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;
2310 UNLOCK_THREAD (thread);
2312 suspend_thread_internal (thread, FALSE);
2317 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2319 if (!mono_thread_suspend (this_obj->internal_thread)) {
2320 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2325 /* LOCKING: LOCK_THREAD(thread) must be held */
2327 mono_thread_resume (MonoInternalThread *thread)
2329 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2330 thread->state &= ~ThreadState_SuspendRequested;
2334 if ((thread->state & ThreadState_Suspended) == 0 ||
2335 (thread->state & ThreadState_Unstarted) != 0 ||
2336 (thread->state & ThreadState_Aborted) != 0 ||
2337 (thread->state & ThreadState_Stopped) != 0)
2342 UNLOCK_THREAD (thread);
2344 /* Awake the thread */
2345 if (!mono_thread_info_resume (thread_get_tid (thread)))
2348 LOCK_THREAD (thread);
2350 thread->state &= ~ThreadState_Suspended;
2356 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2358 if (!thread->internal_thread) {
2359 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2361 LOCK_THREAD (thread->internal_thread);
2362 if (!mono_thread_resume (thread->internal_thread))
2363 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2364 UNLOCK_THREAD (thread->internal_thread);
2369 mono_threads_is_critical_method (MonoMethod *method)
2371 switch (method->wrapper_type) {
2372 case MONO_WRAPPER_RUNTIME_INVOKE:
2373 case MONO_WRAPPER_XDOMAIN_INVOKE:
2374 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2381 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2386 if (mono_threads_is_critical_method (m)) {
2387 *((gboolean*)data) = TRUE;
2394 is_running_protected_wrapper (void)
2396 gboolean found = FALSE;
2397 mono_stack_walk (find_wrapper, &found);
2401 void mono_thread_internal_stop (MonoInternalThread *thread)
2403 LOCK_THREAD (thread);
2405 if ((thread->state & ThreadState_StopRequested) != 0 ||
2406 (thread->state & ThreadState_Stopped) != 0)
2408 UNLOCK_THREAD (thread);
2412 /* Make sure the thread is awake */
2413 mono_thread_resume (thread);
2415 thread->state |= ThreadState_StopRequested;
2416 thread->state &= ~ThreadState_AbortRequested;
2418 UNLOCK_THREAD (thread);
2420 abort_thread_internal (thread, TRUE, TRUE);
2423 void mono_thread_stop (MonoThread *thread)
2425 mono_thread_internal_stop (thread->internal_thread);
2429 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2431 gint8 tmp = *(volatile gint8 *)ptr;
2432 mono_memory_barrier ();
2437 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2439 gint16 tmp = *(volatile gint16 *)ptr;
2440 mono_memory_barrier ();
2445 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2447 gint32 tmp = *(volatile gint32 *)ptr;
2448 mono_memory_barrier ();
2453 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2455 gint64 tmp = *(volatile gint64 *)ptr;
2456 mono_memory_barrier ();
2461 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2463 volatile void *tmp = *(volatile void **)ptr;
2464 mono_memory_barrier ();
2465 return (void *) tmp;
2469 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2471 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2472 mono_memory_barrier ();
2473 return (MonoObject *) tmp;
2477 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2479 double tmp = *(volatile double *)ptr;
2480 mono_memory_barrier ();
2485 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2487 float tmp = *(volatile float *)ptr;
2488 mono_memory_barrier ();
2493 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2495 return InterlockedRead8 ((volatile gint8 *)ptr);
2499 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2501 return InterlockedRead16 ((volatile gint16 *)ptr);
2505 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2507 return InterlockedRead ((volatile gint32 *)ptr);
2511 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2513 #if SIZEOF_VOID_P == 4
2514 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2516 mono_interlocked_lock ();
2517 val = *(gint64*)ptr;
2518 mono_interlocked_unlock ();
2522 return InterlockedRead64 ((volatile gint64 *)ptr);
2526 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2528 return InterlockedReadPointer ((volatile gpointer *)ptr);
2532 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2536 #if SIZEOF_VOID_P == 4
2537 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2539 mono_interlocked_lock ();
2540 val = *(double*)ptr;
2541 mono_interlocked_unlock ();
2546 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2552 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2556 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2562 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2564 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2568 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2570 mono_memory_barrier ();
2571 *(volatile gint8 *)ptr = value;
2575 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2577 mono_memory_barrier ();
2578 *(volatile gint16 *)ptr = value;
2582 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2584 mono_memory_barrier ();
2585 *(volatile gint32 *)ptr = value;
2589 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2591 mono_memory_barrier ();
2592 *(volatile gint64 *)ptr = value;
2596 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2598 mono_memory_barrier ();
2599 *(volatile void **)ptr = value;
2603 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2605 mono_memory_barrier ();
2606 mono_gc_wbarrier_generic_store (ptr, value);
2610 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2612 mono_memory_barrier ();
2613 *(volatile double *)ptr = value;
2617 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2619 mono_memory_barrier ();
2620 *(volatile float *)ptr = value;
2624 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2626 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2630 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2632 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2636 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2638 InterlockedWrite ((volatile gint32 *)ptr, value);
2642 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2644 #if SIZEOF_VOID_P == 4
2645 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2646 mono_interlocked_lock ();
2647 *(gint64*)ptr = value;
2648 mono_interlocked_unlock ();
2653 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2657 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2659 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2663 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2667 #if SIZEOF_VOID_P == 4
2668 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2669 mono_interlocked_lock ();
2670 *(double*)ptr = value;
2671 mono_interlocked_unlock ();
2678 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2682 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2688 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2692 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2694 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2698 free_context (void *user_data)
2700 ContextStaticData *data = user_data;
2702 mono_threads_lock ();
2705 * There is no guarantee that, by the point this reference queue callback
2706 * has been invoked, the GC handle associated with the object will fail to
2707 * resolve as one might expect. So if we don't free and remove the GC
2708 * handle here, free_context_static_data_helper () could end up resolving
2709 * a GC handle to an actually-dead context which would contain a pointer
2710 * to an already-freed static data segment, resulting in a crash when
2713 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2715 mono_threads_unlock ();
2717 mono_gchandle_free (data->gc_handle);
2718 mono_free_static_data (data->static_data);
2723 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2725 mono_threads_lock ();
2727 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2730 contexts = g_hash_table_new (NULL, NULL);
2733 context_queue = mono_gc_reference_queue_new (free_context);
2735 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2736 g_hash_table_insert (contexts, gch, gch);
2739 * We use this intermediate structure to contain a duplicate pointer to
2740 * the static data because we can't rely on being able to resolve the GC
2741 * handle in the reference queue callback.
2743 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2744 data->gc_handle = GPOINTER_TO_UINT (gch);
2747 context_adjust_static_data (ctx);
2748 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2750 mono_threads_unlock ();
2752 mono_profiler_context_loaded (ctx);
2756 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2759 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2760 * cleanup in exceptional circumstances, we don't actually do any
2761 * cleanup work here. We instead do this via a reference queue.
2764 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2766 mono_profiler_context_unloaded (ctx);
2770 mono_thread_init_tls (void)
2772 MONO_FAST_TLS_INIT (tls_current_object);
2773 mono_native_tls_alloc (¤t_object_key, NULL);
2776 void mono_thread_init (MonoThreadStartCB start_cb,
2777 MonoThreadAttachCB attach_cb)
2779 mono_coop_mutex_init_recursive (&threads_mutex);
2781 mono_os_mutex_init_recursive(&interlocked_mutex);
2782 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2784 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2785 g_assert(background_change_event != NULL);
2787 mono_init_static_data_info (&thread_static_info);
2788 mono_init_static_data_info (&context_static_info);
2790 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2792 mono_thread_start_cb = start_cb;
2793 mono_thread_attach_cb = attach_cb;
2795 /* Get a pseudo handle to the current process. This is just a
2796 * kludge so that wapi can build a process handle if needed.
2797 * As a pseudo handle is returned, we don't need to clean
2800 GetCurrentProcess ();
2803 void mono_thread_cleanup (void)
2805 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2806 MonoThreadInfo *info;
2808 /* The main thread must abandon any held mutexes (particularly
2809 * important for named mutexes as they are shared across
2810 * processes, see bug 74680.) This will happen when the
2811 * thread exits, but if it's not running in a subthread it
2812 * won't exit in time.
2814 info = mono_thread_info_current ();
2815 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2819 /* This stuff needs more testing, it seems one of these
2820 * critical sections can be locked when mono_thread_cleanup is
2823 mono_coop_mutex_destroy (&threads_mutex);
2824 mono_os_mutex_destroy (&interlocked_mutex);
2825 mono_os_mutex_destroy (&delayed_free_table_mutex);
2826 mono_os_mutex_destroy (&small_id_mutex);
2827 CloseHandle (background_change_event);
2830 mono_native_tls_free (current_object_key);
2834 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2836 mono_thread_cleanup_fn = func;
2840 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2842 thread->internal_thread->manage_callback = func;
2845 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2847 mono_thread_notify_pending_exc_fn = func;
2851 static void print_tids (gpointer key, gpointer value, gpointer user)
2853 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2854 * sizeof(uint) and a cast to uint would overflow
2856 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2857 * print this as a pointer.
2859 g_message ("Waiting for: %p", key);
2864 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2865 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2869 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2873 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2875 MONO_PREPARE_BLOCKING;
2876 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2877 MONO_FINISH_BLOCKING;
2879 if(ret==WAIT_FAILED) {
2880 /* See the comment in build_wait_tids() */
2881 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2885 for(i=0; i<wait->num; i++)
2886 CloseHandle (wait->handles[i]);
2888 if (ret == WAIT_TIMEOUT)
2891 for(i=0; i<wait->num; i++) {
2892 gsize tid = wait->threads[i]->tid;
2895 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2896 * it can still run io-layer etc. code. So wait for it to really exit.
2897 * FIXME: This won't join threads which are not in the joinable_hash yet.
2899 mono_thread_join ((gpointer)tid);
2901 mono_threads_lock ();
2902 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2903 /* This thread must have been killed, because
2904 * it hasn't cleaned itself up. (It's just
2905 * possible that the thread exited before the
2906 * parent thread had a chance to store the
2907 * handle, and now there is another pointer to
2908 * the already-exited thread stored. In this
2909 * case, we'll just get two
2910 * mono_profiler_thread_end() calls for the
2914 mono_threads_unlock ();
2915 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2916 thread_cleanup (wait->threads[i]);
2918 mono_threads_unlock ();
2923 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2925 guint32 i, ret, count;
2927 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2929 /* Add the thread state change event, so it wakes up if a thread changes
2930 * to background mode.
2933 if (count < MAXIMUM_WAIT_OBJECTS) {
2934 wait->handles [count] = background_change_event;
2938 MONO_PREPARE_BLOCKING;
2939 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2940 MONO_FINISH_BLOCKING;
2942 if(ret==WAIT_FAILED) {
2943 /* See the comment in build_wait_tids() */
2944 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2948 for(i=0; i<wait->num; i++)
2949 CloseHandle (wait->handles[i]);
2951 if (ret == WAIT_TIMEOUT)
2954 if (ret < wait->num) {
2955 gsize tid = wait->threads[ret]->tid;
2956 mono_threads_lock ();
2957 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2958 /* See comment in wait_for_tids about thread cleanup */
2959 mono_threads_unlock ();
2960 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2961 thread_cleanup (wait->threads [ret]);
2963 mono_threads_unlock ();
2967 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2969 struct wait_data *wait=(struct wait_data *)user;
2971 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2973 MonoInternalThread *thread=(MonoInternalThread *)value;
2975 /* Ignore background threads, we abort them later */
2976 /* Do not lock here since it is not needed and the caller holds threads_lock */
2977 if (thread->state & ThreadState_Background) {
2978 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2979 return; /* just leave, ignore */
2982 if (mono_gc_is_finalizer_internal_thread (thread)) {
2983 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2987 if (thread == mono_thread_internal_current ()) {
2988 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2992 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2993 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2997 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2998 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3002 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3003 if (handle == NULL) {
3004 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3008 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3009 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3010 wait->handles[wait->num]=handle;
3011 wait->threads[wait->num]=thread;
3014 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3016 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3021 /* Just ignore the rest, we can't do anything with
3028 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3030 struct wait_data *wait=(struct wait_data *)user;
3031 MonoNativeThreadId self = mono_native_thread_id_get ();
3032 MonoInternalThread *thread = (MonoInternalThread *)value;
3035 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3038 /* The finalizer thread is not a background thread */
3039 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3040 && (thread->state & ThreadState_Background) != 0
3041 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3043 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3047 /* printf ("A: %d\n", wait->num); */
3048 wait->handles[wait->num]=thread->handle;
3049 wait->threads[wait->num]=thread;
3052 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3053 mono_thread_internal_stop (thread);
3057 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3058 && !mono_gc_is_finalizer_internal_thread (thread);
3062 * mono_threads_set_shutting_down:
3064 * Is called by a thread that wants to shut down Mono. If the runtime is already
3065 * shutting down, the calling thread is suspended/stopped, and this function never
3069 mono_threads_set_shutting_down (void)
3071 MonoInternalThread *current_thread = mono_thread_internal_current ();
3073 mono_threads_lock ();
3075 if (shutting_down) {
3076 mono_threads_unlock ();
3078 /* Make sure we're properly suspended/stopped */
3080 LOCK_THREAD (current_thread);
3082 if ((current_thread->state & ThreadState_SuspendRequested) ||
3083 (current_thread->state & ThreadState_AbortRequested) ||
3084 (current_thread->state & ThreadState_StopRequested)) {
3085 UNLOCK_THREAD (current_thread);
3086 mono_thread_execute_interruption ();
3088 current_thread->state |= ThreadState_Stopped;
3089 UNLOCK_THREAD (current_thread);
3092 /*since we're killing the thread, unset the current domain.*/
3093 mono_domain_unset ();
3095 /* Wake up other threads potentially waiting for us */
3096 mono_thread_info_exit ();
3098 shutting_down = TRUE;
3100 /* Not really a background state change, but this will
3101 * interrupt the main thread if it is waiting for all
3102 * the other threads.
3104 SetEvent (background_change_event);
3106 mono_threads_unlock ();
3110 void mono_thread_manage (void)
3112 struct wait_data wait_data;
3113 struct wait_data *wait = &wait_data;
3115 memset (wait, 0, sizeof (struct wait_data));
3116 /* join each thread that's still running */
3117 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3119 mono_threads_lock ();
3121 THREAD_DEBUG (g_message("%s: No threads", __func__));
3122 mono_threads_unlock ();
3125 mono_threads_unlock ();
3128 mono_threads_lock ();
3129 if (shutting_down) {
3130 /* somebody else is shutting down */
3131 mono_threads_unlock ();
3134 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3135 mono_g_hash_table_foreach (threads, print_tids, NULL));
3137 ResetEvent (background_change_event);
3139 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3140 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3141 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3142 mono_threads_unlock ();
3144 /* Something to wait for */
3145 wait_for_tids_or_state_change (wait, INFINITE);
3147 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3148 } while(wait->num>0);
3150 /* Mono is shutting down, so just wait for the end */
3151 if (!mono_runtime_try_shutdown ()) {
3152 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3153 mono_thread_suspend (mono_thread_internal_current ());
3154 mono_thread_execute_interruption ();
3158 * Remove everything but the finalizer thread and self.
3159 * Also abort all the background threads
3162 mono_threads_lock ();
3165 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3166 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3167 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3169 mono_threads_unlock ();
3171 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3173 /* Something to wait for */
3174 wait_for_tids (wait, INFINITE);
3176 } while (wait->num > 0);
3179 * give the subthreads a chance to really quit (this is mainly needed
3180 * to get correct user and system times from getrusage/wait/time(1)).
3181 * This could be removed if we avoid pthread_detach() and use pthread_join().
3183 mono_thread_info_yield ();
3187 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3189 MonoInternalThread *thread = (MonoInternalThread*)value;
3190 struct wait_data *wait = (struct wait_data*)user_data;
3194 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3196 * This needs no locking.
3198 if ((thread->state & ThreadState_Suspended) != 0 ||
3199 (thread->state & ThreadState_Stopped) != 0)
3202 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3203 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3207 wait->handles [wait->num] = handle;
3208 wait->threads [wait->num] = thread;
3214 * mono_thread_suspend_all_other_threads:
3216 * Suspend all managed threads except the finalizer thread and this thread. It is
3217 * not possible to resume them later.
3219 void mono_thread_suspend_all_other_threads (void)
3221 struct wait_data wait_data;
3222 struct wait_data *wait = &wait_data;
3224 MonoNativeThreadId self = mono_native_thread_id_get ();
3225 guint32 eventidx = 0;
3226 gboolean starting, finished;
3228 memset (wait, 0, sizeof (struct wait_data));
3230 * The other threads could be in an arbitrary state at this point, i.e.
3231 * they could be starting up, shutting down etc. This means that there could be
3232 * threads which are not even in the threads hash table yet.
3236 * First we set a barrier which will be checked by all threads before they
3237 * are added to the threads hash table, and they will exit if the flag is set.
3238 * This ensures that no threads could be added to the hash later.
3239 * We will use shutting_down as the barrier for now.
3241 g_assert (shutting_down);
3244 * We make multiple calls to WaitForMultipleObjects since:
3245 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3246 * - some threads could exit without becoming suspended
3251 * Make a copy of the hashtable since we can't do anything with
3252 * threads while threads_mutex is held.
3255 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3256 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3257 mono_threads_lock ();
3258 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3259 mono_threads_unlock ();
3262 /* Get the suspended events that we'll be waiting for */
3263 for (i = 0; i < wait->num; ++i) {
3264 MonoInternalThread *thread = wait->threads [i];
3266 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3267 || mono_gc_is_finalizer_internal_thread (thread)
3268 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3270 //CloseHandle (wait->handles [i]);
3271 wait->threads [i] = NULL; /* ignore this thread in next loop */
3275 LOCK_THREAD (thread);
3277 if ((thread->state & ThreadState_Suspended) != 0 ||
3278 (thread->state & ThreadState_StopRequested) != 0 ||
3279 (thread->state & ThreadState_Stopped) != 0) {
3280 UNLOCK_THREAD (thread);
3281 CloseHandle (wait->handles [i]);
3282 wait->threads [i] = NULL; /* ignore this thread in next loop */
3288 /* Convert abort requests into suspend requests */
3289 if ((thread->state & ThreadState_AbortRequested) != 0)
3290 thread->state &= ~ThreadState_AbortRequested;
3292 thread->state |= ThreadState_SuspendRequested;
3294 UNLOCK_THREAD (thread);
3296 /* Signal the thread to suspend */
3297 suspend_thread_internal (thread, TRUE);
3299 if (eventidx <= 0) {
3301 * If there are threads which are starting up, we wait until they
3302 * are suspended when they try to register in the threads hash.
3303 * This is guaranteed to finish, since the threads which can create new
3304 * threads get suspended after a while.
3305 * FIXME: The finalizer thread can still create new threads.
3307 mono_threads_lock ();
3308 if (threads_starting_up)
3309 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3312 mono_threads_unlock ();
3314 mono_thread_info_sleep (100, NULL);
3322 MonoInternalThread *thread;
3323 MonoStackFrameInfo *frames;
3324 int nframes, max_frames;
3325 int nthreads, max_threads;
3326 MonoInternalThread **threads;
3327 } ThreadDumpUserData;
3329 static gboolean thread_dump_requested;
3331 /* This needs to be async safe */
3333 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3335 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3337 if (ud->nframes < ud->max_frames) {
3338 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3345 /* This needs to be async safe */
3346 static SuspendThreadResult
3347 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3349 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3350 MonoInternalThread *thread = user_data->thread;
3353 /* This no longer works with remote unwinding */
3355 wapi_desc = wapi_current_thread_desc ();
3356 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3361 if (thread == mono_thread_internal_current ())
3362 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3364 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3366 return MonoResumeThread;
3370 int nthreads, max_threads;
3371 MonoInternalThread **threads;
3372 } CollectThreadsUserData;
3375 collect_thread (gpointer key, gpointer value, gpointer user)
3377 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3378 MonoInternalThread *thread = (MonoInternalThread *)value;
3380 if (ud->nthreads < ud->max_threads)
3381 ud->threads [ud->nthreads ++] = thread;
3385 * Collect running threads into the THREADS array.
3386 * THREADS should be an array allocated on the stack.
3389 collect_threads (MonoInternalThread **thread_array, int max_threads)
3391 CollectThreadsUserData ud;
3393 memset (&ud, 0, sizeof (ud));
3394 /* This array contains refs, but its on the stack, so its ok */
3395 ud.threads = thread_array;
3396 ud.max_threads = max_threads;
3398 mono_threads_lock ();
3399 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3400 mono_threads_unlock ();
3406 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3408 GString* text = g_string_new (0);
3410 GError *error = NULL;
3413 ud->thread = thread;
3416 /* Collect frames for the thread */
3417 if (thread == mono_thread_internal_current ()) {
3418 get_thread_dump (mono_thread_info_current (), ud);
3420 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3424 * Do all the non async-safe work outside of get_thread_dump.
3427 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3429 g_string_append_printf (text, "\n\"%s\"", name);
3432 else if (thread->threadpool_thread) {
3433 g_string_append (text, "\n\"<threadpool thread>\"");
3435 g_string_append (text, "\n\"<unnamed thread>\"");
3438 for (i = 0; i < ud->nframes; ++i) {
3439 MonoStackFrameInfo *frame = &ud->frames [i];
3440 MonoMethod *method = NULL;
3442 if (frame->type == FRAME_TYPE_MANAGED)
3443 method = mono_jit_info_get_method (frame->ji);
3446 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3447 g_string_append_printf (text, " %s\n", location);
3450 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3454 fprintf (stdout, "%s", text->str);
3456 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3457 OutputDebugStringA(text->str);
3460 g_string_free (text, TRUE);
3465 mono_threads_perform_thread_dump (void)
3467 ThreadDumpUserData ud;
3468 MonoInternalThread *thread_array [128];
3469 int tindex, nthreads;
3471 if (!thread_dump_requested)
3474 printf ("Full thread dump:\n");
3476 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3477 nthreads = collect_threads (thread_array, 128);
3479 memset (&ud, 0, sizeof (ud));
3480 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3481 ud.max_frames = 256;
3483 for (tindex = 0; tindex < nthreads; ++tindex)
3484 dump_thread (thread_array [tindex], &ud);
3488 thread_dump_requested = FALSE;
3491 /* Obtain the thread dump of all threads */
3493 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3496 ThreadDumpUserData ud;
3497 MonoInternalThread *thread_array [128];
3498 MonoDomain *domain = mono_domain_get ();
3499 MonoDebugSourceLocation *location;
3500 int tindex, nthreads;
3502 mono_error_init (&error);
3504 *out_threads = NULL;
3505 *out_stack_frames = NULL;
3507 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3508 nthreads = collect_threads (thread_array, 128);
3510 memset (&ud, 0, sizeof (ud));
3511 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3512 ud.max_frames = 256;
3514 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3515 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3517 for (tindex = 0; tindex < nthreads; ++tindex) {
3518 MonoInternalThread *thread = thread_array [tindex];
3519 MonoArray *thread_frames;
3525 /* Collect frames for the thread */
3526 if (thread == mono_thread_internal_current ()) {
3527 get_thread_dump (mono_thread_info_current (), &ud);
3529 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3532 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3534 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3535 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3537 for (i = 0; i < ud.nframes; ++i) {
3538 MonoStackFrameInfo *frame = &ud.frames [i];
3539 MonoMethod *method = NULL;
3540 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3541 if (!mono_error_ok (&error))
3544 sf->native_offset = frame->native_offset;
3546 if (frame->type == FRAME_TYPE_MANAGED)
3547 method = mono_jit_info_get_method (frame->ji);
3550 sf->method_address = (gsize) frame->ji->code_start;
3552 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3554 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3556 sf->il_offset = location->il_offset;
3558 if (location && location->source_file) {
3559 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3560 sf->line = location->row;
3561 sf->column = location->column;
3563 mono_debug_free_source_location (location);
3568 mono_array_setref (thread_frames, i, sf);
3574 mono_error_raise_exception (&error); /* FIXME don't raise here */
3578 * mono_threads_request_thread_dump:
3580 * Ask all threads except the current to print their stacktrace to stdout.
3583 mono_threads_request_thread_dump (void)
3585 /*The new thread dump code runs out of the finalizer thread. */
3586 thread_dump_requested = TRUE;
3587 mono_gc_finalize_notify ();
3592 gint allocated; /* +1 so that refs [allocated] == NULL */
3596 typedef struct ref_stack RefStack;
3599 ref_stack_new (gint initial_size)
3603 initial_size = MAX (initial_size, 16) + 1;
3604 rs = g_new0 (RefStack, 1);
3605 rs->refs = g_new0 (gpointer, initial_size);
3606 rs->allocated = initial_size;
3611 ref_stack_destroy (gpointer ptr)
3613 RefStack *rs = (RefStack *)ptr;
3622 ref_stack_push (RefStack *rs, gpointer ptr)
3624 g_assert (rs != NULL);
3626 if (rs->bottom >= rs->allocated) {
3627 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3628 rs->allocated <<= 1;
3629 rs->refs [rs->allocated] = NULL;
3631 rs->refs [rs->bottom++] = ptr;
3635 ref_stack_pop (RefStack *rs)
3637 if (rs == NULL || rs->bottom == 0)
3641 rs->refs [rs->bottom] = NULL;
3645 ref_stack_find (RefStack *rs, gpointer ptr)
3652 for (refs = rs->refs; refs && *refs; refs++) {
3660 * mono_thread_push_appdomain_ref:
3662 * Register that the current thread may have references to objects in domain
3663 * @domain on its stack. Each call to this function should be paired with a
3664 * call to pop_appdomain_ref.
3667 mono_thread_push_appdomain_ref (MonoDomain *domain)
3669 MonoInternalThread *thread = mono_thread_internal_current ();
3672 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3673 SPIN_LOCK (thread->lock_thread_id);
3674 if (thread->appdomain_refs == NULL)
3675 thread->appdomain_refs = ref_stack_new (16);
3676 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3677 SPIN_UNLOCK (thread->lock_thread_id);
3682 mono_thread_pop_appdomain_ref (void)
3684 MonoInternalThread *thread = mono_thread_internal_current ();
3687 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3688 SPIN_LOCK (thread->lock_thread_id);
3689 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3690 SPIN_UNLOCK (thread->lock_thread_id);
3695 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3698 SPIN_LOCK (thread->lock_thread_id);
3699 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3700 SPIN_UNLOCK (thread->lock_thread_id);
3705 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3707 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3710 typedef struct abort_appdomain_data {
3711 struct wait_data wait;
3713 } abort_appdomain_data;
3716 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3718 MonoInternalThread *thread = (MonoInternalThread*)value;
3719 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3720 MonoDomain *domain = data->domain;
3722 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3723 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3725 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3726 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3729 data->wait.handles [data->wait.num] = handle;
3730 data->wait.threads [data->wait.num] = thread;
3733 /* Just ignore the rest, we can't do anything with
3741 * mono_threads_abort_appdomain_threads:
3743 * Abort threads which has references to the given appdomain.
3746 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3748 #ifdef __native_client__
3752 abort_appdomain_data user_data;
3754 int orig_timeout = timeout;
3757 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3759 start_time = mono_msec_ticks ();
3761 mono_threads_lock ();
3763 user_data.domain = domain;
3764 user_data.wait.num = 0;
3765 /* This shouldn't take any locks */
3766 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3767 mono_threads_unlock ();
3769 if (user_data.wait.num > 0) {
3770 /* Abort the threads outside the threads lock */
3771 for (i = 0; i < user_data.wait.num; ++i)
3772 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3775 * We should wait for the threads either to abort, or to leave the
3776 * domain. We can't do the latter, so we wait with a timeout.
3778 wait_for_tids (&user_data.wait, 100);
3781 /* Update remaining time */
3782 timeout -= mono_msec_ticks () - start_time;
3783 start_time = mono_msec_ticks ();
3785 if (orig_timeout != -1 && timeout < 0)
3788 while (user_data.wait.num > 0);
3790 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3796 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3798 MonoInternalThread *thread = (MonoInternalThread*)value;
3799 MonoDomain *domain = (MonoDomain*)user_data;
3802 /* No locking needed here */
3803 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3805 if (thread->cached_culture_info) {
3806 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3807 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3808 if (obj && obj->vtable->domain == domain)
3809 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3815 * mono_threads_clear_cached_culture:
3817 * Clear the cached_current_culture from all threads if it is in the
3821 mono_threads_clear_cached_culture (MonoDomain *domain)
3823 mono_threads_lock ();
3824 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3825 mono_threads_unlock ();
3829 * mono_thread_get_undeniable_exception:
3831 * Return an exception which needs to be raised when leaving a catch clause.
3832 * This is used for undeniable exception propagation.
3835 mono_thread_get_undeniable_exception (void)
3837 MonoInternalThread *thread = mono_thread_internal_current ();
3839 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3841 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3842 * exception if the thread no longer references a dying appdomain.
3844 thread->abort_exc->trace_ips = NULL;
3845 thread->abort_exc->stack_trace = NULL;
3846 return thread->abort_exc;
3852 #if MONO_SMALL_CONFIG
3853 #define NUM_STATIC_DATA_IDX 4
3854 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3858 #define NUM_STATIC_DATA_IDX 8
3859 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3860 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3864 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3865 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3868 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3870 gpointer *static_data = (gpointer *)addr;
3872 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3873 void **ptr = (void **)static_data [i];
3878 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3879 void **p = ptr + idx;
3882 mark_func ((MonoObject**)p, gc_data);
3888 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3890 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3894 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3896 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3900 * mono_alloc_static_data
3902 * Allocate memory blocks for storing threads or context static data
3905 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3907 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3910 gpointer* static_data = *static_data_ptr;
3912 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3913 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3915 if (mono_gc_user_markers_supported ()) {
3916 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3917 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3919 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3920 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3923 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3924 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3925 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3926 *static_data_ptr = static_data;
3927 static_data [0] = static_data;
3930 for (i = 1; i <= idx; ++i) {
3931 if (static_data [i])
3934 if (mono_gc_user_markers_supported ())
3935 static_data [i] = g_malloc0 (static_data_size [i]);
3937 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3938 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3939 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3944 mono_free_static_data (gpointer* static_data)
3947 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3948 gpointer p = static_data [i];
3952 * At this point, the static data pointer array is still registered with the
3953 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3954 * data. Freeing the individual arrays without first nulling their slots
3955 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3956 * such an already freed array. See bug #13813.
3958 static_data [i] = NULL;
3959 mono_memory_write_barrier ();
3960 if (mono_gc_user_markers_supported ())
3963 mono_gc_free_fixed (p);
3965 mono_gc_free_fixed (static_data);
3969 * mono_init_static_data_info
3971 * Initializes static data counters
3973 static void mono_init_static_data_info (StaticDataInfo *static_data)
3975 static_data->idx = 0;
3976 static_data->offset = 0;
3977 static_data->freelist = NULL;
3981 * mono_alloc_static_data_slot
3983 * Generates an offset for static data. static_data contains the counters
3984 * used to generate it.
3987 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3989 if (!static_data->idx && !static_data->offset) {
3991 * we use the first chunk of the first allocation also as
3992 * an array for the rest of the data
3994 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3996 static_data->offset += align - 1;
3997 static_data->offset &= ~(align - 1);
3998 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3999 static_data->idx ++;
4000 g_assert (size <= static_data_size [static_data->idx]);
4001 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4002 static_data->offset = 0;
4004 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4005 static_data->offset += size;
4010 * ensure thread static fields already allocated are valid for thread
4011 * This function is called when a thread is created or on thread attach.
4014 thread_adjust_static_data (MonoInternalThread *thread)
4016 mono_threads_lock ();
4017 if (thread_static_info.offset || thread_static_info.idx > 0) {
4018 /* get the current allocated size */
4019 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4020 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4022 mono_threads_unlock ();
4026 * LOCKING: requires that threads_mutex is held
4029 context_adjust_static_data (MonoAppContext *ctx)
4031 if (context_static_info.offset || context_static_info.idx > 0) {
4032 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4033 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4034 ctx->data->static_data = ctx->static_data;
4039 * LOCKING: requires that threads_mutex is held
4042 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4044 MonoInternalThread *thread = (MonoInternalThread *)value;
4045 guint32 offset = GPOINTER_TO_UINT (user);
4047 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4051 * LOCKING: requires that threads_mutex is held
4054 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4056 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4061 guint32 offset = GPOINTER_TO_UINT (user);
4062 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4063 ctx->data->static_data = ctx->static_data;
4066 static StaticDataFreeList*
4067 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4069 StaticDataFreeList* prev = NULL;
4070 StaticDataFreeList* tmp = static_data->freelist;
4072 if (tmp->size == size) {
4074 prev->next = tmp->next;
4076 static_data->freelist = tmp->next;
4085 #if SIZEOF_VOID_P == 4
4092 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4094 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4096 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4097 MonoBitSet *rb = sets [idx];
4098 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4099 offset /= sizeof (uintptr_t);
4100 /* offset is now the bitmap offset */
4101 for (int i = 0; i < numbits; ++i) {
4102 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4103 mono_bitset_set_fast (rb, offset + i);
4108 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4110 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4111 MonoBitSet *rb = sets [idx];
4112 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4113 offset /= sizeof (uintptr_t);
4114 /* offset is now the bitmap offset */
4115 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4116 mono_bitset_clear_fast (rb, offset + i);
4120 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4122 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4124 StaticDataInfo *info;
4127 if (static_type == SPECIAL_STATIC_THREAD) {
4128 info = &thread_static_info;
4129 sets = thread_reference_bitmaps;
4131 info = &context_static_info;
4132 sets = context_reference_bitmaps;
4135 mono_threads_lock ();
4137 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4141 offset = item->offset;
4144 offset = mono_alloc_static_data_slot (info, size, align);
4147 update_reference_bitmap (sets, offset, bitmap, numbits);
4149 if (static_type == SPECIAL_STATIC_THREAD) {
4150 /* This can be called during startup */
4151 if (threads != NULL)
4152 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4154 if (contexts != NULL)
4155 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4157 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4160 mono_threads_unlock ();
4166 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4168 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4170 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4171 return get_thread_static_data (thread, offset);
4173 return get_context_static_data (thread->current_appcontext, offset);
4178 mono_get_special_static_data (guint32 offset)
4180 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4189 * LOCKING: requires that threads_mutex is held
4192 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4194 MonoInternalThread *thread = (MonoInternalThread *)value;
4195 OffsetSize *data = (OffsetSize *)user;
4196 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4197 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4200 if (!thread->static_data || !thread->static_data [idx])
4202 ptr = ((char*) thread->static_data [idx]) + off;
4203 mono_gc_bzero_atomic (ptr, data->size);
4207 * LOCKING: requires that threads_mutex is held
4210 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4212 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4217 OffsetSize *data = (OffsetSize *)user;
4218 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4219 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4222 if (!ctx->static_data || !ctx->static_data [idx])
4225 ptr = ((char*) ctx->static_data [idx]) + off;
4226 mono_gc_bzero_atomic (ptr, data->size);
4230 do_free_special_slot (guint32 offset, guint32 size)
4232 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4234 StaticDataInfo *info;
4236 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4237 info = &thread_static_info;
4238 sets = thread_reference_bitmaps;
4240 info = &context_static_info;
4241 sets = context_reference_bitmaps;
4244 guint32 data_offset = offset;
4245 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4246 OffsetSize data = { data_offset, size };
4248 clear_reference_bitmap (sets, data.offset, data.size);
4250 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4251 if (threads != NULL)
4252 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4254 if (contexts != NULL)
4255 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4258 if (!mono_runtime_is_shutting_down ()) {
4259 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4261 item->offset = offset;
4264 item->next = info->freelist;
4265 info->freelist = item;
4270 do_free_special (gpointer key, gpointer value, gpointer data)
4272 MonoClassField *field = (MonoClassField *)key;
4273 guint32 offset = GPOINTER_TO_UINT (value);
4276 size = mono_type_size (field->type, &align);
4277 do_free_special_slot (offset, size);
4281 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4283 mono_threads_lock ();
4285 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4287 mono_threads_unlock ();
4291 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4293 /* Only ever called for ThreadLocal instances */
4294 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4296 mono_threads_lock ();
4297 do_free_special_slot (offset, size);
4298 mono_threads_unlock ();
4302 static void CALLBACK dummy_apc (ULONG_PTR param)
4308 * mono_thread_execute_interruption
4310 * Performs the operation that the requested thread state requires (abort,
4313 static MonoException*
4314 mono_thread_execute_interruption (void)
4316 MonoInternalThread *thread = mono_thread_internal_current ();
4318 LOCK_THREAD (thread);
4320 /* MonoThread::interruption_requested can only be changed with atomics */
4321 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4322 /* this will consume pending APC calls */
4324 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4326 InterlockedDecrement (&thread_interruption_requested);
4328 /* Clear the interrupted flag of the thread so it can wait again */
4329 mono_thread_info_clear_self_interrupt ();
4332 if ((thread->state & ThreadState_AbortRequested) != 0) {
4333 UNLOCK_THREAD (thread);
4334 if (thread->abort_exc == NULL) {
4336 * This might be racy, but it has to be called outside the lock
4337 * since it calls managed code.
4339 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4341 return thread->abort_exc;
4343 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4344 self_suspend_internal (thread);
4347 else if ((thread->state & ThreadState_StopRequested) != 0) {
4348 /* FIXME: do this through the JIT? */
4350 UNLOCK_THREAD (thread);
4352 mono_thread_exit ();
4354 } else if (thread->pending_exception) {
4357 exc = thread->pending_exception;
4358 thread->pending_exception = NULL;
4360 UNLOCK_THREAD (thread);
4362 } else if (thread->thread_interrupt_requested) {
4364 thread->thread_interrupt_requested = FALSE;
4365 UNLOCK_THREAD (thread);
4367 return(mono_get_exception_thread_interrupted ());
4370 UNLOCK_THREAD (thread);
4376 * mono_thread_request_interruption
4378 * A signal handler can call this method to request the interruption of a
4379 * thread. The result of the interruption will depend on the current state of
4380 * the thread. If the result is an exception that needs to be throw, it is
4381 * provided as return value.
4384 mono_thread_request_interruption (gboolean running_managed)
4386 MonoInternalThread *thread = mono_thread_internal_current ();
4388 /* The thread may already be stopping */
4393 if (thread->interrupt_on_stop &&
4394 thread->state & ThreadState_StopRequested &&
4395 thread->state & ThreadState_Background)
4399 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4401 InterlockedIncrement (&thread_interruption_requested);
4403 if (!running_managed || is_running_protected_wrapper ()) {
4404 /* Can't stop while in unmanaged code. Increase the global interruption
4405 request count. When exiting the unmanaged method the count will be
4406 checked and the thread will be interrupted. */
4408 if (mono_thread_notify_pending_exc_fn && !running_managed)
4409 /* The JIT will notify the thread about the interruption */
4410 /* This shouldn't take any locks */
4411 mono_thread_notify_pending_exc_fn (NULL);
4413 /* this will awake the thread if it is in WaitForSingleObject
4415 /* Our implementation of this function ignores the func argument */
4417 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4419 mono_thread_info_self_interrupt ();
4424 return mono_thread_execute_interruption ();
4428 /*This function should be called by a thread after it has exited all of
4429 * its handle blocks at interruption time.*/
4431 mono_thread_resume_interruption (void)
4433 MonoInternalThread *thread = mono_thread_internal_current ();
4434 gboolean still_aborting;
4436 /* The thread may already be stopping */
4440 LOCK_THREAD (thread);
4441 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4442 UNLOCK_THREAD (thread);
4444 /*This can happen if the protected block called Thread::ResetAbort*/
4445 if (!still_aborting)
4448 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4450 InterlockedIncrement (&thread_interruption_requested);
4452 mono_thread_info_self_interrupt ();
4454 return mono_thread_execute_interruption ();
4457 gboolean mono_thread_interruption_requested ()
4459 if (thread_interruption_requested) {
4460 MonoInternalThread *thread = mono_thread_internal_current ();
4461 /* The thread may already be stopping */
4463 return (thread->interruption_requested);
4468 static MonoException*
4469 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4471 MonoInternalThread *thread = mono_thread_internal_current ();
4473 /* The thread may already be stopping */
4477 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4478 MonoException* exc = mono_thread_execute_interruption ();
4486 * Performs the interruption of the current thread, if one has been requested,
4487 * and the thread is not running a protected wrapper.
4488 * Return the exception which needs to be thrown, if any.
4491 mono_thread_interruption_checkpoint (void)
4493 return mono_thread_interruption_checkpoint_request (FALSE);
4497 * Performs the interruption of the current thread, if one has been requested.
4498 * Return the exception which needs to be thrown, if any.
4501 mono_thread_force_interruption_checkpoint_noraise (void)
4503 return mono_thread_interruption_checkpoint_request (TRUE);
4507 * mono_thread_get_and_clear_pending_exception:
4509 * Return any pending exceptions for the current thread and clear it as a side effect.
4512 mono_thread_get_and_clear_pending_exception (void)
4514 MonoInternalThread *thread = mono_thread_internal_current ();
4516 /* The thread may already be stopping */
4520 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4521 return mono_thread_execute_interruption ();
4524 if (thread->pending_exception) {
4525 MonoException *exc = thread->pending_exception;
4527 thread->pending_exception = NULL;
4535 * mono_set_pending_exception:
4537 * Set the pending exception of the current thread to EXC.
4538 * The exception will be thrown when execution returns to managed code.
4541 mono_set_pending_exception (MonoException *exc)
4543 MonoInternalThread *thread = mono_thread_internal_current ();
4545 /* The thread may already be stopping */
4549 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4551 mono_thread_request_interruption (FALSE);
4555 * mono_thread_interruption_request_flag:
4557 * Returns the address of a flag that will be non-zero if an interruption has
4558 * been requested for a thread. The thread to interrupt may not be the current
4559 * thread, so an additional call to mono_thread_interruption_requested() or
4560 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4563 gint32* mono_thread_interruption_request_flag ()
4565 return &thread_interruption_requested;
4569 mono_thread_init_apartment_state (void)
4572 MonoInternalThread* thread = mono_thread_internal_current ();
4574 /* Positive return value indicates success, either
4575 * S_OK if this is first CoInitialize call, or
4576 * S_FALSE if CoInitialize already called, but with same
4577 * threading model. A negative value indicates failure,
4578 * probably due to trying to change the threading model.
4580 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4581 ? COINIT_APARTMENTTHREADED
4582 : COINIT_MULTITHREADED) < 0) {
4583 thread->apartment_state = ThreadApartmentState_Unknown;
4589 mono_thread_cleanup_apartment_state (void)
4592 MonoInternalThread* thread = mono_thread_internal_current ();
4594 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4601 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4603 LOCK_THREAD (thread);
4604 thread->state |= state;
4605 UNLOCK_THREAD (thread);
4609 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4611 LOCK_THREAD (thread);
4612 thread->state &= ~state;
4613 UNLOCK_THREAD (thread);
4617 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4619 gboolean ret = FALSE;
4621 LOCK_THREAD (thread);
4623 if ((thread->state & test) != 0) {
4627 UNLOCK_THREAD (thread);
4632 static gboolean has_tls_get = FALSE;
4635 mono_runtime_set_has_tls_get (gboolean val)
4641 mono_runtime_has_tls_get (void)
4647 self_interrupt_thread (void *_unused)
4649 MonoThreadInfo *info = mono_thread_info_current ();
4650 MonoException *exc = mono_thread_execute_interruption ();
4651 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4652 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. */
4653 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4657 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4661 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4665 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4667 MonoJitInfo **dest = (MonoJitInfo **)data;
4673 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4675 MonoJitInfo *ji = NULL;
4678 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4683 MonoInternalThread *thread;
4684 gboolean install_async_abort;
4685 MonoThreadInfoInterruptToken *interrupt_token;
4688 static SuspendThreadResult
4689 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4691 AbortThreadData *data = (AbortThreadData *)ud;
4692 MonoInternalThread *thread = data->thread;
4693 MonoJitInfo *ji = NULL;
4694 gboolean protected_wrapper;
4695 gboolean running_managed;
4697 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4698 return MonoResumeThread;
4700 /*someone is already interrupting it*/
4701 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4702 return MonoResumeThread;
4704 InterlockedIncrement (&thread_interruption_requested);
4706 ji = mono_thread_info_get_last_managed (info);
4707 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4708 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4710 if (!protected_wrapper && running_managed) {
4711 /*We are in managed code*/
4712 /*Set the thread to call */
4713 if (data->install_async_abort)
4714 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4715 return MonoResumeThread;
4717 if (mono_thread_notify_pending_exc_fn)
4718 /* The JIT will notify the thread about the interruption */
4719 mono_thread_notify_pending_exc_fn (info);
4722 * This will cause waits to be broken.
4723 * It will also prevent the thread from entering a wait, so if the thread returns
4724 * from the wait before it receives the abort signal, it will just spin in the wait
4725 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4728 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4730 return MonoResumeThread;
4735 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4737 AbortThreadData data = { 0 };
4738 data.thread = thread;
4739 data.install_async_abort = install_async_abort;
4742 FIXME this is insanely broken, it doesn't cause interruption to happen
4743 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4745 if (thread == mono_thread_internal_current ()) {
4746 /* Do it synchronously */
4747 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4749 mono_raise_exception (exc);
4751 mono_thread_info_self_interrupt ();
4756 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4757 if (data.interrupt_token)
4758 mono_thread_info_finish_interrupt (data.interrupt_token);
4759 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4763 MonoInternalThread *thread;
4765 MonoThreadInfoInterruptToken *interrupt_token;
4766 } SuspendThreadData;
4768 static SuspendThreadResult
4769 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4771 SuspendThreadData *data = (SuspendThreadData *)ud;
4772 MonoInternalThread *thread = data->thread;
4773 MonoJitInfo *ji = NULL;
4774 gboolean protected_wrapper;
4775 gboolean running_managed;
4777 ji = mono_thread_info_get_last_managed (info);
4778 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4779 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4781 if (running_managed && !protected_wrapper) {
4782 thread->state &= ~ThreadState_SuspendRequested;
4783 thread->state |= ThreadState_Suspended;
4784 return KeepSuspended;
4786 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4787 InterlockedIncrement (&thread_interruption_requested);
4788 if (data->interrupt)
4789 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4791 if (mono_thread_notify_pending_exc_fn && !running_managed)
4792 /* The JIT will notify the thread about the interruption */
4793 mono_thread_notify_pending_exc_fn (info);
4794 return MonoResumeThread;
4799 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4801 LOCK_THREAD (thread);
4802 if (thread == mono_thread_internal_current ()) {
4803 mono_thread_info_begin_self_suspend ();
4804 //XXX replace this with better named functions
4805 thread->state &= ~ThreadState_SuspendRequested;
4806 thread->state |= ThreadState_Suspended;
4807 UNLOCK_THREAD (thread);
4808 mono_thread_info_end_self_suspend ();
4810 SuspendThreadData data = { 0 };
4811 data.thread = thread;
4812 data.interrupt = interrupt;
4814 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4815 if (data.interrupt_token)
4816 mono_thread_info_finish_interrupt (data.interrupt_token);
4817 UNLOCK_THREAD (thread);
4821 /*This is called with @thread synch_cs held and it must release it*/
4823 self_suspend_internal (MonoInternalThread *thread)
4825 mono_thread_info_begin_self_suspend ();
4826 thread->state &= ~ThreadState_SuspendRequested;
4827 thread->state |= ThreadState_Suspended;
4828 UNLOCK_THREAD (thread);
4829 mono_thread_info_end_self_suspend ();
4834 * mono_thread_is_foreign:
4835 * @thread: the thread to query
4837 * This function allows one to determine if a thread was created by the mono runtime and has
4838 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4840 * Returns: true if @thread was not created by the runtime.
4843 mono_thread_is_foreign (MonoThread *thread)
4845 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4846 return info->runtime_thread == FALSE;
4850 * mono_add_joinable_thread:
4852 * Add TID to the list of joinable threads.
4853 * LOCKING: Acquires the threads lock.
4856 mono_threads_add_joinable_thread (gpointer tid)
4860 * We cannot detach from threads because it causes problems like
4861 * 2fd16f60/r114307. So we collect them and join them when
4862 * we have time (in he finalizer thread).
4864 joinable_threads_lock ();
4865 if (!joinable_threads)
4866 joinable_threads = g_hash_table_new (NULL, NULL);
4867 g_hash_table_insert (joinable_threads, tid, tid);
4868 joinable_thread_count ++;
4869 joinable_threads_unlock ();
4871 mono_gc_finalize_notify ();
4876 * mono_threads_join_threads:
4878 * Join all joinable threads. This is called from the finalizer thread.
4879 * LOCKING: Acquires the threads lock.
4882 mono_threads_join_threads (void)
4885 GHashTableIter iter;
4892 if (!joinable_thread_count)
4896 joinable_threads_lock ();
4898 if (g_hash_table_size (joinable_threads)) {
4899 g_hash_table_iter_init (&iter, joinable_threads);
4900 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4901 thread = (pthread_t)tid;
4902 g_hash_table_remove (joinable_threads, key);
4903 joinable_thread_count --;
4906 joinable_threads_unlock ();
4908 if (thread != pthread_self ())
4909 /* This shouldn't block */
4910 pthread_join (thread, NULL);
4921 * Wait for thread TID to exit.
4922 * LOCKING: Acquires the threads lock.
4925 mono_thread_join (gpointer tid)
4929 gboolean found = FALSE;
4931 joinable_threads_lock ();
4932 if (!joinable_threads)
4933 joinable_threads = g_hash_table_new (NULL, NULL);
4934 if (g_hash_table_lookup (joinable_threads, tid)) {
4935 g_hash_table_remove (joinable_threads, tid);
4936 joinable_thread_count --;
4939 joinable_threads_unlock ();
4942 thread = (pthread_t)tid;
4943 pthread_join (thread, NULL);
4948 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4950 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4951 mono_thread_interruption_checkpoint ();
4954 static inline gboolean
4955 is_appdomainunloaded_exception (MonoClass *klass)
4957 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4959 if (!app_domain_unloaded_exception_klass)
4960 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4961 g_assert (app_domain_unloaded_exception_klass);
4963 return klass == app_domain_unloaded_exception_klass;
4966 static inline gboolean
4967 is_threadabort_exception (MonoClass *klass)
4969 return klass == mono_defaults.threadabortexception_class;
4973 mono_thread_internal_unhandled_exception (MonoObject* exc)
4975 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4976 MonoClass *klass = exc->vtable->klass;
4977 if (is_threadabort_exception (klass)) {
4978 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4979 } else if (!is_appdomainunloaded_exception (klass)) {
4980 mono_unhandled_exception (exc);
4981 if (mono_environment_exitcode_get () == 1)
4988 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4990 mono_threads_get_thread_dump (out_threads, out_stack_traces);