mono_domain_get()->domain_id;
1254 ves_icall_System_Threading_Thread_Yield (void)
1256 return mono_thread_info_yield ();
1260 * mono_thread_get_name:
1262 * Return the name of the thread. NAME_LEN is set to the length of the name.
1263 * Return NULL if the thread has no name. The returned memory is owned by the
1267 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1271 LOCK_THREAD (this_obj);
1273 if (!this_obj->name) {
1277 *name_len = this_obj->name_len;
1278 res = g_new (gunichar2, this_obj->name_len);
1279 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1282 UNLOCK_THREAD (this_obj);
1288 * mono_thread_get_name_utf8:
1290 * Return the name of the thread in UTF-8.
1291 * Return NULL if the thread has no name.
1292 * The returned memory is owned by the caller.
1295 mono_thread_get_name_utf8 (MonoThread *thread)
1300 MonoInternalThread *internal = thread->internal_thread;
1301 if (internal == NULL)
1304 LOCK_THREAD (internal);
1306 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1308 UNLOCK_THREAD (internal);
1314 * mono_thread_get_managed_id:
1316 * Return the Thread.ManagedThreadId value of `thread`.
1317 * Returns -1 if `thread` is NULL.
1320 mono_thread_get_managed_id (MonoThread *thread)
1325 MonoInternalThread *internal = thread->internal_thread;
1326 if (internal == NULL)
1329 int32_t id = internal->managed_id;
1335 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1340 mono_error_init (&error);
1342 LOCK_THREAD (this_obj);
1344 if (!this_obj->name)
1347 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1349 UNLOCK_THREAD (this_obj);
1351 if (mono_error_set_pending_exception (&error))
1358 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1360 LOCK_THREAD (this_obj);
1362 mono_error_init (error);
1364 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1365 UNLOCK_THREAD (this_obj);
1367 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1370 if (this_obj->name) {
1371 g_free (this_obj->name);
1372 this_obj->name_len = 0;
1375 this_obj->name = g_new (gunichar2, mono_string_length (name));
1376 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1377 this_obj->name_len = mono_string_length (name);
1380 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1383 this_obj->name = NULL;
1386 UNLOCK_THREAD (this_obj);
1388 if (this_obj->name && this_obj->tid) {
1389 char *tname = mono_string_to_utf8 (name);
1390 mono_profiler_thread_name (this_obj->tid, tname);
1391 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1397 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1400 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1401 mono_error_set_pending_exception (&error);
1405 * ves_icall_System_Threading_Thread_GetPriority_internal:
1406 * @param this_obj: The MonoInternalThread on which to operate.
1408 * Gets the priority of the given thread.
1409 * @return: The priority of the given thread.
1412 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1415 MonoInternalThread *internal = this_obj->internal_thread;
1417 LOCK_THREAD (internal);
1418 priority = GetThreadPriority (internal->handle) + 2;
1419 UNLOCK_THREAD (internal);
1424 * ves_icall_System_Threading_Thread_SetPriority_internal:
1425 * @param this_obj: The MonoInternalThread on which to operate.
1426 * @param priority: The priority to set.
1428 * Sets the priority of the given thread.
1431 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1433 MonoInternalThread *internal = this_obj->internal_thread;
1435 LOCK_THREAD (internal);
1436 SetThreadPriority (internal->handle, priority - 2);
1437 UNLOCK_THREAD (internal);
1440 /* If the array is already in the requested domain, we just return it,
1441 otherwise we return a copy in that domain. */
1443 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1447 mono_error_init (error);
1451 if (mono_object_domain (arr) == domain)
1454 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1455 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1460 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1463 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1464 mono_error_set_pending_exception (&error);
1469 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1472 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1473 mono_error_set_pending_exception (&error);
1478 mono_thread_current (void)
1480 MonoDomain *domain = mono_domain_get ();
1481 MonoInternalThread *internal = mono_thread_internal_current ();
1482 MonoThread **current_thread_ptr;
1484 g_assert (internal);
1485 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1487 if (!*current_thread_ptr) {
1488 g_assert (domain != mono_get_root_domain ());
1489 *current_thread_ptr = new_thread_with_internal (domain, internal);
1491 return *current_thread_ptr;
1494 /* Return the thread object belonging to INTERNAL in the current domain */
1496 mono_thread_current_for_thread (MonoInternalThread *internal)
1498 MonoDomain *domain = mono_domain_get ();
1499 MonoThread **current_thread_ptr;
1501 g_assert (internal);
1502 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1504 if (!*current_thread_ptr) {
1505 g_assert (domain != mono_get_root_domain ());
1506 *current_thread_ptr = new_thread_with_internal (domain, internal);
1508 return *current_thread_ptr;
1512 mono_thread_internal_current (void)
1514 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1515 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1520 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1522 MonoInternalThread *thread = this_obj->internal_thread;
1523 HANDLE handle = thread->handle;
1524 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1527 if (mono_thread_current_check_pending_interrupt ())
1530 LOCK_THREAD (thread);
1532 if ((thread->state & ThreadState_Unstarted) != 0) {
1533 UNLOCK_THREAD (thread);
1535 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1539 UNLOCK_THREAD (thread);
1544 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1546 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1549 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1552 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1554 if(ret==WAIT_OBJECT_0) {
1555 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1560 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1565 #define MANAGED_WAIT_FAILED 0x7fffffff
1568 map_native_wait_result_to_managed (gint32 val)
1570 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1571 return val == WAIT_FAILED ? MANAGED_WAIT_FAILED : val;
1575 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1583 mono_error_init (error);
1585 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1588 if (numhandles != 1)
1589 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE);
1591 ret = WaitForSingleObjectEx (handles [0], ms, TRUE);
1594 if (ret != WAIT_IO_COMPLETION)
1597 exc = mono_thread_execute_interruption ();
1599 mono_error_set_exception_instance (error, exc);
1606 /* Re-calculate ms according to the time passed */
1607 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1608 if (diff_ms >= ms) {
1612 wait = ms - diff_ms;
1618 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1625 MonoObject *waitHandle;
1626 MonoInternalThread *thread = mono_thread_internal_current ();
1628 /* Do this WaitSleepJoin check before creating objects */
1629 if (mono_thread_current_check_pending_interrupt ())
1630 return map_native_wait_result_to_managed (WAIT_FAILED);
1632 /* We fail in managed if the array has more than 64 elements */
1633 numhandles = (guint32)mono_array_length(mono_handles);
1634 handles = g_new0(HANDLE, numhandles);
1636 for(i = 0; i < numhandles; i++) {
1637 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1638 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1645 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1647 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1649 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1653 mono_error_set_pending_exception (&error);
1655 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1656 return map_native_wait_result_to_managed (ret);
1659 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1662 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1663 uintptr_t numhandles;
1666 MonoObject *waitHandle;
1667 MonoInternalThread *thread = mono_thread_internal_current ();
1669 /* Do this WaitSleepJoin check before creating objects */
1670 if (mono_thread_current_check_pending_interrupt ())
1671 return map_native_wait_result_to_managed (WAIT_FAILED);
1673 numhandles = mono_array_length(mono_handles);
1674 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1675 return map_native_wait_result_to_managed (WAIT_FAILED);
1677 for(i = 0; i < numhandles; i++) {
1678 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1679 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1686 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1688 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1690 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1692 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1694 mono_error_set_pending_exception (&error);
1696 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1698 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1699 return map_native_wait_result_to_managed (ret - WAIT_OBJECT_0);
1701 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1702 return map_native_wait_result_to_managed (ret - WAIT_ABANDONED_0);
1705 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1706 return map_native_wait_result_to_managed (ret);
1710 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1714 MonoInternalThread *thread = mono_thread_internal_current ();
1716 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1722 if (mono_thread_current_check_pending_interrupt ())
1723 return map_native_wait_result_to_managed (WAIT_FAILED);
1725 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1727 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1729 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1731 mono_error_set_pending_exception (&error);
1732 return map_native_wait_result_to_managed (ret);
1736 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1739 MonoInternalThread *thread = mono_thread_internal_current ();
1744 if (mono_thread_current_check_pending_interrupt ())
1745 return map_native_wait_result_to_managed (WAIT_FAILED);
1747 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1750 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1753 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1755 return map_native_wait_result_to_managed (ret);
1758 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1765 mutex = CreateMutex (NULL, owned, NULL);
1767 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1769 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1777 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1778 return(ReleaseMutex (handle));
1781 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1787 *error = ERROR_SUCCESS;
1789 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1791 *error = GetLastError ();
1798 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1805 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1807 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1808 mono_string_chars (name));
1810 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1818 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1822 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1827 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1831 *error = ERROR_SUCCESS;
1833 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1835 *error = GetLastError ();
1841 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1848 event = CreateEvent (NULL, manual, initial, NULL);
1850 event = CreateEvent (NULL, manual, initial,
1851 mono_string_chars (name));
1853 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1861 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1862 return (SetEvent(handle));
1865 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1866 return (ResetEvent(handle));
1870 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1871 CloseHandle (handle);
1874 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1880 *error = ERROR_SUCCESS;
1882 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1884 *error = GetLastError ();
1890 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1892 return InterlockedIncrement (location);
1895 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1897 #if SIZEOF_VOID_P == 4
1898 if (G_UNLIKELY ((size_t)location & 0x7)) {
1900 mono_interlocked_lock ();
1903 mono_interlocked_unlock ();
1907 return InterlockedIncrement64 (location);
1910 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1912 return InterlockedDecrement(location);
1915 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1917 #if SIZEOF_VOID_P == 4
1918 if (G_UNLIKELY ((size_t)location & 0x7)) {
1920 mono_interlocked_lock ();
1923 mono_interlocked_unlock ();
1927 return InterlockedDecrement64 (location);
1930 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1932 return InterlockedExchange(location, value);
1935 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1938 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1939 mono_gc_wbarrier_generic_nostore (location);
1943 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1945 return InterlockedExchangePointer(location, value);
1948 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1950 IntFloatUnion val, ret;
1953 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1959 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1961 #if SIZEOF_VOID_P == 4
1962 if (G_UNLIKELY ((size_t)location & 0x7)) {
1964 mono_interlocked_lock ();
1967 mono_interlocked_unlock ();
1971 return InterlockedExchange64 (location, value);
1975 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1977 LongDoubleUnion val, ret;
1980 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1985 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1987 return InterlockedCompareExchange(location, value, comparand);
1990 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1992 gint32 r = InterlockedCompareExchange(location, value, comparand);
1993 *success = r == comparand;
1997 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2000 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2001 mono_gc_wbarrier_generic_nostore (location);
2005 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2007 return InterlockedCompareExchangePointer(location, value, comparand);
2010 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2012 IntFloatUnion val, ret, cmp;
2015 cmp.fval = comparand;
2016 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2022 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2024 #if SIZEOF_VOID_P == 8
2025 LongDoubleUnion val, comp, ret;
2028 comp.fval = comparand;
2029 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2035 mono_interlocked_lock ();
2037 if (old == comparand)
2039 mono_interlocked_unlock ();
2046 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2048 #if SIZEOF_VOID_P == 4
2049 if (G_UNLIKELY ((size_t)location & 0x7)) {
2051 mono_interlocked_lock ();
2053 if (old == comparand)
2055 mono_interlocked_unlock ();
2059 return InterlockedCompareExchange64 (location, value, comparand);
2063 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2066 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2067 mono_gc_wbarrier_generic_nostore (location);
2072 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2075 MONO_CHECK_NULL (location, NULL);
2076 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2077 mono_gc_wbarrier_generic_nostore (location);
2082 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2084 return InterlockedAdd (location, value);
2088 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2090 #if SIZEOF_VOID_P == 4
2091 if (G_UNLIKELY ((size_t)location & 0x7)) {
2093 mono_interlocked_lock ();
2096 mono_interlocked_unlock ();
2100 return InterlockedAdd64 (location, value);
2104 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2106 #if SIZEOF_VOID_P == 4
2107 if (G_UNLIKELY ((size_t)location & 0x7)) {
2109 mono_interlocked_lock ();
2111 mono_interlocked_unlock ();
2115 return InterlockedRead64 (location);
2119 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2121 mono_memory_barrier ();
2125 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2127 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2129 if (state & ThreadState_Background) {
2130 /* If the thread changes the background mode, the main thread has to
2131 * be notified, since it has to rebuild the list of threads to
2134 SetEvent (background_change_event);
2139 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2141 mono_thread_set_state (this_obj, (MonoThreadState)state);
2143 if (state & ThreadState_Background) {
2144 /* If the thread changes the background mode, the main thread has to
2145 * be notified, since it has to rebuild the list of threads to
2148 SetEvent (background_change_event);
2153 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2157 LOCK_THREAD (this_obj);
2159 state = this_obj->state;
2161 UNLOCK_THREAD (this_obj);
2166 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2168 MonoInternalThread *current;
2170 MonoInternalThread *thread = this_obj->internal_thread;
2172 LOCK_THREAD (thread);
2174 current = mono_thread_internal_current ();
2176 thread->thread_interrupt_requested = TRUE;
2177 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2179 UNLOCK_THREAD (thread);
2182 async_abort_internal (thread, FALSE);
2187 * mono_thread_current_check_pending_interrupt:
2189 * Checks if there's a interruption request and set the pending exception if so.
2191 * @returns true if a pending exception was set
2194 mono_thread_current_check_pending_interrupt (void)
2196 MonoInternalThread *thread = mono_thread_internal_current ();
2197 gboolean throw_ = FALSE;
2199 LOCK_THREAD (thread);
2201 if (thread->thread_interrupt_requested) {
2203 thread->thread_interrupt_requested = FALSE;
2206 UNLOCK_THREAD (thread);
2209 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2214 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2216 LOCK_THREAD (thread);
2218 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2219 (thread->state & ThreadState_StopRequested) != 0 ||
2220 (thread->state & ThreadState_Stopped) != 0)
2222 UNLOCK_THREAD (thread);
2226 if ((thread->state & ThreadState_Unstarted) != 0) {
2227 thread->state |= ThreadState_Aborted;
2228 UNLOCK_THREAD (thread);
2232 thread->state |= ThreadState_AbortRequested;
2233 if (thread->abort_state_handle)
2234 mono_gchandle_free (thread->abort_state_handle);
2236 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2237 g_assert (thread->abort_state_handle);
2239 thread->abort_state_handle = 0;
2241 thread->abort_exc = NULL;
2243 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));
2245 /* During shutdown, we can't wait for other threads */
2247 /* Make sure the thread is awake */
2248 mono_thread_resume (thread);
2250 UNLOCK_THREAD (thread);
2255 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2257 if (!request_thread_abort (thread, state))
2260 if (thread == mono_thread_internal_current ()) {
2262 self_abort_internal (&error);
2263 mono_error_set_pending_exception (&error);
2265 async_abort_internal (thread, TRUE);
2270 * mono_thread_internal_abort:
2272 * Request thread @thread to be aborted.
2274 * @thread MUST NOT be the current thread.
2277 mono_thread_internal_abort (MonoInternalThread *thread)
2279 g_assert (thread != mono_thread_internal_current ());
2281 if (!request_thread_abort (thread, NULL))
2283 async_abort_internal (thread, TRUE);
2287 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2289 MonoInternalThread *thread = mono_thread_internal_current ();
2290 gboolean was_aborting;
2292 LOCK_THREAD (thread);
2293 was_aborting = thread->state & ThreadState_AbortRequested;
2294 thread->state &= ~ThreadState_AbortRequested;
2295 UNLOCK_THREAD (thread);
2297 if (!was_aborting) {
2298 const char *msg = "Unable to reset abort because no abort was requested";
2299 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2302 thread->abort_exc = NULL;
2303 if (thread->abort_state_handle) {
2304 mono_gchandle_free (thread->abort_state_handle);
2305 /* This is actually not necessary - the handle
2306 only counts if the exception is set */
2307 thread->abort_state_handle = 0;
2312 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2314 LOCK_THREAD (thread);
2316 thread->state &= ~ThreadState_AbortRequested;
2318 if (thread->abort_exc) {
2319 thread->abort_exc = NULL;
2320 if (thread->abort_state_handle) {
2321 mono_gchandle_free (thread->abort_state_handle);
2322 /* This is actually not necessary - the handle
2323 only counts if the exception is set */
2324 thread->abort_state_handle = 0;
2328 UNLOCK_THREAD (thread);
2332 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2335 MonoInternalThread *thread = this_obj->internal_thread;
2336 MonoObject *state, *deserialized = NULL;
2339 if (!thread->abort_state_handle)
2342 state = mono_gchandle_get_target (thread->abort_state_handle);
2345 domain = mono_domain_get ();
2346 if (mono_object_domain (state) == domain)
2349 deserialized = mono_object_xdomain_representation (state, domain, &error);
2351 if (!deserialized) {
2352 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2353 if (!is_ok (&error)) {
2354 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2355 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2357 mono_set_pending_exception (invalid_op_exc);
2361 return deserialized;
2365 mono_thread_suspend (MonoInternalThread *thread)
2367 LOCK_THREAD (thread);
2369 if ((thread->state & ThreadState_Unstarted) != 0 ||
2370 (thread->state & ThreadState_Aborted) != 0 ||
2371 (thread->state & ThreadState_Stopped) != 0)
2373 UNLOCK_THREAD (thread);
2377 if ((thread->state & ThreadState_Suspended) != 0 ||
2378 (thread->state & ThreadState_SuspendRequested) != 0 ||
2379 (thread->state & ThreadState_StopRequested) != 0)
2381 UNLOCK_THREAD (thread);
2385 thread->state |= ThreadState_SuspendRequested;
2387 if (thread == mono_thread_internal_current ()) {
2388 /* calls UNLOCK_THREAD (thread) */
2389 self_suspend_internal ();
2391 /* calls UNLOCK_THREAD (thread) */
2392 async_suspend_internal (thread, FALSE);
2399 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2401 if (!mono_thread_suspend (this_obj->internal_thread)) {
2402 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2407 /* LOCKING: LOCK_THREAD(thread) must be held */
2409 mono_thread_resume (MonoInternalThread *thread)
2411 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2412 thread->state &= ~ThreadState_SuspendRequested;
2416 if ((thread->state & ThreadState_Suspended) == 0 ||
2417 (thread->state & ThreadState_Unstarted) != 0 ||
2418 (thread->state & ThreadState_Aborted) != 0 ||
2419 (thread->state & ThreadState_Stopped) != 0)
2424 UNLOCK_THREAD (thread);
2426 /* Awake the thread */
2427 if (!mono_thread_info_resume (thread_get_tid (thread)))
2430 LOCK_THREAD (thread);
2432 thread->state &= ~ThreadState_Suspended;
2438 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2440 if (!thread->internal_thread) {
2441 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2443 LOCK_THREAD (thread->internal_thread);
2444 if (!mono_thread_resume (thread->internal_thread))
2445 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2446 UNLOCK_THREAD (thread->internal_thread);
2451 mono_threads_is_critical_method (MonoMethod *method)
2453 switch (method->wrapper_type) {
2454 case MONO_WRAPPER_RUNTIME_INVOKE:
2455 case MONO_WRAPPER_XDOMAIN_INVOKE:
2456 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2463 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2468 if (mono_threads_is_critical_method (m)) {
2469 *((gboolean*)data) = TRUE;
2476 is_running_protected_wrapper (void)
2478 gboolean found = FALSE;
2479 mono_stack_walk (find_wrapper, &found);
2484 request_thread_stop (MonoInternalThread *thread)
2486 LOCK_THREAD (thread);
2488 if ((thread->state & ThreadState_StopRequested) != 0 ||
2489 (thread->state & ThreadState_Stopped) != 0)
2491 UNLOCK_THREAD (thread);
2495 /* Make sure the thread is awake */
2496 mono_thread_resume (thread);
2498 thread->state |= ThreadState_StopRequested;
2499 thread->state &= ~ThreadState_AbortRequested;
2501 UNLOCK_THREAD (thread);
2506 * mono_thread_internal_stop:
2508 * Request thread @thread to stop.
2510 * @thread MUST NOT be the current thread.
2513 mono_thread_internal_stop (MonoInternalThread *thread)
2515 g_assert (thread != mono_thread_internal_current ());
2517 if (!request_thread_stop (thread))
2520 async_abort_internal (thread, TRUE);
2523 void mono_thread_stop (MonoThread *thread)
2525 MonoInternalThread *internal = thread->internal_thread;
2527 if (!request_thread_stop (internal))
2530 if (internal == mono_thread_internal_current ()) {
2532 self_abort_internal (&error);
2534 This function is part of the embeding API and has no way to return the exception
2535 to be thrown. So what we do is keep the old behavior and raise the exception.
2537 mono_error_raise_exception (&error);
2539 async_abort_internal (internal, TRUE);
2544 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2546 gint8 tmp = *(volatile gint8 *)ptr;
2547 mono_memory_barrier ();
2552 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2554 gint16 tmp = *(volatile gint16 *)ptr;
2555 mono_memory_barrier ();
2560 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2562 gint32 tmp = *(volatile gint32 *)ptr;
2563 mono_memory_barrier ();
2568 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2570 gint64 tmp = *(volatile gint64 *)ptr;
2571 mono_memory_barrier ();
2576 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2578 volatile void *tmp = *(volatile void **)ptr;
2579 mono_memory_barrier ();
2580 return (void *) tmp;
2584 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2586 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2587 mono_memory_barrier ();
2588 return (MonoObject *) tmp;
2592 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2594 double tmp = *(volatile double *)ptr;
2595 mono_memory_barrier ();
2600 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2602 float tmp = *(volatile float *)ptr;
2603 mono_memory_barrier ();
2608 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2610 return InterlockedRead8 ((volatile gint8 *)ptr);
2614 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2616 return InterlockedRead16 ((volatile gint16 *)ptr);
2620 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2622 return InterlockedRead ((volatile gint32 *)ptr);
2626 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2628 #if SIZEOF_VOID_P == 4
2629 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2631 mono_interlocked_lock ();
2632 val = *(gint64*)ptr;
2633 mono_interlocked_unlock ();
2637 return InterlockedRead64 ((volatile gint64 *)ptr);
2641 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2643 return InterlockedReadPointer ((volatile gpointer *)ptr);
2647 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2651 #if SIZEOF_VOID_P == 4
2652 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2654 mono_interlocked_lock ();
2655 val = *(double*)ptr;
2656 mono_interlocked_unlock ();
2661 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2667 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2671 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2677 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2679 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2683 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2685 mono_memory_barrier ();
2686 *(volatile gint8 *)ptr = value;
2690 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2692 mono_memory_barrier ();
2693 *(volatile gint16 *)ptr = value;
2697 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2699 mono_memory_barrier ();
2700 *(volatile gint32 *)ptr = value;
2704 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2706 mono_memory_barrier ();
2707 *(volatile gint64 *)ptr = value;
2711 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2713 mono_memory_barrier ();
2714 *(volatile void **)ptr = value;
2718 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2720 mono_memory_barrier ();
2721 mono_gc_wbarrier_generic_store (ptr, value);
2725 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2727 mono_memory_barrier ();
2728 *(volatile double *)ptr = value;
2732 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2734 mono_memory_barrier ();
2735 *(volatile float *)ptr = value;
2739 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2741 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2745 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2747 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2751 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2753 InterlockedWrite ((volatile gint32 *)ptr, value);
2757 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2759 #if SIZEOF_VOID_P == 4
2760 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2761 mono_interlocked_lock ();
2762 *(gint64*)ptr = value;
2763 mono_interlocked_unlock ();
2768 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2772 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2774 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2778 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2782 #if SIZEOF_VOID_P == 4
2783 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2784 mono_interlocked_lock ();
2785 *(double*)ptr = value;
2786 mono_interlocked_unlock ();
2793 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2797 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2803 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2807 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2809 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2813 free_context (void *user_data)
2815 ContextStaticData *data = user_data;
2817 mono_threads_lock ();
2820 * There is no guarantee that, by the point this reference queue callback
2821 * has been invoked, the GC handle associated with the object will fail to
2822 * resolve as one might expect. So if we don't free and remove the GC
2823 * handle here, free_context_static_data_helper () could end up resolving
2824 * a GC handle to an actually-dead context which would contain a pointer
2825 * to an already-freed static data segment, resulting in a crash when
2828 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2830 mono_threads_unlock ();
2832 mono_gchandle_free (data->gc_handle);
2833 mono_free_static_data (data->static_data);
2838 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2840 mono_threads_lock ();
2842 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2845 contexts = g_hash_table_new (NULL, NULL);
2848 context_queue = mono_gc_reference_queue_new (free_context);
2850 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2851 g_hash_table_insert (contexts, gch, gch);
2854 * We use this intermediate structure to contain a duplicate pointer to
2855 * the static data because we can't rely on being able to resolve the GC
2856 * handle in the reference queue callback.
2858 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2859 data->gc_handle = GPOINTER_TO_UINT (gch);
2862 context_adjust_static_data (ctx);
2863 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2865 mono_threads_unlock ();
2867 mono_profiler_context_loaded (ctx);
2871 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2874 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2875 * cleanup in exceptional circumstances, we don't actually do any
2876 * cleanup work here. We instead do this via a reference queue.
2879 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2881 mono_profiler_context_unloaded (ctx);
2885 mono_thread_init_tls (void)
2887 MONO_FAST_TLS_INIT (tls_current_object);
2888 mono_native_tls_alloc (¤t_object_key, NULL);
2891 void mono_thread_init (MonoThreadStartCB start_cb,
2892 MonoThreadAttachCB attach_cb)
2894 mono_coop_mutex_init_recursive (&threads_mutex);
2896 mono_os_mutex_init_recursive(&interlocked_mutex);
2897 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2899 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2900 g_assert(background_change_event != NULL);
2902 mono_init_static_data_info (&thread_static_info);
2903 mono_init_static_data_info (&context_static_info);
2905 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2907 mono_thread_start_cb = start_cb;
2908 mono_thread_attach_cb = attach_cb;
2910 /* Get a pseudo handle to the current process. This is just a
2911 * kludge so that wapi can build a process handle if needed.
2912 * As a pseudo handle is returned, we don't need to clean
2915 GetCurrentProcess ();
2918 void mono_thread_cleanup (void)
2920 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2921 MonoThreadInfo *info;
2923 /* The main thread must abandon any held mutexes (particularly
2924 * important for named mutexes as they are shared across
2925 * processes, see bug 74680.) This will happen when the
2926 * thread exits, but if it's not running in a subthread it
2927 * won't exit in time.
2929 info = mono_thread_info_current ();
2930 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2934 /* This stuff needs more testing, it seems one of these
2935 * critical sections can be locked when mono_thread_cleanup is
2938 mono_coop_mutex_destroy (&threads_mutex);
2939 mono_os_mutex_destroy (&interlocked_mutex);
2940 mono_os_mutex_destroy (&delayed_free_table_mutex);
2941 mono_os_mutex_destroy (&small_id_mutex);
2942 CloseHandle (background_change_event);
2945 mono_native_tls_free (current_object_key);
2949 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2951 mono_thread_cleanup_fn = func;
2955 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2957 thread->internal_thread->manage_callback = func;
2961 static void print_tids (gpointer key, gpointer value, gpointer user)
2963 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2964 * sizeof(uint) and a cast to uint would overflow
2966 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2967 * print this as a pointer.
2969 g_message ("Waiting for: %p", key);
2974 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2975 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2979 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2983 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2986 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2989 if(ret==WAIT_FAILED) {
2990 /* See the comment in build_wait_tids() */
2991 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2995 for(i=0; i<wait->num; i++)
2996 CloseHandle (wait->handles[i]);
2998 if (ret == WAIT_TIMEOUT)
3001 for(i=0; i<wait->num; i++) {
3002 gsize tid = wait->threads[i]->tid;
3005 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
3006 * it can still run io-layer etc. code. So wait for it to really exit.
3007 * FIXME: This won't join threads which are not in the joinable_hash yet.
3009 mono_thread_join ((gpointer)tid);
3011 mono_threads_lock ();
3012 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3013 /* This thread must have been killed, because
3014 * it hasn't cleaned itself up. (It's just
3015 * possible that the thread exited before the
3016 * parent thread had a chance to store the
3017 * handle, and now there is another pointer to
3018 * the already-exited thread stored. In this
3019 * case, we'll just get two
3020 * mono_profiler_thread_end() calls for the
3024 mono_threads_unlock ();
3025 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
3026 thread_cleanup (wait->threads[i]);
3028 mono_threads_unlock ();
3033 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
3035 guint32 i, ret, count;
3037 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3039 /* Add the thread state change event, so it wakes up if a thread changes
3040 * to background mode.
3043 if (count < MAXIMUM_WAIT_OBJECTS) {
3044 wait->handles [count] = background_change_event;
3049 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
3052 if(ret==WAIT_FAILED) {
3053 /* See the comment in build_wait_tids() */
3054 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3058 for(i=0; i<wait->num; i++)
3059 CloseHandle (wait->handles[i]);
3061 if (ret == WAIT_TIMEOUT)
3064 if (ret < wait->num) {
3065 gsize tid = wait->threads[ret]->tid;
3066 mono_threads_lock ();
3067 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3068 /* See comment in wait_for_tids about thread cleanup */
3069 mono_threads_unlock ();
3070 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
3071 thread_cleanup (wait->threads [ret]);
3073 mono_threads_unlock ();
3077 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3079 struct wait_data *wait=(struct wait_data *)user;
3081 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
3083 MonoInternalThread *thread=(MonoInternalThread *)value;
3085 /* Ignore background threads, we abort them later */
3086 /* Do not lock here since it is not needed and the caller holds threads_lock */
3087 if (thread->state & ThreadState_Background) {
3088 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3089 return; /* just leave, ignore */
3092 if (mono_gc_is_finalizer_internal_thread (thread)) {
3093 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3097 if (thread == mono_thread_internal_current ()) {
3098 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3102 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3103 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3107 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3108 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3112 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3113 if (handle == NULL) {
3114 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3118 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3119 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3120 wait->handles[wait->num]=handle;
3121 wait->threads[wait->num]=thread;
3124 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3126 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3131 /* Just ignore the rest, we can't do anything with
3138 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3140 struct wait_data *wait=(struct wait_data *)user;
3141 MonoNativeThreadId self = mono_native_thread_id_get ();
3142 MonoInternalThread *thread = (MonoInternalThread *)value;
3145 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3148 /* The finalizer thread is not a background thread */
3149 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3150 && (thread->state & ThreadState_Background) != 0
3151 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3153 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3157 wait->handles[wait->num] = handle;
3158 wait->threads[wait->num] = thread;
3161 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3162 mono_thread_internal_stop (thread);
3166 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3167 && !mono_gc_is_finalizer_internal_thread (thread);
3171 * mono_threads_set_shutting_down:
3173 * Is called by a thread that wants to shut down Mono. If the runtime is already
3174 * shutting down, the calling thread is suspended/stopped, and this function never
3178 mono_threads_set_shutting_down (void)
3180 MonoInternalThread *current_thread = mono_thread_internal_current ();
3182 mono_threads_lock ();
3184 if (shutting_down) {
3185 mono_threads_unlock ();
3187 /* Make sure we're properly suspended/stopped */
3189 LOCK_THREAD (current_thread);
3191 if ((current_thread->state & ThreadState_SuspendRequested) ||
3192 (current_thread->state & ThreadState_AbortRequested) ||
3193 (current_thread->state & ThreadState_StopRequested)) {
3194 UNLOCK_THREAD (current_thread);
3195 mono_thread_execute_interruption ();
3197 current_thread->state |= ThreadState_Stopped;
3198 UNLOCK_THREAD (current_thread);
3201 /*since we're killing the thread, unset the current domain.*/
3202 mono_domain_unset ();
3204 /* Wake up other threads potentially waiting for us */
3205 mono_thread_info_exit ();
3207 shutting_down = TRUE;
3209 /* Not really a background state change, but this will
3210 * interrupt the main thread if it is waiting for all
3211 * the other threads.
3213 SetEvent (background_change_event);
3215 mono_threads_unlock ();
3219 void mono_thread_manage (void)
3221 struct wait_data wait_data;
3222 struct wait_data *wait = &wait_data;
3224 memset (wait, 0, sizeof (struct wait_data));
3225 /* join each thread that's still running */
3226 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3228 mono_threads_lock ();
3230 THREAD_DEBUG (g_message("%s: No threads", __func__));
3231 mono_threads_unlock ();
3234 mono_threads_unlock ();
3237 mono_threads_lock ();
3238 if (shutting_down) {
3239 /* somebody else is shutting down */
3240 mono_threads_unlock ();
3243 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3244 mono_g_hash_table_foreach (threads, print_tids, NULL));
3246 ResetEvent (background_change_event);
3248 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3249 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3250 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3251 mono_threads_unlock ();
3253 /* Something to wait for */
3254 wait_for_tids_or_state_change (wait, INFINITE);
3256 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3257 } while(wait->num>0);
3259 /* Mono is shutting down, so just wait for the end */
3260 if (!mono_runtime_try_shutdown ()) {
3261 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3262 mono_thread_suspend (mono_thread_internal_current ());
3263 mono_thread_execute_interruption ();
3267 * Remove everything but the finalizer thread and self.
3268 * Also abort all the background threads
3271 mono_threads_lock ();
3274 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3275 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3276 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3278 mono_threads_unlock ();
3280 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3282 /* Something to wait for */
3283 wait_for_tids (wait, INFINITE);
3285 } while (wait->num > 0);
3288 * give the subthreads a chance to really quit (this is mainly needed
3289 * to get correct user and system times from getrusage/wait/time(1)).
3290 * This could be removed if we avoid pthread_detach() and use pthread_join().
3292 mono_thread_info_yield ();
3296 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3298 MonoInternalThread *thread = (MonoInternalThread*)value;
3299 struct wait_data *wait = (struct wait_data*)user_data;
3303 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3305 * This needs no locking.
3307 if ((thread->state & ThreadState_Suspended) != 0 ||
3308 (thread->state & ThreadState_Stopped) != 0)
3311 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3312 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3316 wait->handles [wait->num] = handle;
3317 wait->threads [wait->num] = thread;
3323 * mono_thread_suspend_all_other_threads:
3325 * Suspend all managed threads except the finalizer thread and this thread. It is
3326 * not possible to resume them later.
3328 void mono_thread_suspend_all_other_threads (void)
3330 struct wait_data wait_data;
3331 struct wait_data *wait = &wait_data;
3333 MonoNativeThreadId self = mono_native_thread_id_get ();
3334 guint32 eventidx = 0;
3335 gboolean starting, finished;
3337 memset (wait, 0, sizeof (struct wait_data));
3339 * The other threads could be in an arbitrary state at this point, i.e.
3340 * they could be starting up, shutting down etc. This means that there could be
3341 * threads which are not even in the threads hash table yet.
3345 * First we set a barrier which will be checked by all threads before they
3346 * are added to the threads hash table, and they will exit if the flag is set.
3347 * This ensures that no threads could be added to the hash later.
3348 * We will use shutting_down as the barrier for now.
3350 g_assert (shutting_down);
3353 * We make multiple calls to WaitForMultipleObjects since:
3354 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3355 * - some threads could exit without becoming suspended
3360 * Make a copy of the hashtable since we can't do anything with
3361 * threads while threads_mutex is held.
3364 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3365 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3366 mono_threads_lock ();
3367 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3368 mono_threads_unlock ();
3371 /* Get the suspended events that we'll be waiting for */
3372 for (i = 0; i < wait->num; ++i) {
3373 MonoInternalThread *thread = wait->threads [i];
3375 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3376 || mono_gc_is_finalizer_internal_thread (thread)
3377 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3379 //CloseHandle (wait->handles [i]);
3380 wait->threads [i] = NULL; /* ignore this thread in next loop */
3384 LOCK_THREAD (thread);
3386 if ((thread->state & ThreadState_Suspended) != 0 ||
3387 (thread->state & ThreadState_StopRequested) != 0 ||
3388 (thread->state & ThreadState_Stopped) != 0) {
3389 UNLOCK_THREAD (thread);
3390 CloseHandle (wait->handles [i]);
3391 wait->threads [i] = NULL; /* ignore this thread in next loop */
3397 /* Convert abort requests into suspend requests */
3398 if ((thread->state & ThreadState_AbortRequested) != 0)
3399 thread->state &= ~ThreadState_AbortRequested;
3401 thread->state |= ThreadState_SuspendRequested;
3403 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3404 async_suspend_internal (thread, TRUE);
3406 if (eventidx <= 0) {
3408 * If there are threads which are starting up, we wait until they
3409 * are suspended when they try to register in the threads hash.
3410 * This is guaranteed to finish, since the threads which can create new
3411 * threads get suspended after a while.
3412 * FIXME: The finalizer thread can still create new threads.
3414 mono_threads_lock ();
3415 if (threads_starting_up)
3416 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3419 mono_threads_unlock ();
3421 mono_thread_info_sleep (100, NULL);
3429 MonoInternalThread *thread;
3430 MonoStackFrameInfo *frames;
3431 int nframes, max_frames;
3432 int nthreads, max_threads;
3433 MonoInternalThread **threads;
3434 } ThreadDumpUserData;
3436 static gboolean thread_dump_requested;
3438 /* This needs to be async safe */
3440 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3442 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3444 if (ud->nframes < ud->max_frames) {
3445 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3452 /* This needs to be async safe */
3453 static SuspendThreadResult
3454 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3456 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3457 MonoInternalThread *thread = user_data->thread;
3460 /* This no longer works with remote unwinding */
3462 wapi_desc = wapi_current_thread_desc ();
3463 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3468 if (thread == mono_thread_internal_current ())
3469 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3471 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3473 return MonoResumeThread;
3477 int nthreads, max_threads;
3478 MonoInternalThread **threads;
3479 } CollectThreadsUserData;
3482 collect_thread (gpointer key, gpointer value, gpointer user)
3484 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3485 MonoInternalThread *thread = (MonoInternalThread *)value;
3487 if (ud->nthreads < ud->max_threads)
3488 ud->threads [ud->nthreads ++] = thread;
3492 * Collect running threads into the THREADS array.
3493 * THREADS should be an array allocated on the stack.
3496 collect_threads (MonoInternalThread **thread_array, int max_threads)
3498 CollectThreadsUserData ud;
3500 memset (&ud, 0, sizeof (ud));
3501 /* This array contains refs, but its on the stack, so its ok */
3502 ud.threads = thread_array;
3503 ud.max_threads = max_threads;
3505 mono_threads_lock ();
3506 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3507 mono_threads_unlock ();
3513 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3515 GString* text = g_string_new (0);
3517 GError *error = NULL;
3520 ud->thread = thread;
3523 /* Collect frames for the thread */
3524 if (thread == mono_thread_internal_current ()) {
3525 get_thread_dump (mono_thread_info_current (), ud);
3527 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3531 * Do all the non async-safe work outside of get_thread_dump.
3534 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3536 g_string_append_printf (text, "\n\"%s\"", name);
3539 else if (thread->threadpool_thread) {
3540 g_string_append (text, "\n\"<threadpool thread>\"");
3542 g_string_append (text, "\n\"<unnamed thread>\"");
3545 for (i = 0; i < ud->nframes; ++i) {
3546 MonoStackFrameInfo *frame = &ud->frames [i];
3547 MonoMethod *method = NULL;
3549 if (frame->type == FRAME_TYPE_MANAGED)
3550 method = mono_jit_info_get_method (frame->ji);
3553 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3554 g_string_append_printf (text, " %s\n", location);
3557 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3561 fprintf (stdout, "%s", text->str);
3563 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3564 OutputDebugStringA(text->str);
3567 g_string_free (text, TRUE);
3572 mono_threads_perform_thread_dump (void)
3574 ThreadDumpUserData ud;
3575 MonoInternalThread *thread_array [128];
3576 int tindex, nthreads;
3578 if (!thread_dump_requested)
3581 printf ("Full thread dump:\n");
3583 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3584 nthreads = collect_threads (thread_array, 128);
3586 memset (&ud, 0, sizeof (ud));
3587 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3588 ud.max_frames = 256;
3590 for (tindex = 0; tindex < nthreads; ++tindex)
3591 dump_thread (thread_array [tindex], &ud);
3595 thread_dump_requested = FALSE;
3598 /* Obtain the thread dump of all threads */
3600 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3603 ThreadDumpUserData ud;
3604 MonoInternalThread *thread_array [128];
3605 MonoDomain *domain = mono_domain_get ();
3606 MonoDebugSourceLocation *location;
3607 int tindex, nthreads;
3609 mono_error_init (error);
3611 *out_threads = NULL;
3612 *out_stack_frames = NULL;
3614 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3615 nthreads = collect_threads (thread_array, 128);
3617 memset (&ud, 0, sizeof (ud));
3618 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3619 ud.max_frames = 256;
3621 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3624 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3628 for (tindex = 0; tindex < nthreads; ++tindex) {
3629 MonoInternalThread *thread = thread_array [tindex];
3630 MonoArray *thread_frames;
3636 /* Collect frames for the thread */
3637 if (thread == mono_thread_internal_current ()) {
3638 get_thread_dump (mono_thread_info_current (), &ud);
3640 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3643 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3645 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3648 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3650 for (i = 0; i < ud.nframes; ++i) {
3651 MonoStackFrameInfo *frame = &ud.frames [i];
3652 MonoMethod *method = NULL;
3653 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3657 sf->native_offset = frame->native_offset;
3659 if (frame->type == FRAME_TYPE_MANAGED)
3660 method = mono_jit_info_get_method (frame->ji);
3663 sf->method_address = (gsize) frame->ji->code_start;
3665 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3668 MONO_OBJECT_SETREF (sf, method, rm);
3670 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3672 sf->il_offset = location->il_offset;
3674 if (location && location->source_file) {
3675 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3676 sf->line = location->row;
3677 sf->column = location->column;
3679 mono_debug_free_source_location (location);
3684 mono_array_setref (thread_frames, i, sf);
3690 return is_ok (error);
3694 * mono_threads_request_thread_dump:
3696 * Ask all threads except the current to print their stacktrace to stdout.
3699 mono_threads_request_thread_dump (void)
3701 /*The new thread dump code runs out of the finalizer thread. */
3702 thread_dump_requested = TRUE;
3703 mono_gc_finalize_notify ();
3708 gint allocated; /* +1 so that refs [allocated] == NULL */
3712 typedef struct ref_stack RefStack;
3715 ref_stack_new (gint initial_size)
3719 initial_size = MAX (initial_size, 16) + 1;
3720 rs = g_new0 (RefStack, 1);
3721 rs->refs = g_new0 (gpointer, initial_size);
3722 rs->allocated = initial_size;
3727 ref_stack_destroy (gpointer ptr)
3729 RefStack *rs = (RefStack *)ptr;
3738 ref_stack_push (RefStack *rs, gpointer ptr)
3740 g_assert (rs != NULL);
3742 if (rs->bottom >= rs->allocated) {
3743 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3744 rs->allocated <<= 1;
3745 rs->refs [rs->allocated] = NULL;
3747 rs->refs [rs->bottom++] = ptr;
3751 ref_stack_pop (RefStack *rs)
3753 if (rs == NULL || rs->bottom == 0)
3757 rs->refs [rs->bottom] = NULL;
3761 ref_stack_find (RefStack *rs, gpointer ptr)
3768 for (refs = rs->refs; refs && *refs; refs++) {
3776 * mono_thread_push_appdomain_ref:
3778 * Register that the current thread may have references to objects in domain
3779 * @domain on its stack. Each call to this function should be paired with a
3780 * call to pop_appdomain_ref.
3783 mono_thread_push_appdomain_ref (MonoDomain *domain)
3785 MonoInternalThread *thread = mono_thread_internal_current ();
3788 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3789 SPIN_LOCK (thread->lock_thread_id);
3790 if (thread->appdomain_refs == NULL)
3791 thread->appdomain_refs = ref_stack_new (16);
3792 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3793 SPIN_UNLOCK (thread->lock_thread_id);
3798 mono_thread_pop_appdomain_ref (void)
3800 MonoInternalThread *thread = mono_thread_internal_current ();
3803 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3804 SPIN_LOCK (thread->lock_thread_id);
3805 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3806 SPIN_UNLOCK (thread->lock_thread_id);
3811 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3814 SPIN_LOCK (thread->lock_thread_id);
3815 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3816 SPIN_UNLOCK (thread->lock_thread_id);
3821 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3823 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3826 typedef struct abort_appdomain_data {
3827 struct wait_data wait;
3829 } abort_appdomain_data;
3832 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3834 MonoInternalThread *thread = (MonoInternalThread*)value;
3835 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3836 MonoDomain *domain = data->domain;
3838 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3839 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3841 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3842 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3845 data->wait.handles [data->wait.num] = handle;
3846 data->wait.threads [data->wait.num] = thread;
3849 /* Just ignore the rest, we can't do anything with
3857 * mono_threads_abort_appdomain_threads:
3859 * Abort threads which has references to the given appdomain.
3862 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3864 #ifdef __native_client__
3868 abort_appdomain_data user_data;
3870 int orig_timeout = timeout;
3873 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3875 start_time = mono_msec_ticks ();
3877 mono_threads_lock ();
3879 user_data.domain = domain;
3880 user_data.wait.num = 0;
3881 /* This shouldn't take any locks */
3882 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3883 mono_threads_unlock ();
3885 if (user_data.wait.num > 0) {
3886 /* Abort the threads outside the threads lock */
3887 for (i = 0; i < user_data.wait.num; ++i)
3888 mono_thread_internal_abort (user_data.wait.threads [i]);
3891 * We should wait for the threads either to abort, or to leave the
3892 * domain. We can't do the latter, so we wait with a timeout.
3894 wait_for_tids (&user_data.wait, 100);
3897 /* Update remaining time */
3898 timeout -= mono_msec_ticks () - start_time;
3899 start_time = mono_msec_ticks ();
3901 if (orig_timeout != -1 && timeout < 0)
3904 while (user_data.wait.num > 0);
3906 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3912 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3914 MonoInternalThread *thread = (MonoInternalThread*)value;
3915 MonoDomain *domain = (MonoDomain*)user_data;
3918 /* No locking needed here */
3919 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3921 if (thread->cached_culture_info) {
3922 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3923 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3924 if (obj && obj->vtable->domain == domain)
3925 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3931 * mono_threads_clear_cached_culture:
3933 * Clear the cached_current_culture from all threads if it is in the
3937 mono_threads_clear_cached_culture (MonoDomain *domain)
3939 mono_threads_lock ();
3940 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3941 mono_threads_unlock ();
3945 * mono_thread_get_undeniable_exception:
3947 * Return an exception which needs to be raised when leaving a catch clause.
3948 * This is used for undeniable exception propagation.
3951 mono_thread_get_undeniable_exception (void)
3953 MonoInternalThread *thread = mono_thread_internal_current ();
3955 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3957 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3958 * exception if the thread no longer references a dying appdomain.
3960 thread->abort_exc->trace_ips = NULL;
3961 thread->abort_exc->stack_trace = NULL;
3962 return thread->abort_exc;
3968 #if MONO_SMALL_CONFIG
3969 #define NUM_STATIC_DATA_IDX 4
3970 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3974 #define NUM_STATIC_DATA_IDX 8
3975 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3976 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3980 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3981 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3984 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3986 gpointer *static_data = (gpointer *)addr;
3988 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3989 void **ptr = (void **)static_data [i];
3994 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3995 void **p = ptr + idx;
3998 mark_func ((MonoObject**)p, gc_data);
4004 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4006 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4010 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4012 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4016 * mono_alloc_static_data
4018 * Allocate memory blocks for storing threads or context static data
4021 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4023 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4026 gpointer* static_data = *static_data_ptr;
4028 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4029 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4031 if (mono_gc_user_markers_supported ()) {
4032 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4033 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4035 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4036 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4039 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4040 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4041 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4042 *static_data_ptr = static_data;
4043 static_data [0] = static_data;
4046 for (i = 1; i <= idx; ++i) {
4047 if (static_data [i])
4050 if (mono_gc_user_markers_supported ())
4051 static_data [i] = g_malloc0 (static_data_size [i]);
4053 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4054 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4055 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4060 mono_free_static_data (gpointer* static_data)
4063 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4064 gpointer p = static_data [i];
4068 * At this point, the static data pointer array is still registered with the
4069 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4070 * data. Freeing the individual arrays without first nulling their slots
4071 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4072 * such an already freed array. See bug #13813.
4074 static_data [i] = NULL;
4075 mono_memory_write_barrier ();
4076 if (mono_gc_user_markers_supported ())
4079 mono_gc_free_fixed (p);
4081 mono_gc_free_fixed (static_data);
4085 * mono_init_static_data_info
4087 * Initializes static data counters
4089 static void mono_init_static_data_info (StaticDataInfo *static_data)
4091 static_data->idx = 0;
4092 static_data->offset = 0;
4093 static_data->freelist = NULL;
4097 * mono_alloc_static_data_slot
4099 * Generates an offset for static data. static_data contains the counters
4100 * used to generate it.
4103 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4105 if (!static_data->idx && !static_data->offset) {
4107 * we use the first chunk of the first allocation also as
4108 * an array for the rest of the data
4110 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4112 static_data->offset += align - 1;
4113 static_data->offset &= ~(align - 1);
4114 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4115 static_data->idx ++;
4116 g_assert (size <= static_data_size [static_data->idx]);
4117 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4118 static_data->offset = 0;
4120 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4121 static_data->offset += size;
4126 * ensure thread static fields already allocated are valid for thread
4127 * This function is called when a thread is created or on thread attach.
4130 thread_adjust_static_data (MonoInternalThread *thread)
4132 mono_threads_lock ();
4133 if (thread_static_info.offset || thread_static_info.idx > 0) {
4134 /* get the current allocated size */
4135 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4136 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4138 mono_threads_unlock ();
4142 * LOCKING: requires that threads_mutex is held
4145 context_adjust_static_data (MonoAppContext *ctx)
4147 if (context_static_info.offset || context_static_info.idx > 0) {
4148 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4149 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4150 ctx->data->static_data = ctx->static_data;
4155 * LOCKING: requires that threads_mutex is held
4158 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4160 MonoInternalThread *thread = (MonoInternalThread *)value;
4161 guint32 offset = GPOINTER_TO_UINT (user);
4163 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4167 * LOCKING: requires that threads_mutex is held
4170 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4172 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4177 guint32 offset = GPOINTER_TO_UINT (user);
4178 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4179 ctx->data->static_data = ctx->static_data;
4182 static StaticDataFreeList*
4183 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4185 StaticDataFreeList* prev = NULL;
4186 StaticDataFreeList* tmp = static_data->freelist;
4188 if (tmp->size == size) {
4190 prev->next = tmp->next;
4192 static_data->freelist = tmp->next;
4201 #if SIZEOF_VOID_P == 4
4208 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4210 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4212 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4213 MonoBitSet *rb = sets [idx];
4214 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4215 offset /= sizeof (uintptr_t);
4216 /* offset is now the bitmap offset */
4217 for (int i = 0; i < numbits; ++i) {
4218 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4219 mono_bitset_set_fast (rb, offset + i);
4224 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4226 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4227 MonoBitSet *rb = sets [idx];
4228 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4229 offset /= sizeof (uintptr_t);
4230 /* offset is now the bitmap offset */
4231 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4232 mono_bitset_clear_fast (rb, offset + i);
4236 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4238 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4240 StaticDataInfo *info;
4243 if (static_type == SPECIAL_STATIC_THREAD) {
4244 info = &thread_static_info;
4245 sets = thread_reference_bitmaps;
4247 info = &context_static_info;
4248 sets = context_reference_bitmaps;
4251 mono_threads_lock ();
4253 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4257 offset = item->offset;
4260 offset = mono_alloc_static_data_slot (info, size, align);
4263 update_reference_bitmap (sets, offset, bitmap, numbits);
4265 if (static_type == SPECIAL_STATIC_THREAD) {
4266 /* This can be called during startup */
4267 if (threads != NULL)
4268 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4270 if (contexts != NULL)
4271 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4273 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4276 mono_threads_unlock ();
4282 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4284 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4286 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4287 return get_thread_static_data (thread, offset);
4289 return get_context_static_data (thread->current_appcontext, offset);
4294 mono_get_special_static_data (guint32 offset)
4296 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4305 * LOCKING: requires that threads_mutex is held
4308 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4310 MonoInternalThread *thread = (MonoInternalThread *)value;
4311 OffsetSize *data = (OffsetSize *)user;
4312 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4313 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4316 if (!thread->static_data || !thread->static_data [idx])
4318 ptr = ((char*) thread->static_data [idx]) + off;
4319 mono_gc_bzero_atomic (ptr, data->size);
4323 * LOCKING: requires that threads_mutex is held
4326 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4328 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4333 OffsetSize *data = (OffsetSize *)user;
4334 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4335 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4338 if (!ctx->static_data || !ctx->static_data [idx])
4341 ptr = ((char*) ctx->static_data [idx]) + off;
4342 mono_gc_bzero_atomic (ptr, data->size);
4346 do_free_special_slot (guint32 offset, guint32 size)
4348 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4350 StaticDataInfo *info;
4352 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4353 info = &thread_static_info;
4354 sets = thread_reference_bitmaps;
4356 info = &context_static_info;
4357 sets = context_reference_bitmaps;
4360 guint32 data_offset = offset;
4361 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4362 OffsetSize data = { data_offset, size };
4364 clear_reference_bitmap (sets, data.offset, data.size);
4366 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4367 if (threads != NULL)
4368 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4370 if (contexts != NULL)
4371 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4374 if (!mono_runtime_is_shutting_down ()) {
4375 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4377 item->offset = offset;
4380 item->next = info->freelist;
4381 info->freelist = item;
4386 do_free_special (gpointer key, gpointer value, gpointer data)
4388 MonoClassField *field = (MonoClassField *)key;
4389 guint32 offset = GPOINTER_TO_UINT (value);
4392 size = mono_type_size (field->type, &align);
4393 do_free_special_slot (offset, size);
4397 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4399 mono_threads_lock ();
4401 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4403 mono_threads_unlock ();
4407 static void CALLBACK dummy_apc (ULONG_PTR param)
4413 * mono_thread_execute_interruption
4415 * Performs the operation that the requested thread state requires (abort,
4418 static MonoException*
4419 mono_thread_execute_interruption (void)
4421 MonoInternalThread *thread = mono_thread_internal_current ();
4422 MonoThread *sys_thread = mono_thread_current ();
4424 LOCK_THREAD (thread);
4426 /* MonoThread::interruption_requested can only be changed with atomics */
4427 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4428 /* this will consume pending APC calls */
4430 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4432 InterlockedDecrement (&thread_interruption_requested);
4434 /* Clear the interrupted flag of the thread so it can wait again */
4435 mono_thread_info_clear_self_interrupt ();
4438 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4439 if (sys_thread->pending_exception) {
4442 exc = sys_thread->pending_exception;
4443 sys_thread->pending_exception = NULL;
4445 UNLOCK_THREAD (thread);
4447 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4448 UNLOCK_THREAD (thread);
4449 g_assert (sys_thread->pending_exception == NULL);
4450 if (thread->abort_exc == NULL) {
4452 * This might be racy, but it has to be called outside the lock
4453 * since it calls managed code.
4455 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4457 return thread->abort_exc;
4459 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4460 /* calls UNLOCK_THREAD (thread) */
4461 self_suspend_internal ();
4464 else if ((thread->state & ThreadState_StopRequested) != 0) {
4465 /* FIXME: do this through the JIT? */
4467 UNLOCK_THREAD (thread);
4469 mono_thread_exit ();
4471 } else if (thread->thread_interrupt_requested) {
4473 thread->thread_interrupt_requested = FALSE;
4474 UNLOCK_THREAD (thread);
4476 return(mono_get_exception_thread_interrupted ());
4479 UNLOCK_THREAD (thread);
4485 * mono_thread_request_interruption
4487 * A signal handler can call this method to request the interruption of a
4488 * thread. The result of the interruption will depend on the current state of
4489 * the thread. If the result is an exception that needs to be throw, it is
4490 * provided as return value.
4493 mono_thread_request_interruption (gboolean running_managed)
4495 MonoInternalThread *thread = mono_thread_internal_current ();
4497 /* The thread may already be stopping */
4502 if (thread->interrupt_on_stop &&
4503 thread->state & ThreadState_StopRequested &&
4504 thread->state & ThreadState_Background)
4508 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4510 InterlockedIncrement (&thread_interruption_requested);
4512 if (!running_managed || is_running_protected_wrapper ()) {
4513 /* Can't stop while in unmanaged code. Increase the global interruption
4514 request count. When exiting the unmanaged method the count will be
4515 checked and the thread will be interrupted. */
4517 /* this will awake the thread if it is in WaitForSingleObject
4519 /* Our implementation of this function ignores the func argument */
4521 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4523 mono_thread_info_self_interrupt ();
4528 return mono_thread_execute_interruption ();
4532 /*This function should be called by a thread after it has exited all of
4533 * its handle blocks at interruption time.*/
4535 mono_thread_resume_interruption (void)
4537 MonoInternalThread *thread = mono_thread_internal_current ();
4538 gboolean still_aborting;
4540 /* The thread may already be stopping */
4544 LOCK_THREAD (thread);
4545 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4546 UNLOCK_THREAD (thread);
4548 /*This can happen if the protected block called Thread::ResetAbort*/
4549 if (!still_aborting)
4552 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4554 InterlockedIncrement (&thread_interruption_requested);
4556 mono_thread_info_self_interrupt ();
4558 return mono_thread_execute_interruption ();
4561 gboolean mono_thread_interruption_requested ()
4563 if (thread_interruption_requested) {
4564 MonoInternalThread *thread = mono_thread_internal_current ();
4565 /* The thread may already be stopping */
4567 return (thread->interruption_requested);
4572 static MonoException*
4573 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4575 MonoInternalThread *thread = mono_thread_internal_current ();
4577 /* The thread may already be stopping */
4581 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4582 MonoException* exc = mono_thread_execute_interruption ();
4590 * Performs the interruption of the current thread, if one has been requested,
4591 * and the thread is not running a protected wrapper.
4592 * Return the exception which needs to be thrown, if any.
4595 mono_thread_interruption_checkpoint (void)
4597 return mono_thread_interruption_checkpoint_request (FALSE);
4601 * Performs the interruption of the current thread, if one has been requested.
4602 * Return the exception which needs to be thrown, if any.
4605 mono_thread_force_interruption_checkpoint_noraise (void)
4607 return mono_thread_interruption_checkpoint_request (TRUE);
4611 * mono_set_pending_exception:
4613 * Set the pending exception of the current thread to EXC.
4614 * The exception will be thrown when execution returns to managed code.
4617 mono_set_pending_exception (MonoException *exc)
4619 MonoThread *thread = mono_thread_current ();
4621 /* The thread may already be stopping */
4625 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4627 mono_thread_request_interruption (FALSE);
4631 * mono_thread_interruption_request_flag:
4633 * Returns the address of a flag that will be non-zero if an interruption has
4634 * been requested for a thread. The thread to interrupt may not be the current
4635 * thread, so an additional call to mono_thread_interruption_requested() or
4636 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4639 gint32* mono_thread_interruption_request_flag ()
4641 return &thread_interruption_requested;
4645 mono_thread_init_apartment_state (void)
4648 MonoInternalThread* thread = mono_thread_internal_current ();
4650 /* Positive return value indicates success, either
4651 * S_OK if this is first CoInitialize call, or
4652 * S_FALSE if CoInitialize already called, but with same
4653 * threading model. A negative value indicates failure,
4654 * probably due to trying to change the threading model.
4656 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4657 ? COINIT_APARTMENTTHREADED
4658 : COINIT_MULTITHREADED) < 0) {
4659 thread->apartment_state = ThreadApartmentState_Unknown;
4665 mono_thread_cleanup_apartment_state (void)
4668 MonoInternalThread* thread = mono_thread_internal_current ();
4670 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4677 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4679 LOCK_THREAD (thread);
4680 thread->state |= state;
4681 UNLOCK_THREAD (thread);
4685 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4687 LOCK_THREAD (thread);
4688 thread->state &= ~state;
4689 UNLOCK_THREAD (thread);
4693 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4695 gboolean ret = FALSE;
4697 LOCK_THREAD (thread);
4699 if ((thread->state & test) != 0) {
4703 UNLOCK_THREAD (thread);
4708 static gboolean has_tls_get = FALSE;
4711 mono_runtime_set_has_tls_get (gboolean val)
4717 mono_runtime_has_tls_get (void)
4723 self_interrupt_thread (void *_unused)
4725 MonoThreadInfo *info = mono_thread_info_current ();
4726 MonoException *exc = mono_thread_execute_interruption ();
4727 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4728 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. */
4729 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4733 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4737 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4741 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4743 MonoJitInfo **dest = (MonoJitInfo **)data;
4749 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4751 MonoJitInfo *ji = NULL;
4756 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4757 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4758 * where we hold runtime locks.
4760 if (!mono_threads_is_coop_enabled ())
4761 mono_thread_info_set_is_async_context (TRUE);
4762 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4763 if (!mono_threads_is_coop_enabled ())
4764 mono_thread_info_set_is_async_context (FALSE);
4769 MonoInternalThread *thread;
4770 gboolean install_async_abort;
4771 MonoThreadInfoInterruptToken *interrupt_token;
4774 static SuspendThreadResult
4775 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4777 AbortThreadData *data = (AbortThreadData *)ud;
4778 MonoInternalThread *thread = data->thread;
4779 MonoJitInfo *ji = NULL;
4780 gboolean protected_wrapper;
4781 gboolean running_managed;
4783 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4784 return MonoResumeThread;
4786 /*someone is already interrupting it*/
4787 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4788 return MonoResumeThread;
4790 InterlockedIncrement (&thread_interruption_requested);
4792 ji = mono_thread_info_get_last_managed (info);
4793 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4794 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4796 if (!protected_wrapper && running_managed) {
4797 /*We are in managed code*/
4798 /*Set the thread to call */
4799 if (data->install_async_abort)
4800 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4801 return MonoResumeThread;
4804 * This will cause waits to be broken.
4805 * It will also prevent the thread from entering a wait, so if the thread returns
4806 * from the wait before it receives the abort signal, it will just spin in the wait
4807 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4810 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4812 return MonoResumeThread;
4817 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4819 AbortThreadData data;
4821 g_assert (thread != mono_thread_internal_current ());
4823 data.thread = thread;
4824 data.install_async_abort = install_async_abort;
4825 data.interrupt_token = NULL;
4827 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4828 if (data.interrupt_token)
4829 mono_thread_info_finish_interrupt (data.interrupt_token);
4830 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4834 self_abort_internal (MonoError *error)
4838 mono_error_init (error);
4840 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4841 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4843 exc = mono_thread_request_interruption (TRUE);
4845 mono_error_set_exception_instance (error, exc);
4847 mono_thread_info_self_interrupt ();
4851 MonoInternalThread *thread;
4853 MonoThreadInfoInterruptToken *interrupt_token;
4854 } SuspendThreadData;
4856 static SuspendThreadResult
4857 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4859 SuspendThreadData *data = (SuspendThreadData *)ud;
4860 MonoInternalThread *thread = data->thread;
4861 MonoJitInfo *ji = NULL;
4862 gboolean protected_wrapper;
4863 gboolean running_managed;
4865 ji = mono_thread_info_get_last_managed (info);
4866 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4867 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4869 if (running_managed && !protected_wrapper) {
4870 thread->state &= ~ThreadState_SuspendRequested;
4871 thread->state |= ThreadState_Suspended;
4872 return KeepSuspended;
4874 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4875 InterlockedIncrement (&thread_interruption_requested);
4876 if (data->interrupt)
4877 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4879 return MonoResumeThread;
4883 /* LOCKING: called with @thread synch_cs held, and releases it */
4885 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4887 SuspendThreadData data;
4889 g_assert (thread != mono_thread_internal_current ());
4891 data.thread = thread;
4892 data.interrupt = interrupt;
4893 data.interrupt_token = NULL;
4895 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4896 if (data.interrupt_token)
4897 mono_thread_info_finish_interrupt (data.interrupt_token);
4899 UNLOCK_THREAD (thread);
4902 /* LOCKING: called with @thread synch_cs held, and releases it */
4904 self_suspend_internal (void)
4906 MonoInternalThread *thread;
4908 thread = mono_thread_internal_current ();
4910 mono_thread_info_begin_self_suspend ();
4911 thread->state &= ~ThreadState_SuspendRequested;
4912 thread->state |= ThreadState_Suspended;
4914 UNLOCK_THREAD (thread);
4916 mono_thread_info_end_self_suspend ();
4920 * mono_thread_is_foreign:
4921 * @thread: the thread to query
4923 * This function allows one to determine if a thread was created by the mono runtime and has
4924 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4926 * Returns: TRUE if @thread was not created by the runtime.
4929 mono_thread_is_foreign (MonoThread *thread)
4931 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4932 return info->runtime_thread == FALSE;
4936 * mono_add_joinable_thread:
4938 * Add TID to the list of joinable threads.
4939 * LOCKING: Acquires the threads lock.
4942 mono_threads_add_joinable_thread (gpointer tid)
4946 * We cannot detach from threads because it causes problems like
4947 * 2fd16f60/r114307. So we collect them and join them when
4948 * we have time (in he finalizer thread).
4950 joinable_threads_lock ();
4951 if (!joinable_threads)
4952 joinable_threads = g_hash_table_new (NULL, NULL);
4953 g_hash_table_insert (joinable_threads, tid, tid);
4954 joinable_thread_count ++;
4955 joinable_threads_unlock ();
4957 mono_gc_finalize_notify ();
4962 * mono_threads_join_threads:
4964 * Join all joinable threads. This is called from the finalizer thread.
4965 * LOCKING: Acquires the threads lock.
4968 mono_threads_join_threads (void)
4971 GHashTableIter iter;
4978 if (!joinable_thread_count)
4982 joinable_threads_lock ();
4984 if (g_hash_table_size (joinable_threads)) {
4985 g_hash_table_iter_init (&iter, joinable_threads);
4986 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4987 thread = (pthread_t)tid;
4988 g_hash_table_remove (joinable_threads, key);
4989 joinable_thread_count --;
4992 joinable_threads_unlock ();
4994 if (thread != pthread_self ())
4995 /* This shouldn't block */
4996 pthread_join (thread, NULL);
5007 * Wait for thread TID to exit.
5008 * LOCKING: Acquires the threads lock.
5011 mono_thread_join (gpointer tid)
5015 gboolean found = FALSE;
5017 joinable_threads_lock ();
5018 if (!joinable_threads)
5019 joinable_threads = g_hash_table_new (NULL, NULL);
5020 if (g_hash_table_lookup (joinable_threads, tid)) {
5021 g_hash_table_remove (joinable_threads, tid);
5022 joinable_thread_count --;
5025 joinable_threads_unlock ();
5028 thread = (pthread_t)tid;
5029 pthread_join (thread, NULL);
5034 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5036 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5037 mono_thread_interruption_checkpoint ();
5040 static inline gboolean
5041 is_appdomainunloaded_exception (MonoClass *klass)
5043 return klass == mono_class_get_appdomain_unloaded_exception_class ();
5046 static inline gboolean
5047 is_threadabort_exception (MonoClass *klass)
5049 return klass == mono_defaults.threadabortexception_class;
5053 mono_thread_internal_unhandled_exception (MonoObject* exc)
5055 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5056 MonoClass *klass = exc->vtable->klass;
5057 if (is_threadabort_exception (klass)) {
5058 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5059 } else if (!is_appdomainunloaded_exception (klass)) {
5060 mono_unhandled_exception (exc);
5061 if (mono_environment_exitcode_get () == 1)
5068 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5071 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5072 mono_error_set_pending_exception (&error);
5076 * mono_threads_attach_coop: called by native->managed wrappers
5080 * - @return: the original domain which needs to be restored, or NULL.
5083 * - @dummy: contains the original domain
5084 * - @return: a cookie containing current MonoThreadInfo*.
5087 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5090 gboolean fresh_thread;
5093 /* Happens when called from AOTed code which is only used in the root domain. */
5094 domain = mono_get_root_domain ();
5099 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5100 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5101 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5102 * we're only responsible for making the cookie. */
5103 if (mono_threads_is_coop_enabled ()) {
5104 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5105 fresh_thread = !info || !mono_thread_info_is_live (info);
5108 if (!mono_thread_internal_current ()) {
5109 mono_thread_attach_full (domain, FALSE);
5112 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5115 orig = mono_domain_get ();
5117 mono_domain_set (domain, TRUE);
5119 if (!mono_threads_is_coop_enabled ())
5120 return orig != domain ? orig : NULL;
5124 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5125 * return the right cookie. */
5126 return mono_threads_enter_gc_unsafe_region_cookie (mono_thread_info_current ());
5129 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5130 return mono_threads_enter_gc_unsafe_region (dummy);
5135 * mono_threads_detach_coop: called by native->managed wrappers
5138 * - @cookie: the original domain which needs to be restored, or NULL.
5142 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5143 * - @dummy: contains the original domain
5146 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5148 MonoDomain *domain, *orig;
5150 if (!mono_threads_is_coop_enabled ()) {
5151 orig = (MonoDomain*) cookie;
5153 mono_domain_set (orig, TRUE);
5155 orig = (MonoDomain*) *dummy;
5157 domain = mono_domain_get ();
5160 /* it won't do anything if cookie is NULL
5161 * thread state RUNNING -> (RUNNING|BLOCKING) */
5162 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5164 if (orig != domain) {
5166 mono_domain_unset ();
5168 mono_domain_set (orig, TRUE);