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)
574 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
575 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, &error);
576 mono_error_raise_exception (&error); /* FIXME don't raise here */
581 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
583 MonoThread *thread = create_thread_object (domain);
584 MONO_OBJECT_SETREF (thread, internal_thread, internal);
588 static MonoInternalThread*
589 create_internal_thread (void)
592 MonoInternalThread *thread;
595 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
596 thread = (MonoInternalThread*)mono_object_new_mature (vt, &error);
597 mono_error_raise_exception (&error); /* FIXME don't raise here */
599 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
600 mono_coop_mutex_init_recursive (thread->synch_cs);
602 thread->apartment_state = ThreadApartmentState_Unknown;
603 thread->managed_id = get_next_managed_thread_id ();
604 if (mono_gc_is_moving ()) {
605 thread->thread_pinning_ref = thread;
606 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
613 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
615 MonoDomain *domain = mono_get_root_domain ();
617 if (!candidate || candidate->obj.vtable->domain != domain)
618 candidate = new_thread_with_internal (domain, thread);
619 set_current_thread_for_domain (domain, thread, candidate);
620 g_assert (!thread->root_domain_thread);
621 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
624 static guint32 WINAPI start_wrapper_internal(void *data)
626 MonoThreadInfo *info;
627 StartInfo *start_info = (StartInfo *)data;
628 guint32 (*start_func)(void *);
632 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
635 MonoInternalThread *internal = start_info->obj->internal_thread;
636 MonoObject *start_delegate = start_info->delegate;
637 MonoDomain *domain = start_info->obj->obj.vtable->domain;
639 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
641 /* We can be sure start_info->obj->tid and
642 * start_info->obj->handle have been set, because the thread
643 * was created suspended, and these values were set before the
647 info = mono_thread_info_current ();
649 internal->thread_info = info;
650 internal->small_id = info->small_id;
654 SET_CURRENT_OBJECT (internal);
656 /* Every thread references the appdomain which created it */
657 mono_thread_push_appdomain_ref (domain);
659 if (!mono_domain_set (domain, FALSE)) {
660 /* No point in raising an appdomain_unloaded exception here */
661 /* FIXME: Cleanup here */
662 mono_thread_pop_appdomain_ref ();
666 start_func = start_info->func;
667 start_arg = start_info->obj->start_obj;
669 start_arg = start_info->start_arg;
671 /* We have to do this here because mono_thread_new_init()
672 requires that root_domain_thread is set up. */
673 thread_adjust_static_data (internal);
674 init_root_domain_thread (internal, start_info->obj);
676 /* This MUST be called before any managed code can be
677 * executed, as it calls the callback function that (for the
678 * jit) sets the lmf marker.
680 mono_thread_new_init (tid, &tid, start_func);
681 internal->stack_ptr = &tid;
682 if (domain != mono_get_root_domain ())
683 set_current_thread_for_domain (domain, internal, start_info->obj);
685 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
687 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
689 /* On 2.0 profile (and higher), set explicitly since state might have been
691 if (internal->apartment_state == ThreadApartmentState_Unknown)
692 internal->apartment_state = ThreadApartmentState_MTA;
694 mono_thread_init_apartment_state ();
696 if(internal->start_notify!=NULL) {
697 /* Let the thread that called Start() know we're
700 ReleaseSemaphore (internal->start_notify, 1, NULL);
704 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
708 * Call this after calling start_notify, since the profiler callback might want
709 * to lock the thread, and the lock is held by thread_start () which waits for
712 mono_profiler_thread_start (tid);
714 /* if the name was set before starting, we didn't invoke the profiler callback */
715 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
716 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
717 mono_profiler_thread_name (internal->tid, tname);
720 /* start_func is set only for unmanaged start functions */
722 start_func (start_arg);
725 g_assert (start_delegate != NULL);
726 args [0] = start_arg;
727 /* we may want to handle the exception here. See comment below on unhandled exceptions */
728 mono_runtime_delegate_invoke (start_delegate, args, NULL);
731 /* If the thread calls ExitThread at all, this remaining code
732 * will not be executed, but the main thread will eventually
733 * call thread_cleanup() on this thread's behalf.
736 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
738 /* Do any cleanup needed for apartment state. This
739 * cannot be done in thread_cleanup since thread_cleanup could be
740 * called for a thread other than the current thread.
741 * mono_thread_cleanup_apartment_state cleans up apartment
742 * for the current thead */
743 mono_thread_cleanup_apartment_state ();
745 thread_cleanup (internal);
749 /* Remove the reference to the thread object in the TLS data,
750 * so the thread object can be finalized. This won't be
751 * reached if the thread threw an uncaught exception, so those
752 * thread handles will stay referenced :-( (This is due to
753 * missing support for scanning thread-specific data in the
754 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
757 SET_CURRENT_OBJECT (NULL);
762 static guint32 WINAPI start_wrapper(void *data)
766 /* Avoid scanning the frames above this frame during a GC */
767 mono_gc_set_stack_end ((void*)&dummy);
769 return start_wrapper_internal (data);
775 * Common thread creation code.
776 * LOCKING: Acquires the threads lock.
779 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
780 gboolean throw_on_failure)
782 HANDLE thread_handle;
783 MonoNativeThreadId tid;
784 guint32 create_flags;
787 * Join joinable threads to prevent running out of threads since the finalizer
788 * thread might be blocked/backlogged.
790 mono_threads_join_threads ();
792 mono_threads_lock ();
795 mono_threads_unlock ();
798 if (threads_starting_up == NULL) {
799 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
800 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
802 mono_g_hash_table_insert (threads_starting_up, thread, thread);
803 mono_threads_unlock ();
805 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
806 if (!internal->start_notify) {
807 mono_threads_lock ();
808 mono_g_hash_table_remove (threads_starting_up, thread);
809 mono_threads_unlock ();
810 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
816 stack_size = default_stacksize_for_thread (internal);
818 /* Create suspended, so we can do some housekeeping before the thread
821 create_flags = CREATE_SUSPENDED;
823 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
824 stack_size, create_flags, &tid);
826 if (thread_handle == NULL) {
827 /* The thread couldn't be created, so throw an exception */
828 mono_threads_lock ();
829 mono_g_hash_table_remove (threads_starting_up, thread);
830 mono_threads_unlock ();
832 if (throw_on_failure)
833 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
835 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
838 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
840 internal->handle = thread_handle;
841 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
843 internal->threadpool_thread = threadpool_thread;
844 if (threadpool_thread)
845 mono_thread_set_state (internal, ThreadState_Background);
847 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
849 /* Only store the handle when the thread is about to be
850 * launched, to avoid the main thread deadlocking while trying
851 * to clean up a thread that will never be signalled.
853 if (!handle_store (thread, FALSE))
856 mono_thread_info_resume (tid);
858 if (internal->start_notify) {
860 * Wait for the thread to set up its TLS data etc, so
861 * theres no potential race condition if someone tries
862 * to look up the data believing the thread has
865 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));
867 MONO_PREPARE_BLOCKING;
868 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
869 MONO_FINISH_BLOCKING;
871 CloseHandle (internal->start_notify);
872 internal->start_notify = NULL;
875 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));
880 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
882 if (mono_thread_start_cb) {
883 mono_thread_start_cb (tid, stack_start, func);
887 void mono_threads_set_default_stacksize (guint32 stacksize)
889 default_stacksize = stacksize;
892 guint32 mono_threads_get_default_stacksize (void)
894 return default_stacksize;
898 * mono_thread_create_internal:
900 * ARG should not be a GC reference.
903 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
906 MonoInternalThread *internal;
907 StartInfo *start_info;
910 thread = create_thread_object (domain);
911 internal = create_internal_thread ();
912 MONO_OBJECT_SETREF (thread, internal_thread, internal);
914 start_info = g_new0 (StartInfo, 1);
915 start_info->func = (guint32 (*)(void *))func;
916 start_info->obj = thread;
917 start_info->start_arg = arg;
919 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
923 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
924 #ifndef MONO_CROSS_COMPILE
925 if (mono_check_corlib_version () == NULL)
926 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
933 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
935 mono_thread_create_internal (domain, func, arg, FALSE, 0);
939 mono_thread_attach (MonoDomain *domain)
941 return mono_thread_attach_full (domain, FALSE);
945 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
947 MonoThreadInfo *info;
948 MonoInternalThread *thread;
949 MonoThread *current_thread;
950 HANDLE thread_handle;
951 MonoNativeThreadId tid;
953 if ((thread = mono_thread_internal_current ())) {
954 if (domain != mono_domain_get ())
955 mono_domain_set (domain, TRUE);
956 /* Already attached */
957 return mono_thread_current ();
960 if (!mono_gc_register_thread (&domain)) {
961 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 ());
964 thread = create_internal_thread ();
966 thread_handle = mono_thread_info_open_handle ();
967 g_assert (thread_handle);
969 tid=mono_native_thread_id_get ();
971 thread->handle = thread_handle;
972 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
973 thread->stack_ptr = &tid;
975 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
977 info = mono_thread_info_current ();
979 thread->thread_info = info;
980 thread->small_id = info->small_id;
982 current_thread = new_thread_with_internal (domain, thread);
984 if (!handle_store (current_thread, force_attach)) {
985 /* Mono is shutting down, so just wait for the end */
987 mono_thread_info_sleep (10000, NULL);
990 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
992 SET_CURRENT_OBJECT (thread);
993 mono_domain_set (domain, TRUE);
995 thread_adjust_static_data (thread);
997 init_root_domain_thread (thread, current_thread);
998 if (domain != mono_get_root_domain ())
999 set_current_thread_for_domain (domain, thread, current_thread);
1002 if (mono_thread_attach_cb) {
1006 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1009 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1011 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1014 // FIXME: Need a separate callback
1015 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1017 return current_thread;
1021 mono_thread_detach_internal (MonoInternalThread *thread)
1023 g_return_if_fail (thread != NULL);
1025 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1027 thread_cleanup (thread);
1029 SET_CURRENT_OBJECT (NULL);
1030 mono_domain_unset ();
1032 /* Don't need to CloseHandle this thread, even though we took a
1033 * reference in mono_thread_attach (), because the GC will do it
1034 * when the Thread object is finalised.
1039 mono_thread_detach (MonoThread *thread)
1042 mono_thread_detach_internal (thread->internal_thread);
1046 * mono_thread_detach_if_exiting:
1048 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1049 * This should be used at the end of embedding code which calls into managed code, and which
1050 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1053 mono_thread_detach_if_exiting (void)
1055 if (mono_thread_info_is_exiting ()) {
1056 MonoInternalThread *thread;
1058 thread = mono_thread_internal_current ();
1060 mono_thread_detach_internal (thread);
1061 mono_thread_info_detach ();
1069 MonoInternalThread *thread = mono_thread_internal_current ();
1071 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1073 thread_cleanup (thread);
1074 SET_CURRENT_OBJECT (NULL);
1075 mono_domain_unset ();
1077 /* we could add a callback here for embedders to use. */
1078 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1079 exit (mono_environment_exitcode_get ());
1080 mono_thread_info_exit ();
1084 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1086 MonoInternalThread *internal = create_internal_thread ();
1088 internal->state = ThreadState_Unstarted;
1090 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1094 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1097 StartInfo *start_info;
1098 MonoInternalThread *internal;
1101 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1103 if (!this_obj->internal_thread)
1104 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1105 internal = this_obj->internal_thread;
1107 LOCK_THREAD (internal);
1109 if ((internal->state & ThreadState_Unstarted) == 0) {
1110 UNLOCK_THREAD (internal);
1111 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1115 if ((internal->state & ThreadState_Aborted) != 0) {
1116 UNLOCK_THREAD (internal);
1119 /* This is freed in start_wrapper */
1120 start_info = g_new0 (StartInfo, 1);
1121 start_info->func = NULL;
1122 start_info->start_arg = NULL;
1123 start_info->delegate = start;
1124 start_info->obj = this_obj;
1125 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1127 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1129 UNLOCK_THREAD (internal);
1133 internal->state &= ~ThreadState_Unstarted;
1135 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1137 UNLOCK_THREAD (internal);
1138 return internal->handle;
1142 * This is called from the finalizer of the internal thread object.
1145 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1147 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1150 * Since threads keep a reference to their thread object while running, by the time this function is called,
1151 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1152 * when thread_cleanup () can be called after this.
1155 CloseHandle (thread);
1157 if (this_obj->synch_cs) {
1158 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1159 this_obj->synch_cs = NULL;
1160 mono_coop_mutex_destroy (synch_cs);
1164 if (this_obj->name) {
1165 void *name = this_obj->name;
1166 this_obj->name = NULL;
1172 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1175 MonoInternalThread *thread = mono_thread_internal_current ();
1177 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1179 mono_thread_current_check_pending_interrupt ();
1182 gboolean alerted = FALSE;
1184 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1186 res = mono_thread_info_sleep (ms, &alerted);
1188 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1191 MonoException* exc = mono_thread_execute_interruption ();
1193 mono_raise_exception (exc);
1205 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1210 ves_icall_System_Threading_Thread_GetDomainID (void)
1212 return mono_domain_get()->domain_id;
1216 ves_icall_System_Threading_Thread_Yield (void)
1218 return mono_thread_info_yield ();
1222 * mono_thread_get_name:
1224 * Return the name of the thread. NAME_LEN is set to the length of the name.
1225 * Return NULL if the thread has no name. The returned memory is owned by the
1229 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1233 LOCK_THREAD (this_obj);
1235 if (!this_obj->name) {
1239 *name_len = this_obj->name_len;
1240 res = g_new (gunichar2, this_obj->name_len);
1241 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1244 UNLOCK_THREAD (this_obj);
1250 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1254 LOCK_THREAD (this_obj);
1256 if (!this_obj->name)
1259 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1261 UNLOCK_THREAD (this_obj);
1267 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1269 LOCK_THREAD (this_obj);
1271 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1272 UNLOCK_THREAD (this_obj);
1274 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1277 if (this_obj->name) {
1278 g_free (this_obj->name);
1279 this_obj->name_len = 0;
1282 this_obj->name = g_new (gunichar2, mono_string_length (name));
1283 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1284 this_obj->name_len = mono_string_length (name);
1287 this_obj->name = NULL;
1290 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1292 UNLOCK_THREAD (this_obj);
1294 if (this_obj->name && this_obj->tid) {
1295 char *tname = mono_string_to_utf8 (name);
1296 mono_profiler_thread_name (this_obj->tid, tname);
1297 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1303 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1305 mono_thread_set_name_internal (this_obj, name, TRUE);
1309 * ves_icall_System_Threading_Thread_GetPriority_internal:
1310 * @param this_obj: The MonoInternalThread on which to operate.
1312 * Gets the priority of the given thread.
1313 * @return: The priority of the given thread.
1316 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1319 MonoInternalThread *internal = this_obj->internal_thread;
1321 LOCK_THREAD (internal);
1322 priority = GetThreadPriority (internal->handle) + 2;
1323 UNLOCK_THREAD (internal);
1328 * ves_icall_System_Threading_Thread_SetPriority_internal:
1329 * @param this_obj: The MonoInternalThread on which to operate.
1330 * @param priority: The priority to set.
1332 * Sets the priority of the given thread.
1335 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1337 MonoInternalThread *internal = this_obj->internal_thread;
1339 LOCK_THREAD (internal);
1340 SetThreadPriority (internal->handle, priority - 2);
1341 UNLOCK_THREAD (internal);
1344 /* If the array is already in the requested domain, we just return it,
1345 otherwise we return a copy in that domain. */
1347 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1354 if (mono_object_domain (arr) == domain)
1357 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1358 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1363 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1365 return byte_array_to_domain (arr, mono_get_root_domain ());
1369 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1371 return byte_array_to_domain (arr, mono_domain_get ());
1375 mono_thread_current (void)
1377 MonoDomain *domain = mono_domain_get ();
1378 MonoInternalThread *internal = mono_thread_internal_current ();
1379 MonoThread **current_thread_ptr;
1381 g_assert (internal);
1382 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1384 if (!*current_thread_ptr) {
1385 g_assert (domain != mono_get_root_domain ());
1386 *current_thread_ptr = new_thread_with_internal (domain, internal);
1388 return *current_thread_ptr;
1391 /* Return the thread object belonging to INTERNAL in the current domain */
1393 mono_thread_current_for_thread (MonoInternalThread *internal)
1395 MonoDomain *domain = mono_domain_get ();
1396 MonoThread **current_thread_ptr;
1398 g_assert (internal);
1399 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1401 if (!*current_thread_ptr) {
1402 g_assert (domain != mono_get_root_domain ());
1403 *current_thread_ptr = new_thread_with_internal (domain, internal);
1405 return *current_thread_ptr;
1409 mono_thread_internal_current (void)
1411 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1412 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1417 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1419 MonoInternalThread *thread = this_obj->internal_thread;
1420 HANDLE handle = thread->handle;
1421 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1424 mono_thread_current_check_pending_interrupt ();
1426 LOCK_THREAD (thread);
1428 if ((thread->state & ThreadState_Unstarted) != 0) {
1429 UNLOCK_THREAD (thread);
1431 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1435 UNLOCK_THREAD (thread);
1440 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1442 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1444 MONO_PREPARE_BLOCKING;
1445 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1446 MONO_FINISH_BLOCKING;
1448 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1450 if(ret==WAIT_OBJECT_0) {
1451 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1456 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1462 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1470 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1472 MONO_PREPARE_BLOCKING;
1474 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1476 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1477 MONO_FINISH_BLOCKING;
1479 if (ret != WAIT_IO_COMPLETION)
1482 exc = mono_thread_execute_interruption ();
1484 mono_raise_exception (exc);
1489 /* Re-calculate ms according to the time passed */
1490 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1491 if (diff_ms >= ms) {
1495 wait = ms - diff_ms;
1501 /* FIXME: exitContext isnt documented */
1502 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1508 MonoObject *waitHandle;
1509 MonoInternalThread *thread = mono_thread_internal_current ();
1511 /* Do this WaitSleepJoin check before creating objects */
1512 mono_thread_current_check_pending_interrupt ();
1514 /* We fail in managed if the array has more than 64 elements */
1515 numhandles = (guint32)mono_array_length(mono_handles);
1516 handles = g_new0(HANDLE, numhandles);
1518 for(i = 0; i < numhandles; i++) {
1519 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1520 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1527 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1529 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1531 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1535 if(ret==WAIT_FAILED) {
1536 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1538 } else if(ret==WAIT_TIMEOUT) {
1539 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1546 /* FIXME: exitContext isnt documented */
1547 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1549 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1550 uintptr_t numhandles;
1553 MonoObject *waitHandle;
1554 MonoInternalThread *thread = mono_thread_internal_current ();
1556 /* Do this WaitSleepJoin check before creating objects */
1557 mono_thread_current_check_pending_interrupt ();
1559 numhandles = mono_array_length(mono_handles);
1560 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1563 for(i = 0; i < numhandles; i++) {
1564 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1565 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1572 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1574 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1576 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1578 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1581 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1583 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1584 return ret - WAIT_OBJECT_0;
1586 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1587 return ret - WAIT_ABANDONED_0;
1594 /* FIXME: exitContext isnt documented */
1595 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1598 MonoInternalThread *thread = mono_thread_internal_current ();
1600 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1606 mono_thread_current_check_pending_interrupt ();
1608 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1610 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1612 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1614 if(ret==WAIT_FAILED) {
1615 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1617 } else if(ret==WAIT_TIMEOUT) {
1618 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1626 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1629 MonoInternalThread *thread = mono_thread_internal_current ();
1634 mono_thread_current_check_pending_interrupt ();
1636 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1638 MONO_PREPARE_BLOCKING;
1639 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1640 MONO_FINISH_BLOCKING;
1642 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1644 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1647 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1654 mutex = CreateMutex (NULL, owned, NULL);
1656 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1658 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1666 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1667 return(ReleaseMutex (handle));
1670 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1676 *error = ERROR_SUCCESS;
1678 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1680 *error = GetLastError ();
1687 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1694 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1696 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1697 mono_string_chars (name));
1699 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1707 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1711 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1716 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1720 *error = ERROR_SUCCESS;
1722 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1724 *error = GetLastError ();
1730 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1737 event = CreateEvent (NULL, manual, initial, NULL);
1739 event = CreateEvent (NULL, manual, initial,
1740 mono_string_chars (name));
1742 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1750 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1751 return (SetEvent(handle));
1754 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1755 return (ResetEvent(handle));
1759 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1760 CloseHandle (handle);
1763 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1769 *error = ERROR_SUCCESS;
1771 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1773 *error = GetLastError ();
1779 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1781 return InterlockedIncrement (location);
1784 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1786 #if SIZEOF_VOID_P == 4
1787 if (G_UNLIKELY ((size_t)location & 0x7)) {
1789 mono_interlocked_lock ();
1792 mono_interlocked_unlock ();
1796 return InterlockedIncrement64 (location);
1799 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1801 return InterlockedDecrement(location);
1804 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1806 #if SIZEOF_VOID_P == 4
1807 if (G_UNLIKELY ((size_t)location & 0x7)) {
1809 mono_interlocked_lock ();
1812 mono_interlocked_unlock ();
1816 return InterlockedDecrement64 (location);
1819 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1821 return InterlockedExchange(location, value);
1824 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1827 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1828 mono_gc_wbarrier_generic_nostore (location);
1832 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1834 return InterlockedExchangePointer(location, value);
1837 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1839 IntFloatUnion val, ret;
1842 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1848 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1850 #if SIZEOF_VOID_P == 4
1851 if (G_UNLIKELY ((size_t)location & 0x7)) {
1853 mono_interlocked_lock ();
1856 mono_interlocked_unlock ();
1860 return InterlockedExchange64 (location, value);
1864 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1866 LongDoubleUnion val, ret;
1869 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1874 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1876 return InterlockedCompareExchange(location, value, comparand);
1879 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1881 gint32 r = InterlockedCompareExchange(location, value, comparand);
1882 *success = r == comparand;
1886 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1889 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1890 mono_gc_wbarrier_generic_nostore (location);
1894 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1896 return InterlockedCompareExchangePointer(location, value, comparand);
1899 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1901 IntFloatUnion val, ret, cmp;
1904 cmp.fval = comparand;
1905 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1911 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1913 #if SIZEOF_VOID_P == 8
1914 LongDoubleUnion val, comp, ret;
1917 comp.fval = comparand;
1918 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1924 mono_interlocked_lock ();
1926 if (old == comparand)
1928 mono_interlocked_unlock ();
1935 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1937 #if SIZEOF_VOID_P == 4
1938 if (G_UNLIKELY ((size_t)location & 0x7)) {
1940 mono_interlocked_lock ();
1942 if (old == comparand)
1944 mono_interlocked_unlock ();
1948 return InterlockedCompareExchange64 (location, value, comparand);
1952 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1955 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
1956 mono_gc_wbarrier_generic_nostore (location);
1961 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1964 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
1965 mono_gc_wbarrier_generic_nostore (location);
1970 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1972 return InterlockedAdd (location, value);
1976 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1978 #if SIZEOF_VOID_P == 4
1979 if (G_UNLIKELY ((size_t)location & 0x7)) {
1981 mono_interlocked_lock ();
1984 mono_interlocked_unlock ();
1988 return InterlockedAdd64 (location, value);
1992 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1994 #if SIZEOF_VOID_P == 4
1995 if (G_UNLIKELY ((size_t)location & 0x7)) {
1997 mono_interlocked_lock ();
1999 mono_interlocked_unlock ();
2003 return InterlockedRead64 (location);
2007 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2009 mono_memory_barrier ();
2013 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2015 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2017 if (state & ThreadState_Background) {
2018 /* If the thread changes the background mode, the main thread has to
2019 * be notified, since it has to rebuild the list of threads to
2022 SetEvent (background_change_event);
2027 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2029 mono_thread_set_state (this_obj, (MonoThreadState)state);
2031 if (state & ThreadState_Background) {
2032 /* If the thread changes the background mode, the main thread has to
2033 * be notified, since it has to rebuild the list of threads to
2036 SetEvent (background_change_event);
2041 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2045 LOCK_THREAD (this_obj);
2047 state = this_obj->state;
2049 UNLOCK_THREAD (this_obj);
2054 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2056 MonoInternalThread *current;
2058 MonoInternalThread *thread = this_obj->internal_thread;
2060 LOCK_THREAD (thread);
2062 current = mono_thread_internal_current ();
2064 thread->thread_interrupt_requested = TRUE;
2065 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2067 UNLOCK_THREAD (thread);
2070 abort_thread_internal (thread, TRUE, FALSE);
2074 void mono_thread_current_check_pending_interrupt ()
2076 MonoInternalThread *thread = mono_thread_internal_current ();
2077 gboolean throw_ = FALSE;
2079 LOCK_THREAD (thread);
2081 if (thread->thread_interrupt_requested) {
2083 thread->thread_interrupt_requested = FALSE;
2086 UNLOCK_THREAD (thread);
2089 mono_raise_exception (mono_get_exception_thread_interrupted ());
2094 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2096 LOCK_THREAD (thread);
2098 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2099 (thread->state & ThreadState_StopRequested) != 0 ||
2100 (thread->state & ThreadState_Stopped) != 0)
2102 UNLOCK_THREAD (thread);
2106 if ((thread->state & ThreadState_Unstarted) != 0) {
2107 thread->state |= ThreadState_Aborted;
2108 UNLOCK_THREAD (thread);
2112 thread->state |= ThreadState_AbortRequested;
2113 if (thread->abort_state_handle)
2114 mono_gchandle_free (thread->abort_state_handle);
2116 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2117 g_assert (thread->abort_state_handle);
2119 thread->abort_state_handle = 0;
2121 thread->abort_exc = NULL;
2123 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));
2125 /* During shutdown, we can't wait for other threads */
2127 /* Make sure the thread is awake */
2128 mono_thread_resume (thread);
2130 UNLOCK_THREAD (thread);
2132 abort_thread_internal (thread, TRUE, TRUE);
2136 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2138 MonoInternalThread *thread = mono_thread_internal_current ();
2139 gboolean was_aborting;
2141 LOCK_THREAD (thread);
2142 was_aborting = thread->state & ThreadState_AbortRequested;
2143 thread->state &= ~ThreadState_AbortRequested;
2144 UNLOCK_THREAD (thread);
2146 if (!was_aborting) {
2147 const char *msg = "Unable to reset abort because no abort was requested";
2148 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2151 thread->abort_exc = NULL;
2152 if (thread->abort_state_handle) {
2153 mono_gchandle_free (thread->abort_state_handle);
2154 /* This is actually not necessary - the handle
2155 only counts if the exception is set */
2156 thread->abort_state_handle = 0;
2161 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2163 LOCK_THREAD (thread);
2165 thread->state &= ~ThreadState_AbortRequested;
2167 if (thread->abort_exc) {
2168 thread->abort_exc = NULL;
2169 if (thread->abort_state_handle) {
2170 mono_gchandle_free (thread->abort_state_handle);
2171 /* This is actually not necessary - the handle
2172 only counts if the exception is set */
2173 thread->abort_state_handle = 0;
2177 UNLOCK_THREAD (thread);
2181 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2183 MonoInternalThread *thread = this_obj->internal_thread;
2184 MonoObject *state, *deserialized = NULL, *exc;
2187 if (!thread->abort_state_handle)
2190 state = mono_gchandle_get_target (thread->abort_state_handle);
2193 domain = mono_domain_get ();
2194 if (mono_object_domain (state) == domain)
2197 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2199 if (!deserialized) {
2200 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2202 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2203 mono_set_pending_exception (invalid_op_exc);
2207 return deserialized;
2211 mono_thread_suspend (MonoInternalThread *thread)
2213 LOCK_THREAD (thread);
2215 if ((thread->state & ThreadState_Unstarted) != 0 ||
2216 (thread->state & ThreadState_Aborted) != 0 ||
2217 (thread->state & ThreadState_Stopped) != 0)
2219 UNLOCK_THREAD (thread);
2223 if ((thread->state & ThreadState_Suspended) != 0 ||
2224 (thread->state & ThreadState_SuspendRequested) != 0 ||
2225 (thread->state & ThreadState_StopRequested) != 0)
2227 UNLOCK_THREAD (thread);
2231 thread->state |= ThreadState_SuspendRequested;
2233 UNLOCK_THREAD (thread);
2235 suspend_thread_internal (thread, FALSE);
2240 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2242 if (!mono_thread_suspend (this_obj->internal_thread)) {
2243 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2248 /* LOCKING: LOCK_THREAD(thread) must be held */
2250 mono_thread_resume (MonoInternalThread *thread)
2252 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2253 thread->state &= ~ThreadState_SuspendRequested;
2257 if ((thread->state & ThreadState_Suspended) == 0 ||
2258 (thread->state & ThreadState_Unstarted) != 0 ||
2259 (thread->state & ThreadState_Aborted) != 0 ||
2260 (thread->state & ThreadState_Stopped) != 0)
2265 UNLOCK_THREAD (thread);
2267 /* Awake the thread */
2268 if (!mono_thread_info_resume (thread_get_tid (thread)))
2271 LOCK_THREAD (thread);
2273 thread->state &= ~ThreadState_Suspended;
2279 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2281 if (!thread->internal_thread) {
2282 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2284 LOCK_THREAD (thread->internal_thread);
2285 if (!mono_thread_resume (thread->internal_thread))
2286 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2287 UNLOCK_THREAD (thread->internal_thread);
2292 mono_threads_is_critical_method (MonoMethod *method)
2294 switch (method->wrapper_type) {
2295 case MONO_WRAPPER_RUNTIME_INVOKE:
2296 case MONO_WRAPPER_XDOMAIN_INVOKE:
2297 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2304 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2309 if (mono_threads_is_critical_method (m)) {
2310 *((gboolean*)data) = TRUE;
2317 is_running_protected_wrapper (void)
2319 gboolean found = FALSE;
2320 mono_stack_walk (find_wrapper, &found);
2324 void mono_thread_internal_stop (MonoInternalThread *thread)
2326 LOCK_THREAD (thread);
2328 if ((thread->state & ThreadState_StopRequested) != 0 ||
2329 (thread->state & ThreadState_Stopped) != 0)
2331 UNLOCK_THREAD (thread);
2335 /* Make sure the thread is awake */
2336 mono_thread_resume (thread);
2338 thread->state |= ThreadState_StopRequested;
2339 thread->state &= ~ThreadState_AbortRequested;
2341 UNLOCK_THREAD (thread);
2343 abort_thread_internal (thread, TRUE, TRUE);
2346 void mono_thread_stop (MonoThread *thread)
2348 mono_thread_internal_stop (thread->internal_thread);
2352 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2354 gint8 tmp = *(volatile gint8 *)ptr;
2355 mono_memory_barrier ();
2360 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2362 gint16 tmp = *(volatile gint16 *)ptr;
2363 mono_memory_barrier ();
2368 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2370 gint32 tmp = *(volatile gint32 *)ptr;
2371 mono_memory_barrier ();
2376 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2378 gint64 tmp = *(volatile gint64 *)ptr;
2379 mono_memory_barrier ();
2384 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2386 volatile void *tmp = *(volatile void **)ptr;
2387 mono_memory_barrier ();
2388 return (void *) tmp;
2392 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2394 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2395 mono_memory_barrier ();
2396 return (MonoObject *) tmp;
2400 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2402 double tmp = *(volatile double *)ptr;
2403 mono_memory_barrier ();
2408 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2410 float tmp = *(volatile float *)ptr;
2411 mono_memory_barrier ();
2416 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2418 return InterlockedRead8 ((volatile gint8 *)ptr);
2422 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2424 return InterlockedRead16 ((volatile gint16 *)ptr);
2428 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2430 return InterlockedRead ((volatile gint32 *)ptr);
2434 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2436 #if SIZEOF_VOID_P == 4
2437 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2439 mono_interlocked_lock ();
2440 val = *(gint64*)ptr;
2441 mono_interlocked_unlock ();
2445 return InterlockedRead64 ((volatile gint64 *)ptr);
2449 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2451 return InterlockedReadPointer ((volatile gpointer *)ptr);
2455 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2459 #if SIZEOF_VOID_P == 4
2460 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2462 mono_interlocked_lock ();
2463 val = *(double*)ptr;
2464 mono_interlocked_unlock ();
2469 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2475 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2479 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2485 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2487 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2491 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2493 mono_memory_barrier ();
2494 *(volatile gint8 *)ptr = value;
2498 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2500 mono_memory_barrier ();
2501 *(volatile gint16 *)ptr = value;
2505 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2507 mono_memory_barrier ();
2508 *(volatile gint32 *)ptr = value;
2512 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2514 mono_memory_barrier ();
2515 *(volatile gint64 *)ptr = value;
2519 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2521 mono_memory_barrier ();
2522 *(volatile void **)ptr = value;
2526 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2528 mono_memory_barrier ();
2529 mono_gc_wbarrier_generic_store (ptr, value);
2533 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2535 mono_memory_barrier ();
2536 *(volatile double *)ptr = value;
2540 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2542 mono_memory_barrier ();
2543 *(volatile float *)ptr = value;
2547 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2549 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2553 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2555 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2559 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2561 InterlockedWrite ((volatile gint32 *)ptr, value);
2565 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2567 #if SIZEOF_VOID_P == 4
2568 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2569 mono_interlocked_lock ();
2570 *(gint64*)ptr = value;
2571 mono_interlocked_unlock ();
2576 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2580 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2582 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2586 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2590 #if SIZEOF_VOID_P == 4
2591 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2592 mono_interlocked_lock ();
2593 *(double*)ptr = value;
2594 mono_interlocked_unlock ();
2601 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2605 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2611 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2615 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2617 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2621 free_context (void *user_data)
2623 ContextStaticData *data = user_data;
2625 mono_threads_lock ();
2628 * There is no guarantee that, by the point this reference queue callback
2629 * has been invoked, the GC handle associated with the object will fail to
2630 * resolve as one might expect. So if we don't free and remove the GC
2631 * handle here, free_context_static_data_helper () could end up resolving
2632 * a GC handle to an actually-dead context which would contain a pointer
2633 * to an already-freed static data segment, resulting in a crash when
2636 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2638 mono_threads_unlock ();
2640 mono_gchandle_free (data->gc_handle);
2641 mono_free_static_data (data->static_data);
2646 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2648 mono_threads_lock ();
2650 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2653 contexts = g_hash_table_new (NULL, NULL);
2656 context_queue = mono_gc_reference_queue_new (free_context);
2658 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2659 g_hash_table_insert (contexts, gch, gch);
2662 * We use this intermediate structure to contain a duplicate pointer to
2663 * the static data because we can't rely on being able to resolve the GC
2664 * handle in the reference queue callback.
2666 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2667 data->gc_handle = GPOINTER_TO_UINT (gch);
2670 context_adjust_static_data (ctx);
2671 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2673 mono_threads_unlock ();
2675 mono_profiler_context_loaded (ctx);
2679 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2682 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2683 * cleanup in exceptional circumstances, we don't actually do any
2684 * cleanup work here. We instead do this via a reference queue.
2687 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2689 mono_profiler_context_unloaded (ctx);
2693 mono_thread_init_tls (void)
2695 MONO_FAST_TLS_INIT (tls_current_object);
2696 mono_native_tls_alloc (¤t_object_key, NULL);
2699 void mono_thread_init (MonoThreadStartCB start_cb,
2700 MonoThreadAttachCB attach_cb)
2702 mono_coop_mutex_init_recursive (&threads_mutex);
2704 mono_os_mutex_init_recursive(&interlocked_mutex);
2705 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2707 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2708 g_assert(background_change_event != NULL);
2710 mono_init_static_data_info (&thread_static_info);
2711 mono_init_static_data_info (&context_static_info);
2713 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2715 mono_thread_start_cb = start_cb;
2716 mono_thread_attach_cb = attach_cb;
2718 /* Get a pseudo handle to the current process. This is just a
2719 * kludge so that wapi can build a process handle if needed.
2720 * As a pseudo handle is returned, we don't need to clean
2723 GetCurrentProcess ();
2726 void mono_thread_cleanup (void)
2728 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2729 MonoThreadInfo *info;
2731 /* The main thread must abandon any held mutexes (particularly
2732 * important for named mutexes as they are shared across
2733 * processes, see bug 74680.) This will happen when the
2734 * thread exits, but if it's not running in a subthread it
2735 * won't exit in time.
2737 info = mono_thread_info_current ();
2738 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2742 /* This stuff needs more testing, it seems one of these
2743 * critical sections can be locked when mono_thread_cleanup is
2746 mono_coop_mutex_destroy (&threads_mutex);
2747 mono_os_mutex_destroy (&interlocked_mutex);
2748 mono_os_mutex_destroy (&delayed_free_table_mutex);
2749 mono_os_mutex_destroy (&small_id_mutex);
2750 CloseHandle (background_change_event);
2753 mono_native_tls_free (current_object_key);
2757 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2759 mono_thread_cleanup_fn = func;
2763 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2765 thread->internal_thread->manage_callback = func;
2768 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2770 mono_thread_notify_pending_exc_fn = func;
2774 static void print_tids (gpointer key, gpointer value, gpointer user)
2776 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2777 * sizeof(uint) and a cast to uint would overflow
2779 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2780 * print this as a pointer.
2782 g_message ("Waiting for: %p", key);
2787 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2788 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2792 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2796 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2798 MONO_PREPARE_BLOCKING;
2799 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2800 MONO_FINISH_BLOCKING;
2802 if(ret==WAIT_FAILED) {
2803 /* See the comment in build_wait_tids() */
2804 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2808 for(i=0; i<wait->num; i++)
2809 CloseHandle (wait->handles[i]);
2811 if (ret == WAIT_TIMEOUT)
2814 for(i=0; i<wait->num; i++) {
2815 gsize tid = wait->threads[i]->tid;
2818 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2819 * it can still run io-layer etc. code. So wait for it to really exit.
2820 * FIXME: This won't join threads which are not in the joinable_hash yet.
2822 mono_thread_join ((gpointer)tid);
2824 mono_threads_lock ();
2825 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2826 /* This thread must have been killed, because
2827 * it hasn't cleaned itself up. (It's just
2828 * possible that the thread exited before the
2829 * parent thread had a chance to store the
2830 * handle, and now there is another pointer to
2831 * the already-exited thread stored. In this
2832 * case, we'll just get two
2833 * mono_profiler_thread_end() calls for the
2837 mono_threads_unlock ();
2838 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2839 thread_cleanup (wait->threads[i]);
2841 mono_threads_unlock ();
2846 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2848 guint32 i, ret, count;
2850 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2852 /* Add the thread state change event, so it wakes up if a thread changes
2853 * to background mode.
2856 if (count < MAXIMUM_WAIT_OBJECTS) {
2857 wait->handles [count] = background_change_event;
2861 MONO_PREPARE_BLOCKING;
2862 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2863 MONO_FINISH_BLOCKING;
2865 if(ret==WAIT_FAILED) {
2866 /* See the comment in build_wait_tids() */
2867 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2871 for(i=0; i<wait->num; i++)
2872 CloseHandle (wait->handles[i]);
2874 if (ret == WAIT_TIMEOUT)
2877 if (ret < wait->num) {
2878 gsize tid = wait->threads[ret]->tid;
2879 mono_threads_lock ();
2880 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2881 /* See comment in wait_for_tids about thread cleanup */
2882 mono_threads_unlock ();
2883 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2884 thread_cleanup (wait->threads [ret]);
2886 mono_threads_unlock ();
2890 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2892 struct wait_data *wait=(struct wait_data *)user;
2894 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2896 MonoInternalThread *thread=(MonoInternalThread *)value;
2898 /* Ignore background threads, we abort them later */
2899 /* Do not lock here since it is not needed and the caller holds threads_lock */
2900 if (thread->state & ThreadState_Background) {
2901 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2902 return; /* just leave, ignore */
2905 if (mono_gc_is_finalizer_internal_thread (thread)) {
2906 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2910 if (thread == mono_thread_internal_current ()) {
2911 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2915 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2916 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2920 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2921 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2925 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2926 if (handle == NULL) {
2927 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2931 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2932 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2933 wait->handles[wait->num]=handle;
2934 wait->threads[wait->num]=thread;
2937 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2939 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2944 /* Just ignore the rest, we can't do anything with
2951 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2953 struct wait_data *wait=(struct wait_data *)user;
2954 MonoNativeThreadId self = mono_native_thread_id_get ();
2955 MonoInternalThread *thread = (MonoInternalThread *)value;
2958 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2961 /* The finalizer thread is not a background thread */
2962 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
2963 && (thread->state & ThreadState_Background) != 0
2964 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
2966 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2970 /* printf ("A: %d\n", wait->num); */
2971 wait->handles[wait->num]=thread->handle;
2972 wait->threads[wait->num]=thread;
2975 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2976 mono_thread_internal_stop (thread);
2980 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
2981 && !mono_gc_is_finalizer_internal_thread (thread);
2985 * mono_threads_set_shutting_down:
2987 * Is called by a thread that wants to shut down Mono. If the runtime is already
2988 * shutting down, the calling thread is suspended/stopped, and this function never
2992 mono_threads_set_shutting_down (void)
2994 MonoInternalThread *current_thread = mono_thread_internal_current ();
2996 mono_threads_lock ();
2998 if (shutting_down) {
2999 mono_threads_unlock ();
3001 /* Make sure we're properly suspended/stopped */
3003 LOCK_THREAD (current_thread);
3005 if ((current_thread->state & ThreadState_SuspendRequested) ||
3006 (current_thread->state & ThreadState_AbortRequested) ||
3007 (current_thread->state & ThreadState_StopRequested)) {
3008 UNLOCK_THREAD (current_thread);
3009 mono_thread_execute_interruption ();
3011 current_thread->state |= ThreadState_Stopped;
3012 UNLOCK_THREAD (current_thread);
3015 /*since we're killing the thread, unset the current domain.*/
3016 mono_domain_unset ();
3018 /* Wake up other threads potentially waiting for us */
3019 mono_thread_info_exit ();
3021 shutting_down = TRUE;
3023 /* Not really a background state change, but this will
3024 * interrupt the main thread if it is waiting for all
3025 * the other threads.
3027 SetEvent (background_change_event);
3029 mono_threads_unlock ();
3033 void mono_thread_manage (void)
3035 struct wait_data wait_data;
3036 struct wait_data *wait = &wait_data;
3038 memset (wait, 0, sizeof (struct wait_data));
3039 /* join each thread that's still running */
3040 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3042 mono_threads_lock ();
3044 THREAD_DEBUG (g_message("%s: No threads", __func__));
3045 mono_threads_unlock ();
3048 mono_threads_unlock ();
3051 mono_threads_lock ();
3052 if (shutting_down) {
3053 /* somebody else is shutting down */
3054 mono_threads_unlock ();
3057 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3058 mono_g_hash_table_foreach (threads, print_tids, NULL));
3060 ResetEvent (background_change_event);
3062 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3063 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3064 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3065 mono_threads_unlock ();
3067 /* Something to wait for */
3068 wait_for_tids_or_state_change (wait, INFINITE);
3070 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3071 } while(wait->num>0);
3073 /* Mono is shutting down, so just wait for the end */
3074 if (!mono_runtime_try_shutdown ()) {
3075 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3076 mono_thread_suspend (mono_thread_internal_current ());
3077 mono_thread_execute_interruption ();
3081 * Remove everything but the finalizer thread and self.
3082 * Also abort all the background threads
3085 mono_threads_lock ();
3088 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3089 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3090 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3092 mono_threads_unlock ();
3094 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3096 /* Something to wait for */
3097 wait_for_tids (wait, INFINITE);
3099 } while (wait->num > 0);
3102 * give the subthreads a chance to really quit (this is mainly needed
3103 * to get correct user and system times from getrusage/wait/time(1)).
3104 * This could be removed if we avoid pthread_detach() and use pthread_join().
3106 mono_thread_info_yield ();
3110 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3112 MonoInternalThread *thread = (MonoInternalThread*)value;
3113 struct wait_data *wait = (struct wait_data*)user_data;
3117 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3119 * This needs no locking.
3121 if ((thread->state & ThreadState_Suspended) != 0 ||
3122 (thread->state & ThreadState_Stopped) != 0)
3125 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3126 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3130 wait->handles [wait->num] = handle;
3131 wait->threads [wait->num] = thread;
3137 * mono_thread_suspend_all_other_threads:
3139 * Suspend all managed threads except the finalizer thread and this thread. It is
3140 * not possible to resume them later.
3142 void mono_thread_suspend_all_other_threads (void)
3144 struct wait_data wait_data;
3145 struct wait_data *wait = &wait_data;
3147 MonoNativeThreadId self = mono_native_thread_id_get ();
3148 guint32 eventidx = 0;
3149 gboolean starting, finished;
3151 memset (wait, 0, sizeof (struct wait_data));
3153 * The other threads could be in an arbitrary state at this point, i.e.
3154 * they could be starting up, shutting down etc. This means that there could be
3155 * threads which are not even in the threads hash table yet.
3159 * First we set a barrier which will be checked by all threads before they
3160 * are added to the threads hash table, and they will exit if the flag is set.
3161 * This ensures that no threads could be added to the hash later.
3162 * We will use shutting_down as the barrier for now.
3164 g_assert (shutting_down);
3167 * We make multiple calls to WaitForMultipleObjects since:
3168 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3169 * - some threads could exit without becoming suspended
3174 * Make a copy of the hashtable since we can't do anything with
3175 * threads while threads_mutex is held.
3178 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3179 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3180 mono_threads_lock ();
3181 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3182 mono_threads_unlock ();
3185 /* Get the suspended events that we'll be waiting for */
3186 for (i = 0; i < wait->num; ++i) {
3187 MonoInternalThread *thread = wait->threads [i];
3189 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3190 || mono_gc_is_finalizer_internal_thread (thread)
3191 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3193 //CloseHandle (wait->handles [i]);
3194 wait->threads [i] = NULL; /* ignore this thread in next loop */
3198 LOCK_THREAD (thread);
3200 if ((thread->state & ThreadState_Suspended) != 0 ||
3201 (thread->state & ThreadState_StopRequested) != 0 ||
3202 (thread->state & ThreadState_Stopped) != 0) {
3203 UNLOCK_THREAD (thread);
3204 CloseHandle (wait->handles [i]);
3205 wait->threads [i] = NULL; /* ignore this thread in next loop */
3211 /* Convert abort requests into suspend requests */
3212 if ((thread->state & ThreadState_AbortRequested) != 0)
3213 thread->state &= ~ThreadState_AbortRequested;
3215 thread->state |= ThreadState_SuspendRequested;
3217 UNLOCK_THREAD (thread);
3219 /* Signal the thread to suspend */
3220 suspend_thread_internal (thread, TRUE);
3222 if (eventidx <= 0) {
3224 * If there are threads which are starting up, we wait until they
3225 * are suspended when they try to register in the threads hash.
3226 * This is guaranteed to finish, since the threads which can create new
3227 * threads get suspended after a while.
3228 * FIXME: The finalizer thread can still create new threads.
3230 mono_threads_lock ();
3231 if (threads_starting_up)
3232 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3235 mono_threads_unlock ();
3237 mono_thread_info_sleep (100, NULL);
3245 MonoInternalThread *thread;
3246 MonoStackFrameInfo *frames;
3247 int nframes, max_frames;
3248 int nthreads, max_threads;
3249 MonoInternalThread **threads;
3250 } ThreadDumpUserData;
3252 static gboolean thread_dump_requested;
3254 /* This needs to be async safe */
3256 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3258 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3260 if (ud->nframes < ud->max_frames) {
3261 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3268 /* This needs to be async safe */
3269 static SuspendThreadResult
3270 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3272 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3273 MonoInternalThread *thread = user_data->thread;
3276 /* This no longer works with remote unwinding */
3278 wapi_desc = wapi_current_thread_desc ();
3279 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3284 if (thread == mono_thread_internal_current ())
3285 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3287 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3289 return MonoResumeThread;
3293 int nthreads, max_threads;
3294 MonoInternalThread **threads;
3295 } CollectThreadsUserData;
3298 collect_thread (gpointer key, gpointer value, gpointer user)
3300 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3301 MonoInternalThread *thread = (MonoInternalThread *)value;
3303 if (ud->nthreads < ud->max_threads)
3304 ud->threads [ud->nthreads ++] = thread;
3308 * Collect running threads into the THREADS array.
3309 * THREADS should be an array allocated on the stack.
3312 collect_threads (MonoInternalThread **thread_array, int max_threads)
3314 CollectThreadsUserData ud;
3316 memset (&ud, 0, sizeof (ud));
3317 /* This array contains refs, but its on the stack, so its ok */
3318 ud.threads = thread_array;
3319 ud.max_threads = max_threads;
3321 mono_threads_lock ();
3322 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3323 mono_threads_unlock ();
3329 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3331 GString* text = g_string_new (0);
3333 GError *error = NULL;
3336 ud->thread = thread;
3339 /* Collect frames for the thread */
3340 if (thread == mono_thread_internal_current ()) {
3341 get_thread_dump (mono_thread_info_current (), ud);
3343 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3347 * Do all the non async-safe work outside of get_thread_dump.
3350 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3352 g_string_append_printf (text, "\n\"%s\"", name);
3355 else if (thread->threadpool_thread) {
3356 g_string_append (text, "\n\"<threadpool thread>\"");
3358 g_string_append (text, "\n\"<unnamed thread>\"");
3361 for (i = 0; i < ud->nframes; ++i) {
3362 MonoStackFrameInfo *frame = &ud->frames [i];
3363 MonoMethod *method = NULL;
3365 if (frame->type == FRAME_TYPE_MANAGED)
3366 method = mono_jit_info_get_method (frame->ji);
3369 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3370 g_string_append_printf (text, " %s\n", location);
3373 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3377 fprintf (stdout, "%s", text->str);
3379 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3380 OutputDebugStringA(text->str);
3383 g_string_free (text, TRUE);
3388 mono_threads_perform_thread_dump (void)
3390 ThreadDumpUserData ud;
3391 MonoInternalThread *thread_array [128];
3392 int tindex, nthreads;
3394 if (!thread_dump_requested)
3397 printf ("Full thread dump:\n");
3399 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3400 nthreads = collect_threads (thread_array, 128);
3402 memset (&ud, 0, sizeof (ud));
3403 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3404 ud.max_frames = 256;
3406 for (tindex = 0; tindex < nthreads; ++tindex)
3407 dump_thread (thread_array [tindex], &ud);
3411 thread_dump_requested = FALSE;
3414 /* Obtain the thread dump of all threads */
3416 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3418 ThreadDumpUserData ud;
3419 MonoInternalThread *thread_array [128];
3420 MonoDomain *domain = mono_domain_get ();
3421 MonoDebugSourceLocation *location;
3422 int tindex, nthreads;
3424 *out_threads = NULL;
3425 *out_stack_frames = NULL;
3427 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3428 nthreads = collect_threads (thread_array, 128);
3430 memset (&ud, 0, sizeof (ud));
3431 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3432 ud.max_frames = 256;
3434 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3435 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3437 for (tindex = 0; tindex < nthreads; ++tindex) {
3438 MonoInternalThread *thread = thread_array [tindex];
3439 MonoArray *thread_frames;
3445 /* Collect frames for the thread */
3446 if (thread == mono_thread_internal_current ()) {
3447 get_thread_dump (mono_thread_info_current (), &ud);
3449 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3452 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3454 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3455 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3457 for (i = 0; i < ud.nframes; ++i) {
3458 MonoStackFrameInfo *frame = &ud.frames [i];
3459 MonoMethod *method = NULL;
3460 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
3462 sf->native_offset = frame->native_offset;
3464 if (frame->type == FRAME_TYPE_MANAGED)
3465 method = mono_jit_info_get_method (frame->ji);
3468 sf->method_address = (gsize) frame->ji->code_start;
3470 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3472 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3474 sf->il_offset = location->il_offset;
3476 if (location && location->source_file) {
3477 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3478 sf->line = location->row;
3479 sf->column = location->column;
3481 mono_debug_free_source_location (location);
3486 mono_array_setref (thread_frames, i, sf);
3494 * mono_threads_request_thread_dump:
3496 * Ask all threads except the current to print their stacktrace to stdout.
3499 mono_threads_request_thread_dump (void)
3501 /*The new thread dump code runs out of the finalizer thread. */
3502 thread_dump_requested = TRUE;
3503 mono_gc_finalize_notify ();
3508 gint allocated; /* +1 so that refs [allocated] == NULL */
3512 typedef struct ref_stack RefStack;
3515 ref_stack_new (gint initial_size)
3519 initial_size = MAX (initial_size, 16) + 1;
3520 rs = g_new0 (RefStack, 1);
3521 rs->refs = g_new0 (gpointer, initial_size);
3522 rs->allocated = initial_size;
3527 ref_stack_destroy (gpointer ptr)
3529 RefStack *rs = (RefStack *)ptr;
3538 ref_stack_push (RefStack *rs, gpointer ptr)
3540 g_assert (rs != NULL);
3542 if (rs->bottom >= rs->allocated) {
3543 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3544 rs->allocated <<= 1;
3545 rs->refs [rs->allocated] = NULL;
3547 rs->refs [rs->bottom++] = ptr;
3551 ref_stack_pop (RefStack *rs)
3553 if (rs == NULL || rs->bottom == 0)
3557 rs->refs [rs->bottom] = NULL;
3561 ref_stack_find (RefStack *rs, gpointer ptr)
3568 for (refs = rs->refs; refs && *refs; refs++) {
3576 * mono_thread_push_appdomain_ref:
3578 * Register that the current thread may have references to objects in domain
3579 * @domain on its stack. Each call to this function should be paired with a
3580 * call to pop_appdomain_ref.
3583 mono_thread_push_appdomain_ref (MonoDomain *domain)
3585 MonoInternalThread *thread = mono_thread_internal_current ();
3588 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3589 SPIN_LOCK (thread->lock_thread_id);
3590 if (thread->appdomain_refs == NULL)
3591 thread->appdomain_refs = ref_stack_new (16);
3592 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3593 SPIN_UNLOCK (thread->lock_thread_id);
3598 mono_thread_pop_appdomain_ref (void)
3600 MonoInternalThread *thread = mono_thread_internal_current ();
3603 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3604 SPIN_LOCK (thread->lock_thread_id);
3605 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3606 SPIN_UNLOCK (thread->lock_thread_id);
3611 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3614 SPIN_LOCK (thread->lock_thread_id);
3615 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3616 SPIN_UNLOCK (thread->lock_thread_id);
3621 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3623 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3626 typedef struct abort_appdomain_data {
3627 struct wait_data wait;
3629 } abort_appdomain_data;
3632 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3634 MonoInternalThread *thread = (MonoInternalThread*)value;
3635 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3636 MonoDomain *domain = data->domain;
3638 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3639 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3641 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3642 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3645 data->wait.handles [data->wait.num] = handle;
3646 data->wait.threads [data->wait.num] = thread;
3649 /* Just ignore the rest, we can't do anything with
3657 * mono_threads_abort_appdomain_threads:
3659 * Abort threads which has references to the given appdomain.
3662 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3664 #ifdef __native_client__
3668 abort_appdomain_data user_data;
3670 int orig_timeout = timeout;
3673 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3675 start_time = mono_msec_ticks ();
3677 mono_threads_lock ();
3679 user_data.domain = domain;
3680 user_data.wait.num = 0;
3681 /* This shouldn't take any locks */
3682 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3683 mono_threads_unlock ();
3685 if (user_data.wait.num > 0) {
3686 /* Abort the threads outside the threads lock */
3687 for (i = 0; i < user_data.wait.num; ++i)
3688 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3691 * We should wait for the threads either to abort, or to leave the
3692 * domain. We can't do the latter, so we wait with a timeout.
3694 wait_for_tids (&user_data.wait, 100);
3697 /* Update remaining time */
3698 timeout -= mono_msec_ticks () - start_time;
3699 start_time = mono_msec_ticks ();
3701 if (orig_timeout != -1 && timeout < 0)
3704 while (user_data.wait.num > 0);
3706 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3712 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3714 MonoInternalThread *thread = (MonoInternalThread*)value;
3715 MonoDomain *domain = (MonoDomain*)user_data;
3718 /* No locking needed here */
3719 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3721 if (thread->cached_culture_info) {
3722 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3723 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3724 if (obj && obj->vtable->domain == domain)
3725 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3731 * mono_threads_clear_cached_culture:
3733 * Clear the cached_current_culture from all threads if it is in the
3737 mono_threads_clear_cached_culture (MonoDomain *domain)
3739 mono_threads_lock ();
3740 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3741 mono_threads_unlock ();
3745 * mono_thread_get_undeniable_exception:
3747 * Return an exception which needs to be raised when leaving a catch clause.
3748 * This is used for undeniable exception propagation.
3751 mono_thread_get_undeniable_exception (void)
3753 MonoInternalThread *thread = mono_thread_internal_current ();
3755 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3757 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3758 * exception if the thread no longer references a dying appdomain.
3760 thread->abort_exc->trace_ips = NULL;
3761 thread->abort_exc->stack_trace = NULL;
3762 return thread->abort_exc;
3768 #if MONO_SMALL_CONFIG
3769 #define NUM_STATIC_DATA_IDX 4
3770 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3774 #define NUM_STATIC_DATA_IDX 8
3775 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3776 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3780 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3781 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3784 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3786 gpointer *static_data = (gpointer *)addr;
3788 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3789 void **ptr = (void **)static_data [i];
3794 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3795 void **p = ptr + idx;
3798 mark_func ((MonoObject**)p, gc_data);
3804 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3806 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3810 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3812 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3816 * mono_alloc_static_data
3818 * Allocate memory blocks for storing threads or context static data
3821 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3823 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3826 gpointer* static_data = *static_data_ptr;
3828 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3829 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3831 if (mono_gc_user_markers_supported ()) {
3832 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3833 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3835 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3836 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3839 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3840 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3841 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3842 *static_data_ptr = static_data;
3843 static_data [0] = static_data;
3846 for (i = 1; i <= idx; ++i) {
3847 if (static_data [i])
3850 if (mono_gc_user_markers_supported ())
3851 static_data [i] = g_malloc0 (static_data_size [i]);
3853 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3854 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3855 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3860 mono_free_static_data (gpointer* static_data)
3863 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3864 gpointer p = static_data [i];
3868 * At this point, the static data pointer array is still registered with the
3869 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3870 * data. Freeing the individual arrays without first nulling their slots
3871 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3872 * such an already freed array. See bug #13813.
3874 static_data [i] = NULL;
3875 mono_memory_write_barrier ();
3876 if (mono_gc_user_markers_supported ())
3879 mono_gc_free_fixed (p);
3881 mono_gc_free_fixed (static_data);
3885 * mono_init_static_data_info
3887 * Initializes static data counters
3889 static void mono_init_static_data_info (StaticDataInfo *static_data)
3891 static_data->idx = 0;
3892 static_data->offset = 0;
3893 static_data->freelist = NULL;
3897 * mono_alloc_static_data_slot
3899 * Generates an offset for static data. static_data contains the counters
3900 * used to generate it.
3903 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3905 if (!static_data->idx && !static_data->offset) {
3907 * we use the first chunk of the first allocation also as
3908 * an array for the rest of the data
3910 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3912 static_data->offset += align - 1;
3913 static_data->offset &= ~(align - 1);
3914 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3915 static_data->idx ++;
3916 g_assert (size <= static_data_size [static_data->idx]);
3917 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3918 static_data->offset = 0;
3920 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
3921 static_data->offset += size;
3926 * ensure thread static fields already allocated are valid for thread
3927 * This function is called when a thread is created or on thread attach.
3930 thread_adjust_static_data (MonoInternalThread *thread)
3932 mono_threads_lock ();
3933 if (thread_static_info.offset || thread_static_info.idx > 0) {
3934 /* get the current allocated size */
3935 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
3936 mono_alloc_static_data (&thread->static_data, offset, TRUE);
3938 mono_threads_unlock ();
3942 * LOCKING: requires that threads_mutex is held
3945 context_adjust_static_data (MonoAppContext *ctx)
3947 if (context_static_info.offset || context_static_info.idx > 0) {
3948 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
3949 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3950 ctx->data->static_data = ctx->static_data;
3955 * LOCKING: requires that threads_mutex is held
3958 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3960 MonoInternalThread *thread = (MonoInternalThread *)value;
3961 guint32 offset = GPOINTER_TO_UINT (user);
3963 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3967 * LOCKING: requires that threads_mutex is held
3970 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
3972 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
3977 guint32 offset = GPOINTER_TO_UINT (user);
3978 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3979 ctx->data->static_data = ctx->static_data;
3982 static StaticDataFreeList*
3983 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3985 StaticDataFreeList* prev = NULL;
3986 StaticDataFreeList* tmp = static_data->freelist;
3988 if (tmp->size == size) {
3990 prev->next = tmp->next;
3992 static_data->freelist = tmp->next;
4001 #if SIZEOF_VOID_P == 4
4008 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4010 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4012 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4013 MonoBitSet *rb = sets [idx];
4014 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4015 offset /= sizeof (uintptr_t);
4016 /* offset is now the bitmap offset */
4017 for (int i = 0; i < numbits; ++i) {
4018 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4019 mono_bitset_set_fast (rb, offset + i);
4024 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4026 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4027 MonoBitSet *rb = sets [idx];
4028 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4029 offset /= sizeof (uintptr_t);
4030 /* offset is now the bitmap offset */
4031 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4032 mono_bitset_clear_fast (rb, offset + i);
4036 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4038 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4040 StaticDataInfo *info;
4043 if (static_type == SPECIAL_STATIC_THREAD) {
4044 info = &thread_static_info;
4045 sets = thread_reference_bitmaps;
4047 info = &context_static_info;
4048 sets = context_reference_bitmaps;
4051 mono_threads_lock ();
4053 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4057 offset = item->offset;
4060 offset = mono_alloc_static_data_slot (info, size, align);
4063 update_reference_bitmap (sets, offset, bitmap, numbits);
4065 if (static_type == SPECIAL_STATIC_THREAD) {
4066 /* This can be called during startup */
4067 if (threads != NULL)
4068 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4070 if (contexts != NULL)
4071 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4073 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4076 mono_threads_unlock ();
4082 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4084 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4086 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4087 return get_thread_static_data (thread, offset);
4089 return get_context_static_data (thread->current_appcontext, offset);
4094 mono_get_special_static_data (guint32 offset)
4096 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4105 * LOCKING: requires that threads_mutex is held
4108 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4110 MonoInternalThread *thread = (MonoInternalThread *)value;
4111 OffsetSize *data = (OffsetSize *)user;
4112 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4113 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4116 if (!thread->static_data || !thread->static_data [idx])
4118 ptr = ((char*) thread->static_data [idx]) + off;
4119 mono_gc_bzero_atomic (ptr, data->size);
4123 * LOCKING: requires that threads_mutex is held
4126 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4128 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4133 OffsetSize *data = (OffsetSize *)user;
4134 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4135 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4138 if (!ctx->static_data || !ctx->static_data [idx])
4141 ptr = ((char*) ctx->static_data [idx]) + off;
4142 mono_gc_bzero_atomic (ptr, data->size);
4146 do_free_special_slot (guint32 offset, guint32 size)
4148 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4150 StaticDataInfo *info;
4152 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4153 info = &thread_static_info;
4154 sets = thread_reference_bitmaps;
4156 info = &context_static_info;
4157 sets = context_reference_bitmaps;
4160 guint32 data_offset = offset;
4161 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4162 OffsetSize data = { data_offset, size };
4164 clear_reference_bitmap (sets, data.offset, data.size);
4166 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4167 if (threads != NULL)
4168 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4170 if (contexts != NULL)
4171 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4174 if (!mono_runtime_is_shutting_down ()) {
4175 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4177 item->offset = offset;
4180 item->next = info->freelist;
4181 info->freelist = item;
4186 do_free_special (gpointer key, gpointer value, gpointer data)
4188 MonoClassField *field = (MonoClassField *)key;
4189 guint32 offset = GPOINTER_TO_UINT (value);
4192 size = mono_type_size (field->type, &align);
4193 do_free_special_slot (offset, size);
4197 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4199 mono_threads_lock ();
4201 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4203 mono_threads_unlock ();
4207 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4209 /* Only ever called for ThreadLocal instances */
4210 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4212 mono_threads_lock ();
4213 do_free_special_slot (offset, size);
4214 mono_threads_unlock ();
4218 static void CALLBACK dummy_apc (ULONG_PTR param)
4224 * mono_thread_execute_interruption
4226 * Performs the operation that the requested thread state requires (abort,
4229 static MonoException*
4230 mono_thread_execute_interruption (void)
4232 MonoInternalThread *thread = mono_thread_internal_current ();
4234 LOCK_THREAD (thread);
4236 /* MonoThread::interruption_requested can only be changed with atomics */
4237 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4238 /* this will consume pending APC calls */
4240 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4242 InterlockedDecrement (&thread_interruption_requested);
4244 /* Clear the interrupted flag of the thread so it can wait again */
4245 mono_thread_info_clear_self_interrupt ();
4248 if ((thread->state & ThreadState_AbortRequested) != 0) {
4249 UNLOCK_THREAD (thread);
4250 if (thread->abort_exc == NULL) {
4252 * This might be racy, but it has to be called outside the lock
4253 * since it calls managed code.
4255 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4257 return thread->abort_exc;
4259 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4260 self_suspend_internal (thread);
4263 else if ((thread->state & ThreadState_StopRequested) != 0) {
4264 /* FIXME: do this through the JIT? */
4266 UNLOCK_THREAD (thread);
4268 mono_thread_exit ();
4270 } else if (thread->pending_exception) {
4273 exc = thread->pending_exception;
4274 thread->pending_exception = NULL;
4276 UNLOCK_THREAD (thread);
4278 } else if (thread->thread_interrupt_requested) {
4280 thread->thread_interrupt_requested = FALSE;
4281 UNLOCK_THREAD (thread);
4283 return(mono_get_exception_thread_interrupted ());
4286 UNLOCK_THREAD (thread);
4292 * mono_thread_request_interruption
4294 * A signal handler can call this method to request the interruption of a
4295 * thread. The result of the interruption will depend on the current state of
4296 * the thread. If the result is an exception that needs to be throw, it is
4297 * provided as return value.
4300 mono_thread_request_interruption (gboolean running_managed)
4302 MonoInternalThread *thread = mono_thread_internal_current ();
4304 /* The thread may already be stopping */
4309 if (thread->interrupt_on_stop &&
4310 thread->state & ThreadState_StopRequested &&
4311 thread->state & ThreadState_Background)
4315 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4317 InterlockedIncrement (&thread_interruption_requested);
4319 if (!running_managed || is_running_protected_wrapper ()) {
4320 /* Can't stop while in unmanaged code. Increase the global interruption
4321 request count. When exiting the unmanaged method the count will be
4322 checked and the thread will be interrupted. */
4324 if (mono_thread_notify_pending_exc_fn && !running_managed)
4325 /* The JIT will notify the thread about the interruption */
4326 /* This shouldn't take any locks */
4327 mono_thread_notify_pending_exc_fn (NULL);
4329 /* this will awake the thread if it is in WaitForSingleObject
4331 /* Our implementation of this function ignores the func argument */
4333 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4335 mono_thread_info_self_interrupt ();
4340 return mono_thread_execute_interruption ();
4344 /*This function should be called by a thread after it has exited all of
4345 * its handle blocks at interruption time.*/
4347 mono_thread_resume_interruption (void)
4349 MonoInternalThread *thread = mono_thread_internal_current ();
4350 gboolean still_aborting;
4352 /* The thread may already be stopping */
4356 LOCK_THREAD (thread);
4357 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4358 UNLOCK_THREAD (thread);
4360 /*This can happen if the protected block called Thread::ResetAbort*/
4361 if (!still_aborting)
4364 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4366 InterlockedIncrement (&thread_interruption_requested);
4368 mono_thread_info_self_interrupt ();
4370 return mono_thread_execute_interruption ();
4373 gboolean mono_thread_interruption_requested ()
4375 if (thread_interruption_requested) {
4376 MonoInternalThread *thread = mono_thread_internal_current ();
4377 /* The thread may already be stopping */
4379 return (thread->interruption_requested);
4384 static MonoException*
4385 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4387 MonoInternalThread *thread = mono_thread_internal_current ();
4389 /* The thread may already be stopping */
4393 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4394 MonoException* exc = mono_thread_execute_interruption ();
4402 * Performs the interruption of the current thread, if one has been requested,
4403 * and the thread is not running a protected wrapper.
4404 * Return the exception which needs to be thrown, if any.
4407 mono_thread_interruption_checkpoint (void)
4409 return mono_thread_interruption_checkpoint_request (FALSE);
4413 * Performs the interruption of the current thread, if one has been requested.
4414 * Return the exception which needs to be thrown, if any.
4417 mono_thread_force_interruption_checkpoint_noraise (void)
4419 return mono_thread_interruption_checkpoint_request (TRUE);
4423 * Performs the interruption of the current thread, if one has been requested.
4424 * Throw the exception which needs to be thrown, if any.
4427 mono_thread_force_interruption_checkpoint (void)
4431 ex = mono_thread_interruption_checkpoint_request (TRUE);
4433 mono_raise_exception (ex);
4437 * mono_thread_get_and_clear_pending_exception:
4439 * Return any pending exceptions for the current thread and clear it as a side effect.
4442 mono_thread_get_and_clear_pending_exception (void)
4444 MonoInternalThread *thread = mono_thread_internal_current ();
4446 /* The thread may already be stopping */
4450 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4451 return mono_thread_execute_interruption ();
4454 if (thread->pending_exception) {
4455 MonoException *exc = thread->pending_exception;
4457 thread->pending_exception = NULL;
4465 * mono_set_pending_exception:
4467 * Set the pending exception of the current thread to EXC.
4468 * The exception will be thrown when execution returns to managed code.
4471 mono_set_pending_exception (MonoException *exc)
4473 MonoInternalThread *thread = mono_thread_internal_current ();
4475 /* The thread may already be stopping */
4479 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4481 mono_thread_request_interruption (FALSE);
4485 * mono_thread_interruption_request_flag:
4487 * Returns the address of a flag that will be non-zero if an interruption has
4488 * been requested for a thread. The thread to interrupt may not be the current
4489 * thread, so an additional call to mono_thread_interruption_requested() or
4490 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4493 gint32* mono_thread_interruption_request_flag ()
4495 return &thread_interruption_requested;
4499 mono_thread_init_apartment_state (void)
4502 MonoInternalThread* thread = mono_thread_internal_current ();
4504 /* Positive return value indicates success, either
4505 * S_OK if this is first CoInitialize call, or
4506 * S_FALSE if CoInitialize already called, but with same
4507 * threading model. A negative value indicates failure,
4508 * probably due to trying to change the threading model.
4510 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4511 ? COINIT_APARTMENTTHREADED
4512 : COINIT_MULTITHREADED) < 0) {
4513 thread->apartment_state = ThreadApartmentState_Unknown;
4519 mono_thread_cleanup_apartment_state (void)
4522 MonoInternalThread* thread = mono_thread_internal_current ();
4524 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4531 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4533 LOCK_THREAD (thread);
4534 thread->state |= state;
4535 UNLOCK_THREAD (thread);
4539 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4541 LOCK_THREAD (thread);
4542 thread->state &= ~state;
4543 UNLOCK_THREAD (thread);
4547 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4549 gboolean ret = FALSE;
4551 LOCK_THREAD (thread);
4553 if ((thread->state & test) != 0) {
4557 UNLOCK_THREAD (thread);
4562 static gboolean has_tls_get = FALSE;
4565 mono_runtime_set_has_tls_get (gboolean val)
4571 mono_runtime_has_tls_get (void)
4577 self_interrupt_thread (void *_unused)
4579 MonoThreadInfo *info = mono_thread_info_current ();
4580 MonoException *exc = mono_thread_execute_interruption ();
4581 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4582 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. */
4583 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4587 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4591 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4595 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4597 MonoJitInfo **dest = (MonoJitInfo **)data;
4603 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4605 MonoJitInfo *ji = NULL;
4608 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4613 MonoInternalThread *thread;
4614 gboolean install_async_abort;
4615 MonoThreadInfoInterruptToken *interrupt_token;
4618 static SuspendThreadResult
4619 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4621 AbortThreadData *data = (AbortThreadData *)ud;
4622 MonoInternalThread *thread = data->thread;
4623 MonoJitInfo *ji = NULL;
4624 gboolean protected_wrapper;
4625 gboolean running_managed;
4627 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4628 return MonoResumeThread;
4630 /*someone is already interrupting it*/
4631 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4632 return MonoResumeThread;
4634 InterlockedIncrement (&thread_interruption_requested);
4636 ji = mono_thread_info_get_last_managed (info);
4637 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4638 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4640 if (!protected_wrapper && running_managed) {
4641 /*We are in managed code*/
4642 /*Set the thread to call */
4643 if (data->install_async_abort)
4644 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4645 return MonoResumeThread;
4647 if (mono_thread_notify_pending_exc_fn)
4648 /* The JIT will notify the thread about the interruption */
4649 mono_thread_notify_pending_exc_fn (info);
4652 * This will cause waits to be broken.
4653 * It will also prevent the thread from entering a wait, so if the thread returns
4654 * from the wait before it receives the abort signal, it will just spin in the wait
4655 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4658 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4660 return MonoResumeThread;
4665 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4667 AbortThreadData data = { 0 };
4668 data.thread = thread;
4669 data.install_async_abort = install_async_abort;
4672 FIXME this is insanely broken, it doesn't cause interruption to happen
4673 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4675 if (thread == mono_thread_internal_current ()) {
4676 /* Do it synchronously */
4677 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4679 mono_raise_exception (exc);
4681 mono_thread_info_self_interrupt ();
4686 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4687 if (data.interrupt_token)
4688 mono_thread_info_finish_interrupt (data.interrupt_token);
4689 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4693 MonoInternalThread *thread;
4695 MonoThreadInfoInterruptToken *interrupt_token;
4696 } SuspendThreadData;
4698 static SuspendThreadResult
4699 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4701 SuspendThreadData *data = (SuspendThreadData *)ud;
4702 MonoInternalThread *thread = data->thread;
4703 MonoJitInfo *ji = NULL;
4704 gboolean protected_wrapper;
4705 gboolean running_managed;
4707 ji = mono_thread_info_get_last_managed (info);
4708 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4709 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4711 if (running_managed && !protected_wrapper) {
4712 thread->state &= ~ThreadState_SuspendRequested;
4713 thread->state |= ThreadState_Suspended;
4714 return KeepSuspended;
4716 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4717 InterlockedIncrement (&thread_interruption_requested);
4718 if (data->interrupt)
4719 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4721 if (mono_thread_notify_pending_exc_fn && !running_managed)
4722 /* The JIT will notify the thread about the interruption */
4723 mono_thread_notify_pending_exc_fn (info);
4724 return MonoResumeThread;
4729 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4731 LOCK_THREAD (thread);
4732 if (thread == mono_thread_internal_current ()) {
4733 mono_thread_info_begin_self_suspend ();
4734 //XXX replace this with better named functions
4735 thread->state &= ~ThreadState_SuspendRequested;
4736 thread->state |= ThreadState_Suspended;
4737 UNLOCK_THREAD (thread);
4738 mono_thread_info_end_self_suspend ();
4740 SuspendThreadData data = { 0 };
4741 data.thread = thread;
4742 data.interrupt = interrupt;
4744 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4745 if (data.interrupt_token)
4746 mono_thread_info_finish_interrupt (data.interrupt_token);
4747 UNLOCK_THREAD (thread);
4751 /*This is called with @thread synch_cs held and it must release it*/
4753 self_suspend_internal (MonoInternalThread *thread)
4755 mono_thread_info_begin_self_suspend ();
4756 thread->state &= ~ThreadState_SuspendRequested;
4757 thread->state |= ThreadState_Suspended;
4758 UNLOCK_THREAD (thread);
4759 mono_thread_info_end_self_suspend ();
4764 * mono_thread_is_foreign:
4765 * @thread: the thread to query
4767 * This function allows one to determine if a thread was created by the mono runtime and has
4768 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4770 * Returns: true if @thread was not created by the runtime.
4773 mono_thread_is_foreign (MonoThread *thread)
4775 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4776 return info->runtime_thread == FALSE;
4780 * mono_add_joinable_thread:
4782 * Add TID to the list of joinable threads.
4783 * LOCKING: Acquires the threads lock.
4786 mono_threads_add_joinable_thread (gpointer tid)
4790 * We cannot detach from threads because it causes problems like
4791 * 2fd16f60/r114307. So we collect them and join them when
4792 * we have time (in he finalizer thread).
4794 joinable_threads_lock ();
4795 if (!joinable_threads)
4796 joinable_threads = g_hash_table_new (NULL, NULL);
4797 g_hash_table_insert (joinable_threads, tid, tid);
4798 joinable_thread_count ++;
4799 joinable_threads_unlock ();
4801 mono_gc_finalize_notify ();
4806 * mono_threads_join_threads:
4808 * Join all joinable threads. This is called from the finalizer thread.
4809 * LOCKING: Acquires the threads lock.
4812 mono_threads_join_threads (void)
4815 GHashTableIter iter;
4822 if (!joinable_thread_count)
4826 joinable_threads_lock ();
4828 if (g_hash_table_size (joinable_threads)) {
4829 g_hash_table_iter_init (&iter, joinable_threads);
4830 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4831 thread = (pthread_t)tid;
4832 g_hash_table_remove (joinable_threads, key);
4833 joinable_thread_count --;
4836 joinable_threads_unlock ();
4838 if (thread != pthread_self ())
4839 /* This shouldn't block */
4840 pthread_join (thread, NULL);
4851 * Wait for thread TID to exit.
4852 * LOCKING: Acquires the threads lock.
4855 mono_thread_join (gpointer tid)
4859 gboolean found = FALSE;
4861 joinable_threads_lock ();
4862 if (!joinable_threads)
4863 joinable_threads = g_hash_table_new (NULL, NULL);
4864 if (g_hash_table_lookup (joinable_threads, tid)) {
4865 g_hash_table_remove (joinable_threads, tid);
4866 joinable_thread_count --;
4869 joinable_threads_unlock ();
4872 thread = (pthread_t)tid;
4873 pthread_join (thread, NULL);
4878 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4880 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4881 mono_thread_interruption_checkpoint ();
4884 static inline gboolean
4885 is_appdomainunloaded_exception (MonoClass *klass)
4887 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4889 if (!app_domain_unloaded_exception_klass)
4890 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4891 g_assert (app_domain_unloaded_exception_klass);
4893 return klass == app_domain_unloaded_exception_klass;
4896 static inline gboolean
4897 is_threadabort_exception (MonoClass *klass)
4899 return klass == mono_defaults.threadabortexception_class;
4903 mono_thread_internal_unhandled_exception (MonoObject* exc)
4905 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4906 MonoClass *klass = exc->vtable->klass;
4907 if (is_threadabort_exception (klass)) {
4908 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4909 } else if (!is_appdomainunloaded_exception (klass)) {
4910 mono_unhandled_exception (exc);
4911 if (mono_environment_exitcode_get () == 1)
4918 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4920 mono_threads_get_thread_dump (out_threads, out_stack_traces);