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/mono-threads-coop.h>
41 #include <mono/utils/hazard-pointer.h>
42 #include <mono/utils/mono-tls.h>
43 #include <mono/utils/atomic.h>
44 #include <mono/utils/mono-memory-model.h>
45 #include <mono/utils/mono-threads-coop.h>
46 #include <mono/utils/mono-error-internals.h>
47 #include <mono/utils/os-event.h>
48 #include <mono/utils/mono-threads-debug.h>
49 #include <mono/metadata/w32handle.h>
50 #include <mono/metadata/w32event.h>
51 #include <mono/metadata/w32mutex.h>
53 #include <mono/metadata/gc-internals.h>
54 #include <mono/metadata/reflection-internals.h>
55 #include <mono/metadata/abi-details.h>
61 #if defined(HOST_WIN32)
65 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
66 #define USE_TKILL_ON_ANDROID 1
69 #ifdef PLATFORM_ANDROID
72 #ifdef USE_TKILL_ON_ANDROID
73 extern int tkill (pid_t tid, int signal);
77 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
78 #define THREAD_DEBUG(a)
79 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
80 #define THREAD_WAIT_DEBUG(a)
81 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
82 #define LIBGC_DEBUG(a)
84 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
85 #define SPIN_LOCK(i) do { \
86 if (SPIN_TRYLOCK (i)) \
90 #define SPIN_UNLOCK(i) i = 0
92 #define LOCK_THREAD(thread) lock_thread((thread))
93 #define UNLOCK_THREAD(thread) unlock_thread((thread))
105 typedef struct _StaticDataFreeList StaticDataFreeList;
106 struct _StaticDataFreeList {
107 StaticDataFreeList *next;
115 StaticDataFreeList *freelist;
118 /* Number of cached culture objects in the MonoThread->cached_culture_info array
119 * (per-type): we use the first NUM entries for CultureInfo and the last for
120 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
122 #define NUM_CACHED_CULTURES 4
123 #define CULTURES_START_IDX 0
124 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
126 /* Controls access to the 'threads' hash table */
127 static void mono_threads_lock (void);
128 static void mono_threads_unlock (void);
129 static MonoCoopMutex threads_mutex;
131 /* Controls access to the 'joinable_threads' hash table */
132 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
133 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
134 static mono_mutex_t joinable_threads_mutex;
136 /* Holds current status of static data heap */
137 static StaticDataInfo thread_static_info;
138 static StaticDataInfo context_static_info;
140 /* The hash of existing threads (key is thread ID, value is
141 * MonoInternalThread*) that need joining before exit
143 static MonoGHashTable *threads=NULL;
145 /* List of app context GC handles.
146 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
148 static GHashTable *contexts = NULL;
150 /* Cleanup queue for contexts. */
151 static MonoReferenceQueue *context_queue;
154 * Threads which are starting up and they are not in the 'threads' hash yet.
155 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
156 * Protected by mono_threads_lock ().
158 static MonoGHashTable *threads_starting_up = NULL;
160 /* The TLS key that holds the MonoObject assigned to each thread */
161 static MonoNativeTlsKey current_object_key;
164 /* Protected by the threads lock */
165 static GHashTable *joinable_threads;
166 static int joinable_thread_count;
168 #ifdef MONO_HAVE_FAST_TLS
169 /* we need to use both the Tls* functions and __thread because
170 * the gc needs to see all the threads
172 MONO_FAST_TLS_DECLARE(tls_current_object);
173 #define SET_CURRENT_OBJECT(x) do { \
174 MONO_FAST_TLS_SET (tls_current_object, x); \
175 mono_native_tls_set_value (current_object_key, x); \
177 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
179 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
180 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
183 /* function called at thread start */
184 static MonoThreadStartCB mono_thread_start_cb = NULL;
186 /* function called at thread attach */
187 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
189 /* function called at thread cleanup */
190 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
192 /* The default stack size for each thread */
193 static guint32 default_stacksize = 0;
194 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
196 static void context_adjust_static_data (MonoAppContext *ctx);
197 static void mono_free_static_data (gpointer* static_data);
198 static void mono_init_static_data_info (StaticDataInfo *static_data);
199 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
200 static gboolean mono_thread_resume (MonoInternalThread* thread);
201 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
202 static void self_abort_internal (MonoError *error);
203 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
204 static void self_suspend_internal (void);
206 static MonoException* mono_thread_execute_interruption (void);
207 static void ref_stack_destroy (gpointer rs);
209 /* Spin lock for InterlockedXXX 64 bit functions */
210 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
211 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
212 static mono_mutex_t interlocked_mutex;
214 /* global count of thread interruptions requested */
215 static gint32 thread_interruption_requested = 0;
217 /* Event signaled when a thread changes its background mode */
218 static MonoOSEvent background_change_event;
220 static gboolean shutting_down = FALSE;
222 static gint32 managed_thread_id_counter = 0;
224 /* Class lazy loading functions */
225 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
228 mono_threads_lock (void)
230 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
234 mono_threads_unlock (void)
236 mono_locks_coop_release (&threads_mutex, ThreadsLock);
241 get_next_managed_thread_id (void)
243 return InterlockedIncrement (&managed_thread_id_counter);
247 mono_thread_get_tls_key (void)
249 return current_object_key;
253 mono_thread_get_tls_offset (void)
258 if (current_object_key)
259 offset = current_object_key;
261 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
266 static inline MonoNativeThreadId
267 thread_get_tid (MonoInternalThread *thread)
269 /* We store the tid as a guint64 to keep the object layout constant between platforms */
270 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
273 static void ensure_synch_cs_set (MonoInternalThread *thread)
275 MonoCoopMutex *synch_cs;
277 if (thread->synch_cs != NULL) {
281 synch_cs = g_new0 (MonoCoopMutex, 1);
282 mono_coop_mutex_init_recursive (synch_cs);
284 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
285 synch_cs, NULL) != NULL) {
286 /* Another thread must have installed this CS */
287 mono_coop_mutex_destroy (synch_cs);
293 lock_thread (MonoInternalThread *thread)
295 if (!thread->synch_cs)
296 ensure_synch_cs_set (thread);
298 g_assert (thread->synch_cs);
300 mono_coop_mutex_lock (thread->synch_cs);
304 unlock_thread (MonoInternalThread *thread)
306 mono_coop_mutex_unlock (thread->synch_cs);
309 static inline gboolean
310 is_appdomainunloaded_exception (MonoClass *klass)
312 return klass == mono_class_get_appdomain_unloaded_exception_class ();
315 static inline gboolean
316 is_threadabort_exception (MonoClass *klass)
318 return klass == mono_defaults.threadabortexception_class;
322 * A special static data offset (guint32) consists of 3 parts:
324 * [0] 6-bit index into the array of chunks.
325 * [6] 25-bit offset into the array.
326 * [31] Bit indicating thread or context static.
331 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
342 } SpecialStaticOffset;
344 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
345 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
347 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
348 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
349 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
350 (((SpecialStaticOffset *) &(x))->fields.f)
353 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
355 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
357 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
358 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
360 return ((char *) thread->static_data [idx]) + off;
364 get_context_static_data (MonoAppContext *ctx, guint32 offset)
366 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
368 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
369 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
371 return ((char *) ctx->static_data [idx]) + off;
375 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
377 static MonoClassField *current_thread_field = NULL;
381 if (!current_thread_field) {
382 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
383 g_assert (current_thread_field);
386 mono_class_vtable (domain, mono_defaults.thread_class);
387 mono_domain_lock (domain);
388 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
389 mono_domain_unlock (domain);
392 return (MonoThread **)get_thread_static_data (thread, offset);
396 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
398 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
400 g_assert (current->obj.vtable->domain == domain);
402 g_assert (!*current_thread_ptr);
403 *current_thread_ptr = current;
407 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
413 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
416 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
417 /* only possible failure mode is OOM, from which we don't expect to recover. */
418 mono_error_assert_ok (&error);
420 MONO_OBJECT_SETREF (thread, internal_thread, internal);
425 static MonoInternalThread*
426 create_internal_thread_object (void)
429 MonoInternalThread *thread;
432 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
433 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
434 /* only possible failure mode is OOM, from which we don't exect to recover */
435 mono_error_assert_ok (&error);
437 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
438 mono_coop_mutex_init_recursive (thread->synch_cs);
440 thread->apartment_state = ThreadApartmentState_Unknown;
441 thread->managed_id = get_next_managed_thread_id ();
442 if (mono_gc_is_moving ()) {
443 thread->thread_pinning_ref = thread;
444 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
447 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
449 thread->suspended = g_new0 (MonoOSEvent, 1);
450 mono_os_event_init (thread->suspended, TRUE);
456 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
460 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
461 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
462 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
467 g_assert (internal->native_handle);
469 res = SetThreadPriority (internal->native_handle, priority - 2);
471 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
472 #else /* HOST_WIN32 */
475 struct sched_param param;
478 tid = thread_get_tid (internal);
480 res = pthread_getschedparam (tid, &policy, ¶m);
482 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
484 #ifdef _POSIX_PRIORITY_SCHEDULING
487 /* Necessary to get valid priority range */
489 min = sched_get_priority_min (policy);
490 max = sched_get_priority_max (policy);
492 if (max > 0 && min >= 0 && max > min) {
493 double srange, drange, sposition, dposition;
494 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
496 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
497 dposition = (sposition / srange) * drange;
498 param.sched_priority = (int)(dposition + min);
505 param.sched_priority = 50;
511 param.sched_priority = 0;
514 g_error ("%s: unknown policy %d", __func__, policy);
518 res = pthread_setschedparam (tid, policy, ¶m);
521 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
524 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
526 #endif /* HOST_WIN32 */
530 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
533 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain, gsize *stack_ptr)
535 MonoThreadInfo *info;
536 MonoInternalThread *internal;
537 MonoDomain *domain, *root_domain;
541 info = mono_thread_info_current ();
543 internal = thread->internal_thread;
544 internal->handle = mono_threads_open_thread_handle (info->handle);
546 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
548 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
549 internal->thread_info = info;
550 internal->small_id = info->small_id;
551 internal->stack_ptr = stack_ptr;
553 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
555 SET_CURRENT_OBJECT (internal);
557 domain = mono_object_domain (thread);
559 mono_thread_push_appdomain_ref (domain);
560 if (!mono_domain_set (domain, force_domain)) {
561 mono_thread_pop_appdomain_ref ();
565 mono_threads_lock ();
567 if (threads_starting_up)
568 mono_g_hash_table_remove (threads_starting_up, thread);
570 if (shutting_down && !force_attach) {
571 mono_threads_unlock ();
576 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
577 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
580 /* We don't need to duplicate thread->handle, because it is
581 * only closed when the thread object is finalized by the GC. */
582 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
584 /* We have to do this here because mono_thread_start_cb
585 * requires that root_domain_thread is set up. */
586 if (thread_static_info.offset || thread_static_info.idx > 0) {
587 /* get the current allocated size */
588 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
589 mono_alloc_static_data (&internal->static_data, offset, TRUE);
592 mono_threads_unlock ();
594 root_domain = mono_get_root_domain ();
596 g_assert (!internal->root_domain_thread);
597 if (domain != root_domain)
598 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
600 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
602 if (domain != root_domain)
603 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
605 set_current_thread_for_domain (domain, internal, thread);
607 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
615 MonoObject *start_delegate;
616 MonoObject *start_delegate_arg;
617 MonoThreadStart start_func;
618 gpointer start_func_arg;
620 MonoCoopSem registered;
623 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
626 MonoThreadStart start_func;
627 void *start_func_arg;
630 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
634 MonoInternalThread *internal;
635 MonoObject *start_delegate;
636 MonoObject *start_delegate_arg;
639 thread = start_info->thread;
640 internal = thread->internal_thread;
641 domain = mono_object_domain (start_info->thread);
643 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
645 if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
646 start_info->failed = TRUE;
648 mono_coop_sem_post (&start_info->registered);
650 if (InterlockedDecrement (&start_info->ref) == 0) {
651 mono_coop_sem_destroy (&start_info->registered);
658 mono_thread_internal_set_priority (internal, internal->priority);
662 start_delegate = start_info->start_delegate;
663 start_delegate_arg = start_info->start_delegate_arg;
664 start_func = start_info->start_func;
665 start_func_arg = start_info->start_func_arg;
667 /* This MUST be called before any managed code can be
668 * executed, as it calls the callback function that (for the
669 * jit) sets the lmf marker.
672 if (mono_thread_start_cb)
673 mono_thread_start_cb (tid, stack_ptr, start_func);
675 /* On 2.0 profile (and higher), set explicitly since state might have been
677 if (internal->apartment_state == ThreadApartmentState_Unknown)
678 internal->apartment_state = ThreadApartmentState_MTA;
680 mono_thread_init_apartment_state ();
682 /* Let the thread that called Start() know we're ready */
683 mono_coop_sem_post (&start_info->registered);
685 if (InterlockedDecrement (&start_info->ref) == 0) {
686 mono_coop_sem_destroy (&start_info->registered);
690 /* start_info is not valid anymore */
694 * Call this after calling start_notify, since the profiler callback might want
695 * to lock the thread, and the lock is held by thread_start () which waits for
698 mono_profiler_thread_start (tid);
700 /* if the name was set before starting, we didn't invoke the profiler callback */
701 if (internal->name) {
702 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
703 mono_profiler_thread_name (internal->tid, tname);
704 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
708 /* start_func is set only for unmanaged start functions */
710 start_func (start_func_arg);
714 g_assert (start_delegate != NULL);
716 /* we may want to handle the exception here. See comment below on unhandled exceptions */
717 args [0] = (gpointer) start_delegate_arg;
718 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
720 if (!mono_error_ok (&error)) {
721 MonoException *ex = mono_error_convert_to_exception (&error);
723 g_assert (ex != NULL);
724 MonoClass *klass = mono_object_get_class (&ex->object);
725 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
726 !is_threadabort_exception (klass)) {
727 mono_unhandled_exception (&ex->object);
728 mono_invoke_unhandled_exception_hook (&ex->object);
729 g_assert_not_reached ();
732 mono_error_cleanup (&error);
736 /* If the thread calls ExitThread at all, this remaining code
737 * will not be executed, but the main thread will eventually
738 * call mono_thread_detach_internal() on this thread's behalf.
741 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
743 /* Do any cleanup needed for apartment state. This
744 * cannot be done in mono_thread_detach_internal since
745 * mono_thread_detach_internal could be called for a
746 * thread other than the current thread.
747 * mono_thread_cleanup_apartment_state cleans up apartment
748 * for the current thead */
749 mono_thread_cleanup_apartment_state ();
751 mono_thread_detach_internal (internal);
758 static gsize WINAPI start_wrapper(void *data)
760 volatile gsize dummy;
762 return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
768 * Common thread creation code.
769 * LOCKING: Acquires the threads lock.
772 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
773 gboolean threadpool_thread, guint32 stack_size, MonoError *error)
775 StartInfo *start_info = NULL;
776 MonoThreadHandle *thread_handle;
777 MonoNativeThreadId tid;
779 gsize stack_set_size;
782 g_assert (!start_func && !start_func_arg);
784 g_assert (!start_delegate);
787 * Join joinable threads to prevent running out of threads since the finalizer
788 * thread might be blocked/backlogged.
790 mono_threads_join_threads ();
792 mono_error_init (error);
794 mono_threads_lock ();
796 mono_threads_unlock ();
799 if (threads_starting_up == NULL) {
800 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
801 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
803 mono_g_hash_table_insert (threads_starting_up, thread, thread);
804 mono_threads_unlock ();
806 internal->threadpool_thread = threadpool_thread;
807 if (threadpool_thread)
808 mono_thread_set_state (internal, ThreadState_Background);
810 start_info = g_new0 (StartInfo, 1);
812 start_info->thread = thread;
813 start_info->start_delegate = start_delegate;
814 start_info->start_delegate_arg = thread->start_obj;
815 start_info->start_func = start_func;
816 start_info->start_func_arg = start_func_arg;
817 start_info->failed = FALSE;
818 mono_coop_sem_init (&start_info->registered, 0);
821 stack_set_size = default_stacksize_for_thread (internal);
825 thread_handle = mono_threads_create_thread (start_wrapper, start_info, &stack_set_size, &tid);
827 if (thread_handle == NULL) {
828 /* The thread couldn't be created, so set an exception */
829 mono_threads_lock ();
830 mono_g_hash_table_remove (threads_starting_up, thread);
831 mono_threads_unlock ();
832 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
833 /* ref is not going to be decremented in start_wrapper_internal */
834 InterlockedDecrement (&start_info->ref);
839 internal->stack_size = (int) stack_set_size;
841 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
844 * Wait for the thread to set up its TLS data etc, so
845 * theres no potential race condition if someone tries
846 * to look up the data believing the thread has
850 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
852 mono_threads_close_thread_handle (thread_handle);
854 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));
856 ret = !start_info->failed;
859 if (InterlockedDecrement (&start_info->ref) == 0) {
860 mono_coop_sem_destroy (&start_info->registered);
867 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
869 if (mono_thread_start_cb) {
870 mono_thread_start_cb (tid, stack_start, func);
874 void mono_threads_set_default_stacksize (guint32 stacksize)
876 default_stacksize = stacksize;
879 guint32 mono_threads_get_default_stacksize (void)
881 return default_stacksize;
885 * mono_thread_create_internal:
887 * ARG should not be a GC reference.
890 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
893 MonoInternalThread *internal;
896 mono_error_init (error);
898 internal = create_internal_thread_object ();
900 thread = create_thread_object (domain, internal);
902 LOCK_THREAD (internal);
904 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
905 return_val_if_nok (error, NULL);
907 UNLOCK_THREAD (internal);
913 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
916 if (!mono_thread_create_checked (domain, func, arg, &error))
917 mono_error_cleanup (&error);
921 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
923 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
927 mono_thread_attach (MonoDomain *domain)
929 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
935 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
937 MonoInternalThread *internal;
939 MonoNativeThreadId tid;
942 if (mono_thread_internal_current_is_attached ()) {
943 if (domain != mono_domain_get ())
944 mono_domain_set (domain, TRUE);
945 /* Already attached */
946 return mono_thread_current ();
949 if (!mono_gc_register_thread (&domain)) {
950 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 ());
953 tid=mono_native_thread_id_get ();
955 internal = create_internal_thread_object ();
957 thread = create_thread_object (domain, internal);
959 if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
960 /* Mono is shutting down, so just wait for the end */
962 mono_thread_info_sleep (10000, NULL);
965 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
967 if (mono_thread_attach_cb) {
971 mono_thread_info_get_stack_bounds (&staddr, &stsize);
974 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
976 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
979 /* Can happen when we attach the profiler helper thread in order to heapshot. */
980 if (!mono_thread_info_current ()->tools_thread)
981 // FIXME: Need a separate callback
982 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
988 mono_thread_detach_internal (MonoInternalThread *thread)
992 g_assert (thread != NULL);
994 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
997 mono_w32mutex_abandon ();
1000 if (thread->abort_state_handle) {
1001 mono_gchandle_free (thread->abort_state_handle);
1002 thread->abort_state_handle = 0;
1005 thread->abort_exc = NULL;
1006 thread->current_appcontext = NULL;
1009 * This is necessary because otherwise we might have
1010 * cross-domain references which will not get cleaned up when
1011 * the target domain is unloaded.
1013 if (thread->cached_culture_info) {
1015 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
1016 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
1020 * thread->synch_cs can be NULL if this was called after
1021 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1022 * This can happen only during shutdown.
1023 * The shutting_down flag is not always set, so we can't assert on it.
1025 if (thread->synch_cs)
1026 LOCK_THREAD (thread);
1028 thread->state |= ThreadState_Stopped;
1029 thread->state &= ~ThreadState_Background;
1031 if (thread->synch_cs)
1032 UNLOCK_THREAD (thread);
1035 An interruption request has leaked to cleanup. Adjust the global counter.
1037 This can happen is the abort source thread finds the abortee (this) thread
1038 in unmanaged code. If this thread never trips back to managed code or check
1039 the local flag it will be left set and positively unbalance the global counter.
1041 Leaving the counter unbalanced will cause a performance degradation since all threads
1042 will now keep checking their local flags all the time.
1044 if (InterlockedExchange (&thread->interruption_requested, 0) != 0)
1045 InterlockedDecrement (&thread_interruption_requested);
1047 mono_threads_lock ();
1051 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1052 /* We have to check whether the thread object for the
1053 * tid is still the same in the table because the
1054 * thread might have been destroyed and the tid reused
1055 * in the meantime, in which case the tid would be in
1056 * the table, but with another thread object.
1060 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1064 mono_threads_unlock ();
1066 /* Don't close the handle here, wait for the object finalizer
1067 * to do it. Otherwise, the following race condition applies:
1069 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1071 * 2) Some other handle is reassigned the same slot
1073 * 3) Another thread tries to join the first thread, and
1074 * blocks waiting for the reassigned handle to be signalled
1075 * (which might never happen). This is possible, because the
1076 * thread calling Join() still has a reference to the first
1080 /* if the thread is not in the hash it has been removed already */
1082 mono_domain_unset ();
1083 mono_memory_barrier ();
1085 if (mono_thread_cleanup_fn)
1086 mono_thread_cleanup_fn (thread_get_tid (thread));
1091 mono_release_type_locks (thread);
1093 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1094 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1095 mono_profiler_thread_end (thread->tid);
1097 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1100 * This will signal async signal handlers that the thread has exited.
1101 * The profiler callback needs this to be set, so it cannot be done earlier.
1103 mono_domain_unset ();
1104 mono_memory_barrier ();
1106 if (thread == mono_thread_internal_current ())
1107 mono_thread_pop_appdomain_ref ();
1109 thread->cached_culture_info = NULL;
1111 mono_free_static_data (thread->static_data);
1112 thread->static_data = NULL;
1113 ref_stack_destroy (thread->appdomain_refs);
1114 thread->appdomain_refs = NULL;
1116 g_assert (thread->suspended);
1117 mono_os_event_destroy (thread->suspended);
1118 g_free (thread->suspended);
1119 thread->suspended = NULL;
1121 if (mono_thread_cleanup_fn)
1122 mono_thread_cleanup_fn (thread_get_tid (thread));
1124 if (mono_gc_is_moving ()) {
1125 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1126 thread->thread_pinning_ref = NULL;
1130 SET_CURRENT_OBJECT (NULL);
1131 mono_domain_unset ();
1133 /* Don't need to close the handle to this thread, even though we took a
1134 * reference in mono_thread_attach (), because the GC will do it
1135 * when the Thread object is finalised.
1140 mono_thread_detach (MonoThread *thread)
1143 mono_thread_detach_internal (thread->internal_thread);
1147 * mono_thread_detach_if_exiting:
1149 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1150 * This should be used at the end of embedding code which calls into managed code, and which
1151 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1154 mono_thread_detach_if_exiting (void)
1156 if (mono_thread_info_is_exiting ()) {
1157 MonoInternalThread *thread;
1159 thread = mono_thread_internal_current ();
1161 mono_thread_detach_internal (thread);
1162 mono_thread_info_detach ();
1170 mono_thread_internal_current_is_attached (void)
1172 MonoInternalThread *internal;
1174 internal = GET_CURRENT_OBJECT ();
1182 mono_thread_exit (void)
1184 MonoInternalThread *thread = mono_thread_internal_current ();
1186 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1188 mono_thread_detach_internal (thread);
1190 /* we could add a callback here for embedders to use. */
1191 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1192 exit (mono_environment_exitcode_get ());
1194 mono_thread_info_exit (0);
1198 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1200 MonoInternalThread *internal;
1202 internal = create_internal_thread_object ();
1204 internal->state = ThreadState_Unstarted;
1206 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1210 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1212 return mono_thread_current ();
1216 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1220 MonoInternalThread *internal;
1223 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1225 if (!this_obj->internal_thread)
1226 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1227 internal = this_obj->internal_thread;
1229 LOCK_THREAD (internal);
1231 if ((internal->state & ThreadState_Unstarted) == 0) {
1232 UNLOCK_THREAD (internal);
1233 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1237 if ((internal->state & ThreadState_Aborted) != 0) {
1238 UNLOCK_THREAD (internal);
1242 res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1244 mono_error_cleanup (&error);
1245 UNLOCK_THREAD (internal);
1249 internal->state &= ~ThreadState_Unstarted;
1251 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1253 UNLOCK_THREAD (internal);
1254 return internal->handle;
1258 * This is called from the finalizer of the internal thread object.
1261 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1263 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1266 * Since threads keep a reference to their thread object while running, by
1267 * the time this function is called, the thread has already exited/detached,
1268 * i.e. mono_thread_detach_internal () has ran. The exception is during
1269 * shutdown, when mono_thread_detach_internal () can be called after this.
1271 if (this_obj->handle) {
1272 mono_threads_close_thread_handle (this_obj->handle);
1273 this_obj->handle = NULL;
1277 CloseHandle (this_obj->native_handle);
1280 if (this_obj->synch_cs) {
1281 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1282 this_obj->synch_cs = NULL;
1283 mono_coop_mutex_destroy (synch_cs);
1287 if (this_obj->name) {
1288 void *name = this_obj->name;
1289 this_obj->name = NULL;
1295 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1298 MonoInternalThread *thread = mono_thread_internal_current ();
1300 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1302 if (mono_thread_current_check_pending_interrupt ())
1306 gboolean alerted = FALSE;
1308 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1310 res = mono_thread_info_sleep (ms, &alerted);
1312 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1315 MonoException* exc = mono_thread_execute_interruption ();
1317 mono_raise_exception (exc);
1319 // FIXME: !MONO_INFINITE_WAIT
1320 if (ms != MONO_INFINITE_WAIT)
1329 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1334 ves_icall_System_Threading_Thread_GetDomainID (void)
1336 return mono_domain_get()->domain_id;
1340 ves_icall_System_Threading_Thread_Yield (void)
1342 return mono_thread_info_yield ();
1346 * mono_thread_get_name:
1348 * Return the name of the thread. NAME_LEN is set to the length of the name.
1349 * Return NULL if the thread has no name. The returned memory is owned by the
1353 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1357 LOCK_THREAD (this_obj);
1359 if (!this_obj->name) {
1363 *name_len = this_obj->name_len;
1364 res = g_new (gunichar2, this_obj->name_len);
1365 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1368 UNLOCK_THREAD (this_obj);
1374 * mono_thread_get_name_utf8:
1376 * Return the name of the thread in UTF-8.
1377 * Return NULL if the thread has no name.
1378 * The returned memory is owned by the caller.
1381 mono_thread_get_name_utf8 (MonoThread *thread)
1386 MonoInternalThread *internal = thread->internal_thread;
1387 if (internal == NULL)
1390 LOCK_THREAD (internal);
1392 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1394 UNLOCK_THREAD (internal);
1400 * mono_thread_get_managed_id:
1402 * Return the Thread.ManagedThreadId value of `thread`.
1403 * Returns -1 if `thread` is NULL.
1406 mono_thread_get_managed_id (MonoThread *thread)
1411 MonoInternalThread *internal = thread->internal_thread;
1412 if (internal == NULL)
1415 int32_t id = internal->managed_id;
1421 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1426 mono_error_init (&error);
1428 LOCK_THREAD (this_obj);
1430 if (!this_obj->name)
1433 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1435 UNLOCK_THREAD (this_obj);
1437 if (mono_error_set_pending_exception (&error))
1444 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1446 LOCK_THREAD (this_obj);
1448 mono_error_init (error);
1450 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1451 UNLOCK_THREAD (this_obj);
1453 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1456 if (this_obj->name) {
1457 g_free (this_obj->name);
1458 this_obj->name_len = 0;
1461 this_obj->name = g_new (gunichar2, mono_string_length (name));
1462 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1463 this_obj->name_len = mono_string_length (name);
1466 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1469 this_obj->name = NULL;
1472 UNLOCK_THREAD (this_obj);
1474 if (this_obj->name && this_obj->tid) {
1475 char *tname = mono_string_to_utf8_checked (name, error);
1476 return_if_nok (error);
1477 mono_profiler_thread_name (this_obj->tid, tname);
1478 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1484 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1487 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1488 mono_error_set_pending_exception (&error);
1492 * ves_icall_System_Threading_Thread_GetPriority_internal:
1493 * @param this_obj: The MonoInternalThread on which to operate.
1495 * Gets the priority of the given thread.
1496 * @return: The priority of the given thread.
1499 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1502 MonoInternalThread *internal = this_obj->internal_thread;
1504 LOCK_THREAD (internal);
1505 priority = internal->priority;
1506 UNLOCK_THREAD (internal);
1512 * ves_icall_System_Threading_Thread_SetPriority_internal:
1513 * @param this_obj: The MonoInternalThread on which to operate.
1514 * @param priority: The priority to set.
1516 * Sets the priority of the given thread.
1519 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1521 MonoInternalThread *internal = this_obj->internal_thread;
1523 LOCK_THREAD (internal);
1524 internal->priority = priority;
1525 if (internal->thread_info != NULL)
1526 mono_thread_internal_set_priority (internal, priority);
1527 UNLOCK_THREAD (internal);
1530 /* If the array is already in the requested domain, we just return it,
1531 otherwise we return a copy in that domain. */
1533 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1537 mono_error_init (error);
1541 if (mono_object_domain (arr) == domain)
1544 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1545 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1550 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1553 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1554 mono_error_set_pending_exception (&error);
1559 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1562 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1563 mono_error_set_pending_exception (&error);
1568 mono_thread_current (void)
1570 MonoDomain *domain = mono_domain_get ();
1571 MonoInternalThread *internal = mono_thread_internal_current ();
1572 MonoThread **current_thread_ptr;
1574 g_assert (internal);
1575 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1577 if (!*current_thread_ptr) {
1578 g_assert (domain != mono_get_root_domain ());
1579 *current_thread_ptr = create_thread_object (domain, internal);
1581 return *current_thread_ptr;
1584 /* Return the thread object belonging to INTERNAL in the current domain */
1586 mono_thread_current_for_thread (MonoInternalThread *internal)
1588 MonoDomain *domain = mono_domain_get ();
1589 MonoThread **current_thread_ptr;
1591 g_assert (internal);
1592 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1594 if (!*current_thread_ptr) {
1595 g_assert (domain != mono_get_root_domain ());
1596 *current_thread_ptr = create_thread_object (domain, internal);
1598 return *current_thread_ptr;
1602 mono_thread_internal_current (void)
1604 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1605 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1609 static MonoThreadInfoWaitRet
1610 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1613 MonoThreadInfoWaitRet ret;
1618 mono_error_init (error);
1620 start = (ms == -1) ? 0 : mono_msec_ticks ();
1623 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1626 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1629 exc = mono_thread_execute_interruption ();
1631 mono_error_set_exception_instance (error, exc);
1638 /* Re-calculate ms according to the time passed */
1639 diff_ms = (gint32)(mono_msec_ticks () - start);
1640 if (diff_ms >= ms) {
1641 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1644 wait = ms - diff_ms;
1651 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1653 MonoInternalThread *thread = this_obj->internal_thread;
1654 MonoThreadHandle *handle = thread->handle;
1655 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1659 if (mono_thread_current_check_pending_interrupt ())
1662 LOCK_THREAD (thread);
1664 if ((thread->state & ThreadState_Unstarted) != 0) {
1665 UNLOCK_THREAD (thread);
1667 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1671 UNLOCK_THREAD (thread);
1674 ms=MONO_INFINITE_WAIT;
1676 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1678 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1680 ret=mono_join_uninterrupted (handle, ms, &error);
1682 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1684 mono_error_set_pending_exception (&error);
1686 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1687 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1692 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1697 #define MANAGED_WAIT_FAILED 0x7fffffff
1700 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1702 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1703 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1704 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1705 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1706 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1707 return WAIT_IO_COMPLETION;
1708 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1709 return WAIT_TIMEOUT;
1710 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1711 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1712 return MANAGED_WAIT_FAILED;
1714 g_error ("%s: unknown val value %d", __func__, val);
1718 static MonoW32HandleWaitRet
1719 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1722 MonoW32HandleWaitRet ret;
1727 mono_error_init (error);
1729 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1733 if (numhandles != 1)
1734 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1736 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1738 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1739 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1740 #endif /* HOST_WIN32 */
1743 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1746 exc = mono_thread_execute_interruption ();
1748 mono_error_set_exception_instance (error, exc);
1755 /* Re-calculate ms according to the time passed */
1756 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1757 if (diff_ms >= ms) {
1758 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1761 wait = ms - diff_ms;
1767 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1772 MonoW32HandleWaitRet ret;
1774 MonoObject *waitHandle;
1775 MonoInternalThread *thread = mono_thread_internal_current ();
1777 /* Do this WaitSleepJoin check before creating objects */
1778 if (mono_thread_current_check_pending_interrupt ())
1779 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1781 /* We fail in managed if the array has more than 64 elements */
1782 numhandles = (guint32)mono_array_length(mono_handles);
1783 handles = g_new0(HANDLE, numhandles);
1785 for(i = 0; i < numhandles; i++) {
1786 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1787 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1791 ms=MONO_INFINITE_WAIT;
1794 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1796 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1798 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1802 mono_error_set_pending_exception (&error);
1804 return map_native_wait_result_to_managed (ret, numhandles);
1807 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1810 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1811 uintptr_t numhandles;
1812 MonoW32HandleWaitRet ret;
1814 MonoObject *waitHandle;
1815 MonoInternalThread *thread = mono_thread_internal_current ();
1817 /* Do this WaitSleepJoin check before creating objects */
1818 if (mono_thread_current_check_pending_interrupt ())
1819 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1821 numhandles = mono_array_length(mono_handles);
1822 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1823 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1825 for(i = 0; i < numhandles; i++) {
1826 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1827 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1831 ms=MONO_INFINITE_WAIT;
1834 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1836 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1838 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1840 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1842 mono_error_set_pending_exception (&error);
1844 return map_native_wait_result_to_managed (ret, numhandles);
1847 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1850 MonoW32HandleWaitRet ret;
1851 MonoInternalThread *thread = mono_thread_internal_current ();
1853 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1856 ms=MONO_INFINITE_WAIT;
1859 if (mono_thread_current_check_pending_interrupt ())
1860 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1862 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1864 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1866 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1868 mono_error_set_pending_exception (&error);
1869 return map_native_wait_result_to_managed (ret, 1);
1873 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1875 MonoW32HandleWaitRet ret;
1876 MonoInternalThread *thread = mono_thread_internal_current ();
1879 ms = MONO_INFINITE_WAIT;
1881 if (mono_thread_current_check_pending_interrupt ())
1882 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1884 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1888 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1890 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1894 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1896 return map_native_wait_result_to_managed (ret, 1);
1899 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1901 return InterlockedIncrement (location);
1904 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1906 #if SIZEOF_VOID_P == 4
1907 if (G_UNLIKELY ((size_t)location & 0x7)) {
1909 mono_interlocked_lock ();
1912 mono_interlocked_unlock ();
1916 return InterlockedIncrement64 (location);
1919 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1921 return InterlockedDecrement(location);
1924 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1926 #if SIZEOF_VOID_P == 4
1927 if (G_UNLIKELY ((size_t)location & 0x7)) {
1929 mono_interlocked_lock ();
1932 mono_interlocked_unlock ();
1936 return InterlockedDecrement64 (location);
1939 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1941 return InterlockedExchange(location, value);
1944 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1947 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1948 mono_gc_wbarrier_generic_nostore (location);
1952 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1954 return InterlockedExchangePointer(location, value);
1957 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1959 IntFloatUnion val, ret;
1962 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1968 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1970 #if SIZEOF_VOID_P == 4
1971 if (G_UNLIKELY ((size_t)location & 0x7)) {
1973 mono_interlocked_lock ();
1976 mono_interlocked_unlock ();
1980 return InterlockedExchange64 (location, value);
1984 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1986 LongDoubleUnion val, ret;
1989 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1994 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1996 return InterlockedCompareExchange(location, value, comparand);
1999 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2001 gint32 r = InterlockedCompareExchange(location, value, comparand);
2002 *success = r == comparand;
2006 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2009 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2010 mono_gc_wbarrier_generic_nostore (location);
2014 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2016 return InterlockedCompareExchangePointer(location, value, comparand);
2019 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2021 IntFloatUnion val, ret, cmp;
2024 cmp.fval = comparand;
2025 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2031 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2033 #if SIZEOF_VOID_P == 8
2034 LongDoubleUnion val, comp, ret;
2037 comp.fval = comparand;
2038 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2044 mono_interlocked_lock ();
2046 if (old == comparand)
2048 mono_interlocked_unlock ();
2055 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2057 #if SIZEOF_VOID_P == 4
2058 if (G_UNLIKELY ((size_t)location & 0x7)) {
2060 mono_interlocked_lock ();
2062 if (old == comparand)
2064 mono_interlocked_unlock ();
2068 return InterlockedCompareExchange64 (location, value, comparand);
2072 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2075 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2076 mono_gc_wbarrier_generic_nostore (location);
2081 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2084 MONO_CHECK_NULL (location, NULL);
2085 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2086 mono_gc_wbarrier_generic_nostore (location);
2091 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2093 return InterlockedAdd (location, value);
2097 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2099 #if SIZEOF_VOID_P == 4
2100 if (G_UNLIKELY ((size_t)location & 0x7)) {
2102 mono_interlocked_lock ();
2105 mono_interlocked_unlock ();
2109 return InterlockedAdd64 (location, value);
2113 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2115 #if SIZEOF_VOID_P == 4
2116 if (G_UNLIKELY ((size_t)location & 0x7)) {
2118 mono_interlocked_lock ();
2120 mono_interlocked_unlock ();
2124 return InterlockedRead64 (location);
2128 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2130 mono_memory_barrier ();
2134 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2136 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2138 if (state & ThreadState_Background) {
2139 /* If the thread changes the background mode, the main thread has to
2140 * be notified, since it has to rebuild the list of threads to
2143 mono_os_event_set (&background_change_event);
2148 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2150 mono_thread_set_state (this_obj, (MonoThreadState)state);
2152 if (state & ThreadState_Background) {
2153 /* If the thread changes the background mode, the main thread has to
2154 * be notified, since it has to rebuild the list of threads to
2157 mono_os_event_set (&background_change_event);
2162 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2166 LOCK_THREAD (this_obj);
2168 state = this_obj->state;
2170 UNLOCK_THREAD (this_obj);
2175 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2177 MonoInternalThread *current;
2179 MonoInternalThread *thread = this_obj->internal_thread;
2181 LOCK_THREAD (thread);
2183 current = mono_thread_internal_current ();
2185 thread->thread_interrupt_requested = TRUE;
2186 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2188 UNLOCK_THREAD (thread);
2191 async_abort_internal (thread, FALSE);
2196 * mono_thread_current_check_pending_interrupt:
2198 * Checks if there's a interruption request and set the pending exception if so.
2200 * @returns true if a pending exception was set
2203 mono_thread_current_check_pending_interrupt (void)
2205 MonoInternalThread *thread = mono_thread_internal_current ();
2206 gboolean throw_ = FALSE;
2208 LOCK_THREAD (thread);
2210 if (thread->thread_interrupt_requested) {
2212 thread->thread_interrupt_requested = FALSE;
2215 UNLOCK_THREAD (thread);
2218 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2223 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2225 LOCK_THREAD (thread);
2227 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2228 (thread->state & ThreadState_StopRequested) != 0 ||
2229 (thread->state & ThreadState_Stopped) != 0)
2231 UNLOCK_THREAD (thread);
2235 if ((thread->state & ThreadState_Unstarted) != 0) {
2236 thread->state |= ThreadState_Aborted;
2237 UNLOCK_THREAD (thread);
2241 thread->state |= ThreadState_AbortRequested;
2242 if (thread->abort_state_handle)
2243 mono_gchandle_free (thread->abort_state_handle);
2245 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2246 g_assert (thread->abort_state_handle);
2248 thread->abort_state_handle = 0;
2250 thread->abort_exc = NULL;
2252 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));
2254 /* During shutdown, we can't wait for other threads */
2256 /* Make sure the thread is awake */
2257 mono_thread_resume (thread);
2259 UNLOCK_THREAD (thread);
2264 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2266 if (!request_thread_abort (thread, state))
2269 if (thread == mono_thread_internal_current ()) {
2271 self_abort_internal (&error);
2272 mono_error_set_pending_exception (&error);
2274 async_abort_internal (thread, TRUE);
2279 * mono_thread_internal_abort:
2281 * Request thread @thread to be aborted.
2283 * @thread MUST NOT be the current thread.
2286 mono_thread_internal_abort (MonoInternalThread *thread)
2288 g_assert (thread != mono_thread_internal_current ());
2290 if (!request_thread_abort (thread, NULL))
2292 async_abort_internal (thread, TRUE);
2296 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2298 MonoInternalThread *thread = mono_thread_internal_current ();
2299 gboolean was_aborting;
2301 LOCK_THREAD (thread);
2302 was_aborting = thread->state & ThreadState_AbortRequested;
2303 thread->state &= ~ThreadState_AbortRequested;
2304 UNLOCK_THREAD (thread);
2306 if (!was_aborting) {
2307 const char *msg = "Unable to reset abort because no abort was requested";
2308 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2312 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2313 thread->abort_exc = NULL;
2314 if (thread->abort_state_handle) {
2315 mono_gchandle_free (thread->abort_state_handle);
2316 /* This is actually not necessary - the handle
2317 only counts if the exception is set */
2318 thread->abort_state_handle = 0;
2323 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2325 LOCK_THREAD (thread);
2327 thread->state &= ~ThreadState_AbortRequested;
2329 if (thread->abort_exc) {
2330 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2331 thread->abort_exc = NULL;
2332 if (thread->abort_state_handle) {
2333 mono_gchandle_free (thread->abort_state_handle);
2334 /* This is actually not necessary - the handle
2335 only counts if the exception is set */
2336 thread->abort_state_handle = 0;
2340 UNLOCK_THREAD (thread);
2344 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2347 MonoInternalThread *thread = this_obj->internal_thread;
2348 MonoObject *state, *deserialized = NULL;
2351 if (!thread->abort_state_handle)
2354 state = mono_gchandle_get_target (thread->abort_state_handle);
2357 domain = mono_domain_get ();
2358 if (mono_object_domain (state) == domain)
2361 deserialized = mono_object_xdomain_representation (state, domain, &error);
2363 if (!deserialized) {
2364 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2365 if (!is_ok (&error)) {
2366 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2367 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2369 mono_set_pending_exception (invalid_op_exc);
2373 return deserialized;
2377 mono_thread_suspend (MonoInternalThread *thread)
2379 LOCK_THREAD (thread);
2381 if ((thread->state & ThreadState_Unstarted) != 0 ||
2382 (thread->state & ThreadState_Aborted) != 0 ||
2383 (thread->state & ThreadState_Stopped) != 0)
2385 UNLOCK_THREAD (thread);
2389 if ((thread->state & ThreadState_Suspended) != 0 ||
2390 (thread->state & ThreadState_SuspendRequested) != 0 ||
2391 (thread->state & ThreadState_StopRequested) != 0)
2393 UNLOCK_THREAD (thread);
2397 thread->state |= ThreadState_SuspendRequested;
2398 mono_os_event_reset (thread->suspended);
2400 if (thread == mono_thread_internal_current ()) {
2401 /* calls UNLOCK_THREAD (thread) */
2402 self_suspend_internal ();
2404 /* calls UNLOCK_THREAD (thread) */
2405 async_suspend_internal (thread, FALSE);
2412 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2414 if (!mono_thread_suspend (this_obj->internal_thread)) {
2415 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2420 /* LOCKING: LOCK_THREAD(thread) must be held */
2422 mono_thread_resume (MonoInternalThread *thread)
2424 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2425 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2426 thread->state &= ~ThreadState_SuspendRequested;
2427 mono_os_event_set (thread->suspended);
2431 if ((thread->state & ThreadState_Suspended) == 0 ||
2432 (thread->state & ThreadState_Unstarted) != 0 ||
2433 (thread->state & ThreadState_Aborted) != 0 ||
2434 (thread->state & ThreadState_Stopped) != 0)
2436 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2440 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2442 mono_os_event_set (thread->suspended);
2444 if (!thread->self_suspended) {
2445 UNLOCK_THREAD (thread);
2447 /* Awake the thread */
2448 if (!mono_thread_info_resume (thread_get_tid (thread)))
2451 LOCK_THREAD (thread);
2454 thread->state &= ~ThreadState_Suspended;
2460 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2462 if (!thread->internal_thread) {
2463 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2465 LOCK_THREAD (thread->internal_thread);
2466 if (!mono_thread_resume (thread->internal_thread))
2467 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2468 UNLOCK_THREAD (thread->internal_thread);
2473 mono_threads_is_critical_method (MonoMethod *method)
2475 switch (method->wrapper_type) {
2476 case MONO_WRAPPER_RUNTIME_INVOKE:
2477 case MONO_WRAPPER_XDOMAIN_INVOKE:
2478 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2485 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2490 if (mono_threads_is_critical_method (m)) {
2491 *((gboolean*)data) = TRUE;
2498 is_running_protected_wrapper (void)
2500 gboolean found = FALSE;
2501 mono_stack_walk (find_wrapper, &found);
2506 request_thread_stop (MonoInternalThread *thread)
2508 LOCK_THREAD (thread);
2510 if ((thread->state & ThreadState_StopRequested) != 0 ||
2511 (thread->state & ThreadState_Stopped) != 0)
2513 UNLOCK_THREAD (thread);
2517 /* Make sure the thread is awake */
2518 mono_thread_resume (thread);
2520 thread->state |= ThreadState_StopRequested;
2521 thread->state &= ~ThreadState_AbortRequested;
2523 UNLOCK_THREAD (thread);
2528 * mono_thread_internal_stop:
2530 * Request thread @thread to stop.
2532 * @thread MUST NOT be the current thread.
2535 mono_thread_internal_stop (MonoInternalThread *thread)
2537 g_assert (thread != mono_thread_internal_current ());
2539 if (!request_thread_stop (thread))
2542 async_abort_internal (thread, TRUE);
2545 void mono_thread_stop (MonoThread *thread)
2547 MonoInternalThread *internal = thread->internal_thread;
2549 if (!request_thread_stop (internal))
2552 if (internal == mono_thread_internal_current ()) {
2554 self_abort_internal (&error);
2556 This function is part of the embeding API and has no way to return the exception
2557 to be thrown. So what we do is keep the old behavior and raise the exception.
2559 mono_error_raise_exception (&error); /* OK to throw, see note */
2561 async_abort_internal (internal, TRUE);
2566 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2568 gint8 tmp = *(volatile gint8 *)ptr;
2569 mono_memory_barrier ();
2574 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2576 gint16 tmp = *(volatile gint16 *)ptr;
2577 mono_memory_barrier ();
2582 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2584 gint32 tmp = *(volatile gint32 *)ptr;
2585 mono_memory_barrier ();
2590 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2592 gint64 tmp = *(volatile gint64 *)ptr;
2593 mono_memory_barrier ();
2598 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2600 volatile void *tmp = *(volatile void **)ptr;
2601 mono_memory_barrier ();
2602 return (void *) tmp;
2606 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2608 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2609 mono_memory_barrier ();
2610 return (MonoObject *) tmp;
2614 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2616 double tmp = *(volatile double *)ptr;
2617 mono_memory_barrier ();
2622 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2624 float tmp = *(volatile float *)ptr;
2625 mono_memory_barrier ();
2630 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2632 return InterlockedRead8 ((volatile gint8 *)ptr);
2636 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2638 return InterlockedRead16 ((volatile gint16 *)ptr);
2642 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2644 return InterlockedRead ((volatile gint32 *)ptr);
2648 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2650 #if SIZEOF_VOID_P == 4
2651 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2653 mono_interlocked_lock ();
2654 val = *(gint64*)ptr;
2655 mono_interlocked_unlock ();
2659 return InterlockedRead64 ((volatile gint64 *)ptr);
2663 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2665 return InterlockedReadPointer ((volatile gpointer *)ptr);
2669 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2673 #if SIZEOF_VOID_P == 4
2674 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2676 mono_interlocked_lock ();
2677 val = *(double*)ptr;
2678 mono_interlocked_unlock ();
2683 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2689 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2693 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2699 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2701 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2705 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2707 mono_memory_barrier ();
2708 *(volatile gint8 *)ptr = value;
2712 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2714 mono_memory_barrier ();
2715 *(volatile gint16 *)ptr = value;
2719 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2721 mono_memory_barrier ();
2722 *(volatile gint32 *)ptr = value;
2726 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2728 mono_memory_barrier ();
2729 *(volatile gint64 *)ptr = value;
2733 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2735 mono_memory_barrier ();
2736 *(volatile void **)ptr = value;
2740 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2742 mono_memory_barrier ();
2743 mono_gc_wbarrier_generic_store (ptr, value);
2747 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2749 mono_memory_barrier ();
2750 *(volatile double *)ptr = value;
2754 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2756 mono_memory_barrier ();
2757 *(volatile float *)ptr = value;
2761 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2763 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2767 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2769 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2773 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2775 InterlockedWrite ((volatile gint32 *)ptr, value);
2779 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2781 #if SIZEOF_VOID_P == 4
2782 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2783 mono_interlocked_lock ();
2784 *(gint64*)ptr = value;
2785 mono_interlocked_unlock ();
2790 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2794 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2796 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2800 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2804 #if SIZEOF_VOID_P == 4
2805 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2806 mono_interlocked_lock ();
2807 *(double*)ptr = value;
2808 mono_interlocked_unlock ();
2815 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2819 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2825 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2829 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2831 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2835 free_context (void *user_data)
2837 ContextStaticData *data = user_data;
2839 mono_threads_lock ();
2842 * There is no guarantee that, by the point this reference queue callback
2843 * has been invoked, the GC handle associated with the object will fail to
2844 * resolve as one might expect. So if we don't free and remove the GC
2845 * handle here, free_context_static_data_helper () could end up resolving
2846 * a GC handle to an actually-dead context which would contain a pointer
2847 * to an already-freed static data segment, resulting in a crash when
2850 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2852 mono_threads_unlock ();
2854 mono_gchandle_free (data->gc_handle);
2855 mono_free_static_data (data->static_data);
2860 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2862 mono_threads_lock ();
2864 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2867 contexts = g_hash_table_new (NULL, NULL);
2870 context_queue = mono_gc_reference_queue_new (free_context);
2872 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2873 g_hash_table_insert (contexts, gch, gch);
2876 * We use this intermediate structure to contain a duplicate pointer to
2877 * the static data because we can't rely on being able to resolve the GC
2878 * handle in the reference queue callback.
2880 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2881 data->gc_handle = GPOINTER_TO_UINT (gch);
2884 context_adjust_static_data (ctx);
2885 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2887 mono_threads_unlock ();
2889 mono_profiler_context_loaded (ctx);
2893 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2896 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2897 * cleanup in exceptional circumstances, we don't actually do any
2898 * cleanup work here. We instead do this via a reference queue.
2901 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2903 mono_profiler_context_unloaded (ctx);
2907 mono_thread_init_tls (void)
2909 MONO_FAST_TLS_INIT (tls_current_object);
2910 mono_native_tls_alloc (¤t_object_key, NULL);
2913 void mono_thread_init (MonoThreadStartCB start_cb,
2914 MonoThreadAttachCB attach_cb)
2916 mono_coop_mutex_init_recursive (&threads_mutex);
2918 mono_os_mutex_init_recursive(&interlocked_mutex);
2919 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2921 mono_os_event_init (&background_change_event, FALSE);
2923 mono_init_static_data_info (&thread_static_info);
2924 mono_init_static_data_info (&context_static_info);
2926 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2928 mono_thread_start_cb = start_cb;
2929 mono_thread_attach_cb = attach_cb;
2932 void mono_thread_cleanup (void)
2934 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
2935 /* The main thread must abandon any held mutexes (particularly
2936 * important for named mutexes as they are shared across
2937 * processes, see bug 74680.) This will happen when the
2938 * thread exits, but if it's not running in a subthread it
2939 * won't exit in time.
2941 mono_w32mutex_abandon ();
2945 /* This stuff needs more testing, it seems one of these
2946 * critical sections can be locked when mono_thread_cleanup is
2949 mono_coop_mutex_destroy (&threads_mutex);
2950 mono_os_mutex_destroy (&interlocked_mutex);
2951 mono_os_mutex_destroy (&delayed_free_table_mutex);
2952 mono_os_mutex_destroy (&small_id_mutex);
2953 mono_os_event_destroy (&background_change_event);
2956 mono_native_tls_free (current_object_key);
2960 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2962 mono_thread_cleanup_fn = func;
2966 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2968 thread->internal_thread->manage_callback = func;
2972 static void print_tids (gpointer key, gpointer value, gpointer user)
2974 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2975 * sizeof(uint) and a cast to uint would overflow
2977 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2978 * print this as a pointer.
2980 g_message ("Waiting for: %p", key);
2985 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2986 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2991 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
2994 MonoThreadInfoWaitRet ret;
2996 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2998 /* Add the thread state change event, so it wakes
2999 * up if a thread changes to background mode. */
3002 if (check_state_change)
3003 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3005 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3008 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3009 /* See the comment in build_wait_tids() */
3010 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3014 for( i = 0; i < wait->num; i++)
3015 mono_threads_close_thread_handle (wait->handles [i]);
3017 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3020 if (ret < wait->num) {
3021 MonoInternalThread *internal;
3023 internal = wait->threads [ret];
3025 mono_threads_lock ();
3026 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3027 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3028 mono_threads_unlock ();
3032 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3034 struct wait_data *wait=(struct wait_data *)user;
3036 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3037 MonoInternalThread *thread=(MonoInternalThread *)value;
3039 /* Ignore background threads, we abort them later */
3040 /* Do not lock here since it is not needed and the caller holds threads_lock */
3041 if (thread->state & ThreadState_Background) {
3042 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3043 return; /* just leave, ignore */
3046 if (mono_gc_is_finalizer_internal_thread (thread)) {
3047 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3051 if (thread == mono_thread_internal_current ()) {
3052 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3056 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3057 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3061 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3062 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3066 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3067 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3068 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3069 wait->threads[wait->num]=thread;
3072 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3074 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3079 /* Just ignore the rest, we can't do anything with
3086 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3088 struct wait_data *wait=(struct wait_data *)user;
3089 MonoNativeThreadId self = mono_native_thread_id_get ();
3090 MonoInternalThread *thread = (MonoInternalThread *)value;
3092 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3095 /* The finalizer thread is not a background thread */
3096 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3097 && (thread->state & ThreadState_Background) != 0
3098 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3100 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3101 wait->threads[wait->num] = thread;
3104 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3105 mono_thread_internal_abort (thread);
3109 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3110 && !mono_gc_is_finalizer_internal_thread (thread);
3114 * mono_threads_set_shutting_down:
3116 * Is called by a thread that wants to shut down Mono. If the runtime is already
3117 * shutting down, the calling thread is suspended/stopped, and this function never
3121 mono_threads_set_shutting_down (void)
3123 MonoInternalThread *current_thread = mono_thread_internal_current ();
3125 mono_threads_lock ();
3127 if (shutting_down) {
3128 mono_threads_unlock ();
3130 /* Make sure we're properly suspended/stopped */
3132 LOCK_THREAD (current_thread);
3134 if ((current_thread->state & ThreadState_SuspendRequested) ||
3135 (current_thread->state & ThreadState_AbortRequested) ||
3136 (current_thread->state & ThreadState_StopRequested)) {
3137 UNLOCK_THREAD (current_thread);
3138 mono_thread_execute_interruption ();
3140 current_thread->state |= ThreadState_Stopped;
3141 UNLOCK_THREAD (current_thread);
3144 /*since we're killing the thread, detach it.*/
3145 mono_thread_detach_internal (current_thread);
3147 /* Wake up other threads potentially waiting for us */
3148 mono_thread_info_exit (0);
3150 shutting_down = TRUE;
3152 /* Not really a background state change, but this will
3153 * interrupt the main thread if it is waiting for all
3154 * the other threads.
3156 mono_os_event_set (&background_change_event);
3158 mono_threads_unlock ();
3162 void mono_thread_manage (void)
3164 struct wait_data wait_data;
3165 struct wait_data *wait = &wait_data;
3167 memset (wait, 0, sizeof (struct wait_data));
3168 /* join each thread that's still running */
3169 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3171 mono_threads_lock ();
3173 THREAD_DEBUG (g_message("%s: No threads", __func__));
3174 mono_threads_unlock ();
3177 mono_threads_unlock ();
3180 mono_threads_lock ();
3181 if (shutting_down) {
3182 /* somebody else is shutting down */
3183 mono_threads_unlock ();
3186 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3187 mono_g_hash_table_foreach (threads, print_tids, NULL));
3189 mono_os_event_reset (&background_change_event);
3191 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3192 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3193 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3194 mono_threads_unlock ();
3196 /* Something to wait for */
3197 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3198 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3199 } while(wait->num>0);
3201 /* Mono is shutting down, so just wait for the end */
3202 if (!mono_runtime_try_shutdown ()) {
3203 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3204 mono_thread_suspend (mono_thread_internal_current ());
3205 mono_thread_execute_interruption ();
3209 * Remove everything but the finalizer thread and self.
3210 * Also abort all the background threads
3213 mono_threads_lock ();
3216 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3217 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3218 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3220 mono_threads_unlock ();
3222 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3223 if (wait->num > 0) {
3224 /* Something to wait for */
3225 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3227 } while (wait->num > 0);
3230 * give the subthreads a chance to really quit (this is mainly needed
3231 * to get correct user and system times from getrusage/wait/time(1)).
3232 * This could be removed if we avoid pthread_detach() and use pthread_join().
3234 mono_thread_info_yield ();
3238 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3240 MonoInternalThread *thread = (MonoInternalThread*)value;
3241 struct wait_data *wait = (struct wait_data*)user_data;
3244 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3246 * This needs no locking.
3248 if ((thread->state & ThreadState_Suspended) != 0 ||
3249 (thread->state & ThreadState_Stopped) != 0)
3252 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3253 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3254 wait->threads [wait->num] = thread;
3260 * mono_thread_suspend_all_other_threads:
3262 * Suspend all managed threads except the finalizer thread and this thread. It is
3263 * not possible to resume them later.
3265 void mono_thread_suspend_all_other_threads (void)
3267 struct wait_data wait_data;
3268 struct wait_data *wait = &wait_data;
3270 MonoNativeThreadId self = mono_native_thread_id_get ();
3271 guint32 eventidx = 0;
3272 gboolean starting, finished;
3274 memset (wait, 0, sizeof (struct wait_data));
3276 * The other threads could be in an arbitrary state at this point, i.e.
3277 * they could be starting up, shutting down etc. This means that there could be
3278 * threads which are not even in the threads hash table yet.
3282 * First we set a barrier which will be checked by all threads before they
3283 * are added to the threads hash table, and they will exit if the flag is set.
3284 * This ensures that no threads could be added to the hash later.
3285 * We will use shutting_down as the barrier for now.
3287 g_assert (shutting_down);
3290 * We make multiple calls to WaitForMultipleObjects since:
3291 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3292 * - some threads could exit without becoming suspended
3297 * Make a copy of the hashtable since we can't do anything with
3298 * threads while threads_mutex is held.
3301 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3302 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3303 mono_threads_lock ();
3304 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3305 mono_threads_unlock ();
3308 /* Get the suspended events that we'll be waiting for */
3309 for (i = 0; i < wait->num; ++i) {
3310 MonoInternalThread *thread = wait->threads [i];
3312 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3313 || mono_gc_is_finalizer_internal_thread (thread)
3314 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3316 mono_threads_close_thread_handle (wait->handles [i]);
3317 wait->threads [i] = NULL;
3321 LOCK_THREAD (thread);
3323 if ((thread->state & ThreadState_Suspended) != 0 ||
3324 (thread->state & ThreadState_StopRequested) != 0 ||
3325 (thread->state & ThreadState_Stopped) != 0) {
3326 UNLOCK_THREAD (thread);
3327 mono_threads_close_thread_handle (wait->handles [i]);
3328 wait->threads [i] = NULL;
3334 /* Convert abort requests into suspend requests */
3335 if ((thread->state & ThreadState_AbortRequested) != 0)
3336 thread->state &= ~ThreadState_AbortRequested;
3338 thread->state |= ThreadState_SuspendRequested;
3339 mono_os_event_reset (thread->suspended);
3341 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3342 async_suspend_internal (thread, TRUE);
3344 mono_threads_close_thread_handle (wait->handles [i]);
3345 wait->threads [i] = NULL;
3347 if (eventidx <= 0) {
3349 * If there are threads which are starting up, we wait until they
3350 * are suspended when they try to register in the threads hash.
3351 * This is guaranteed to finish, since the threads which can create new
3352 * threads get suspended after a while.
3353 * FIXME: The finalizer thread can still create new threads.
3355 mono_threads_lock ();
3356 if (threads_starting_up)
3357 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3360 mono_threads_unlock ();
3362 mono_thread_info_sleep (100, NULL);
3370 MonoInternalThread *thread;
3371 MonoStackFrameInfo *frames;
3372 int nframes, max_frames;
3373 int nthreads, max_threads;
3374 MonoInternalThread **threads;
3375 } ThreadDumpUserData;
3377 static gboolean thread_dump_requested;
3379 /* This needs to be async safe */
3381 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3383 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3385 if (ud->nframes < ud->max_frames) {
3386 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3393 /* This needs to be async safe */
3394 static SuspendThreadResult
3395 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3397 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3398 MonoInternalThread *thread = user_data->thread;
3401 /* This no longer works with remote unwinding */
3402 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3403 mono_thread_internal_describe (thread, text);
3404 g_string_append (text, "\n");
3407 if (thread == mono_thread_internal_current ())
3408 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3410 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3412 return MonoResumeThread;
3416 int nthreads, max_threads;
3417 MonoInternalThread **threads;
3418 } CollectThreadsUserData;
3421 collect_thread (gpointer key, gpointer value, gpointer user)
3423 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3424 MonoInternalThread *thread = (MonoInternalThread *)value;
3426 if (ud->nthreads < ud->max_threads)
3427 ud->threads [ud->nthreads ++] = thread;
3431 * Collect running threads into the THREADS array.
3432 * THREADS should be an array allocated on the stack.
3435 collect_threads (MonoInternalThread **thread_array, int max_threads)
3437 CollectThreadsUserData ud;
3439 memset (&ud, 0, sizeof (ud));
3440 /* This array contains refs, but its on the stack, so its ok */
3441 ud.threads = thread_array;
3442 ud.max_threads = max_threads;
3444 mono_threads_lock ();
3445 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3446 mono_threads_unlock ();
3452 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3454 GString* text = g_string_new (0);
3456 GError *error = NULL;
3459 ud->thread = thread;
3462 /* Collect frames for the thread */
3463 if (thread == mono_thread_internal_current ()) {
3464 get_thread_dump (mono_thread_info_current (), ud);
3466 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3470 * Do all the non async-safe work outside of get_thread_dump.
3473 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3475 g_string_append_printf (text, "\n\"%s\"", name);
3478 else if (thread->threadpool_thread) {
3479 g_string_append (text, "\n\"<threadpool thread>\"");
3481 g_string_append (text, "\n\"<unnamed thread>\"");
3484 for (i = 0; i < ud->nframes; ++i) {
3485 MonoStackFrameInfo *frame = &ud->frames [i];
3486 MonoMethod *method = NULL;
3488 if (frame->type == FRAME_TYPE_MANAGED)
3489 method = mono_jit_info_get_method (frame->ji);
3492 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3493 g_string_append_printf (text, " %s\n", location);
3496 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3500 fprintf (stdout, "%s", text->str);
3502 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3503 OutputDebugStringA(text->str);
3506 g_string_free (text, TRUE);
3511 mono_threads_perform_thread_dump (void)
3513 ThreadDumpUserData ud;
3514 MonoInternalThread *thread_array [128];
3515 int tindex, nthreads;
3517 if (!thread_dump_requested)
3520 printf ("Full thread dump:\n");
3522 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3523 nthreads = collect_threads (thread_array, 128);
3525 memset (&ud, 0, sizeof (ud));
3526 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3527 ud.max_frames = 256;
3529 for (tindex = 0; tindex < nthreads; ++tindex)
3530 dump_thread (thread_array [tindex], &ud);
3534 thread_dump_requested = FALSE;
3537 /* Obtain the thread dump of all threads */
3539 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3542 ThreadDumpUserData ud;
3543 MonoInternalThread *thread_array [128];
3544 MonoDomain *domain = mono_domain_get ();
3545 MonoDebugSourceLocation *location;
3546 int tindex, nthreads;
3548 mono_error_init (error);
3550 *out_threads = NULL;
3551 *out_stack_frames = NULL;
3553 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3554 nthreads = collect_threads (thread_array, 128);
3556 memset (&ud, 0, sizeof (ud));
3557 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3558 ud.max_frames = 256;
3560 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3563 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3567 for (tindex = 0; tindex < nthreads; ++tindex) {
3568 MonoInternalThread *thread = thread_array [tindex];
3569 MonoArray *thread_frames;
3575 /* Collect frames for the thread */
3576 if (thread == mono_thread_internal_current ()) {
3577 get_thread_dump (mono_thread_info_current (), &ud);
3579 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3582 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3584 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3587 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3589 for (i = 0; i < ud.nframes; ++i) {
3590 MonoStackFrameInfo *frame = &ud.frames [i];
3591 MonoMethod *method = NULL;
3592 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3596 sf->native_offset = frame->native_offset;
3598 if (frame->type == FRAME_TYPE_MANAGED)
3599 method = mono_jit_info_get_method (frame->ji);
3602 sf->method_address = (gsize) frame->ji->code_start;
3604 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3607 MONO_OBJECT_SETREF (sf, method, rm);
3609 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3611 sf->il_offset = location->il_offset;
3613 if (location && location->source_file) {
3614 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3615 sf->line = location->row;
3616 sf->column = location->column;
3618 mono_debug_free_source_location (location);
3623 mono_array_setref (thread_frames, i, sf);
3629 return is_ok (error);
3633 * mono_threads_request_thread_dump:
3635 * Ask all threads except the current to print their stacktrace to stdout.
3638 mono_threads_request_thread_dump (void)
3640 /*The new thread dump code runs out of the finalizer thread. */
3641 thread_dump_requested = TRUE;
3642 mono_gc_finalize_notify ();
3647 gint allocated; /* +1 so that refs [allocated] == NULL */
3651 typedef struct ref_stack RefStack;
3654 ref_stack_new (gint initial_size)
3658 initial_size = MAX (initial_size, 16) + 1;
3659 rs = g_new0 (RefStack, 1);
3660 rs->refs = g_new0 (gpointer, initial_size);
3661 rs->allocated = initial_size;
3666 ref_stack_destroy (gpointer ptr)
3668 RefStack *rs = (RefStack *)ptr;
3677 ref_stack_push (RefStack *rs, gpointer ptr)
3679 g_assert (rs != NULL);
3681 if (rs->bottom >= rs->allocated) {
3682 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3683 rs->allocated <<= 1;
3684 rs->refs [rs->allocated] = NULL;
3686 rs->refs [rs->bottom++] = ptr;
3690 ref_stack_pop (RefStack *rs)
3692 if (rs == NULL || rs->bottom == 0)
3696 rs->refs [rs->bottom] = NULL;
3700 ref_stack_find (RefStack *rs, gpointer ptr)
3707 for (refs = rs->refs; refs && *refs; refs++) {
3715 * mono_thread_push_appdomain_ref:
3717 * Register that the current thread may have references to objects in domain
3718 * @domain on its stack. Each call to this function should be paired with a
3719 * call to pop_appdomain_ref.
3722 mono_thread_push_appdomain_ref (MonoDomain *domain)
3724 MonoInternalThread *thread = mono_thread_internal_current ();
3727 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3728 SPIN_LOCK (thread->lock_thread_id);
3729 if (thread->appdomain_refs == NULL)
3730 thread->appdomain_refs = ref_stack_new (16);
3731 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3732 SPIN_UNLOCK (thread->lock_thread_id);
3737 mono_thread_pop_appdomain_ref (void)
3739 MonoInternalThread *thread = mono_thread_internal_current ();
3742 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3743 SPIN_LOCK (thread->lock_thread_id);
3744 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3745 SPIN_UNLOCK (thread->lock_thread_id);
3750 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3753 SPIN_LOCK (thread->lock_thread_id);
3754 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3755 SPIN_UNLOCK (thread->lock_thread_id);
3760 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3762 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3765 typedef struct abort_appdomain_data {
3766 struct wait_data wait;
3768 } abort_appdomain_data;
3771 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3773 MonoInternalThread *thread = (MonoInternalThread*)value;
3774 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3775 MonoDomain *domain = data->domain;
3777 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3778 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3780 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3781 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3782 data->wait.threads [data->wait.num] = thread;
3785 /* Just ignore the rest, we can't do anything with
3793 * mono_threads_abort_appdomain_threads:
3795 * Abort threads which has references to the given appdomain.
3798 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3800 #ifdef __native_client__
3804 abort_appdomain_data user_data;
3806 int orig_timeout = timeout;
3809 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3811 start_time = mono_msec_ticks ();
3813 mono_threads_lock ();
3815 user_data.domain = domain;
3816 user_data.wait.num = 0;
3817 /* This shouldn't take any locks */
3818 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3819 mono_threads_unlock ();
3821 if (user_data.wait.num > 0) {
3822 /* Abort the threads outside the threads lock */
3823 for (i = 0; i < user_data.wait.num; ++i)
3824 mono_thread_internal_abort (user_data.wait.threads [i]);
3827 * We should wait for the threads either to abort, or to leave the
3828 * domain. We can't do the latter, so we wait with a timeout.
3830 wait_for_tids (&user_data.wait, 100, FALSE);
3833 /* Update remaining time */
3834 timeout -= mono_msec_ticks () - start_time;
3835 start_time = mono_msec_ticks ();
3837 if (orig_timeout != -1 && timeout < 0)
3840 while (user_data.wait.num > 0);
3842 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3848 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3850 MonoInternalThread *thread = (MonoInternalThread*)value;
3851 MonoDomain *domain = (MonoDomain*)user_data;
3854 /* No locking needed here */
3855 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3857 if (thread->cached_culture_info) {
3858 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3859 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3860 if (obj && obj->vtable->domain == domain)
3861 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3867 * mono_threads_clear_cached_culture:
3869 * Clear the cached_current_culture from all threads if it is in the
3873 mono_threads_clear_cached_culture (MonoDomain *domain)
3875 mono_threads_lock ();
3876 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3877 mono_threads_unlock ();
3881 * mono_thread_get_undeniable_exception:
3883 * Return an exception which needs to be raised when leaving a catch clause.
3884 * This is used for undeniable exception propagation.
3887 mono_thread_get_undeniable_exception (void)
3889 MonoInternalThread *thread = mono_thread_internal_current ();
3891 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3894 // We don't want to have our exception effect calls made by
3895 // the catching block
3897 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3901 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3902 * exception if the thread no longer references a dying appdomain.
3904 thread->abort_exc->trace_ips = NULL;
3905 thread->abort_exc->stack_trace = NULL;
3906 return thread->abort_exc;
3909 #if MONO_SMALL_CONFIG
3910 #define NUM_STATIC_DATA_IDX 4
3911 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3915 #define NUM_STATIC_DATA_IDX 8
3916 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3917 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3921 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3922 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3925 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3927 gpointer *static_data = (gpointer *)addr;
3929 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3930 void **ptr = (void **)static_data [i];
3935 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3936 void **p = ptr + idx;
3939 mark_func ((MonoObject**)p, gc_data);
3945 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3947 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3951 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3953 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3957 * mono_alloc_static_data
3959 * Allocate memory blocks for storing threads or context static data
3962 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3964 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3967 gpointer* static_data = *static_data_ptr;
3969 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3970 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3972 if (mono_gc_user_markers_supported ()) {
3973 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3974 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3976 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3977 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3980 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3981 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3982 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3983 *static_data_ptr = static_data;
3984 static_data [0] = static_data;
3987 for (i = 1; i <= idx; ++i) {
3988 if (static_data [i])
3991 if (mono_gc_user_markers_supported ())
3992 static_data [i] = g_malloc0 (static_data_size [i]);
3994 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3995 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3996 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4001 mono_free_static_data (gpointer* static_data)
4004 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4005 gpointer p = static_data [i];
4009 * At this point, the static data pointer array is still registered with the
4010 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4011 * data. Freeing the individual arrays without first nulling their slots
4012 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4013 * such an already freed array. See bug #13813.
4015 static_data [i] = NULL;
4016 mono_memory_write_barrier ();
4017 if (mono_gc_user_markers_supported ())
4020 mono_gc_free_fixed (p);
4022 mono_gc_free_fixed (static_data);
4026 * mono_init_static_data_info
4028 * Initializes static data counters
4030 static void mono_init_static_data_info (StaticDataInfo *static_data)
4032 static_data->idx = 0;
4033 static_data->offset = 0;
4034 static_data->freelist = NULL;
4038 * mono_alloc_static_data_slot
4040 * Generates an offset for static data. static_data contains the counters
4041 * used to generate it.
4044 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4046 if (!static_data->idx && !static_data->offset) {
4048 * we use the first chunk of the first allocation also as
4049 * an array for the rest of the data
4051 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4053 static_data->offset += align - 1;
4054 static_data->offset &= ~(align - 1);
4055 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4056 static_data->idx ++;
4057 g_assert (size <= static_data_size [static_data->idx]);
4058 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4059 static_data->offset = 0;
4061 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4062 static_data->offset += size;
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 static void CALLBACK dummy_apc (ULONG_PTR param)
4338 * mono_thread_execute_interruption
4340 * Performs the operation that the requested thread state requires (abort,
4343 static MonoException*
4344 mono_thread_execute_interruption (void)
4346 MonoInternalThread *thread = mono_thread_internal_current ();
4347 MonoThread *sys_thread = mono_thread_current ();
4349 LOCK_THREAD (thread);
4351 /* MonoThread::interruption_requested can only be changed with atomics */
4352 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4353 /* this will consume pending APC calls */
4355 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4357 InterlockedDecrement (&thread_interruption_requested);
4359 /* Clear the interrupted flag of the thread so it can wait again */
4360 mono_thread_info_clear_self_interrupt ();
4363 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4364 if (sys_thread->pending_exception) {
4367 exc = sys_thread->pending_exception;
4368 sys_thread->pending_exception = NULL;
4370 UNLOCK_THREAD (thread);
4372 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4373 UNLOCK_THREAD (thread);
4374 g_assert (sys_thread->pending_exception == NULL);
4375 if (thread->abort_exc == NULL) {
4377 * This might be racy, but it has to be called outside the lock
4378 * since it calls managed code.
4380 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4382 return thread->abort_exc;
4384 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4385 /* calls UNLOCK_THREAD (thread) */
4386 self_suspend_internal ();
4389 else if ((thread->state & ThreadState_StopRequested) != 0) {
4390 /* FIXME: do this through the JIT? */
4392 UNLOCK_THREAD (thread);
4394 mono_thread_exit ();
4396 } else if (thread->thread_interrupt_requested) {
4398 thread->thread_interrupt_requested = FALSE;
4399 UNLOCK_THREAD (thread);
4401 return(mono_get_exception_thread_interrupted ());
4404 UNLOCK_THREAD (thread);
4410 * mono_thread_request_interruption
4412 * A signal handler can call this method to request the interruption of a
4413 * thread. The result of the interruption will depend on the current state of
4414 * the thread. If the result is an exception that needs to be throw, it is
4415 * provided as return value.
4418 mono_thread_request_interruption (gboolean running_managed)
4420 MonoInternalThread *thread = mono_thread_internal_current ();
4422 /* The thread may already be stopping */
4427 if (thread->interrupt_on_stop &&
4428 thread->state & ThreadState_StopRequested &&
4429 thread->state & ThreadState_Background)
4432 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4434 InterlockedIncrement (&thread_interruption_requested);
4436 if (!running_managed || is_running_protected_wrapper ()) {
4437 /* Can't stop while in unmanaged code. Increase the global interruption
4438 request count. When exiting the unmanaged method the count will be
4439 checked and the thread will be interrupted. */
4441 /* this will awake the thread if it is in WaitForSingleObject
4443 /* Our implementation of this function ignores the func argument */
4445 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4447 mono_thread_info_self_interrupt ();
4452 return mono_thread_execute_interruption ();
4456 /*This function should be called by a thread after it has exited all of
4457 * its handle blocks at interruption time.*/
4459 mono_thread_resume_interruption (void)
4461 MonoInternalThread *thread = mono_thread_internal_current ();
4462 gboolean still_aborting;
4464 /* The thread may already be stopping */
4468 LOCK_THREAD (thread);
4469 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4470 UNLOCK_THREAD (thread);
4472 /*This can happen if the protected block called Thread::ResetAbort*/
4473 if (!still_aborting)
4476 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4478 InterlockedIncrement (&thread_interruption_requested);
4480 mono_thread_info_self_interrupt ();
4482 return mono_thread_execute_interruption ();
4485 gboolean mono_thread_interruption_requested ()
4487 if (thread_interruption_requested) {
4488 MonoInternalThread *thread = mono_thread_internal_current ();
4489 /* The thread may already be stopping */
4491 return (thread->interruption_requested);
4496 static MonoException*
4497 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4499 MonoInternalThread *thread = mono_thread_internal_current ();
4501 /* The thread may already be stopping */
4504 if (!thread->interruption_requested)
4506 if (!bypass_abort_protection && is_running_protected_wrapper ())
4509 return mono_thread_execute_interruption ();
4513 * Performs the interruption of the current thread, if one has been requested,
4514 * and the thread is not running a protected wrapper.
4515 * Return the exception which needs to be thrown, if any.
4518 mono_thread_interruption_checkpoint (void)
4520 return mono_thread_interruption_checkpoint_request (FALSE);
4524 * Performs the interruption of the current thread, if one has been requested.
4525 * Return the exception which needs to be thrown, if any.
4528 mono_thread_force_interruption_checkpoint_noraise (void)
4530 return mono_thread_interruption_checkpoint_request (TRUE);
4534 * mono_set_pending_exception:
4536 * Set the pending exception of the current thread to EXC.
4537 * The exception will be thrown when execution returns to managed code.
4540 mono_set_pending_exception (MonoException *exc)
4542 MonoThread *thread = mono_thread_current ();
4544 /* The thread may already be stopping */
4548 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4550 mono_thread_request_interruption (FALSE);
4554 * mono_thread_interruption_request_flag:
4556 * Returns the address of a flag that will be non-zero if an interruption has
4557 * been requested for a thread. The thread to interrupt may not be the current
4558 * thread, so an additional call to mono_thread_interruption_requested() or
4559 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4562 gint32* mono_thread_interruption_request_flag ()
4564 return &thread_interruption_requested;
4568 mono_thread_init_apartment_state (void)
4571 MonoInternalThread* thread = mono_thread_internal_current ();
4573 /* Positive return value indicates success, either
4574 * S_OK if this is first CoInitialize call, or
4575 * S_FALSE if CoInitialize already called, but with same
4576 * threading model. A negative value indicates failure,
4577 * probably due to trying to change the threading model.
4579 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4580 ? COINIT_APARTMENTTHREADED
4581 : COINIT_MULTITHREADED) < 0) {
4582 thread->apartment_state = ThreadApartmentState_Unknown;
4588 mono_thread_cleanup_apartment_state (void)
4591 MonoInternalThread* thread = mono_thread_internal_current ();
4593 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4600 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4602 LOCK_THREAD (thread);
4603 thread->state |= state;
4604 UNLOCK_THREAD (thread);
4608 * mono_thread_test_and_set_state:
4610 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4612 * Returns TRUE is @set was OR'd in.
4615 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4617 LOCK_THREAD (thread);
4619 if ((thread->state & test) != 0) {
4620 UNLOCK_THREAD (thread);
4624 thread->state |= set;
4625 UNLOCK_THREAD (thread);
4631 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4633 LOCK_THREAD (thread);
4634 thread->state &= ~state;
4635 UNLOCK_THREAD (thread);
4639 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4641 gboolean ret = FALSE;
4643 LOCK_THREAD (thread);
4645 if ((thread->state & test) != 0) {
4649 UNLOCK_THREAD (thread);
4654 static gboolean has_tls_get = FALSE;
4657 mono_runtime_set_has_tls_get (gboolean val)
4663 mono_runtime_has_tls_get (void)
4669 self_interrupt_thread (void *_unused)
4672 MonoThreadInfo *info;
4674 exc = mono_thread_execute_interruption ();
4676 if (mono_threads_is_coop_enabled ()) {
4677 /* We can return from an async call in coop, as
4678 * it's simply called when exiting the safepoint */
4682 g_error ("%s: we can't resume from an async call", __func__);
4685 info = mono_thread_info_current ();
4687 /* We must use _with_context since we didn't trampoline into the runtime */
4688 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. */
4692 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4696 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4700 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4702 MonoJitInfo **dest = (MonoJitInfo **)data;
4708 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4710 MonoJitInfo *ji = NULL;
4715 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4716 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4717 * where we hold runtime locks.
4719 if (!mono_threads_is_coop_enabled ())
4720 mono_thread_info_set_is_async_context (TRUE);
4721 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4722 if (!mono_threads_is_coop_enabled ())
4723 mono_thread_info_set_is_async_context (FALSE);
4728 MonoInternalThread *thread;
4729 gboolean install_async_abort;
4730 MonoThreadInfoInterruptToken *interrupt_token;
4733 static SuspendThreadResult
4734 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4736 AbortThreadData *data = (AbortThreadData *)ud;
4737 MonoInternalThread *thread = data->thread;
4738 MonoJitInfo *ji = NULL;
4739 gboolean protected_wrapper;
4740 gboolean running_managed;
4742 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4743 return MonoResumeThread;
4746 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4747 The protected block code will give them a chance when appropriate.
4749 if (thread->abort_protected_block_count)
4750 return MonoResumeThread;
4752 /*someone is already interrupting it*/
4753 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4754 return MonoResumeThread;
4756 InterlockedIncrement (&thread_interruption_requested);
4758 ji = mono_thread_info_get_last_managed (info);
4759 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4760 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4762 if (!protected_wrapper && running_managed) {
4763 /*We are in managed code*/
4764 /*Set the thread to call */
4765 if (data->install_async_abort)
4766 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4767 return MonoResumeThread;
4770 * This will cause waits to be broken.
4771 * It will also prevent the thread from entering a wait, so if the thread returns
4772 * from the wait before it receives the abort signal, it will just spin in the wait
4773 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4776 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4778 return MonoResumeThread;
4783 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4785 AbortThreadData data;
4787 g_assert (thread != mono_thread_internal_current ());
4789 data.thread = thread;
4790 data.install_async_abort = install_async_abort;
4791 data.interrupt_token = NULL;
4793 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4794 if (data.interrupt_token)
4795 mono_thread_info_finish_interrupt (data.interrupt_token);
4796 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4800 self_abort_internal (MonoError *error)
4804 mono_error_init (error);
4806 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4807 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4810 Self aborts ignore the protected block logic and raise the TAE regardless. This is verified by one of the tests in mono/tests/abort-cctor.cs.
4812 exc = mono_thread_request_interruption (TRUE);
4814 mono_error_set_exception_instance (error, exc);
4816 mono_thread_info_self_interrupt ();
4820 MonoInternalThread *thread;
4822 MonoThreadInfoInterruptToken *interrupt_token;
4823 } SuspendThreadData;
4825 static SuspendThreadResult
4826 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4828 SuspendThreadData *data = (SuspendThreadData *)ud;
4829 MonoInternalThread *thread = data->thread;
4830 MonoJitInfo *ji = NULL;
4831 gboolean protected_wrapper;
4832 gboolean running_managed;
4834 ji = mono_thread_info_get_last_managed (info);
4835 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4836 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4838 if (running_managed && !protected_wrapper) {
4839 if (mono_threads_is_coop_enabled ()) {
4840 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4841 return MonoResumeThread;
4843 thread->state &= ~ThreadState_SuspendRequested;
4844 thread->state |= ThreadState_Suspended;
4845 return KeepSuspended;
4848 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4849 InterlockedIncrement (&thread_interruption_requested);
4850 if (data->interrupt)
4851 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4853 return MonoResumeThread;
4857 /* LOCKING: called with @thread synch_cs held, and releases it */
4859 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4861 SuspendThreadData data;
4863 g_assert (thread != mono_thread_internal_current ());
4865 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4867 thread->self_suspended = FALSE;
4869 data.thread = thread;
4870 data.interrupt = interrupt;
4871 data.interrupt_token = NULL;
4873 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4874 if (data.interrupt_token)
4875 mono_thread_info_finish_interrupt (data.interrupt_token);
4877 UNLOCK_THREAD (thread);
4880 /* LOCKING: called with @thread synch_cs held, and releases it */
4882 self_suspend_internal (void)
4884 MonoInternalThread *thread;
4886 MonoOSEventWaitRet res;
4888 thread = mono_thread_internal_current ();
4890 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4892 thread->self_suspended = TRUE;
4894 thread->state &= ~ThreadState_SuspendRequested;
4895 thread->state |= ThreadState_Suspended;
4897 UNLOCK_THREAD (thread);
4899 event = thread->suspended;
4902 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT);
4903 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4908 * mono_thread_is_foreign:
4909 * @thread: the thread to query
4911 * This function allows one to determine if a thread was created by the mono runtime and has
4912 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4914 * Returns: TRUE if @thread was not created by the runtime.
4917 mono_thread_is_foreign (MonoThread *thread)
4919 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4920 return info->runtime_thread == FALSE;
4924 * mono_add_joinable_thread:
4926 * Add TID to the list of joinable threads.
4927 * LOCKING: Acquires the threads lock.
4930 mono_threads_add_joinable_thread (gpointer tid)
4934 * We cannot detach from threads because it causes problems like
4935 * 2fd16f60/r114307. So we collect them and join them when
4936 * we have time (in he finalizer thread).
4938 joinable_threads_lock ();
4939 if (!joinable_threads)
4940 joinable_threads = g_hash_table_new (NULL, NULL);
4941 g_hash_table_insert (joinable_threads, tid, tid);
4942 joinable_thread_count ++;
4943 joinable_threads_unlock ();
4945 mono_gc_finalize_notify ();
4950 * mono_threads_join_threads:
4952 * Join all joinable threads. This is called from the finalizer thread.
4953 * LOCKING: Acquires the threads lock.
4956 mono_threads_join_threads (void)
4959 GHashTableIter iter;
4966 if (!joinable_thread_count)
4970 joinable_threads_lock ();
4972 if (g_hash_table_size (joinable_threads)) {
4973 g_hash_table_iter_init (&iter, joinable_threads);
4974 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4975 thread = (pthread_t)tid;
4976 g_hash_table_remove (joinable_threads, key);
4977 joinable_thread_count --;
4980 joinable_threads_unlock ();
4982 if (thread != pthread_self ()) {
4984 /* This shouldn't block */
4985 mono_native_thread_join (thread);
4998 * Wait for thread TID to exit.
4999 * LOCKING: Acquires the threads lock.
5002 mono_thread_join (gpointer tid)
5006 gboolean found = FALSE;
5008 joinable_threads_lock ();
5009 if (!joinable_threads)
5010 joinable_threads = g_hash_table_new (NULL, NULL);
5011 if (g_hash_table_lookup (joinable_threads, tid)) {
5012 g_hash_table_remove (joinable_threads, tid);
5013 joinable_thread_count --;
5016 joinable_threads_unlock ();
5019 thread = (pthread_t)tid;
5021 mono_native_thread_join (thread);
5027 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5029 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5030 mono_thread_interruption_checkpoint ();
5034 mono_thread_internal_unhandled_exception (MonoObject* exc)
5036 MonoClass *klass = exc->vtable->klass;
5037 if (is_threadabort_exception (klass)) {
5038 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5039 } else if (!is_appdomainunloaded_exception (klass)
5040 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5041 mono_unhandled_exception (exc);
5042 if (mono_environment_exitcode_get () == 1) {
5043 mono_environment_exitcode_set (255);
5044 mono_invoke_unhandled_exception_hook (exc);
5045 g_assert_not_reached ();
5051 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5054 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5055 mono_error_set_pending_exception (&error);
5059 * mono_threads_attach_coop: called by native->managed wrappers
5063 * - @return: the original domain which needs to be restored, or NULL.
5066 * - @dummy: contains the original domain
5067 * - @return: a cookie containing current MonoThreadInfo*.
5070 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5073 gboolean fresh_thread = FALSE;
5076 /* Happens when called from AOTed code which is only used in the root domain. */
5077 domain = mono_get_root_domain ();
5082 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5083 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5084 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5085 * we're only responsible for making the cookie. */
5086 if (mono_threads_is_coop_enabled ()) {
5087 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5088 fresh_thread = !info || !mono_thread_info_is_live (info);
5091 if (!mono_thread_internal_current ()) {
5092 mono_thread_attach_full (domain, FALSE);
5095 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5098 orig = mono_domain_get ();
5100 mono_domain_set (domain, TRUE);
5102 if (!mono_threads_is_coop_enabled ())
5103 return orig != domain ? orig : NULL;
5107 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5108 * return the right cookie. */
5109 return mono_threads_enter_gc_unsafe_region_cookie ();
5112 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5113 return mono_threads_enter_gc_unsafe_region (dummy);
5118 * mono_threads_detach_coop: called by native->managed wrappers
5121 * - @cookie: the original domain which needs to be restored, or NULL.
5125 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5126 * - @dummy: contains the original domain
5129 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5131 MonoDomain *domain, *orig;
5133 if (!mono_threads_is_coop_enabled ()) {
5134 orig = (MonoDomain*) cookie;
5136 mono_domain_set (orig, TRUE);
5138 orig = (MonoDomain*) *dummy;
5140 domain = mono_domain_get ();
5143 /* it won't do anything if cookie is NULL
5144 * thread state RUNNING -> (RUNNING|BLOCKING) */
5145 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5147 if (orig != domain) {
5149 mono_domain_unset ();
5151 mono_domain_set (orig, TRUE);
5157 mono_threads_begin_abort_protected_block (void)
5159 MonoInternalThread *thread;
5161 thread = mono_thread_internal_current ();
5162 ++thread->abort_protected_block_count;
5163 mono_memory_barrier ();
5167 mono_threads_end_abort_protected_block (void)
5169 MonoInternalThread *thread;
5171 thread = mono_thread_internal_current ();
5173 mono_memory_barrier ();
5174 --thread->abort_protected_block_count;
5178 mono_thread_try_resume_interruption (void)
5180 MonoInternalThread *thread;
5182 thread = mono_thread_internal_current ();
5183 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5186 return mono_thread_resume_interruption ();
5190 /* Returns TRUE if the current thread is ready to be interrupted. */
5192 mono_threads_is_ready_to_be_interrupted (void)
5194 MonoInternalThread *thread;
5196 thread = mono_thread_internal_current ();
5197 LOCK_THREAD (thread);
5198 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5199 UNLOCK_THREAD (thread);
5203 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5204 UNLOCK_THREAD (thread);
5208 UNLOCK_THREAD (thread);
5214 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5216 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5218 if (internal->thread_info) {
5219 g_string_append (text, ", state : ");
5220 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5223 if (internal->owned_mutexes) {
5226 g_string_append (text, ", owns : [");
5227 for (i = 0; i < internal->owned_mutexes->len; i++)
5228 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5229 g_string_append (text, "]");
5234 mono_thread_internal_is_current (MonoInternalThread *internal)
5236 g_assert (internal);
5237 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));