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)
19 #include <mono/metadata/object.h>
20 #include <mono/metadata/domain-internals.h>
21 #include <mono/metadata/profiler-private.h>
22 #include <mono/metadata/threads.h>
23 #include <mono/metadata/threads-types.h>
24 #include <mono/metadata/exception.h>
25 #include <mono/metadata/environment.h>
26 #include <mono/metadata/monitor.h>
27 #include <mono/metadata/gc-internals.h>
28 #include <mono/metadata/marshal.h>
29 #include <mono/metadata/runtime.h>
30 #include <mono/io-layer/io-layer.h>
31 #include <mono/metadata/object-internals.h>
32 #include <mono/metadata/mono-debug-debugger.h>
33 #include <mono/utils/monobitset.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/hazard-pointer.h>
40 #include <mono/utils/mono-tls.h>
41 #include <mono/utils/atomic.h>
42 #include <mono/utils/mono-memory-model.h>
44 #include <mono/metadata/gc-internals.h>
50 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
51 #define USE_TKILL_ON_ANDROID 1
54 #ifdef PLATFORM_ANDROID
57 #ifdef USE_TKILL_ON_ANDROID
58 extern int tkill (pid_t tid, int signal);
62 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
63 #define THREAD_DEBUG(a)
64 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_WAIT_DEBUG(a)
66 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
67 #define LIBGC_DEBUG(a)
69 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
70 #define SPIN_LOCK(i) do { \
71 if (SPIN_TRYLOCK (i)) \
75 #define SPIN_UNLOCK(i) i = 0
77 #define LOCK_THREAD(thread) lock_thread((thread))
78 #define UNLOCK_THREAD(thread) unlock_thread((thread))
80 /* Provide this for systems with glib < 2.6 */
81 #ifndef G_GSIZE_FORMAT
82 # if GLIB_SIZEOF_LONG == 8
83 # define G_GSIZE_FORMAT "lu"
85 # define G_GSIZE_FORMAT "u"
91 guint32 (*func)(void *);
107 typedef struct _StaticDataFreeList StaticDataFreeList;
108 struct _StaticDataFreeList {
109 StaticDataFreeList *next;
117 StaticDataFreeList *freelist;
120 /* Number of cached culture objects in the MonoThread->cached_culture_info array
121 * (per-type): we use the first NUM entries for CultureInfo and the last for
122 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
124 #define NUM_CACHED_CULTURES 4
125 #define CULTURES_START_IDX 0
126 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
128 /* Controls access to the 'threads' hash table */
129 static void mono_threads_lock (void);
130 static void mono_threads_unlock (void);
131 static MonoCoopMutex threads_mutex;
133 /* Controls access to the 'joinable_threads' hash table */
134 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
135 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
136 static mono_mutex_t joinable_threads_mutex;
138 /* Holds current status of static data heap */
139 static StaticDataInfo thread_static_info;
140 static StaticDataInfo context_static_info;
142 /* The hash of existing threads (key is thread ID, value is
143 * MonoInternalThread*) that need joining before exit
145 static MonoGHashTable *threads=NULL;
147 /* List of app context GC handles.
148 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
150 static GHashTable *contexts = NULL;
152 /* Cleanup queue for contexts. */
153 static MonoReferenceQueue *context_queue;
156 * Threads which are starting up and they are not in the 'threads' hash yet.
157 * When handle_store is called for a thread, it will be removed from this hash table.
158 * Protected by mono_threads_lock ().
160 static MonoGHashTable *threads_starting_up = NULL;
162 /* The TLS key that holds the MonoObject assigned to each thread */
163 static MonoNativeTlsKey current_object_key;
166 /* Protected by the threads lock */
167 static GHashTable *joinable_threads;
168 static int joinable_thread_count;
170 #ifdef MONO_HAVE_FAST_TLS
171 /* we need to use both the Tls* functions and __thread because
172 * the gc needs to see all the threads
174 MONO_FAST_TLS_DECLARE(tls_current_object);
175 #define SET_CURRENT_OBJECT(x) do { \
176 MONO_FAST_TLS_SET (tls_current_object, x); \
177 mono_native_tls_set_value (current_object_key, x); \
179 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
181 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
182 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
185 /* function called at thread start */
186 static MonoThreadStartCB mono_thread_start_cb = NULL;
188 /* function called at thread attach */
189 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
191 /* function called at thread cleanup */
192 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
194 /* function called to notify the runtime about a pending exception on the current thread */
195 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
197 /* The default stack size for each thread */
198 static guint32 default_stacksize = 0;
199 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
201 static void thread_adjust_static_data (MonoInternalThread *thread);
202 static void context_adjust_static_data (MonoAppContext *ctx);
203 static void mono_free_static_data (gpointer* static_data);
204 static void mono_init_static_data_info (StaticDataInfo *static_data);
205 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
206 static gboolean mono_thread_resume (MonoInternalThread* thread);
207 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
208 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
209 static void self_suspend_internal (MonoInternalThread *thread);
211 static MonoException* mono_thread_execute_interruption (void);
212 static void ref_stack_destroy (gpointer rs);
214 /* Spin lock for InterlockedXXX 64 bit functions */
215 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
216 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
217 static mono_mutex_t interlocked_mutex;
219 /* global count of thread interruptions requested */
220 static gint32 thread_interruption_requested = 0;
222 /* Event signaled when a thread changes its background mode */
223 static HANDLE background_change_event;
225 static gboolean shutting_down = FALSE;
227 static gint32 managed_thread_id_counter = 0;
230 mono_threads_lock (void)
232 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
236 mono_threads_unlock (void)
238 mono_locks_coop_release (&threads_mutex, ThreadsLock);
243 get_next_managed_thread_id (void)
245 return InterlockedIncrement (&managed_thread_id_counter);
249 mono_thread_get_tls_key (void)
251 return current_object_key;
255 mono_thread_get_tls_offset (void)
258 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
262 static inline MonoNativeThreadId
263 thread_get_tid (MonoInternalThread *thread)
265 /* We store the tid as a guint64 to keep the object layout constant between platforms */
266 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
269 /* handle_store() and handle_remove() manage the array of threads that
270 * still need to be waited for when the main thread exits.
272 * If handle_store() returns FALSE the thread must not be started
273 * because Mono is shutting down.
275 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
277 mono_threads_lock ();
279 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
281 if (threads_starting_up)
282 mono_g_hash_table_remove (threads_starting_up, thread);
284 if (shutting_down && !force_attach) {
285 mono_threads_unlock ();
290 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
291 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
294 /* We don't need to duplicate thread->handle, because it is
295 * only closed when the thread object is finalized by the GC.
297 g_assert (thread->internal_thread);
298 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
299 thread->internal_thread);
301 mono_threads_unlock ();
306 static gboolean handle_remove(MonoInternalThread *thread)
309 gsize tid = thread->tid;
311 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
313 mono_threads_lock ();
316 /* We have to check whether the thread object for the
317 * tid is still the same in the table because the
318 * thread might have been destroyed and the tid reused
319 * in the meantime, in which case the tid would be in
320 * the table, but with another thread object.
322 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
323 mono_g_hash_table_remove (threads, (gpointer)tid);
332 mono_threads_unlock ();
334 /* Don't close the handle here, wait for the object finalizer
335 * to do it. Otherwise, the following race condition applies:
337 * 1) Thread exits (and handle_remove() closes the handle)
339 * 2) Some other handle is reassigned the same slot
341 * 3) Another thread tries to join the first thread, and
342 * blocks waiting for the reassigned handle to be signalled
343 * (which might never happen). This is possible, because the
344 * thread calling Join() still has a reference to the first
350 static void ensure_synch_cs_set (MonoInternalThread *thread)
352 MonoCoopMutex *synch_cs;
354 if (thread->synch_cs != NULL) {
358 synch_cs = g_new0 (MonoCoopMutex, 1);
359 mono_coop_mutex_init_recursive (synch_cs);
361 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
362 synch_cs, NULL) != NULL) {
363 /* Another thread must have installed this CS */
364 mono_coop_mutex_destroy (synch_cs);
370 lock_thread (MonoInternalThread *thread)
372 if (!thread->synch_cs)
373 ensure_synch_cs_set (thread);
375 g_assert (thread->synch_cs);
377 mono_coop_mutex_lock (thread->synch_cs);
381 unlock_thread (MonoInternalThread *thread)
383 mono_coop_mutex_unlock (thread->synch_cs);
387 * NOTE: this function can be called also for threads different from the current one:
388 * make sure no code called from it will ever assume it is run on the thread that is
389 * getting cleaned up.
391 static void thread_cleanup (MonoInternalThread *thread)
393 g_assert (thread != NULL);
395 if (thread->abort_state_handle) {
396 mono_gchandle_free (thread->abort_state_handle);
397 thread->abort_state_handle = 0;
399 thread->abort_exc = NULL;
400 thread->current_appcontext = NULL;
403 * This is necessary because otherwise we might have
404 * cross-domain references which will not get cleaned up when
405 * the target domain is unloaded.
407 if (thread->cached_culture_info) {
409 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
410 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
414 * thread->synch_cs can be NULL if this was called after
415 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
416 * This can happen only during shutdown.
417 * The shutting_down flag is not always set, so we can't assert on it.
419 if (thread->synch_cs)
420 LOCK_THREAD (thread);
422 thread->state |= ThreadState_Stopped;
423 thread->state &= ~ThreadState_Background;
425 if (thread->synch_cs)
426 UNLOCK_THREAD (thread);
429 An interruption request has leaked to cleanup. Adjust the global counter.
431 This can happen is the abort source thread finds the abortee (this) thread
432 in unmanaged code. If this thread never trips back to managed code or check
433 the local flag it will be left set and positively unbalance the global counter.
435 Leaving the counter unbalanced will cause a performance degradation since all threads
436 will now keep checking their local flags all the time.
438 if (InterlockedExchange (&thread->interruption_requested, 0))
439 InterlockedDecrement (&thread_interruption_requested);
441 /* if the thread is not in the hash it has been removed already */
442 if (!handle_remove (thread)) {
443 if (thread == mono_thread_internal_current ()) {
444 mono_domain_unset ();
445 mono_memory_barrier ();
447 /* This needs to be called even if handle_remove () fails */
448 if (mono_thread_cleanup_fn)
449 mono_thread_cleanup_fn (thread_get_tid (thread));
452 mono_release_type_locks (thread);
454 mono_profiler_thread_end (thread->tid);
456 if (thread == mono_thread_internal_current ()) {
458 * This will signal async signal handlers that the thread has exited.
459 * The profiler callback needs this to be set, so it cannot be done earlier.
461 mono_domain_unset ();
462 mono_memory_barrier ();
465 if (thread == mono_thread_internal_current ())
466 mono_thread_pop_appdomain_ref ();
468 thread->cached_culture_info = NULL;
470 mono_free_static_data (thread->static_data);
471 thread->static_data = NULL;
472 ref_stack_destroy (thread->appdomain_refs);
473 thread->appdomain_refs = NULL;
475 if (mono_thread_cleanup_fn)
476 mono_thread_cleanup_fn (thread_get_tid (thread));
478 if (mono_gc_is_moving ()) {
479 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
480 thread->thread_pinning_ref = NULL;
486 * A special static data offset (guint32) consists of 3 parts:
488 * [0] 6-bit index into the array of chunks.
489 * [6] 25-bit offset into the array.
490 * [31] Bit indicating thread or context static.
495 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
506 } SpecialStaticOffset;
508 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
509 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
511 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
512 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
513 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
514 (((SpecialStaticOffset *) &(x))->fields.f)
517 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
519 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
521 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
522 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
524 return ((char *) thread->static_data [idx]) + off;
528 get_context_static_data (MonoAppContext *ctx, guint32 offset)
530 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
532 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
533 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
535 return ((char *) ctx->static_data [idx]) + off;
539 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
541 static MonoClassField *current_thread_field = NULL;
545 if (!current_thread_field) {
546 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
547 g_assert (current_thread_field);
550 mono_class_vtable (domain, mono_defaults.thread_class);
551 mono_domain_lock (domain);
552 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
553 mono_domain_unlock (domain);
556 return (MonoThread **)get_thread_static_data (thread, offset);
560 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
562 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
564 g_assert (current->obj.vtable->domain == domain);
566 g_assert (!*current_thread_ptr);
567 *current_thread_ptr = current;
571 create_thread_object (MonoDomain *domain, MonoError *error)
573 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
574 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
579 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
583 thread = create_thread_object (domain, error);
584 if (!mono_error_ok (error))
587 MONO_OBJECT_SETREF (thread, internal_thread, internal);
592 static MonoInternalThread*
593 create_internal_thread (MonoError *error)
595 MonoInternalThread *thread;
598 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
599 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
600 if (!mono_error_ok (error))
603 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
604 mono_coop_mutex_init_recursive (thread->synch_cs);
606 thread->apartment_state = ThreadApartmentState_Unknown;
607 thread->managed_id = get_next_managed_thread_id ();
608 if (mono_gc_is_moving ()) {
609 thread->thread_pinning_ref = thread;
610 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
617 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
620 MonoDomain *domain = mono_get_root_domain ();
622 if (!candidate || candidate->obj.vtable->domain != domain) {
623 candidate = new_thread_with_internal (domain, thread, &error);
624 mono_error_raise_exception (&error); /* FIXME don't raise here */
626 set_current_thread_for_domain (domain, thread, candidate);
627 g_assert (!thread->root_domain_thread);
628 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
631 static guint32 WINAPI start_wrapper_internal(void *data)
633 MonoThreadInfo *info;
634 StartInfo *start_info = (StartInfo *)data;
635 guint32 (*start_func)(void *);
639 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
642 MonoInternalThread *internal = start_info->obj->internal_thread;
643 MonoObject *start_delegate = start_info->delegate;
644 MonoDomain *domain = start_info->obj->obj.vtable->domain;
646 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
648 /* We can be sure start_info->obj->tid and
649 * start_info->obj->handle have been set, because the thread
650 * was created suspended, and these values were set before the
654 info = mono_thread_info_current ();
656 internal->thread_info = info;
657 internal->small_id = info->small_id;
661 SET_CURRENT_OBJECT (internal);
663 /* Every thread references the appdomain which created it */
664 mono_thread_push_appdomain_ref (domain);
666 if (!mono_domain_set (domain, FALSE)) {
667 /* No point in raising an appdomain_unloaded exception here */
668 /* FIXME: Cleanup here */
669 mono_thread_pop_appdomain_ref ();
673 start_func = start_info->func;
674 start_arg = start_info->obj->start_obj;
676 start_arg = start_info->start_arg;
678 /* We have to do this here because mono_thread_new_init()
679 requires that root_domain_thread is set up. */
680 thread_adjust_static_data (internal);
681 init_root_domain_thread (internal, start_info->obj);
683 /* This MUST be called before any managed code can be
684 * executed, as it calls the callback function that (for the
685 * jit) sets the lmf marker.
687 mono_thread_new_init (tid, &tid, start_func);
688 internal->stack_ptr = &tid;
689 if (domain != mono_get_root_domain ())
690 set_current_thread_for_domain (domain, internal, start_info->obj);
692 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
694 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
696 /* On 2.0 profile (and higher), set explicitly since state might have been
698 if (internal->apartment_state == ThreadApartmentState_Unknown)
699 internal->apartment_state = ThreadApartmentState_MTA;
701 mono_thread_init_apartment_state ();
703 if(internal->start_notify!=NULL) {
704 /* Let the thread that called Start() know we're
707 ReleaseSemaphore (internal->start_notify, 1, NULL);
711 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
715 * Call this after calling start_notify, since the profiler callback might want
716 * to lock the thread, and the lock is held by thread_start () which waits for
719 mono_profiler_thread_start (tid);
721 /* if the name was set before starting, we didn't invoke the profiler callback */
722 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
723 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
724 mono_profiler_thread_name (internal->tid, tname);
727 /* start_func is set only for unmanaged start functions */
729 start_func (start_arg);
732 g_assert (start_delegate != NULL);
733 args [0] = start_arg;
734 /* we may want to handle the exception here. See comment below on unhandled exceptions */
735 mono_runtime_delegate_invoke (start_delegate, args, NULL);
738 /* If the thread calls ExitThread at all, this remaining code
739 * will not be executed, but the main thread will eventually
740 * call thread_cleanup() on this thread's behalf.
743 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
745 /* Do any cleanup needed for apartment state. This
746 * cannot be done in thread_cleanup since thread_cleanup could be
747 * called for a thread other than the current thread.
748 * mono_thread_cleanup_apartment_state cleans up apartment
749 * for the current thead */
750 mono_thread_cleanup_apartment_state ();
752 thread_cleanup (internal);
756 /* Remove the reference to the thread object in the TLS data,
757 * so the thread object can be finalized. This won't be
758 * reached if the thread threw an uncaught exception, so those
759 * thread handles will stay referenced :-( (This is due to
760 * missing support for scanning thread-specific data in the
761 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
764 SET_CURRENT_OBJECT (NULL);
769 static guint32 WINAPI start_wrapper(void *data)
773 /* Avoid scanning the frames above this frame during a GC */
774 mono_gc_set_stack_end ((void*)&dummy);
776 return start_wrapper_internal (data);
782 * Common thread creation code.
783 * LOCKING: Acquires the threads lock.
786 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
787 gboolean throw_on_failure)
789 HANDLE thread_handle;
790 MonoNativeThreadId tid;
791 guint32 create_flags;
794 * Join joinable threads to prevent running out of threads since the finalizer
795 * thread might be blocked/backlogged.
797 mono_threads_join_threads ();
799 mono_threads_lock ();
802 mono_threads_unlock ();
805 if (threads_starting_up == NULL) {
806 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
807 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
809 mono_g_hash_table_insert (threads_starting_up, thread, thread);
810 mono_threads_unlock ();
812 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
813 if (!internal->start_notify) {
814 mono_threads_lock ();
815 mono_g_hash_table_remove (threads_starting_up, thread);
816 mono_threads_unlock ();
817 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
823 stack_size = default_stacksize_for_thread (internal);
825 /* Create suspended, so we can do some housekeeping before the thread
828 create_flags = CREATE_SUSPENDED;
830 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
831 stack_size, create_flags, &tid);
833 if (thread_handle == NULL) {
834 /* The thread couldn't be created, so throw an exception */
835 mono_threads_lock ();
836 mono_g_hash_table_remove (threads_starting_up, thread);
837 mono_threads_unlock ();
839 if (throw_on_failure)
840 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
842 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
845 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
847 internal->handle = thread_handle;
848 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
850 internal->threadpool_thread = threadpool_thread;
851 if (threadpool_thread)
852 mono_thread_set_state (internal, ThreadState_Background);
854 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
856 /* Only store the handle when the thread is about to be
857 * launched, to avoid the main thread deadlocking while trying
858 * to clean up a thread that will never be signalled.
860 if (!handle_store (thread, FALSE))
863 mono_thread_info_resume (tid);
865 if (internal->start_notify) {
867 * Wait for the thread to set up its TLS data etc, so
868 * theres no potential race condition if someone tries
869 * to look up the data believing the thread has
872 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
874 MONO_PREPARE_BLOCKING;
875 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
876 MONO_FINISH_BLOCKING;
878 CloseHandle (internal->start_notify);
879 internal->start_notify = NULL;
882 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));
887 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
889 if (mono_thread_start_cb) {
890 mono_thread_start_cb (tid, stack_start, func);
894 void mono_threads_set_default_stacksize (guint32 stacksize)
896 default_stacksize = stacksize;
899 guint32 mono_threads_get_default_stacksize (void)
901 return default_stacksize;
905 * mono_thread_create_internal:
907 * ARG should not be a GC reference.
910 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
914 MonoInternalThread *internal;
915 StartInfo *start_info;
918 thread = create_thread_object (domain, &error);
919 mono_error_raise_exception (&error); /* FIXME don't raise here */
921 internal = create_internal_thread (&error);
922 mono_error_raise_exception (&error); /* FIXME don't raise here */
924 MONO_OBJECT_SETREF (thread, internal_thread, internal);
926 start_info = g_new0 (StartInfo, 1);
927 start_info->func = (guint32 (*)(void *))func;
928 start_info->obj = thread;
929 start_info->start_arg = arg;
931 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
935 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
936 #ifndef MONO_CROSS_COMPILE
937 if (mono_check_corlib_version () == NULL)
938 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
945 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
947 mono_thread_create_internal (domain, func, arg, FALSE, 0);
951 mono_thread_attach (MonoDomain *domain)
954 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
955 mono_error_raise_exception (&error);
961 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
963 MonoThreadInfo *info;
964 MonoInternalThread *thread;
965 MonoThread *current_thread;
966 HANDLE thread_handle;
967 MonoNativeThreadId tid;
969 mono_error_init (error);
971 if ((thread = mono_thread_internal_current ())) {
972 if (domain != mono_domain_get ())
973 mono_domain_set (domain, TRUE);
974 /* Already attached */
975 return mono_thread_current ();
978 if (!mono_gc_register_thread (&domain)) {
979 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 ());
982 thread = create_internal_thread (error);
983 if (!mono_error_ok (error))
986 thread_handle = mono_thread_info_open_handle ();
987 g_assert (thread_handle);
989 tid=mono_native_thread_id_get ();
991 thread->handle = thread_handle;
992 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
993 thread->stack_ptr = &tid;
995 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
997 info = mono_thread_info_current ();
999 thread->thread_info = info;
1000 thread->small_id = info->small_id;
1002 current_thread = new_thread_with_internal (domain, thread, error);
1003 if (!mono_error_ok (error))
1006 if (!handle_store (current_thread, force_attach)) {
1007 /* Mono is shutting down, so just wait for the end */
1009 mono_thread_info_sleep (10000, NULL);
1012 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1014 SET_CURRENT_OBJECT (thread);
1015 mono_domain_set (domain, TRUE);
1017 thread_adjust_static_data (thread);
1019 init_root_domain_thread (thread, current_thread);
1020 if (domain != mono_get_root_domain ())
1021 set_current_thread_for_domain (domain, thread, current_thread);
1024 if (mono_thread_attach_cb) {
1028 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1031 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1033 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1036 // FIXME: Need a separate callback
1037 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1039 return current_thread;
1043 mono_thread_detach_internal (MonoInternalThread *thread)
1045 g_return_if_fail (thread != NULL);
1047 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1049 thread_cleanup (thread);
1051 SET_CURRENT_OBJECT (NULL);
1052 mono_domain_unset ();
1054 /* Don't need to CloseHandle this thread, even though we took a
1055 * reference in mono_thread_attach (), because the GC will do it
1056 * when the Thread object is finalised.
1061 mono_thread_detach (MonoThread *thread)
1064 mono_thread_detach_internal (thread->internal_thread);
1068 * mono_thread_detach_if_exiting:
1070 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1071 * This should be used at the end of embedding code which calls into managed code, and which
1072 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1075 mono_thread_detach_if_exiting (void)
1077 if (mono_thread_info_is_exiting ()) {
1078 MonoInternalThread *thread;
1080 thread = mono_thread_internal_current ();
1082 mono_thread_detach_internal (thread);
1083 mono_thread_info_detach ();
1091 MonoInternalThread *thread = mono_thread_internal_current ();
1093 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1095 thread_cleanup (thread);
1096 SET_CURRENT_OBJECT (NULL);
1097 mono_domain_unset ();
1099 /* we could add a callback here for embedders to use. */
1100 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1101 exit (mono_environment_exitcode_get ());
1102 mono_thread_info_exit ();
1106 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1109 MonoInternalThread *internal;
1111 internal = create_internal_thread (&error);
1112 mono_error_raise_exception (&error);
1114 internal->state = ThreadState_Unstarted;
1116 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1120 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1123 StartInfo *start_info;
1124 MonoInternalThread *internal;
1127 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1129 if (!this_obj->internal_thread)
1130 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1131 internal = this_obj->internal_thread;
1133 LOCK_THREAD (internal);
1135 if ((internal->state & ThreadState_Unstarted) == 0) {
1136 UNLOCK_THREAD (internal);
1137 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1141 if ((internal->state & ThreadState_Aborted) != 0) {
1142 UNLOCK_THREAD (internal);
1145 /* This is freed in start_wrapper */
1146 start_info = g_new0 (StartInfo, 1);
1147 start_info->func = NULL;
1148 start_info->start_arg = NULL;
1149 start_info->delegate = start;
1150 start_info->obj = this_obj;
1151 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1153 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1155 UNLOCK_THREAD (internal);
1159 internal->state &= ~ThreadState_Unstarted;
1161 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1163 UNLOCK_THREAD (internal);
1164 return internal->handle;
1168 * This is called from the finalizer of the internal thread object.
1171 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1173 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1176 * Since threads keep a reference to their thread object while running, by the time this function is called,
1177 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1178 * when thread_cleanup () can be called after this.
1181 CloseHandle (thread);
1183 if (this_obj->synch_cs) {
1184 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1185 this_obj->synch_cs = NULL;
1186 mono_coop_mutex_destroy (synch_cs);
1190 if (this_obj->name) {
1191 void *name = this_obj->name;
1192 this_obj->name = NULL;
1198 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1201 MonoInternalThread *thread = mono_thread_internal_current ();
1203 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1205 mono_thread_current_check_pending_interrupt ();
1208 gboolean alerted = FALSE;
1210 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1212 res = mono_thread_info_sleep (ms, &alerted);
1214 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1217 MonoException* exc = mono_thread_execute_interruption ();
1219 mono_raise_exception (exc);
1231 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1236 ves_icall_System_Threading_Thread_GetDomainID (void)
1238 return mono_domain_get()->domain_id;
1242 ves_icall_System_Threading_Thread_Yield (void)
1244 return mono_thread_info_yield ();
1248 * mono_thread_get_name:
1250 * Return the name of the thread. NAME_LEN is set to the length of the name.
1251 * Return NULL if the thread has no name. The returned memory is owned by the
1255 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1259 LOCK_THREAD (this_obj);
1261 if (!this_obj->name) {
1265 *name_len = this_obj->name_len;
1266 res = g_new (gunichar2, this_obj->name_len);
1267 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1270 UNLOCK_THREAD (this_obj);
1276 * mono_thread_get_name_utf8:
1278 * Return the name of the thread in UTF-8.
1279 * Return NULL if the thread has no name.
1280 * The returned memory is owned by the caller.
1283 mono_thread_get_name_utf8 (MonoThread *thread)
1288 MonoInternalThread *internal = thread->internal_thread;
1289 if (internal == NULL)
1292 LOCK_THREAD (internal);
1294 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1296 UNLOCK_THREAD (internal);
1302 * mono_thread_get_managed_id:
1304 * Return the Thread.ManagedThreadId value of `thread`.
1305 * Returns -1 if `thread` is NULL.
1308 mono_thread_get_managed_id (MonoThread *thread)
1313 MonoInternalThread *internal = thread->internal_thread;
1314 if (internal == NULL)
1317 int32_t id = internal->managed_id;
1323 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1327 LOCK_THREAD (this_obj);
1329 if (!this_obj->name)
1332 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1334 UNLOCK_THREAD (this_obj);
1340 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1342 LOCK_THREAD (this_obj);
1344 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1345 UNLOCK_THREAD (this_obj);
1347 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1350 if (this_obj->name) {
1351 g_free (this_obj->name);
1352 this_obj->name_len = 0;
1355 this_obj->name = g_new (gunichar2, mono_string_length (name));
1356 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1357 this_obj->name_len = mono_string_length (name);
1360 this_obj->name = NULL;
1363 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1365 UNLOCK_THREAD (this_obj);
1367 if (this_obj->name && this_obj->tid) {
1368 char *tname = mono_string_to_utf8 (name);
1369 mono_profiler_thread_name (this_obj->tid, tname);
1370 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1376 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1378 mono_thread_set_name_internal (this_obj, name, TRUE);
1382 * ves_icall_System_Threading_Thread_GetPriority_internal:
1383 * @param this_obj: The MonoInternalThread on which to operate.
1385 * Gets the priority of the given thread.
1386 * @return: The priority of the given thread.
1389 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1392 MonoInternalThread *internal = this_obj->internal_thread;
1394 LOCK_THREAD (internal);
1395 priority = GetThreadPriority (internal->handle) + 2;
1396 UNLOCK_THREAD (internal);
1401 * ves_icall_System_Threading_Thread_SetPriority_internal:
1402 * @param this_obj: The MonoInternalThread on which to operate.
1403 * @param priority: The priority to set.
1405 * Sets the priority of the given thread.
1408 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1410 MonoInternalThread *internal = this_obj->internal_thread;
1412 LOCK_THREAD (internal);
1413 SetThreadPriority (internal->handle, priority - 2);
1414 UNLOCK_THREAD (internal);
1417 /* If the array is already in the requested domain, we just return it,
1418 otherwise we return a copy in that domain. */
1420 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1427 if (mono_object_domain (arr) == domain)
1430 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1431 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1436 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1438 return byte_array_to_domain (arr, mono_get_root_domain ());
1442 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1444 return byte_array_to_domain (arr, mono_domain_get ());
1448 mono_thread_current (void)
1451 MonoDomain *domain = mono_domain_get ();
1452 MonoInternalThread *internal = mono_thread_internal_current ();
1453 MonoThread **current_thread_ptr;
1455 g_assert (internal);
1456 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1458 if (!*current_thread_ptr) {
1459 g_assert (domain != mono_get_root_domain ());
1460 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1461 mono_error_raise_exception (&error); /* FIXME don't raise here */
1463 return *current_thread_ptr;
1466 /* Return the thread object belonging to INTERNAL in the current domain */
1468 mono_thread_current_for_thread (MonoInternalThread *internal)
1471 MonoDomain *domain = mono_domain_get ();
1472 MonoThread **current_thread_ptr;
1474 g_assert (internal);
1475 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1477 if (!*current_thread_ptr) {
1478 g_assert (domain != mono_get_root_domain ());
1479 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1480 mono_error_raise_exception (&error); /* FIXME don't raise here */
1482 return *current_thread_ptr;
1486 mono_thread_internal_current (void)
1488 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1489 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1494 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1496 MonoInternalThread *thread = this_obj->internal_thread;
1497 HANDLE handle = thread->handle;
1498 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1501 mono_thread_current_check_pending_interrupt ();
1503 LOCK_THREAD (thread);
1505 if ((thread->state & ThreadState_Unstarted) != 0) {
1506 UNLOCK_THREAD (thread);
1508 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1512 UNLOCK_THREAD (thread);
1517 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1519 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1521 MONO_PREPARE_BLOCKING;
1522 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1523 MONO_FINISH_BLOCKING;
1525 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1527 if(ret==WAIT_OBJECT_0) {
1528 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1533 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1539 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1547 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1549 MONO_PREPARE_BLOCKING;
1551 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1553 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1554 MONO_FINISH_BLOCKING;
1556 if (ret != WAIT_IO_COMPLETION)
1559 exc = mono_thread_execute_interruption ();
1561 mono_raise_exception (exc);
1566 /* Re-calculate ms according to the time passed */
1567 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1568 if (diff_ms >= ms) {
1572 wait = ms - diff_ms;
1578 /* FIXME: exitContext isnt documented */
1579 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1585 MonoObject *waitHandle;
1586 MonoInternalThread *thread = mono_thread_internal_current ();
1588 /* Do this WaitSleepJoin check before creating objects */
1589 mono_thread_current_check_pending_interrupt ();
1591 /* We fail in managed if the array has more than 64 elements */
1592 numhandles = (guint32)mono_array_length(mono_handles);
1593 handles = g_new0(HANDLE, numhandles);
1595 for(i = 0; i < numhandles; i++) {
1596 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1597 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1604 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1606 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1608 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1612 if(ret==WAIT_FAILED) {
1613 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1615 } else if(ret==WAIT_TIMEOUT) {
1616 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1623 /* FIXME: exitContext isnt documented */
1624 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1626 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1627 uintptr_t numhandles;
1630 MonoObject *waitHandle;
1631 MonoInternalThread *thread = mono_thread_internal_current ();
1633 /* Do this WaitSleepJoin check before creating objects */
1634 mono_thread_current_check_pending_interrupt ();
1636 numhandles = mono_array_length(mono_handles);
1637 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1640 for(i = 0; i < numhandles; i++) {
1641 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1642 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1649 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1651 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1653 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1655 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1658 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1660 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1661 return ret - WAIT_OBJECT_0;
1663 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1664 return ret - WAIT_ABANDONED_0;
1671 /* FIXME: exitContext isnt documented */
1672 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1675 MonoInternalThread *thread = mono_thread_internal_current ();
1677 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1683 mono_thread_current_check_pending_interrupt ();
1685 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1687 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1689 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1691 if(ret==WAIT_FAILED) {
1692 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1694 } else if(ret==WAIT_TIMEOUT) {
1695 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1703 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1706 MonoInternalThread *thread = mono_thread_internal_current ();
1711 mono_thread_current_check_pending_interrupt ();
1713 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1715 MONO_PREPARE_BLOCKING;
1716 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1717 MONO_FINISH_BLOCKING;
1719 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1721 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1724 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1731 mutex = CreateMutex (NULL, owned, NULL);
1733 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1735 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1743 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1744 return(ReleaseMutex (handle));
1747 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1753 *error = ERROR_SUCCESS;
1755 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1757 *error = GetLastError ();
1764 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1771 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1773 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1774 mono_string_chars (name));
1776 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1784 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1788 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1793 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1797 *error = ERROR_SUCCESS;
1799 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1801 *error = GetLastError ();
1807 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1814 event = CreateEvent (NULL, manual, initial, NULL);
1816 event = CreateEvent (NULL, manual, initial,
1817 mono_string_chars (name));
1819 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1827 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1828 return (SetEvent(handle));
1831 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1832 return (ResetEvent(handle));
1836 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1837 CloseHandle (handle);
1840 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1846 *error = ERROR_SUCCESS;
1848 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1850 *error = GetLastError ();
1856 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1858 return InterlockedIncrement (location);
1861 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1863 #if SIZEOF_VOID_P == 4
1864 if (G_UNLIKELY ((size_t)location & 0x7)) {
1866 mono_interlocked_lock ();
1869 mono_interlocked_unlock ();
1873 return InterlockedIncrement64 (location);
1876 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1878 return InterlockedDecrement(location);
1881 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1883 #if SIZEOF_VOID_P == 4
1884 if (G_UNLIKELY ((size_t)location & 0x7)) {
1886 mono_interlocked_lock ();
1889 mono_interlocked_unlock ();
1893 return InterlockedDecrement64 (location);
1896 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1898 return InterlockedExchange(location, value);
1901 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1904 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1905 mono_gc_wbarrier_generic_nostore (location);
1909 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1911 return InterlockedExchangePointer(location, value);
1914 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1916 IntFloatUnion val, ret;
1919 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1925 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1927 #if SIZEOF_VOID_P == 4
1928 if (G_UNLIKELY ((size_t)location & 0x7)) {
1930 mono_interlocked_lock ();
1933 mono_interlocked_unlock ();
1937 return InterlockedExchange64 (location, value);
1941 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1943 LongDoubleUnion val, ret;
1946 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1951 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1953 return InterlockedCompareExchange(location, value, comparand);
1956 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1958 gint32 r = InterlockedCompareExchange(location, value, comparand);
1959 *success = r == comparand;
1963 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1966 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1967 mono_gc_wbarrier_generic_nostore (location);
1971 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1973 return InterlockedCompareExchangePointer(location, value, comparand);
1976 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1978 IntFloatUnion val, ret, cmp;
1981 cmp.fval = comparand;
1982 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1988 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1990 #if SIZEOF_VOID_P == 8
1991 LongDoubleUnion val, comp, ret;
1994 comp.fval = comparand;
1995 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2001 mono_interlocked_lock ();
2003 if (old == comparand)
2005 mono_interlocked_unlock ();
2012 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2014 #if SIZEOF_VOID_P == 4
2015 if (G_UNLIKELY ((size_t)location & 0x7)) {
2017 mono_interlocked_lock ();
2019 if (old == comparand)
2021 mono_interlocked_unlock ();
2025 return InterlockedCompareExchange64 (location, value, comparand);
2029 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2032 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2033 mono_gc_wbarrier_generic_nostore (location);
2038 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2041 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2042 mono_gc_wbarrier_generic_nostore (location);
2047 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2049 return InterlockedAdd (location, value);
2053 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2055 #if SIZEOF_VOID_P == 4
2056 if (G_UNLIKELY ((size_t)location & 0x7)) {
2058 mono_interlocked_lock ();
2061 mono_interlocked_unlock ();
2065 return InterlockedAdd64 (location, value);
2069 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2071 #if SIZEOF_VOID_P == 4
2072 if (G_UNLIKELY ((size_t)location & 0x7)) {
2074 mono_interlocked_lock ();
2076 mono_interlocked_unlock ();
2080 return InterlockedRead64 (location);
2084 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2086 mono_memory_barrier ();
2090 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2092 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2094 if (state & ThreadState_Background) {
2095 /* If the thread changes the background mode, the main thread has to
2096 * be notified, since it has to rebuild the list of threads to
2099 SetEvent (background_change_event);
2104 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2106 mono_thread_set_state (this_obj, (MonoThreadState)state);
2108 if (state & ThreadState_Background) {
2109 /* If the thread changes the background mode, the main thread has to
2110 * be notified, since it has to rebuild the list of threads to
2113 SetEvent (background_change_event);
2118 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2122 LOCK_THREAD (this_obj);
2124 state = this_obj->state;
2126 UNLOCK_THREAD (this_obj);
2131 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2133 MonoInternalThread *current;
2135 MonoInternalThread *thread = this_obj->internal_thread;
2137 LOCK_THREAD (thread);
2139 current = mono_thread_internal_current ();
2141 thread->thread_interrupt_requested = TRUE;
2142 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2144 UNLOCK_THREAD (thread);
2147 abort_thread_internal (thread, TRUE, FALSE);
2151 void mono_thread_current_check_pending_interrupt ()
2153 MonoInternalThread *thread = mono_thread_internal_current ();
2154 gboolean throw_ = FALSE;
2156 LOCK_THREAD (thread);
2158 if (thread->thread_interrupt_requested) {
2160 thread->thread_interrupt_requested = FALSE;
2163 UNLOCK_THREAD (thread);
2166 mono_raise_exception (mono_get_exception_thread_interrupted ());
2171 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2173 LOCK_THREAD (thread);
2175 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2176 (thread->state & ThreadState_StopRequested) != 0 ||
2177 (thread->state & ThreadState_Stopped) != 0)
2179 UNLOCK_THREAD (thread);
2183 if ((thread->state & ThreadState_Unstarted) != 0) {
2184 thread->state |= ThreadState_Aborted;
2185 UNLOCK_THREAD (thread);
2189 thread->state |= ThreadState_AbortRequested;
2190 if (thread->abort_state_handle)
2191 mono_gchandle_free (thread->abort_state_handle);
2193 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2194 g_assert (thread->abort_state_handle);
2196 thread->abort_state_handle = 0;
2198 thread->abort_exc = NULL;
2200 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));
2202 /* During shutdown, we can't wait for other threads */
2204 /* Make sure the thread is awake */
2205 mono_thread_resume (thread);
2207 UNLOCK_THREAD (thread);
2209 abort_thread_internal (thread, TRUE, TRUE);
2213 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2215 MonoInternalThread *thread = mono_thread_internal_current ();
2216 gboolean was_aborting;
2218 LOCK_THREAD (thread);
2219 was_aborting = thread->state & ThreadState_AbortRequested;
2220 thread->state &= ~ThreadState_AbortRequested;
2221 UNLOCK_THREAD (thread);
2223 if (!was_aborting) {
2224 const char *msg = "Unable to reset abort because no abort was requested";
2225 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2228 thread->abort_exc = NULL;
2229 if (thread->abort_state_handle) {
2230 mono_gchandle_free (thread->abort_state_handle);
2231 /* This is actually not necessary - the handle
2232 only counts if the exception is set */
2233 thread->abort_state_handle = 0;
2238 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2240 LOCK_THREAD (thread);
2242 thread->state &= ~ThreadState_AbortRequested;
2244 if (thread->abort_exc) {
2245 thread->abort_exc = NULL;
2246 if (thread->abort_state_handle) {
2247 mono_gchandle_free (thread->abort_state_handle);
2248 /* This is actually not necessary - the handle
2249 only counts if the exception is set */
2250 thread->abort_state_handle = 0;
2254 UNLOCK_THREAD (thread);
2258 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2260 MonoInternalThread *thread = this_obj->internal_thread;
2261 MonoObject *state, *deserialized = NULL, *exc;
2264 if (!thread->abort_state_handle)
2267 state = mono_gchandle_get_target (thread->abort_state_handle);
2270 domain = mono_domain_get ();
2271 if (mono_object_domain (state) == domain)
2274 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2276 if (!deserialized) {
2277 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2279 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2280 mono_set_pending_exception (invalid_op_exc);
2284 return deserialized;
2288 mono_thread_suspend (MonoInternalThread *thread)
2290 LOCK_THREAD (thread);
2292 if ((thread->state & ThreadState_Unstarted) != 0 ||
2293 (thread->state & ThreadState_Aborted) != 0 ||
2294 (thread->state & ThreadState_Stopped) != 0)
2296 UNLOCK_THREAD (thread);
2300 if ((thread->state & ThreadState_Suspended) != 0 ||
2301 (thread->state & ThreadState_SuspendRequested) != 0 ||
2302 (thread->state & ThreadState_StopRequested) != 0)
2304 UNLOCK_THREAD (thread);
2308 thread->state |= ThreadState_SuspendRequested;
2309 suspend_thread_internal (thread, FALSE);
2314 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2316 if (!mono_thread_suspend (this_obj->internal_thread)) {
2317 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2322 /* LOCKING: LOCK_THREAD(thread) must be held */
2324 mono_thread_resume (MonoInternalThread *thread)
2326 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2327 thread->state &= ~ThreadState_SuspendRequested;
2331 if ((thread->state & ThreadState_Suspended) == 0 ||
2332 (thread->state & ThreadState_Unstarted) != 0 ||
2333 (thread->state & ThreadState_Aborted) != 0 ||
2334 (thread->state & ThreadState_Stopped) != 0)
2339 UNLOCK_THREAD (thread);
2341 /* Awake the thread */
2342 if (!mono_thread_info_resume (thread_get_tid (thread)))
2345 LOCK_THREAD (thread);
2347 thread->state &= ~ThreadState_Suspended;
2353 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2355 if (!thread->internal_thread) {
2356 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2358 LOCK_THREAD (thread->internal_thread);
2359 if (!mono_thread_resume (thread->internal_thread))
2360 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2361 UNLOCK_THREAD (thread->internal_thread);
2366 mono_threads_is_critical_method (MonoMethod *method)
2368 switch (method->wrapper_type) {
2369 case MONO_WRAPPER_RUNTIME_INVOKE:
2370 case MONO_WRAPPER_XDOMAIN_INVOKE:
2371 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2378 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2383 if (mono_threads_is_critical_method (m)) {
2384 *((gboolean*)data) = TRUE;
2391 is_running_protected_wrapper (void)
2393 gboolean found = FALSE;
2394 mono_stack_walk (find_wrapper, &found);
2398 void mono_thread_internal_stop (MonoInternalThread *thread)
2400 LOCK_THREAD (thread);
2402 if ((thread->state & ThreadState_StopRequested) != 0 ||
2403 (thread->state & ThreadState_Stopped) != 0)
2405 UNLOCK_THREAD (thread);
2409 /* Make sure the thread is awake */
2410 mono_thread_resume (thread);
2412 thread->state |= ThreadState_StopRequested;
2413 thread->state &= ~ThreadState_AbortRequested;
2415 UNLOCK_THREAD (thread);
2417 abort_thread_internal (thread, TRUE, TRUE);
2420 void mono_thread_stop (MonoThread *thread)
2422 mono_thread_internal_stop (thread->internal_thread);
2426 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2428 gint8 tmp = *(volatile gint8 *)ptr;
2429 mono_memory_barrier ();
2434 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2436 gint16 tmp = *(volatile gint16 *)ptr;
2437 mono_memory_barrier ();
2442 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2444 gint32 tmp = *(volatile gint32 *)ptr;
2445 mono_memory_barrier ();
2450 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2452 gint64 tmp = *(volatile gint64 *)ptr;
2453 mono_memory_barrier ();
2458 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2460 volatile void *tmp = *(volatile void **)ptr;
2461 mono_memory_barrier ();
2462 return (void *) tmp;
2466 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2468 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2469 mono_memory_barrier ();
2470 return (MonoObject *) tmp;
2474 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2476 double tmp = *(volatile double *)ptr;
2477 mono_memory_barrier ();
2482 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2484 float tmp = *(volatile float *)ptr;
2485 mono_memory_barrier ();
2490 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2492 return InterlockedRead8 ((volatile gint8 *)ptr);
2496 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2498 return InterlockedRead16 ((volatile gint16 *)ptr);
2502 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2504 return InterlockedRead ((volatile gint32 *)ptr);
2508 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2510 #if SIZEOF_VOID_P == 4
2511 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2513 mono_interlocked_lock ();
2514 val = *(gint64*)ptr;
2515 mono_interlocked_unlock ();
2519 return InterlockedRead64 ((volatile gint64 *)ptr);
2523 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2525 return InterlockedReadPointer ((volatile gpointer *)ptr);
2529 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2533 #if SIZEOF_VOID_P == 4
2534 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2536 mono_interlocked_lock ();
2537 val = *(double*)ptr;
2538 mono_interlocked_unlock ();
2543 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2549 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2553 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2559 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2561 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2565 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2567 mono_memory_barrier ();
2568 *(volatile gint8 *)ptr = value;
2572 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2574 mono_memory_barrier ();
2575 *(volatile gint16 *)ptr = value;
2579 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2581 mono_memory_barrier ();
2582 *(volatile gint32 *)ptr = value;
2586 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2588 mono_memory_barrier ();
2589 *(volatile gint64 *)ptr = value;
2593 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2595 mono_memory_barrier ();
2596 *(volatile void **)ptr = value;
2600 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2602 mono_memory_barrier ();
2603 mono_gc_wbarrier_generic_store (ptr, value);
2607 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2609 mono_memory_barrier ();
2610 *(volatile double *)ptr = value;
2614 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2616 mono_memory_barrier ();
2617 *(volatile float *)ptr = value;
2621 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2623 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2627 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2629 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2633 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2635 InterlockedWrite ((volatile gint32 *)ptr, value);
2639 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2641 #if SIZEOF_VOID_P == 4
2642 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2643 mono_interlocked_lock ();
2644 *(gint64*)ptr = value;
2645 mono_interlocked_unlock ();
2650 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2654 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2656 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2660 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2664 #if SIZEOF_VOID_P == 4
2665 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2666 mono_interlocked_lock ();
2667 *(double*)ptr = value;
2668 mono_interlocked_unlock ();
2675 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2679 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2685 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2689 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2691 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2695 free_context (void *user_data)
2697 ContextStaticData *data = user_data;
2699 mono_threads_lock ();
2702 * There is no guarantee that, by the point this reference queue callback
2703 * has been invoked, the GC handle associated with the object will fail to
2704 * resolve as one might expect. So if we don't free and remove the GC
2705 * handle here, free_context_static_data_helper () could end up resolving
2706 * a GC handle to an actually-dead context which would contain a pointer
2707 * to an already-freed static data segment, resulting in a crash when
2710 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2712 mono_threads_unlock ();
2714 mono_gchandle_free (data->gc_handle);
2715 mono_free_static_data (data->static_data);
2720 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2722 mono_threads_lock ();
2724 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2727 contexts = g_hash_table_new (NULL, NULL);
2730 context_queue = mono_gc_reference_queue_new (free_context);
2732 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2733 g_hash_table_insert (contexts, gch, gch);
2736 * We use this intermediate structure to contain a duplicate pointer to
2737 * the static data because we can't rely on being able to resolve the GC
2738 * handle in the reference queue callback.
2740 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2741 data->gc_handle = GPOINTER_TO_UINT (gch);
2744 context_adjust_static_data (ctx);
2745 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2747 mono_threads_unlock ();
2749 mono_profiler_context_loaded (ctx);
2753 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2756 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2757 * cleanup in exceptional circumstances, we don't actually do any
2758 * cleanup work here. We instead do this via a reference queue.
2761 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2763 mono_profiler_context_unloaded (ctx);
2767 mono_thread_init_tls (void)
2769 MONO_FAST_TLS_INIT (tls_current_object);
2770 mono_native_tls_alloc (¤t_object_key, NULL);
2773 void mono_thread_init (MonoThreadStartCB start_cb,
2774 MonoThreadAttachCB attach_cb)
2776 mono_coop_mutex_init_recursive (&threads_mutex);
2778 mono_os_mutex_init_recursive(&interlocked_mutex);
2779 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2781 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2782 g_assert(background_change_event != NULL);
2784 mono_init_static_data_info (&thread_static_info);
2785 mono_init_static_data_info (&context_static_info);
2787 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2789 mono_thread_start_cb = start_cb;
2790 mono_thread_attach_cb = attach_cb;
2792 /* Get a pseudo handle to the current process. This is just a
2793 * kludge so that wapi can build a process handle if needed.
2794 * As a pseudo handle is returned, we don't need to clean
2797 GetCurrentProcess ();
2800 void mono_thread_cleanup (void)
2802 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2803 MonoThreadInfo *info;
2805 /* The main thread must abandon any held mutexes (particularly
2806 * important for named mutexes as they are shared across
2807 * processes, see bug 74680.) This will happen when the
2808 * thread exits, but if it's not running in a subthread it
2809 * won't exit in time.
2811 info = mono_thread_info_current ();
2812 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2816 /* This stuff needs more testing, it seems one of these
2817 * critical sections can be locked when mono_thread_cleanup is
2820 mono_coop_mutex_destroy (&threads_mutex);
2821 mono_os_mutex_destroy (&interlocked_mutex);
2822 mono_os_mutex_destroy (&delayed_free_table_mutex);
2823 mono_os_mutex_destroy (&small_id_mutex);
2824 CloseHandle (background_change_event);
2827 mono_native_tls_free (current_object_key);
2831 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2833 mono_thread_cleanup_fn = func;
2837 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2839 thread->internal_thread->manage_callback = func;
2842 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2844 mono_thread_notify_pending_exc_fn = func;
2848 static void print_tids (gpointer key, gpointer value, gpointer user)
2850 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2851 * sizeof(uint) and a cast to uint would overflow
2853 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2854 * print this as a pointer.
2856 g_message ("Waiting for: %p", key);
2861 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2862 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2866 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2870 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2872 MONO_PREPARE_BLOCKING;
2873 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2874 MONO_FINISH_BLOCKING;
2876 if(ret==WAIT_FAILED) {
2877 /* See the comment in build_wait_tids() */
2878 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2882 for(i=0; i<wait->num; i++)
2883 CloseHandle (wait->handles[i]);
2885 if (ret == WAIT_TIMEOUT)
2888 for(i=0; i<wait->num; i++) {
2889 gsize tid = wait->threads[i]->tid;
2892 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2893 * it can still run io-layer etc. code. So wait for it to really exit.
2894 * FIXME: This won't join threads which are not in the joinable_hash yet.
2896 mono_thread_join ((gpointer)tid);
2898 mono_threads_lock ();
2899 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2900 /* This thread must have been killed, because
2901 * it hasn't cleaned itself up. (It's just
2902 * possible that the thread exited before the
2903 * parent thread had a chance to store the
2904 * handle, and now there is another pointer to
2905 * the already-exited thread stored. In this
2906 * case, we'll just get two
2907 * mono_profiler_thread_end() calls for the
2911 mono_threads_unlock ();
2912 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2913 thread_cleanup (wait->threads[i]);
2915 mono_threads_unlock ();
2920 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2922 guint32 i, ret, count;
2924 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2926 /* Add the thread state change event, so it wakes up if a thread changes
2927 * to background mode.
2930 if (count < MAXIMUM_WAIT_OBJECTS) {
2931 wait->handles [count] = background_change_event;
2935 MONO_PREPARE_BLOCKING;
2936 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2937 MONO_FINISH_BLOCKING;
2939 if(ret==WAIT_FAILED) {
2940 /* See the comment in build_wait_tids() */
2941 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2945 for(i=0; i<wait->num; i++)
2946 CloseHandle (wait->handles[i]);
2948 if (ret == WAIT_TIMEOUT)
2951 if (ret < wait->num) {
2952 gsize tid = wait->threads[ret]->tid;
2953 mono_threads_lock ();
2954 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2955 /* See comment in wait_for_tids about thread cleanup */
2956 mono_threads_unlock ();
2957 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2958 thread_cleanup (wait->threads [ret]);
2960 mono_threads_unlock ();
2964 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2966 struct wait_data *wait=(struct wait_data *)user;
2968 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2970 MonoInternalThread *thread=(MonoInternalThread *)value;
2972 /* Ignore background threads, we abort them later */
2973 /* Do not lock here since it is not needed and the caller holds threads_lock */
2974 if (thread->state & ThreadState_Background) {
2975 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2976 return; /* just leave, ignore */
2979 if (mono_gc_is_finalizer_internal_thread (thread)) {
2980 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2984 if (thread == mono_thread_internal_current ()) {
2985 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2989 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2990 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2994 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2995 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2999 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3000 if (handle == NULL) {
3001 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3005 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3006 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3007 wait->handles[wait->num]=handle;
3008 wait->threads[wait->num]=thread;
3011 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3013 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3018 /* Just ignore the rest, we can't do anything with
3025 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3027 struct wait_data *wait=(struct wait_data *)user;
3028 MonoNativeThreadId self = mono_native_thread_id_get ();
3029 MonoInternalThread *thread = (MonoInternalThread *)value;
3032 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3035 /* The finalizer thread is not a background thread */
3036 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3037 && (thread->state & ThreadState_Background) != 0
3038 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3040 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3044 /* printf ("A: %d\n", wait->num); */
3045 wait->handles[wait->num]=thread->handle;
3046 wait->threads[wait->num]=thread;
3049 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3050 mono_thread_internal_stop (thread);
3054 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3055 && !mono_gc_is_finalizer_internal_thread (thread);
3059 * mono_threads_set_shutting_down:
3061 * Is called by a thread that wants to shut down Mono. If the runtime is already
3062 * shutting down, the calling thread is suspended/stopped, and this function never
3066 mono_threads_set_shutting_down (void)
3068 MonoInternalThread *current_thread = mono_thread_internal_current ();
3070 mono_threads_lock ();
3072 if (shutting_down) {
3073 mono_threads_unlock ();
3075 /* Make sure we're properly suspended/stopped */
3077 LOCK_THREAD (current_thread);
3079 if ((current_thread->state & ThreadState_SuspendRequested) ||
3080 (current_thread->state & ThreadState_AbortRequested) ||
3081 (current_thread->state & ThreadState_StopRequested)) {
3082 UNLOCK_THREAD (current_thread);
3083 mono_thread_execute_interruption ();
3085 current_thread->state |= ThreadState_Stopped;
3086 UNLOCK_THREAD (current_thread);
3089 /*since we're killing the thread, unset the current domain.*/
3090 mono_domain_unset ();
3092 /* Wake up other threads potentially waiting for us */
3093 mono_thread_info_exit ();
3095 shutting_down = TRUE;
3097 /* Not really a background state change, but this will
3098 * interrupt the main thread if it is waiting for all
3099 * the other threads.
3101 SetEvent (background_change_event);
3103 mono_threads_unlock ();
3107 void mono_thread_manage (void)
3109 struct wait_data wait_data;
3110 struct wait_data *wait = &wait_data;
3112 memset (wait, 0, sizeof (struct wait_data));
3113 /* join each thread that's still running */
3114 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3116 mono_threads_lock ();
3118 THREAD_DEBUG (g_message("%s: No threads", __func__));
3119 mono_threads_unlock ();
3122 mono_threads_unlock ();
3125 mono_threads_lock ();
3126 if (shutting_down) {
3127 /* somebody else is shutting down */
3128 mono_threads_unlock ();
3131 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3132 mono_g_hash_table_foreach (threads, print_tids, NULL));
3134 ResetEvent (background_change_event);
3136 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3137 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3138 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3139 mono_threads_unlock ();
3141 /* Something to wait for */
3142 wait_for_tids_or_state_change (wait, INFINITE);
3144 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3145 } while(wait->num>0);
3147 /* Mono is shutting down, so just wait for the end */
3148 if (!mono_runtime_try_shutdown ()) {
3149 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3150 mono_thread_suspend (mono_thread_internal_current ());
3151 mono_thread_execute_interruption ();
3155 * Remove everything but the finalizer thread and self.
3156 * Also abort all the background threads
3159 mono_threads_lock ();
3162 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3163 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3164 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3166 mono_threads_unlock ();
3168 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3170 /* Something to wait for */
3171 wait_for_tids (wait, INFINITE);
3173 } while (wait->num > 0);
3176 * give the subthreads a chance to really quit (this is mainly needed
3177 * to get correct user and system times from getrusage/wait/time(1)).
3178 * This could be removed if we avoid pthread_detach() and use pthread_join().
3180 mono_thread_info_yield ();
3184 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3186 MonoInternalThread *thread = (MonoInternalThread*)value;
3187 struct wait_data *wait = (struct wait_data*)user_data;
3191 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3193 * This needs no locking.
3195 if ((thread->state & ThreadState_Suspended) != 0 ||
3196 (thread->state & ThreadState_Stopped) != 0)
3199 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3200 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3204 wait->handles [wait->num] = handle;
3205 wait->threads [wait->num] = thread;
3211 * mono_thread_suspend_all_other_threads:
3213 * Suspend all managed threads except the finalizer thread and this thread. It is
3214 * not possible to resume them later.
3216 void mono_thread_suspend_all_other_threads (void)
3218 struct wait_data wait_data;
3219 struct wait_data *wait = &wait_data;
3221 MonoNativeThreadId self = mono_native_thread_id_get ();
3222 guint32 eventidx = 0;
3223 gboolean starting, finished;
3225 memset (wait, 0, sizeof (struct wait_data));
3227 * The other threads could be in an arbitrary state at this point, i.e.
3228 * they could be starting up, shutting down etc. This means that there could be
3229 * threads which are not even in the threads hash table yet.
3233 * First we set a barrier which will be checked by all threads before they
3234 * are added to the threads hash table, and they will exit if the flag is set.
3235 * This ensures that no threads could be added to the hash later.
3236 * We will use shutting_down as the barrier for now.
3238 g_assert (shutting_down);
3241 * We make multiple calls to WaitForMultipleObjects since:
3242 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3243 * - some threads could exit without becoming suspended
3248 * Make a copy of the hashtable since we can't do anything with
3249 * threads while threads_mutex is held.
3252 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3253 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3254 mono_threads_lock ();
3255 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3256 mono_threads_unlock ();
3259 /* Get the suspended events that we'll be waiting for */
3260 for (i = 0; i < wait->num; ++i) {
3261 MonoInternalThread *thread = wait->threads [i];
3263 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3264 || mono_gc_is_finalizer_internal_thread (thread)
3265 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3267 //CloseHandle (wait->handles [i]);
3268 wait->threads [i] = NULL; /* ignore this thread in next loop */
3272 LOCK_THREAD (thread);
3274 if ((thread->state & ThreadState_Suspended) != 0 ||
3275 (thread->state & ThreadState_StopRequested) != 0 ||
3276 (thread->state & ThreadState_Stopped) != 0) {
3277 UNLOCK_THREAD (thread);
3278 CloseHandle (wait->handles [i]);
3279 wait->threads [i] = NULL; /* ignore this thread in next loop */
3285 /* Convert abort requests into suspend requests */
3286 if ((thread->state & ThreadState_AbortRequested) != 0)
3287 thread->state &= ~ThreadState_AbortRequested;
3289 thread->state |= ThreadState_SuspendRequested;
3290 /* Signal the thread to suspend */
3291 suspend_thread_internal (thread, TRUE);
3293 if (eventidx <= 0) {
3295 * If there are threads which are starting up, we wait until they
3296 * are suspended when they try to register in the threads hash.
3297 * This is guaranteed to finish, since the threads which can create new
3298 * threads get suspended after a while.
3299 * FIXME: The finalizer thread can still create new threads.
3301 mono_threads_lock ();
3302 if (threads_starting_up)
3303 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3306 mono_threads_unlock ();
3308 mono_thread_info_sleep (100, NULL);
3316 MonoInternalThread *thread;
3317 MonoStackFrameInfo *frames;
3318 int nframes, max_frames;
3319 int nthreads, max_threads;
3320 MonoInternalThread **threads;
3321 } ThreadDumpUserData;
3323 static gboolean thread_dump_requested;
3325 /* This needs to be async safe */
3327 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3329 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3331 if (ud->nframes < ud->max_frames) {
3332 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3339 /* This needs to be async safe */
3340 static SuspendThreadResult
3341 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3343 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3344 MonoInternalThread *thread = user_data->thread;
3347 /* This no longer works with remote unwinding */
3349 wapi_desc = wapi_current_thread_desc ();
3350 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3355 if (thread == mono_thread_internal_current ())
3356 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3358 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3360 return MonoResumeThread;
3364 int nthreads, max_threads;
3365 MonoInternalThread **threads;
3366 } CollectThreadsUserData;
3369 collect_thread (gpointer key, gpointer value, gpointer user)
3371 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3372 MonoInternalThread *thread = (MonoInternalThread *)value;
3374 if (ud->nthreads < ud->max_threads)
3375 ud->threads [ud->nthreads ++] = thread;
3379 * Collect running threads into the THREADS array.
3380 * THREADS should be an array allocated on the stack.
3383 collect_threads (MonoInternalThread **thread_array, int max_threads)
3385 CollectThreadsUserData ud;
3387 memset (&ud, 0, sizeof (ud));
3388 /* This array contains refs, but its on the stack, so its ok */
3389 ud.threads = thread_array;
3390 ud.max_threads = max_threads;
3392 mono_threads_lock ();
3393 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3394 mono_threads_unlock ();
3400 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3402 GString* text = g_string_new (0);
3404 GError *error = NULL;
3407 ud->thread = thread;
3410 /* Collect frames for the thread */
3411 if (thread == mono_thread_internal_current ()) {
3412 get_thread_dump (mono_thread_info_current (), ud);
3414 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3418 * Do all the non async-safe work outside of get_thread_dump.
3421 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3423 g_string_append_printf (text, "\n\"%s\"", name);
3426 else if (thread->threadpool_thread) {
3427 g_string_append (text, "\n\"<threadpool thread>\"");
3429 g_string_append (text, "\n\"<unnamed thread>\"");
3432 for (i = 0; i < ud->nframes; ++i) {
3433 MonoStackFrameInfo *frame = &ud->frames [i];
3434 MonoMethod *method = NULL;
3436 if (frame->type == FRAME_TYPE_MANAGED)
3437 method = mono_jit_info_get_method (frame->ji);
3440 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3441 g_string_append_printf (text, " %s\n", location);
3444 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3448 fprintf (stdout, "%s", text->str);
3450 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3451 OutputDebugStringA(text->str);
3454 g_string_free (text, TRUE);
3459 mono_threads_perform_thread_dump (void)
3461 ThreadDumpUserData ud;
3462 MonoInternalThread *thread_array [128];
3463 int tindex, nthreads;
3465 if (!thread_dump_requested)
3468 printf ("Full thread dump:\n");
3470 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3471 nthreads = collect_threads (thread_array, 128);
3473 memset (&ud, 0, sizeof (ud));
3474 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3475 ud.max_frames = 256;
3477 for (tindex = 0; tindex < nthreads; ++tindex)
3478 dump_thread (thread_array [tindex], &ud);
3482 thread_dump_requested = FALSE;
3485 /* Obtain the thread dump of all threads */
3487 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3489 ThreadDumpUserData ud;
3490 MonoInternalThread *thread_array [128];
3491 MonoDomain *domain = mono_domain_get ();
3492 MonoDebugSourceLocation *location;
3493 int tindex, nthreads;
3495 *out_threads = NULL;
3496 *out_stack_frames = NULL;
3498 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3499 nthreads = collect_threads (thread_array, 128);
3501 memset (&ud, 0, sizeof (ud));
3502 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3503 ud.max_frames = 256;
3505 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3506 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3508 for (tindex = 0; tindex < nthreads; ++tindex) {
3509 MonoInternalThread *thread = thread_array [tindex];
3510 MonoArray *thread_frames;
3516 /* Collect frames for the thread */
3517 if (thread == mono_thread_internal_current ()) {
3518 get_thread_dump (mono_thread_info_current (), &ud);
3520 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3523 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3525 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3526 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3528 for (i = 0; i < ud.nframes; ++i) {
3529 MonoStackFrameInfo *frame = &ud.frames [i];
3530 MonoMethod *method = NULL;
3531 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
3533 sf->native_offset = frame->native_offset;
3535 if (frame->type == FRAME_TYPE_MANAGED)
3536 method = mono_jit_info_get_method (frame->ji);
3539 sf->method_address = (gsize) frame->ji->code_start;
3541 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3543 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3545 sf->il_offset = location->il_offset;
3547 if (location && location->source_file) {
3548 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3549 sf->line = location->row;
3550 sf->column = location->column;
3552 mono_debug_free_source_location (location);
3557 mono_array_setref (thread_frames, i, sf);
3565 * mono_threads_request_thread_dump:
3567 * Ask all threads except the current to print their stacktrace to stdout.
3570 mono_threads_request_thread_dump (void)
3572 /*The new thread dump code runs out of the finalizer thread. */
3573 thread_dump_requested = TRUE;
3574 mono_gc_finalize_notify ();
3579 gint allocated; /* +1 so that refs [allocated] == NULL */
3583 typedef struct ref_stack RefStack;
3586 ref_stack_new (gint initial_size)
3590 initial_size = MAX (initial_size, 16) + 1;
3591 rs = g_new0 (RefStack, 1);
3592 rs->refs = g_new0 (gpointer, initial_size);
3593 rs->allocated = initial_size;
3598 ref_stack_destroy (gpointer ptr)
3600 RefStack *rs = (RefStack *)ptr;
3609 ref_stack_push (RefStack *rs, gpointer ptr)
3611 g_assert (rs != NULL);
3613 if (rs->bottom >= rs->allocated) {
3614 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3615 rs->allocated <<= 1;
3616 rs->refs [rs->allocated] = NULL;
3618 rs->refs [rs->bottom++] = ptr;
3622 ref_stack_pop (RefStack *rs)
3624 if (rs == NULL || rs->bottom == 0)
3628 rs->refs [rs->bottom] = NULL;
3632 ref_stack_find (RefStack *rs, gpointer ptr)
3639 for (refs = rs->refs; refs && *refs; refs++) {
3647 * mono_thread_push_appdomain_ref:
3649 * Register that the current thread may have references to objects in domain
3650 * @domain on its stack. Each call to this function should be paired with a
3651 * call to pop_appdomain_ref.
3654 mono_thread_push_appdomain_ref (MonoDomain *domain)
3656 MonoInternalThread *thread = mono_thread_internal_current ();
3659 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3660 SPIN_LOCK (thread->lock_thread_id);
3661 if (thread->appdomain_refs == NULL)
3662 thread->appdomain_refs = ref_stack_new (16);
3663 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3664 SPIN_UNLOCK (thread->lock_thread_id);
3669 mono_thread_pop_appdomain_ref (void)
3671 MonoInternalThread *thread = mono_thread_internal_current ();
3674 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3675 SPIN_LOCK (thread->lock_thread_id);
3676 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3677 SPIN_UNLOCK (thread->lock_thread_id);
3682 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3685 SPIN_LOCK (thread->lock_thread_id);
3686 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3687 SPIN_UNLOCK (thread->lock_thread_id);
3692 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3694 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3697 typedef struct abort_appdomain_data {
3698 struct wait_data wait;
3700 } abort_appdomain_data;
3703 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3705 MonoInternalThread *thread = (MonoInternalThread*)value;
3706 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3707 MonoDomain *domain = data->domain;
3709 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3710 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3712 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3713 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3716 data->wait.handles [data->wait.num] = handle;
3717 data->wait.threads [data->wait.num] = thread;
3720 /* Just ignore the rest, we can't do anything with
3728 * mono_threads_abort_appdomain_threads:
3730 * Abort threads which has references to the given appdomain.
3733 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3735 #ifdef __native_client__
3739 abort_appdomain_data user_data;
3741 int orig_timeout = timeout;
3744 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3746 start_time = mono_msec_ticks ();
3748 mono_threads_lock ();
3750 user_data.domain = domain;
3751 user_data.wait.num = 0;
3752 /* This shouldn't take any locks */
3753 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3754 mono_threads_unlock ();
3756 if (user_data.wait.num > 0) {
3757 /* Abort the threads outside the threads lock */
3758 for (i = 0; i < user_data.wait.num; ++i)
3759 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3762 * We should wait for the threads either to abort, or to leave the
3763 * domain. We can't do the latter, so we wait with a timeout.
3765 wait_for_tids (&user_data.wait, 100);
3768 /* Update remaining time */
3769 timeout -= mono_msec_ticks () - start_time;
3770 start_time = mono_msec_ticks ();
3772 if (orig_timeout != -1 && timeout < 0)
3775 while (user_data.wait.num > 0);
3777 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3783 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3785 MonoInternalThread *thread = (MonoInternalThread*)value;
3786 MonoDomain *domain = (MonoDomain*)user_data;
3789 /* No locking needed here */
3790 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3792 if (thread->cached_culture_info) {
3793 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3794 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3795 if (obj && obj->vtable->domain == domain)
3796 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3802 * mono_threads_clear_cached_culture:
3804 * Clear the cached_current_culture from all threads if it is in the
3808 mono_threads_clear_cached_culture (MonoDomain *domain)
3810 mono_threads_lock ();
3811 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3812 mono_threads_unlock ();
3816 * mono_thread_get_undeniable_exception:
3818 * Return an exception which needs to be raised when leaving a catch clause.
3819 * This is used for undeniable exception propagation.
3822 mono_thread_get_undeniable_exception (void)
3824 MonoInternalThread *thread = mono_thread_internal_current ();
3826 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3828 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3829 * exception if the thread no longer references a dying appdomain.
3831 thread->abort_exc->trace_ips = NULL;
3832 thread->abort_exc->stack_trace = NULL;
3833 return thread->abort_exc;
3839 #if MONO_SMALL_CONFIG
3840 #define NUM_STATIC_DATA_IDX 4
3841 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3845 #define NUM_STATIC_DATA_IDX 8
3846 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3847 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3851 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3852 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3855 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3857 gpointer *static_data = (gpointer *)addr;
3859 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3860 void **ptr = (void **)static_data [i];
3865 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3866 void **p = ptr + idx;
3869 mark_func ((MonoObject**)p, gc_data);
3875 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3877 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3881 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3883 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3887 * mono_alloc_static_data
3889 * Allocate memory blocks for storing threads or context static data
3892 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3894 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3897 gpointer* static_data = *static_data_ptr;
3899 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3900 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3902 if (mono_gc_user_markers_supported ()) {
3903 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3904 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3906 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3907 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3910 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3911 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3912 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3913 *static_data_ptr = static_data;
3914 static_data [0] = static_data;
3917 for (i = 1; i <= idx; ++i) {
3918 if (static_data [i])
3921 if (mono_gc_user_markers_supported ())
3922 static_data [i] = g_malloc0 (static_data_size [i]);
3924 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3925 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3926 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3931 mono_free_static_data (gpointer* static_data)
3934 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3935 gpointer p = static_data [i];
3939 * At this point, the static data pointer array is still registered with the
3940 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3941 * data. Freeing the individual arrays without first nulling their slots
3942 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3943 * such an already freed array. See bug #13813.
3945 static_data [i] = NULL;
3946 mono_memory_write_barrier ();
3947 if (mono_gc_user_markers_supported ())
3950 mono_gc_free_fixed (p);
3952 mono_gc_free_fixed (static_data);
3956 * mono_init_static_data_info
3958 * Initializes static data counters
3960 static void mono_init_static_data_info (StaticDataInfo *static_data)
3962 static_data->idx = 0;
3963 static_data->offset = 0;
3964 static_data->freelist = NULL;
3968 * mono_alloc_static_data_slot
3970 * Generates an offset for static data. static_data contains the counters
3971 * used to generate it.
3974 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3976 if (!static_data->idx && !static_data->offset) {
3978 * we use the first chunk of the first allocation also as
3979 * an array for the rest of the data
3981 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3983 static_data->offset += align - 1;
3984 static_data->offset &= ~(align - 1);
3985 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3986 static_data->idx ++;
3987 g_assert (size <= static_data_size [static_data->idx]);
3988 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3989 static_data->offset = 0;
3991 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
3992 static_data->offset += size;
3997 * ensure thread static fields already allocated are valid for thread
3998 * This function is called when a thread is created or on thread attach.
4001 thread_adjust_static_data (MonoInternalThread *thread)
4003 mono_threads_lock ();
4004 if (thread_static_info.offset || thread_static_info.idx > 0) {
4005 /* get the current allocated size */
4006 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4007 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4009 mono_threads_unlock ();
4013 * LOCKING: requires that threads_mutex is held
4016 context_adjust_static_data (MonoAppContext *ctx)
4018 if (context_static_info.offset || context_static_info.idx > 0) {
4019 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4020 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4021 ctx->data->static_data = ctx->static_data;
4026 * LOCKING: requires that threads_mutex is held
4029 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4031 MonoInternalThread *thread = (MonoInternalThread *)value;
4032 guint32 offset = GPOINTER_TO_UINT (user);
4034 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4038 * LOCKING: requires that threads_mutex is held
4041 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4043 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4048 guint32 offset = GPOINTER_TO_UINT (user);
4049 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4050 ctx->data->static_data = ctx->static_data;
4053 static StaticDataFreeList*
4054 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4056 StaticDataFreeList* prev = NULL;
4057 StaticDataFreeList* tmp = static_data->freelist;
4059 if (tmp->size == size) {
4061 prev->next = tmp->next;
4063 static_data->freelist = tmp->next;
4072 #if SIZEOF_VOID_P == 4
4079 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4081 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4083 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4084 MonoBitSet *rb = sets [idx];
4085 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4086 offset /= sizeof (uintptr_t);
4087 /* offset is now the bitmap offset */
4088 for (int i = 0; i < numbits; ++i) {
4089 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4090 mono_bitset_set_fast (rb, offset + i);
4095 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4097 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4098 MonoBitSet *rb = sets [idx];
4099 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4100 offset /= sizeof (uintptr_t);
4101 /* offset is now the bitmap offset */
4102 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4103 mono_bitset_clear_fast (rb, offset + i);
4107 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4109 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4111 StaticDataInfo *info;
4114 if (static_type == SPECIAL_STATIC_THREAD) {
4115 info = &thread_static_info;
4116 sets = thread_reference_bitmaps;
4118 info = &context_static_info;
4119 sets = context_reference_bitmaps;
4122 mono_threads_lock ();
4124 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4128 offset = item->offset;
4131 offset = mono_alloc_static_data_slot (info, size, align);
4134 update_reference_bitmap (sets, offset, bitmap, numbits);
4136 if (static_type == SPECIAL_STATIC_THREAD) {
4137 /* This can be called during startup */
4138 if (threads != NULL)
4139 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4141 if (contexts != NULL)
4142 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4144 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4147 mono_threads_unlock ();
4153 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4155 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4157 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4158 return get_thread_static_data (thread, offset);
4160 return get_context_static_data (thread->current_appcontext, offset);
4165 mono_get_special_static_data (guint32 offset)
4167 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4176 * LOCKING: requires that threads_mutex is held
4179 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4181 MonoInternalThread *thread = (MonoInternalThread *)value;
4182 OffsetSize *data = (OffsetSize *)user;
4183 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4184 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4187 if (!thread->static_data || !thread->static_data [idx])
4189 ptr = ((char*) thread->static_data [idx]) + off;
4190 mono_gc_bzero_atomic (ptr, data->size);
4194 * LOCKING: requires that threads_mutex is held
4197 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4199 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4204 OffsetSize *data = (OffsetSize *)user;
4205 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4206 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4209 if (!ctx->static_data || !ctx->static_data [idx])
4212 ptr = ((char*) ctx->static_data [idx]) + off;
4213 mono_gc_bzero_atomic (ptr, data->size);
4217 do_free_special_slot (guint32 offset, guint32 size)
4219 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4221 StaticDataInfo *info;
4223 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4224 info = &thread_static_info;
4225 sets = thread_reference_bitmaps;
4227 info = &context_static_info;
4228 sets = context_reference_bitmaps;
4231 guint32 data_offset = offset;
4232 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4233 OffsetSize data = { data_offset, size };
4235 clear_reference_bitmap (sets, data.offset, data.size);
4237 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4238 if (threads != NULL)
4239 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4241 if (contexts != NULL)
4242 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4245 if (!mono_runtime_is_shutting_down ()) {
4246 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4248 item->offset = offset;
4251 item->next = info->freelist;
4252 info->freelist = item;
4257 do_free_special (gpointer key, gpointer value, gpointer data)
4259 MonoClassField *field = (MonoClassField *)key;
4260 guint32 offset = GPOINTER_TO_UINT (value);
4263 size = mono_type_size (field->type, &align);
4264 do_free_special_slot (offset, size);
4268 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4270 mono_threads_lock ();
4272 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4274 mono_threads_unlock ();
4278 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4280 /* Only ever called for ThreadLocal instances */
4281 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4283 mono_threads_lock ();
4284 do_free_special_slot (offset, size);
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 ();
4305 LOCK_THREAD (thread);
4307 /* MonoThread::interruption_requested can only be changed with atomics */
4308 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4309 /* this will consume pending APC calls */
4311 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4313 InterlockedDecrement (&thread_interruption_requested);
4315 /* Clear the interrupted flag of the thread so it can wait again */
4316 mono_thread_info_clear_self_interrupt ();
4319 if ((thread->state & ThreadState_AbortRequested) != 0) {
4320 UNLOCK_THREAD (thread);
4321 if (thread->abort_exc == NULL) {
4323 * This might be racy, but it has to be called outside the lock
4324 * since it calls managed code.
4326 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4328 return thread->abort_exc;
4330 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4331 self_suspend_internal (thread);
4334 else if ((thread->state & ThreadState_StopRequested) != 0) {
4335 /* FIXME: do this through the JIT? */
4337 UNLOCK_THREAD (thread);
4339 mono_thread_exit ();
4341 } else if (thread->pending_exception) {
4344 exc = thread->pending_exception;
4345 thread->pending_exception = NULL;
4347 UNLOCK_THREAD (thread);
4349 } else if (thread->thread_interrupt_requested) {
4351 thread->thread_interrupt_requested = FALSE;
4352 UNLOCK_THREAD (thread);
4354 return(mono_get_exception_thread_interrupted ());
4357 UNLOCK_THREAD (thread);
4363 * mono_thread_request_interruption
4365 * A signal handler can call this method to request the interruption of a
4366 * thread. The result of the interruption will depend on the current state of
4367 * the thread. If the result is an exception that needs to be throw, it is
4368 * provided as return value.
4371 mono_thread_request_interruption (gboolean running_managed)
4373 MonoInternalThread *thread = mono_thread_internal_current ();
4375 /* The thread may already be stopping */
4380 if (thread->interrupt_on_stop &&
4381 thread->state & ThreadState_StopRequested &&
4382 thread->state & ThreadState_Background)
4386 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4388 InterlockedIncrement (&thread_interruption_requested);
4390 if (!running_managed || is_running_protected_wrapper ()) {
4391 /* Can't stop while in unmanaged code. Increase the global interruption
4392 request count. When exiting the unmanaged method the count will be
4393 checked and the thread will be interrupted. */
4395 if (mono_thread_notify_pending_exc_fn && !running_managed)
4396 /* The JIT will notify the thread about the interruption */
4397 /* This shouldn't take any locks */
4398 mono_thread_notify_pending_exc_fn (NULL);
4400 /* this will awake the thread if it is in WaitForSingleObject
4402 /* Our implementation of this function ignores the func argument */
4404 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4406 mono_thread_info_self_interrupt ();
4411 return mono_thread_execute_interruption ();
4415 /*This function should be called by a thread after it has exited all of
4416 * its handle blocks at interruption time.*/
4418 mono_thread_resume_interruption (void)
4420 MonoInternalThread *thread = mono_thread_internal_current ();
4421 gboolean still_aborting;
4423 /* The thread may already be stopping */
4427 LOCK_THREAD (thread);
4428 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4429 UNLOCK_THREAD (thread);
4431 /*This can happen if the protected block called Thread::ResetAbort*/
4432 if (!still_aborting)
4435 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4437 InterlockedIncrement (&thread_interruption_requested);
4439 mono_thread_info_self_interrupt ();
4441 return mono_thread_execute_interruption ();
4444 gboolean mono_thread_interruption_requested ()
4446 if (thread_interruption_requested) {
4447 MonoInternalThread *thread = mono_thread_internal_current ();
4448 /* The thread may already be stopping */
4450 return (thread->interruption_requested);
4455 static MonoException*
4456 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4458 MonoInternalThread *thread = mono_thread_internal_current ();
4460 /* The thread may already be stopping */
4464 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4465 MonoException* exc = mono_thread_execute_interruption ();
4473 * Performs the interruption of the current thread, if one has been requested,
4474 * and the thread is not running a protected wrapper.
4475 * Return the exception which needs to be thrown, if any.
4478 mono_thread_interruption_checkpoint (void)
4480 return mono_thread_interruption_checkpoint_request (FALSE);
4484 * Performs the interruption of the current thread, if one has been requested.
4485 * Return the exception which needs to be thrown, if any.
4488 mono_thread_force_interruption_checkpoint_noraise (void)
4490 return mono_thread_interruption_checkpoint_request (TRUE);
4494 * mono_thread_get_and_clear_pending_exception:
4496 * Return any pending exceptions for the current thread and clear it as a side effect.
4499 mono_thread_get_and_clear_pending_exception (void)
4501 MonoInternalThread *thread = mono_thread_internal_current ();
4503 /* The thread may already be stopping */
4507 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4508 return mono_thread_execute_interruption ();
4511 if (thread->pending_exception) {
4512 MonoException *exc = thread->pending_exception;
4514 thread->pending_exception = NULL;
4522 * mono_set_pending_exception:
4524 * Set the pending exception of the current thread to EXC.
4525 * The exception will be thrown when execution returns to managed code.
4528 mono_set_pending_exception (MonoException *exc)
4530 MonoInternalThread *thread = mono_thread_internal_current ();
4532 /* The thread may already be stopping */
4536 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4538 mono_thread_request_interruption (FALSE);
4542 * mono_thread_interruption_request_flag:
4544 * Returns the address of a flag that will be non-zero if an interruption has
4545 * been requested for a thread. The thread to interrupt may not be the current
4546 * thread, so an additional call to mono_thread_interruption_requested() or
4547 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4550 gint32* mono_thread_interruption_request_flag ()
4552 return &thread_interruption_requested;
4556 mono_thread_init_apartment_state (void)
4559 MonoInternalThread* thread = mono_thread_internal_current ();
4561 /* Positive return value indicates success, either
4562 * S_OK if this is first CoInitialize call, or
4563 * S_FALSE if CoInitialize already called, but with same
4564 * threading model. A negative value indicates failure,
4565 * probably due to trying to change the threading model.
4567 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4568 ? COINIT_APARTMENTTHREADED
4569 : COINIT_MULTITHREADED) < 0) {
4570 thread->apartment_state = ThreadApartmentState_Unknown;
4576 mono_thread_cleanup_apartment_state (void)
4579 MonoInternalThread* thread = mono_thread_internal_current ();
4581 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4588 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4590 LOCK_THREAD (thread);
4591 thread->state |= state;
4592 UNLOCK_THREAD (thread);
4596 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4598 LOCK_THREAD (thread);
4599 thread->state &= ~state;
4600 UNLOCK_THREAD (thread);
4604 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4606 gboolean ret = FALSE;
4608 LOCK_THREAD (thread);
4610 if ((thread->state & test) != 0) {
4614 UNLOCK_THREAD (thread);
4619 static gboolean has_tls_get = FALSE;
4622 mono_runtime_set_has_tls_get (gboolean val)
4628 mono_runtime_has_tls_get (void)
4634 self_interrupt_thread (void *_unused)
4636 MonoThreadInfo *info = mono_thread_info_current ();
4637 MonoException *exc = mono_thread_execute_interruption ();
4638 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4639 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. */
4640 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4644 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4648 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4652 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4654 MonoJitInfo **dest = (MonoJitInfo **)data;
4660 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4662 MonoJitInfo *ji = NULL;
4665 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4670 MonoInternalThread *thread;
4671 gboolean install_async_abort;
4672 MonoThreadInfoInterruptToken *interrupt_token;
4675 static SuspendThreadResult
4676 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4678 AbortThreadData *data = (AbortThreadData *)ud;
4679 MonoInternalThread *thread = data->thread;
4680 MonoJitInfo *ji = NULL;
4681 gboolean protected_wrapper;
4682 gboolean running_managed;
4684 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4685 return MonoResumeThread;
4687 /*someone is already interrupting it*/
4688 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4689 return MonoResumeThread;
4691 InterlockedIncrement (&thread_interruption_requested);
4693 ji = mono_thread_info_get_last_managed (info);
4694 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4695 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4697 if (!protected_wrapper && running_managed) {
4698 /*We are in managed code*/
4699 /*Set the thread to call */
4700 if (data->install_async_abort)
4701 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4702 return MonoResumeThread;
4704 if (mono_thread_notify_pending_exc_fn)
4705 /* The JIT will notify the thread about the interruption */
4706 mono_thread_notify_pending_exc_fn (info);
4709 * This will cause waits to be broken.
4710 * It will also prevent the thread from entering a wait, so if the thread returns
4711 * from the wait before it receives the abort signal, it will just spin in the wait
4712 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4715 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4717 return MonoResumeThread;
4722 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4724 AbortThreadData data = { 0 };
4725 data.thread = thread;
4726 data.install_async_abort = install_async_abort;
4729 FIXME this is insanely broken, it doesn't cause interruption to happen
4730 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4732 if (thread == mono_thread_internal_current ()) {
4733 /* Do it synchronously */
4734 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4736 mono_raise_exception (exc);
4738 mono_thread_info_self_interrupt ();
4743 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4744 if (data.interrupt_token)
4745 mono_thread_info_finish_interrupt (data.interrupt_token);
4746 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4750 MonoInternalThread *thread;
4752 MonoThreadInfoInterruptToken *interrupt_token;
4753 } SuspendThreadData;
4755 static SuspendThreadResult
4756 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4758 SuspendThreadData *data = (SuspendThreadData *)ud;
4759 MonoInternalThread *thread = data->thread;
4760 MonoJitInfo *ji = NULL;
4761 gboolean protected_wrapper;
4762 gboolean running_managed;
4764 ji = mono_thread_info_get_last_managed (info);
4765 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4766 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4768 if (running_managed && !protected_wrapper) {
4769 thread->state &= ~ThreadState_SuspendRequested;
4770 thread->state |= ThreadState_Suspended;
4771 return KeepSuspended;
4773 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4774 InterlockedIncrement (&thread_interruption_requested);
4775 if (data->interrupt)
4776 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4778 if (mono_thread_notify_pending_exc_fn && !running_managed)
4779 /* The JIT will notify the thread about the interruption */
4780 mono_thread_notify_pending_exc_fn (info);
4781 return MonoResumeThread;
4786 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4788 if (thread == mono_thread_internal_current ()) {
4789 mono_thread_info_begin_self_suspend ();
4790 //XXX replace this with better named functions
4791 thread->state &= ~ThreadState_SuspendRequested;
4792 thread->state |= ThreadState_Suspended;
4793 UNLOCK_THREAD (thread);
4794 mono_thread_info_end_self_suspend ();
4796 SuspendThreadData data = { 0 };
4797 data.thread = thread;
4798 data.interrupt = interrupt;
4800 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4801 if (data.interrupt_token)
4802 mono_thread_info_finish_interrupt (data.interrupt_token);
4803 UNLOCK_THREAD (thread);
4807 /*This is called with @thread synch_cs held and it must release it*/
4809 self_suspend_internal (MonoInternalThread *thread)
4811 mono_thread_info_begin_self_suspend ();
4812 thread->state &= ~ThreadState_SuspendRequested;
4813 thread->state |= ThreadState_Suspended;
4814 UNLOCK_THREAD (thread);
4815 mono_thread_info_end_self_suspend ();
4820 * mono_thread_is_foreign:
4821 * @thread: the thread to query
4823 * This function allows one to determine if a thread was created by the mono runtime and has
4824 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4826 * Returns: true if @thread was not created by the runtime.
4829 mono_thread_is_foreign (MonoThread *thread)
4831 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4832 return info->runtime_thread == FALSE;
4836 * mono_add_joinable_thread:
4838 * Add TID to the list of joinable threads.
4839 * LOCKING: Acquires the threads lock.
4842 mono_threads_add_joinable_thread (gpointer tid)
4846 * We cannot detach from threads because it causes problems like
4847 * 2fd16f60/r114307. So we collect them and join them when
4848 * we have time (in he finalizer thread).
4850 joinable_threads_lock ();
4851 if (!joinable_threads)
4852 joinable_threads = g_hash_table_new (NULL, NULL);
4853 g_hash_table_insert (joinable_threads, tid, tid);
4854 joinable_thread_count ++;
4855 joinable_threads_unlock ();
4857 mono_gc_finalize_notify ();
4862 * mono_threads_join_threads:
4864 * Join all joinable threads. This is called from the finalizer thread.
4865 * LOCKING: Acquires the threads lock.
4868 mono_threads_join_threads (void)
4871 GHashTableIter iter;
4878 if (!joinable_thread_count)
4882 joinable_threads_lock ();
4884 if (g_hash_table_size (joinable_threads)) {
4885 g_hash_table_iter_init (&iter, joinable_threads);
4886 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4887 thread = (pthread_t)tid;
4888 g_hash_table_remove (joinable_threads, key);
4889 joinable_thread_count --;
4892 joinable_threads_unlock ();
4894 if (thread != pthread_self ())
4895 /* This shouldn't block */
4896 pthread_join (thread, NULL);
4907 * Wait for thread TID to exit.
4908 * LOCKING: Acquires the threads lock.
4911 mono_thread_join (gpointer tid)
4915 gboolean found = FALSE;
4917 joinable_threads_lock ();
4918 if (!joinable_threads)
4919 joinable_threads = g_hash_table_new (NULL, NULL);
4920 if (g_hash_table_lookup (joinable_threads, tid)) {
4921 g_hash_table_remove (joinable_threads, tid);
4922 joinable_thread_count --;
4925 joinable_threads_unlock ();
4928 thread = (pthread_t)tid;
4929 pthread_join (thread, NULL);
4934 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4936 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4937 mono_thread_interruption_checkpoint ();
4940 static inline gboolean
4941 is_appdomainunloaded_exception (MonoClass *klass)
4943 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4945 if (!app_domain_unloaded_exception_klass)
4946 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4947 g_assert (app_domain_unloaded_exception_klass);
4949 return klass == app_domain_unloaded_exception_klass;
4952 static inline gboolean
4953 is_threadabort_exception (MonoClass *klass)
4955 return klass == mono_defaults.threadabortexception_class;
4959 mono_thread_internal_unhandled_exception (MonoObject* exc)
4961 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4962 MonoClass *klass = exc->vtable->klass;
4963 if (is_threadabort_exception (klass)) {
4964 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4965 } else if (!is_appdomainunloaded_exception (klass)) {
4966 mono_unhandled_exception (exc);
4967 if (mono_environment_exitcode_get () == 1)
4974 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4976 mono_threads_get_thread_dump (out_threads, out_stack_traces);