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_checked (name, error);
1390 return_if_nok (error);
1391 mono_profiler_thread_name (this_obj->tid, tname);
1392 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1398 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1401 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1402 mono_error_set_pending_exception (&error);
1406 * ves_icall_System_Threading_Thread_GetPriority_internal:
1407 * @param this_obj: The MonoInternalThread on which to operate.
1409 * Gets the priority of the given thread.
1410 * @return: The priority of the given thread.
1413 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1416 MonoInternalThread *internal = this_obj->internal_thread;
1418 LOCK_THREAD (internal);
1419 priority = GetThreadPriority (internal->handle) + 2;
1420 UNLOCK_THREAD (internal);
1425 * ves_icall_System_Threading_Thread_SetPriority_internal:
1426 * @param this_obj: The MonoInternalThread on which to operate.
1427 * @param priority: The priority to set.
1429 * Sets the priority of the given thread.
1432 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1434 MonoInternalThread *internal = this_obj->internal_thread;
1436 LOCK_THREAD (internal);
1437 SetThreadPriority (internal->handle, priority - 2);
1438 UNLOCK_THREAD (internal);
1441 /* If the array is already in the requested domain, we just return it,
1442 otherwise we return a copy in that domain. */
1444 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1448 mono_error_init (error);
1452 if (mono_object_domain (arr) == domain)
1455 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1456 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1461 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1464 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1465 mono_error_set_pending_exception (&error);
1470 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1473 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1474 mono_error_set_pending_exception (&error);
1479 mono_thread_current (void)
1481 MonoDomain *domain = mono_domain_get ();
1482 MonoInternalThread *internal = mono_thread_internal_current ();
1483 MonoThread **current_thread_ptr;
1485 g_assert (internal);
1486 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1488 if (!*current_thread_ptr) {
1489 g_assert (domain != mono_get_root_domain ());
1490 *current_thread_ptr = new_thread_with_internal (domain, internal);
1492 return *current_thread_ptr;
1495 /* Return the thread object belonging to INTERNAL in the current domain */
1497 mono_thread_current_for_thread (MonoInternalThread *internal)
1499 MonoDomain *domain = mono_domain_get ();
1500 MonoThread **current_thread_ptr;
1502 g_assert (internal);
1503 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1505 if (!*current_thread_ptr) {
1506 g_assert (domain != mono_get_root_domain ());
1507 *current_thread_ptr = new_thread_with_internal (domain, internal);
1509 return *current_thread_ptr;
1513 mono_thread_internal_current (void)
1515 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1516 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1521 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1523 MonoInternalThread *thread = this_obj->internal_thread;
1524 HANDLE handle = thread->handle;
1525 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1528 if (mono_thread_current_check_pending_interrupt ())
1531 LOCK_THREAD (thread);
1533 if ((thread->state & ThreadState_Unstarted) != 0) {
1534 UNLOCK_THREAD (thread);
1536 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1540 UNLOCK_THREAD (thread);
1545 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1547 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1550 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1553 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1555 if(ret==WAIT_OBJECT_0) {
1556 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1561 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1566 #define MANAGED_WAIT_FAILED 0x7fffffff
1569 map_native_wait_result_to_managed (gint32 val)
1571 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1572 return val == WAIT_FAILED ? MANAGED_WAIT_FAILED : val;
1576 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1584 mono_error_init (error);
1586 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1589 if (numhandles != 1)
1590 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE);
1592 ret = WaitForSingleObjectEx (handles [0], ms, TRUE);
1595 if (ret != WAIT_IO_COMPLETION)
1598 exc = mono_thread_execute_interruption ();
1600 mono_error_set_exception_instance (error, exc);
1607 /* Re-calculate ms according to the time passed */
1608 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1609 if (diff_ms >= ms) {
1613 wait = ms - diff_ms;
1619 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1626 MonoObject *waitHandle;
1627 MonoInternalThread *thread = mono_thread_internal_current ();
1629 /* Do this WaitSleepJoin check before creating objects */
1630 if (mono_thread_current_check_pending_interrupt ())
1631 return map_native_wait_result_to_managed (WAIT_FAILED);
1633 /* We fail in managed if the array has more than 64 elements */
1634 numhandles = (guint32)mono_array_length(mono_handles);
1635 handles = g_new0(HANDLE, numhandles);
1637 for(i = 0; i < numhandles; i++) {
1638 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1639 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1646 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1648 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1650 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1654 mono_error_set_pending_exception (&error);
1656 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1657 return map_native_wait_result_to_managed (ret);
1660 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1663 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1664 uintptr_t numhandles;
1667 MonoObject *waitHandle;
1668 MonoInternalThread *thread = mono_thread_internal_current ();
1670 /* Do this WaitSleepJoin check before creating objects */
1671 if (mono_thread_current_check_pending_interrupt ())
1672 return map_native_wait_result_to_managed (WAIT_FAILED);
1674 numhandles = mono_array_length(mono_handles);
1675 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1676 return map_native_wait_result_to_managed (WAIT_FAILED);
1678 for(i = 0; i < numhandles; i++) {
1679 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1680 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1687 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1689 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1691 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1693 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1695 mono_error_set_pending_exception (&error);
1697 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1699 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1700 return map_native_wait_result_to_managed (ret - WAIT_OBJECT_0);
1702 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1703 return map_native_wait_result_to_managed (ret - WAIT_ABANDONED_0);
1706 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1707 return map_native_wait_result_to_managed (ret);
1711 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1715 MonoInternalThread *thread = mono_thread_internal_current ();
1717 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1723 if (mono_thread_current_check_pending_interrupt ())
1724 return map_native_wait_result_to_managed (WAIT_FAILED);
1726 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1728 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1730 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1732 mono_error_set_pending_exception (&error);
1733 return map_native_wait_result_to_managed (ret);
1737 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1740 MonoInternalThread *thread = mono_thread_internal_current ();
1745 if (mono_thread_current_check_pending_interrupt ())
1746 return map_native_wait_result_to_managed (WAIT_FAILED);
1748 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1751 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1754 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1756 return map_native_wait_result_to_managed (ret);
1759 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1766 mutex = CreateMutex (NULL, owned, NULL);
1768 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1770 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1778 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1779 return(ReleaseMutex (handle));
1782 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1788 *error = ERROR_SUCCESS;
1790 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1792 *error = GetLastError ();
1799 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1806 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1808 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1809 mono_string_chars (name));
1811 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1819 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1823 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1828 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1832 *error = ERROR_SUCCESS;
1834 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1836 *error = GetLastError ();
1842 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1849 event = CreateEvent (NULL, manual, initial, NULL);
1851 event = CreateEvent (NULL, manual, initial,
1852 mono_string_chars (name));
1854 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1862 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1863 return (SetEvent(handle));
1866 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1867 return (ResetEvent(handle));
1871 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1872 CloseHandle (handle);
1875 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1881 *error = ERROR_SUCCESS;
1883 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1885 *error = GetLastError ();
1891 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1893 return InterlockedIncrement (location);
1896 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1898 #if SIZEOF_VOID_P == 4
1899 if (G_UNLIKELY ((size_t)location & 0x7)) {
1901 mono_interlocked_lock ();
1904 mono_interlocked_unlock ();
1908 return InterlockedIncrement64 (location);
1911 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1913 return InterlockedDecrement(location);
1916 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1918 #if SIZEOF_VOID_P == 4
1919 if (G_UNLIKELY ((size_t)location & 0x7)) {
1921 mono_interlocked_lock ();
1924 mono_interlocked_unlock ();
1928 return InterlockedDecrement64 (location);
1931 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1933 return InterlockedExchange(location, value);
1936 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1939 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1940 mono_gc_wbarrier_generic_nostore (location);
1944 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1946 return InterlockedExchangePointer(location, value);
1949 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1951 IntFloatUnion val, ret;
1954 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1960 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1962 #if SIZEOF_VOID_P == 4
1963 if (G_UNLIKELY ((size_t)location & 0x7)) {
1965 mono_interlocked_lock ();
1968 mono_interlocked_unlock ();
1972 return InterlockedExchange64 (location, value);
1976 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1978 LongDoubleUnion val, ret;
1981 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1986 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1988 return InterlockedCompareExchange(location, value, comparand);
1991 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1993 gint32 r = InterlockedCompareExchange(location, value, comparand);
1994 *success = r == comparand;
1998 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2001 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2002 mono_gc_wbarrier_generic_nostore (location);
2006 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2008 return InterlockedCompareExchangePointer(location, value, comparand);
2011 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2013 IntFloatUnion val, ret, cmp;
2016 cmp.fval = comparand;
2017 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2023 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2025 #if SIZEOF_VOID_P == 8
2026 LongDoubleUnion val, comp, ret;
2029 comp.fval = comparand;
2030 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2036 mono_interlocked_lock ();
2038 if (old == comparand)
2040 mono_interlocked_unlock ();
2047 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2049 #if SIZEOF_VOID_P == 4
2050 if (G_UNLIKELY ((size_t)location & 0x7)) {
2052 mono_interlocked_lock ();
2054 if (old == comparand)
2056 mono_interlocked_unlock ();
2060 return InterlockedCompareExchange64 (location, value, comparand);
2064 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2067 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2068 mono_gc_wbarrier_generic_nostore (location);
2073 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2076 MONO_CHECK_NULL (location, NULL);
2077 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2078 mono_gc_wbarrier_generic_nostore (location);
2083 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2085 return InterlockedAdd (location, value);
2089 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2091 #if SIZEOF_VOID_P == 4
2092 if (G_UNLIKELY ((size_t)location & 0x7)) {
2094 mono_interlocked_lock ();
2097 mono_interlocked_unlock ();
2101 return InterlockedAdd64 (location, value);
2105 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2107 #if SIZEOF_VOID_P == 4
2108 if (G_UNLIKELY ((size_t)location & 0x7)) {
2110 mono_interlocked_lock ();
2112 mono_interlocked_unlock ();
2116 return InterlockedRead64 (location);
2120 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2122 mono_memory_barrier ();
2126 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2128 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2130 if (state & ThreadState_Background) {
2131 /* If the thread changes the background mode, the main thread has to
2132 * be notified, since it has to rebuild the list of threads to
2135 SetEvent (background_change_event);
2140 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2142 mono_thread_set_state (this_obj, (MonoThreadState)state);
2144 if (state & ThreadState_Background) {
2145 /* If the thread changes the background mode, the main thread has to
2146 * be notified, since it has to rebuild the list of threads to
2149 SetEvent (background_change_event);
2154 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2158 LOCK_THREAD (this_obj);
2160 state = this_obj->state;
2162 UNLOCK_THREAD (this_obj);
2167 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2169 MonoInternalThread *current;
2171 MonoInternalThread *thread = this_obj->internal_thread;
2173 LOCK_THREAD (thread);
2175 current = mono_thread_internal_current ();
2177 thread->thread_interrupt_requested = TRUE;
2178 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2180 UNLOCK_THREAD (thread);
2183 async_abort_internal (thread, FALSE);
2188 * mono_thread_current_check_pending_interrupt:
2190 * Checks if there's a interruption request and set the pending exception if so.
2192 * @returns true if a pending exception was set
2195 mono_thread_current_check_pending_interrupt (void)
2197 MonoInternalThread *thread = mono_thread_internal_current ();
2198 gboolean throw_ = FALSE;
2200 LOCK_THREAD (thread);
2202 if (thread->thread_interrupt_requested) {
2204 thread->thread_interrupt_requested = FALSE;
2207 UNLOCK_THREAD (thread);
2210 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2215 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2217 LOCK_THREAD (thread);
2219 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2220 (thread->state & ThreadState_StopRequested) != 0 ||
2221 (thread->state & ThreadState_Stopped) != 0)
2223 UNLOCK_THREAD (thread);
2227 if ((thread->state & ThreadState_Unstarted) != 0) {
2228 thread->state |= ThreadState_Aborted;
2229 UNLOCK_THREAD (thread);
2233 thread->state |= ThreadState_AbortRequested;
2234 if (thread->abort_state_handle)
2235 mono_gchandle_free (thread->abort_state_handle);
2237 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2238 g_assert (thread->abort_state_handle);
2240 thread->abort_state_handle = 0;
2242 thread->abort_exc = NULL;
2244 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));
2246 /* During shutdown, we can't wait for other threads */
2248 /* Make sure the thread is awake */
2249 mono_thread_resume (thread);
2251 UNLOCK_THREAD (thread);
2256 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2258 if (!request_thread_abort (thread, state))
2261 if (thread == mono_thread_internal_current ()) {
2263 self_abort_internal (&error);
2264 mono_error_set_pending_exception (&error);
2266 async_abort_internal (thread, TRUE);
2271 * mono_thread_internal_abort:
2273 * Request thread @thread to be aborted.
2275 * @thread MUST NOT be the current thread.
2278 mono_thread_internal_abort (MonoInternalThread *thread)
2280 g_assert (thread != mono_thread_internal_current ());
2282 if (!request_thread_abort (thread, NULL))
2284 async_abort_internal (thread, TRUE);
2288 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2290 MonoInternalThread *thread = mono_thread_internal_current ();
2291 gboolean was_aborting;
2293 LOCK_THREAD (thread);
2294 was_aborting = thread->state & ThreadState_AbortRequested;
2295 thread->state &= ~ThreadState_AbortRequested;
2296 UNLOCK_THREAD (thread);
2298 if (!was_aborting) {
2299 const char *msg = "Unable to reset abort because no abort was requested";
2300 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2303 thread->abort_exc = NULL;
2304 if (thread->abort_state_handle) {
2305 mono_gchandle_free (thread->abort_state_handle);
2306 /* This is actually not necessary - the handle
2307 only counts if the exception is set */
2308 thread->abort_state_handle = 0;
2313 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2315 LOCK_THREAD (thread);
2317 thread->state &= ~ThreadState_AbortRequested;
2319 if (thread->abort_exc) {
2320 thread->abort_exc = NULL;
2321 if (thread->abort_state_handle) {
2322 mono_gchandle_free (thread->abort_state_handle);
2323 /* This is actually not necessary - the handle
2324 only counts if the exception is set */
2325 thread->abort_state_handle = 0;
2329 UNLOCK_THREAD (thread);
2333 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2336 MonoInternalThread *thread = this_obj->internal_thread;
2337 MonoObject *state, *deserialized = NULL;
2340 if (!thread->abort_state_handle)
2343 state = mono_gchandle_get_target (thread->abort_state_handle);
2346 domain = mono_domain_get ();
2347 if (mono_object_domain (state) == domain)
2350 deserialized = mono_object_xdomain_representation (state, domain, &error);
2352 if (!deserialized) {
2353 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2354 if (!is_ok (&error)) {
2355 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2356 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2358 mono_set_pending_exception (invalid_op_exc);
2362 return deserialized;
2366 mono_thread_suspend (MonoInternalThread *thread)
2368 LOCK_THREAD (thread);
2370 if ((thread->state & ThreadState_Unstarted) != 0 ||
2371 (thread->state & ThreadState_Aborted) != 0 ||
2372 (thread->state & ThreadState_Stopped) != 0)
2374 UNLOCK_THREAD (thread);
2378 if ((thread->state & ThreadState_Suspended) != 0 ||
2379 (thread->state & ThreadState_SuspendRequested) != 0 ||
2380 (thread->state & ThreadState_StopRequested) != 0)
2382 UNLOCK_THREAD (thread);
2386 thread->state |= ThreadState_SuspendRequested;
2388 if (thread == mono_thread_internal_current ()) {
2389 /* calls UNLOCK_THREAD (thread) */
2390 self_suspend_internal ();
2392 /* calls UNLOCK_THREAD (thread) */
2393 async_suspend_internal (thread, FALSE);
2400 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2402 if (!mono_thread_suspend (this_obj->internal_thread)) {
2403 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2408 /* LOCKING: LOCK_THREAD(thread) must be held */
2410 mono_thread_resume (MonoInternalThread *thread)
2412 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2413 thread->state &= ~ThreadState_SuspendRequested;
2417 if ((thread->state & ThreadState_Suspended) == 0 ||
2418 (thread->state & ThreadState_Unstarted) != 0 ||
2419 (thread->state & ThreadState_Aborted) != 0 ||
2420 (thread->state & ThreadState_Stopped) != 0)
2425 UNLOCK_THREAD (thread);
2427 /* Awake the thread */
2428 if (!mono_thread_info_resume (thread_get_tid (thread)))
2431 LOCK_THREAD (thread);
2433 thread->state &= ~ThreadState_Suspended;
2439 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2441 if (!thread->internal_thread) {
2442 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2444 LOCK_THREAD (thread->internal_thread);
2445 if (!mono_thread_resume (thread->internal_thread))
2446 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2447 UNLOCK_THREAD (thread->internal_thread);
2452 mono_threads_is_critical_method (MonoMethod *method)
2454 switch (method->wrapper_type) {
2455 case MONO_WRAPPER_RUNTIME_INVOKE:
2456 case MONO_WRAPPER_XDOMAIN_INVOKE:
2457 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2464 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2469 if (mono_threads_is_critical_method (m)) {
2470 *((gboolean*)data) = TRUE;
2477 is_running_protected_wrapper (void)
2479 gboolean found = FALSE;
2480 mono_stack_walk (find_wrapper, &found);
2485 request_thread_stop (MonoInternalThread *thread)
2487 LOCK_THREAD (thread);
2489 if ((thread->state & ThreadState_StopRequested) != 0 ||
2490 (thread->state & ThreadState_Stopped) != 0)
2492 UNLOCK_THREAD (thread);
2496 /* Make sure the thread is awake */
2497 mono_thread_resume (thread);
2499 thread->state |= ThreadState_StopRequested;
2500 thread->state &= ~ThreadState_AbortRequested;
2502 UNLOCK_THREAD (thread);
2507 * mono_thread_internal_stop:
2509 * Request thread @thread to stop.
2511 * @thread MUST NOT be the current thread.
2514 mono_thread_internal_stop (MonoInternalThread *thread)
2516 g_assert (thread != mono_thread_internal_current ());
2518 if (!request_thread_stop (thread))
2521 async_abort_internal (thread, TRUE);
2524 void mono_thread_stop (MonoThread *thread)
2526 MonoInternalThread *internal = thread->internal_thread;
2528 if (!request_thread_stop (internal))
2531 if (internal == mono_thread_internal_current ()) {
2533 self_abort_internal (&error);
2535 This function is part of the embeding API and has no way to return the exception
2536 to be thrown. So what we do is keep the old behavior and raise the exception.
2538 mono_error_raise_exception (&error);
2540 async_abort_internal (internal, TRUE);
2545 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2547 gint8 tmp = *(volatile gint8 *)ptr;
2548 mono_memory_barrier ();
2553 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2555 gint16 tmp = *(volatile gint16 *)ptr;
2556 mono_memory_barrier ();
2561 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2563 gint32 tmp = *(volatile gint32 *)ptr;
2564 mono_memory_barrier ();
2569 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2571 gint64 tmp = *(volatile gint64 *)ptr;
2572 mono_memory_barrier ();
2577 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2579 volatile void *tmp = *(volatile void **)ptr;
2580 mono_memory_barrier ();
2581 return (void *) tmp;
2585 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2587 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2588 mono_memory_barrier ();
2589 return (MonoObject *) tmp;
2593 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2595 double tmp = *(volatile double *)ptr;
2596 mono_memory_barrier ();
2601 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2603 float tmp = *(volatile float *)ptr;
2604 mono_memory_barrier ();
2609 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2611 return InterlockedRead8 ((volatile gint8 *)ptr);
2615 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2617 return InterlockedRead16 ((volatile gint16 *)ptr);
2621 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2623 return InterlockedRead ((volatile gint32 *)ptr);
2627 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2629 #if SIZEOF_VOID_P == 4
2630 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2632 mono_interlocked_lock ();
2633 val = *(gint64*)ptr;
2634 mono_interlocked_unlock ();
2638 return InterlockedRead64 ((volatile gint64 *)ptr);
2642 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2644 return InterlockedReadPointer ((volatile gpointer *)ptr);
2648 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2652 #if SIZEOF_VOID_P == 4
2653 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2655 mono_interlocked_lock ();
2656 val = *(double*)ptr;
2657 mono_interlocked_unlock ();
2662 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2668 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2672 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2678 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2680 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2684 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2686 mono_memory_barrier ();
2687 *(volatile gint8 *)ptr = value;
2691 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2693 mono_memory_barrier ();
2694 *(volatile gint16 *)ptr = value;
2698 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2700 mono_memory_barrier ();
2701 *(volatile gint32 *)ptr = value;
2705 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2707 mono_memory_barrier ();
2708 *(volatile gint64 *)ptr = value;
2712 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2714 mono_memory_barrier ();
2715 *(volatile void **)ptr = value;
2719 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2721 mono_memory_barrier ();
2722 mono_gc_wbarrier_generic_store (ptr, value);
2726 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2728 mono_memory_barrier ();
2729 *(volatile double *)ptr = value;
2733 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2735 mono_memory_barrier ();
2736 *(volatile float *)ptr = value;
2740 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2742 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2746 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2748 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2752 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2754 InterlockedWrite ((volatile gint32 *)ptr, value);
2758 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2760 #if SIZEOF_VOID_P == 4
2761 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2762 mono_interlocked_lock ();
2763 *(gint64*)ptr = value;
2764 mono_interlocked_unlock ();
2769 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2773 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2775 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2779 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2783 #if SIZEOF_VOID_P == 4
2784 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2785 mono_interlocked_lock ();
2786 *(double*)ptr = value;
2787 mono_interlocked_unlock ();
2794 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2798 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2804 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2808 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2810 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2814 free_context (void *user_data)
2816 ContextStaticData *data = user_data;
2818 mono_threads_lock ();
2821 * There is no guarantee that, by the point this reference queue callback
2822 * has been invoked, the GC handle associated with the object will fail to
2823 * resolve as one might expect. So if we don't free and remove the GC
2824 * handle here, free_context_static_data_helper () could end up resolving
2825 * a GC handle to an actually-dead context which would contain a pointer
2826 * to an already-freed static data segment, resulting in a crash when
2829 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2831 mono_threads_unlock ();
2833 mono_gchandle_free (data->gc_handle);
2834 mono_free_static_data (data->static_data);
2839 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2841 mono_threads_lock ();
2843 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2846 contexts = g_hash_table_new (NULL, NULL);
2849 context_queue = mono_gc_reference_queue_new (free_context);
2851 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2852 g_hash_table_insert (contexts, gch, gch);
2855 * We use this intermediate structure to contain a duplicate pointer to
2856 * the static data because we can't rely on being able to resolve the GC
2857 * handle in the reference queue callback.
2859 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2860 data->gc_handle = GPOINTER_TO_UINT (gch);
2863 context_adjust_static_data (ctx);
2864 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2866 mono_threads_unlock ();
2868 mono_profiler_context_loaded (ctx);
2872 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2875 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2876 * cleanup in exceptional circumstances, we don't actually do any
2877 * cleanup work here. We instead do this via a reference queue.
2880 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2882 mono_profiler_context_unloaded (ctx);
2886 mono_thread_init_tls (void)
2888 MONO_FAST_TLS_INIT (tls_current_object);
2889 mono_native_tls_alloc (¤t_object_key, NULL);
2892 void mono_thread_init (MonoThreadStartCB start_cb,
2893 MonoThreadAttachCB attach_cb)
2895 mono_coop_mutex_init_recursive (&threads_mutex);
2897 mono_os_mutex_init_recursive(&interlocked_mutex);
2898 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2900 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2901 g_assert(background_change_event != NULL);
2903 mono_init_static_data_info (&thread_static_info);
2904 mono_init_static_data_info (&context_static_info);
2906 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2908 mono_thread_start_cb = start_cb;
2909 mono_thread_attach_cb = attach_cb;
2911 /* Get a pseudo handle to the current process. This is just a
2912 * kludge so that wapi can build a process handle if needed.
2913 * As a pseudo handle is returned, we don't need to clean
2916 GetCurrentProcess ();
2919 void mono_thread_cleanup (void)
2921 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2922 MonoThreadInfo *info;
2924 /* The main thread must abandon any held mutexes (particularly
2925 * important for named mutexes as they are shared across
2926 * processes, see bug 74680.) This will happen when the
2927 * thread exits, but if it's not running in a subthread it
2928 * won't exit in time.
2930 info = mono_thread_info_current ();
2931 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2935 /* This stuff needs more testing, it seems one of these
2936 * critical sections can be locked when mono_thread_cleanup is
2939 mono_coop_mutex_destroy (&threads_mutex);
2940 mono_os_mutex_destroy (&interlocked_mutex);
2941 mono_os_mutex_destroy (&delayed_free_table_mutex);
2942 mono_os_mutex_destroy (&small_id_mutex);
2943 CloseHandle (background_change_event);
2946 mono_native_tls_free (current_object_key);
2950 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2952 mono_thread_cleanup_fn = func;
2956 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2958 thread->internal_thread->manage_callback = func;
2962 static void print_tids (gpointer key, gpointer value, gpointer user)
2964 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2965 * sizeof(uint) and a cast to uint would overflow
2967 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2968 * print this as a pointer.
2970 g_message ("Waiting for: %p", key);
2975 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2976 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2980 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2984 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2987 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2990 if(ret==WAIT_FAILED) {
2991 /* See the comment in build_wait_tids() */
2992 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2996 for(i=0; i<wait->num; i++)
2997 CloseHandle (wait->handles[i]);
2999 if (ret == WAIT_TIMEOUT)
3002 for(i=0; i<wait->num; i++) {
3003 gsize tid = wait->threads[i]->tid;
3006 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
3007 * it can still run io-layer etc. code. So wait for it to really exit.
3008 * FIXME: This won't join threads which are not in the joinable_hash yet.
3010 mono_thread_join ((gpointer)tid);
3012 mono_threads_lock ();
3013 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3014 /* This thread must have been killed, because
3015 * it hasn't cleaned itself up. (It's just
3016 * possible that the thread exited before the
3017 * parent thread had a chance to store the
3018 * handle, and now there is another pointer to
3019 * the already-exited thread stored. In this
3020 * case, we'll just get two
3021 * mono_profiler_thread_end() calls for the
3025 mono_threads_unlock ();
3026 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
3027 thread_cleanup (wait->threads[i]);
3029 mono_threads_unlock ();
3034 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
3036 guint32 i, ret, count;
3038 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3040 /* Add the thread state change event, so it wakes up if a thread changes
3041 * to background mode.
3044 if (count < MAXIMUM_WAIT_OBJECTS) {
3045 wait->handles [count] = background_change_event;
3050 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
3053 if(ret==WAIT_FAILED) {
3054 /* See the comment in build_wait_tids() */
3055 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3059 for(i=0; i<wait->num; i++)
3060 CloseHandle (wait->handles[i]);
3062 if (ret == WAIT_TIMEOUT)
3065 if (ret < wait->num) {
3066 gsize tid = wait->threads[ret]->tid;
3067 mono_threads_lock ();
3068 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3069 /* See comment in wait_for_tids about thread cleanup */
3070 mono_threads_unlock ();
3071 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
3072 thread_cleanup (wait->threads [ret]);
3074 mono_threads_unlock ();
3078 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3080 struct wait_data *wait=(struct wait_data *)user;
3082 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
3084 MonoInternalThread *thread=(MonoInternalThread *)value;
3086 /* Ignore background threads, we abort them later */
3087 /* Do not lock here since it is not needed and the caller holds threads_lock */
3088 if (thread->state & ThreadState_Background) {
3089 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3090 return; /* just leave, ignore */
3093 if (mono_gc_is_finalizer_internal_thread (thread)) {
3094 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3098 if (thread == mono_thread_internal_current ()) {
3099 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3103 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3104 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3108 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3109 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3113 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3114 if (handle == NULL) {
3115 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3119 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3120 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3121 wait->handles[wait->num]=handle;
3122 wait->threads[wait->num]=thread;
3125 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3127 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3132 /* Just ignore the rest, we can't do anything with
3139 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3141 struct wait_data *wait=(struct wait_data *)user;
3142 MonoNativeThreadId self = mono_native_thread_id_get ();
3143 MonoInternalThread *thread = (MonoInternalThread *)value;
3146 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3149 /* The finalizer thread is not a background thread */
3150 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3151 && (thread->state & ThreadState_Background) != 0
3152 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3154 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3158 wait->handles[wait->num] = handle;
3159 wait->threads[wait->num] = thread;
3162 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3163 mono_thread_internal_stop (thread);
3167 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3168 && !mono_gc_is_finalizer_internal_thread (thread);
3172 * mono_threads_set_shutting_down:
3174 * Is called by a thread that wants to shut down Mono. If the runtime is already
3175 * shutting down, the calling thread is suspended/stopped, and this function never
3179 mono_threads_set_shutting_down (void)
3181 MonoInternalThread *current_thread = mono_thread_internal_current ();
3183 mono_threads_lock ();
3185 if (shutting_down) {
3186 mono_threads_unlock ();
3188 /* Make sure we're properly suspended/stopped */
3190 LOCK_THREAD (current_thread);
3192 if ((current_thread->state & ThreadState_SuspendRequested) ||
3193 (current_thread->state & ThreadState_AbortRequested) ||
3194 (current_thread->state & ThreadState_StopRequested)) {
3195 UNLOCK_THREAD (current_thread);
3196 mono_thread_execute_interruption ();
3198 current_thread->state |= ThreadState_Stopped;
3199 UNLOCK_THREAD (current_thread);
3202 /*since we're killing the thread, unset the current domain.*/
3203 mono_domain_unset ();
3205 /* Wake up other threads potentially waiting for us */
3206 mono_thread_info_exit ();
3208 shutting_down = TRUE;
3210 /* Not really a background state change, but this will
3211 * interrupt the main thread if it is waiting for all
3212 * the other threads.
3214 SetEvent (background_change_event);
3216 mono_threads_unlock ();
3220 void mono_thread_manage (void)
3222 struct wait_data wait_data;
3223 struct wait_data *wait = &wait_data;
3225 memset (wait, 0, sizeof (struct wait_data));
3226 /* join each thread that's still running */
3227 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3229 mono_threads_lock ();
3231 THREAD_DEBUG (g_message("%s: No threads", __func__));
3232 mono_threads_unlock ();
3235 mono_threads_unlock ();
3238 mono_threads_lock ();
3239 if (shutting_down) {
3240 /* somebody else is shutting down */
3241 mono_threads_unlock ();
3244 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3245 mono_g_hash_table_foreach (threads, print_tids, NULL));
3247 ResetEvent (background_change_event);
3249 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3250 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3251 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3252 mono_threads_unlock ();
3254 /* Something to wait for */
3255 wait_for_tids_or_state_change (wait, INFINITE);
3257 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3258 } while(wait->num>0);
3260 /* Mono is shutting down, so just wait for the end */
3261 if (!mono_runtime_try_shutdown ()) {
3262 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3263 mono_thread_suspend (mono_thread_internal_current ());
3264 mono_thread_execute_interruption ();
3268 * Remove everything but the finalizer thread and self.
3269 * Also abort all the background threads
3272 mono_threads_lock ();
3275 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3276 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3277 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3279 mono_threads_unlock ();
3281 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3283 /* Something to wait for */
3284 wait_for_tids (wait, INFINITE);
3286 } while (wait->num > 0);
3289 * give the subthreads a chance to really quit (this is mainly needed
3290 * to get correct user and system times from getrusage/wait/time(1)).
3291 * This could be removed if we avoid pthread_detach() and use pthread_join().
3293 mono_thread_info_yield ();
3297 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3299 MonoInternalThread *thread = (MonoInternalThread*)value;
3300 struct wait_data *wait = (struct wait_data*)user_data;
3304 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3306 * This needs no locking.
3308 if ((thread->state & ThreadState_Suspended) != 0 ||
3309 (thread->state & ThreadState_Stopped) != 0)
3312 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3313 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3317 wait->handles [wait->num] = handle;
3318 wait->threads [wait->num] = thread;
3324 * mono_thread_suspend_all_other_threads:
3326 * Suspend all managed threads except the finalizer thread and this thread. It is
3327 * not possible to resume them later.
3329 void mono_thread_suspend_all_other_threads (void)
3331 struct wait_data wait_data;
3332 struct wait_data *wait = &wait_data;
3334 MonoNativeThreadId self = mono_native_thread_id_get ();
3335 guint32 eventidx = 0;
3336 gboolean starting, finished;
3338 memset (wait, 0, sizeof (struct wait_data));
3340 * The other threads could be in an arbitrary state at this point, i.e.
3341 * they could be starting up, shutting down etc. This means that there could be
3342 * threads which are not even in the threads hash table yet.
3346 * First we set a barrier which will be checked by all threads before they
3347 * are added to the threads hash table, and they will exit if the flag is set.
3348 * This ensures that no threads could be added to the hash later.
3349 * We will use shutting_down as the barrier for now.
3351 g_assert (shutting_down);
3354 * We make multiple calls to WaitForMultipleObjects since:
3355 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3356 * - some threads could exit without becoming suspended
3361 * Make a copy of the hashtable since we can't do anything with
3362 * threads while threads_mutex is held.
3365 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3366 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3367 mono_threads_lock ();
3368 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3369 mono_threads_unlock ();
3372 /* Get the suspended events that we'll be waiting for */
3373 for (i = 0; i < wait->num; ++i) {
3374 MonoInternalThread *thread = wait->threads [i];
3376 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3377 || mono_gc_is_finalizer_internal_thread (thread)
3378 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3380 //CloseHandle (wait->handles [i]);
3381 wait->threads [i] = NULL; /* ignore this thread in next loop */
3385 LOCK_THREAD (thread);
3387 if ((thread->state & ThreadState_Suspended) != 0 ||
3388 (thread->state & ThreadState_StopRequested) != 0 ||
3389 (thread->state & ThreadState_Stopped) != 0) {
3390 UNLOCK_THREAD (thread);
3391 CloseHandle (wait->handles [i]);
3392 wait->threads [i] = NULL; /* ignore this thread in next loop */
3398 /* Convert abort requests into suspend requests */
3399 if ((thread->state & ThreadState_AbortRequested) != 0)
3400 thread->state &= ~ThreadState_AbortRequested;
3402 thread->state |= ThreadState_SuspendRequested;
3404 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3405 async_suspend_internal (thread, TRUE);
3407 if (eventidx <= 0) {
3409 * If there are threads which are starting up, we wait until they
3410 * are suspended when they try to register in the threads hash.
3411 * This is guaranteed to finish, since the threads which can create new
3412 * threads get suspended after a while.
3413 * FIXME: The finalizer thread can still create new threads.
3415 mono_threads_lock ();
3416 if (threads_starting_up)
3417 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3420 mono_threads_unlock ();
3422 mono_thread_info_sleep (100, NULL);
3430 MonoInternalThread *thread;
3431 MonoStackFrameInfo *frames;
3432 int nframes, max_frames;
3433 int nthreads, max_threads;
3434 MonoInternalThread **threads;
3435 } ThreadDumpUserData;
3437 static gboolean thread_dump_requested;
3439 /* This needs to be async safe */
3441 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3443 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3445 if (ud->nframes < ud->max_frames) {
3446 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3453 /* This needs to be async safe */
3454 static SuspendThreadResult
3455 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3457 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3458 MonoInternalThread *thread = user_data->thread;
3461 /* This no longer works with remote unwinding */
3463 wapi_desc = wapi_current_thread_desc ();
3464 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3469 if (thread == mono_thread_internal_current ())
3470 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3472 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3474 return MonoResumeThread;
3478 int nthreads, max_threads;
3479 MonoInternalThread **threads;
3480 } CollectThreadsUserData;
3483 collect_thread (gpointer key, gpointer value, gpointer user)
3485 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3486 MonoInternalThread *thread = (MonoInternalThread *)value;
3488 if (ud->nthreads < ud->max_threads)
3489 ud->threads [ud->nthreads ++] = thread;
3493 * Collect running threads into the THREADS array.
3494 * THREADS should be an array allocated on the stack.
3497 collect_threads (MonoInternalThread **thread_array, int max_threads)
3499 CollectThreadsUserData ud;
3501 memset (&ud, 0, sizeof (ud));
3502 /* This array contains refs, but its on the stack, so its ok */
3503 ud.threads = thread_array;
3504 ud.max_threads = max_threads;
3506 mono_threads_lock ();
3507 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3508 mono_threads_unlock ();
3514 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3516 GString* text = g_string_new (0);
3518 GError *error = NULL;
3521 ud->thread = thread;
3524 /* Collect frames for the thread */
3525 if (thread == mono_thread_internal_current ()) {
3526 get_thread_dump (mono_thread_info_current (), ud);
3528 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3532 * Do all the non async-safe work outside of get_thread_dump.
3535 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3537 g_string_append_printf (text, "\n\"%s\"", name);
3540 else if (thread->threadpool_thread) {
3541 g_string_append (text, "\n\"<threadpool thread>\"");
3543 g_string_append (text, "\n\"<unnamed thread>\"");
3546 for (i = 0; i < ud->nframes; ++i) {
3547 MonoStackFrameInfo *frame = &ud->frames [i];
3548 MonoMethod *method = NULL;
3550 if (frame->type == FRAME_TYPE_MANAGED)
3551 method = mono_jit_info_get_method (frame->ji);
3554 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3555 g_string_append_printf (text, " %s\n", location);
3558 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3562 fprintf (stdout, "%s", text->str);
3564 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3565 OutputDebugStringA(text->str);
3568 g_string_free (text, TRUE);
3573 mono_threads_perform_thread_dump (void)
3575 ThreadDumpUserData ud;
3576 MonoInternalThread *thread_array [128];
3577 int tindex, nthreads;
3579 if (!thread_dump_requested)
3582 printf ("Full thread dump:\n");
3584 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3585 nthreads = collect_threads (thread_array, 128);
3587 memset (&ud, 0, sizeof (ud));
3588 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3589 ud.max_frames = 256;
3591 for (tindex = 0; tindex < nthreads; ++tindex)
3592 dump_thread (thread_array [tindex], &ud);
3596 thread_dump_requested = FALSE;
3599 /* Obtain the thread dump of all threads */
3601 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3604 ThreadDumpUserData ud;
3605 MonoInternalThread *thread_array [128];
3606 MonoDomain *domain = mono_domain_get ();
3607 MonoDebugSourceLocation *location;
3608 int tindex, nthreads;
3610 mono_error_init (error);
3612 *out_threads = NULL;
3613 *out_stack_frames = NULL;
3615 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3616 nthreads = collect_threads (thread_array, 128);
3618 memset (&ud, 0, sizeof (ud));
3619 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3620 ud.max_frames = 256;
3622 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3625 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3629 for (tindex = 0; tindex < nthreads; ++tindex) {
3630 MonoInternalThread *thread = thread_array [tindex];
3631 MonoArray *thread_frames;
3637 /* Collect frames for the thread */
3638 if (thread == mono_thread_internal_current ()) {
3639 get_thread_dump (mono_thread_info_current (), &ud);
3641 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3644 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3646 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3649 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3651 for (i = 0; i < ud.nframes; ++i) {
3652 MonoStackFrameInfo *frame = &ud.frames [i];
3653 MonoMethod *method = NULL;
3654 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3658 sf->native_offset = frame->native_offset;
3660 if (frame->type == FRAME_TYPE_MANAGED)
3661 method = mono_jit_info_get_method (frame->ji);
3664 sf->method_address = (gsize) frame->ji->code_start;
3666 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3669 MONO_OBJECT_SETREF (sf, method, rm);
3671 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3673 sf->il_offset = location->il_offset;
3675 if (location && location->source_file) {
3676 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3677 sf->line = location->row;
3678 sf->column = location->column;
3680 mono_debug_free_source_location (location);
3685 mono_array_setref (thread_frames, i, sf);
3691 return is_ok (error);
3695 * mono_threads_request_thread_dump:
3697 * Ask all threads except the current to print their stacktrace to stdout.
3700 mono_threads_request_thread_dump (void)
3702 /*The new thread dump code runs out of the finalizer thread. */
3703 thread_dump_requested = TRUE;
3704 mono_gc_finalize_notify ();
3709 gint allocated; /* +1 so that refs [allocated] == NULL */
3713 typedef struct ref_stack RefStack;
3716 ref_stack_new (gint initial_size)
3720 initial_size = MAX (initial_size, 16) + 1;
3721 rs = g_new0 (RefStack, 1);
3722 rs->refs = g_new0 (gpointer, initial_size);
3723 rs->allocated = initial_size;
3728 ref_stack_destroy (gpointer ptr)
3730 RefStack *rs = (RefStack *)ptr;
3739 ref_stack_push (RefStack *rs, gpointer ptr)
3741 g_assert (rs != NULL);
3743 if (rs->bottom >= rs->allocated) {
3744 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3745 rs->allocated <<= 1;
3746 rs->refs [rs->allocated] = NULL;
3748 rs->refs [rs->bottom++] = ptr;
3752 ref_stack_pop (RefStack *rs)
3754 if (rs == NULL || rs->bottom == 0)
3758 rs->refs [rs->bottom] = NULL;
3762 ref_stack_find (RefStack *rs, gpointer ptr)
3769 for (refs = rs->refs; refs && *refs; refs++) {
3777 * mono_thread_push_appdomain_ref:
3779 * Register that the current thread may have references to objects in domain
3780 * @domain on its stack. Each call to this function should be paired with a
3781 * call to pop_appdomain_ref.
3784 mono_thread_push_appdomain_ref (MonoDomain *domain)
3786 MonoInternalThread *thread = mono_thread_internal_current ();
3789 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3790 SPIN_LOCK (thread->lock_thread_id);
3791 if (thread->appdomain_refs == NULL)
3792 thread->appdomain_refs = ref_stack_new (16);
3793 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3794 SPIN_UNLOCK (thread->lock_thread_id);
3799 mono_thread_pop_appdomain_ref (void)
3801 MonoInternalThread *thread = mono_thread_internal_current ();
3804 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3805 SPIN_LOCK (thread->lock_thread_id);
3806 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3807 SPIN_UNLOCK (thread->lock_thread_id);
3812 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3815 SPIN_LOCK (thread->lock_thread_id);
3816 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3817 SPIN_UNLOCK (thread->lock_thread_id);
3822 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3824 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3827 typedef struct abort_appdomain_data {
3828 struct wait_data wait;
3830 } abort_appdomain_data;
3833 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3835 MonoInternalThread *thread = (MonoInternalThread*)value;
3836 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3837 MonoDomain *domain = data->domain;
3839 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3840 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3842 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3843 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3846 data->wait.handles [data->wait.num] = handle;
3847 data->wait.threads [data->wait.num] = thread;
3850 /* Just ignore the rest, we can't do anything with
3858 * mono_threads_abort_appdomain_threads:
3860 * Abort threads which has references to the given appdomain.
3863 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3865 #ifdef __native_client__
3869 abort_appdomain_data user_data;
3871 int orig_timeout = timeout;
3874 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3876 start_time = mono_msec_ticks ();
3878 mono_threads_lock ();
3880 user_data.domain = domain;
3881 user_data.wait.num = 0;
3882 /* This shouldn't take any locks */
3883 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3884 mono_threads_unlock ();
3886 if (user_data.wait.num > 0) {
3887 /* Abort the threads outside the threads lock */
3888 for (i = 0; i < user_data.wait.num; ++i)
3889 mono_thread_internal_abort (user_data.wait.threads [i]);
3892 * We should wait for the threads either to abort, or to leave the
3893 * domain. We can't do the latter, so we wait with a timeout.
3895 wait_for_tids (&user_data.wait, 100);
3898 /* Update remaining time */
3899 timeout -= mono_msec_ticks () - start_time;
3900 start_time = mono_msec_ticks ();
3902 if (orig_timeout != -1 && timeout < 0)
3905 while (user_data.wait.num > 0);
3907 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3913 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3915 MonoInternalThread *thread = (MonoInternalThread*)value;
3916 MonoDomain *domain = (MonoDomain*)user_data;
3919 /* No locking needed here */
3920 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3922 if (thread->cached_culture_info) {
3923 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3924 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3925 if (obj && obj->vtable->domain == domain)
3926 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3932 * mono_threads_clear_cached_culture:
3934 * Clear the cached_current_culture from all threads if it is in the
3938 mono_threads_clear_cached_culture (MonoDomain *domain)
3940 mono_threads_lock ();
3941 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3942 mono_threads_unlock ();
3946 * mono_thread_get_undeniable_exception:
3948 * Return an exception which needs to be raised when leaving a catch clause.
3949 * This is used for undeniable exception propagation.
3952 mono_thread_get_undeniable_exception (void)
3954 MonoInternalThread *thread = mono_thread_internal_current ();
3956 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3958 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3959 * exception if the thread no longer references a dying appdomain.
3961 thread->abort_exc->trace_ips = NULL;
3962 thread->abort_exc->stack_trace = NULL;
3963 return thread->abort_exc;
3969 #if MONO_SMALL_CONFIG
3970 #define NUM_STATIC_DATA_IDX 4
3971 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3975 #define NUM_STATIC_DATA_IDX 8
3976 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3977 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3981 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3982 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3985 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3987 gpointer *static_data = (gpointer *)addr;
3989 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3990 void **ptr = (void **)static_data [i];
3995 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3996 void **p = ptr + idx;
3999 mark_func ((MonoObject**)p, gc_data);
4005 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4007 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4011 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4013 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4017 * mono_alloc_static_data
4019 * Allocate memory blocks for storing threads or context static data
4022 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4024 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4027 gpointer* static_data = *static_data_ptr;
4029 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4030 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4032 if (mono_gc_user_markers_supported ()) {
4033 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4034 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4036 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4037 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4040 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4041 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4042 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4043 *static_data_ptr = static_data;
4044 static_data [0] = static_data;
4047 for (i = 1; i <= idx; ++i) {
4048 if (static_data [i])
4051 if (mono_gc_user_markers_supported ())
4052 static_data [i] = g_malloc0 (static_data_size [i]);
4054 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4055 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4056 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4061 mono_free_static_data (gpointer* static_data)
4064 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4065 gpointer p = static_data [i];
4069 * At this point, the static data pointer array is still registered with the
4070 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4071 * data. Freeing the individual arrays without first nulling their slots
4072 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4073 * such an already freed array. See bug #13813.
4075 static_data [i] = NULL;
4076 mono_memory_write_barrier ();
4077 if (mono_gc_user_markers_supported ())
4080 mono_gc_free_fixed (p);
4082 mono_gc_free_fixed (static_data);
4086 * mono_init_static_data_info
4088 * Initializes static data counters
4090 static void mono_init_static_data_info (StaticDataInfo *static_data)
4092 static_data->idx = 0;
4093 static_data->offset = 0;
4094 static_data->freelist = NULL;
4098 * mono_alloc_static_data_slot
4100 * Generates an offset for static data. static_data contains the counters
4101 * used to generate it.
4104 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4106 if (!static_data->idx && !static_data->offset) {
4108 * we use the first chunk of the first allocation also as
4109 * an array for the rest of the data
4111 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4113 static_data->offset += align - 1;
4114 static_data->offset &= ~(align - 1);
4115 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4116 static_data->idx ++;
4117 g_assert (size <= static_data_size [static_data->idx]);
4118 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4119 static_data->offset = 0;
4121 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4122 static_data->offset += size;
4127 * ensure thread static fields already allocated are valid for thread
4128 * This function is called when a thread is created or on thread attach.
4131 thread_adjust_static_data (MonoInternalThread *thread)
4133 mono_threads_lock ();
4134 if (thread_static_info.offset || thread_static_info.idx > 0) {
4135 /* get the current allocated size */
4136 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4137 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4139 mono_threads_unlock ();
4143 * LOCKING: requires that threads_mutex is held
4146 context_adjust_static_data (MonoAppContext *ctx)
4148 if (context_static_info.offset || context_static_info.idx > 0) {
4149 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4150 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4151 ctx->data->static_data = ctx->static_data;
4156 * LOCKING: requires that threads_mutex is held
4159 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4161 MonoInternalThread *thread = (MonoInternalThread *)value;
4162 guint32 offset = GPOINTER_TO_UINT (user);
4164 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4168 * LOCKING: requires that threads_mutex is held
4171 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4173 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4178 guint32 offset = GPOINTER_TO_UINT (user);
4179 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4180 ctx->data->static_data = ctx->static_data;
4183 static StaticDataFreeList*
4184 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4186 StaticDataFreeList* prev = NULL;
4187 StaticDataFreeList* tmp = static_data->freelist;
4189 if (tmp->size == size) {
4191 prev->next = tmp->next;
4193 static_data->freelist = tmp->next;
4202 #if SIZEOF_VOID_P == 4
4209 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4211 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4213 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4214 MonoBitSet *rb = sets [idx];
4215 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4216 offset /= sizeof (uintptr_t);
4217 /* offset is now the bitmap offset */
4218 for (int i = 0; i < numbits; ++i) {
4219 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4220 mono_bitset_set_fast (rb, offset + i);
4225 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4227 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4228 MonoBitSet *rb = sets [idx];
4229 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4230 offset /= sizeof (uintptr_t);
4231 /* offset is now the bitmap offset */
4232 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4233 mono_bitset_clear_fast (rb, offset + i);
4237 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4239 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4241 StaticDataInfo *info;
4244 if (static_type == SPECIAL_STATIC_THREAD) {
4245 info = &thread_static_info;
4246 sets = thread_reference_bitmaps;
4248 info = &context_static_info;
4249 sets = context_reference_bitmaps;
4252 mono_threads_lock ();
4254 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4258 offset = item->offset;
4261 offset = mono_alloc_static_data_slot (info, size, align);
4264 update_reference_bitmap (sets, offset, bitmap, numbits);
4266 if (static_type == SPECIAL_STATIC_THREAD) {
4267 /* This can be called during startup */
4268 if (threads != NULL)
4269 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4271 if (contexts != NULL)
4272 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4274 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4277 mono_threads_unlock ();
4283 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4285 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4287 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4288 return get_thread_static_data (thread, offset);
4290 return get_context_static_data (thread->current_appcontext, offset);
4295 mono_get_special_static_data (guint32 offset)
4297 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4306 * LOCKING: requires that threads_mutex is held
4309 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4311 MonoInternalThread *thread = (MonoInternalThread *)value;
4312 OffsetSize *data = (OffsetSize *)user;
4313 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4314 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4317 if (!thread->static_data || !thread->static_data [idx])
4319 ptr = ((char*) thread->static_data [idx]) + off;
4320 mono_gc_bzero_atomic (ptr, data->size);
4324 * LOCKING: requires that threads_mutex is held
4327 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4329 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4334 OffsetSize *data = (OffsetSize *)user;
4335 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4336 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4339 if (!ctx->static_data || !ctx->static_data [idx])
4342 ptr = ((char*) ctx->static_data [idx]) + off;
4343 mono_gc_bzero_atomic (ptr, data->size);
4347 do_free_special_slot (guint32 offset, guint32 size)
4349 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4351 StaticDataInfo *info;
4353 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4354 info = &thread_static_info;
4355 sets = thread_reference_bitmaps;
4357 info = &context_static_info;
4358 sets = context_reference_bitmaps;
4361 guint32 data_offset = offset;
4362 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4363 OffsetSize data = { data_offset, size };
4365 clear_reference_bitmap (sets, data.offset, data.size);
4367 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4368 if (threads != NULL)
4369 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4371 if (contexts != NULL)
4372 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4375 if (!mono_runtime_is_shutting_down ()) {
4376 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4378 item->offset = offset;
4381 item->next = info->freelist;
4382 info->freelist = item;
4387 do_free_special (gpointer key, gpointer value, gpointer data)
4389 MonoClassField *field = (MonoClassField *)key;
4390 guint32 offset = GPOINTER_TO_UINT (value);
4393 size = mono_type_size (field->type, &align);
4394 do_free_special_slot (offset, size);
4398 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4400 mono_threads_lock ();
4402 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4404 mono_threads_unlock ();
4408 static void CALLBACK dummy_apc (ULONG_PTR param)
4414 * mono_thread_execute_interruption
4416 * Performs the operation that the requested thread state requires (abort,
4419 static MonoException*
4420 mono_thread_execute_interruption (void)
4422 MonoInternalThread *thread = mono_thread_internal_current ();
4423 MonoThread *sys_thread = mono_thread_current ();
4425 LOCK_THREAD (thread);
4427 /* MonoThread::interruption_requested can only be changed with atomics */
4428 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4429 /* this will consume pending APC calls */
4431 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4433 InterlockedDecrement (&thread_interruption_requested);
4435 /* Clear the interrupted flag of the thread so it can wait again */
4436 mono_thread_info_clear_self_interrupt ();
4439 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4440 if (sys_thread->pending_exception) {
4443 exc = sys_thread->pending_exception;
4444 sys_thread->pending_exception = NULL;
4446 UNLOCK_THREAD (thread);
4448 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4449 UNLOCK_THREAD (thread);
4450 g_assert (sys_thread->pending_exception == NULL);
4451 if (thread->abort_exc == NULL) {
4453 * This might be racy, but it has to be called outside the lock
4454 * since it calls managed code.
4456 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4458 return thread->abort_exc;
4460 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4461 /* calls UNLOCK_THREAD (thread) */
4462 self_suspend_internal ();
4465 else if ((thread->state & ThreadState_StopRequested) != 0) {
4466 /* FIXME: do this through the JIT? */
4468 UNLOCK_THREAD (thread);
4470 mono_thread_exit ();
4472 } else if (thread->thread_interrupt_requested) {
4474 thread->thread_interrupt_requested = FALSE;
4475 UNLOCK_THREAD (thread);
4477 return(mono_get_exception_thread_interrupted ());
4480 UNLOCK_THREAD (thread);
4486 * mono_thread_request_interruption
4488 * A signal handler can call this method to request the interruption of a
4489 * thread. The result of the interruption will depend on the current state of
4490 * the thread. If the result is an exception that needs to be throw, it is
4491 * provided as return value.
4494 mono_thread_request_interruption (gboolean running_managed)
4496 MonoInternalThread *thread = mono_thread_internal_current ();
4498 /* The thread may already be stopping */
4503 if (thread->interrupt_on_stop &&
4504 thread->state & ThreadState_StopRequested &&
4505 thread->state & ThreadState_Background)
4509 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4511 InterlockedIncrement (&thread_interruption_requested);
4513 if (!running_managed || is_running_protected_wrapper ()) {
4514 /* Can't stop while in unmanaged code. Increase the global interruption
4515 request count. When exiting the unmanaged method the count will be
4516 checked and the thread will be interrupted. */
4518 /* this will awake the thread if it is in WaitForSingleObject
4520 /* Our implementation of this function ignores the func argument */
4522 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4524 mono_thread_info_self_interrupt ();
4529 return mono_thread_execute_interruption ();
4533 /*This function should be called by a thread after it has exited all of
4534 * its handle blocks at interruption time.*/
4536 mono_thread_resume_interruption (void)
4538 MonoInternalThread *thread = mono_thread_internal_current ();
4539 gboolean still_aborting;
4541 /* The thread may already be stopping */
4545 LOCK_THREAD (thread);
4546 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4547 UNLOCK_THREAD (thread);
4549 /*This can happen if the protected block called Thread::ResetAbort*/
4550 if (!still_aborting)
4553 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4555 InterlockedIncrement (&thread_interruption_requested);
4557 mono_thread_info_self_interrupt ();
4559 return mono_thread_execute_interruption ();
4562 gboolean mono_thread_interruption_requested ()
4564 if (thread_interruption_requested) {
4565 MonoInternalThread *thread = mono_thread_internal_current ();
4566 /* The thread may already be stopping */
4568 return (thread->interruption_requested);
4573 static MonoException*
4574 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4576 MonoInternalThread *thread = mono_thread_internal_current ();
4578 /* The thread may already be stopping */
4582 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4583 MonoException* exc = mono_thread_execute_interruption ();
4591 * Performs the interruption of the current thread, if one has been requested,
4592 * and the thread is not running a protected wrapper.
4593 * Return the exception which needs to be thrown, if any.
4596 mono_thread_interruption_checkpoint (void)
4598 return mono_thread_interruption_checkpoint_request (FALSE);
4602 * Performs the interruption of the current thread, if one has been requested.
4603 * Return the exception which needs to be thrown, if any.
4606 mono_thread_force_interruption_checkpoint_noraise (void)
4608 return mono_thread_interruption_checkpoint_request (TRUE);
4612 * mono_set_pending_exception:
4614 * Set the pending exception of the current thread to EXC.
4615 * The exception will be thrown when execution returns to managed code.
4618 mono_set_pending_exception (MonoException *exc)
4620 MonoThread *thread = mono_thread_current ();
4622 /* The thread may already be stopping */
4626 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4628 mono_thread_request_interruption (FALSE);
4632 * mono_thread_interruption_request_flag:
4634 * Returns the address of a flag that will be non-zero if an interruption has
4635 * been requested for a thread. The thread to interrupt may not be the current
4636 * thread, so an additional call to mono_thread_interruption_requested() or
4637 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4640 gint32* mono_thread_interruption_request_flag ()
4642 return &thread_interruption_requested;
4646 mono_thread_init_apartment_state (void)
4649 MonoInternalThread* thread = mono_thread_internal_current ();
4651 /* Positive return value indicates success, either
4652 * S_OK if this is first CoInitialize call, or
4653 * S_FALSE if CoInitialize already called, but with same
4654 * threading model. A negative value indicates failure,
4655 * probably due to trying to change the threading model.
4657 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4658 ? COINIT_APARTMENTTHREADED
4659 : COINIT_MULTITHREADED) < 0) {
4660 thread->apartment_state = ThreadApartmentState_Unknown;
4666 mono_thread_cleanup_apartment_state (void)
4669 MonoInternalThread* thread = mono_thread_internal_current ();
4671 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4678 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4680 LOCK_THREAD (thread);
4681 thread->state |= state;
4682 UNLOCK_THREAD (thread);
4686 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4688 LOCK_THREAD (thread);
4689 thread->state &= ~state;
4690 UNLOCK_THREAD (thread);
4694 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4696 gboolean ret = FALSE;
4698 LOCK_THREAD (thread);
4700 if ((thread->state & test) != 0) {
4704 UNLOCK_THREAD (thread);
4709 static gboolean has_tls_get = FALSE;
4712 mono_runtime_set_has_tls_get (gboolean val)
4718 mono_runtime_has_tls_get (void)
4724 self_interrupt_thread (void *_unused)
4726 MonoThreadInfo *info = mono_thread_info_current ();
4727 MonoException *exc = mono_thread_execute_interruption ();
4728 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4729 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. */
4730 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4734 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4738 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4742 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4744 MonoJitInfo **dest = (MonoJitInfo **)data;
4750 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4752 MonoJitInfo *ji = NULL;
4757 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4758 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4759 * where we hold runtime locks.
4761 if (!mono_threads_is_coop_enabled ())
4762 mono_thread_info_set_is_async_context (TRUE);
4763 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4764 if (!mono_threads_is_coop_enabled ())
4765 mono_thread_info_set_is_async_context (FALSE);
4770 MonoInternalThread *thread;
4771 gboolean install_async_abort;
4772 MonoThreadInfoInterruptToken *interrupt_token;
4775 static SuspendThreadResult
4776 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4778 AbortThreadData *data = (AbortThreadData *)ud;
4779 MonoInternalThread *thread = data->thread;
4780 MonoJitInfo *ji = NULL;
4781 gboolean protected_wrapper;
4782 gboolean running_managed;
4784 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4785 return MonoResumeThread;
4787 /*someone is already interrupting it*/
4788 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4789 return MonoResumeThread;
4791 InterlockedIncrement (&thread_interruption_requested);
4793 ji = mono_thread_info_get_last_managed (info);
4794 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4795 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4797 if (!protected_wrapper && running_managed) {
4798 /*We are in managed code*/
4799 /*Set the thread to call */
4800 if (data->install_async_abort)
4801 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4802 return MonoResumeThread;
4805 * This will cause waits to be broken.
4806 * It will also prevent the thread from entering a wait, so if the thread returns
4807 * from the wait before it receives the abort signal, it will just spin in the wait
4808 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4811 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4813 return MonoResumeThread;
4818 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4820 AbortThreadData data;
4822 g_assert (thread != mono_thread_internal_current ());
4824 data.thread = thread;
4825 data.install_async_abort = install_async_abort;
4826 data.interrupt_token = NULL;
4828 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4829 if (data.interrupt_token)
4830 mono_thread_info_finish_interrupt (data.interrupt_token);
4831 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4835 self_abort_internal (MonoError *error)
4839 mono_error_init (error);
4841 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4842 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4844 exc = mono_thread_request_interruption (TRUE);
4846 mono_error_set_exception_instance (error, exc);
4848 mono_thread_info_self_interrupt ();
4852 MonoInternalThread *thread;
4854 MonoThreadInfoInterruptToken *interrupt_token;
4855 } SuspendThreadData;
4857 static SuspendThreadResult
4858 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4860 SuspendThreadData *data = (SuspendThreadData *)ud;
4861 MonoInternalThread *thread = data->thread;
4862 MonoJitInfo *ji = NULL;
4863 gboolean protected_wrapper;
4864 gboolean running_managed;
4866 ji = mono_thread_info_get_last_managed (info);
4867 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4868 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4870 if (running_managed && !protected_wrapper) {
4871 thread->state &= ~ThreadState_SuspendRequested;
4872 thread->state |= ThreadState_Suspended;
4873 return KeepSuspended;
4875 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4876 InterlockedIncrement (&thread_interruption_requested);
4877 if (data->interrupt)
4878 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4880 return MonoResumeThread;
4884 /* LOCKING: called with @thread synch_cs held, and releases it */
4886 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4888 SuspendThreadData data;
4890 g_assert (thread != mono_thread_internal_current ());
4892 data.thread = thread;
4893 data.interrupt = interrupt;
4894 data.interrupt_token = NULL;
4896 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4897 if (data.interrupt_token)
4898 mono_thread_info_finish_interrupt (data.interrupt_token);
4900 UNLOCK_THREAD (thread);
4903 /* LOCKING: called with @thread synch_cs held, and releases it */
4905 self_suspend_internal (void)
4907 MonoInternalThread *thread;
4909 thread = mono_thread_internal_current ();
4911 mono_thread_info_begin_self_suspend ();
4912 thread->state &= ~ThreadState_SuspendRequested;
4913 thread->state |= ThreadState_Suspended;
4915 UNLOCK_THREAD (thread);
4917 mono_thread_info_end_self_suspend ();
4921 * mono_thread_is_foreign:
4922 * @thread: the thread to query
4924 * This function allows one to determine if a thread was created by the mono runtime and has
4925 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4927 * Returns: TRUE if @thread was not created by the runtime.
4930 mono_thread_is_foreign (MonoThread *thread)
4932 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4933 return info->runtime_thread == FALSE;
4937 * mono_add_joinable_thread:
4939 * Add TID to the list of joinable threads.
4940 * LOCKING: Acquires the threads lock.
4943 mono_threads_add_joinable_thread (gpointer tid)
4947 * We cannot detach from threads because it causes problems like
4948 * 2fd16f60/r114307. So we collect them and join them when
4949 * we have time (in he finalizer thread).
4951 joinable_threads_lock ();
4952 if (!joinable_threads)
4953 joinable_threads = g_hash_table_new (NULL, NULL);
4954 g_hash_table_insert (joinable_threads, tid, tid);
4955 joinable_thread_count ++;
4956 joinable_threads_unlock ();
4958 mono_gc_finalize_notify ();
4963 * mono_threads_join_threads:
4965 * Join all joinable threads. This is called from the finalizer thread.
4966 * LOCKING: Acquires the threads lock.
4969 mono_threads_join_threads (void)
4972 GHashTableIter iter;
4979 if (!joinable_thread_count)
4983 joinable_threads_lock ();
4985 if (g_hash_table_size (joinable_threads)) {
4986 g_hash_table_iter_init (&iter, joinable_threads);
4987 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4988 thread = (pthread_t)tid;
4989 g_hash_table_remove (joinable_threads, key);
4990 joinable_thread_count --;
4993 joinable_threads_unlock ();
4995 if (thread != pthread_self ())
4996 /* This shouldn't block */
4997 pthread_join (thread, NULL);
5008 * Wait for thread TID to exit.
5009 * LOCKING: Acquires the threads lock.
5012 mono_thread_join (gpointer tid)
5016 gboolean found = FALSE;
5018 joinable_threads_lock ();
5019 if (!joinable_threads)
5020 joinable_threads = g_hash_table_new (NULL, NULL);
5021 if (g_hash_table_lookup (joinable_threads, tid)) {
5022 g_hash_table_remove (joinable_threads, tid);
5023 joinable_thread_count --;
5026 joinable_threads_unlock ();
5029 thread = (pthread_t)tid;
5030 pthread_join (thread, NULL);
5035 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5037 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5038 mono_thread_interruption_checkpoint ();
5041 static inline gboolean
5042 is_appdomainunloaded_exception (MonoClass *klass)
5044 return klass == mono_class_get_appdomain_unloaded_exception_class ();
5047 static inline gboolean
5048 is_threadabort_exception (MonoClass *klass)
5050 return klass == mono_defaults.threadabortexception_class;
5054 mono_thread_internal_unhandled_exception (MonoObject* exc)
5056 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5057 MonoClass *klass = exc->vtable->klass;
5058 if (is_threadabort_exception (klass)) {
5059 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5060 } else if (!is_appdomainunloaded_exception (klass)) {
5061 mono_unhandled_exception (exc);
5062 if (mono_environment_exitcode_get () == 1)
5069 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5072 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5073 mono_error_set_pending_exception (&error);
5077 * mono_threads_attach_coop: called by native->managed wrappers
5081 * - @return: the original domain which needs to be restored, or NULL.
5084 * - @dummy: contains the original domain
5085 * - @return: a cookie containing current MonoThreadInfo*.
5088 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5091 gboolean fresh_thread;
5094 /* Happens when called from AOTed code which is only used in the root domain. */
5095 domain = mono_get_root_domain ();
5100 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5101 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5102 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5103 * we're only responsible for making the cookie. */
5104 if (mono_threads_is_coop_enabled ()) {
5105 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5106 fresh_thread = !info || !mono_thread_info_is_live (info);
5109 if (!mono_thread_internal_current ()) {
5110 mono_thread_attach_full (domain, FALSE);
5113 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5116 orig = mono_domain_get ();
5118 mono_domain_set (domain, TRUE);
5120 if (!mono_threads_is_coop_enabled ())
5121 return orig != domain ? orig : NULL;
5125 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5126 * return the right cookie. */
5127 return mono_threads_enter_gc_unsafe_region_cookie (mono_thread_info_current ());
5130 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5131 return mono_threads_enter_gc_unsafe_region (dummy);
5136 * mono_threads_detach_coop: called by native->managed wrappers
5139 * - @cookie: the original domain which needs to be restored, or NULL.
5143 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5144 * - @dummy: contains the original domain
5147 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5149 MonoDomain *domain, *orig;
5151 if (!mono_threads_is_coop_enabled ()) {
5152 orig = (MonoDomain*) cookie;
5154 mono_domain_set (orig, TRUE);
5156 orig = (MonoDomain*) *dummy;
5158 domain = mono_domain_get ();
5161 /* it won't do anything if cookie is NULL
5162 * thread state RUNNING -> (RUNNING|BLOCKING) */
5163 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5165 if (orig != domain) {
5167 mono_domain_unset ();
5169 mono_domain_set (orig, TRUE);