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_native_thread_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, MonoError *error)
921 MonoInternalThread *internal;
922 StartInfo *start_info;
925 mono_error_init (error);
927 thread = create_thread_object (domain, error);
928 return_val_if_nok (error, NULL);
930 internal = create_internal_thread (error);
931 return_val_if_nok (error, NULL);
933 MONO_OBJECT_SETREF (thread, internal_thread, internal);
935 start_info = g_new0 (StartInfo, 1);
936 start_info->func = (guint32 (*)(void *))func;
937 start_info->obj = thread;
938 start_info->start_arg = arg;
940 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, error);
941 return_val_if_nok (error, NULL);
943 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
944 #ifndef MONO_CROSS_COMPILE
945 if (mono_check_corlib_version () == NULL)
946 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
953 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
956 if (!mono_thread_create_checked (domain, func, arg, &error))
957 mono_error_cleanup (&error);
961 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
963 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
967 mono_thread_attach (MonoDomain *domain)
970 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
971 mono_error_raise_exception (&error);
977 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
979 MonoThreadInfo *info;
980 MonoInternalThread *thread;
981 MonoThread *current_thread;
982 HANDLE thread_handle;
983 MonoNativeThreadId tid;
985 mono_error_init (error);
987 if ((thread = mono_thread_internal_current ())) {
988 if (domain != mono_domain_get ())
989 mono_domain_set (domain, TRUE);
990 /* Already attached */
991 return mono_thread_current ();
994 if (!mono_gc_register_thread (&domain)) {
995 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 ());
998 thread = create_internal_thread (error);
999 if (!mono_error_ok (error))
1002 thread_handle = mono_thread_info_open_handle ();
1003 g_assert (thread_handle);
1005 tid=mono_native_thread_id_get ();
1007 thread->handle = thread_handle;
1008 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
1009 thread->stack_ptr = &tid;
1011 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1013 info = mono_thread_info_current ();
1015 thread->thread_info = info;
1016 thread->small_id = info->small_id;
1018 current_thread = new_thread_with_internal (domain, thread, error);
1019 if (!mono_error_ok (error))
1022 if (!handle_store (current_thread, force_attach)) {
1023 /* Mono is shutting down, so just wait for the end */
1025 mono_thread_info_sleep (10000, NULL);
1028 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1030 SET_CURRENT_OBJECT (thread);
1031 mono_domain_set (domain, TRUE);
1033 thread_adjust_static_data (thread);
1035 init_root_domain_thread (thread, current_thread, error);
1036 return_val_if_nok (error, NULL);
1038 if (domain != mono_get_root_domain ())
1039 set_current_thread_for_domain (domain, thread, current_thread);
1042 if (mono_thread_attach_cb) {
1046 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1049 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1051 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1054 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1055 if (!info->tools_thread)
1056 // FIXME: Need a separate callback
1057 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1059 return current_thread;
1063 mono_thread_detach_internal (MonoInternalThread *thread)
1065 g_return_if_fail (thread != NULL);
1067 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1069 thread_cleanup (thread);
1071 SET_CURRENT_OBJECT (NULL);
1072 mono_domain_unset ();
1074 /* Don't need to CloseHandle this thread, even though we took a
1075 * reference in mono_thread_attach (), because the GC will do it
1076 * when the Thread object is finalised.
1081 mono_thread_detach (MonoThread *thread)
1084 mono_thread_detach_internal (thread->internal_thread);
1088 * mono_thread_detach_if_exiting:
1090 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1091 * This should be used at the end of embedding code which calls into managed code, and which
1092 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1095 mono_thread_detach_if_exiting (void)
1097 if (mono_thread_info_is_exiting ()) {
1098 MonoInternalThread *thread;
1100 thread = mono_thread_internal_current ();
1102 mono_thread_detach_internal (thread);
1103 mono_thread_info_detach ();
1111 MonoInternalThread *thread = mono_thread_internal_current ();
1113 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1115 thread_cleanup (thread);
1116 SET_CURRENT_OBJECT (NULL);
1117 mono_domain_unset ();
1119 /* we could add a callback here for embedders to use. */
1120 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1121 exit (mono_environment_exitcode_get ());
1122 mono_thread_info_exit ();
1126 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1129 MonoInternalThread *internal;
1131 internal = create_internal_thread (&error);
1132 mono_error_raise_exception (&error);
1134 internal->state = ThreadState_Unstarted;
1136 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1140 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1144 StartInfo *start_info;
1145 MonoInternalThread *internal;
1148 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1150 if (!this_obj->internal_thread)
1151 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1152 internal = this_obj->internal_thread;
1154 LOCK_THREAD (internal);
1156 if ((internal->state & ThreadState_Unstarted) == 0) {
1157 UNLOCK_THREAD (internal);
1158 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1162 if ((internal->state & ThreadState_Aborted) != 0) {
1163 UNLOCK_THREAD (internal);
1166 /* This is freed in start_wrapper */
1167 start_info = g_new0 (StartInfo, 1);
1168 start_info->func = NULL;
1169 start_info->start_arg = NULL;
1170 start_info->delegate = start;
1171 start_info->obj = this_obj;
1172 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1174 res = create_thread (this_obj, internal, start_info, FALSE, 0, &error);
1176 mono_error_cleanup (&error);
1177 UNLOCK_THREAD (internal);
1181 internal->state &= ~ThreadState_Unstarted;
1183 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1185 UNLOCK_THREAD (internal);
1186 return internal->handle;
1190 * This is called from the finalizer of the internal thread object.
1193 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1195 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1198 * Since threads keep a reference to their thread object while running, by the time this function is called,
1199 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1200 * when thread_cleanup () can be called after this.
1203 CloseHandle (thread);
1205 if (this_obj->synch_cs) {
1206 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1207 this_obj->synch_cs = NULL;
1208 mono_coop_mutex_destroy (synch_cs);
1212 if (this_obj->name) {
1213 void *name = this_obj->name;
1214 this_obj->name = NULL;
1220 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1223 MonoInternalThread *thread = mono_thread_internal_current ();
1225 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1227 mono_thread_current_check_pending_interrupt ();
1230 gboolean alerted = FALSE;
1232 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1234 res = mono_thread_info_sleep (ms, &alerted);
1236 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1239 MonoException* exc = mono_thread_execute_interruption ();
1241 mono_raise_exception (exc);
1253 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1258 ves_icall_System_Threading_Thread_GetDomainID (void)
1260 return mono_domain_get()->domain_id;
1264 ves_icall_System_Threading_Thread_Yield (void)
1266 return mono_thread_info_yield ();
1270 * mono_thread_get_name:
1272 * Return the name of the thread. NAME_LEN is set to the length of the name.
1273 * Return NULL if the thread has no name. The returned memory is owned by the
1277 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1281 LOCK_THREAD (this_obj);
1283 if (!this_obj->name) {
1287 *name_len = this_obj->name_len;
1288 res = g_new (gunichar2, this_obj->name_len);
1289 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1292 UNLOCK_THREAD (this_obj);
1298 * mono_thread_get_name_utf8:
1300 * Return the name of the thread in UTF-8.
1301 * Return NULL if the thread has no name.
1302 * The returned memory is owned by the caller.
1305 mono_thread_get_name_utf8 (MonoThread *thread)
1310 MonoInternalThread *internal = thread->internal_thread;
1311 if (internal == NULL)
1314 LOCK_THREAD (internal);
1316 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1318 UNLOCK_THREAD (internal);
1324 * mono_thread_get_managed_id:
1326 * Return the Thread.ManagedThreadId value of `thread`.
1327 * Returns -1 if `thread` is NULL.
1330 mono_thread_get_managed_id (MonoThread *thread)
1335 MonoInternalThread *internal = thread->internal_thread;
1336 if (internal == NULL)
1339 int32_t id = internal->managed_id;
1345 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1350 mono_error_init (&error);
1352 LOCK_THREAD (this_obj);
1354 if (!this_obj->name)
1357 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1359 UNLOCK_THREAD (this_obj);
1361 mono_error_raise_exception (&error);
1367 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed, MonoError *error)
1369 LOCK_THREAD (this_obj);
1371 mono_error_init (error);
1373 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1374 UNLOCK_THREAD (this_obj);
1376 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1379 if (this_obj->name) {
1380 g_free (this_obj->name);
1381 this_obj->name_len = 0;
1384 this_obj->name = g_new (gunichar2, mono_string_length (name));
1385 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1386 this_obj->name_len = mono_string_length (name);
1389 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1392 this_obj->name = NULL;
1395 UNLOCK_THREAD (this_obj);
1397 if (this_obj->name && this_obj->tid) {
1398 char *tname = mono_string_to_utf8 (name);
1399 mono_profiler_thread_name (this_obj->tid, tname);
1400 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1406 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1409 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1410 mono_error_set_pending_exception (&error);
1414 * ves_icall_System_Threading_Thread_GetPriority_internal:
1415 * @param this_obj: The MonoInternalThread on which to operate.
1417 * Gets the priority of the given thread.
1418 * @return: The priority of the given thread.
1421 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1424 MonoInternalThread *internal = this_obj->internal_thread;
1426 LOCK_THREAD (internal);
1427 priority = GetThreadPriority (internal->handle) + 2;
1428 UNLOCK_THREAD (internal);
1433 * ves_icall_System_Threading_Thread_SetPriority_internal:
1434 * @param this_obj: The MonoInternalThread on which to operate.
1435 * @param priority: The priority to set.
1437 * Sets the priority of the given thread.
1440 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1442 MonoInternalThread *internal = this_obj->internal_thread;
1444 LOCK_THREAD (internal);
1445 SetThreadPriority (internal->handle, priority - 2);
1446 UNLOCK_THREAD (internal);
1449 /* If the array is already in the requested domain, we just return it,
1450 otherwise we return a copy in that domain. */
1452 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1456 mono_error_init (error);
1460 if (mono_object_domain (arr) == domain)
1463 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1464 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1469 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1472 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1473 mono_error_set_pending_exception (&error);
1478 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1481 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1482 mono_error_set_pending_exception (&error);
1487 mono_thread_current (void)
1490 MonoDomain *domain = mono_domain_get ();
1491 MonoInternalThread *internal = mono_thread_internal_current ();
1492 MonoThread **current_thread_ptr;
1494 g_assert (internal);
1495 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1497 if (!*current_thread_ptr) {
1498 g_assert (domain != mono_get_root_domain ());
1499 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1500 mono_error_raise_exception (&error); /* FIXME don't raise here */
1502 return *current_thread_ptr;
1505 /* Return the thread object belonging to INTERNAL in the current domain */
1507 mono_thread_current_for_thread (MonoInternalThread *internal)
1510 MonoDomain *domain = mono_domain_get ();
1511 MonoThread **current_thread_ptr;
1513 g_assert (internal);
1514 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1516 if (!*current_thread_ptr) {
1517 g_assert (domain != mono_get_root_domain ());
1518 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1519 mono_error_raise_exception (&error); /* FIXME don't raise here */
1521 return *current_thread_ptr;
1525 mono_thread_internal_current (void)
1527 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1528 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1533 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1535 MonoInternalThread *thread = this_obj->internal_thread;
1536 HANDLE handle = thread->handle;
1537 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1540 mono_thread_current_check_pending_interrupt ();
1542 LOCK_THREAD (thread);
1544 if ((thread->state & ThreadState_Unstarted) != 0) {
1545 UNLOCK_THREAD (thread);
1547 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1551 UNLOCK_THREAD (thread);
1556 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1558 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1560 MONO_PREPARE_BLOCKING;
1561 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1562 MONO_FINISH_BLOCKING;
1564 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1566 if(ret==WAIT_OBJECT_0) {
1567 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1572 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1578 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1586 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1588 MONO_PREPARE_BLOCKING;
1590 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1592 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1593 MONO_FINISH_BLOCKING;
1595 if (ret != WAIT_IO_COMPLETION)
1598 exc = mono_thread_execute_interruption ();
1600 mono_raise_exception (exc);
1605 /* Re-calculate ms according to the time passed */
1606 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1607 if (diff_ms >= ms) {
1611 wait = ms - diff_ms;
1617 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1623 MonoObject *waitHandle;
1624 MonoInternalThread *thread = mono_thread_internal_current ();
1626 /* Do this WaitSleepJoin check before creating objects */
1627 mono_thread_current_check_pending_interrupt ();
1629 /* We fail in managed if the array has more than 64 elements */
1630 numhandles = (guint32)mono_array_length(mono_handles);
1631 handles = g_new0(HANDLE, numhandles);
1633 for(i = 0; i < numhandles; i++) {
1634 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1635 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1642 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1644 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1646 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1650 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1651 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1654 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1656 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1657 uintptr_t numhandles;
1660 MonoObject *waitHandle;
1661 MonoInternalThread *thread = mono_thread_internal_current ();
1663 /* Do this WaitSleepJoin check before creating objects */
1664 mono_thread_current_check_pending_interrupt ();
1666 numhandles = mono_array_length(mono_handles);
1667 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1670 for(i = 0; i < numhandles; i++) {
1671 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1672 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1679 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1681 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1683 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1685 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1688 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1690 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1691 return ret - WAIT_OBJECT_0;
1693 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1694 return ret - WAIT_ABANDONED_0;
1697 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1698 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1702 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1705 MonoInternalThread *thread = mono_thread_internal_current ();
1707 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1713 mono_thread_current_check_pending_interrupt ();
1715 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1717 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1719 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1721 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1722 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1726 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1729 MonoInternalThread *thread = mono_thread_internal_current ();
1734 mono_thread_current_check_pending_interrupt ();
1736 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1738 MONO_PREPARE_BLOCKING;
1739 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1740 MONO_FINISH_BLOCKING;
1742 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1744 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1745 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1748 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1755 mutex = CreateMutex (NULL, owned, NULL);
1757 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1759 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1767 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1768 return(ReleaseMutex (handle));
1771 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1777 *error = ERROR_SUCCESS;
1779 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1781 *error = GetLastError ();
1788 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1795 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1797 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1798 mono_string_chars (name));
1800 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1808 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1812 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1817 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1821 *error = ERROR_SUCCESS;
1823 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1825 *error = GetLastError ();
1831 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1838 event = CreateEvent (NULL, manual, initial, NULL);
1840 event = CreateEvent (NULL, manual, initial,
1841 mono_string_chars (name));
1843 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1851 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1852 return (SetEvent(handle));
1855 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1856 return (ResetEvent(handle));
1860 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1861 CloseHandle (handle);
1864 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1870 *error = ERROR_SUCCESS;
1872 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1874 *error = GetLastError ();
1880 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1882 return InterlockedIncrement (location);
1885 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1887 #if SIZEOF_VOID_P == 4
1888 if (G_UNLIKELY ((size_t)location & 0x7)) {
1890 mono_interlocked_lock ();
1893 mono_interlocked_unlock ();
1897 return InterlockedIncrement64 (location);
1900 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1902 return InterlockedDecrement(location);
1905 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1907 #if SIZEOF_VOID_P == 4
1908 if (G_UNLIKELY ((size_t)location & 0x7)) {
1910 mono_interlocked_lock ();
1913 mono_interlocked_unlock ();
1917 return InterlockedDecrement64 (location);
1920 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1922 return InterlockedExchange(location, value);
1925 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1928 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1929 mono_gc_wbarrier_generic_nostore (location);
1933 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1935 return InterlockedExchangePointer(location, value);
1938 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1940 IntFloatUnion val, ret;
1943 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1949 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1951 #if SIZEOF_VOID_P == 4
1952 if (G_UNLIKELY ((size_t)location & 0x7)) {
1954 mono_interlocked_lock ();
1957 mono_interlocked_unlock ();
1961 return InterlockedExchange64 (location, value);
1965 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1967 LongDoubleUnion val, ret;
1970 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1975 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1977 return InterlockedCompareExchange(location, value, comparand);
1980 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1982 gint32 r = InterlockedCompareExchange(location, value, comparand);
1983 *success = r == comparand;
1987 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1990 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1991 mono_gc_wbarrier_generic_nostore (location);
1995 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1997 return InterlockedCompareExchangePointer(location, value, comparand);
2000 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2002 IntFloatUnion val, ret, cmp;
2005 cmp.fval = comparand;
2006 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2012 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2014 #if SIZEOF_VOID_P == 8
2015 LongDoubleUnion val, comp, ret;
2018 comp.fval = comparand;
2019 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2025 mono_interlocked_lock ();
2027 if (old == comparand)
2029 mono_interlocked_unlock ();
2036 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2038 #if SIZEOF_VOID_P == 4
2039 if (G_UNLIKELY ((size_t)location & 0x7)) {
2041 mono_interlocked_lock ();
2043 if (old == comparand)
2045 mono_interlocked_unlock ();
2049 return InterlockedCompareExchange64 (location, value, comparand);
2053 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2056 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2057 mono_gc_wbarrier_generic_nostore (location);
2062 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2065 MONO_CHECK_NULL (location, NULL);
2066 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2067 mono_gc_wbarrier_generic_nostore (location);
2072 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2074 return InterlockedAdd (location, value);
2078 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2080 #if SIZEOF_VOID_P == 4
2081 if (G_UNLIKELY ((size_t)location & 0x7)) {
2083 mono_interlocked_lock ();
2086 mono_interlocked_unlock ();
2090 return InterlockedAdd64 (location, value);
2094 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2096 #if SIZEOF_VOID_P == 4
2097 if (G_UNLIKELY ((size_t)location & 0x7)) {
2099 mono_interlocked_lock ();
2101 mono_interlocked_unlock ();
2105 return InterlockedRead64 (location);
2109 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2111 mono_memory_barrier ();
2115 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2117 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2119 if (state & ThreadState_Background) {
2120 /* If the thread changes the background mode, the main thread has to
2121 * be notified, since it has to rebuild the list of threads to
2124 SetEvent (background_change_event);
2129 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2131 mono_thread_set_state (this_obj, (MonoThreadState)state);
2133 if (state & ThreadState_Background) {
2134 /* If the thread changes the background mode, the main thread has to
2135 * be notified, since it has to rebuild the list of threads to
2138 SetEvent (background_change_event);
2143 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2147 LOCK_THREAD (this_obj);
2149 state = this_obj->state;
2151 UNLOCK_THREAD (this_obj);
2156 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2158 MonoInternalThread *current;
2160 MonoInternalThread *thread = this_obj->internal_thread;
2162 LOCK_THREAD (thread);
2164 current = mono_thread_internal_current ();
2166 thread->thread_interrupt_requested = TRUE;
2167 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2169 UNLOCK_THREAD (thread);
2172 async_abort_internal (thread, FALSE);
2176 void mono_thread_current_check_pending_interrupt ()
2178 MonoInternalThread *thread = mono_thread_internal_current ();
2179 gboolean throw_ = FALSE;
2181 LOCK_THREAD (thread);
2183 if (thread->thread_interrupt_requested) {
2185 thread->thread_interrupt_requested = FALSE;
2188 UNLOCK_THREAD (thread);
2191 mono_raise_exception (mono_get_exception_thread_interrupted ());
2196 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2198 LOCK_THREAD (thread);
2200 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2201 (thread->state & ThreadState_StopRequested) != 0 ||
2202 (thread->state & ThreadState_Stopped) != 0)
2204 UNLOCK_THREAD (thread);
2208 if ((thread->state & ThreadState_Unstarted) != 0) {
2209 thread->state |= ThreadState_Aborted;
2210 UNLOCK_THREAD (thread);
2214 thread->state |= ThreadState_AbortRequested;
2215 if (thread->abort_state_handle)
2216 mono_gchandle_free (thread->abort_state_handle);
2218 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2219 g_assert (thread->abort_state_handle);
2221 thread->abort_state_handle = 0;
2223 thread->abort_exc = NULL;
2225 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));
2227 /* During shutdown, we can't wait for other threads */
2229 /* Make sure the thread is awake */
2230 mono_thread_resume (thread);
2232 UNLOCK_THREAD (thread);
2234 if (thread == mono_thread_internal_current ())
2235 self_abort_internal ();
2237 async_abort_internal (thread, TRUE);
2241 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2243 MonoInternalThread *thread = mono_thread_internal_current ();
2244 gboolean was_aborting;
2246 LOCK_THREAD (thread);
2247 was_aborting = thread->state & ThreadState_AbortRequested;
2248 thread->state &= ~ThreadState_AbortRequested;
2249 UNLOCK_THREAD (thread);
2251 if (!was_aborting) {
2252 const char *msg = "Unable to reset abort because no abort was requested";
2253 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2256 thread->abort_exc = NULL;
2257 if (thread->abort_state_handle) {
2258 mono_gchandle_free (thread->abort_state_handle);
2259 /* This is actually not necessary - the handle
2260 only counts if the exception is set */
2261 thread->abort_state_handle = 0;
2266 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2268 LOCK_THREAD (thread);
2270 thread->state &= ~ThreadState_AbortRequested;
2272 if (thread->abort_exc) {
2273 thread->abort_exc = NULL;
2274 if (thread->abort_state_handle) {
2275 mono_gchandle_free (thread->abort_state_handle);
2276 /* This is actually not necessary - the handle
2277 only counts if the exception is set */
2278 thread->abort_state_handle = 0;
2282 UNLOCK_THREAD (thread);
2286 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2289 MonoInternalThread *thread = this_obj->internal_thread;
2290 MonoObject *state, *deserialized = NULL;
2293 if (!thread->abort_state_handle)
2296 state = mono_gchandle_get_target (thread->abort_state_handle);
2299 domain = mono_domain_get ();
2300 if (mono_object_domain (state) == domain)
2303 deserialized = mono_object_xdomain_representation (state, domain, &error);
2305 if (!deserialized) {
2306 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2307 if (!is_ok (&error)) {
2308 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2309 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2311 mono_set_pending_exception (invalid_op_exc);
2315 return deserialized;
2319 mono_thread_suspend (MonoInternalThread *thread)
2321 LOCK_THREAD (thread);
2323 if ((thread->state & ThreadState_Unstarted) != 0 ||
2324 (thread->state & ThreadState_Aborted) != 0 ||
2325 (thread->state & ThreadState_Stopped) != 0)
2327 UNLOCK_THREAD (thread);
2331 if ((thread->state & ThreadState_Suspended) != 0 ||
2332 (thread->state & ThreadState_SuspendRequested) != 0 ||
2333 (thread->state & ThreadState_StopRequested) != 0)
2335 UNLOCK_THREAD (thread);
2339 thread->state |= ThreadState_SuspendRequested;
2341 if (thread == mono_thread_internal_current ()) {
2342 /* calls UNLOCK_THREAD (thread) */
2343 self_suspend_internal ();
2345 /* calls UNLOCK_THREAD (thread) */
2346 async_suspend_internal (thread, FALSE);
2353 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2355 if (!mono_thread_suspend (this_obj->internal_thread)) {
2356 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2361 /* LOCKING: LOCK_THREAD(thread) must be held */
2363 mono_thread_resume (MonoInternalThread *thread)
2365 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2366 thread->state &= ~ThreadState_SuspendRequested;
2370 if ((thread->state & ThreadState_Suspended) == 0 ||
2371 (thread->state & ThreadState_Unstarted) != 0 ||
2372 (thread->state & ThreadState_Aborted) != 0 ||
2373 (thread->state & ThreadState_Stopped) != 0)
2378 UNLOCK_THREAD (thread);
2380 /* Awake the thread */
2381 if (!mono_thread_info_resume (thread_get_tid (thread)))
2384 LOCK_THREAD (thread);
2386 thread->state &= ~ThreadState_Suspended;
2392 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2394 if (!thread->internal_thread) {
2395 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2397 LOCK_THREAD (thread->internal_thread);
2398 if (!mono_thread_resume (thread->internal_thread))
2399 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2400 UNLOCK_THREAD (thread->internal_thread);
2405 mono_threads_is_critical_method (MonoMethod *method)
2407 switch (method->wrapper_type) {
2408 case MONO_WRAPPER_RUNTIME_INVOKE:
2409 case MONO_WRAPPER_XDOMAIN_INVOKE:
2410 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2417 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2422 if (mono_threads_is_critical_method (m)) {
2423 *((gboolean*)data) = TRUE;
2430 is_running_protected_wrapper (void)
2432 gboolean found = FALSE;
2433 mono_stack_walk (find_wrapper, &found);
2437 void mono_thread_internal_stop (MonoInternalThread *thread)
2439 LOCK_THREAD (thread);
2441 if ((thread->state & ThreadState_StopRequested) != 0 ||
2442 (thread->state & ThreadState_Stopped) != 0)
2444 UNLOCK_THREAD (thread);
2448 /* Make sure the thread is awake */
2449 mono_thread_resume (thread);
2451 thread->state |= ThreadState_StopRequested;
2452 thread->state &= ~ThreadState_AbortRequested;
2454 UNLOCK_THREAD (thread);
2456 if (thread == mono_thread_internal_current ())
2457 self_abort_internal ();
2459 async_abort_internal (thread, TRUE);
2462 void mono_thread_stop (MonoThread *thread)
2464 mono_thread_internal_stop (thread->internal_thread);
2468 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2470 gint8 tmp = *(volatile gint8 *)ptr;
2471 mono_memory_barrier ();
2476 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2478 gint16 tmp = *(volatile gint16 *)ptr;
2479 mono_memory_barrier ();
2484 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2486 gint32 tmp = *(volatile gint32 *)ptr;
2487 mono_memory_barrier ();
2492 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2494 gint64 tmp = *(volatile gint64 *)ptr;
2495 mono_memory_barrier ();
2500 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2502 volatile void *tmp = *(volatile void **)ptr;
2503 mono_memory_barrier ();
2504 return (void *) tmp;
2508 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2510 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2511 mono_memory_barrier ();
2512 return (MonoObject *) tmp;
2516 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2518 double tmp = *(volatile double *)ptr;
2519 mono_memory_barrier ();
2524 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2526 float tmp = *(volatile float *)ptr;
2527 mono_memory_barrier ();
2532 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2534 return InterlockedRead8 ((volatile gint8 *)ptr);
2538 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2540 return InterlockedRead16 ((volatile gint16 *)ptr);
2544 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2546 return InterlockedRead ((volatile gint32 *)ptr);
2550 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2552 #if SIZEOF_VOID_P == 4
2553 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2555 mono_interlocked_lock ();
2556 val = *(gint64*)ptr;
2557 mono_interlocked_unlock ();
2561 return InterlockedRead64 ((volatile gint64 *)ptr);
2565 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2567 return InterlockedReadPointer ((volatile gpointer *)ptr);
2571 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2575 #if SIZEOF_VOID_P == 4
2576 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2578 mono_interlocked_lock ();
2579 val = *(double*)ptr;
2580 mono_interlocked_unlock ();
2585 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2591 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2595 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2601 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2603 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2607 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2609 mono_memory_barrier ();
2610 *(volatile gint8 *)ptr = value;
2614 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2616 mono_memory_barrier ();
2617 *(volatile gint16 *)ptr = value;
2621 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2623 mono_memory_barrier ();
2624 *(volatile gint32 *)ptr = value;
2628 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2630 mono_memory_barrier ();
2631 *(volatile gint64 *)ptr = value;
2635 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2637 mono_memory_barrier ();
2638 *(volatile void **)ptr = value;
2642 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2644 mono_memory_barrier ();
2645 mono_gc_wbarrier_generic_store (ptr, value);
2649 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2651 mono_memory_barrier ();
2652 *(volatile double *)ptr = value;
2656 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2658 mono_memory_barrier ();
2659 *(volatile float *)ptr = value;
2663 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2665 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2669 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2671 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2675 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2677 InterlockedWrite ((volatile gint32 *)ptr, value);
2681 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2683 #if SIZEOF_VOID_P == 4
2684 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2685 mono_interlocked_lock ();
2686 *(gint64*)ptr = value;
2687 mono_interlocked_unlock ();
2692 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2696 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2698 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2702 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2706 #if SIZEOF_VOID_P == 4
2707 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2708 mono_interlocked_lock ();
2709 *(double*)ptr = value;
2710 mono_interlocked_unlock ();
2717 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2721 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2727 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2731 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2733 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2737 free_context (void *user_data)
2739 ContextStaticData *data = user_data;
2741 mono_threads_lock ();
2744 * There is no guarantee that, by the point this reference queue callback
2745 * has been invoked, the GC handle associated with the object will fail to
2746 * resolve as one might expect. So if we don't free and remove the GC
2747 * handle here, free_context_static_data_helper () could end up resolving
2748 * a GC handle to an actually-dead context which would contain a pointer
2749 * to an already-freed static data segment, resulting in a crash when
2752 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2754 mono_threads_unlock ();
2756 mono_gchandle_free (data->gc_handle);
2757 mono_free_static_data (data->static_data);
2762 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2764 mono_threads_lock ();
2766 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2769 contexts = g_hash_table_new (NULL, NULL);
2772 context_queue = mono_gc_reference_queue_new (free_context);
2774 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2775 g_hash_table_insert (contexts, gch, gch);
2778 * We use this intermediate structure to contain a duplicate pointer to
2779 * the static data because we can't rely on being able to resolve the GC
2780 * handle in the reference queue callback.
2782 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2783 data->gc_handle = GPOINTER_TO_UINT (gch);
2786 context_adjust_static_data (ctx);
2787 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2789 mono_threads_unlock ();
2791 mono_profiler_context_loaded (ctx);
2795 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2798 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2799 * cleanup in exceptional circumstances, we don't actually do any
2800 * cleanup work here. We instead do this via a reference queue.
2803 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2805 mono_profiler_context_unloaded (ctx);
2809 mono_thread_init_tls (void)
2811 MONO_FAST_TLS_INIT (tls_current_object);
2812 mono_native_tls_alloc (¤t_object_key, NULL);
2815 void mono_thread_init (MonoThreadStartCB start_cb,
2816 MonoThreadAttachCB attach_cb)
2818 mono_coop_mutex_init_recursive (&threads_mutex);
2820 mono_os_mutex_init_recursive(&interlocked_mutex);
2821 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2823 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2824 g_assert(background_change_event != NULL);
2826 mono_init_static_data_info (&thread_static_info);
2827 mono_init_static_data_info (&context_static_info);
2829 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2831 mono_thread_start_cb = start_cb;
2832 mono_thread_attach_cb = attach_cb;
2834 /* Get a pseudo handle to the current process. This is just a
2835 * kludge so that wapi can build a process handle if needed.
2836 * As a pseudo handle is returned, we don't need to clean
2839 GetCurrentProcess ();
2842 void mono_thread_cleanup (void)
2844 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2845 MonoThreadInfo *info;
2847 /* The main thread must abandon any held mutexes (particularly
2848 * important for named mutexes as they are shared across
2849 * processes, see bug 74680.) This will happen when the
2850 * thread exits, but if it's not running in a subthread it
2851 * won't exit in time.
2853 info = mono_thread_info_current ();
2854 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2858 /* This stuff needs more testing, it seems one of these
2859 * critical sections can be locked when mono_thread_cleanup is
2862 mono_coop_mutex_destroy (&threads_mutex);
2863 mono_os_mutex_destroy (&interlocked_mutex);
2864 mono_os_mutex_destroy (&delayed_free_table_mutex);
2865 mono_os_mutex_destroy (&small_id_mutex);
2866 CloseHandle (background_change_event);
2869 mono_native_tls_free (current_object_key);
2873 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2875 mono_thread_cleanup_fn = func;
2879 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2881 thread->internal_thread->manage_callback = func;
2885 static void print_tids (gpointer key, gpointer value, gpointer user)
2887 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2888 * sizeof(uint) and a cast to uint would overflow
2890 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2891 * print this as a pointer.
2893 g_message ("Waiting for: %p", key);
2898 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2899 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2903 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2907 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2909 MONO_PREPARE_BLOCKING;
2910 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2911 MONO_FINISH_BLOCKING;
2913 if(ret==WAIT_FAILED) {
2914 /* See the comment in build_wait_tids() */
2915 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2919 for(i=0; i<wait->num; i++)
2920 CloseHandle (wait->handles[i]);
2922 if (ret == WAIT_TIMEOUT)
2925 for(i=0; i<wait->num; i++) {
2926 gsize tid = wait->threads[i]->tid;
2929 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2930 * it can still run io-layer etc. code. So wait for it to really exit.
2931 * FIXME: This won't join threads which are not in the joinable_hash yet.
2933 mono_thread_join ((gpointer)tid);
2935 mono_threads_lock ();
2936 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2937 /* This thread must have been killed, because
2938 * it hasn't cleaned itself up. (It's just
2939 * possible that the thread exited before the
2940 * parent thread had a chance to store the
2941 * handle, and now there is another pointer to
2942 * the already-exited thread stored. In this
2943 * case, we'll just get two
2944 * mono_profiler_thread_end() calls for the
2948 mono_threads_unlock ();
2949 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2950 thread_cleanup (wait->threads[i]);
2952 mono_threads_unlock ();
2957 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2959 guint32 i, ret, count;
2961 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2963 /* Add the thread state change event, so it wakes up if a thread changes
2964 * to background mode.
2967 if (count < MAXIMUM_WAIT_OBJECTS) {
2968 wait->handles [count] = background_change_event;
2972 MONO_PREPARE_BLOCKING;
2973 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2974 MONO_FINISH_BLOCKING;
2976 if(ret==WAIT_FAILED) {
2977 /* See the comment in build_wait_tids() */
2978 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2982 for(i=0; i<wait->num; i++)
2983 CloseHandle (wait->handles[i]);
2985 if (ret == WAIT_TIMEOUT)
2988 if (ret < wait->num) {
2989 gsize tid = wait->threads[ret]->tid;
2990 mono_threads_lock ();
2991 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2992 /* See comment in wait_for_tids about thread cleanup */
2993 mono_threads_unlock ();
2994 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2995 thread_cleanup (wait->threads [ret]);
2997 mono_threads_unlock ();
3001 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3003 struct wait_data *wait=(struct wait_data *)user;
3005 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
3007 MonoInternalThread *thread=(MonoInternalThread *)value;
3009 /* Ignore background threads, we abort them later */
3010 /* Do not lock here since it is not needed and the caller holds threads_lock */
3011 if (thread->state & ThreadState_Background) {
3012 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3013 return; /* just leave, ignore */
3016 if (mono_gc_is_finalizer_internal_thread (thread)) {
3017 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3021 if (thread == mono_thread_internal_current ()) {
3022 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3026 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3027 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3031 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3032 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3036 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3037 if (handle == NULL) {
3038 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3042 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3043 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3044 wait->handles[wait->num]=handle;
3045 wait->threads[wait->num]=thread;
3048 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3050 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3055 /* Just ignore the rest, we can't do anything with
3062 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3064 struct wait_data *wait=(struct wait_data *)user;
3065 MonoNativeThreadId self = mono_native_thread_id_get ();
3066 MonoInternalThread *thread = (MonoInternalThread *)value;
3069 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3072 /* The finalizer thread is not a background thread */
3073 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3074 && (thread->state & ThreadState_Background) != 0
3075 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3077 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3081 /* printf ("A: %d\n", wait->num); */
3082 wait->handles[wait->num]=thread->handle;
3083 wait->threads[wait->num]=thread;
3086 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3087 mono_thread_internal_stop (thread);
3091 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3092 && !mono_gc_is_finalizer_internal_thread (thread);
3096 * mono_threads_set_shutting_down:
3098 * Is called by a thread that wants to shut down Mono. If the runtime is already
3099 * shutting down, the calling thread is suspended/stopped, and this function never
3103 mono_threads_set_shutting_down (void)
3105 MonoInternalThread *current_thread = mono_thread_internal_current ();
3107 mono_threads_lock ();
3109 if (shutting_down) {
3110 mono_threads_unlock ();
3112 /* Make sure we're properly suspended/stopped */
3114 LOCK_THREAD (current_thread);
3116 if ((current_thread->state & ThreadState_SuspendRequested) ||
3117 (current_thread->state & ThreadState_AbortRequested) ||
3118 (current_thread->state & ThreadState_StopRequested)) {
3119 UNLOCK_THREAD (current_thread);
3120 mono_thread_execute_interruption ();
3122 current_thread->state |= ThreadState_Stopped;
3123 UNLOCK_THREAD (current_thread);
3126 /*since we're killing the thread, unset the current domain.*/
3127 mono_domain_unset ();
3129 /* Wake up other threads potentially waiting for us */
3130 mono_thread_info_exit ();
3132 shutting_down = TRUE;
3134 /* Not really a background state change, but this will
3135 * interrupt the main thread if it is waiting for all
3136 * the other threads.
3138 SetEvent (background_change_event);
3140 mono_threads_unlock ();
3144 void mono_thread_manage (void)
3146 struct wait_data wait_data;
3147 struct wait_data *wait = &wait_data;
3149 memset (wait, 0, sizeof (struct wait_data));
3150 /* join each thread that's still running */
3151 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3153 mono_threads_lock ();
3155 THREAD_DEBUG (g_message("%s: No threads", __func__));
3156 mono_threads_unlock ();
3159 mono_threads_unlock ();
3162 mono_threads_lock ();
3163 if (shutting_down) {
3164 /* somebody else is shutting down */
3165 mono_threads_unlock ();
3168 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3169 mono_g_hash_table_foreach (threads, print_tids, NULL));
3171 ResetEvent (background_change_event);
3173 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3174 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3175 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3176 mono_threads_unlock ();
3178 /* Something to wait for */
3179 wait_for_tids_or_state_change (wait, INFINITE);
3181 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3182 } while(wait->num>0);
3184 /* Mono is shutting down, so just wait for the end */
3185 if (!mono_runtime_try_shutdown ()) {
3186 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3187 mono_thread_suspend (mono_thread_internal_current ());
3188 mono_thread_execute_interruption ();
3192 * Remove everything but the finalizer thread and self.
3193 * Also abort all the background threads
3196 mono_threads_lock ();
3199 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3200 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3201 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3203 mono_threads_unlock ();
3205 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3207 /* Something to wait for */
3208 wait_for_tids (wait, INFINITE);
3210 } while (wait->num > 0);
3213 * give the subthreads a chance to really quit (this is mainly needed
3214 * to get correct user and system times from getrusage/wait/time(1)).
3215 * This could be removed if we avoid pthread_detach() and use pthread_join().
3217 mono_thread_info_yield ();
3221 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3223 MonoInternalThread *thread = (MonoInternalThread*)value;
3224 struct wait_data *wait = (struct wait_data*)user_data;
3228 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3230 * This needs no locking.
3232 if ((thread->state & ThreadState_Suspended) != 0 ||
3233 (thread->state & ThreadState_Stopped) != 0)
3236 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3237 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3241 wait->handles [wait->num] = handle;
3242 wait->threads [wait->num] = thread;
3248 * mono_thread_suspend_all_other_threads:
3250 * Suspend all managed threads except the finalizer thread and this thread. It is
3251 * not possible to resume them later.
3253 void mono_thread_suspend_all_other_threads (void)
3255 struct wait_data wait_data;
3256 struct wait_data *wait = &wait_data;
3258 MonoNativeThreadId self = mono_native_thread_id_get ();
3259 guint32 eventidx = 0;
3260 gboolean starting, finished;
3262 memset (wait, 0, sizeof (struct wait_data));
3264 * The other threads could be in an arbitrary state at this point, i.e.
3265 * they could be starting up, shutting down etc. This means that there could be
3266 * threads which are not even in the threads hash table yet.
3270 * First we set a barrier which will be checked by all threads before they
3271 * are added to the threads hash table, and they will exit if the flag is set.
3272 * This ensures that no threads could be added to the hash later.
3273 * We will use shutting_down as the barrier for now.
3275 g_assert (shutting_down);
3278 * We make multiple calls to WaitForMultipleObjects since:
3279 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3280 * - some threads could exit without becoming suspended
3285 * Make a copy of the hashtable since we can't do anything with
3286 * threads while threads_mutex is held.
3289 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3290 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3291 mono_threads_lock ();
3292 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3293 mono_threads_unlock ();
3296 /* Get the suspended events that we'll be waiting for */
3297 for (i = 0; i < wait->num; ++i) {
3298 MonoInternalThread *thread = wait->threads [i];
3300 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3301 || mono_gc_is_finalizer_internal_thread (thread)
3302 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3304 //CloseHandle (wait->handles [i]);
3305 wait->threads [i] = NULL; /* ignore this thread in next loop */
3309 LOCK_THREAD (thread);
3311 if ((thread->state & ThreadState_Suspended) != 0 ||
3312 (thread->state & ThreadState_StopRequested) != 0 ||
3313 (thread->state & ThreadState_Stopped) != 0) {
3314 UNLOCK_THREAD (thread);
3315 CloseHandle (wait->handles [i]);
3316 wait->threads [i] = NULL; /* ignore this thread in next loop */
3322 /* Convert abort requests into suspend requests */
3323 if ((thread->state & ThreadState_AbortRequested) != 0)
3324 thread->state &= ~ThreadState_AbortRequested;
3326 thread->state |= ThreadState_SuspendRequested;
3328 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3329 async_suspend_internal (thread, TRUE);
3331 if (eventidx <= 0) {
3333 * If there are threads which are starting up, we wait until they
3334 * are suspended when they try to register in the threads hash.
3335 * This is guaranteed to finish, since the threads which can create new
3336 * threads get suspended after a while.
3337 * FIXME: The finalizer thread can still create new threads.
3339 mono_threads_lock ();
3340 if (threads_starting_up)
3341 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3344 mono_threads_unlock ();
3346 mono_thread_info_sleep (100, NULL);
3354 MonoInternalThread *thread;
3355 MonoStackFrameInfo *frames;
3356 int nframes, max_frames;
3357 int nthreads, max_threads;
3358 MonoInternalThread **threads;
3359 } ThreadDumpUserData;
3361 static gboolean thread_dump_requested;
3363 /* This needs to be async safe */
3365 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3367 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3369 if (ud->nframes < ud->max_frames) {
3370 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3377 /* This needs to be async safe */
3378 static SuspendThreadResult
3379 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3381 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3382 MonoInternalThread *thread = user_data->thread;
3385 /* This no longer works with remote unwinding */
3387 wapi_desc = wapi_current_thread_desc ();
3388 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3393 if (thread == mono_thread_internal_current ())
3394 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3396 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3398 return MonoResumeThread;
3402 int nthreads, max_threads;
3403 MonoInternalThread **threads;
3404 } CollectThreadsUserData;
3407 collect_thread (gpointer key, gpointer value, gpointer user)
3409 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3410 MonoInternalThread *thread = (MonoInternalThread *)value;
3412 if (ud->nthreads < ud->max_threads)
3413 ud->threads [ud->nthreads ++] = thread;
3417 * Collect running threads into the THREADS array.
3418 * THREADS should be an array allocated on the stack.
3421 collect_threads (MonoInternalThread **thread_array, int max_threads)
3423 CollectThreadsUserData ud;
3425 memset (&ud, 0, sizeof (ud));
3426 /* This array contains refs, but its on the stack, so its ok */
3427 ud.threads = thread_array;
3428 ud.max_threads = max_threads;
3430 mono_threads_lock ();
3431 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3432 mono_threads_unlock ();
3438 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3440 GString* text = g_string_new (0);
3442 GError *error = NULL;
3445 ud->thread = thread;
3448 /* Collect frames for the thread */
3449 if (thread == mono_thread_internal_current ()) {
3450 get_thread_dump (mono_thread_info_current (), ud);
3452 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3456 * Do all the non async-safe work outside of get_thread_dump.
3459 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3461 g_string_append_printf (text, "\n\"%s\"", name);
3464 else if (thread->threadpool_thread) {
3465 g_string_append (text, "\n\"<threadpool thread>\"");
3467 g_string_append (text, "\n\"<unnamed thread>\"");
3470 for (i = 0; i < ud->nframes; ++i) {
3471 MonoStackFrameInfo *frame = &ud->frames [i];
3472 MonoMethod *method = NULL;
3474 if (frame->type == FRAME_TYPE_MANAGED)
3475 method = mono_jit_info_get_method (frame->ji);
3478 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3479 g_string_append_printf (text, " %s\n", location);
3482 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3486 fprintf (stdout, "%s", text->str);
3488 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3489 OutputDebugStringA(text->str);
3492 g_string_free (text, TRUE);
3497 mono_threads_perform_thread_dump (void)
3499 ThreadDumpUserData ud;
3500 MonoInternalThread *thread_array [128];
3501 int tindex, nthreads;
3503 if (!thread_dump_requested)
3506 printf ("Full thread dump:\n");
3508 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3509 nthreads = collect_threads (thread_array, 128);
3511 memset (&ud, 0, sizeof (ud));
3512 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3513 ud.max_frames = 256;
3515 for (tindex = 0; tindex < nthreads; ++tindex)
3516 dump_thread (thread_array [tindex], &ud);
3520 thread_dump_requested = FALSE;
3523 /* Obtain the thread dump of all threads */
3525 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3529 ThreadDumpUserData ud;
3530 MonoInternalThread *thread_array [128];
3531 MonoDomain *domain = mono_domain_get ();
3532 MonoDebugSourceLocation *location;
3533 int tindex, nthreads;
3535 mono_error_init (&error);
3537 *out_threads = NULL;
3538 *out_stack_frames = NULL;
3540 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3541 nthreads = collect_threads (thread_array, 128);
3543 memset (&ud, 0, sizeof (ud));
3544 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3545 ud.max_frames = 256;
3547 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, &error);
3548 if (!is_ok (&error))
3550 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, &error);
3551 if (!is_ok (&error))
3554 for (tindex = 0; tindex < nthreads; ++tindex) {
3555 MonoInternalThread *thread = thread_array [tindex];
3556 MonoArray *thread_frames;
3562 /* Collect frames for the thread */
3563 if (thread == mono_thread_internal_current ()) {
3564 get_thread_dump (mono_thread_info_current (), &ud);
3566 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3569 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3571 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, &error);
3572 if (!is_ok (&error))
3574 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3576 for (i = 0; i < ud.nframes; ++i) {
3577 MonoStackFrameInfo *frame = &ud.frames [i];
3578 MonoMethod *method = NULL;
3579 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3580 if (!mono_error_ok (&error))
3583 sf->native_offset = frame->native_offset;
3585 if (frame->type == FRAME_TYPE_MANAGED)
3586 method = mono_jit_info_get_method (frame->ji);
3589 sf->method_address = (gsize) frame->ji->code_start;
3591 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3592 mono_error_raise_exception (&error); /* FIXME don't raise here */
3593 MONO_OBJECT_SETREF (sf, method, rm);
3595 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3597 sf->il_offset = location->il_offset;
3599 if (location && location->source_file) {
3600 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3601 sf->line = location->row;
3602 sf->column = location->column;
3604 mono_debug_free_source_location (location);
3609 mono_array_setref (thread_frames, i, sf);
3615 mono_error_raise_exception (&error); /* FIXME don't raise here */
3619 * mono_threads_request_thread_dump:
3621 * Ask all threads except the current to print their stacktrace to stdout.
3624 mono_threads_request_thread_dump (void)
3626 /*The new thread dump code runs out of the finalizer thread. */
3627 thread_dump_requested = TRUE;
3628 mono_gc_finalize_notify ();
3633 gint allocated; /* +1 so that refs [allocated] == NULL */
3637 typedef struct ref_stack RefStack;
3640 ref_stack_new (gint initial_size)
3644 initial_size = MAX (initial_size, 16) + 1;
3645 rs = g_new0 (RefStack, 1);
3646 rs->refs = g_new0 (gpointer, initial_size);
3647 rs->allocated = initial_size;
3652 ref_stack_destroy (gpointer ptr)
3654 RefStack *rs = (RefStack *)ptr;
3663 ref_stack_push (RefStack *rs, gpointer ptr)
3665 g_assert (rs != NULL);
3667 if (rs->bottom >= rs->allocated) {
3668 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3669 rs->allocated <<= 1;
3670 rs->refs [rs->allocated] = NULL;
3672 rs->refs [rs->bottom++] = ptr;
3676 ref_stack_pop (RefStack *rs)
3678 if (rs == NULL || rs->bottom == 0)
3682 rs->refs [rs->bottom] = NULL;
3686 ref_stack_find (RefStack *rs, gpointer ptr)
3693 for (refs = rs->refs; refs && *refs; refs++) {
3701 * mono_thread_push_appdomain_ref:
3703 * Register that the current thread may have references to objects in domain
3704 * @domain on its stack. Each call to this function should be paired with a
3705 * call to pop_appdomain_ref.
3708 mono_thread_push_appdomain_ref (MonoDomain *domain)
3710 MonoInternalThread *thread = mono_thread_internal_current ();
3713 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3714 SPIN_LOCK (thread->lock_thread_id);
3715 if (thread->appdomain_refs == NULL)
3716 thread->appdomain_refs = ref_stack_new (16);
3717 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3718 SPIN_UNLOCK (thread->lock_thread_id);
3723 mono_thread_pop_appdomain_ref (void)
3725 MonoInternalThread *thread = mono_thread_internal_current ();
3728 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3729 SPIN_LOCK (thread->lock_thread_id);
3730 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3731 SPIN_UNLOCK (thread->lock_thread_id);
3736 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3739 SPIN_LOCK (thread->lock_thread_id);
3740 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3741 SPIN_UNLOCK (thread->lock_thread_id);
3746 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3748 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3751 typedef struct abort_appdomain_data {
3752 struct wait_data wait;
3754 } abort_appdomain_data;
3757 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3759 MonoInternalThread *thread = (MonoInternalThread*)value;
3760 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3761 MonoDomain *domain = data->domain;
3763 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3764 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3766 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3767 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3770 data->wait.handles [data->wait.num] = handle;
3771 data->wait.threads [data->wait.num] = thread;
3774 /* Just ignore the rest, we can't do anything with
3782 * mono_threads_abort_appdomain_threads:
3784 * Abort threads which has references to the given appdomain.
3787 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3789 #ifdef __native_client__
3793 abort_appdomain_data user_data;
3795 int orig_timeout = timeout;
3798 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3800 start_time = mono_msec_ticks ();
3802 mono_threads_lock ();
3804 user_data.domain = domain;
3805 user_data.wait.num = 0;
3806 /* This shouldn't take any locks */
3807 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3808 mono_threads_unlock ();
3810 if (user_data.wait.num > 0) {
3811 /* Abort the threads outside the threads lock */
3812 for (i = 0; i < user_data.wait.num; ++i)
3813 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3816 * We should wait for the threads either to abort, or to leave the
3817 * domain. We can't do the latter, so we wait with a timeout.
3819 wait_for_tids (&user_data.wait, 100);
3822 /* Update remaining time */
3823 timeout -= mono_msec_ticks () - start_time;
3824 start_time = mono_msec_ticks ();
3826 if (orig_timeout != -1 && timeout < 0)
3829 while (user_data.wait.num > 0);
3831 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3837 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3839 MonoInternalThread *thread = (MonoInternalThread*)value;
3840 MonoDomain *domain = (MonoDomain*)user_data;
3843 /* No locking needed here */
3844 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3846 if (thread->cached_culture_info) {
3847 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3848 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3849 if (obj && obj->vtable->domain == domain)
3850 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3856 * mono_threads_clear_cached_culture:
3858 * Clear the cached_current_culture from all threads if it is in the
3862 mono_threads_clear_cached_culture (MonoDomain *domain)
3864 mono_threads_lock ();
3865 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3866 mono_threads_unlock ();
3870 * mono_thread_get_undeniable_exception:
3872 * Return an exception which needs to be raised when leaving a catch clause.
3873 * This is used for undeniable exception propagation.
3876 mono_thread_get_undeniable_exception (void)
3878 MonoInternalThread *thread = mono_thread_internal_current ();
3880 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3882 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3883 * exception if the thread no longer references a dying appdomain.
3885 thread->abort_exc->trace_ips = NULL;
3886 thread->abort_exc->stack_trace = NULL;
3887 return thread->abort_exc;
3893 #if MONO_SMALL_CONFIG
3894 #define NUM_STATIC_DATA_IDX 4
3895 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3899 #define NUM_STATIC_DATA_IDX 8
3900 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3901 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3905 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3906 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3909 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3911 gpointer *static_data = (gpointer *)addr;
3913 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3914 void **ptr = (void **)static_data [i];
3919 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3920 void **p = ptr + idx;
3923 mark_func ((MonoObject**)p, gc_data);
3929 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3931 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3935 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3937 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3941 * mono_alloc_static_data
3943 * Allocate memory blocks for storing threads or context static data
3946 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3948 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3951 gpointer* static_data = *static_data_ptr;
3953 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3954 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3956 if (mono_gc_user_markers_supported ()) {
3957 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3958 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3960 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3961 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3964 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3965 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3966 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3967 *static_data_ptr = static_data;
3968 static_data [0] = static_data;
3971 for (i = 1; i <= idx; ++i) {
3972 if (static_data [i])
3975 if (mono_gc_user_markers_supported ())
3976 static_data [i] = g_malloc0 (static_data_size [i]);
3978 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3979 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3980 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3985 mono_free_static_data (gpointer* static_data)
3988 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3989 gpointer p = static_data [i];
3993 * At this point, the static data pointer array is still registered with the
3994 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3995 * data. Freeing the individual arrays without first nulling their slots
3996 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3997 * such an already freed array. See bug #13813.
3999 static_data [i] = NULL;
4000 mono_memory_write_barrier ();
4001 if (mono_gc_user_markers_supported ())
4004 mono_gc_free_fixed (p);
4006 mono_gc_free_fixed (static_data);
4010 * mono_init_static_data_info
4012 * Initializes static data counters
4014 static void mono_init_static_data_info (StaticDataInfo *static_data)
4016 static_data->idx = 0;
4017 static_data->offset = 0;
4018 static_data->freelist = NULL;
4022 * mono_alloc_static_data_slot
4024 * Generates an offset for static data. static_data contains the counters
4025 * used to generate it.
4028 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4030 if (!static_data->idx && !static_data->offset) {
4032 * we use the first chunk of the first allocation also as
4033 * an array for the rest of the data
4035 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4037 static_data->offset += align - 1;
4038 static_data->offset &= ~(align - 1);
4039 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4040 static_data->idx ++;
4041 g_assert (size <= static_data_size [static_data->idx]);
4042 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4043 static_data->offset = 0;
4045 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4046 static_data->offset += size;
4051 * ensure thread static fields already allocated are valid for thread
4052 * This function is called when a thread is created or on thread attach.
4055 thread_adjust_static_data (MonoInternalThread *thread)
4057 mono_threads_lock ();
4058 if (thread_static_info.offset || thread_static_info.idx > 0) {
4059 /* get the current allocated size */
4060 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4061 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4063 mono_threads_unlock ();
4067 * LOCKING: requires that threads_mutex is held
4070 context_adjust_static_data (MonoAppContext *ctx)
4072 if (context_static_info.offset || context_static_info.idx > 0) {
4073 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4074 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4075 ctx->data->static_data = ctx->static_data;
4080 * LOCKING: requires that threads_mutex is held
4083 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4085 MonoInternalThread *thread = (MonoInternalThread *)value;
4086 guint32 offset = GPOINTER_TO_UINT (user);
4088 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4092 * LOCKING: requires that threads_mutex is held
4095 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4097 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4102 guint32 offset = GPOINTER_TO_UINT (user);
4103 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4104 ctx->data->static_data = ctx->static_data;
4107 static StaticDataFreeList*
4108 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4110 StaticDataFreeList* prev = NULL;
4111 StaticDataFreeList* tmp = static_data->freelist;
4113 if (tmp->size == size) {
4115 prev->next = tmp->next;
4117 static_data->freelist = tmp->next;
4126 #if SIZEOF_VOID_P == 4
4133 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4135 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4137 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4138 MonoBitSet *rb = sets [idx];
4139 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4140 offset /= sizeof (uintptr_t);
4141 /* offset is now the bitmap offset */
4142 for (int i = 0; i < numbits; ++i) {
4143 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4144 mono_bitset_set_fast (rb, offset + i);
4149 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4151 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4152 MonoBitSet *rb = sets [idx];
4153 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4154 offset /= sizeof (uintptr_t);
4155 /* offset is now the bitmap offset */
4156 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4157 mono_bitset_clear_fast (rb, offset + i);
4161 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4163 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4165 StaticDataInfo *info;
4168 if (static_type == SPECIAL_STATIC_THREAD) {
4169 info = &thread_static_info;
4170 sets = thread_reference_bitmaps;
4172 info = &context_static_info;
4173 sets = context_reference_bitmaps;
4176 mono_threads_lock ();
4178 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4182 offset = item->offset;
4185 offset = mono_alloc_static_data_slot (info, size, align);
4188 update_reference_bitmap (sets, offset, bitmap, numbits);
4190 if (static_type == SPECIAL_STATIC_THREAD) {
4191 /* This can be called during startup */
4192 if (threads != NULL)
4193 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4195 if (contexts != NULL)
4196 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4198 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4201 mono_threads_unlock ();
4207 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4209 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4211 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4212 return get_thread_static_data (thread, offset);
4214 return get_context_static_data (thread->current_appcontext, offset);
4219 mono_get_special_static_data (guint32 offset)
4221 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4230 * LOCKING: requires that threads_mutex is held
4233 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4235 MonoInternalThread *thread = (MonoInternalThread *)value;
4236 OffsetSize *data = (OffsetSize *)user;
4237 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4238 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4241 if (!thread->static_data || !thread->static_data [idx])
4243 ptr = ((char*) thread->static_data [idx]) + off;
4244 mono_gc_bzero_atomic (ptr, data->size);
4248 * LOCKING: requires that threads_mutex is held
4251 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4253 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4258 OffsetSize *data = (OffsetSize *)user;
4259 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4260 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4263 if (!ctx->static_data || !ctx->static_data [idx])
4266 ptr = ((char*) ctx->static_data [idx]) + off;
4267 mono_gc_bzero_atomic (ptr, data->size);
4271 do_free_special_slot (guint32 offset, guint32 size)
4273 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4275 StaticDataInfo *info;
4277 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4278 info = &thread_static_info;
4279 sets = thread_reference_bitmaps;
4281 info = &context_static_info;
4282 sets = context_reference_bitmaps;
4285 guint32 data_offset = offset;
4286 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4287 OffsetSize data = { data_offset, size };
4289 clear_reference_bitmap (sets, data.offset, data.size);
4291 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4292 if (threads != NULL)
4293 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4295 if (contexts != NULL)
4296 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4299 if (!mono_runtime_is_shutting_down ()) {
4300 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4302 item->offset = offset;
4305 item->next = info->freelist;
4306 info->freelist = item;
4311 do_free_special (gpointer key, gpointer value, gpointer data)
4313 MonoClassField *field = (MonoClassField *)key;
4314 guint32 offset = GPOINTER_TO_UINT (value);
4317 size = mono_type_size (field->type, &align);
4318 do_free_special_slot (offset, size);
4322 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4324 mono_threads_lock ();
4326 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4328 mono_threads_unlock ();
4332 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4334 /* Only ever called for ThreadLocal instances */
4335 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4337 mono_threads_lock ();
4338 do_free_special_slot (offset, size);
4339 mono_threads_unlock ();
4343 static void CALLBACK dummy_apc (ULONG_PTR param)
4349 * mono_thread_execute_interruption
4351 * Performs the operation that the requested thread state requires (abort,
4354 static MonoException*
4355 mono_thread_execute_interruption (void)
4357 MonoInternalThread *thread = mono_thread_internal_current ();
4358 MonoThread *sys_thread = mono_thread_current ();
4360 LOCK_THREAD (thread);
4362 /* MonoThread::interruption_requested can only be changed with atomics */
4363 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4364 /* this will consume pending APC calls */
4366 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4368 InterlockedDecrement (&thread_interruption_requested);
4370 /* Clear the interrupted flag of the thread so it can wait again */
4371 mono_thread_info_clear_self_interrupt ();
4374 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4375 if (sys_thread->pending_exception) {
4378 exc = sys_thread->pending_exception;
4379 sys_thread->pending_exception = NULL;
4381 UNLOCK_THREAD (thread);
4383 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4384 UNLOCK_THREAD (thread);
4385 g_assert (sys_thread->pending_exception == NULL);
4386 if (thread->abort_exc == NULL) {
4388 * This might be racy, but it has to be called outside the lock
4389 * since it calls managed code.
4391 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4393 return thread->abort_exc;
4395 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4396 /* calls UNLOCK_THREAD (thread) */
4397 self_suspend_internal ();
4400 else if ((thread->state & ThreadState_StopRequested) != 0) {
4401 /* FIXME: do this through the JIT? */
4403 UNLOCK_THREAD (thread);
4405 mono_thread_exit ();
4407 } else if (thread->thread_interrupt_requested) {
4409 thread->thread_interrupt_requested = FALSE;
4410 UNLOCK_THREAD (thread);
4412 return(mono_get_exception_thread_interrupted ());
4415 UNLOCK_THREAD (thread);
4421 * mono_thread_request_interruption
4423 * A signal handler can call this method to request the interruption of a
4424 * thread. The result of the interruption will depend on the current state of
4425 * the thread. If the result is an exception that needs to be throw, it is
4426 * provided as return value.
4429 mono_thread_request_interruption (gboolean running_managed)
4431 MonoInternalThread *thread = mono_thread_internal_current ();
4433 /* The thread may already be stopping */
4438 if (thread->interrupt_on_stop &&
4439 thread->state & ThreadState_StopRequested &&
4440 thread->state & ThreadState_Background)
4444 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4446 InterlockedIncrement (&thread_interruption_requested);
4448 if (!running_managed || is_running_protected_wrapper ()) {
4449 /* Can't stop while in unmanaged code. Increase the global interruption
4450 request count. When exiting the unmanaged method the count will be
4451 checked and the thread will be interrupted. */
4453 /* this will awake the thread if it is in WaitForSingleObject
4455 /* Our implementation of this function ignores the func argument */
4457 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4459 mono_thread_info_self_interrupt ();
4464 return mono_thread_execute_interruption ();
4468 /*This function should be called by a thread after it has exited all of
4469 * its handle blocks at interruption time.*/
4471 mono_thread_resume_interruption (void)
4473 MonoInternalThread *thread = mono_thread_internal_current ();
4474 gboolean still_aborting;
4476 /* The thread may already be stopping */
4480 LOCK_THREAD (thread);
4481 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4482 UNLOCK_THREAD (thread);
4484 /*This can happen if the protected block called Thread::ResetAbort*/
4485 if (!still_aborting)
4488 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4490 InterlockedIncrement (&thread_interruption_requested);
4492 mono_thread_info_self_interrupt ();
4494 return mono_thread_execute_interruption ();
4497 gboolean mono_thread_interruption_requested ()
4499 if (thread_interruption_requested) {
4500 MonoInternalThread *thread = mono_thread_internal_current ();
4501 /* The thread may already be stopping */
4503 return (thread->interruption_requested);
4508 static MonoException*
4509 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4511 MonoInternalThread *thread = mono_thread_internal_current ();
4513 /* The thread may already be stopping */
4517 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4518 MonoException* exc = mono_thread_execute_interruption ();
4526 * Performs the interruption of the current thread, if one has been requested,
4527 * and the thread is not running a protected wrapper.
4528 * Return the exception which needs to be thrown, if any.
4531 mono_thread_interruption_checkpoint (void)
4533 return mono_thread_interruption_checkpoint_request (FALSE);
4537 * Performs the interruption of the current thread, if one has been requested.
4538 * Return the exception which needs to be thrown, if any.
4541 mono_thread_force_interruption_checkpoint_noraise (void)
4543 return mono_thread_interruption_checkpoint_request (TRUE);
4547 * mono_set_pending_exception:
4549 * Set the pending exception of the current thread to EXC.
4550 * The exception will be thrown when execution returns to managed code.
4553 mono_set_pending_exception (MonoException *exc)
4555 MonoThread *thread = mono_thread_current ();
4557 /* The thread may already be stopping */
4561 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4563 mono_thread_request_interruption (FALSE);
4567 * mono_thread_interruption_request_flag:
4569 * Returns the address of a flag that will be non-zero if an interruption has
4570 * been requested for a thread. The thread to interrupt may not be the current
4571 * thread, so an additional call to mono_thread_interruption_requested() or
4572 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4575 gint32* mono_thread_interruption_request_flag ()
4577 return &thread_interruption_requested;
4581 mono_thread_init_apartment_state (void)
4584 MonoInternalThread* thread = mono_thread_internal_current ();
4586 /* Positive return value indicates success, either
4587 * S_OK if this is first CoInitialize call, or
4588 * S_FALSE if CoInitialize already called, but with same
4589 * threading model. A negative value indicates failure,
4590 * probably due to trying to change the threading model.
4592 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4593 ? COINIT_APARTMENTTHREADED
4594 : COINIT_MULTITHREADED) < 0) {
4595 thread->apartment_state = ThreadApartmentState_Unknown;
4601 mono_thread_cleanup_apartment_state (void)
4604 MonoInternalThread* thread = mono_thread_internal_current ();
4606 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4613 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4615 LOCK_THREAD (thread);
4616 thread->state |= state;
4617 UNLOCK_THREAD (thread);
4621 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4623 LOCK_THREAD (thread);
4624 thread->state &= ~state;
4625 UNLOCK_THREAD (thread);
4629 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4631 gboolean ret = FALSE;
4633 LOCK_THREAD (thread);
4635 if ((thread->state & test) != 0) {
4639 UNLOCK_THREAD (thread);
4644 static gboolean has_tls_get = FALSE;
4647 mono_runtime_set_has_tls_get (gboolean val)
4653 mono_runtime_has_tls_get (void)
4659 self_interrupt_thread (void *_unused)
4661 MonoThreadInfo *info = mono_thread_info_current ();
4662 MonoException *exc = mono_thread_execute_interruption ();
4663 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4664 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. */
4665 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4669 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4673 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4677 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4679 MonoJitInfo **dest = (MonoJitInfo **)data;
4685 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4687 MonoJitInfo *ji = NULL;
4692 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4693 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4694 * where we hold runtime locks.
4696 if (!mono_threads_is_coop_enabled ())
4697 mono_thread_info_set_is_async_context (TRUE);
4698 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4699 if (!mono_threads_is_coop_enabled ())
4700 mono_thread_info_set_is_async_context (FALSE);
4705 MonoInternalThread *thread;
4706 gboolean install_async_abort;
4707 MonoThreadInfoInterruptToken *interrupt_token;
4710 static SuspendThreadResult
4711 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4713 AbortThreadData *data = (AbortThreadData *)ud;
4714 MonoInternalThread *thread = data->thread;
4715 MonoJitInfo *ji = NULL;
4716 gboolean protected_wrapper;
4717 gboolean running_managed;
4719 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4720 return MonoResumeThread;
4722 /*someone is already interrupting it*/
4723 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4724 return MonoResumeThread;
4726 InterlockedIncrement (&thread_interruption_requested);
4728 ji = mono_thread_info_get_last_managed (info);
4729 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4730 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4732 if (!protected_wrapper && running_managed) {
4733 /*We are in managed code*/
4734 /*Set the thread to call */
4735 if (data->install_async_abort)
4736 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4737 return MonoResumeThread;
4740 * This will cause waits to be broken.
4741 * It will also prevent the thread from entering a wait, so if the thread returns
4742 * from the wait before it receives the abort signal, it will just spin in the wait
4743 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4746 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4748 return MonoResumeThread;
4753 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4755 AbortThreadData data;
4757 g_assert (thread != mono_thread_internal_current ());
4759 data.thread = thread;
4760 data.install_async_abort = install_async_abort;
4761 data.interrupt_token = NULL;
4763 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4764 if (data.interrupt_token)
4765 mono_thread_info_finish_interrupt (data.interrupt_token);
4766 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4770 self_abort_internal (void)
4774 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4775 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4777 exc = mono_thread_request_interruption (TRUE);
4779 mono_raise_exception (exc);
4781 mono_thread_info_self_interrupt ();
4785 MonoInternalThread *thread;
4787 MonoThreadInfoInterruptToken *interrupt_token;
4788 } SuspendThreadData;
4790 static SuspendThreadResult
4791 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4793 SuspendThreadData *data = (SuspendThreadData *)ud;
4794 MonoInternalThread *thread = data->thread;
4795 MonoJitInfo *ji = NULL;
4796 gboolean protected_wrapper;
4797 gboolean running_managed;
4799 ji = mono_thread_info_get_last_managed (info);
4800 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4801 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4803 if (running_managed && !protected_wrapper) {
4804 thread->state &= ~ThreadState_SuspendRequested;
4805 thread->state |= ThreadState_Suspended;
4806 return KeepSuspended;
4808 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4809 InterlockedIncrement (&thread_interruption_requested);
4810 if (data->interrupt)
4811 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4813 return MonoResumeThread;
4817 /* LOCKING: called with @thread synch_cs held, and releases it */
4819 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4821 SuspendThreadData data;
4823 g_assert (thread != mono_thread_internal_current ());
4825 data.thread = thread;
4826 data.interrupt = interrupt;
4827 data.interrupt_token = NULL;
4829 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4830 if (data.interrupt_token)
4831 mono_thread_info_finish_interrupt (data.interrupt_token);
4833 UNLOCK_THREAD (thread);
4836 /* LOCKING: called with @thread synch_cs held, and releases it */
4838 self_suspend_internal (void)
4840 MonoInternalThread *thread;
4842 thread = mono_thread_internal_current ();
4844 mono_thread_info_begin_self_suspend ();
4845 thread->state &= ~ThreadState_SuspendRequested;
4846 thread->state |= ThreadState_Suspended;
4848 UNLOCK_THREAD (thread);
4850 mono_thread_info_end_self_suspend ();
4854 * mono_thread_is_foreign:
4855 * @thread: the thread to query
4857 * This function allows one to determine if a thread was created by the mono runtime and has
4858 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4860 * Returns: TRUE if @thread was not created by the runtime.
4863 mono_thread_is_foreign (MonoThread *thread)
4865 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4866 return info->runtime_thread == FALSE;
4870 * mono_add_joinable_thread:
4872 * Add TID to the list of joinable threads.
4873 * LOCKING: Acquires the threads lock.
4876 mono_threads_add_joinable_thread (gpointer tid)
4880 * We cannot detach from threads because it causes problems like
4881 * 2fd16f60/r114307. So we collect them and join them when
4882 * we have time (in he finalizer thread).
4884 joinable_threads_lock ();
4885 if (!joinable_threads)
4886 joinable_threads = g_hash_table_new (NULL, NULL);
4887 g_hash_table_insert (joinable_threads, tid, tid);
4888 joinable_thread_count ++;
4889 joinable_threads_unlock ();
4891 mono_gc_finalize_notify ();
4896 * mono_threads_join_threads:
4898 * Join all joinable threads. This is called from the finalizer thread.
4899 * LOCKING: Acquires the threads lock.
4902 mono_threads_join_threads (void)
4905 GHashTableIter iter;
4912 if (!joinable_thread_count)
4916 joinable_threads_lock ();
4918 if (g_hash_table_size (joinable_threads)) {
4919 g_hash_table_iter_init (&iter, joinable_threads);
4920 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4921 thread = (pthread_t)tid;
4922 g_hash_table_remove (joinable_threads, key);
4923 joinable_thread_count --;
4926 joinable_threads_unlock ();
4928 if (thread != pthread_self ())
4929 /* This shouldn't block */
4930 pthread_join (thread, NULL);
4941 * Wait for thread TID to exit.
4942 * LOCKING: Acquires the threads lock.
4945 mono_thread_join (gpointer tid)
4949 gboolean found = FALSE;
4951 joinable_threads_lock ();
4952 if (!joinable_threads)
4953 joinable_threads = g_hash_table_new (NULL, NULL);
4954 if (g_hash_table_lookup (joinable_threads, tid)) {
4955 g_hash_table_remove (joinable_threads, tid);
4956 joinable_thread_count --;
4959 joinable_threads_unlock ();
4962 thread = (pthread_t)tid;
4963 pthread_join (thread, NULL);
4968 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4970 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4971 mono_thread_interruption_checkpoint ();
4974 static inline gboolean
4975 is_appdomainunloaded_exception (MonoClass *klass)
4977 return klass == mono_class_get_appdomain_unloaded_exception_class ();
4980 static inline gboolean
4981 is_threadabort_exception (MonoClass *klass)
4983 return klass == mono_defaults.threadabortexception_class;
4987 mono_thread_internal_unhandled_exception (MonoObject* exc)
4989 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4990 MonoClass *klass = exc->vtable->klass;
4991 if (is_threadabort_exception (klass)) {
4992 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4993 } else if (!is_appdomainunloaded_exception (klass)) {
4994 mono_unhandled_exception (exc);
4995 if (mono_environment_exitcode_get () == 1)
5002 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5004 mono_threads_get_thread_dump (out_threads, out_stack_traces);