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>
45 #include <mono/metadata/gc-internals.h>
46 #include <mono/metadata/reflection-internals.h>
52 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
53 #define USE_TKILL_ON_ANDROID 1
56 #ifdef PLATFORM_ANDROID
59 #ifdef USE_TKILL_ON_ANDROID
60 extern int tkill (pid_t tid, int signal);
64 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_DEBUG(a)
66 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
67 #define THREAD_WAIT_DEBUG(a)
68 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
69 #define LIBGC_DEBUG(a)
71 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
72 #define SPIN_LOCK(i) do { \
73 if (SPIN_TRYLOCK (i)) \
77 #define SPIN_UNLOCK(i) i = 0
79 #define LOCK_THREAD(thread) lock_thread((thread))
80 #define UNLOCK_THREAD(thread) unlock_thread((thread))
82 /* Provide this for systems with glib < 2.6 */
83 #ifndef G_GSIZE_FORMAT
84 # if GLIB_SIZEOF_LONG == 8
85 # define G_GSIZE_FORMAT "lu"
87 # define G_GSIZE_FORMAT "u"
93 guint32 (*func)(void *);
109 typedef struct _StaticDataFreeList StaticDataFreeList;
110 struct _StaticDataFreeList {
111 StaticDataFreeList *next;
119 StaticDataFreeList *freelist;
122 /* Number of cached culture objects in the MonoThread->cached_culture_info array
123 * (per-type): we use the first NUM entries for CultureInfo and the last for
124 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
126 #define NUM_CACHED_CULTURES 4
127 #define CULTURES_START_IDX 0
128 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
130 /* Controls access to the 'threads' hash table */
131 static void mono_threads_lock (void);
132 static void mono_threads_unlock (void);
133 static MonoCoopMutex threads_mutex;
135 /* Controls access to the 'joinable_threads' hash table */
136 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
137 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
138 static mono_mutex_t joinable_threads_mutex;
140 /* Holds current status of static data heap */
141 static StaticDataInfo thread_static_info;
142 static StaticDataInfo context_static_info;
144 /* The hash of existing threads (key is thread ID, value is
145 * MonoInternalThread*) that need joining before exit
147 static MonoGHashTable *threads=NULL;
149 /* List of app context GC handles.
150 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
152 static GHashTable *contexts = NULL;
154 /* Cleanup queue for contexts. */
155 static MonoReferenceQueue *context_queue;
158 * Threads which are starting up and they are not in the 'threads' hash yet.
159 * When handle_store is called for a thread, it will be removed from this hash table.
160 * Protected by mono_threads_lock ().
162 static MonoGHashTable *threads_starting_up = NULL;
164 /* The TLS key that holds the MonoObject assigned to each thread */
165 static MonoNativeTlsKey current_object_key;
168 /* Protected by the threads lock */
169 static GHashTable *joinable_threads;
170 static int joinable_thread_count;
172 #ifdef MONO_HAVE_FAST_TLS
173 /* we need to use both the Tls* functions and __thread because
174 * the gc needs to see all the threads
176 MONO_FAST_TLS_DECLARE(tls_current_object);
177 #define SET_CURRENT_OBJECT(x) do { \
178 MONO_FAST_TLS_SET (tls_current_object, x); \
179 mono_native_tls_set_value (current_object_key, x); \
181 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
183 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
184 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
187 /* function called at thread start */
188 static MonoThreadStartCB mono_thread_start_cb = NULL;
190 /* function called at thread attach */
191 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
193 /* function called at thread cleanup */
194 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
196 /* The default stack size for each thread */
197 static guint32 default_stacksize = 0;
198 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
200 static void thread_adjust_static_data (MonoInternalThread *thread);
201 static void context_adjust_static_data (MonoAppContext *ctx);
202 static void mono_free_static_data (gpointer* static_data);
203 static void mono_init_static_data_info (StaticDataInfo *static_data);
204 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
205 static gboolean mono_thread_resume (MonoInternalThread* thread);
206 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
207 static void self_abort_internal (void);
208 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
209 static void self_suspend_internal (void);
211 static MonoException* mono_thread_execute_interruption (void);
212 static void ref_stack_destroy (gpointer rs);
214 /* Spin lock for InterlockedXXX 64 bit functions */
215 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
216 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
217 static mono_mutex_t interlocked_mutex;
219 /* global count of thread interruptions requested */
220 static gint32 thread_interruption_requested = 0;
222 /* Event signaled when a thread changes its background mode */
223 static HANDLE background_change_event;
225 static gboolean shutting_down = FALSE;
227 static gint32 managed_thread_id_counter = 0;
229 /* Class lazy loading functions */
230 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
233 mono_threads_lock (void)
235 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
239 mono_threads_unlock (void)
241 mono_locks_coop_release (&threads_mutex, ThreadsLock);
246 get_next_managed_thread_id (void)
248 return InterlockedIncrement (&managed_thread_id_counter);
252 mono_thread_get_tls_key (void)
254 return current_object_key;
258 mono_thread_get_tls_offset (void)
261 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
265 static inline MonoNativeThreadId
266 thread_get_tid (MonoInternalThread *thread)
268 /* We store the tid as a guint64 to keep the object layout constant between platforms */
269 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
272 /* handle_store() and handle_remove() manage the array of threads that
273 * still need to be waited for when the main thread exits.
275 * If handle_store() returns FALSE the thread must not be started
276 * because Mono is shutting down.
278 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
280 mono_threads_lock ();
282 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
284 if (threads_starting_up)
285 mono_g_hash_table_remove (threads_starting_up, thread);
287 if (shutting_down && !force_attach) {
288 mono_threads_unlock ();
293 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
294 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
297 /* We don't need to duplicate thread->handle, because it is
298 * only closed when the thread object is finalized by the GC.
300 g_assert (thread->internal_thread);
301 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
302 thread->internal_thread);
304 mono_threads_unlock ();
309 static gboolean handle_remove(MonoInternalThread *thread)
312 gsize tid = thread->tid;
314 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
316 mono_threads_lock ();
319 /* We have to check whether the thread object for the
320 * tid is still the same in the table because the
321 * thread might have been destroyed and the tid reused
322 * in the meantime, in which case the tid would be in
323 * the table, but with another thread object.
325 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
326 mono_g_hash_table_remove (threads, (gpointer)tid);
335 mono_threads_unlock ();
337 /* Don't close the handle here, wait for the object finalizer
338 * to do it. Otherwise, the following race condition applies:
340 * 1) Thread exits (and handle_remove() closes the handle)
342 * 2) Some other handle is reassigned the same slot
344 * 3) Another thread tries to join the first thread, and
345 * blocks waiting for the reassigned handle to be signalled
346 * (which might never happen). This is possible, because the
347 * thread calling Join() still has a reference to the first
353 static void ensure_synch_cs_set (MonoInternalThread *thread)
355 MonoCoopMutex *synch_cs;
357 if (thread->synch_cs != NULL) {
361 synch_cs = g_new0 (MonoCoopMutex, 1);
362 mono_coop_mutex_init_recursive (synch_cs);
364 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
365 synch_cs, NULL) != NULL) {
366 /* Another thread must have installed this CS */
367 mono_coop_mutex_destroy (synch_cs);
373 lock_thread (MonoInternalThread *thread)
375 if (!thread->synch_cs)
376 ensure_synch_cs_set (thread);
378 g_assert (thread->synch_cs);
380 mono_coop_mutex_lock (thread->synch_cs);
384 unlock_thread (MonoInternalThread *thread)
386 mono_coop_mutex_unlock (thread->synch_cs);
390 * NOTE: this function can be called also for threads different from the current one:
391 * make sure no code called from it will ever assume it is run on the thread that is
392 * getting cleaned up.
394 static void thread_cleanup (MonoInternalThread *thread)
396 g_assert (thread != NULL);
398 if (thread->abort_state_handle) {
399 mono_gchandle_free (thread->abort_state_handle);
400 thread->abort_state_handle = 0;
402 thread->abort_exc = NULL;
403 thread->current_appcontext = NULL;
406 * This is necessary because otherwise we might have
407 * cross-domain references which will not get cleaned up when
408 * the target domain is unloaded.
410 if (thread->cached_culture_info) {
412 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
413 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
417 * thread->synch_cs can be NULL if this was called after
418 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
419 * This can happen only during shutdown.
420 * The shutting_down flag is not always set, so we can't assert on it.
422 if (thread->synch_cs)
423 LOCK_THREAD (thread);
425 thread->state |= ThreadState_Stopped;
426 thread->state &= ~ThreadState_Background;
428 if (thread->synch_cs)
429 UNLOCK_THREAD (thread);
432 An interruption request has leaked to cleanup. Adjust the global counter.
434 This can happen is the abort source thread finds the abortee (this) thread
435 in unmanaged code. If this thread never trips back to managed code or check
436 the local flag it will be left set and positively unbalance the global counter.
438 Leaving the counter unbalanced will cause a performance degradation since all threads
439 will now keep checking their local flags all the time.
441 if (InterlockedExchange (&thread->interruption_requested, 0))
442 InterlockedDecrement (&thread_interruption_requested);
444 /* if the thread is not in the hash it has been removed already */
445 if (!handle_remove (thread)) {
446 if (thread == mono_thread_internal_current ()) {
447 mono_domain_unset ();
448 mono_memory_barrier ();
450 /* This needs to be called even if handle_remove () fails */
451 if (mono_thread_cleanup_fn)
452 mono_thread_cleanup_fn (thread_get_tid (thread));
455 mono_release_type_locks (thread);
457 /* Can happen when we attach the profiler helper thread in order to heapshot. */
458 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
459 mono_profiler_thread_end (thread->tid);
461 if (thread == mono_thread_internal_current ()) {
463 * This will signal async signal handlers that the thread has exited.
464 * The profiler callback needs this to be set, so it cannot be done earlier.
466 mono_domain_unset ();
467 mono_memory_barrier ();
470 if (thread == mono_thread_internal_current ())
471 mono_thread_pop_appdomain_ref ();
473 thread->cached_culture_info = NULL;
475 mono_free_static_data (thread->static_data);
476 thread->static_data = NULL;
477 ref_stack_destroy (thread->appdomain_refs);
478 thread->appdomain_refs = NULL;
480 if (mono_thread_cleanup_fn)
481 mono_thread_cleanup_fn (thread_get_tid (thread));
483 if (mono_gc_is_moving ()) {
484 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
485 thread->thread_pinning_ref = NULL;
491 * A special static data offset (guint32) consists of 3 parts:
493 * [0] 6-bit index into the array of chunks.
494 * [6] 25-bit offset into the array.
495 * [31] Bit indicating thread or context static.
500 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
511 } SpecialStaticOffset;
513 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
514 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
516 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
517 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
518 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
519 (((SpecialStaticOffset *) &(x))->fields.f)
522 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
524 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
526 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
527 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
529 return ((char *) thread->static_data [idx]) + off;
533 get_context_static_data (MonoAppContext *ctx, guint32 offset)
535 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
537 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
538 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
540 return ((char *) ctx->static_data [idx]) + off;
544 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
546 static MonoClassField *current_thread_field = NULL;
550 if (!current_thread_field) {
551 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
552 g_assert (current_thread_field);
555 mono_class_vtable (domain, mono_defaults.thread_class);
556 mono_domain_lock (domain);
557 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
558 mono_domain_unlock (domain);
561 return (MonoThread **)get_thread_static_data (thread, offset);
565 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
567 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
569 g_assert (current->obj.vtable->domain == domain);
571 g_assert (!*current_thread_ptr);
572 *current_thread_ptr = current;
576 create_thread_object (MonoDomain *domain, MonoError *error)
578 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
579 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
584 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
588 thread = create_thread_object (domain, error);
589 if (!mono_error_ok (error))
592 MONO_OBJECT_SETREF (thread, internal_thread, internal);
597 static MonoInternalThread*
598 create_internal_thread (MonoError *error)
600 MonoInternalThread *thread;
603 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
604 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
605 if (!mono_error_ok (error))
608 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
609 mono_coop_mutex_init_recursive (thread->synch_cs);
611 thread->apartment_state = ThreadApartmentState_Unknown;
612 thread->managed_id = get_next_managed_thread_id ();
613 if (mono_gc_is_moving ()) {
614 thread->thread_pinning_ref = thread;
615 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
622 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate, MonoError *error)
624 MonoDomain *domain = mono_get_root_domain ();
626 mono_error_init (error);
627 if (!candidate || candidate->obj.vtable->domain != domain) {
628 candidate = new_thread_with_internal (domain, thread, error);
629 return_val_if_nok (error, FALSE);
631 set_current_thread_for_domain (domain, thread, candidate);
632 g_assert (!thread->root_domain_thread);
633 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
637 static guint32 WINAPI start_wrapper_internal(void *data)
640 MonoThreadInfo *info;
641 StartInfo *start_info = (StartInfo *)data;
642 guint32 (*start_func)(void *);
646 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
649 MonoInternalThread *internal = start_info->obj->internal_thread;
650 MonoObject *start_delegate = start_info->delegate;
651 MonoDomain *domain = start_info->obj->obj.vtable->domain;
653 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
655 /* We can be sure start_info->obj->tid and
656 * start_info->obj->handle have been set, because the thread
657 * was created suspended, and these values were set before the
661 info = mono_thread_info_current ();
663 internal->thread_info = info;
664 internal->small_id = info->small_id;
668 SET_CURRENT_OBJECT (internal);
670 /* Every thread references the appdomain which created it */
671 mono_thread_push_appdomain_ref (domain);
673 if (!mono_domain_set (domain, FALSE)) {
674 /* No point in raising an appdomain_unloaded exception here */
675 /* FIXME: Cleanup here */
676 mono_thread_pop_appdomain_ref ();
680 start_func = start_info->func;
681 start_arg = start_info->obj->start_obj;
683 start_arg = start_info->start_arg;
685 /* We have to do this here because mono_thread_new_init()
686 requires that root_domain_thread is set up. */
687 thread_adjust_static_data (internal);
688 init_root_domain_thread (internal, start_info->obj, &error);
689 mono_error_raise_exception (&error); /* FIXME don't raise here */
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 && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
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_thread_info_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
736 /* start_func is set only for unmanaged start functions */
738 start_func (start_arg);
741 g_assert (start_delegate != NULL);
742 args [0] = start_arg;
743 /* we may want to handle the exception here. See comment below on unhandled exceptions */
744 mono_runtime_delegate_invoke (start_delegate, args, NULL);
747 /* If the thread calls ExitThread at all, this remaining code
748 * will not be executed, but the main thread will eventually
749 * call thread_cleanup() on this thread's behalf.
752 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
754 /* Do any cleanup needed for apartment state. This
755 * cannot be done in thread_cleanup since thread_cleanup could be
756 * called for a thread other than the current thread.
757 * mono_thread_cleanup_apartment_state cleans up apartment
758 * for the current thead */
759 mono_thread_cleanup_apartment_state ();
761 thread_cleanup (internal);
765 /* Remove the reference to the thread object in the TLS data,
766 * so the thread object can be finalized. This won't be
767 * reached if the thread threw an uncaught exception, so those
768 * thread handles will stay referenced :-( (This is due to
769 * missing support for scanning thread-specific data in the
770 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
773 SET_CURRENT_OBJECT (NULL);
778 static guint32 WINAPI start_wrapper(void *data)
782 /* Avoid scanning the frames above this frame during a GC */
783 mono_gc_set_stack_end ((void*)&dummy);
785 return start_wrapper_internal (data);
791 * Common thread creation code.
792 * LOCKING: Acquires the threads lock.
795 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
798 HANDLE thread_handle;
799 MonoNativeThreadId tid;
800 guint32 create_flags;
803 * Join joinable threads to prevent running out of threads since the finalizer
804 * thread might be blocked/backlogged.
806 mono_threads_join_threads ();
808 mono_error_init (error);
810 mono_threads_lock ();
813 mono_threads_unlock ();
816 if (threads_starting_up == NULL) {
817 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
818 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
820 mono_g_hash_table_insert (threads_starting_up, thread, thread);
821 mono_threads_unlock ();
823 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
824 if (!internal->start_notify) {
825 mono_threads_lock ();
826 mono_g_hash_table_remove (threads_starting_up, thread);
827 mono_threads_unlock ();
828 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
834 stack_size = default_stacksize_for_thread (internal);
836 /* Create suspended, so we can do some housekeeping before the thread
839 create_flags = CREATE_SUSPENDED;
841 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
842 stack_size, create_flags, &tid);
844 if (thread_handle == NULL) {
845 /* The thread couldn't be created, so set an exception */
846 mono_threads_lock ();
847 mono_g_hash_table_remove (threads_starting_up, thread);
848 mono_threads_unlock ();
850 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
853 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
855 internal->handle = thread_handle;
856 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
858 internal->threadpool_thread = threadpool_thread;
859 if (threadpool_thread)
860 mono_thread_set_state (internal, ThreadState_Background);
862 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
864 /* Only store the handle when the thread is about to be
865 * launched, to avoid the main thread deadlocking while trying
866 * to clean up a thread that will never be signalled.
868 if (!handle_store (thread, FALSE))
871 mono_thread_info_resume (tid);
873 if (internal->start_notify) {
875 * Wait for the thread to set up its TLS data etc, so
876 * theres no potential race condition if someone tries
877 * to look up the data believing the thread has
880 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));
882 MONO_PREPARE_BLOCKING;
883 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
884 MONO_FINISH_BLOCKING;
886 CloseHandle (internal->start_notify);
887 internal->start_notify = NULL;
890 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));
895 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
897 if (mono_thread_start_cb) {
898 mono_thread_start_cb (tid, stack_start, func);
902 void mono_threads_set_default_stacksize (guint32 stacksize)
904 default_stacksize = stacksize;
907 guint32 mono_threads_get_default_stacksize (void)
909 return default_stacksize;
913 * mono_thread_create_internal:
915 * ARG should not be a GC reference.
918 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
922 MonoInternalThread *internal;
923 StartInfo *start_info;
926 thread = create_thread_object (domain, &error);
927 mono_error_raise_exception (&error); /* FIXME don't raise here */
929 internal = create_internal_thread (&error);
930 mono_error_raise_exception (&error); /* FIXME don't raise here */
932 MONO_OBJECT_SETREF (thread, internal_thread, internal);
934 start_info = g_new0 (StartInfo, 1);
935 start_info->func = (guint32 (*)(void *))func;
936 start_info->obj = thread;
937 start_info->start_arg = arg;
939 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, &error);
941 mono_error_raise_exception (&error); /* FIXME don't raise here */
945 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
946 #ifndef MONO_CROSS_COMPILE
947 if (mono_check_corlib_version () == NULL)
948 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
955 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
957 mono_thread_create_internal (domain, func, arg, FALSE, 0);
961 mono_thread_attach (MonoDomain *domain)
964 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
965 mono_error_raise_exception (&error);
971 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
973 MonoThreadInfo *info;
974 MonoInternalThread *thread;
975 MonoThread *current_thread;
976 HANDLE thread_handle;
977 MonoNativeThreadId tid;
979 mono_error_init (error);
981 if ((thread = mono_thread_internal_current ())) {
982 if (domain != mono_domain_get ())
983 mono_domain_set (domain, TRUE);
984 /* Already attached */
985 return mono_thread_current ();
988 if (!mono_gc_register_thread (&domain)) {
989 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 ());
992 thread = create_internal_thread (error);
993 if (!mono_error_ok (error))
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, error);
1013 if (!mono_error_ok (error))
1016 if (!handle_store (current_thread, force_attach)) {
1017 /* Mono is shutting down, so just wait for the end */
1019 mono_thread_info_sleep (10000, NULL);
1022 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1024 SET_CURRENT_OBJECT (thread);
1025 mono_domain_set (domain, TRUE);
1027 thread_adjust_static_data (thread);
1029 init_root_domain_thread (thread, current_thread, error);
1030 return_val_if_nok (error, NULL);
1032 if (domain != mono_get_root_domain ())
1033 set_current_thread_for_domain (domain, thread, current_thread);
1036 if (mono_thread_attach_cb) {
1040 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1043 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1045 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1048 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1049 if (!info->tools_thread)
1050 // FIXME: Need a separate callback
1051 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1053 return current_thread;
1057 mono_thread_detach_internal (MonoInternalThread *thread)
1059 g_return_if_fail (thread != NULL);
1061 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1063 thread_cleanup (thread);
1065 SET_CURRENT_OBJECT (NULL);
1066 mono_domain_unset ();
1068 /* Don't need to CloseHandle this thread, even though we took a
1069 * reference in mono_thread_attach (), because the GC will do it
1070 * when the Thread object is finalised.
1075 mono_thread_detach (MonoThread *thread)
1078 mono_thread_detach_internal (thread->internal_thread);
1082 * mono_thread_detach_if_exiting:
1084 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1085 * This should be used at the end of embedding code which calls into managed code, and which
1086 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1089 mono_thread_detach_if_exiting (void)
1091 if (mono_thread_info_is_exiting ()) {
1092 MonoInternalThread *thread;
1094 thread = mono_thread_internal_current ();
1096 mono_thread_detach_internal (thread);
1097 mono_thread_info_detach ();
1105 MonoInternalThread *thread = mono_thread_internal_current ();
1107 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1109 thread_cleanup (thread);
1110 SET_CURRENT_OBJECT (NULL);
1111 mono_domain_unset ();
1113 /* we could add a callback here for embedders to use. */
1114 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1115 exit (mono_environment_exitcode_get ());
1116 mono_thread_info_exit ();
1120 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1123 MonoInternalThread *internal;
1125 internal = create_internal_thread (&error);
1126 mono_error_raise_exception (&error);
1128 internal->state = ThreadState_Unstarted;
1130 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1134 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1138 StartInfo *start_info;
1139 MonoInternalThread *internal;
1142 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1144 if (!this_obj->internal_thread)
1145 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1146 internal = this_obj->internal_thread;
1148 LOCK_THREAD (internal);
1150 if ((internal->state & ThreadState_Unstarted) == 0) {
1151 UNLOCK_THREAD (internal);
1152 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1156 if ((internal->state & ThreadState_Aborted) != 0) {
1157 UNLOCK_THREAD (internal);
1160 /* This is freed in start_wrapper */
1161 start_info = g_new0 (StartInfo, 1);
1162 start_info->func = NULL;
1163 start_info->start_arg = NULL;
1164 start_info->delegate = start;
1165 start_info->obj = this_obj;
1166 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1168 res = create_thread (this_obj, internal, start_info, FALSE, 0, &error);
1170 mono_error_cleanup (&error);
1171 UNLOCK_THREAD (internal);
1175 internal->state &= ~ThreadState_Unstarted;
1177 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1179 UNLOCK_THREAD (internal);
1180 return internal->handle;
1184 * This is called from the finalizer of the internal thread object.
1187 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1189 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1192 * Since threads keep a reference to their thread object while running, by the time this function is called,
1193 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1194 * when thread_cleanup () can be called after this.
1197 CloseHandle (thread);
1199 if (this_obj->synch_cs) {
1200 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1201 this_obj->synch_cs = NULL;
1202 mono_coop_mutex_destroy (synch_cs);
1206 if (this_obj->name) {
1207 void *name = this_obj->name;
1208 this_obj->name = NULL;
1214 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1217 MonoInternalThread *thread = mono_thread_internal_current ();
1219 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1221 mono_thread_current_check_pending_interrupt ();
1224 gboolean alerted = FALSE;
1226 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1228 res = mono_thread_info_sleep (ms, &alerted);
1230 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1233 MonoException* exc = mono_thread_execute_interruption ();
1235 mono_raise_exception (exc);
1247 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1252 ves_icall_System_Threading_Thread_GetDomainID (void)
1254 return mono_domain_get()->domain_id;
1258 ves_icall_System_Threading_Thread_Yield (void)
1260 return mono_thread_info_yield ();
1264 * mono_thread_get_name:
1266 * Return the name of the thread. NAME_LEN is set to the length of the name.
1267 * Return NULL if the thread has no name. The returned memory is owned by the
1271 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1275 LOCK_THREAD (this_obj);
1277 if (!this_obj->name) {
1281 *name_len = this_obj->name_len;
1282 res = g_new (gunichar2, this_obj->name_len);
1283 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1286 UNLOCK_THREAD (this_obj);
1292 * mono_thread_get_name_utf8:
1294 * Return the name of the thread in UTF-8.
1295 * Return NULL if the thread has no name.
1296 * The returned memory is owned by the caller.
1299 mono_thread_get_name_utf8 (MonoThread *thread)
1304 MonoInternalThread *internal = thread->internal_thread;
1305 if (internal == NULL)
1308 LOCK_THREAD (internal);
1310 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1312 UNLOCK_THREAD (internal);
1318 * mono_thread_get_managed_id:
1320 * Return the Thread.ManagedThreadId value of `thread`.
1321 * Returns -1 if `thread` is NULL.
1324 mono_thread_get_managed_id (MonoThread *thread)
1329 MonoInternalThread *internal = thread->internal_thread;
1330 if (internal == NULL)
1333 int32_t id = internal->managed_id;
1339 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1344 mono_error_init (&error);
1346 LOCK_THREAD (this_obj);
1348 if (!this_obj->name)
1351 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1353 UNLOCK_THREAD (this_obj);
1355 mono_error_raise_exception (&error);
1361 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed, MonoError *error)
1363 LOCK_THREAD (this_obj);
1365 mono_error_init (error);
1367 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1368 UNLOCK_THREAD (this_obj);
1370 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1373 if (this_obj->name) {
1374 g_free (this_obj->name);
1375 this_obj->name_len = 0;
1378 this_obj->name = g_new (gunichar2, mono_string_length (name));
1379 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1380 this_obj->name_len = mono_string_length (name);
1383 this_obj->name = NULL;
1386 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1388 UNLOCK_THREAD (this_obj);
1390 if (this_obj->name && this_obj->tid) {
1391 char *tname = mono_string_to_utf8 (name);
1392 mono_profiler_thread_name (this_obj->tid, tname);
1393 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1399 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1402 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1403 mono_error_set_pending_exception (&error);
1407 * ves_icall_System_Threading_Thread_GetPriority_internal:
1408 * @param this_obj: The MonoInternalThread on which to operate.
1410 * Gets the priority of the given thread.
1411 * @return: The priority of the given thread.
1414 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1417 MonoInternalThread *internal = this_obj->internal_thread;
1419 LOCK_THREAD (internal);
1420 priority = GetThreadPriority (internal->handle) + 2;
1421 UNLOCK_THREAD (internal);
1426 * ves_icall_System_Threading_Thread_SetPriority_internal:
1427 * @param this_obj: The MonoInternalThread on which to operate.
1428 * @param priority: The priority to set.
1430 * Sets the priority of the given thread.
1433 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1435 MonoInternalThread *internal = this_obj->internal_thread;
1437 LOCK_THREAD (internal);
1438 SetThreadPriority (internal->handle, priority - 2);
1439 UNLOCK_THREAD (internal);
1442 /* If the array is already in the requested domain, we just return it,
1443 otherwise we return a copy in that domain. */
1445 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1449 mono_error_init (error);
1453 if (mono_object_domain (arr) == domain)
1456 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1457 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1462 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1465 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1466 mono_error_set_pending_exception (&error);
1471 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1474 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1475 mono_error_set_pending_exception (&error);
1480 mono_thread_current (void)
1483 MonoDomain *domain = mono_domain_get ();
1484 MonoInternalThread *internal = mono_thread_internal_current ();
1485 MonoThread **current_thread_ptr;
1487 g_assert (internal);
1488 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1490 if (!*current_thread_ptr) {
1491 g_assert (domain != mono_get_root_domain ());
1492 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1493 mono_error_raise_exception (&error); /* FIXME don't raise here */
1495 return *current_thread_ptr;
1498 /* Return the thread object belonging to INTERNAL in the current domain */
1500 mono_thread_current_for_thread (MonoInternalThread *internal)
1503 MonoDomain *domain = mono_domain_get ();
1504 MonoThread **current_thread_ptr;
1506 g_assert (internal);
1507 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1509 if (!*current_thread_ptr) {
1510 g_assert (domain != mono_get_root_domain ());
1511 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1512 mono_error_raise_exception (&error); /* FIXME don't raise here */
1514 return *current_thread_ptr;
1518 mono_thread_internal_current (void)
1520 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1521 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1526 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1528 MonoInternalThread *thread = this_obj->internal_thread;
1529 HANDLE handle = thread->handle;
1530 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1533 mono_thread_current_check_pending_interrupt ();
1535 LOCK_THREAD (thread);
1537 if ((thread->state & ThreadState_Unstarted) != 0) {
1538 UNLOCK_THREAD (thread);
1540 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1544 UNLOCK_THREAD (thread);
1549 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1551 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1553 MONO_PREPARE_BLOCKING;
1554 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1555 MONO_FINISH_BLOCKING;
1557 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1559 if(ret==WAIT_OBJECT_0) {
1560 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1565 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1571 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1579 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1581 MONO_PREPARE_BLOCKING;
1583 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1585 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1586 MONO_FINISH_BLOCKING;
1588 if (ret != WAIT_IO_COMPLETION)
1591 exc = mono_thread_execute_interruption ();
1593 mono_raise_exception (exc);
1598 /* Re-calculate ms according to the time passed */
1599 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1600 if (diff_ms >= ms) {
1604 wait = ms - diff_ms;
1610 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1616 MonoObject *waitHandle;
1617 MonoInternalThread *thread = mono_thread_internal_current ();
1619 /* Do this WaitSleepJoin check before creating objects */
1620 mono_thread_current_check_pending_interrupt ();
1622 /* We fail in managed if the array has more than 64 elements */
1623 numhandles = (guint32)mono_array_length(mono_handles);
1624 handles = g_new0(HANDLE, numhandles);
1626 for(i = 0; i < numhandles; i++) {
1627 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1628 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1635 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1637 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1639 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1643 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1644 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1647 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1649 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1650 uintptr_t numhandles;
1653 MonoObject *waitHandle;
1654 MonoInternalThread *thread = mono_thread_internal_current ();
1656 /* Do this WaitSleepJoin check before creating objects */
1657 mono_thread_current_check_pending_interrupt ();
1659 numhandles = mono_array_length(mono_handles);
1660 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1663 for(i = 0; i < numhandles; i++) {
1664 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1665 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1672 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1674 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1676 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1678 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1681 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1683 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1684 return ret - WAIT_OBJECT_0;
1686 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1687 return ret - WAIT_ABANDONED_0;
1690 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1691 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1695 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1698 MonoInternalThread *thread = mono_thread_internal_current ();
1700 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1706 mono_thread_current_check_pending_interrupt ();
1708 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1710 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1712 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1714 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1715 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1719 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1722 MonoInternalThread *thread = mono_thread_internal_current ();
1727 mono_thread_current_check_pending_interrupt ();
1729 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1731 MONO_PREPARE_BLOCKING;
1732 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1733 MONO_FINISH_BLOCKING;
1735 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1737 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1738 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1741 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1748 mutex = CreateMutex (NULL, owned, NULL);
1750 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1752 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1760 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1761 return(ReleaseMutex (handle));
1764 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1770 *error = ERROR_SUCCESS;
1772 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1774 *error = GetLastError ();
1781 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1788 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1790 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1791 mono_string_chars (name));
1793 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1801 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1805 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1810 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1814 *error = ERROR_SUCCESS;
1816 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1818 *error = GetLastError ();
1824 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1831 event = CreateEvent (NULL, manual, initial, NULL);
1833 event = CreateEvent (NULL, manual, initial,
1834 mono_string_chars (name));
1836 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1844 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1845 return (SetEvent(handle));
1848 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1849 return (ResetEvent(handle));
1853 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1854 CloseHandle (handle);
1857 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1863 *error = ERROR_SUCCESS;
1865 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1867 *error = GetLastError ();
1873 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1875 return InterlockedIncrement (location);
1878 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1880 #if SIZEOF_VOID_P == 4
1881 if (G_UNLIKELY ((size_t)location & 0x7)) {
1883 mono_interlocked_lock ();
1886 mono_interlocked_unlock ();
1890 return InterlockedIncrement64 (location);
1893 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1895 return InterlockedDecrement(location);
1898 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1900 #if SIZEOF_VOID_P == 4
1901 if (G_UNLIKELY ((size_t)location & 0x7)) {
1903 mono_interlocked_lock ();
1906 mono_interlocked_unlock ();
1910 return InterlockedDecrement64 (location);
1913 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1915 return InterlockedExchange(location, value);
1918 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1921 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1922 mono_gc_wbarrier_generic_nostore (location);
1926 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1928 return InterlockedExchangePointer(location, value);
1931 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1933 IntFloatUnion val, ret;
1936 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1942 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1944 #if SIZEOF_VOID_P == 4
1945 if (G_UNLIKELY ((size_t)location & 0x7)) {
1947 mono_interlocked_lock ();
1950 mono_interlocked_unlock ();
1954 return InterlockedExchange64 (location, value);
1958 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1960 LongDoubleUnion val, ret;
1963 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1968 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1970 return InterlockedCompareExchange(location, value, comparand);
1973 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1975 gint32 r = InterlockedCompareExchange(location, value, comparand);
1976 *success = r == comparand;
1980 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1983 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1984 mono_gc_wbarrier_generic_nostore (location);
1988 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1990 return InterlockedCompareExchangePointer(location, value, comparand);
1993 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1995 IntFloatUnion val, ret, cmp;
1998 cmp.fval = comparand;
1999 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2005 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2007 #if SIZEOF_VOID_P == 8
2008 LongDoubleUnion val, comp, ret;
2011 comp.fval = comparand;
2012 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2018 mono_interlocked_lock ();
2020 if (old == comparand)
2022 mono_interlocked_unlock ();
2029 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2031 #if SIZEOF_VOID_P == 4
2032 if (G_UNLIKELY ((size_t)location & 0x7)) {
2034 mono_interlocked_lock ();
2036 if (old == comparand)
2038 mono_interlocked_unlock ();
2042 return InterlockedCompareExchange64 (location, value, comparand);
2046 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2049 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2050 mono_gc_wbarrier_generic_nostore (location);
2055 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2058 MONO_CHECK_NULL (location, NULL);
2059 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2060 mono_gc_wbarrier_generic_nostore (location);
2065 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2067 return InterlockedAdd (location, value);
2071 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2073 #if SIZEOF_VOID_P == 4
2074 if (G_UNLIKELY ((size_t)location & 0x7)) {
2076 mono_interlocked_lock ();
2079 mono_interlocked_unlock ();
2083 return InterlockedAdd64 (location, value);
2087 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2089 #if SIZEOF_VOID_P == 4
2090 if (G_UNLIKELY ((size_t)location & 0x7)) {
2092 mono_interlocked_lock ();
2094 mono_interlocked_unlock ();
2098 return InterlockedRead64 (location);
2102 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2104 mono_memory_barrier ();
2108 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2110 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2112 if (state & ThreadState_Background) {
2113 /* If the thread changes the background mode, the main thread has to
2114 * be notified, since it has to rebuild the list of threads to
2117 SetEvent (background_change_event);
2122 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2124 mono_thread_set_state (this_obj, (MonoThreadState)state);
2126 if (state & ThreadState_Background) {
2127 /* If the thread changes the background mode, the main thread has to
2128 * be notified, since it has to rebuild the list of threads to
2131 SetEvent (background_change_event);
2136 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2140 LOCK_THREAD (this_obj);
2142 state = this_obj->state;
2144 UNLOCK_THREAD (this_obj);
2149 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2151 MonoInternalThread *current;
2153 MonoInternalThread *thread = this_obj->internal_thread;
2155 LOCK_THREAD (thread);
2157 current = mono_thread_internal_current ();
2159 thread->thread_interrupt_requested = TRUE;
2160 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2162 UNLOCK_THREAD (thread);
2165 async_abort_internal (thread, FALSE);
2169 void mono_thread_current_check_pending_interrupt ()
2171 MonoInternalThread *thread = mono_thread_internal_current ();
2172 gboolean throw_ = FALSE;
2174 LOCK_THREAD (thread);
2176 if (thread->thread_interrupt_requested) {
2178 thread->thread_interrupt_requested = FALSE;
2181 UNLOCK_THREAD (thread);
2184 mono_raise_exception (mono_get_exception_thread_interrupted ());
2189 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2191 LOCK_THREAD (thread);
2193 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2194 (thread->state & ThreadState_StopRequested) != 0 ||
2195 (thread->state & ThreadState_Stopped) != 0)
2197 UNLOCK_THREAD (thread);
2201 if ((thread->state & ThreadState_Unstarted) != 0) {
2202 thread->state |= ThreadState_Aborted;
2203 UNLOCK_THREAD (thread);
2207 thread->state |= ThreadState_AbortRequested;
2208 if (thread->abort_state_handle)
2209 mono_gchandle_free (thread->abort_state_handle);
2211 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2212 g_assert (thread->abort_state_handle);
2214 thread->abort_state_handle = 0;
2216 thread->abort_exc = NULL;
2218 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));
2220 /* During shutdown, we can't wait for other threads */
2222 /* Make sure the thread is awake */
2223 mono_thread_resume (thread);
2225 UNLOCK_THREAD (thread);
2227 if (thread == mono_thread_internal_current ())
2228 self_abort_internal ();
2230 async_abort_internal (thread, TRUE);
2234 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2236 MonoInternalThread *thread = mono_thread_internal_current ();
2237 gboolean was_aborting;
2239 LOCK_THREAD (thread);
2240 was_aborting = thread->state & ThreadState_AbortRequested;
2241 thread->state &= ~ThreadState_AbortRequested;
2242 UNLOCK_THREAD (thread);
2244 if (!was_aborting) {
2245 const char *msg = "Unable to reset abort because no abort was requested";
2246 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2249 thread->abort_exc = NULL;
2250 if (thread->abort_state_handle) {
2251 mono_gchandle_free (thread->abort_state_handle);
2252 /* This is actually not necessary - the handle
2253 only counts if the exception is set */
2254 thread->abort_state_handle = 0;
2259 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2261 LOCK_THREAD (thread);
2263 thread->state &= ~ThreadState_AbortRequested;
2265 if (thread->abort_exc) {
2266 thread->abort_exc = NULL;
2267 if (thread->abort_state_handle) {
2268 mono_gchandle_free (thread->abort_state_handle);
2269 /* This is actually not necessary - the handle
2270 only counts if the exception is set */
2271 thread->abort_state_handle = 0;
2275 UNLOCK_THREAD (thread);
2279 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2282 MonoInternalThread *thread = this_obj->internal_thread;
2283 MonoObject *state, *deserialized = NULL;
2286 if (!thread->abort_state_handle)
2289 state = mono_gchandle_get_target (thread->abort_state_handle);
2292 domain = mono_domain_get ();
2293 if (mono_object_domain (state) == domain)
2296 deserialized = mono_object_xdomain_representation (state, domain, &error);
2298 if (!deserialized) {
2299 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2300 if (!is_ok (&error)) {
2301 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2302 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2304 mono_set_pending_exception (invalid_op_exc);
2308 return deserialized;
2312 mono_thread_suspend (MonoInternalThread *thread)
2314 LOCK_THREAD (thread);
2316 if ((thread->state & ThreadState_Unstarted) != 0 ||
2317 (thread->state & ThreadState_Aborted) != 0 ||
2318 (thread->state & ThreadState_Stopped) != 0)
2320 UNLOCK_THREAD (thread);
2324 if ((thread->state & ThreadState_Suspended) != 0 ||
2325 (thread->state & ThreadState_SuspendRequested) != 0 ||
2326 (thread->state & ThreadState_StopRequested) != 0)
2328 UNLOCK_THREAD (thread);
2332 thread->state |= ThreadState_SuspendRequested;
2334 if (thread == mono_thread_internal_current ()) {
2335 /* calls UNLOCK_THREAD (thread) */
2336 self_suspend_internal ();
2338 /* calls UNLOCK_THREAD (thread) */
2339 async_suspend_internal (thread, FALSE);
2346 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2348 if (!mono_thread_suspend (this_obj->internal_thread)) {
2349 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2354 /* LOCKING: LOCK_THREAD(thread) must be held */
2356 mono_thread_resume (MonoInternalThread *thread)
2358 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2359 thread->state &= ~ThreadState_SuspendRequested;
2363 if ((thread->state & ThreadState_Suspended) == 0 ||
2364 (thread->state & ThreadState_Unstarted) != 0 ||
2365 (thread->state & ThreadState_Aborted) != 0 ||
2366 (thread->state & ThreadState_Stopped) != 0)
2371 UNLOCK_THREAD (thread);
2373 /* Awake the thread */
2374 if (!mono_thread_info_resume (thread_get_tid (thread)))
2377 LOCK_THREAD (thread);
2379 thread->state &= ~ThreadState_Suspended;
2385 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2387 if (!thread->internal_thread) {
2388 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2390 LOCK_THREAD (thread->internal_thread);
2391 if (!mono_thread_resume (thread->internal_thread))
2392 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2393 UNLOCK_THREAD (thread->internal_thread);
2398 mono_threads_is_critical_method (MonoMethod *method)
2400 switch (method->wrapper_type) {
2401 case MONO_WRAPPER_RUNTIME_INVOKE:
2402 case MONO_WRAPPER_XDOMAIN_INVOKE:
2403 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2410 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2415 if (mono_threads_is_critical_method (m)) {
2416 *((gboolean*)data) = TRUE;
2423 is_running_protected_wrapper (void)
2425 gboolean found = FALSE;
2426 mono_stack_walk (find_wrapper, &found);
2430 void mono_thread_internal_stop (MonoInternalThread *thread)
2432 LOCK_THREAD (thread);
2434 if ((thread->state & ThreadState_StopRequested) != 0 ||
2435 (thread->state & ThreadState_Stopped) != 0)
2437 UNLOCK_THREAD (thread);
2441 /* Make sure the thread is awake */
2442 mono_thread_resume (thread);
2444 thread->state |= ThreadState_StopRequested;
2445 thread->state &= ~ThreadState_AbortRequested;
2447 UNLOCK_THREAD (thread);
2449 if (thread == mono_thread_internal_current ())
2450 self_abort_internal ();
2452 async_abort_internal (thread, TRUE);
2455 void mono_thread_stop (MonoThread *thread)
2457 mono_thread_internal_stop (thread->internal_thread);
2461 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2463 gint8 tmp = *(volatile gint8 *)ptr;
2464 mono_memory_barrier ();
2469 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2471 gint16 tmp = *(volatile gint16 *)ptr;
2472 mono_memory_barrier ();
2477 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2479 gint32 tmp = *(volatile gint32 *)ptr;
2480 mono_memory_barrier ();
2485 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2487 gint64 tmp = *(volatile gint64 *)ptr;
2488 mono_memory_barrier ();
2493 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2495 volatile void *tmp = *(volatile void **)ptr;
2496 mono_memory_barrier ();
2497 return (void *) tmp;
2501 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2503 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2504 mono_memory_barrier ();
2505 return (MonoObject *) tmp;
2509 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2511 double tmp = *(volatile double *)ptr;
2512 mono_memory_barrier ();
2517 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2519 float tmp = *(volatile float *)ptr;
2520 mono_memory_barrier ();
2525 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2527 return InterlockedRead8 ((volatile gint8 *)ptr);
2531 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2533 return InterlockedRead16 ((volatile gint16 *)ptr);
2537 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2539 return InterlockedRead ((volatile gint32 *)ptr);
2543 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2545 #if SIZEOF_VOID_P == 4
2546 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2548 mono_interlocked_lock ();
2549 val = *(gint64*)ptr;
2550 mono_interlocked_unlock ();
2554 return InterlockedRead64 ((volatile gint64 *)ptr);
2558 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2560 return InterlockedReadPointer ((volatile gpointer *)ptr);
2564 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2568 #if SIZEOF_VOID_P == 4
2569 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2571 mono_interlocked_lock ();
2572 val = *(double*)ptr;
2573 mono_interlocked_unlock ();
2578 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2584 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2588 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2594 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2596 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2600 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2602 mono_memory_barrier ();
2603 *(volatile gint8 *)ptr = value;
2607 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2609 mono_memory_barrier ();
2610 *(volatile gint16 *)ptr = value;
2614 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2616 mono_memory_barrier ();
2617 *(volatile gint32 *)ptr = value;
2621 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2623 mono_memory_barrier ();
2624 *(volatile gint64 *)ptr = value;
2628 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2630 mono_memory_barrier ();
2631 *(volatile void **)ptr = value;
2635 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2637 mono_memory_barrier ();
2638 mono_gc_wbarrier_generic_store (ptr, value);
2642 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2644 mono_memory_barrier ();
2645 *(volatile double *)ptr = value;
2649 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2651 mono_memory_barrier ();
2652 *(volatile float *)ptr = value;
2656 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2658 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2662 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2664 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2668 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2670 InterlockedWrite ((volatile gint32 *)ptr, value);
2674 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2676 #if SIZEOF_VOID_P == 4
2677 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2678 mono_interlocked_lock ();
2679 *(gint64*)ptr = value;
2680 mono_interlocked_unlock ();
2685 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2689 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2691 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2695 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2699 #if SIZEOF_VOID_P == 4
2700 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2701 mono_interlocked_lock ();
2702 *(double*)ptr = value;
2703 mono_interlocked_unlock ();
2710 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2714 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2720 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2724 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2726 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2730 free_context (void *user_data)
2732 ContextStaticData *data = user_data;
2734 mono_threads_lock ();
2737 * There is no guarantee that, by the point this reference queue callback
2738 * has been invoked, the GC handle associated with the object will fail to
2739 * resolve as one might expect. So if we don't free and remove the GC
2740 * handle here, free_context_static_data_helper () could end up resolving
2741 * a GC handle to an actually-dead context which would contain a pointer
2742 * to an already-freed static data segment, resulting in a crash when
2745 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2747 mono_threads_unlock ();
2749 mono_gchandle_free (data->gc_handle);
2750 mono_free_static_data (data->static_data);
2755 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2757 mono_threads_lock ();
2759 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2762 contexts = g_hash_table_new (NULL, NULL);
2765 context_queue = mono_gc_reference_queue_new (free_context);
2767 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2768 g_hash_table_insert (contexts, gch, gch);
2771 * We use this intermediate structure to contain a duplicate pointer to
2772 * the static data because we can't rely on being able to resolve the GC
2773 * handle in the reference queue callback.
2775 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2776 data->gc_handle = GPOINTER_TO_UINT (gch);
2779 context_adjust_static_data (ctx);
2780 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2782 mono_threads_unlock ();
2784 mono_profiler_context_loaded (ctx);
2788 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2791 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2792 * cleanup in exceptional circumstances, we don't actually do any
2793 * cleanup work here. We instead do this via a reference queue.
2796 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2798 mono_profiler_context_unloaded (ctx);
2802 mono_thread_init_tls (void)
2804 MONO_FAST_TLS_INIT (tls_current_object);
2805 mono_native_tls_alloc (¤t_object_key, NULL);
2808 void mono_thread_init (MonoThreadStartCB start_cb,
2809 MonoThreadAttachCB attach_cb)
2811 mono_coop_mutex_init_recursive (&threads_mutex);
2813 mono_os_mutex_init_recursive(&interlocked_mutex);
2814 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2816 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2817 g_assert(background_change_event != NULL);
2819 mono_init_static_data_info (&thread_static_info);
2820 mono_init_static_data_info (&context_static_info);
2822 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2824 mono_thread_start_cb = start_cb;
2825 mono_thread_attach_cb = attach_cb;
2827 /* Get a pseudo handle to the current process. This is just a
2828 * kludge so that wapi can build a process handle if needed.
2829 * As a pseudo handle is returned, we don't need to clean
2832 GetCurrentProcess ();
2835 void mono_thread_cleanup (void)
2837 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2838 MonoThreadInfo *info;
2840 /* The main thread must abandon any held mutexes (particularly
2841 * important for named mutexes as they are shared across
2842 * processes, see bug 74680.) This will happen when the
2843 * thread exits, but if it's not running in a subthread it
2844 * won't exit in time.
2846 info = mono_thread_info_current ();
2847 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2851 /* This stuff needs more testing, it seems one of these
2852 * critical sections can be locked when mono_thread_cleanup is
2855 mono_coop_mutex_destroy (&threads_mutex);
2856 mono_os_mutex_destroy (&interlocked_mutex);
2857 mono_os_mutex_destroy (&delayed_free_table_mutex);
2858 mono_os_mutex_destroy (&small_id_mutex);
2859 CloseHandle (background_change_event);
2862 mono_native_tls_free (current_object_key);
2866 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2868 mono_thread_cleanup_fn = func;
2872 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2874 thread->internal_thread->manage_callback = func;
2878 static void print_tids (gpointer key, gpointer value, gpointer user)
2880 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2881 * sizeof(uint) and a cast to uint would overflow
2883 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2884 * print this as a pointer.
2886 g_message ("Waiting for: %p", key);
2891 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2892 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2896 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2900 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2902 MONO_PREPARE_BLOCKING;
2903 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2904 MONO_FINISH_BLOCKING;
2906 if(ret==WAIT_FAILED) {
2907 /* See the comment in build_wait_tids() */
2908 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2912 for(i=0; i<wait->num; i++)
2913 CloseHandle (wait->handles[i]);
2915 if (ret == WAIT_TIMEOUT)
2918 for(i=0; i<wait->num; i++) {
2919 gsize tid = wait->threads[i]->tid;
2922 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2923 * it can still run io-layer etc. code. So wait for it to really exit.
2924 * FIXME: This won't join threads which are not in the joinable_hash yet.
2926 mono_thread_join ((gpointer)tid);
2928 mono_threads_lock ();
2929 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2930 /* This thread must have been killed, because
2931 * it hasn't cleaned itself up. (It's just
2932 * possible that the thread exited before the
2933 * parent thread had a chance to store the
2934 * handle, and now there is another pointer to
2935 * the already-exited thread stored. In this
2936 * case, we'll just get two
2937 * mono_profiler_thread_end() calls for the
2941 mono_threads_unlock ();
2942 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2943 thread_cleanup (wait->threads[i]);
2945 mono_threads_unlock ();
2950 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2952 guint32 i, ret, count;
2954 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2956 /* Add the thread state change event, so it wakes up if a thread changes
2957 * to background mode.
2960 if (count < MAXIMUM_WAIT_OBJECTS) {
2961 wait->handles [count] = background_change_event;
2965 MONO_PREPARE_BLOCKING;
2966 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2967 MONO_FINISH_BLOCKING;
2969 if(ret==WAIT_FAILED) {
2970 /* See the comment in build_wait_tids() */
2971 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2975 for(i=0; i<wait->num; i++)
2976 CloseHandle (wait->handles[i]);
2978 if (ret == WAIT_TIMEOUT)
2981 if (ret < wait->num) {
2982 gsize tid = wait->threads[ret]->tid;
2983 mono_threads_lock ();
2984 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2985 /* See comment in wait_for_tids about thread cleanup */
2986 mono_threads_unlock ();
2987 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2988 thread_cleanup (wait->threads [ret]);
2990 mono_threads_unlock ();
2994 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2996 struct wait_data *wait=(struct wait_data *)user;
2998 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
3000 MonoInternalThread *thread=(MonoInternalThread *)value;
3002 /* Ignore background threads, we abort them later */
3003 /* Do not lock here since it is not needed and the caller holds threads_lock */
3004 if (thread->state & ThreadState_Background) {
3005 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3006 return; /* just leave, ignore */
3009 if (mono_gc_is_finalizer_internal_thread (thread)) {
3010 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3014 if (thread == mono_thread_internal_current ()) {
3015 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3019 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3020 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3024 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3025 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3029 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3030 if (handle == NULL) {
3031 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3035 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3036 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3037 wait->handles[wait->num]=handle;
3038 wait->threads[wait->num]=thread;
3041 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3043 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3048 /* Just ignore the rest, we can't do anything with
3055 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3057 struct wait_data *wait=(struct wait_data *)user;
3058 MonoNativeThreadId self = mono_native_thread_id_get ();
3059 MonoInternalThread *thread = (MonoInternalThread *)value;
3062 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3065 /* The finalizer thread is not a background thread */
3066 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3067 && (thread->state & ThreadState_Background) != 0
3068 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3070 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3074 /* printf ("A: %d\n", wait->num); */
3075 wait->handles[wait->num]=thread->handle;
3076 wait->threads[wait->num]=thread;
3079 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3080 mono_thread_internal_stop (thread);
3084 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3085 && !mono_gc_is_finalizer_internal_thread (thread);
3089 * mono_threads_set_shutting_down:
3091 * Is called by a thread that wants to shut down Mono. If the runtime is already
3092 * shutting down, the calling thread is suspended/stopped, and this function never
3096 mono_threads_set_shutting_down (void)
3098 MonoInternalThread *current_thread = mono_thread_internal_current ();
3100 mono_threads_lock ();
3102 if (shutting_down) {
3103 mono_threads_unlock ();
3105 /* Make sure we're properly suspended/stopped */
3107 LOCK_THREAD (current_thread);
3109 if ((current_thread->state & ThreadState_SuspendRequested) ||
3110 (current_thread->state & ThreadState_AbortRequested) ||
3111 (current_thread->state & ThreadState_StopRequested)) {
3112 UNLOCK_THREAD (current_thread);
3113 mono_thread_execute_interruption ();
3115 current_thread->state |= ThreadState_Stopped;
3116 UNLOCK_THREAD (current_thread);
3119 /*since we're killing the thread, unset the current domain.*/
3120 mono_domain_unset ();
3122 /* Wake up other threads potentially waiting for us */
3123 mono_thread_info_exit ();
3125 shutting_down = TRUE;
3127 /* Not really a background state change, but this will
3128 * interrupt the main thread if it is waiting for all
3129 * the other threads.
3131 SetEvent (background_change_event);
3133 mono_threads_unlock ();
3137 void mono_thread_manage (void)
3139 struct wait_data wait_data;
3140 struct wait_data *wait = &wait_data;
3142 memset (wait, 0, sizeof (struct wait_data));
3143 /* join each thread that's still running */
3144 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3146 mono_threads_lock ();
3148 THREAD_DEBUG (g_message("%s: No threads", __func__));
3149 mono_threads_unlock ();
3152 mono_threads_unlock ();
3155 mono_threads_lock ();
3156 if (shutting_down) {
3157 /* somebody else is shutting down */
3158 mono_threads_unlock ();
3161 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3162 mono_g_hash_table_foreach (threads, print_tids, NULL));
3164 ResetEvent (background_change_event);
3166 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3167 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3168 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3169 mono_threads_unlock ();
3171 /* Something to wait for */
3172 wait_for_tids_or_state_change (wait, INFINITE);
3174 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3175 } while(wait->num>0);
3177 /* Mono is shutting down, so just wait for the end */
3178 if (!mono_runtime_try_shutdown ()) {
3179 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3180 mono_thread_suspend (mono_thread_internal_current ());
3181 mono_thread_execute_interruption ();
3185 * Remove everything but the finalizer thread and self.
3186 * Also abort all the background threads
3189 mono_threads_lock ();
3192 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3193 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3194 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3196 mono_threads_unlock ();
3198 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3200 /* Something to wait for */
3201 wait_for_tids (wait, INFINITE);
3203 } while (wait->num > 0);
3206 * give the subthreads a chance to really quit (this is mainly needed
3207 * to get correct user and system times from getrusage/wait/time(1)).
3208 * This could be removed if we avoid pthread_detach() and use pthread_join().
3210 mono_thread_info_yield ();
3214 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3216 MonoInternalThread *thread = (MonoInternalThread*)value;
3217 struct wait_data *wait = (struct wait_data*)user_data;
3221 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3223 * This needs no locking.
3225 if ((thread->state & ThreadState_Suspended) != 0 ||
3226 (thread->state & ThreadState_Stopped) != 0)
3229 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3230 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3234 wait->handles [wait->num] = handle;
3235 wait->threads [wait->num] = thread;
3241 * mono_thread_suspend_all_other_threads:
3243 * Suspend all managed threads except the finalizer thread and this thread. It is
3244 * not possible to resume them later.
3246 void mono_thread_suspend_all_other_threads (void)
3248 struct wait_data wait_data;
3249 struct wait_data *wait = &wait_data;
3251 MonoNativeThreadId self = mono_native_thread_id_get ();
3252 guint32 eventidx = 0;
3253 gboolean starting, finished;
3255 memset (wait, 0, sizeof (struct wait_data));
3257 * The other threads could be in an arbitrary state at this point, i.e.
3258 * they could be starting up, shutting down etc. This means that there could be
3259 * threads which are not even in the threads hash table yet.
3263 * First we set a barrier which will be checked by all threads before they
3264 * are added to the threads hash table, and they will exit if the flag is set.
3265 * This ensures that no threads could be added to the hash later.
3266 * We will use shutting_down as the barrier for now.
3268 g_assert (shutting_down);
3271 * We make multiple calls to WaitForMultipleObjects since:
3272 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3273 * - some threads could exit without becoming suspended
3278 * Make a copy of the hashtable since we can't do anything with
3279 * threads while threads_mutex is held.
3282 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3283 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3284 mono_threads_lock ();
3285 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3286 mono_threads_unlock ();
3289 /* Get the suspended events that we'll be waiting for */
3290 for (i = 0; i < wait->num; ++i) {
3291 MonoInternalThread *thread = wait->threads [i];
3293 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3294 || mono_gc_is_finalizer_internal_thread (thread)
3295 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3297 //CloseHandle (wait->handles [i]);
3298 wait->threads [i] = NULL; /* ignore this thread in next loop */
3302 LOCK_THREAD (thread);
3304 if ((thread->state & ThreadState_Suspended) != 0 ||
3305 (thread->state & ThreadState_StopRequested) != 0 ||
3306 (thread->state & ThreadState_Stopped) != 0) {
3307 UNLOCK_THREAD (thread);
3308 CloseHandle (wait->handles [i]);
3309 wait->threads [i] = NULL; /* ignore this thread in next loop */
3315 /* Convert abort requests into suspend requests */
3316 if ((thread->state & ThreadState_AbortRequested) != 0)
3317 thread->state &= ~ThreadState_AbortRequested;
3319 thread->state |= ThreadState_SuspendRequested;
3321 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3322 async_suspend_internal (thread, TRUE);
3324 if (eventidx <= 0) {
3326 * If there are threads which are starting up, we wait until they
3327 * are suspended when they try to register in the threads hash.
3328 * This is guaranteed to finish, since the threads which can create new
3329 * threads get suspended after a while.
3330 * FIXME: The finalizer thread can still create new threads.
3332 mono_threads_lock ();
3333 if (threads_starting_up)
3334 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3337 mono_threads_unlock ();
3339 mono_thread_info_sleep (100, NULL);
3347 MonoInternalThread *thread;
3348 MonoStackFrameInfo *frames;
3349 int nframes, max_frames;
3350 int nthreads, max_threads;
3351 MonoInternalThread **threads;
3352 } ThreadDumpUserData;
3354 static gboolean thread_dump_requested;
3356 /* This needs to be async safe */
3358 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3360 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3362 if (ud->nframes < ud->max_frames) {
3363 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3370 /* This needs to be async safe */
3371 static SuspendThreadResult
3372 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3374 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3375 MonoInternalThread *thread = user_data->thread;
3378 /* This no longer works with remote unwinding */
3380 wapi_desc = wapi_current_thread_desc ();
3381 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3386 if (thread == mono_thread_internal_current ())
3387 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3389 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3391 return MonoResumeThread;
3395 int nthreads, max_threads;
3396 MonoInternalThread **threads;
3397 } CollectThreadsUserData;
3400 collect_thread (gpointer key, gpointer value, gpointer user)
3402 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3403 MonoInternalThread *thread = (MonoInternalThread *)value;
3405 if (ud->nthreads < ud->max_threads)
3406 ud->threads [ud->nthreads ++] = thread;
3410 * Collect running threads into the THREADS array.
3411 * THREADS should be an array allocated on the stack.
3414 collect_threads (MonoInternalThread **thread_array, int max_threads)
3416 CollectThreadsUserData ud;
3418 memset (&ud, 0, sizeof (ud));
3419 /* This array contains refs, but its on the stack, so its ok */
3420 ud.threads = thread_array;
3421 ud.max_threads = max_threads;
3423 mono_threads_lock ();
3424 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3425 mono_threads_unlock ();
3431 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3433 GString* text = g_string_new (0);
3435 GError *error = NULL;
3438 ud->thread = thread;
3441 /* Collect frames for the thread */
3442 if (thread == mono_thread_internal_current ()) {
3443 get_thread_dump (mono_thread_info_current (), ud);
3445 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3449 * Do all the non async-safe work outside of get_thread_dump.
3452 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3454 g_string_append_printf (text, "\n\"%s\"", name);
3457 else if (thread->threadpool_thread) {
3458 g_string_append (text, "\n\"<threadpool thread>\"");
3460 g_string_append (text, "\n\"<unnamed thread>\"");
3463 for (i = 0; i < ud->nframes; ++i) {
3464 MonoStackFrameInfo *frame = &ud->frames [i];
3465 MonoMethod *method = NULL;
3467 if (frame->type == FRAME_TYPE_MANAGED)
3468 method = mono_jit_info_get_method (frame->ji);
3471 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3472 g_string_append_printf (text, " %s\n", location);
3475 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3479 fprintf (stdout, "%s", text->str);
3481 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3482 OutputDebugStringA(text->str);
3485 g_string_free (text, TRUE);
3490 mono_threads_perform_thread_dump (void)
3492 ThreadDumpUserData ud;
3493 MonoInternalThread *thread_array [128];
3494 int tindex, nthreads;
3496 if (!thread_dump_requested)
3499 printf ("Full thread dump:\n");
3501 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3502 nthreads = collect_threads (thread_array, 128);
3504 memset (&ud, 0, sizeof (ud));
3505 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3506 ud.max_frames = 256;
3508 for (tindex = 0; tindex < nthreads; ++tindex)
3509 dump_thread (thread_array [tindex], &ud);
3513 thread_dump_requested = FALSE;
3516 /* Obtain the thread dump of all threads */
3518 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3522 ThreadDumpUserData ud;
3523 MonoInternalThread *thread_array [128];
3524 MonoDomain *domain = mono_domain_get ();
3525 MonoDebugSourceLocation *location;
3526 int tindex, nthreads;
3528 mono_error_init (&error);
3530 *out_threads = NULL;
3531 *out_stack_frames = NULL;
3533 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3534 nthreads = collect_threads (thread_array, 128);
3536 memset (&ud, 0, sizeof (ud));
3537 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3538 ud.max_frames = 256;
3540 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, &error);
3541 if (!is_ok (&error))
3543 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, &error);
3544 if (!is_ok (&error))
3547 for (tindex = 0; tindex < nthreads; ++tindex) {
3548 MonoInternalThread *thread = thread_array [tindex];
3549 MonoArray *thread_frames;
3555 /* Collect frames for the thread */
3556 if (thread == mono_thread_internal_current ()) {
3557 get_thread_dump (mono_thread_info_current (), &ud);
3559 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3562 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3564 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, &error);
3565 if (!is_ok (&error))
3567 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3569 for (i = 0; i < ud.nframes; ++i) {
3570 MonoStackFrameInfo *frame = &ud.frames [i];
3571 MonoMethod *method = NULL;
3572 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3573 if (!mono_error_ok (&error))
3576 sf->native_offset = frame->native_offset;
3578 if (frame->type == FRAME_TYPE_MANAGED)
3579 method = mono_jit_info_get_method (frame->ji);
3582 sf->method_address = (gsize) frame->ji->code_start;
3584 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3585 mono_error_raise_exception (&error); /* FIXME don't raise here */
3586 MONO_OBJECT_SETREF (sf, method, rm);
3588 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3590 sf->il_offset = location->il_offset;
3592 if (location && location->source_file) {
3593 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3594 sf->line = location->row;
3595 sf->column = location->column;
3597 mono_debug_free_source_location (location);
3602 mono_array_setref (thread_frames, i, sf);
3608 mono_error_raise_exception (&error); /* FIXME don't raise here */
3612 * mono_threads_request_thread_dump:
3614 * Ask all threads except the current to print their stacktrace to stdout.
3617 mono_threads_request_thread_dump (void)
3619 /*The new thread dump code runs out of the finalizer thread. */
3620 thread_dump_requested = TRUE;
3621 mono_gc_finalize_notify ();
3626 gint allocated; /* +1 so that refs [allocated] == NULL */
3630 typedef struct ref_stack RefStack;
3633 ref_stack_new (gint initial_size)
3637 initial_size = MAX (initial_size, 16) + 1;
3638 rs = g_new0 (RefStack, 1);
3639 rs->refs = g_new0 (gpointer, initial_size);
3640 rs->allocated = initial_size;
3645 ref_stack_destroy (gpointer ptr)
3647 RefStack *rs = (RefStack *)ptr;
3656 ref_stack_push (RefStack *rs, gpointer ptr)
3658 g_assert (rs != NULL);
3660 if (rs->bottom >= rs->allocated) {
3661 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3662 rs->allocated <<= 1;
3663 rs->refs [rs->allocated] = NULL;
3665 rs->refs [rs->bottom++] = ptr;
3669 ref_stack_pop (RefStack *rs)
3671 if (rs == NULL || rs->bottom == 0)
3675 rs->refs [rs->bottom] = NULL;
3679 ref_stack_find (RefStack *rs, gpointer ptr)
3686 for (refs = rs->refs; refs && *refs; refs++) {
3694 * mono_thread_push_appdomain_ref:
3696 * Register that the current thread may have references to objects in domain
3697 * @domain on its stack. Each call to this function should be paired with a
3698 * call to pop_appdomain_ref.
3701 mono_thread_push_appdomain_ref (MonoDomain *domain)
3703 MonoInternalThread *thread = mono_thread_internal_current ();
3706 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3707 SPIN_LOCK (thread->lock_thread_id);
3708 if (thread->appdomain_refs == NULL)
3709 thread->appdomain_refs = ref_stack_new (16);
3710 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3711 SPIN_UNLOCK (thread->lock_thread_id);
3716 mono_thread_pop_appdomain_ref (void)
3718 MonoInternalThread *thread = mono_thread_internal_current ();
3721 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3722 SPIN_LOCK (thread->lock_thread_id);
3723 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3724 SPIN_UNLOCK (thread->lock_thread_id);
3729 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3732 SPIN_LOCK (thread->lock_thread_id);
3733 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3734 SPIN_UNLOCK (thread->lock_thread_id);
3739 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3741 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3744 typedef struct abort_appdomain_data {
3745 struct wait_data wait;
3747 } abort_appdomain_data;
3750 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3752 MonoInternalThread *thread = (MonoInternalThread*)value;
3753 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3754 MonoDomain *domain = data->domain;
3756 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3757 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3759 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3760 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3763 data->wait.handles [data->wait.num] = handle;
3764 data->wait.threads [data->wait.num] = thread;
3767 /* Just ignore the rest, we can't do anything with
3775 * mono_threads_abort_appdomain_threads:
3777 * Abort threads which has references to the given appdomain.
3780 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3782 #ifdef __native_client__
3786 abort_appdomain_data user_data;
3788 int orig_timeout = timeout;
3791 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3793 start_time = mono_msec_ticks ();
3795 mono_threads_lock ();
3797 user_data.domain = domain;
3798 user_data.wait.num = 0;
3799 /* This shouldn't take any locks */
3800 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3801 mono_threads_unlock ();
3803 if (user_data.wait.num > 0) {
3804 /* Abort the threads outside the threads lock */
3805 for (i = 0; i < user_data.wait.num; ++i)
3806 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3809 * We should wait for the threads either to abort, or to leave the
3810 * domain. We can't do the latter, so we wait with a timeout.
3812 wait_for_tids (&user_data.wait, 100);
3815 /* Update remaining time */
3816 timeout -= mono_msec_ticks () - start_time;
3817 start_time = mono_msec_ticks ();
3819 if (orig_timeout != -1 && timeout < 0)
3822 while (user_data.wait.num > 0);
3824 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3830 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3832 MonoInternalThread *thread = (MonoInternalThread*)value;
3833 MonoDomain *domain = (MonoDomain*)user_data;
3836 /* No locking needed here */
3837 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3839 if (thread->cached_culture_info) {
3840 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3841 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3842 if (obj && obj->vtable->domain == domain)
3843 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3849 * mono_threads_clear_cached_culture:
3851 * Clear the cached_current_culture from all threads if it is in the
3855 mono_threads_clear_cached_culture (MonoDomain *domain)
3857 mono_threads_lock ();
3858 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3859 mono_threads_unlock ();
3863 * mono_thread_get_undeniable_exception:
3865 * Return an exception which needs to be raised when leaving a catch clause.
3866 * This is used for undeniable exception propagation.
3869 mono_thread_get_undeniable_exception (void)
3871 MonoInternalThread *thread = mono_thread_internal_current ();
3873 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3875 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3876 * exception if the thread no longer references a dying appdomain.
3878 thread->abort_exc->trace_ips = NULL;
3879 thread->abort_exc->stack_trace = NULL;
3880 return thread->abort_exc;
3886 #if MONO_SMALL_CONFIG
3887 #define NUM_STATIC_DATA_IDX 4
3888 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3892 #define NUM_STATIC_DATA_IDX 8
3893 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3894 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3898 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3899 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3902 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3904 gpointer *static_data = (gpointer *)addr;
3906 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3907 void **ptr = (void **)static_data [i];
3912 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3913 void **p = ptr + idx;
3916 mark_func ((MonoObject**)p, gc_data);
3922 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3924 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3928 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3930 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3934 * mono_alloc_static_data
3936 * Allocate memory blocks for storing threads or context static data
3939 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3941 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3944 gpointer* static_data = *static_data_ptr;
3946 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3947 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3949 if (mono_gc_user_markers_supported ()) {
3950 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3951 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3953 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3954 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3957 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3958 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3959 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3960 *static_data_ptr = static_data;
3961 static_data [0] = static_data;
3964 for (i = 1; i <= idx; ++i) {
3965 if (static_data [i])
3968 if (mono_gc_user_markers_supported ())
3969 static_data [i] = g_malloc0 (static_data_size [i]);
3971 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3972 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3973 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3978 mono_free_static_data (gpointer* static_data)
3981 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3982 gpointer p = static_data [i];
3986 * At this point, the static data pointer array is still registered with the
3987 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3988 * data. Freeing the individual arrays without first nulling their slots
3989 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3990 * such an already freed array. See bug #13813.
3992 static_data [i] = NULL;
3993 mono_memory_write_barrier ();
3994 if (mono_gc_user_markers_supported ())
3997 mono_gc_free_fixed (p);
3999 mono_gc_free_fixed (static_data);
4003 * mono_init_static_data_info
4005 * Initializes static data counters
4007 static void mono_init_static_data_info (StaticDataInfo *static_data)
4009 static_data->idx = 0;
4010 static_data->offset = 0;
4011 static_data->freelist = NULL;
4015 * mono_alloc_static_data_slot
4017 * Generates an offset for static data. static_data contains the counters
4018 * used to generate it.
4021 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4023 if (!static_data->idx && !static_data->offset) {
4025 * we use the first chunk of the first allocation also as
4026 * an array for the rest of the data
4028 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4030 static_data->offset += align - 1;
4031 static_data->offset &= ~(align - 1);
4032 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4033 static_data->idx ++;
4034 g_assert (size <= static_data_size [static_data->idx]);
4035 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4036 static_data->offset = 0;
4038 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4039 static_data->offset += size;
4044 * ensure thread static fields already allocated are valid for thread
4045 * This function is called when a thread is created or on thread attach.
4048 thread_adjust_static_data (MonoInternalThread *thread)
4050 mono_threads_lock ();
4051 if (thread_static_info.offset || thread_static_info.idx > 0) {
4052 /* get the current allocated size */
4053 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4054 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4056 mono_threads_unlock ();
4060 * LOCKING: requires that threads_mutex is held
4063 context_adjust_static_data (MonoAppContext *ctx)
4065 if (context_static_info.offset || context_static_info.idx > 0) {
4066 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4067 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4068 ctx->data->static_data = ctx->static_data;
4073 * LOCKING: requires that threads_mutex is held
4076 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4078 MonoInternalThread *thread = (MonoInternalThread *)value;
4079 guint32 offset = GPOINTER_TO_UINT (user);
4081 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4085 * LOCKING: requires that threads_mutex is held
4088 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4090 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4095 guint32 offset = GPOINTER_TO_UINT (user);
4096 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4097 ctx->data->static_data = ctx->static_data;
4100 static StaticDataFreeList*
4101 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4103 StaticDataFreeList* prev = NULL;
4104 StaticDataFreeList* tmp = static_data->freelist;
4106 if (tmp->size == size) {
4108 prev->next = tmp->next;
4110 static_data->freelist = tmp->next;
4119 #if SIZEOF_VOID_P == 4
4126 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4128 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4130 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4131 MonoBitSet *rb = sets [idx];
4132 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4133 offset /= sizeof (uintptr_t);
4134 /* offset is now the bitmap offset */
4135 for (int i = 0; i < numbits; ++i) {
4136 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4137 mono_bitset_set_fast (rb, offset + i);
4142 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4144 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4145 MonoBitSet *rb = sets [idx];
4146 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4147 offset /= sizeof (uintptr_t);
4148 /* offset is now the bitmap offset */
4149 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4150 mono_bitset_clear_fast (rb, offset + i);
4154 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4156 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4158 StaticDataInfo *info;
4161 if (static_type == SPECIAL_STATIC_THREAD) {
4162 info = &thread_static_info;
4163 sets = thread_reference_bitmaps;
4165 info = &context_static_info;
4166 sets = context_reference_bitmaps;
4169 mono_threads_lock ();
4171 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4175 offset = item->offset;
4178 offset = mono_alloc_static_data_slot (info, size, align);
4181 update_reference_bitmap (sets, offset, bitmap, numbits);
4183 if (static_type == SPECIAL_STATIC_THREAD) {
4184 /* This can be called during startup */
4185 if (threads != NULL)
4186 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4188 if (contexts != NULL)
4189 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4191 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4194 mono_threads_unlock ();
4200 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4202 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4204 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4205 return get_thread_static_data (thread, offset);
4207 return get_context_static_data (thread->current_appcontext, offset);
4212 mono_get_special_static_data (guint32 offset)
4214 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4223 * LOCKING: requires that threads_mutex is held
4226 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4228 MonoInternalThread *thread = (MonoInternalThread *)value;
4229 OffsetSize *data = (OffsetSize *)user;
4230 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4231 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4234 if (!thread->static_data || !thread->static_data [idx])
4236 ptr = ((char*) thread->static_data [idx]) + off;
4237 mono_gc_bzero_atomic (ptr, data->size);
4241 * LOCKING: requires that threads_mutex is held
4244 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4246 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4251 OffsetSize *data = (OffsetSize *)user;
4252 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4253 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4256 if (!ctx->static_data || !ctx->static_data [idx])
4259 ptr = ((char*) ctx->static_data [idx]) + off;
4260 mono_gc_bzero_atomic (ptr, data->size);
4264 do_free_special_slot (guint32 offset, guint32 size)
4266 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4268 StaticDataInfo *info;
4270 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4271 info = &thread_static_info;
4272 sets = thread_reference_bitmaps;
4274 info = &context_static_info;
4275 sets = context_reference_bitmaps;
4278 guint32 data_offset = offset;
4279 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4280 OffsetSize data = { data_offset, size };
4282 clear_reference_bitmap (sets, data.offset, data.size);
4284 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4285 if (threads != NULL)
4286 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4288 if (contexts != NULL)
4289 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4292 if (!mono_runtime_is_shutting_down ()) {
4293 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4295 item->offset = offset;
4298 item->next = info->freelist;
4299 info->freelist = item;
4304 do_free_special (gpointer key, gpointer value, gpointer data)
4306 MonoClassField *field = (MonoClassField *)key;
4307 guint32 offset = GPOINTER_TO_UINT (value);
4310 size = mono_type_size (field->type, &align);
4311 do_free_special_slot (offset, size);
4315 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4317 mono_threads_lock ();
4319 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4321 mono_threads_unlock ();
4325 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4327 /* Only ever called for ThreadLocal instances */
4328 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4330 mono_threads_lock ();
4331 do_free_special_slot (offset, size);
4332 mono_threads_unlock ();
4336 static void CALLBACK dummy_apc (ULONG_PTR param)
4342 * mono_thread_execute_interruption
4344 * Performs the operation that the requested thread state requires (abort,
4347 static MonoException*
4348 mono_thread_execute_interruption (void)
4350 MonoInternalThread *thread = mono_thread_internal_current ();
4351 MonoThread *sys_thread = mono_thread_current ();
4353 LOCK_THREAD (thread);
4355 /* MonoThread::interruption_requested can only be changed with atomics */
4356 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4357 /* this will consume pending APC calls */
4359 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4361 InterlockedDecrement (&thread_interruption_requested);
4363 /* Clear the interrupted flag of the thread so it can wait again */
4364 mono_thread_info_clear_self_interrupt ();
4367 if ((thread->state & ThreadState_AbortRequested) != 0) {
4368 UNLOCK_THREAD (thread);
4369 if (thread->abort_exc == NULL) {
4371 * This might be racy, but it has to be called outside the lock
4372 * since it calls managed code.
4374 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4376 return thread->abort_exc;
4378 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4379 /* calls UNLOCK_THREAD (thread) */
4380 self_suspend_internal ();
4383 else if ((thread->state & ThreadState_StopRequested) != 0) {
4384 /* FIXME: do this through the JIT? */
4386 UNLOCK_THREAD (thread);
4388 mono_thread_exit ();
4390 } else if (sys_thread->pending_exception) {
4393 exc = sys_thread->pending_exception;
4394 sys_thread->pending_exception = NULL;
4396 UNLOCK_THREAD (thread);
4398 } else if (thread->thread_interrupt_requested) {
4400 thread->thread_interrupt_requested = FALSE;
4401 UNLOCK_THREAD (thread);
4403 return(mono_get_exception_thread_interrupted ());
4406 UNLOCK_THREAD (thread);
4412 * mono_thread_request_interruption
4414 * A signal handler can call this method to request the interruption of a
4415 * thread. The result of the interruption will depend on the current state of
4416 * the thread. If the result is an exception that needs to be throw, it is
4417 * provided as return value.
4420 mono_thread_request_interruption (gboolean running_managed)
4422 MonoInternalThread *thread = mono_thread_internal_current ();
4424 /* The thread may already be stopping */
4429 if (thread->interrupt_on_stop &&
4430 thread->state & ThreadState_StopRequested &&
4431 thread->state & ThreadState_Background)
4435 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4437 InterlockedIncrement (&thread_interruption_requested);
4439 if (!running_managed || is_running_protected_wrapper ()) {
4440 /* Can't stop while in unmanaged code. Increase the global interruption
4441 request count. When exiting the unmanaged method the count will be
4442 checked and the thread will be interrupted. */
4444 /* this will awake the thread if it is in WaitForSingleObject
4446 /* Our implementation of this function ignores the func argument */
4448 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4450 mono_thread_info_self_interrupt ();
4455 return mono_thread_execute_interruption ();
4459 /*This function should be called by a thread after it has exited all of
4460 * its handle blocks at interruption time.*/
4462 mono_thread_resume_interruption (void)
4464 MonoInternalThread *thread = mono_thread_internal_current ();
4465 gboolean still_aborting;
4467 /* The thread may already be stopping */
4471 LOCK_THREAD (thread);
4472 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4473 UNLOCK_THREAD (thread);
4475 /*This can happen if the protected block called Thread::ResetAbort*/
4476 if (!still_aborting)
4479 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4481 InterlockedIncrement (&thread_interruption_requested);
4483 mono_thread_info_self_interrupt ();
4485 return mono_thread_execute_interruption ();
4488 gboolean mono_thread_interruption_requested ()
4490 if (thread_interruption_requested) {
4491 MonoInternalThread *thread = mono_thread_internal_current ();
4492 /* The thread may already be stopping */
4494 return (thread->interruption_requested);
4499 static MonoException*
4500 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4502 MonoInternalThread *thread = mono_thread_internal_current ();
4504 /* The thread may already be stopping */
4508 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4509 MonoException* exc = mono_thread_execute_interruption ();
4517 * Performs the interruption of the current thread, if one has been requested,
4518 * and the thread is not running a protected wrapper.
4519 * Return the exception which needs to be thrown, if any.
4522 mono_thread_interruption_checkpoint (void)
4524 return mono_thread_interruption_checkpoint_request (FALSE);
4528 * Performs the interruption of the current thread, if one has been requested.
4529 * Return the exception which needs to be thrown, if any.
4532 mono_thread_force_interruption_checkpoint_noraise (void)
4534 return mono_thread_interruption_checkpoint_request (TRUE);
4538 * mono_thread_get_and_clear_pending_exception:
4540 * Return any pending exceptions for the current thread and clear it as a side effect.
4543 mono_thread_get_and_clear_pending_exception (void)
4545 MonoInternalThread *thread = mono_thread_internal_current ();
4546 MonoThread *sys_thread = mono_thread_current ();
4548 /* The thread may already be stopping */
4552 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4553 return mono_thread_execute_interruption ();
4556 if (sys_thread->pending_exception) {
4557 MonoException *exc = sys_thread->pending_exception;
4559 sys_thread->pending_exception = NULL;
4567 * mono_set_pending_exception:
4569 * Set the pending exception of the current thread to EXC.
4570 * The exception will be thrown when execution returns to managed code.
4573 mono_set_pending_exception (MonoException *exc)
4575 MonoThread *thread = mono_thread_current ();
4577 /* The thread may already be stopping */
4581 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4583 mono_thread_request_interruption (FALSE);
4587 * mono_thread_interruption_request_flag:
4589 * Returns the address of a flag that will be non-zero if an interruption has
4590 * been requested for a thread. The thread to interrupt may not be the current
4591 * thread, so an additional call to mono_thread_interruption_requested() or
4592 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4595 gint32* mono_thread_interruption_request_flag ()
4597 return &thread_interruption_requested;
4601 mono_thread_init_apartment_state (void)
4604 MonoInternalThread* thread = mono_thread_internal_current ();
4606 /* Positive return value indicates success, either
4607 * S_OK if this is first CoInitialize call, or
4608 * S_FALSE if CoInitialize already called, but with same
4609 * threading model. A negative value indicates failure,
4610 * probably due to trying to change the threading model.
4612 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4613 ? COINIT_APARTMENTTHREADED
4614 : COINIT_MULTITHREADED) < 0) {
4615 thread->apartment_state = ThreadApartmentState_Unknown;
4621 mono_thread_cleanup_apartment_state (void)
4624 MonoInternalThread* thread = mono_thread_internal_current ();
4626 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4633 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4635 LOCK_THREAD (thread);
4636 thread->state |= state;
4637 UNLOCK_THREAD (thread);
4641 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4643 LOCK_THREAD (thread);
4644 thread->state &= ~state;
4645 UNLOCK_THREAD (thread);
4649 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4651 gboolean ret = FALSE;
4653 LOCK_THREAD (thread);
4655 if ((thread->state & test) != 0) {
4659 UNLOCK_THREAD (thread);
4664 static gboolean has_tls_get = FALSE;
4667 mono_runtime_set_has_tls_get (gboolean val)
4673 mono_runtime_has_tls_get (void)
4679 self_interrupt_thread (void *_unused)
4681 MonoThreadInfo *info = mono_thread_info_current ();
4682 MonoException *exc = mono_thread_execute_interruption ();
4683 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4684 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. */
4685 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4689 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4693 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4697 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4699 MonoJitInfo **dest = (MonoJitInfo **)data;
4705 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4707 MonoJitInfo *ji = NULL;
4712 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4713 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4714 * where we hold runtime locks.
4716 if (!mono_threads_is_coop_enabled ())
4717 mono_thread_info_set_is_async_context (TRUE);
4718 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4719 if (!mono_threads_is_coop_enabled ())
4720 mono_thread_info_set_is_async_context (FALSE);
4725 MonoInternalThread *thread;
4726 gboolean install_async_abort;
4727 MonoThreadInfoInterruptToken *interrupt_token;
4730 static SuspendThreadResult
4731 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4733 AbortThreadData *data = (AbortThreadData *)ud;
4734 MonoInternalThread *thread = data->thread;
4735 MonoJitInfo *ji = NULL;
4736 gboolean protected_wrapper;
4737 gboolean running_managed;
4739 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4740 return MonoResumeThread;
4742 /*someone is already interrupting it*/
4743 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4744 return MonoResumeThread;
4746 InterlockedIncrement (&thread_interruption_requested);
4748 ji = mono_thread_info_get_last_managed (info);
4749 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4750 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4752 if (!protected_wrapper && running_managed) {
4753 /*We are in managed code*/
4754 /*Set the thread to call */
4755 if (data->install_async_abort)
4756 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4757 return MonoResumeThread;
4760 * This will cause waits to be broken.
4761 * It will also prevent the thread from entering a wait, so if the thread returns
4762 * from the wait before it receives the abort signal, it will just spin in the wait
4763 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4766 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4768 return MonoResumeThread;
4773 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4775 AbortThreadData data;
4777 g_assert (thread != mono_thread_internal_current ());
4779 data.thread = thread;
4780 data.install_async_abort = install_async_abort;
4781 data.interrupt_token = NULL;
4783 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4784 if (data.interrupt_token)
4785 mono_thread_info_finish_interrupt (data.interrupt_token);
4786 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4790 self_abort_internal (void)
4794 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4795 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4797 exc = mono_thread_request_interruption (TRUE);
4799 mono_raise_exception (exc);
4801 mono_thread_info_self_interrupt ();
4805 MonoInternalThread *thread;
4807 MonoThreadInfoInterruptToken *interrupt_token;
4808 } SuspendThreadData;
4810 static SuspendThreadResult
4811 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4813 SuspendThreadData *data = (SuspendThreadData *)ud;
4814 MonoInternalThread *thread = data->thread;
4815 MonoJitInfo *ji = NULL;
4816 gboolean protected_wrapper;
4817 gboolean running_managed;
4819 ji = mono_thread_info_get_last_managed (info);
4820 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4821 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4823 if (running_managed && !protected_wrapper) {
4824 thread->state &= ~ThreadState_SuspendRequested;
4825 thread->state |= ThreadState_Suspended;
4826 return KeepSuspended;
4828 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4829 InterlockedIncrement (&thread_interruption_requested);
4830 if (data->interrupt)
4831 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4833 return MonoResumeThread;
4837 /* LOCKING: called with @thread synch_cs held, and releases it */
4839 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4841 SuspendThreadData data;
4843 g_assert (thread != mono_thread_internal_current ());
4845 data.thread = thread;
4846 data.interrupt = interrupt;
4847 data.interrupt_token = NULL;
4849 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4850 if (data.interrupt_token)
4851 mono_thread_info_finish_interrupt (data.interrupt_token);
4853 UNLOCK_THREAD (thread);
4856 /* LOCKING: called with @thread synch_cs held, and releases it */
4858 self_suspend_internal (void)
4860 MonoInternalThread *thread;
4862 thread = mono_thread_internal_current ();
4864 mono_thread_info_begin_self_suspend ();
4865 thread->state &= ~ThreadState_SuspendRequested;
4866 thread->state |= ThreadState_Suspended;
4868 UNLOCK_THREAD (thread);
4870 mono_thread_info_end_self_suspend ();
4874 * mono_thread_is_foreign:
4875 * @thread: the thread to query
4877 * This function allows one to determine if a thread was created by the mono runtime and has
4878 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4880 * Returns: TRUE if @thread was not created by the runtime.
4883 mono_thread_is_foreign (MonoThread *thread)
4885 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4886 return info->runtime_thread == FALSE;
4890 * mono_add_joinable_thread:
4892 * Add TID to the list of joinable threads.
4893 * LOCKING: Acquires the threads lock.
4896 mono_threads_add_joinable_thread (gpointer tid)
4900 * We cannot detach from threads because it causes problems like
4901 * 2fd16f60/r114307. So we collect them and join them when
4902 * we have time (in he finalizer thread).
4904 joinable_threads_lock ();
4905 if (!joinable_threads)
4906 joinable_threads = g_hash_table_new (NULL, NULL);
4907 g_hash_table_insert (joinable_threads, tid, tid);
4908 joinable_thread_count ++;
4909 joinable_threads_unlock ();
4911 mono_gc_finalize_notify ();
4916 * mono_threads_join_threads:
4918 * Join all joinable threads. This is called from the finalizer thread.
4919 * LOCKING: Acquires the threads lock.
4922 mono_threads_join_threads (void)
4925 GHashTableIter iter;
4932 if (!joinable_thread_count)
4936 joinable_threads_lock ();
4938 if (g_hash_table_size (joinable_threads)) {
4939 g_hash_table_iter_init (&iter, joinable_threads);
4940 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4941 thread = (pthread_t)tid;
4942 g_hash_table_remove (joinable_threads, key);
4943 joinable_thread_count --;
4946 joinable_threads_unlock ();
4948 if (thread != pthread_self ())
4949 /* This shouldn't block */
4950 pthread_join (thread, NULL);
4961 * Wait for thread TID to exit.
4962 * LOCKING: Acquires the threads lock.
4965 mono_thread_join (gpointer tid)
4969 gboolean found = FALSE;
4971 joinable_threads_lock ();
4972 if (!joinable_threads)
4973 joinable_threads = g_hash_table_new (NULL, NULL);
4974 if (g_hash_table_lookup (joinable_threads, tid)) {
4975 g_hash_table_remove (joinable_threads, tid);
4976 joinable_thread_count --;
4979 joinable_threads_unlock ();
4982 thread = (pthread_t)tid;
4983 pthread_join (thread, NULL);
4988 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4990 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4991 mono_thread_interruption_checkpoint ();
4994 static inline gboolean
4995 is_appdomainunloaded_exception (MonoClass *klass)
4997 return klass == mono_class_get_appdomain_unloaded_exception_class ();
5000 static inline gboolean
5001 is_threadabort_exception (MonoClass *klass)
5003 return klass == mono_defaults.threadabortexception_class;
5007 mono_thread_internal_unhandled_exception (MonoObject* exc)
5009 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5010 MonoClass *klass = exc->vtable->klass;
5011 if (is_threadabort_exception (klass)) {
5012 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5013 } else if (!is_appdomainunloaded_exception (klass)) {
5014 mono_unhandled_exception (exc);
5015 if (mono_environment_exitcode_get () == 1)
5022 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5024 mono_threads_get_thread_dump (out_threads, out_stack_traces);