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;
161 /* Protected by the threads lock */
162 static GHashTable *joinable_threads;
163 static int joinable_thread_count;
165 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
166 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
168 /* function called at thread start */
169 static MonoThreadStartCB mono_thread_start_cb = NULL;
171 /* function called at thread attach */
172 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
174 /* function called at thread cleanup */
175 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
177 /* The default stack size for each thread */
178 static guint32 default_stacksize = 0;
179 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
181 static void context_adjust_static_data (MonoAppContext *ctx);
182 static void mono_free_static_data (gpointer* static_data);
183 static void mono_init_static_data_info (StaticDataInfo *static_data);
184 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
185 static gboolean mono_thread_resume (MonoInternalThread* thread);
186 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
187 static void self_abort_internal (MonoError *error);
188 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
189 static void self_suspend_internal (void);
191 static MonoException* mono_thread_execute_interruption (void);
192 static void ref_stack_destroy (gpointer rs);
194 /* Spin lock for InterlockedXXX 64 bit functions */
195 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
196 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
197 static mono_mutex_t interlocked_mutex;
199 /* global count of thread interruptions requested */
200 static gint32 thread_interruption_requested = 0;
202 /* Event signaled when a thread changes its background mode */
203 static MonoOSEvent background_change_event;
205 static gboolean shutting_down = FALSE;
207 static gint32 managed_thread_id_counter = 0;
209 /* Class lazy loading functions */
210 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
213 mono_threads_lock (void)
215 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
219 mono_threads_unlock (void)
221 mono_locks_coop_release (&threads_mutex, ThreadsLock);
226 get_next_managed_thread_id (void)
228 return InterlockedIncrement (&managed_thread_id_counter);
231 static inline MonoNativeThreadId
232 thread_get_tid (MonoInternalThread *thread)
234 /* We store the tid as a guint64 to keep the object layout constant between platforms */
235 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
238 static void ensure_synch_cs_set (MonoInternalThread *thread)
240 MonoCoopMutex *synch_cs;
242 if (thread->synch_cs != NULL) {
246 synch_cs = g_new0 (MonoCoopMutex, 1);
247 mono_coop_mutex_init_recursive (synch_cs);
249 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
250 synch_cs, NULL) != NULL) {
251 /* Another thread must have installed this CS */
252 mono_coop_mutex_destroy (synch_cs);
258 lock_thread (MonoInternalThread *thread)
260 if (!thread->synch_cs)
261 ensure_synch_cs_set (thread);
263 g_assert (thread->synch_cs);
265 mono_coop_mutex_lock (thread->synch_cs);
269 unlock_thread (MonoInternalThread *thread)
271 mono_coop_mutex_unlock (thread->synch_cs);
274 static inline gboolean
275 is_appdomainunloaded_exception (MonoClass *klass)
277 return klass == mono_class_get_appdomain_unloaded_exception_class ();
280 static inline gboolean
281 is_threadabort_exception (MonoClass *klass)
283 return klass == mono_defaults.threadabortexception_class;
287 * A special static data offset (guint32) consists of 3 parts:
289 * [0] 6-bit index into the array of chunks.
290 * [6] 25-bit offset into the array.
291 * [31] Bit indicating thread or context static.
296 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
307 } SpecialStaticOffset;
309 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
310 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
312 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
313 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
314 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
315 (((SpecialStaticOffset *) &(x))->fields.f)
318 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
320 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
322 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
323 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
325 return ((char *) thread->static_data [idx]) + off;
329 get_context_static_data (MonoAppContext *ctx, guint32 offset)
331 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
333 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
334 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
336 return ((char *) ctx->static_data [idx]) + off;
340 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
342 static MonoClassField *current_thread_field = NULL;
346 if (!current_thread_field) {
347 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
348 g_assert (current_thread_field);
351 mono_class_vtable (domain, mono_defaults.thread_class);
352 mono_domain_lock (domain);
353 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
354 mono_domain_unlock (domain);
357 return (MonoThread **)get_thread_static_data (thread, offset);
361 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
363 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
365 g_assert (current->obj.vtable->domain == domain);
367 g_assert (!*current_thread_ptr);
368 *current_thread_ptr = current;
372 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
378 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
381 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
382 /* only possible failure mode is OOM, from which we don't expect to recover. */
383 mono_error_assert_ok (&error);
385 MONO_OBJECT_SETREF (thread, internal_thread, internal);
390 static MonoInternalThread*
391 create_internal_thread_object (void)
394 MonoInternalThread *thread;
397 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
398 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
399 /* only possible failure mode is OOM, from which we don't exect to recover */
400 mono_error_assert_ok (&error);
402 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
403 mono_coop_mutex_init_recursive (thread->synch_cs);
405 thread->apartment_state = ThreadApartmentState_Unknown;
406 thread->managed_id = get_next_managed_thread_id ();
407 if (mono_gc_is_moving ()) {
408 thread->thread_pinning_ref = thread;
409 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
412 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
414 thread->suspended = g_new0 (MonoOSEvent, 1);
415 mono_os_event_init (thread->suspended, TRUE);
421 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
425 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
426 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
427 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
432 g_assert (internal->native_handle);
434 res = SetThreadPriority (internal->native_handle, priority - 2);
436 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
437 #else /* HOST_WIN32 */
440 struct sched_param param;
443 tid = thread_get_tid (internal);
445 res = pthread_getschedparam (tid, &policy, ¶m);
447 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
449 #ifdef _POSIX_PRIORITY_SCHEDULING
452 /* Necessary to get valid priority range */
454 min = sched_get_priority_min (policy);
455 max = sched_get_priority_max (policy);
457 if (max > 0 && min >= 0 && max > min) {
458 double srange, drange, sposition, dposition;
459 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
461 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
462 dposition = (sposition / srange) * drange;
463 param.sched_priority = (int)(dposition + min);
470 param.sched_priority = 50;
476 param.sched_priority = 0;
479 g_warning ("%s: unknown policy %d", __func__, policy);
484 res = pthread_setschedparam (tid, policy, ¶m);
487 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
490 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
492 #endif /* HOST_WIN32 */
496 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
499 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain, gsize *stack_ptr)
501 MonoThreadInfo *info;
502 MonoInternalThread *internal;
503 MonoDomain *domain, *root_domain;
507 info = mono_thread_info_current ();
509 internal = thread->internal_thread;
510 internal->handle = mono_threads_open_thread_handle (info->handle);
512 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
514 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
515 internal->thread_info = info;
516 internal->small_id = info->small_id;
517 internal->stack_ptr = stack_ptr;
519 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
521 SET_CURRENT_OBJECT (internal);
523 domain = mono_object_domain (thread);
525 mono_thread_push_appdomain_ref (domain);
526 if (!mono_domain_set (domain, force_domain)) {
527 mono_thread_pop_appdomain_ref ();
531 mono_threads_lock ();
533 if (threads_starting_up)
534 mono_g_hash_table_remove (threads_starting_up, thread);
536 if (shutting_down && !force_attach) {
537 mono_threads_unlock ();
542 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
543 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
546 /* We don't need to duplicate thread->handle, because it is
547 * only closed when the thread object is finalized by the GC. */
548 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
550 /* We have to do this here because mono_thread_start_cb
551 * requires that root_domain_thread is set up. */
552 if (thread_static_info.offset || thread_static_info.idx > 0) {
553 /* get the current allocated size */
554 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
555 mono_alloc_static_data (&internal->static_data, offset, TRUE);
558 mono_threads_unlock ();
560 root_domain = mono_get_root_domain ();
562 g_assert (!internal->root_domain_thread);
563 if (domain != root_domain)
564 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
566 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
568 if (domain != root_domain)
569 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
571 set_current_thread_for_domain (domain, internal, thread);
573 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
581 MonoObject *start_delegate;
582 MonoObject *start_delegate_arg;
583 MonoThreadStart start_func;
584 gpointer start_func_arg;
586 MonoCoopSem registered;
589 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
592 MonoThreadStart start_func;
593 void *start_func_arg;
596 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
600 MonoInternalThread *internal;
601 MonoObject *start_delegate;
602 MonoObject *start_delegate_arg;
605 thread = start_info->thread;
606 internal = thread->internal_thread;
607 domain = mono_object_domain (start_info->thread);
609 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
611 if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
612 start_info->failed = TRUE;
614 mono_coop_sem_post (&start_info->registered);
616 if (InterlockedDecrement (&start_info->ref) == 0) {
617 mono_coop_sem_destroy (&start_info->registered);
624 mono_thread_internal_set_priority (internal, internal->priority);
628 start_delegate = start_info->start_delegate;
629 start_delegate_arg = start_info->start_delegate_arg;
630 start_func = start_info->start_func;
631 start_func_arg = start_info->start_func_arg;
633 /* This MUST be called before any managed code can be
634 * executed, as it calls the callback function that (for the
635 * jit) sets the lmf marker.
638 if (mono_thread_start_cb)
639 mono_thread_start_cb (tid, stack_ptr, start_func);
641 /* On 2.0 profile (and higher), set explicitly since state might have been
643 if (internal->apartment_state == ThreadApartmentState_Unknown)
644 internal->apartment_state = ThreadApartmentState_MTA;
646 mono_thread_init_apartment_state ();
648 /* Let the thread that called Start() know we're ready */
649 mono_coop_sem_post (&start_info->registered);
651 if (InterlockedDecrement (&start_info->ref) == 0) {
652 mono_coop_sem_destroy (&start_info->registered);
656 /* start_info is not valid anymore */
660 * Call this after calling start_notify, since the profiler callback might want
661 * to lock the thread, and the lock is held by thread_start () which waits for
664 mono_profiler_thread_start (tid);
666 /* if the name was set before starting, we didn't invoke the profiler callback */
667 if (internal->name) {
668 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
669 mono_profiler_thread_name (internal->tid, tname);
670 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
674 /* start_func is set only for unmanaged start functions */
676 start_func (start_func_arg);
680 g_assert (start_delegate != NULL);
682 /* we may want to handle the exception here. See comment below on unhandled exceptions */
683 args [0] = (gpointer) start_delegate_arg;
684 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
686 if (!mono_error_ok (&error)) {
687 MonoException *ex = mono_error_convert_to_exception (&error);
689 g_assert (ex != NULL);
690 MonoClass *klass = mono_object_get_class (&ex->object);
691 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
692 !is_threadabort_exception (klass)) {
693 mono_unhandled_exception (&ex->object);
694 mono_invoke_unhandled_exception_hook (&ex->object);
695 g_assert_not_reached ();
698 mono_error_cleanup (&error);
702 /* If the thread calls ExitThread at all, this remaining code
703 * will not be executed, but the main thread will eventually
704 * call mono_thread_detach_internal() on this thread's behalf.
707 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
709 /* Do any cleanup needed for apartment state. This
710 * cannot be done in mono_thread_detach_internal since
711 * mono_thread_detach_internal could be called for a
712 * thread other than the current thread.
713 * mono_thread_cleanup_apartment_state cleans up apartment
714 * for the current thead */
715 mono_thread_cleanup_apartment_state ();
717 mono_thread_detach_internal (internal);
724 static gsize WINAPI start_wrapper(void *data)
726 volatile gsize dummy;
728 return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
734 * Common thread creation code.
735 * LOCKING: Acquires the threads lock.
738 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
739 gboolean threadpool_thread, guint32 stack_size, MonoError *error)
741 StartInfo *start_info = NULL;
742 MonoThreadHandle *thread_handle;
743 MonoNativeThreadId tid;
745 gsize stack_set_size;
748 g_assert (!start_func && !start_func_arg);
750 g_assert (!start_delegate);
753 * Join joinable threads to prevent running out of threads since the finalizer
754 * thread might be blocked/backlogged.
756 mono_threads_join_threads ();
758 mono_error_init (error);
760 mono_threads_lock ();
762 mono_threads_unlock ();
765 if (threads_starting_up == NULL) {
766 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
767 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
769 mono_g_hash_table_insert (threads_starting_up, thread, thread);
770 mono_threads_unlock ();
772 internal->threadpool_thread = threadpool_thread;
773 if (threadpool_thread)
774 mono_thread_set_state (internal, ThreadState_Background);
776 start_info = g_new0 (StartInfo, 1);
778 start_info->thread = thread;
779 start_info->start_delegate = start_delegate;
780 start_info->start_delegate_arg = thread->start_obj;
781 start_info->start_func = start_func;
782 start_info->start_func_arg = start_func_arg;
783 start_info->failed = FALSE;
784 mono_coop_sem_init (&start_info->registered, 0);
787 stack_set_size = default_stacksize_for_thread (internal);
791 thread_handle = mono_threads_create_thread (start_wrapper, start_info, &stack_set_size, &tid);
793 if (thread_handle == NULL) {
794 /* The thread couldn't be created, so set an exception */
795 mono_threads_lock ();
796 mono_g_hash_table_remove (threads_starting_up, thread);
797 mono_threads_unlock ();
798 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
799 /* ref is not going to be decremented in start_wrapper_internal */
800 InterlockedDecrement (&start_info->ref);
805 internal->stack_size = (int) stack_set_size;
807 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
810 * Wait for the thread to set up its TLS data etc, so
811 * theres no potential race condition if someone tries
812 * to look up the data believing the thread has
816 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
818 mono_threads_close_thread_handle (thread_handle);
820 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));
822 ret = !start_info->failed;
825 if (InterlockedDecrement (&start_info->ref) == 0) {
826 mono_coop_sem_destroy (&start_info->registered);
833 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
835 if (mono_thread_start_cb) {
836 mono_thread_start_cb (tid, stack_start, func);
840 void mono_threads_set_default_stacksize (guint32 stacksize)
842 default_stacksize = stacksize;
845 guint32 mono_threads_get_default_stacksize (void)
847 return default_stacksize;
851 * mono_thread_create_internal:
853 * ARG should not be a GC reference.
856 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
859 MonoInternalThread *internal;
862 mono_error_init (error);
864 internal = create_internal_thread_object ();
866 thread = create_thread_object (domain, internal);
868 LOCK_THREAD (internal);
870 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
871 return_val_if_nok (error, NULL);
873 UNLOCK_THREAD (internal);
879 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
882 if (!mono_thread_create_checked (domain, func, arg, &error))
883 mono_error_cleanup (&error);
887 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
889 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
893 mono_thread_attach (MonoDomain *domain)
895 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
901 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
903 MonoInternalThread *internal;
905 MonoNativeThreadId tid;
908 if (mono_thread_internal_current_is_attached ()) {
909 if (domain != mono_domain_get ())
910 mono_domain_set (domain, TRUE);
911 /* Already attached */
912 return mono_thread_current ();
915 if (!mono_gc_register_thread (&domain)) {
916 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 ());
919 tid=mono_native_thread_id_get ();
921 internal = create_internal_thread_object ();
923 thread = create_thread_object (domain, internal);
925 if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
926 /* Mono is shutting down, so just wait for the end */
928 mono_thread_info_sleep (10000, NULL);
931 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
933 if (mono_thread_attach_cb) {
937 mono_thread_info_get_stack_bounds (&staddr, &stsize);
940 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
942 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
945 /* Can happen when we attach the profiler helper thread in order to heapshot. */
946 if (!mono_thread_info_current ()->tools_thread)
947 // FIXME: Need a separate callback
948 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
954 mono_thread_detach_internal (MonoInternalThread *thread)
958 g_assert (thread != NULL);
960 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
963 mono_w32mutex_abandon ();
966 if (thread->abort_state_handle) {
967 mono_gchandle_free (thread->abort_state_handle);
968 thread->abort_state_handle = 0;
971 thread->abort_exc = NULL;
972 thread->current_appcontext = NULL;
975 * This is necessary because otherwise we might have
976 * cross-domain references which will not get cleaned up when
977 * the target domain is unloaded.
979 if (thread->cached_culture_info) {
981 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
982 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
986 * thread->synch_cs can be NULL if this was called after
987 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
988 * This can happen only during shutdown.
989 * The shutting_down flag is not always set, so we can't assert on it.
991 if (thread->synch_cs)
992 LOCK_THREAD (thread);
994 thread->state |= ThreadState_Stopped;
995 thread->state &= ~ThreadState_Background;
997 if (thread->synch_cs)
998 UNLOCK_THREAD (thread);
1001 An interruption request has leaked to cleanup. Adjust the global counter.
1003 This can happen is the abort source thread finds the abortee (this) thread
1004 in unmanaged code. If this thread never trips back to managed code or check
1005 the local flag it will be left set and positively unbalance the global counter.
1007 Leaving the counter unbalanced will cause a performance degradation since all threads
1008 will now keep checking their local flags all the time.
1010 if (InterlockedExchange (&thread->interruption_requested, 0) != 0)
1011 InterlockedDecrement (&thread_interruption_requested);
1013 mono_threads_lock ();
1017 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1018 /* We have to check whether the thread object for the
1019 * tid is still the same in the table because the
1020 * thread might have been destroyed and the tid reused
1021 * in the meantime, in which case the tid would be in
1022 * the table, but with another thread object.
1026 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1030 mono_threads_unlock ();
1032 /* Don't close the handle here, wait for the object finalizer
1033 * to do it. Otherwise, the following race condition applies:
1035 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1037 * 2) Some other handle is reassigned the same slot
1039 * 3) Another thread tries to join the first thread, and
1040 * blocks waiting for the reassigned handle to be signalled
1041 * (which might never happen). This is possible, because the
1042 * thread calling Join() still has a reference to the first
1046 /* if the thread is not in the hash it has been removed already */
1048 mono_domain_unset ();
1049 mono_memory_barrier ();
1051 if (mono_thread_cleanup_fn)
1052 mono_thread_cleanup_fn (thread_get_tid (thread));
1057 mono_release_type_locks (thread);
1059 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1060 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1061 mono_profiler_thread_end (thread->tid);
1063 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1066 * This will signal async signal handlers that the thread has exited.
1067 * The profiler callback needs this to be set, so it cannot be done earlier.
1069 mono_domain_unset ();
1070 mono_memory_barrier ();
1072 if (thread == mono_thread_internal_current ())
1073 mono_thread_pop_appdomain_ref ();
1075 thread->cached_culture_info = NULL;
1077 mono_free_static_data (thread->static_data);
1078 thread->static_data = NULL;
1079 ref_stack_destroy (thread->appdomain_refs);
1080 thread->appdomain_refs = NULL;
1082 g_assert (thread->suspended);
1083 mono_os_event_destroy (thread->suspended);
1084 g_free (thread->suspended);
1085 thread->suspended = NULL;
1087 if (mono_thread_cleanup_fn)
1088 mono_thread_cleanup_fn (thread_get_tid (thread));
1090 mono_memory_barrier ();
1092 if (mono_gc_is_moving ()) {
1093 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1094 thread->thread_pinning_ref = NULL;
1098 SET_CURRENT_OBJECT (NULL);
1099 mono_domain_unset ();
1101 /* Don't need to close the handle to this thread, even though we took a
1102 * reference in mono_thread_attach (), because the GC will do it
1103 * when the Thread object is finalised.
1108 mono_thread_detach (MonoThread *thread)
1111 mono_thread_detach_internal (thread->internal_thread);
1115 * mono_thread_detach_if_exiting:
1117 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1118 * This should be used at the end of embedding code which calls into managed code, and which
1119 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1122 mono_thread_detach_if_exiting (void)
1124 if (mono_thread_info_is_exiting ()) {
1125 MonoInternalThread *thread;
1127 thread = mono_thread_internal_current ();
1129 mono_thread_detach_internal (thread);
1130 mono_thread_info_detach ();
1138 mono_thread_internal_current_is_attached (void)
1140 MonoInternalThread *internal;
1142 internal = GET_CURRENT_OBJECT ();
1150 mono_thread_exit (void)
1152 MonoInternalThread *thread = mono_thread_internal_current ();
1154 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1156 mono_thread_detach_internal (thread);
1158 /* we could add a callback here for embedders to use. */
1159 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1160 exit (mono_environment_exitcode_get ());
1162 mono_thread_info_exit (0);
1166 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1168 MonoInternalThread *internal;
1170 internal = create_internal_thread_object ();
1172 internal->state = ThreadState_Unstarted;
1174 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1178 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1180 return mono_thread_current ();
1184 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1188 MonoInternalThread *internal;
1191 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1193 if (!this_obj->internal_thread)
1194 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1195 internal = this_obj->internal_thread;
1197 LOCK_THREAD (internal);
1199 if ((internal->state & ThreadState_Unstarted) == 0) {
1200 UNLOCK_THREAD (internal);
1201 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1205 if ((internal->state & ThreadState_Aborted) != 0) {
1206 UNLOCK_THREAD (internal);
1210 res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1212 mono_error_cleanup (&error);
1213 UNLOCK_THREAD (internal);
1217 internal->state &= ~ThreadState_Unstarted;
1219 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1221 UNLOCK_THREAD (internal);
1222 return internal->handle;
1226 * This is called from the finalizer of the internal thread object.
1229 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1231 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1234 * Since threads keep a reference to their thread object while running, by
1235 * the time this function is called, the thread has already exited/detached,
1236 * i.e. mono_thread_detach_internal () has ran. The exception is during
1237 * shutdown, when mono_thread_detach_internal () can be called after this.
1239 if (this_obj->handle) {
1240 mono_threads_close_thread_handle (this_obj->handle);
1241 this_obj->handle = NULL;
1245 CloseHandle (this_obj->native_handle);
1248 if (this_obj->synch_cs) {
1249 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1250 this_obj->synch_cs = NULL;
1251 mono_coop_mutex_destroy (synch_cs);
1255 if (this_obj->name) {
1256 void *name = this_obj->name;
1257 this_obj->name = NULL;
1263 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1266 MonoInternalThread *thread = mono_thread_internal_current ();
1268 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1270 if (mono_thread_current_check_pending_interrupt ())
1274 gboolean alerted = FALSE;
1276 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1278 res = mono_thread_info_sleep (ms, &alerted);
1280 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1283 MonoException* exc = mono_thread_execute_interruption ();
1285 mono_raise_exception (exc);
1287 // FIXME: !MONO_INFINITE_WAIT
1288 if (ms != MONO_INFINITE_WAIT)
1297 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1302 ves_icall_System_Threading_Thread_GetDomainID (void)
1304 return mono_domain_get()->domain_id;
1308 ves_icall_System_Threading_Thread_Yield (void)
1310 return mono_thread_info_yield ();
1314 * mono_thread_get_name:
1316 * Return the name of the thread. NAME_LEN is set to the length of the name.
1317 * Return NULL if the thread has no name. The returned memory is owned by the
1321 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1325 LOCK_THREAD (this_obj);
1327 if (!this_obj->name) {
1331 *name_len = this_obj->name_len;
1332 res = g_new (gunichar2, this_obj->name_len);
1333 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1336 UNLOCK_THREAD (this_obj);
1342 * mono_thread_get_name_utf8:
1344 * Return the name of the thread in UTF-8.
1345 * Return NULL if the thread has no name.
1346 * The returned memory is owned by the caller.
1349 mono_thread_get_name_utf8 (MonoThread *thread)
1354 MonoInternalThread *internal = thread->internal_thread;
1355 if (internal == NULL)
1358 LOCK_THREAD (internal);
1360 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1362 UNLOCK_THREAD (internal);
1368 * mono_thread_get_managed_id:
1370 * Return the Thread.ManagedThreadId value of `thread`.
1371 * Returns -1 if `thread` is NULL.
1374 mono_thread_get_managed_id (MonoThread *thread)
1379 MonoInternalThread *internal = thread->internal_thread;
1380 if (internal == NULL)
1383 int32_t id = internal->managed_id;
1389 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1394 mono_error_init (&error);
1396 LOCK_THREAD (this_obj);
1398 if (!this_obj->name)
1401 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1403 UNLOCK_THREAD (this_obj);
1405 if (mono_error_set_pending_exception (&error))
1412 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1414 LOCK_THREAD (this_obj);
1416 mono_error_init (error);
1418 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1419 UNLOCK_THREAD (this_obj);
1421 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1424 if (this_obj->name) {
1425 g_free (this_obj->name);
1426 this_obj->name_len = 0;
1429 this_obj->name = g_new (gunichar2, mono_string_length (name));
1430 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1431 this_obj->name_len = mono_string_length (name);
1434 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1437 this_obj->name = NULL;
1440 UNLOCK_THREAD (this_obj);
1442 if (this_obj->name && this_obj->tid) {
1443 char *tname = mono_string_to_utf8_checked (name, error);
1444 return_if_nok (error);
1445 mono_profiler_thread_name (this_obj->tid, tname);
1446 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1452 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1455 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1456 mono_error_set_pending_exception (&error);
1460 * ves_icall_System_Threading_Thread_GetPriority_internal:
1461 * @param this_obj: The MonoInternalThread on which to operate.
1463 * Gets the priority of the given thread.
1464 * @return: The priority of the given thread.
1467 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1470 MonoInternalThread *internal = this_obj->internal_thread;
1472 LOCK_THREAD (internal);
1473 priority = internal->priority;
1474 UNLOCK_THREAD (internal);
1480 * ves_icall_System_Threading_Thread_SetPriority_internal:
1481 * @param this_obj: The MonoInternalThread on which to operate.
1482 * @param priority: The priority to set.
1484 * Sets the priority of the given thread.
1487 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1489 MonoInternalThread *internal = this_obj->internal_thread;
1491 LOCK_THREAD (internal);
1492 internal->priority = priority;
1493 if (internal->thread_info != NULL)
1494 mono_thread_internal_set_priority (internal, priority);
1495 UNLOCK_THREAD (internal);
1498 /* If the array is already in the requested domain, we just return it,
1499 otherwise we return a copy in that domain. */
1501 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1505 mono_error_init (error);
1509 if (mono_object_domain (arr) == domain)
1512 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1513 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1518 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1521 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1522 mono_error_set_pending_exception (&error);
1527 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1530 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1531 mono_error_set_pending_exception (&error);
1536 mono_thread_current (void)
1538 MonoDomain *domain = mono_domain_get ();
1539 MonoInternalThread *internal = mono_thread_internal_current ();
1540 MonoThread **current_thread_ptr;
1542 g_assert (internal);
1543 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1545 if (!*current_thread_ptr) {
1546 g_assert (domain != mono_get_root_domain ());
1547 *current_thread_ptr = create_thread_object (domain, internal);
1549 return *current_thread_ptr;
1552 /* Return the thread object belonging to INTERNAL in the current domain */
1554 mono_thread_current_for_thread (MonoInternalThread *internal)
1556 MonoDomain *domain = mono_domain_get ();
1557 MonoThread **current_thread_ptr;
1559 g_assert (internal);
1560 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1562 if (!*current_thread_ptr) {
1563 g_assert (domain != mono_get_root_domain ());
1564 *current_thread_ptr = create_thread_object (domain, internal);
1566 return *current_thread_ptr;
1570 mono_thread_internal_current (void)
1572 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1573 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1577 static MonoThreadInfoWaitRet
1578 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1581 MonoThreadInfoWaitRet ret;
1586 mono_error_init (error);
1588 start = (ms == -1) ? 0 : mono_msec_ticks ();
1591 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1594 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1597 exc = mono_thread_execute_interruption ();
1599 mono_error_set_exception_instance (error, exc);
1606 /* Re-calculate ms according to the time passed */
1607 diff_ms = (gint32)(mono_msec_ticks () - start);
1608 if (diff_ms >= ms) {
1609 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1612 wait = ms - diff_ms;
1619 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1621 MonoInternalThread *thread = this_obj->internal_thread;
1622 MonoThreadHandle *handle = thread->handle;
1623 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1627 if (mono_thread_current_check_pending_interrupt ())
1630 LOCK_THREAD (thread);
1632 if ((thread->state & ThreadState_Unstarted) != 0) {
1633 UNLOCK_THREAD (thread);
1635 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1639 UNLOCK_THREAD (thread);
1642 ms=MONO_INFINITE_WAIT;
1644 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1646 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1648 ret=mono_join_uninterrupted (handle, ms, &error);
1650 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1652 mono_error_set_pending_exception (&error);
1654 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1655 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1660 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1665 #define MANAGED_WAIT_FAILED 0x7fffffff
1668 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1670 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1671 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1672 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1673 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1674 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1675 return WAIT_IO_COMPLETION;
1676 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1677 return WAIT_TIMEOUT;
1678 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1679 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1680 return MANAGED_WAIT_FAILED;
1682 g_error ("%s: unknown val value %d", __func__, val);
1686 static MonoW32HandleWaitRet
1687 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1690 MonoW32HandleWaitRet ret;
1695 mono_error_init (error);
1697 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1701 if (numhandles != 1)
1702 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1704 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1706 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1707 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1708 #endif /* HOST_WIN32 */
1711 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1714 exc = mono_thread_execute_interruption ();
1716 mono_error_set_exception_instance (error, exc);
1723 /* Re-calculate ms according to the time passed */
1724 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1725 if (diff_ms >= ms) {
1726 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1729 wait = ms - diff_ms;
1735 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1740 MonoW32HandleWaitRet ret;
1742 MonoObject *waitHandle;
1743 MonoInternalThread *thread = mono_thread_internal_current ();
1745 /* Do this WaitSleepJoin check before creating objects */
1746 if (mono_thread_current_check_pending_interrupt ())
1747 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1749 /* We fail in managed if the array has more than 64 elements */
1750 numhandles = (guint32)mono_array_length(mono_handles);
1751 handles = g_new0(HANDLE, numhandles);
1753 for(i = 0; i < numhandles; i++) {
1754 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1755 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1759 ms=MONO_INFINITE_WAIT;
1762 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1764 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1766 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1770 mono_error_set_pending_exception (&error);
1772 return map_native_wait_result_to_managed (ret, numhandles);
1775 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1778 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1779 uintptr_t numhandles;
1780 MonoW32HandleWaitRet ret;
1782 MonoObject *waitHandle;
1783 MonoInternalThread *thread = mono_thread_internal_current ();
1785 /* Do this WaitSleepJoin check before creating objects */
1786 if (mono_thread_current_check_pending_interrupt ())
1787 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1789 numhandles = mono_array_length(mono_handles);
1790 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1791 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1793 for(i = 0; i < numhandles; i++) {
1794 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1795 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1799 ms=MONO_INFINITE_WAIT;
1802 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1804 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1806 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1808 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1810 mono_error_set_pending_exception (&error);
1812 return map_native_wait_result_to_managed (ret, numhandles);
1815 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1818 MonoW32HandleWaitRet ret;
1819 MonoInternalThread *thread = mono_thread_internal_current ();
1821 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1824 ms=MONO_INFINITE_WAIT;
1827 if (mono_thread_current_check_pending_interrupt ())
1828 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1830 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1832 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1834 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1836 mono_error_set_pending_exception (&error);
1837 return map_native_wait_result_to_managed (ret, 1);
1841 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1843 MonoW32HandleWaitRet ret;
1844 MonoInternalThread *thread = mono_thread_internal_current ();
1847 ms = MONO_INFINITE_WAIT;
1849 if (mono_thread_current_check_pending_interrupt ())
1850 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1852 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1856 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1858 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1862 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1864 return map_native_wait_result_to_managed (ret, 1);
1867 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1869 return InterlockedIncrement (location);
1872 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1874 #if SIZEOF_VOID_P == 4
1875 if (G_UNLIKELY ((size_t)location & 0x7)) {
1877 mono_interlocked_lock ();
1880 mono_interlocked_unlock ();
1884 return InterlockedIncrement64 (location);
1887 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1889 return InterlockedDecrement(location);
1892 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1894 #if SIZEOF_VOID_P == 4
1895 if (G_UNLIKELY ((size_t)location & 0x7)) {
1897 mono_interlocked_lock ();
1900 mono_interlocked_unlock ();
1904 return InterlockedDecrement64 (location);
1907 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1909 return InterlockedExchange(location, value);
1912 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1915 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1916 mono_gc_wbarrier_generic_nostore (location);
1920 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1922 return InterlockedExchangePointer(location, value);
1925 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1927 IntFloatUnion val, ret;
1930 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1936 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1938 #if SIZEOF_VOID_P == 4
1939 if (G_UNLIKELY ((size_t)location & 0x7)) {
1941 mono_interlocked_lock ();
1944 mono_interlocked_unlock ();
1948 return InterlockedExchange64 (location, value);
1952 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1954 LongDoubleUnion val, ret;
1957 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1962 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1964 return InterlockedCompareExchange(location, value, comparand);
1967 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1969 gint32 r = InterlockedCompareExchange(location, value, comparand);
1970 *success = r == comparand;
1974 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1977 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1978 mono_gc_wbarrier_generic_nostore (location);
1982 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1984 return InterlockedCompareExchangePointer(location, value, comparand);
1987 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1989 IntFloatUnion val, ret, cmp;
1992 cmp.fval = comparand;
1993 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1999 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2001 #if SIZEOF_VOID_P == 8
2002 LongDoubleUnion val, comp, ret;
2005 comp.fval = comparand;
2006 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2012 mono_interlocked_lock ();
2014 if (old == comparand)
2016 mono_interlocked_unlock ();
2023 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2025 #if SIZEOF_VOID_P == 4
2026 if (G_UNLIKELY ((size_t)location & 0x7)) {
2028 mono_interlocked_lock ();
2030 if (old == comparand)
2032 mono_interlocked_unlock ();
2036 return InterlockedCompareExchange64 (location, value, comparand);
2040 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2043 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2044 mono_gc_wbarrier_generic_nostore (location);
2049 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2052 MONO_CHECK_NULL (location, NULL);
2053 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2054 mono_gc_wbarrier_generic_nostore (location);
2059 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2061 return InterlockedAdd (location, value);
2065 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2067 #if SIZEOF_VOID_P == 4
2068 if (G_UNLIKELY ((size_t)location & 0x7)) {
2070 mono_interlocked_lock ();
2073 mono_interlocked_unlock ();
2077 return InterlockedAdd64 (location, value);
2081 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2083 #if SIZEOF_VOID_P == 4
2084 if (G_UNLIKELY ((size_t)location & 0x7)) {
2086 mono_interlocked_lock ();
2088 mono_interlocked_unlock ();
2092 return InterlockedRead64 (location);
2096 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2098 mono_memory_barrier ();
2102 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2104 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2106 if (state & ThreadState_Background) {
2107 /* If the thread changes the background mode, the main thread has to
2108 * be notified, since it has to rebuild the list of threads to
2111 mono_os_event_set (&background_change_event);
2116 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2118 mono_thread_set_state (this_obj, (MonoThreadState)state);
2120 if (state & ThreadState_Background) {
2121 /* If the thread changes the background mode, the main thread has to
2122 * be notified, since it has to rebuild the list of threads to
2125 mono_os_event_set (&background_change_event);
2130 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2134 LOCK_THREAD (this_obj);
2136 state = this_obj->state;
2138 UNLOCK_THREAD (this_obj);
2143 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2145 MonoInternalThread *current;
2147 MonoInternalThread *thread = this_obj->internal_thread;
2149 LOCK_THREAD (thread);
2151 current = mono_thread_internal_current ();
2153 thread->thread_interrupt_requested = TRUE;
2154 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2156 UNLOCK_THREAD (thread);
2159 async_abort_internal (thread, FALSE);
2164 * mono_thread_current_check_pending_interrupt:
2166 * Checks if there's a interruption request and set the pending exception if so.
2168 * @returns true if a pending exception was set
2171 mono_thread_current_check_pending_interrupt (void)
2173 MonoInternalThread *thread = mono_thread_internal_current ();
2174 gboolean throw_ = FALSE;
2176 LOCK_THREAD (thread);
2178 if (thread->thread_interrupt_requested) {
2180 thread->thread_interrupt_requested = FALSE;
2183 UNLOCK_THREAD (thread);
2186 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2191 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2193 LOCK_THREAD (thread);
2195 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2196 (thread->state & ThreadState_StopRequested) != 0 ||
2197 (thread->state & ThreadState_Stopped) != 0)
2199 UNLOCK_THREAD (thread);
2203 if ((thread->state & ThreadState_Unstarted) != 0) {
2204 thread->state |= ThreadState_Aborted;
2205 UNLOCK_THREAD (thread);
2209 thread->state |= ThreadState_AbortRequested;
2210 if (thread->abort_state_handle)
2211 mono_gchandle_free (thread->abort_state_handle);
2213 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2214 g_assert (thread->abort_state_handle);
2216 thread->abort_state_handle = 0;
2218 thread->abort_exc = NULL;
2220 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));
2222 /* During shutdown, we can't wait for other threads */
2224 /* Make sure the thread is awake */
2225 mono_thread_resume (thread);
2227 UNLOCK_THREAD (thread);
2232 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2234 if (!request_thread_abort (thread, state))
2237 if (thread == mono_thread_internal_current ()) {
2239 self_abort_internal (&error);
2240 mono_error_set_pending_exception (&error);
2242 async_abort_internal (thread, TRUE);
2247 * mono_thread_internal_abort:
2249 * Request thread @thread to be aborted.
2251 * @thread MUST NOT be the current thread.
2254 mono_thread_internal_abort (MonoInternalThread *thread)
2256 g_assert (thread != mono_thread_internal_current ());
2258 if (!request_thread_abort (thread, NULL))
2260 async_abort_internal (thread, TRUE);
2264 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2266 MonoInternalThread *thread = mono_thread_internal_current ();
2267 gboolean was_aborting;
2269 LOCK_THREAD (thread);
2270 was_aborting = thread->state & ThreadState_AbortRequested;
2271 thread->state &= ~ThreadState_AbortRequested;
2272 UNLOCK_THREAD (thread);
2274 if (!was_aborting) {
2275 const char *msg = "Unable to reset abort because no abort was requested";
2276 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2280 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2281 thread->abort_exc = NULL;
2282 if (thread->abort_state_handle) {
2283 mono_gchandle_free (thread->abort_state_handle);
2284 /* This is actually not necessary - the handle
2285 only counts if the exception is set */
2286 thread->abort_state_handle = 0;
2291 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2293 LOCK_THREAD (thread);
2295 thread->state &= ~ThreadState_AbortRequested;
2297 if (thread->abort_exc) {
2298 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2299 thread->abort_exc = NULL;
2300 if (thread->abort_state_handle) {
2301 mono_gchandle_free (thread->abort_state_handle);
2302 /* This is actually not necessary - the handle
2303 only counts if the exception is set */
2304 thread->abort_state_handle = 0;
2308 UNLOCK_THREAD (thread);
2312 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2315 MonoInternalThread *thread = this_obj->internal_thread;
2316 MonoObject *state, *deserialized = NULL;
2319 if (!thread->abort_state_handle)
2322 state = mono_gchandle_get_target (thread->abort_state_handle);
2325 domain = mono_domain_get ();
2326 if (mono_object_domain (state) == domain)
2329 deserialized = mono_object_xdomain_representation (state, domain, &error);
2331 if (!deserialized) {
2332 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2333 if (!is_ok (&error)) {
2334 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2335 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2337 mono_set_pending_exception (invalid_op_exc);
2341 return deserialized;
2345 mono_thread_suspend (MonoInternalThread *thread)
2347 LOCK_THREAD (thread);
2349 if ((thread->state & ThreadState_Unstarted) != 0 ||
2350 (thread->state & ThreadState_Aborted) != 0 ||
2351 (thread->state & ThreadState_Stopped) != 0)
2353 UNLOCK_THREAD (thread);
2357 if ((thread->state & ThreadState_Suspended) != 0 ||
2358 (thread->state & ThreadState_SuspendRequested) != 0 ||
2359 (thread->state & ThreadState_StopRequested) != 0)
2361 UNLOCK_THREAD (thread);
2365 thread->state |= ThreadState_SuspendRequested;
2366 mono_os_event_reset (thread->suspended);
2368 if (thread == mono_thread_internal_current ()) {
2369 /* calls UNLOCK_THREAD (thread) */
2370 self_suspend_internal ();
2372 /* calls UNLOCK_THREAD (thread) */
2373 async_suspend_internal (thread, FALSE);
2380 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2382 if (!mono_thread_suspend (this_obj->internal_thread)) {
2383 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2388 /* LOCKING: LOCK_THREAD(thread) must be held */
2390 mono_thread_resume (MonoInternalThread *thread)
2392 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2393 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2394 thread->state &= ~ThreadState_SuspendRequested;
2395 mono_os_event_set (thread->suspended);
2399 if ((thread->state & ThreadState_Suspended) == 0 ||
2400 (thread->state & ThreadState_Unstarted) != 0 ||
2401 (thread->state & ThreadState_Aborted) != 0 ||
2402 (thread->state & ThreadState_Stopped) != 0)
2404 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2408 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2410 mono_os_event_set (thread->suspended);
2412 if (!thread->self_suspended) {
2413 UNLOCK_THREAD (thread);
2415 /* Awake the thread */
2416 if (!mono_thread_info_resume (thread_get_tid (thread)))
2419 LOCK_THREAD (thread);
2422 thread->state &= ~ThreadState_Suspended;
2428 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2430 if (!thread->internal_thread) {
2431 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2433 LOCK_THREAD (thread->internal_thread);
2434 if (!mono_thread_resume (thread->internal_thread))
2435 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2436 UNLOCK_THREAD (thread->internal_thread);
2441 mono_threads_is_critical_method (MonoMethod *method)
2443 switch (method->wrapper_type) {
2444 case MONO_WRAPPER_RUNTIME_INVOKE:
2445 case MONO_WRAPPER_XDOMAIN_INVOKE:
2446 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2453 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2458 if (mono_threads_is_critical_method (m)) {
2459 *((gboolean*)data) = TRUE;
2466 is_running_protected_wrapper (void)
2468 gboolean found = FALSE;
2469 mono_stack_walk (find_wrapper, &found);
2474 request_thread_stop (MonoInternalThread *thread)
2476 LOCK_THREAD (thread);
2478 if ((thread->state & ThreadState_StopRequested) != 0 ||
2479 (thread->state & ThreadState_Stopped) != 0)
2481 UNLOCK_THREAD (thread);
2485 /* Make sure the thread is awake */
2486 mono_thread_resume (thread);
2488 thread->state |= ThreadState_StopRequested;
2489 thread->state &= ~ThreadState_AbortRequested;
2491 UNLOCK_THREAD (thread);
2496 * mono_thread_internal_stop:
2498 * Request thread @thread to stop.
2500 * @thread MUST NOT be the current thread.
2503 mono_thread_internal_stop (MonoInternalThread *thread)
2505 g_assert (thread != mono_thread_internal_current ());
2507 if (!request_thread_stop (thread))
2510 async_abort_internal (thread, TRUE);
2513 void mono_thread_stop (MonoThread *thread)
2515 MonoInternalThread *internal = thread->internal_thread;
2517 if (!request_thread_stop (internal))
2520 if (internal == mono_thread_internal_current ()) {
2522 self_abort_internal (&error);
2524 This function is part of the embeding API and has no way to return the exception
2525 to be thrown. So what we do is keep the old behavior and raise the exception.
2527 mono_error_raise_exception (&error); /* OK to throw, see note */
2529 async_abort_internal (internal, TRUE);
2534 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2536 gint8 tmp = *(volatile gint8 *)ptr;
2537 mono_memory_barrier ();
2542 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2544 gint16 tmp = *(volatile gint16 *)ptr;
2545 mono_memory_barrier ();
2550 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2552 gint32 tmp = *(volatile gint32 *)ptr;
2553 mono_memory_barrier ();
2558 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2560 gint64 tmp = *(volatile gint64 *)ptr;
2561 mono_memory_barrier ();
2566 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2568 volatile void *tmp = *(volatile void **)ptr;
2569 mono_memory_barrier ();
2570 return (void *) tmp;
2574 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2576 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2577 mono_memory_barrier ();
2578 return (MonoObject *) tmp;
2582 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2584 double tmp = *(volatile double *)ptr;
2585 mono_memory_barrier ();
2590 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2592 float tmp = *(volatile float *)ptr;
2593 mono_memory_barrier ();
2598 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2600 return InterlockedRead8 ((volatile gint8 *)ptr);
2604 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2606 return InterlockedRead16 ((volatile gint16 *)ptr);
2610 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2612 return InterlockedRead ((volatile gint32 *)ptr);
2616 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2618 #if SIZEOF_VOID_P == 4
2619 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2621 mono_interlocked_lock ();
2622 val = *(gint64*)ptr;
2623 mono_interlocked_unlock ();
2627 return InterlockedRead64 ((volatile gint64 *)ptr);
2631 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2633 return InterlockedReadPointer ((volatile gpointer *)ptr);
2637 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2641 #if SIZEOF_VOID_P == 4
2642 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2644 mono_interlocked_lock ();
2645 val = *(double*)ptr;
2646 mono_interlocked_unlock ();
2651 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2657 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2661 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2667 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2669 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2673 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2675 mono_memory_barrier ();
2676 *(volatile gint8 *)ptr = value;
2680 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2682 mono_memory_barrier ();
2683 *(volatile gint16 *)ptr = value;
2687 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2689 mono_memory_barrier ();
2690 *(volatile gint32 *)ptr = value;
2694 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2696 mono_memory_barrier ();
2697 *(volatile gint64 *)ptr = value;
2701 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2703 mono_memory_barrier ();
2704 *(volatile void **)ptr = value;
2708 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2710 mono_memory_barrier ();
2711 mono_gc_wbarrier_generic_store (ptr, value);
2715 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2717 mono_memory_barrier ();
2718 *(volatile double *)ptr = value;
2722 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2724 mono_memory_barrier ();
2725 *(volatile float *)ptr = value;
2729 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2731 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2735 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2737 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2741 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2743 InterlockedWrite ((volatile gint32 *)ptr, value);
2747 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2749 #if SIZEOF_VOID_P == 4
2750 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2751 mono_interlocked_lock ();
2752 *(gint64*)ptr = value;
2753 mono_interlocked_unlock ();
2758 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2762 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2764 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2768 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2772 #if SIZEOF_VOID_P == 4
2773 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2774 mono_interlocked_lock ();
2775 *(double*)ptr = value;
2776 mono_interlocked_unlock ();
2783 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2787 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2793 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2797 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2799 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2803 free_context (void *user_data)
2805 ContextStaticData *data = user_data;
2807 mono_threads_lock ();
2810 * There is no guarantee that, by the point this reference queue callback
2811 * has been invoked, the GC handle associated with the object will fail to
2812 * resolve as one might expect. So if we don't free and remove the GC
2813 * handle here, free_context_static_data_helper () could end up resolving
2814 * a GC handle to an actually-dead context which would contain a pointer
2815 * to an already-freed static data segment, resulting in a crash when
2818 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2820 mono_threads_unlock ();
2822 mono_gchandle_free (data->gc_handle);
2823 mono_free_static_data (data->static_data);
2828 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2830 mono_threads_lock ();
2832 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2835 contexts = g_hash_table_new (NULL, NULL);
2838 context_queue = mono_gc_reference_queue_new (free_context);
2840 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2841 g_hash_table_insert (contexts, gch, gch);
2844 * We use this intermediate structure to contain a duplicate pointer to
2845 * the static data because we can't rely on being able to resolve the GC
2846 * handle in the reference queue callback.
2848 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2849 data->gc_handle = GPOINTER_TO_UINT (gch);
2852 context_adjust_static_data (ctx);
2853 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2855 mono_threads_unlock ();
2857 mono_profiler_context_loaded (ctx);
2861 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2864 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2865 * cleanup in exceptional circumstances, we don't actually do any
2866 * cleanup work here. We instead do this via a reference queue.
2869 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2871 mono_profiler_context_unloaded (ctx);
2874 void mono_thread_init (MonoThreadStartCB start_cb,
2875 MonoThreadAttachCB attach_cb)
2877 mono_coop_mutex_init_recursive (&threads_mutex);
2879 mono_os_mutex_init_recursive(&interlocked_mutex);
2880 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2882 mono_os_event_init (&background_change_event, FALSE);
2884 mono_init_static_data_info (&thread_static_info);
2885 mono_init_static_data_info (&context_static_info);
2887 mono_thread_start_cb = start_cb;
2888 mono_thread_attach_cb = attach_cb;
2891 void mono_thread_cleanup (void)
2893 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
2894 /* The main thread must abandon any held mutexes (particularly
2895 * important for named mutexes as they are shared across
2896 * processes, see bug 74680.) This will happen when the
2897 * thread exits, but if it's not running in a subthread it
2898 * won't exit in time.
2900 mono_w32mutex_abandon ();
2904 /* This stuff needs more testing, it seems one of these
2905 * critical sections can be locked when mono_thread_cleanup is
2908 mono_coop_mutex_destroy (&threads_mutex);
2909 mono_os_mutex_destroy (&interlocked_mutex);
2910 mono_os_mutex_destroy (&delayed_free_table_mutex);
2911 mono_os_mutex_destroy (&small_id_mutex);
2912 mono_os_event_destroy (&background_change_event);
2917 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2919 mono_thread_cleanup_fn = func;
2923 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2925 thread->internal_thread->manage_callback = func;
2929 static void print_tids (gpointer key, gpointer value, gpointer user)
2931 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2932 * sizeof(uint) and a cast to uint would overflow
2934 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2935 * print this as a pointer.
2937 g_message ("Waiting for: %p", key);
2942 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2943 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2948 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
2951 MonoThreadInfoWaitRet ret;
2953 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2955 /* Add the thread state change event, so it wakes
2956 * up if a thread changes to background mode. */
2959 if (check_state_change)
2960 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
2962 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
2965 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
2966 /* See the comment in build_wait_tids() */
2967 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2971 for( i = 0; i < wait->num; i++)
2972 mono_threads_close_thread_handle (wait->handles [i]);
2974 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
2977 if (ret < wait->num) {
2978 MonoInternalThread *internal;
2980 internal = wait->threads [ret];
2982 mono_threads_lock ();
2983 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
2984 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
2985 mono_threads_unlock ();
2989 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2991 struct wait_data *wait=(struct wait_data *)user;
2993 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
2994 MonoInternalThread *thread=(MonoInternalThread *)value;
2996 /* Ignore background threads, we abort them later */
2997 /* Do not lock here since it is not needed and the caller holds threads_lock */
2998 if (thread->state & ThreadState_Background) {
2999 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3000 return; /* just leave, ignore */
3003 if (mono_gc_is_finalizer_internal_thread (thread)) {
3004 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3008 if (thread == mono_thread_internal_current ()) {
3009 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3013 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3014 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3018 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3019 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3023 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3024 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3025 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3026 wait->threads[wait->num]=thread;
3029 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3031 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3036 /* Just ignore the rest, we can't do anything with
3043 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3045 struct wait_data *wait=(struct wait_data *)user;
3046 MonoNativeThreadId self = mono_native_thread_id_get ();
3047 MonoInternalThread *thread = (MonoInternalThread *)value;
3049 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3052 /* The finalizer thread is not a background thread */
3053 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3054 && (thread->state & ThreadState_Background) != 0
3055 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3057 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3058 wait->threads[wait->num] = thread;
3061 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3062 mono_thread_internal_abort (thread);
3066 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3067 && !mono_gc_is_finalizer_internal_thread (thread);
3071 * mono_threads_set_shutting_down:
3073 * Is called by a thread that wants to shut down Mono. If the runtime is already
3074 * shutting down, the calling thread is suspended/stopped, and this function never
3078 mono_threads_set_shutting_down (void)
3080 MonoInternalThread *current_thread = mono_thread_internal_current ();
3082 mono_threads_lock ();
3084 if (shutting_down) {
3085 mono_threads_unlock ();
3087 /* Make sure we're properly suspended/stopped */
3089 LOCK_THREAD (current_thread);
3091 if ((current_thread->state & ThreadState_SuspendRequested) ||
3092 (current_thread->state & ThreadState_AbortRequested) ||
3093 (current_thread->state & ThreadState_StopRequested)) {
3094 UNLOCK_THREAD (current_thread);
3095 mono_thread_execute_interruption ();
3097 current_thread->state |= ThreadState_Stopped;
3098 UNLOCK_THREAD (current_thread);
3101 /*since we're killing the thread, detach it.*/
3102 mono_thread_detach_internal (current_thread);
3104 /* Wake up other threads potentially waiting for us */
3105 mono_thread_info_exit (0);
3107 shutting_down = TRUE;
3109 /* Not really a background state change, but this will
3110 * interrupt the main thread if it is waiting for all
3111 * the other threads.
3113 mono_os_event_set (&background_change_event);
3115 mono_threads_unlock ();
3119 void mono_thread_manage (void)
3121 struct wait_data wait_data;
3122 struct wait_data *wait = &wait_data;
3124 memset (wait, 0, sizeof (struct wait_data));
3125 /* join each thread that's still running */
3126 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3128 mono_threads_lock ();
3130 THREAD_DEBUG (g_message("%s: No threads", __func__));
3131 mono_threads_unlock ();
3134 mono_threads_unlock ();
3137 mono_threads_lock ();
3138 if (shutting_down) {
3139 /* somebody else is shutting down */
3140 mono_threads_unlock ();
3143 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3144 mono_g_hash_table_foreach (threads, print_tids, NULL));
3146 mono_os_event_reset (&background_change_event);
3148 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3149 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3150 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3151 mono_threads_unlock ();
3153 /* Something to wait for */
3154 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3155 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3156 } while(wait->num>0);
3158 /* Mono is shutting down, so just wait for the end */
3159 if (!mono_runtime_try_shutdown ()) {
3160 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3161 mono_thread_suspend (mono_thread_internal_current ());
3162 mono_thread_execute_interruption ();
3166 * Remove everything but the finalizer thread and self.
3167 * Also abort all the background threads
3170 mono_threads_lock ();
3173 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3174 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3175 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3177 mono_threads_unlock ();
3179 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3180 if (wait->num > 0) {
3181 /* Something to wait for */
3182 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3184 } while (wait->num > 0);
3187 * give the subthreads a chance to really quit (this is mainly needed
3188 * to get correct user and system times from getrusage/wait/time(1)).
3189 * This could be removed if we avoid pthread_detach() and use pthread_join().
3191 mono_thread_info_yield ();
3195 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3197 MonoInternalThread *thread = (MonoInternalThread*)value;
3198 struct wait_data *wait = (struct wait_data*)user_data;
3201 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3203 * This needs no locking.
3205 if ((thread->state & ThreadState_Suspended) != 0 ||
3206 (thread->state & ThreadState_Stopped) != 0)
3209 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3210 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3211 wait->threads [wait->num] = thread;
3217 * mono_thread_suspend_all_other_threads:
3219 * Suspend all managed threads except the finalizer thread and this thread. It is
3220 * not possible to resume them later.
3222 void mono_thread_suspend_all_other_threads (void)
3224 struct wait_data wait_data;
3225 struct wait_data *wait = &wait_data;
3227 MonoNativeThreadId self = mono_native_thread_id_get ();
3228 guint32 eventidx = 0;
3229 gboolean starting, finished;
3231 memset (wait, 0, sizeof (struct wait_data));
3233 * The other threads could be in an arbitrary state at this point, i.e.
3234 * they could be starting up, shutting down etc. This means that there could be
3235 * threads which are not even in the threads hash table yet.
3239 * First we set a barrier which will be checked by all threads before they
3240 * are added to the threads hash table, and they will exit if the flag is set.
3241 * This ensures that no threads could be added to the hash later.
3242 * We will use shutting_down as the barrier for now.
3244 g_assert (shutting_down);
3247 * We make multiple calls to WaitForMultipleObjects since:
3248 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3249 * - some threads could exit without becoming suspended
3254 * Make a copy of the hashtable since we can't do anything with
3255 * threads while threads_mutex is held.
3258 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3259 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3260 mono_threads_lock ();
3261 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3262 mono_threads_unlock ();
3265 /* Get the suspended events that we'll be waiting for */
3266 for (i = 0; i < wait->num; ++i) {
3267 MonoInternalThread *thread = wait->threads [i];
3269 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3270 || mono_gc_is_finalizer_internal_thread (thread)
3271 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3273 mono_threads_close_thread_handle (wait->handles [i]);
3274 wait->threads [i] = NULL;
3278 LOCK_THREAD (thread);
3280 if ((thread->state & ThreadState_Suspended) != 0 ||
3281 (thread->state & ThreadState_StopRequested) != 0 ||
3282 (thread->state & ThreadState_Stopped) != 0) {
3283 UNLOCK_THREAD (thread);
3284 mono_threads_close_thread_handle (wait->handles [i]);
3285 wait->threads [i] = NULL;
3291 /* Convert abort requests into suspend requests */
3292 if ((thread->state & ThreadState_AbortRequested) != 0)
3293 thread->state &= ~ThreadState_AbortRequested;
3295 thread->state |= ThreadState_SuspendRequested;
3296 mono_os_event_reset (thread->suspended);
3298 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3299 async_suspend_internal (thread, TRUE);
3301 mono_threads_close_thread_handle (wait->handles [i]);
3302 wait->threads [i] = NULL;
3304 if (eventidx <= 0) {
3306 * If there are threads which are starting up, we wait until they
3307 * are suspended when they try to register in the threads hash.
3308 * This is guaranteed to finish, since the threads which can create new
3309 * threads get suspended after a while.
3310 * FIXME: The finalizer thread can still create new threads.
3312 mono_threads_lock ();
3313 if (threads_starting_up)
3314 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3317 mono_threads_unlock ();
3319 mono_thread_info_sleep (100, NULL);
3327 MonoInternalThread *thread;
3328 MonoStackFrameInfo *frames;
3329 int nframes, max_frames;
3330 int nthreads, max_threads;
3331 MonoInternalThread **threads;
3332 } ThreadDumpUserData;
3334 static gboolean thread_dump_requested;
3336 /* This needs to be async safe */
3338 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3340 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3342 if (ud->nframes < ud->max_frames) {
3343 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3350 /* This needs to be async safe */
3351 static SuspendThreadResult
3352 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3354 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3355 MonoInternalThread *thread = user_data->thread;
3358 /* This no longer works with remote unwinding */
3359 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3360 mono_thread_internal_describe (thread, text);
3361 g_string_append (text, "\n");
3364 if (thread == mono_thread_internal_current ())
3365 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3367 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3369 return MonoResumeThread;
3373 int nthreads, max_threads;
3374 MonoInternalThread **threads;
3375 } CollectThreadsUserData;
3378 collect_thread (gpointer key, gpointer value, gpointer user)
3380 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3381 MonoInternalThread *thread = (MonoInternalThread *)value;
3383 if (ud->nthreads < ud->max_threads)
3384 ud->threads [ud->nthreads ++] = thread;
3388 * Collect running threads into the THREADS array.
3389 * THREADS should be an array allocated on the stack.
3392 collect_threads (MonoInternalThread **thread_array, int max_threads)
3394 CollectThreadsUserData ud;
3396 memset (&ud, 0, sizeof (ud));
3397 /* This array contains refs, but its on the stack, so its ok */
3398 ud.threads = thread_array;
3399 ud.max_threads = max_threads;
3401 mono_threads_lock ();
3402 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3403 mono_threads_unlock ();
3409 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3411 GString* text = g_string_new (0);
3413 GError *error = NULL;
3416 ud->thread = thread;
3419 /* Collect frames for the thread */
3420 if (thread == mono_thread_internal_current ()) {
3421 get_thread_dump (mono_thread_info_current (), ud);
3423 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3427 * Do all the non async-safe work outside of get_thread_dump.
3430 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3432 g_string_append_printf (text, "\n\"%s\"", name);
3435 else if (thread->threadpool_thread) {
3436 g_string_append (text, "\n\"<threadpool thread>\"");
3438 g_string_append (text, "\n\"<unnamed thread>\"");
3441 for (i = 0; i < ud->nframes; ++i) {
3442 MonoStackFrameInfo *frame = &ud->frames [i];
3443 MonoMethod *method = NULL;
3445 if (frame->type == FRAME_TYPE_MANAGED)
3446 method = mono_jit_info_get_method (frame->ji);
3449 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3450 g_string_append_printf (text, " %s\n", location);
3453 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3457 fprintf (stdout, "%s", text->str);
3459 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3460 OutputDebugStringA(text->str);
3463 g_string_free (text, TRUE);
3468 mono_threads_perform_thread_dump (void)
3470 ThreadDumpUserData ud;
3471 MonoInternalThread *thread_array [128];
3472 int tindex, nthreads;
3474 if (!thread_dump_requested)
3477 printf ("Full thread dump:\n");
3479 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3480 nthreads = collect_threads (thread_array, 128);
3482 memset (&ud, 0, sizeof (ud));
3483 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3484 ud.max_frames = 256;
3486 for (tindex = 0; tindex < nthreads; ++tindex)
3487 dump_thread (thread_array [tindex], &ud);
3491 thread_dump_requested = FALSE;
3494 /* Obtain the thread dump of all threads */
3496 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3499 ThreadDumpUserData ud;
3500 MonoInternalThread *thread_array [128];
3501 MonoDomain *domain = mono_domain_get ();
3502 MonoDebugSourceLocation *location;
3503 int tindex, nthreads;
3505 mono_error_init (error);
3507 *out_threads = NULL;
3508 *out_stack_frames = NULL;
3510 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3511 nthreads = collect_threads (thread_array, 128);
3513 memset (&ud, 0, sizeof (ud));
3514 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3515 ud.max_frames = 256;
3517 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3520 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3524 for (tindex = 0; tindex < nthreads; ++tindex) {
3525 MonoInternalThread *thread = thread_array [tindex];
3526 MonoArray *thread_frames;
3532 /* Collect frames for the thread */
3533 if (thread == mono_thread_internal_current ()) {
3534 get_thread_dump (mono_thread_info_current (), &ud);
3536 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3539 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3541 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3544 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3546 for (i = 0; i < ud.nframes; ++i) {
3547 MonoStackFrameInfo *frame = &ud.frames [i];
3548 MonoMethod *method = NULL;
3549 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3553 sf->native_offset = frame->native_offset;
3555 if (frame->type == FRAME_TYPE_MANAGED)
3556 method = mono_jit_info_get_method (frame->ji);
3559 sf->method_address = (gsize) frame->ji->code_start;
3561 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3564 MONO_OBJECT_SETREF (sf, method, rm);
3566 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3568 sf->il_offset = location->il_offset;
3570 if (location && location->source_file) {
3571 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3572 sf->line = location->row;
3573 sf->column = location->column;
3575 mono_debug_free_source_location (location);
3580 mono_array_setref (thread_frames, i, sf);
3586 return is_ok (error);
3590 * mono_threads_request_thread_dump:
3592 * Ask all threads except the current to print their stacktrace to stdout.
3595 mono_threads_request_thread_dump (void)
3597 /*The new thread dump code runs out of the finalizer thread. */
3598 thread_dump_requested = TRUE;
3599 mono_gc_finalize_notify ();
3604 gint allocated; /* +1 so that refs [allocated] == NULL */
3608 typedef struct ref_stack RefStack;
3611 ref_stack_new (gint initial_size)
3615 initial_size = MAX (initial_size, 16) + 1;
3616 rs = g_new0 (RefStack, 1);
3617 rs->refs = g_new0 (gpointer, initial_size);
3618 rs->allocated = initial_size;
3623 ref_stack_destroy (gpointer ptr)
3625 RefStack *rs = (RefStack *)ptr;
3634 ref_stack_push (RefStack *rs, gpointer ptr)
3636 g_assert (rs != NULL);
3638 if (rs->bottom >= rs->allocated) {
3639 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3640 rs->allocated <<= 1;
3641 rs->refs [rs->allocated] = NULL;
3643 rs->refs [rs->bottom++] = ptr;
3647 ref_stack_pop (RefStack *rs)
3649 if (rs == NULL || rs->bottom == 0)
3653 rs->refs [rs->bottom] = NULL;
3657 ref_stack_find (RefStack *rs, gpointer ptr)
3664 for (refs = rs->refs; refs && *refs; refs++) {
3672 * mono_thread_push_appdomain_ref:
3674 * Register that the current thread may have references to objects in domain
3675 * @domain on its stack. Each call to this function should be paired with a
3676 * call to pop_appdomain_ref.
3679 mono_thread_push_appdomain_ref (MonoDomain *domain)
3681 MonoInternalThread *thread = mono_thread_internal_current ();
3684 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3685 SPIN_LOCK (thread->lock_thread_id);
3686 if (thread->appdomain_refs == NULL)
3687 thread->appdomain_refs = ref_stack_new (16);
3688 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3689 SPIN_UNLOCK (thread->lock_thread_id);
3694 mono_thread_pop_appdomain_ref (void)
3696 MonoInternalThread *thread = mono_thread_internal_current ();
3699 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3700 SPIN_LOCK (thread->lock_thread_id);
3701 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3702 SPIN_UNLOCK (thread->lock_thread_id);
3707 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3710 SPIN_LOCK (thread->lock_thread_id);
3711 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3712 SPIN_UNLOCK (thread->lock_thread_id);
3717 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3719 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3722 typedef struct abort_appdomain_data {
3723 struct wait_data wait;
3725 } abort_appdomain_data;
3728 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3730 MonoInternalThread *thread = (MonoInternalThread*)value;
3731 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3732 MonoDomain *domain = data->domain;
3734 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3735 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3737 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3738 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3739 data->wait.threads [data->wait.num] = thread;
3742 /* Just ignore the rest, we can't do anything with
3750 * mono_threads_abort_appdomain_threads:
3752 * Abort threads which has references to the given appdomain.
3755 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3757 #ifdef __native_client__
3761 abort_appdomain_data user_data;
3763 int orig_timeout = timeout;
3766 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3768 start_time = mono_msec_ticks ();
3770 mono_threads_lock ();
3772 user_data.domain = domain;
3773 user_data.wait.num = 0;
3774 /* This shouldn't take any locks */
3775 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3776 mono_threads_unlock ();
3778 if (user_data.wait.num > 0) {
3779 /* Abort the threads outside the threads lock */
3780 for (i = 0; i < user_data.wait.num; ++i)
3781 mono_thread_internal_abort (user_data.wait.threads [i]);
3784 * We should wait for the threads either to abort, or to leave the
3785 * domain. We can't do the latter, so we wait with a timeout.
3787 wait_for_tids (&user_data.wait, 100, FALSE);
3790 /* Update remaining time */
3791 timeout -= mono_msec_ticks () - start_time;
3792 start_time = mono_msec_ticks ();
3794 if (orig_timeout != -1 && timeout < 0)
3797 while (user_data.wait.num > 0);
3799 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3805 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3807 MonoInternalThread *thread = (MonoInternalThread*)value;
3808 MonoDomain *domain = (MonoDomain*)user_data;
3811 /* No locking needed here */
3812 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3814 if (thread->cached_culture_info) {
3815 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3816 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3817 if (obj && obj->vtable->domain == domain)
3818 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3824 * mono_threads_clear_cached_culture:
3826 * Clear the cached_current_culture from all threads if it is in the
3830 mono_threads_clear_cached_culture (MonoDomain *domain)
3832 mono_threads_lock ();
3833 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3834 mono_threads_unlock ();
3838 * mono_thread_get_undeniable_exception:
3840 * Return an exception which needs to be raised when leaving a catch clause.
3841 * This is used for undeniable exception propagation.
3844 mono_thread_get_undeniable_exception (void)
3846 MonoInternalThread *thread = mono_thread_internal_current ();
3848 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3851 // We don't want to have our exception effect calls made by
3852 // the catching block
3854 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3858 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3859 * exception if the thread no longer references a dying appdomain.
3861 thread->abort_exc->trace_ips = NULL;
3862 thread->abort_exc->stack_trace = NULL;
3863 return thread->abort_exc;
3866 #if MONO_SMALL_CONFIG
3867 #define NUM_STATIC_DATA_IDX 4
3868 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3872 #define NUM_STATIC_DATA_IDX 8
3873 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3874 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3878 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3879 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3882 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3884 gpointer *static_data = (gpointer *)addr;
3886 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3887 void **ptr = (void **)static_data [i];
3892 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3893 void **p = ptr + idx;
3896 mark_func ((MonoObject**)p, gc_data);
3902 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3904 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3908 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3910 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3914 * mono_alloc_static_data
3916 * Allocate memory blocks for storing threads or context static data
3919 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3921 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3924 gpointer* static_data = *static_data_ptr;
3926 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3927 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3929 if (mono_gc_user_markers_supported ()) {
3930 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3931 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3933 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3934 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3937 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3938 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3939 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3940 *static_data_ptr = static_data;
3941 static_data [0] = static_data;
3944 for (i = 1; i <= idx; ++i) {
3945 if (static_data [i])
3948 if (mono_gc_user_markers_supported ())
3949 static_data [i] = g_malloc0 (static_data_size [i]);
3951 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3952 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3953 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3958 mono_free_static_data (gpointer* static_data)
3961 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3962 gpointer p = static_data [i];
3966 * At this point, the static data pointer array is still registered with the
3967 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3968 * data. Freeing the individual arrays without first nulling their slots
3969 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3970 * such an already freed array. See bug #13813.
3972 static_data [i] = NULL;
3973 mono_memory_write_barrier ();
3974 if (mono_gc_user_markers_supported ())
3977 mono_gc_free_fixed (p);
3979 mono_gc_free_fixed (static_data);
3983 * mono_init_static_data_info
3985 * Initializes static data counters
3987 static void mono_init_static_data_info (StaticDataInfo *static_data)
3989 static_data->idx = 0;
3990 static_data->offset = 0;
3991 static_data->freelist = NULL;
3995 * mono_alloc_static_data_slot
3997 * Generates an offset for static data. static_data contains the counters
3998 * used to generate it.
4001 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4003 if (!static_data->idx && !static_data->offset) {
4005 * we use the first chunk of the first allocation also as
4006 * an array for the rest of the data
4008 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4010 static_data->offset += align - 1;
4011 static_data->offset &= ~(align - 1);
4012 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4013 static_data->idx ++;
4014 g_assert (size <= static_data_size [static_data->idx]);
4015 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4016 static_data->offset = 0;
4018 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4019 static_data->offset += size;
4024 * LOCKING: requires that threads_mutex is held
4027 context_adjust_static_data (MonoAppContext *ctx)
4029 if (context_static_info.offset || context_static_info.idx > 0) {
4030 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4031 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4032 ctx->data->static_data = ctx->static_data;
4037 * LOCKING: requires that threads_mutex is held
4040 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4042 MonoInternalThread *thread = (MonoInternalThread *)value;
4043 guint32 offset = GPOINTER_TO_UINT (user);
4045 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4049 * LOCKING: requires that threads_mutex is held
4052 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4054 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4059 guint32 offset = GPOINTER_TO_UINT (user);
4060 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4061 ctx->data->static_data = ctx->static_data;
4064 static StaticDataFreeList*
4065 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4067 StaticDataFreeList* prev = NULL;
4068 StaticDataFreeList* tmp = static_data->freelist;
4070 if (tmp->size == size) {
4072 prev->next = tmp->next;
4074 static_data->freelist = tmp->next;
4083 #if SIZEOF_VOID_P == 4
4090 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4092 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4094 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4095 MonoBitSet *rb = sets [idx];
4096 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4097 offset /= sizeof (uintptr_t);
4098 /* offset is now the bitmap offset */
4099 for (int i = 0; i < numbits; ++i) {
4100 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4101 mono_bitset_set_fast (rb, offset + i);
4106 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4108 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4109 MonoBitSet *rb = sets [idx];
4110 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4111 offset /= sizeof (uintptr_t);
4112 /* offset is now the bitmap offset */
4113 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4114 mono_bitset_clear_fast (rb, offset + i);
4118 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4120 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4122 StaticDataInfo *info;
4125 if (static_type == SPECIAL_STATIC_THREAD) {
4126 info = &thread_static_info;
4127 sets = thread_reference_bitmaps;
4129 info = &context_static_info;
4130 sets = context_reference_bitmaps;
4133 mono_threads_lock ();
4135 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4139 offset = item->offset;
4142 offset = mono_alloc_static_data_slot (info, size, align);
4145 update_reference_bitmap (sets, offset, bitmap, numbits);
4147 if (static_type == SPECIAL_STATIC_THREAD) {
4148 /* This can be called during startup */
4149 if (threads != NULL)
4150 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4152 if (contexts != NULL)
4153 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4155 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4158 mono_threads_unlock ();
4164 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4166 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4168 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4169 return get_thread_static_data (thread, offset);
4171 return get_context_static_data (thread->current_appcontext, offset);
4176 mono_get_special_static_data (guint32 offset)
4178 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4187 * LOCKING: requires that threads_mutex is held
4190 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4192 MonoInternalThread *thread = (MonoInternalThread *)value;
4193 OffsetSize *data = (OffsetSize *)user;
4194 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4195 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4198 if (!thread->static_data || !thread->static_data [idx])
4200 ptr = ((char*) thread->static_data [idx]) + off;
4201 mono_gc_bzero_atomic (ptr, data->size);
4205 * LOCKING: requires that threads_mutex is held
4208 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4210 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4215 OffsetSize *data = (OffsetSize *)user;
4216 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4217 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4220 if (!ctx->static_data || !ctx->static_data [idx])
4223 ptr = ((char*) ctx->static_data [idx]) + off;
4224 mono_gc_bzero_atomic (ptr, data->size);
4228 do_free_special_slot (guint32 offset, guint32 size)
4230 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4232 StaticDataInfo *info;
4234 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4235 info = &thread_static_info;
4236 sets = thread_reference_bitmaps;
4238 info = &context_static_info;
4239 sets = context_reference_bitmaps;
4242 guint32 data_offset = offset;
4243 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4244 OffsetSize data = { data_offset, size };
4246 clear_reference_bitmap (sets, data.offset, data.size);
4248 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4249 if (threads != NULL)
4250 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4252 if (contexts != NULL)
4253 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4256 if (!mono_runtime_is_shutting_down ()) {
4257 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4259 item->offset = offset;
4262 item->next = info->freelist;
4263 info->freelist = item;
4268 do_free_special (gpointer key, gpointer value, gpointer data)
4270 MonoClassField *field = (MonoClassField *)key;
4271 guint32 offset = GPOINTER_TO_UINT (value);
4274 size = mono_type_size (field->type, &align);
4275 do_free_special_slot (offset, size);
4279 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4281 mono_threads_lock ();
4283 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4285 mono_threads_unlock ();
4289 static void CALLBACK dummy_apc (ULONG_PTR param)
4295 * mono_thread_execute_interruption
4297 * Performs the operation that the requested thread state requires (abort,
4300 static MonoException*
4301 mono_thread_execute_interruption (void)
4303 MonoInternalThread *thread = mono_thread_internal_current ();
4304 MonoThread *sys_thread = mono_thread_current ();
4306 LOCK_THREAD (thread);
4308 /* MonoThread::interruption_requested can only be changed with atomics */
4309 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4310 /* this will consume pending APC calls */
4312 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4314 InterlockedDecrement (&thread_interruption_requested);
4316 /* Clear the interrupted flag of the thread so it can wait again */
4317 mono_thread_info_clear_self_interrupt ();
4320 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4321 if (sys_thread->pending_exception) {
4324 exc = sys_thread->pending_exception;
4325 sys_thread->pending_exception = NULL;
4327 UNLOCK_THREAD (thread);
4329 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4330 UNLOCK_THREAD (thread);
4331 g_assert (sys_thread->pending_exception == NULL);
4332 if (thread->abort_exc == NULL) {
4334 * This might be racy, but it has to be called outside the lock
4335 * since it calls managed code.
4337 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4339 return thread->abort_exc;
4341 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4342 /* calls UNLOCK_THREAD (thread) */
4343 self_suspend_internal ();
4346 else if ((thread->state & ThreadState_StopRequested) != 0) {
4347 /* FIXME: do this through the JIT? */
4349 UNLOCK_THREAD (thread);
4351 mono_thread_exit ();
4353 } else if (thread->thread_interrupt_requested) {
4355 thread->thread_interrupt_requested = FALSE;
4356 UNLOCK_THREAD (thread);
4358 return(mono_get_exception_thread_interrupted ());
4361 UNLOCK_THREAD (thread);
4367 * mono_thread_request_interruption
4369 * A signal handler can call this method to request the interruption of a
4370 * thread. The result of the interruption will depend on the current state of
4371 * the thread. If the result is an exception that needs to be throw, it is
4372 * provided as return value.
4375 mono_thread_request_interruption (gboolean running_managed)
4377 MonoInternalThread *thread = mono_thread_internal_current ();
4379 /* The thread may already be stopping */
4384 if (thread->interrupt_on_stop &&
4385 thread->state & ThreadState_StopRequested &&
4386 thread->state & ThreadState_Background)
4389 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4391 InterlockedIncrement (&thread_interruption_requested);
4393 if (!running_managed || is_running_protected_wrapper ()) {
4394 /* Can't stop while in unmanaged code. Increase the global interruption
4395 request count. When exiting the unmanaged method the count will be
4396 checked and the thread will be interrupted. */
4398 /* this will awake the thread if it is in WaitForSingleObject
4400 /* Our implementation of this function ignores the func argument */
4402 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4404 mono_thread_info_self_interrupt ();
4409 return mono_thread_execute_interruption ();
4413 /*This function should be called by a thread after it has exited all of
4414 * its handle blocks at interruption time.*/
4416 mono_thread_resume_interruption (void)
4418 MonoInternalThread *thread = mono_thread_internal_current ();
4419 gboolean still_aborting;
4421 /* The thread may already be stopping */
4425 LOCK_THREAD (thread);
4426 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4427 UNLOCK_THREAD (thread);
4429 /*This can happen if the protected block called Thread::ResetAbort*/
4430 if (!still_aborting)
4433 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4435 InterlockedIncrement (&thread_interruption_requested);
4437 mono_thread_info_self_interrupt ();
4439 return mono_thread_execute_interruption ();
4442 gboolean mono_thread_interruption_requested ()
4444 if (thread_interruption_requested) {
4445 MonoInternalThread *thread = mono_thread_internal_current ();
4446 /* The thread may already be stopping */
4448 return (thread->interruption_requested);
4453 static MonoException*
4454 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4456 MonoInternalThread *thread = mono_thread_internal_current ();
4458 /* The thread may already be stopping */
4461 if (!thread->interruption_requested)
4463 if (!bypass_abort_protection && is_running_protected_wrapper ())
4466 return mono_thread_execute_interruption ();
4470 * Performs the interruption of the current thread, if one has been requested,
4471 * and the thread is not running a protected wrapper.
4472 * Return the exception which needs to be thrown, if any.
4475 mono_thread_interruption_checkpoint (void)
4477 return mono_thread_interruption_checkpoint_request (FALSE);
4481 * Performs the interruption of the current thread, if one has been requested.
4482 * Return the exception which needs to be thrown, if any.
4485 mono_thread_force_interruption_checkpoint_noraise (void)
4487 return mono_thread_interruption_checkpoint_request (TRUE);
4491 * mono_set_pending_exception:
4493 * Set the pending exception of the current thread to EXC.
4494 * The exception will be thrown when execution returns to managed code.
4497 mono_set_pending_exception (MonoException *exc)
4499 MonoThread *thread = mono_thread_current ();
4501 /* The thread may already be stopping */
4505 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4507 mono_thread_request_interruption (FALSE);
4511 * mono_thread_interruption_request_flag:
4513 * Returns the address of a flag that will be non-zero if an interruption has
4514 * been requested for a thread. The thread to interrupt may not be the current
4515 * thread, so an additional call to mono_thread_interruption_requested() or
4516 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4519 gint32* mono_thread_interruption_request_flag ()
4521 return &thread_interruption_requested;
4525 mono_thread_init_apartment_state (void)
4528 MonoInternalThread* thread = mono_thread_internal_current ();
4530 /* Positive return value indicates success, either
4531 * S_OK if this is first CoInitialize call, or
4532 * S_FALSE if CoInitialize already called, but with same
4533 * threading model. A negative value indicates failure,
4534 * probably due to trying to change the threading model.
4536 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4537 ? COINIT_APARTMENTTHREADED
4538 : COINIT_MULTITHREADED) < 0) {
4539 thread->apartment_state = ThreadApartmentState_Unknown;
4545 mono_thread_cleanup_apartment_state (void)
4548 MonoInternalThread* thread = mono_thread_internal_current ();
4550 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4557 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4559 LOCK_THREAD (thread);
4560 thread->state |= state;
4561 UNLOCK_THREAD (thread);
4565 * mono_thread_test_and_set_state:
4567 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4569 * Returns TRUE is @set was OR'd in.
4572 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4574 LOCK_THREAD (thread);
4576 if ((thread->state & test) != 0) {
4577 UNLOCK_THREAD (thread);
4581 thread->state |= set;
4582 UNLOCK_THREAD (thread);
4588 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4590 LOCK_THREAD (thread);
4591 thread->state &= ~state;
4592 UNLOCK_THREAD (thread);
4596 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4598 gboolean ret = FALSE;
4600 LOCK_THREAD (thread);
4602 if ((thread->state & test) != 0) {
4606 UNLOCK_THREAD (thread);
4612 self_interrupt_thread (void *_unused)
4615 MonoThreadInfo *info;
4617 exc = mono_thread_execute_interruption ();
4619 if (mono_threads_is_coop_enabled ()) {
4620 /* We can return from an async call in coop, as
4621 * it's simply called when exiting the safepoint */
4625 g_error ("%s: we can't resume from an async call", __func__);
4628 info = mono_thread_info_current ();
4630 /* We must use _with_context since we didn't trampoline into the runtime */
4631 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. */
4635 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4639 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4643 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4645 MonoJitInfo **dest = (MonoJitInfo **)data;
4651 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4653 MonoJitInfo *ji = NULL;
4658 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4659 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4660 * where we hold runtime locks.
4662 if (!mono_threads_is_coop_enabled ())
4663 mono_thread_info_set_is_async_context (TRUE);
4664 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4665 if (!mono_threads_is_coop_enabled ())
4666 mono_thread_info_set_is_async_context (FALSE);
4671 MonoInternalThread *thread;
4672 gboolean install_async_abort;
4673 MonoThreadInfoInterruptToken *interrupt_token;
4676 static SuspendThreadResult
4677 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4679 AbortThreadData *data = (AbortThreadData *)ud;
4680 MonoInternalThread *thread = data->thread;
4681 MonoJitInfo *ji = NULL;
4682 gboolean protected_wrapper;
4683 gboolean running_managed;
4685 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4686 return MonoResumeThread;
4689 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4690 The protected block code will give them a chance when appropriate.
4692 if (thread->abort_protected_block_count)
4693 return MonoResumeThread;
4695 /*someone is already interrupting it*/
4696 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4697 return MonoResumeThread;
4699 InterlockedIncrement (&thread_interruption_requested);
4701 ji = mono_thread_info_get_last_managed (info);
4702 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4703 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4705 if (!protected_wrapper && running_managed) {
4706 /*We are in managed code*/
4707 /*Set the thread to call */
4708 if (data->install_async_abort)
4709 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4710 return MonoResumeThread;
4713 * This will cause waits to be broken.
4714 * It will also prevent the thread from entering a wait, so if the thread returns
4715 * from the wait before it receives the abort signal, it will just spin in the wait
4716 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4719 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4721 return MonoResumeThread;
4726 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4728 AbortThreadData data;
4730 g_assert (thread != mono_thread_internal_current ());
4732 data.thread = thread;
4733 data.install_async_abort = install_async_abort;
4734 data.interrupt_token = NULL;
4736 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4737 if (data.interrupt_token)
4738 mono_thread_info_finish_interrupt (data.interrupt_token);
4739 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4743 self_abort_internal (MonoError *error)
4747 mono_error_init (error);
4749 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4750 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4753 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.
4755 exc = mono_thread_request_interruption (TRUE);
4757 mono_error_set_exception_instance (error, exc);
4759 mono_thread_info_self_interrupt ();
4763 MonoInternalThread *thread;
4765 MonoThreadInfoInterruptToken *interrupt_token;
4766 } SuspendThreadData;
4768 static SuspendThreadResult
4769 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4771 SuspendThreadData *data = (SuspendThreadData *)ud;
4772 MonoInternalThread *thread = data->thread;
4773 MonoJitInfo *ji = NULL;
4774 gboolean protected_wrapper;
4775 gboolean running_managed;
4777 ji = mono_thread_info_get_last_managed (info);
4778 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4779 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4781 if (running_managed && !protected_wrapper) {
4782 if (mono_threads_is_coop_enabled ()) {
4783 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4784 return MonoResumeThread;
4786 thread->state &= ~ThreadState_SuspendRequested;
4787 thread->state |= ThreadState_Suspended;
4788 return KeepSuspended;
4791 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4792 InterlockedIncrement (&thread_interruption_requested);
4793 if (data->interrupt)
4794 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4796 return MonoResumeThread;
4800 /* LOCKING: called with @thread synch_cs held, and releases it */
4802 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4804 SuspendThreadData data;
4806 g_assert (thread != mono_thread_internal_current ());
4808 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4810 thread->self_suspended = FALSE;
4812 data.thread = thread;
4813 data.interrupt = interrupt;
4814 data.interrupt_token = NULL;
4816 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4817 if (data.interrupt_token)
4818 mono_thread_info_finish_interrupt (data.interrupt_token);
4820 UNLOCK_THREAD (thread);
4823 /* LOCKING: called with @thread synch_cs held, and releases it */
4825 self_suspend_internal (void)
4827 MonoInternalThread *thread;
4829 MonoOSEventWaitRet res;
4831 thread = mono_thread_internal_current ();
4833 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4835 thread->self_suspended = TRUE;
4837 thread->state &= ~ThreadState_SuspendRequested;
4838 thread->state |= ThreadState_Suspended;
4840 UNLOCK_THREAD (thread);
4842 event = thread->suspended;
4845 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT);
4846 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4851 * mono_thread_is_foreign:
4852 * @thread: the thread to query
4854 * This function allows one to determine if a thread was created by the mono runtime and has
4855 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4857 * Returns: TRUE if @thread was not created by the runtime.
4860 mono_thread_is_foreign (MonoThread *thread)
4862 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4863 return info->runtime_thread == FALSE;
4867 * mono_add_joinable_thread:
4869 * Add TID to the list of joinable threads.
4870 * LOCKING: Acquires the threads lock.
4873 mono_threads_add_joinable_thread (gpointer tid)
4877 * We cannot detach from threads because it causes problems like
4878 * 2fd16f60/r114307. So we collect them and join them when
4879 * we have time (in he finalizer thread).
4881 joinable_threads_lock ();
4882 if (!joinable_threads)
4883 joinable_threads = g_hash_table_new (NULL, NULL);
4884 g_hash_table_insert (joinable_threads, tid, tid);
4885 joinable_thread_count ++;
4886 joinable_threads_unlock ();
4888 mono_gc_finalize_notify ();
4893 * mono_threads_join_threads:
4895 * Join all joinable threads. This is called from the finalizer thread.
4896 * LOCKING: Acquires the threads lock.
4899 mono_threads_join_threads (void)
4902 GHashTableIter iter;
4909 if (!joinable_thread_count)
4913 joinable_threads_lock ();
4915 if (g_hash_table_size (joinable_threads)) {
4916 g_hash_table_iter_init (&iter, joinable_threads);
4917 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4918 thread = (pthread_t)tid;
4919 g_hash_table_remove (joinable_threads, key);
4920 joinable_thread_count --;
4923 joinable_threads_unlock ();
4925 if (thread != pthread_self ()) {
4927 /* This shouldn't block */
4928 mono_native_thread_join (thread);
4941 * Wait for thread TID to exit.
4942 * LOCKING: Acquires the threads lock.
4945 mono_thread_join (gpointer tid)
4949 gboolean found = FALSE;
4951 joinable_threads_lock ();
4952 if (!joinable_threads)
4953 joinable_threads = g_hash_table_new (NULL, NULL);
4954 if (g_hash_table_lookup (joinable_threads, tid)) {
4955 g_hash_table_remove (joinable_threads, tid);
4956 joinable_thread_count --;
4959 joinable_threads_unlock ();
4962 thread = (pthread_t)tid;
4964 mono_native_thread_join (thread);
4970 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4972 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4973 mono_thread_interruption_checkpoint ();
4977 mono_thread_internal_unhandled_exception (MonoObject* exc)
4979 MonoClass *klass = exc->vtable->klass;
4980 if (is_threadabort_exception (klass)) {
4981 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4982 } else if (!is_appdomainunloaded_exception (klass)
4983 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4984 mono_unhandled_exception (exc);
4985 if (mono_environment_exitcode_get () == 1) {
4986 mono_environment_exitcode_set (255);
4987 mono_invoke_unhandled_exception_hook (exc);
4988 g_assert_not_reached ();
4994 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4997 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
4998 mono_error_set_pending_exception (&error);
5002 * mono_threads_attach_coop: called by native->managed wrappers
5006 * - @return: the original domain which needs to be restored, or NULL.
5009 * - @dummy: contains the original domain
5010 * - @return: a cookie containing current MonoThreadInfo*.
5013 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5016 gboolean fresh_thread = FALSE;
5019 /* Happens when called from AOTed code which is only used in the root domain. */
5020 domain = mono_get_root_domain ();
5025 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5026 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5027 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5028 * we're only responsible for making the cookie. */
5029 if (mono_threads_is_coop_enabled ()) {
5030 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5031 fresh_thread = !info || !mono_thread_info_is_live (info);
5034 if (!mono_thread_internal_current ()) {
5035 mono_thread_attach_full (domain, FALSE);
5038 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5041 orig = mono_domain_get ();
5043 mono_domain_set (domain, TRUE);
5045 if (!mono_threads_is_coop_enabled ())
5046 return orig != domain ? orig : NULL;
5050 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5051 * return the right cookie. */
5052 return mono_threads_enter_gc_unsafe_region_cookie ();
5055 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5056 return mono_threads_enter_gc_unsafe_region (dummy);
5061 * mono_threads_detach_coop: called by native->managed wrappers
5064 * - @cookie: the original domain which needs to be restored, or NULL.
5068 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5069 * - @dummy: contains the original domain
5072 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5074 MonoDomain *domain, *orig;
5076 if (!mono_threads_is_coop_enabled ()) {
5077 orig = (MonoDomain*) cookie;
5079 mono_domain_set (orig, TRUE);
5081 orig = (MonoDomain*) *dummy;
5083 domain = mono_domain_get ();
5086 /* it won't do anything if cookie is NULL
5087 * thread state RUNNING -> (RUNNING|BLOCKING) */
5088 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5090 if (orig != domain) {
5092 mono_domain_unset ();
5094 mono_domain_set (orig, TRUE);
5100 mono_threads_begin_abort_protected_block (void)
5102 MonoInternalThread *thread;
5104 thread = mono_thread_internal_current ();
5105 ++thread->abort_protected_block_count;
5106 mono_memory_barrier ();
5110 mono_threads_end_abort_protected_block (void)
5112 MonoInternalThread *thread;
5114 thread = mono_thread_internal_current ();
5116 mono_memory_barrier ();
5117 --thread->abort_protected_block_count;
5121 mono_thread_try_resume_interruption (void)
5123 MonoInternalThread *thread;
5125 thread = mono_thread_internal_current ();
5126 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5129 return mono_thread_resume_interruption ();
5133 /* Returns TRUE if the current thread is ready to be interrupted. */
5135 mono_threads_is_ready_to_be_interrupted (void)
5137 MonoInternalThread *thread;
5139 thread = mono_thread_internal_current ();
5140 LOCK_THREAD (thread);
5141 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5142 UNLOCK_THREAD (thread);
5146 if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5147 UNLOCK_THREAD (thread);
5151 UNLOCK_THREAD (thread);
5157 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5159 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5161 if (internal->thread_info) {
5162 g_string_append (text, ", state : ");
5163 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5166 if (internal->owned_mutexes) {
5169 g_string_append (text, ", owns : [");
5170 for (i = 0; i < internal->owned_mutexes->len; i++)
5171 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5172 g_string_append (text, "]");
5177 mono_thread_internal_is_current (MonoInternalThread *internal)
5179 g_assert (internal);
5180 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));