2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
19 #include <mono/metadata/object.h>
20 #include <mono/metadata/domain-internals.h>
21 #include <mono/metadata/profiler-private.h>
22 #include <mono/metadata/threads.h>
23 #include <mono/metadata/threads-types.h>
24 #include <mono/metadata/exception.h>
25 #include <mono/metadata/environment.h>
26 #include <mono/metadata/monitor.h>
27 #include <mono/metadata/gc-internals.h>
28 #include <mono/metadata/marshal.h>
29 #include <mono/metadata/runtime.h>
30 #include <mono/io-layer/io-layer.h>
31 #include <mono/metadata/object-internals.h>
32 #include <mono/metadata/mono-debug-debugger.h>
33 #include <mono/utils/monobitset.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/hazard-pointer.h>
40 #include <mono/utils/mono-tls.h>
41 #include <mono/utils/atomic.h>
42 #include <mono/utils/mono-memory-model.h>
44 #include <mono/metadata/gc-internals.h>
50 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
51 #define USE_TKILL_ON_ANDROID 1
54 #ifdef PLATFORM_ANDROID
57 #ifdef USE_TKILL_ON_ANDROID
58 extern int tkill (pid_t tid, int signal);
62 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
63 #define THREAD_DEBUG(a)
64 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_WAIT_DEBUG(a)
66 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
67 #define LIBGC_DEBUG(a)
69 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
70 #define SPIN_LOCK(i) do { \
71 if (SPIN_TRYLOCK (i)) \
75 #define SPIN_UNLOCK(i) i = 0
77 #define LOCK_THREAD(thread) lock_thread((thread))
78 #define UNLOCK_THREAD(thread) unlock_thread((thread))
80 /* Provide this for systems with glib < 2.6 */
81 #ifndef G_GSIZE_FORMAT
82 # if GLIB_SIZEOF_LONG == 8
83 # define G_GSIZE_FORMAT "lu"
85 # define G_GSIZE_FORMAT "u"
91 guint32 (*func)(void *);
107 typedef struct _StaticDataFreeList StaticDataFreeList;
108 struct _StaticDataFreeList {
109 StaticDataFreeList *next;
117 StaticDataFreeList *freelist;
120 /* Number of cached culture objects in the MonoThread->cached_culture_info array
121 * (per-type): we use the first NUM entries for CultureInfo and the last for
122 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
124 #define NUM_CACHED_CULTURES 4
125 #define CULTURES_START_IDX 0
126 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
128 /* Controls access to the 'threads' hash table */
129 static void mono_threads_lock (void);
130 static void mono_threads_unlock (void);
131 static MonoCoopMutex threads_mutex;
133 /* Controls access to the 'joinable_threads' hash table */
134 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
135 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
136 static mono_mutex_t joinable_threads_mutex;
138 /* Holds current status of static data heap */
139 static StaticDataInfo thread_static_info;
140 static StaticDataInfo context_static_info;
142 /* The hash of existing threads (key is thread ID, value is
143 * MonoInternalThread*) that need joining before exit
145 static MonoGHashTable *threads=NULL;
147 /* List of app context GC handles.
148 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
150 static GHashTable *contexts = NULL;
152 /* Cleanup queue for contexts. */
153 static MonoReferenceQueue *context_queue;
156 * Threads which are starting up and they are not in the 'threads' hash yet.
157 * When handle_store is called for a thread, it will be removed from this hash table.
158 * Protected by mono_threads_lock ().
160 static MonoGHashTable *threads_starting_up = NULL;
162 /* The TLS key that holds the MonoObject assigned to each thread */
163 static MonoNativeTlsKey current_object_key;
166 /* Protected by the threads lock */
167 static GHashTable *joinable_threads;
168 static int joinable_thread_count;
170 #ifdef MONO_HAVE_FAST_TLS
171 /* we need to use both the Tls* functions and __thread because
172 * the gc needs to see all the threads
174 MONO_FAST_TLS_DECLARE(tls_current_object);
175 #define SET_CURRENT_OBJECT(x) do { \
176 MONO_FAST_TLS_SET (tls_current_object, x); \
177 mono_native_tls_set_value (current_object_key, x); \
179 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
181 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
182 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
185 /* function called at thread start */
186 static MonoThreadStartCB mono_thread_start_cb = NULL;
188 /* function called at thread attach */
189 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
191 /* function called at thread cleanup */
192 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
194 /* function called to notify the runtime about a pending exception on the current thread */
195 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
197 /* The default stack size for each thread */
198 static guint32 default_stacksize = 0;
199 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
201 static void thread_adjust_static_data (MonoInternalThread *thread);
202 static void context_adjust_static_data (MonoAppContext *ctx);
203 static void mono_free_static_data (gpointer* static_data);
204 static void mono_init_static_data_info (StaticDataInfo *static_data);
205 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
206 static gboolean mono_thread_resume (MonoInternalThread* thread);
207 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
208 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
209 static void self_suspend_internal (MonoInternalThread *thread);
211 static MonoException* mono_thread_execute_interruption (void);
212 static void ref_stack_destroy (gpointer rs);
214 /* Spin lock for InterlockedXXX 64 bit functions */
215 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
216 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
217 static mono_mutex_t interlocked_mutex;
219 /* global count of thread interruptions requested */
220 static gint32 thread_interruption_requested = 0;
222 /* Event signaled when a thread changes its background mode */
223 static HANDLE background_change_event;
225 static gboolean shutting_down = FALSE;
227 static gint32 managed_thread_id_counter = 0;
230 mono_threads_lock (void)
232 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
236 mono_threads_unlock (void)
238 mono_locks_coop_release (&threads_mutex, ThreadsLock);
243 get_next_managed_thread_id (void)
245 return InterlockedIncrement (&managed_thread_id_counter);
249 mono_thread_get_tls_key (void)
251 return current_object_key;
255 mono_thread_get_tls_offset (void)
258 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
262 static inline MonoNativeThreadId
263 thread_get_tid (MonoInternalThread *thread)
265 /* We store the tid as a guint64 to keep the object layout constant between platforms */
266 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
269 /* handle_store() and handle_remove() manage the array of threads that
270 * still need to be waited for when the main thread exits.
272 * If handle_store() returns FALSE the thread must not be started
273 * because Mono is shutting down.
275 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
277 mono_threads_lock ();
279 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
281 if (threads_starting_up)
282 mono_g_hash_table_remove (threads_starting_up, thread);
284 if (shutting_down && !force_attach) {
285 mono_threads_unlock ();
290 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
291 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
294 /* We don't need to duplicate thread->handle, because it is
295 * only closed when the thread object is finalized by the GC.
297 g_assert (thread->internal_thread);
298 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
299 thread->internal_thread);
301 mono_threads_unlock ();
306 static gboolean handle_remove(MonoInternalThread *thread)
309 gsize tid = thread->tid;
311 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
313 mono_threads_lock ();
316 /* We have to check whether the thread object for the
317 * tid is still the same in the table because the
318 * thread might have been destroyed and the tid reused
319 * in the meantime, in which case the tid would be in
320 * the table, but with another thread object.
322 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
323 mono_g_hash_table_remove (threads, (gpointer)tid);
332 mono_threads_unlock ();
334 /* Don't close the handle here, wait for the object finalizer
335 * to do it. Otherwise, the following race condition applies:
337 * 1) Thread exits (and handle_remove() closes the handle)
339 * 2) Some other handle is reassigned the same slot
341 * 3) Another thread tries to join the first thread, and
342 * blocks waiting for the reassigned handle to be signalled
343 * (which might never happen). This is possible, because the
344 * thread calling Join() still has a reference to the first
350 static void ensure_synch_cs_set (MonoInternalThread *thread)
352 MonoCoopMutex *synch_cs;
354 if (thread->synch_cs != NULL) {
358 synch_cs = g_new0 (MonoCoopMutex, 1);
359 mono_coop_mutex_init_recursive (synch_cs);
361 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
362 synch_cs, NULL) != NULL) {
363 /* Another thread must have installed this CS */
364 mono_coop_mutex_destroy (synch_cs);
370 lock_thread (MonoInternalThread *thread)
372 if (!thread->synch_cs)
373 ensure_synch_cs_set (thread);
375 g_assert (thread->synch_cs);
377 mono_coop_mutex_lock (thread->synch_cs);
381 unlock_thread (MonoInternalThread *thread)
383 mono_coop_mutex_unlock (thread->synch_cs);
387 * NOTE: this function can be called also for threads different from the current one:
388 * make sure no code called from it will ever assume it is run on the thread that is
389 * getting cleaned up.
391 static void thread_cleanup (MonoInternalThread *thread)
393 g_assert (thread != NULL);
395 if (thread->abort_state_handle) {
396 mono_gchandle_free (thread->abort_state_handle);
397 thread->abort_state_handle = 0;
399 thread->abort_exc = NULL;
400 thread->current_appcontext = NULL;
403 * This is necessary because otherwise we might have
404 * cross-domain references which will not get cleaned up when
405 * the target domain is unloaded.
407 if (thread->cached_culture_info) {
409 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
410 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
414 * thread->synch_cs can be NULL if this was called after
415 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
416 * This can happen only during shutdown.
417 * The shutting_down flag is not always set, so we can't assert on it.
419 if (thread->synch_cs)
420 LOCK_THREAD (thread);
422 thread->state |= ThreadState_Stopped;
423 thread->state &= ~ThreadState_Background;
425 if (thread->synch_cs)
426 UNLOCK_THREAD (thread);
429 An interruption request has leaked to cleanup. Adjust the global counter.
431 This can happen is the abort source thread finds the abortee (this) thread
432 in unmanaged code. If this thread never trips back to managed code or check
433 the local flag it will be left set and positively unbalance the global counter.
435 Leaving the counter unbalanced will cause a performance degradation since all threads
436 will now keep checking their local flags all the time.
438 if (InterlockedExchange (&thread->interruption_requested, 0))
439 InterlockedDecrement (&thread_interruption_requested);
441 /* if the thread is not in the hash it has been removed already */
442 if (!handle_remove (thread)) {
443 if (thread == mono_thread_internal_current ()) {
444 mono_domain_unset ();
445 mono_memory_barrier ();
447 /* This needs to be called even if handle_remove () fails */
448 if (mono_thread_cleanup_fn)
449 mono_thread_cleanup_fn (thread_get_tid (thread));
452 mono_release_type_locks (thread);
454 mono_profiler_thread_end (thread->tid);
456 if (thread == mono_thread_internal_current ()) {
458 * This will signal async signal handlers that the thread has exited.
459 * The profiler callback needs this to be set, so it cannot be done earlier.
461 mono_domain_unset ();
462 mono_memory_barrier ();
465 if (thread == mono_thread_internal_current ())
466 mono_thread_pop_appdomain_ref ();
468 thread->cached_culture_info = NULL;
470 mono_free_static_data (thread->static_data);
471 thread->static_data = NULL;
472 ref_stack_destroy (thread->appdomain_refs);
473 thread->appdomain_refs = NULL;
475 if (mono_thread_cleanup_fn)
476 mono_thread_cleanup_fn (thread_get_tid (thread));
478 if (mono_gc_is_moving ()) {
479 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
480 thread->thread_pinning_ref = NULL;
486 * A special static data offset (guint32) consists of 3 parts:
488 * [0] 6-bit index into the array of chunks.
489 * [6] 25-bit offset into the array.
490 * [31] Bit indicating thread or context static.
495 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
506 } SpecialStaticOffset;
508 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
509 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
511 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
512 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
513 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
514 (((SpecialStaticOffset *) &(x))->fields.f)
517 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
519 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
521 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
522 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
524 return ((char *) thread->static_data [idx]) + off;
528 get_context_static_data (MonoAppContext *ctx, guint32 offset)
530 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
532 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
533 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
535 return ((char *) ctx->static_data [idx]) + off;
539 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
541 static MonoClassField *current_thread_field = NULL;
545 if (!current_thread_field) {
546 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
547 g_assert (current_thread_field);
550 mono_class_vtable (domain, mono_defaults.thread_class);
551 mono_domain_lock (domain);
552 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
553 mono_domain_unlock (domain);
556 return (MonoThread **)get_thread_static_data (thread, offset);
560 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
562 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
564 g_assert (current->obj.vtable->domain == domain);
566 g_assert (!*current_thread_ptr);
567 *current_thread_ptr = current;
571 create_thread_object (MonoDomain *domain, MonoError *error)
573 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
574 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
579 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
583 thread = create_thread_object (domain, error);
584 if (!mono_error_ok (error))
587 MONO_OBJECT_SETREF (thread, internal_thread, internal);
592 static MonoInternalThread*
593 create_internal_thread (MonoError *error)
595 MonoInternalThread *thread;
598 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
599 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
600 if (!mono_error_ok (error))
603 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
604 mono_coop_mutex_init_recursive (thread->synch_cs);
606 thread->apartment_state = ThreadApartmentState_Unknown;
607 thread->managed_id = get_next_managed_thread_id ();
608 if (mono_gc_is_moving ()) {
609 thread->thread_pinning_ref = thread;
610 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
617 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
620 MonoDomain *domain = mono_get_root_domain ();
622 if (!candidate || candidate->obj.vtable->domain != domain) {
623 candidate = new_thread_with_internal (domain, thread, &error);
624 mono_error_raise_exception (&error); /* FIXME don't raise here */
626 set_current_thread_for_domain (domain, thread, candidate);
627 g_assert (!thread->root_domain_thread);
628 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
631 static guint32 WINAPI start_wrapper_internal(void *data)
633 MonoThreadInfo *info;
634 StartInfo *start_info = (StartInfo *)data;
635 guint32 (*start_func)(void *);
639 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
642 MonoInternalThread *internal = start_info->obj->internal_thread;
643 MonoObject *start_delegate = start_info->delegate;
644 MonoDomain *domain = start_info->obj->obj.vtable->domain;
646 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
648 /* We can be sure start_info->obj->tid and
649 * start_info->obj->handle have been set, because the thread
650 * was created suspended, and these values were set before the
654 info = mono_thread_info_current ();
656 internal->thread_info = info;
657 internal->small_id = info->small_id;
661 SET_CURRENT_OBJECT (internal);
663 /* Every thread references the appdomain which created it */
664 mono_thread_push_appdomain_ref (domain);
666 if (!mono_domain_set (domain, FALSE)) {
667 /* No point in raising an appdomain_unloaded exception here */
668 /* FIXME: Cleanup here */
669 mono_thread_pop_appdomain_ref ();
673 start_func = start_info->func;
674 start_arg = start_info->obj->start_obj;
676 start_arg = start_info->start_arg;
678 /* We have to do this here because mono_thread_new_init()
679 requires that root_domain_thread is set up. */
680 thread_adjust_static_data (internal);
681 init_root_domain_thread (internal, start_info->obj);
683 /* This MUST be called before any managed code can be
684 * executed, as it calls the callback function that (for the
685 * jit) sets the lmf marker.
687 mono_thread_new_init (tid, &tid, start_func);
688 internal->stack_ptr = &tid;
689 if (domain != mono_get_root_domain ())
690 set_current_thread_for_domain (domain, internal, start_info->obj);
692 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
694 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
696 /* On 2.0 profile (and higher), set explicitly since state might have been
698 if (internal->apartment_state == ThreadApartmentState_Unknown)
699 internal->apartment_state = ThreadApartmentState_MTA;
701 mono_thread_init_apartment_state ();
703 if(internal->start_notify!=NULL) {
704 /* Let the thread that called Start() know we're
707 ReleaseSemaphore (internal->start_notify, 1, NULL);
711 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
715 * Call this after calling start_notify, since the profiler callback might want
716 * to lock the thread, and the lock is held by thread_start () which waits for
719 mono_profiler_thread_start (tid);
721 /* if the name was set before starting, we didn't invoke the profiler callback */
722 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
723 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
724 mono_profiler_thread_name (internal->tid, tname);
727 /* start_func is set only for unmanaged start functions */
729 start_func (start_arg);
732 g_assert (start_delegate != NULL);
733 args [0] = start_arg;
734 /* we may want to handle the exception here. See comment below on unhandled exceptions */
735 mono_runtime_delegate_invoke (start_delegate, args, NULL);
738 /* If the thread calls ExitThread at all, this remaining code
739 * will not be executed, but the main thread will eventually
740 * call thread_cleanup() on this thread's behalf.
743 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
745 /* Do any cleanup needed for apartment state. This
746 * cannot be done in thread_cleanup since thread_cleanup could be
747 * called for a thread other than the current thread.
748 * mono_thread_cleanup_apartment_state cleans up apartment
749 * for the current thead */
750 mono_thread_cleanup_apartment_state ();
752 thread_cleanup (internal);
756 /* Remove the reference to the thread object in the TLS data,
757 * so the thread object can be finalized. This won't be
758 * reached if the thread threw an uncaught exception, so those
759 * thread handles will stay referenced :-( (This is due to
760 * missing support for scanning thread-specific data in the
761 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
764 SET_CURRENT_OBJECT (NULL);
769 static guint32 WINAPI start_wrapper(void *data)
773 /* Avoid scanning the frames above this frame during a GC */
774 mono_gc_set_stack_end ((void*)&dummy);
776 return start_wrapper_internal (data);
782 * Common thread creation code.
783 * LOCKING: Acquires the threads lock.
786 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
787 gboolean throw_on_failure)
789 HANDLE thread_handle;
790 MonoNativeThreadId tid;
791 guint32 create_flags;
794 * Join joinable threads to prevent running out of threads since the finalizer
795 * thread might be blocked/backlogged.
797 mono_threads_join_threads ();
799 mono_threads_lock ();
802 mono_threads_unlock ();
805 if (threads_starting_up == NULL) {
806 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
807 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
809 mono_g_hash_table_insert (threads_starting_up, thread, thread);
810 mono_threads_unlock ();
812 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
813 if (!internal->start_notify) {
814 mono_threads_lock ();
815 mono_g_hash_table_remove (threads_starting_up, thread);
816 mono_threads_unlock ();
817 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
823 stack_size = default_stacksize_for_thread (internal);
825 /* Create suspended, so we can do some housekeeping before the thread
828 create_flags = CREATE_SUSPENDED;
830 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
831 stack_size, create_flags, &tid);
833 if (thread_handle == NULL) {
834 /* The thread couldn't be created, so throw an exception */
835 mono_threads_lock ();
836 mono_g_hash_table_remove (threads_starting_up, thread);
837 mono_threads_unlock ();
839 if (throw_on_failure)
840 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
842 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
845 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
847 internal->handle = thread_handle;
848 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
850 internal->threadpool_thread = threadpool_thread;
851 if (threadpool_thread)
852 mono_thread_set_state (internal, ThreadState_Background);
854 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
856 /* Only store the handle when the thread is about to be
857 * launched, to avoid the main thread deadlocking while trying
858 * to clean up a thread that will never be signalled.
860 if (!handle_store (thread, FALSE))
863 mono_thread_info_resume (tid);
865 if (internal->start_notify) {
867 * Wait for the thread to set up its TLS data etc, so
868 * theres no potential race condition if someone tries
869 * to look up the data believing the thread has
872 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
874 MONO_PREPARE_BLOCKING;
875 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
876 MONO_FINISH_BLOCKING;
878 CloseHandle (internal->start_notify);
879 internal->start_notify = NULL;
882 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
887 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
889 if (mono_thread_start_cb) {
890 mono_thread_start_cb (tid, stack_start, func);
894 void mono_threads_set_default_stacksize (guint32 stacksize)
896 default_stacksize = stacksize;
899 guint32 mono_threads_get_default_stacksize (void)
901 return default_stacksize;
905 * mono_thread_create_internal:
907 * ARG should not be a GC reference.
910 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
914 MonoInternalThread *internal;
915 StartInfo *start_info;
918 thread = create_thread_object (domain, &error);
919 mono_error_raise_exception (&error); /* FIXME don't raise here */
921 internal = create_internal_thread (&error);
922 mono_error_raise_exception (&error); /* FIXME don't raise here */
924 MONO_OBJECT_SETREF (thread, internal_thread, internal);
926 start_info = g_new0 (StartInfo, 1);
927 start_info->func = (guint32 (*)(void *))func;
928 start_info->obj = thread;
929 start_info->start_arg = arg;
931 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
935 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
936 #ifndef MONO_CROSS_COMPILE
937 if (mono_check_corlib_version () == NULL)
938 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
945 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
947 mono_thread_create_internal (domain, func, arg, FALSE, 0);
951 mono_thread_attach (MonoDomain *domain)
954 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
955 mono_error_raise_exception (&error);
961 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
963 MonoThreadInfo *info;
964 MonoInternalThread *thread;
965 MonoThread *current_thread;
966 HANDLE thread_handle;
967 MonoNativeThreadId tid;
969 mono_error_init (error);
971 if ((thread = mono_thread_internal_current ())) {
972 if (domain != mono_domain_get ())
973 mono_domain_set (domain, TRUE);
974 /* Already attached */
975 return mono_thread_current ();
978 if (!mono_gc_register_thread (&domain)) {
979 g_error ("Thread %"G_GSIZE_FORMAT" calling into managed code is not registered with the GC. On UNIX, this can be fixed by #include-ing <gc.h> before <pthread.h> in the file containing the thread creation code.", mono_native_thread_id_get ());
982 thread = create_internal_thread (error);
983 if (!mono_error_ok (error))
986 thread_handle = mono_thread_info_open_handle ();
987 g_assert (thread_handle);
989 tid=mono_native_thread_id_get ();
991 thread->handle = thread_handle;
992 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
993 thread->stack_ptr = &tid;
995 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
997 info = mono_thread_info_current ();
999 thread->thread_info = info;
1000 thread->small_id = info->small_id;
1002 current_thread = new_thread_with_internal (domain, thread, error);
1003 if (!mono_error_ok (error))
1006 if (!handle_store (current_thread, force_attach)) {
1007 /* Mono is shutting down, so just wait for the end */
1009 mono_thread_info_sleep (10000, NULL);
1012 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1014 SET_CURRENT_OBJECT (thread);
1015 mono_domain_set (domain, TRUE);
1017 thread_adjust_static_data (thread);
1019 init_root_domain_thread (thread, current_thread);
1020 if (domain != mono_get_root_domain ())
1021 set_current_thread_for_domain (domain, thread, current_thread);
1024 if (mono_thread_attach_cb) {
1028 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1031 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1033 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1036 // FIXME: Need a separate callback
1037 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1039 return current_thread;
1043 mono_thread_detach_internal (MonoInternalThread *thread)
1045 g_return_if_fail (thread != NULL);
1047 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1049 thread_cleanup (thread);
1051 SET_CURRENT_OBJECT (NULL);
1052 mono_domain_unset ();
1054 /* Don't need to CloseHandle this thread, even though we took a
1055 * reference in mono_thread_attach (), because the GC will do it
1056 * when the Thread object is finalised.
1061 mono_thread_detach (MonoThread *thread)
1064 mono_thread_detach_internal (thread->internal_thread);
1068 * mono_thread_detach_if_exiting:
1070 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1071 * This should be used at the end of embedding code which calls into managed code, and which
1072 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1075 mono_thread_detach_if_exiting (void)
1077 if (mono_thread_info_is_exiting ()) {
1078 MonoInternalThread *thread;
1080 thread = mono_thread_internal_current ();
1082 mono_thread_detach_internal (thread);
1083 mono_thread_info_detach ();
1091 MonoInternalThread *thread = mono_thread_internal_current ();
1093 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1095 thread_cleanup (thread);
1096 SET_CURRENT_OBJECT (NULL);
1097 mono_domain_unset ();
1099 /* we could add a callback here for embedders to use. */
1100 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1101 exit (mono_environment_exitcode_get ());
1102 mono_thread_info_exit ();
1106 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1109 MonoInternalThread *internal;
1111 internal = create_internal_thread (&error);
1112 mono_error_raise_exception (&error);
1114 internal->state = ThreadState_Unstarted;
1116 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1120 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1123 StartInfo *start_info;
1124 MonoInternalThread *internal;
1127 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1129 if (!this_obj->internal_thread)
1130 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1131 internal = this_obj->internal_thread;
1133 LOCK_THREAD (internal);
1135 if ((internal->state & ThreadState_Unstarted) == 0) {
1136 UNLOCK_THREAD (internal);
1137 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1141 if ((internal->state & ThreadState_Aborted) != 0) {
1142 UNLOCK_THREAD (internal);
1145 /* This is freed in start_wrapper */
1146 start_info = g_new0 (StartInfo, 1);
1147 start_info->func = NULL;
1148 start_info->start_arg = NULL;
1149 start_info->delegate = start;
1150 start_info->obj = this_obj;
1151 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1153 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1155 UNLOCK_THREAD (internal);
1159 internal->state &= ~ThreadState_Unstarted;
1161 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1163 UNLOCK_THREAD (internal);
1164 return internal->handle;
1168 * This is called from the finalizer of the internal thread object.
1171 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1173 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1176 * Since threads keep a reference to their thread object while running, by the time this function is called,
1177 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1178 * when thread_cleanup () can be called after this.
1181 CloseHandle (thread);
1183 if (this_obj->synch_cs) {
1184 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1185 this_obj->synch_cs = NULL;
1186 mono_coop_mutex_destroy (synch_cs);
1190 if (this_obj->name) {
1191 void *name = this_obj->name;
1192 this_obj->name = NULL;
1198 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1201 MonoInternalThread *thread = mono_thread_internal_current ();
1203 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1205 mono_thread_current_check_pending_interrupt ();
1208 gboolean alerted = FALSE;
1210 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1212 res = mono_thread_info_sleep (ms, &alerted);
1214 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1217 MonoException* exc = mono_thread_execute_interruption ();
1219 mono_raise_exception (exc);
1231 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1236 ves_icall_System_Threading_Thread_GetDomainID (void)
1238 return mono_domain_get()->domain_id;
1242 ves_icall_System_Threading_Thread_Yield (void)
1244 return mono_thread_info_yield ();
1248 * mono_thread_get_name:
1250 * Return the name of the thread. NAME_LEN is set to the length of the name.
1251 * Return NULL if the thread has no name. The returned memory is owned by the
1255 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1259 LOCK_THREAD (this_obj);
1261 if (!this_obj->name) {
1265 *name_len = this_obj->name_len;
1266 res = g_new (gunichar2, this_obj->name_len);
1267 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1270 UNLOCK_THREAD (this_obj);
1276 * mono_thread_get_name_utf8:
1278 * Return the name of the thread in UTF-8.
1279 * Return NULL if the thread has no name.
1280 * The returned memory is owned by the caller.
1283 mono_thread_get_name_utf8 (MonoThread *thread)
1288 MonoInternalThread *internal = thread->internal_thread;
1289 if (internal == NULL)
1292 LOCK_THREAD (internal);
1294 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1296 UNLOCK_THREAD (internal);
1302 * mono_thread_get_managed_id:
1304 * Return the Thread.ManagedThreadId value of `thread`.
1305 * Returns -1 if `thread` is NULL.
1308 mono_thread_get_managed_id (MonoThread *thread)
1313 MonoInternalThread *internal = thread->internal_thread;
1314 if (internal == NULL)
1317 int32_t id = internal->managed_id;
1323 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1328 mono_error_init (&error);
1330 LOCK_THREAD (this_obj);
1332 if (!this_obj->name)
1335 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1337 UNLOCK_THREAD (this_obj);
1339 mono_error_raise_exception (&error);
1345 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1347 LOCK_THREAD (this_obj);
1349 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1350 UNLOCK_THREAD (this_obj);
1352 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1355 if (this_obj->name) {
1356 g_free (this_obj->name);
1357 this_obj->name_len = 0;
1360 this_obj->name = g_new (gunichar2, mono_string_length (name));
1361 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1362 this_obj->name_len = mono_string_length (name);
1365 this_obj->name = NULL;
1368 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1370 UNLOCK_THREAD (this_obj);
1372 if (this_obj->name && this_obj->tid) {
1373 char *tname = mono_string_to_utf8 (name);
1374 mono_profiler_thread_name (this_obj->tid, tname);
1375 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1381 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1383 mono_thread_set_name_internal (this_obj, name, TRUE);
1387 * ves_icall_System_Threading_Thread_GetPriority_internal:
1388 * @param this_obj: The MonoInternalThread on which to operate.
1390 * Gets the priority of the given thread.
1391 * @return: The priority of the given thread.
1394 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1397 MonoInternalThread *internal = this_obj->internal_thread;
1399 LOCK_THREAD (internal);
1400 priority = GetThreadPriority (internal->handle) + 2;
1401 UNLOCK_THREAD (internal);
1406 * ves_icall_System_Threading_Thread_SetPriority_internal:
1407 * @param this_obj: The MonoInternalThread on which to operate.
1408 * @param priority: The priority to set.
1410 * Sets the priority of the given thread.
1413 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1415 MonoInternalThread *internal = this_obj->internal_thread;
1417 LOCK_THREAD (internal);
1418 SetThreadPriority (internal->handle, priority - 2);
1419 UNLOCK_THREAD (internal);
1422 /* If the array is already in the requested domain, we just return it,
1423 otherwise we return a copy in that domain. */
1425 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1432 if (mono_object_domain (arr) == domain)
1435 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1436 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1441 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1443 return byte_array_to_domain (arr, mono_get_root_domain ());
1447 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1449 return byte_array_to_domain (arr, mono_domain_get ());
1453 mono_thread_current (void)
1456 MonoDomain *domain = mono_domain_get ();
1457 MonoInternalThread *internal = mono_thread_internal_current ();
1458 MonoThread **current_thread_ptr;
1460 g_assert (internal);
1461 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1463 if (!*current_thread_ptr) {
1464 g_assert (domain != mono_get_root_domain ());
1465 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1466 mono_error_raise_exception (&error); /* FIXME don't raise here */
1468 return *current_thread_ptr;
1471 /* Return the thread object belonging to INTERNAL in the current domain */
1473 mono_thread_current_for_thread (MonoInternalThread *internal)
1476 MonoDomain *domain = mono_domain_get ();
1477 MonoThread **current_thread_ptr;
1479 g_assert (internal);
1480 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1482 if (!*current_thread_ptr) {
1483 g_assert (domain != mono_get_root_domain ());
1484 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1485 mono_error_raise_exception (&error); /* FIXME don't raise here */
1487 return *current_thread_ptr;
1491 mono_thread_internal_current (void)
1493 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1494 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1499 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1501 MonoInternalThread *thread = this_obj->internal_thread;
1502 HANDLE handle = thread->handle;
1503 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1506 mono_thread_current_check_pending_interrupt ();
1508 LOCK_THREAD (thread);
1510 if ((thread->state & ThreadState_Unstarted) != 0) {
1511 UNLOCK_THREAD (thread);
1513 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1517 UNLOCK_THREAD (thread);
1522 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1524 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1526 MONO_PREPARE_BLOCKING;
1527 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1528 MONO_FINISH_BLOCKING;
1530 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1532 if(ret==WAIT_OBJECT_0) {
1533 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1538 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1544 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1552 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1554 MONO_PREPARE_BLOCKING;
1556 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1558 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1559 MONO_FINISH_BLOCKING;
1561 if (ret != WAIT_IO_COMPLETION)
1564 exc = mono_thread_execute_interruption ();
1566 mono_raise_exception (exc);
1571 /* Re-calculate ms according to the time passed */
1572 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1573 if (diff_ms >= ms) {
1577 wait = ms - diff_ms;
1583 /* FIXME: exitContext isnt documented */
1584 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1590 MonoObject *waitHandle;
1591 MonoInternalThread *thread = mono_thread_internal_current ();
1593 /* Do this WaitSleepJoin check before creating objects */
1594 mono_thread_current_check_pending_interrupt ();
1596 /* We fail in managed if the array has more than 64 elements */
1597 numhandles = (guint32)mono_array_length(mono_handles);
1598 handles = g_new0(HANDLE, numhandles);
1600 for(i = 0; i < numhandles; i++) {
1601 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1602 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1609 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1611 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1613 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1617 if(ret==WAIT_FAILED) {
1618 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1620 } else if(ret==WAIT_TIMEOUT) {
1621 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1628 /* FIXME: exitContext isnt documented */
1629 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1631 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1632 uintptr_t numhandles;
1635 MonoObject *waitHandle;
1636 MonoInternalThread *thread = mono_thread_internal_current ();
1638 /* Do this WaitSleepJoin check before creating objects */
1639 mono_thread_current_check_pending_interrupt ();
1641 numhandles = mono_array_length(mono_handles);
1642 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1645 for(i = 0; i < numhandles; i++) {
1646 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1647 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1654 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1656 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1658 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1660 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1663 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1665 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1666 return ret - WAIT_OBJECT_0;
1668 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1669 return ret - WAIT_ABANDONED_0;
1676 /* FIXME: exitContext isnt documented */
1677 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1680 MonoInternalThread *thread = mono_thread_internal_current ();
1682 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1688 mono_thread_current_check_pending_interrupt ();
1690 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1692 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1694 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1696 if(ret==WAIT_FAILED) {
1697 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1699 } else if(ret==WAIT_TIMEOUT) {
1700 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1708 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1711 MonoInternalThread *thread = mono_thread_internal_current ();
1716 mono_thread_current_check_pending_interrupt ();
1718 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1720 MONO_PREPARE_BLOCKING;
1721 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1722 MONO_FINISH_BLOCKING;
1724 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1726 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1729 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1736 mutex = CreateMutex (NULL, owned, NULL);
1738 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1740 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1748 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1749 return(ReleaseMutex (handle));
1752 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1758 *error = ERROR_SUCCESS;
1760 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1762 *error = GetLastError ();
1769 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1776 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1778 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1779 mono_string_chars (name));
1781 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1789 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1793 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1798 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1802 *error = ERROR_SUCCESS;
1804 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1806 *error = GetLastError ();
1812 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1819 event = CreateEvent (NULL, manual, initial, NULL);
1821 event = CreateEvent (NULL, manual, initial,
1822 mono_string_chars (name));
1824 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1832 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1833 return (SetEvent(handle));
1836 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1837 return (ResetEvent(handle));
1841 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1842 CloseHandle (handle);
1845 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1851 *error = ERROR_SUCCESS;
1853 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1855 *error = GetLastError ();
1861 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1863 return InterlockedIncrement (location);
1866 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1868 #if SIZEOF_VOID_P == 4
1869 if (G_UNLIKELY ((size_t)location & 0x7)) {
1871 mono_interlocked_lock ();
1874 mono_interlocked_unlock ();
1878 return InterlockedIncrement64 (location);
1881 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1883 return InterlockedDecrement(location);
1886 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1888 #if SIZEOF_VOID_P == 4
1889 if (G_UNLIKELY ((size_t)location & 0x7)) {
1891 mono_interlocked_lock ();
1894 mono_interlocked_unlock ();
1898 return InterlockedDecrement64 (location);
1901 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1903 return InterlockedExchange(location, value);
1906 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1909 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1910 mono_gc_wbarrier_generic_nostore (location);
1914 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1916 return InterlockedExchangePointer(location, value);
1919 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1921 IntFloatUnion val, ret;
1924 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1930 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1932 #if SIZEOF_VOID_P == 4
1933 if (G_UNLIKELY ((size_t)location & 0x7)) {
1935 mono_interlocked_lock ();
1938 mono_interlocked_unlock ();
1942 return InterlockedExchange64 (location, value);
1946 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1948 LongDoubleUnion val, ret;
1951 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1956 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1958 return InterlockedCompareExchange(location, value, comparand);
1961 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1963 gint32 r = InterlockedCompareExchange(location, value, comparand);
1964 *success = r == comparand;
1968 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1971 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1972 mono_gc_wbarrier_generic_nostore (location);
1976 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1978 return InterlockedCompareExchangePointer(location, value, comparand);
1981 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1983 IntFloatUnion val, ret, cmp;
1986 cmp.fval = comparand;
1987 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1993 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1995 #if SIZEOF_VOID_P == 8
1996 LongDoubleUnion val, comp, ret;
1999 comp.fval = comparand;
2000 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2006 mono_interlocked_lock ();
2008 if (old == comparand)
2010 mono_interlocked_unlock ();
2017 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2019 #if SIZEOF_VOID_P == 4
2020 if (G_UNLIKELY ((size_t)location & 0x7)) {
2022 mono_interlocked_lock ();
2024 if (old == comparand)
2026 mono_interlocked_unlock ();
2030 return InterlockedCompareExchange64 (location, value, comparand);
2034 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2037 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2038 mono_gc_wbarrier_generic_nostore (location);
2043 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2046 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2047 mono_gc_wbarrier_generic_nostore (location);
2052 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2054 return InterlockedAdd (location, value);
2058 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2060 #if SIZEOF_VOID_P == 4
2061 if (G_UNLIKELY ((size_t)location & 0x7)) {
2063 mono_interlocked_lock ();
2066 mono_interlocked_unlock ();
2070 return InterlockedAdd64 (location, value);
2074 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2076 #if SIZEOF_VOID_P == 4
2077 if (G_UNLIKELY ((size_t)location & 0x7)) {
2079 mono_interlocked_lock ();
2081 mono_interlocked_unlock ();
2085 return InterlockedRead64 (location);
2089 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2091 mono_memory_barrier ();
2095 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2097 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2099 if (state & ThreadState_Background) {
2100 /* If the thread changes the background mode, the main thread has to
2101 * be notified, since it has to rebuild the list of threads to
2104 SetEvent (background_change_event);
2109 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2111 mono_thread_set_state (this_obj, (MonoThreadState)state);
2113 if (state & ThreadState_Background) {
2114 /* If the thread changes the background mode, the main thread has to
2115 * be notified, since it has to rebuild the list of threads to
2118 SetEvent (background_change_event);
2123 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2127 LOCK_THREAD (this_obj);
2129 state = this_obj->state;
2131 UNLOCK_THREAD (this_obj);
2136 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2138 MonoInternalThread *current;
2140 MonoInternalThread *thread = this_obj->internal_thread;
2142 LOCK_THREAD (thread);
2144 current = mono_thread_internal_current ();
2146 thread->thread_interrupt_requested = TRUE;
2147 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2149 UNLOCK_THREAD (thread);
2152 abort_thread_internal (thread, TRUE, FALSE);
2156 void mono_thread_current_check_pending_interrupt ()
2158 MonoInternalThread *thread = mono_thread_internal_current ();
2159 gboolean throw_ = FALSE;
2161 LOCK_THREAD (thread);
2163 if (thread->thread_interrupt_requested) {
2165 thread->thread_interrupt_requested = FALSE;
2168 UNLOCK_THREAD (thread);
2171 mono_raise_exception (mono_get_exception_thread_interrupted ());
2176 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2178 LOCK_THREAD (thread);
2180 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2181 (thread->state & ThreadState_StopRequested) != 0 ||
2182 (thread->state & ThreadState_Stopped) != 0)
2184 UNLOCK_THREAD (thread);
2188 if ((thread->state & ThreadState_Unstarted) != 0) {
2189 thread->state |= ThreadState_Aborted;
2190 UNLOCK_THREAD (thread);
2194 thread->state |= ThreadState_AbortRequested;
2195 if (thread->abort_state_handle)
2196 mono_gchandle_free (thread->abort_state_handle);
2198 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2199 g_assert (thread->abort_state_handle);
2201 thread->abort_state_handle = 0;
2203 thread->abort_exc = NULL;
2205 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));
2207 /* During shutdown, we can't wait for other threads */
2209 /* Make sure the thread is awake */
2210 mono_thread_resume (thread);
2212 UNLOCK_THREAD (thread);
2214 abort_thread_internal (thread, TRUE, TRUE);
2218 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2220 MonoInternalThread *thread = mono_thread_internal_current ();
2221 gboolean was_aborting;
2223 LOCK_THREAD (thread);
2224 was_aborting = thread->state & ThreadState_AbortRequested;
2225 thread->state &= ~ThreadState_AbortRequested;
2226 UNLOCK_THREAD (thread);
2228 if (!was_aborting) {
2229 const char *msg = "Unable to reset abort because no abort was requested";
2230 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2233 thread->abort_exc = NULL;
2234 if (thread->abort_state_handle) {
2235 mono_gchandle_free (thread->abort_state_handle);
2236 /* This is actually not necessary - the handle
2237 only counts if the exception is set */
2238 thread->abort_state_handle = 0;
2243 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2245 LOCK_THREAD (thread);
2247 thread->state &= ~ThreadState_AbortRequested;
2249 if (thread->abort_exc) {
2250 thread->abort_exc = NULL;
2251 if (thread->abort_state_handle) {
2252 mono_gchandle_free (thread->abort_state_handle);
2253 /* This is actually not necessary - the handle
2254 only counts if the exception is set */
2255 thread->abort_state_handle = 0;
2259 UNLOCK_THREAD (thread);
2263 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2265 MonoInternalThread *thread = this_obj->internal_thread;
2266 MonoObject *state, *deserialized = NULL, *exc;
2269 if (!thread->abort_state_handle)
2272 state = mono_gchandle_get_target (thread->abort_state_handle);
2275 domain = mono_domain_get ();
2276 if (mono_object_domain (state) == domain)
2279 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2281 if (!deserialized) {
2282 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2284 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2285 mono_set_pending_exception (invalid_op_exc);
2289 return deserialized;
2293 mono_thread_suspend (MonoInternalThread *thread)
2295 LOCK_THREAD (thread);
2297 if ((thread->state & ThreadState_Unstarted) != 0 ||
2298 (thread->state & ThreadState_Aborted) != 0 ||
2299 (thread->state & ThreadState_Stopped) != 0)
2301 UNLOCK_THREAD (thread);
2305 if ((thread->state & ThreadState_Suspended) != 0 ||
2306 (thread->state & ThreadState_SuspendRequested) != 0 ||
2307 (thread->state & ThreadState_StopRequested) != 0)
2309 UNLOCK_THREAD (thread);
2313 thread->state |= ThreadState_SuspendRequested;
2315 UNLOCK_THREAD (thread);
2317 suspend_thread_internal (thread, FALSE);
2322 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2324 if (!mono_thread_suspend (this_obj->internal_thread)) {
2325 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2330 /* LOCKING: LOCK_THREAD(thread) must be held */
2332 mono_thread_resume (MonoInternalThread *thread)
2334 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2335 thread->state &= ~ThreadState_SuspendRequested;
2339 if ((thread->state & ThreadState_Suspended) == 0 ||
2340 (thread->state & ThreadState_Unstarted) != 0 ||
2341 (thread->state & ThreadState_Aborted) != 0 ||
2342 (thread->state & ThreadState_Stopped) != 0)
2347 UNLOCK_THREAD (thread);
2349 /* Awake the thread */
2350 if (!mono_thread_info_resume (thread_get_tid (thread)))
2353 LOCK_THREAD (thread);
2355 thread->state &= ~ThreadState_Suspended;
2361 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2363 if (!thread->internal_thread) {
2364 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2366 LOCK_THREAD (thread->internal_thread);
2367 if (!mono_thread_resume (thread->internal_thread))
2368 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2369 UNLOCK_THREAD (thread->internal_thread);
2374 mono_threads_is_critical_method (MonoMethod *method)
2376 switch (method->wrapper_type) {
2377 case MONO_WRAPPER_RUNTIME_INVOKE:
2378 case MONO_WRAPPER_XDOMAIN_INVOKE:
2379 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2386 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2391 if (mono_threads_is_critical_method (m)) {
2392 *((gboolean*)data) = TRUE;
2399 is_running_protected_wrapper (void)
2401 gboolean found = FALSE;
2402 mono_stack_walk (find_wrapper, &found);
2406 void mono_thread_internal_stop (MonoInternalThread *thread)
2408 LOCK_THREAD (thread);
2410 if ((thread->state & ThreadState_StopRequested) != 0 ||
2411 (thread->state & ThreadState_Stopped) != 0)
2413 UNLOCK_THREAD (thread);
2417 /* Make sure the thread is awake */
2418 mono_thread_resume (thread);
2420 thread->state |= ThreadState_StopRequested;
2421 thread->state &= ~ThreadState_AbortRequested;
2423 UNLOCK_THREAD (thread);
2425 abort_thread_internal (thread, TRUE, TRUE);
2428 void mono_thread_stop (MonoThread *thread)
2430 mono_thread_internal_stop (thread->internal_thread);
2434 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2436 gint8 tmp = *(volatile gint8 *)ptr;
2437 mono_memory_barrier ();
2442 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2444 gint16 tmp = *(volatile gint16 *)ptr;
2445 mono_memory_barrier ();
2450 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2452 gint32 tmp = *(volatile gint32 *)ptr;
2453 mono_memory_barrier ();
2458 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2460 gint64 tmp = *(volatile gint64 *)ptr;
2461 mono_memory_barrier ();
2466 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2468 volatile void *tmp = *(volatile void **)ptr;
2469 mono_memory_barrier ();
2470 return (void *) tmp;
2474 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2476 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2477 mono_memory_barrier ();
2478 return (MonoObject *) tmp;
2482 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2484 double tmp = *(volatile double *)ptr;
2485 mono_memory_barrier ();
2490 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2492 float tmp = *(volatile float *)ptr;
2493 mono_memory_barrier ();
2498 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2500 return InterlockedRead8 ((volatile gint8 *)ptr);
2504 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2506 return InterlockedRead16 ((volatile gint16 *)ptr);
2510 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2512 return InterlockedRead ((volatile gint32 *)ptr);
2516 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2518 #if SIZEOF_VOID_P == 4
2519 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2521 mono_interlocked_lock ();
2522 val = *(gint64*)ptr;
2523 mono_interlocked_unlock ();
2527 return InterlockedRead64 ((volatile gint64 *)ptr);
2531 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2533 return InterlockedReadPointer ((volatile gpointer *)ptr);
2537 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2541 #if SIZEOF_VOID_P == 4
2542 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2544 mono_interlocked_lock ();
2545 val = *(double*)ptr;
2546 mono_interlocked_unlock ();
2551 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2557 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2561 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2567 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2569 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2573 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2575 mono_memory_barrier ();
2576 *(volatile gint8 *)ptr = value;
2580 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2582 mono_memory_barrier ();
2583 *(volatile gint16 *)ptr = value;
2587 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2589 mono_memory_barrier ();
2590 *(volatile gint32 *)ptr = value;
2594 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2596 mono_memory_barrier ();
2597 *(volatile gint64 *)ptr = value;
2601 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2603 mono_memory_barrier ();
2604 *(volatile void **)ptr = value;
2608 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2610 mono_memory_barrier ();
2611 mono_gc_wbarrier_generic_store (ptr, value);
2615 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2617 mono_memory_barrier ();
2618 *(volatile double *)ptr = value;
2622 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2624 mono_memory_barrier ();
2625 *(volatile float *)ptr = value;
2629 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2631 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2635 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2637 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2641 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2643 InterlockedWrite ((volatile gint32 *)ptr, value);
2647 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2649 #if SIZEOF_VOID_P == 4
2650 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2651 mono_interlocked_lock ();
2652 *(gint64*)ptr = value;
2653 mono_interlocked_unlock ();
2658 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2662 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2664 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2668 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2672 #if SIZEOF_VOID_P == 4
2673 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2674 mono_interlocked_lock ();
2675 *(double*)ptr = value;
2676 mono_interlocked_unlock ();
2683 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2687 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2693 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2697 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2699 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2703 free_context (void *user_data)
2705 ContextStaticData *data = user_data;
2707 mono_threads_lock ();
2710 * There is no guarantee that, by the point this reference queue callback
2711 * has been invoked, the GC handle associated with the object will fail to
2712 * resolve as one might expect. So if we don't free and remove the GC
2713 * handle here, free_context_static_data_helper () could end up resolving
2714 * a GC handle to an actually-dead context which would contain a pointer
2715 * to an already-freed static data segment, resulting in a crash when
2718 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2720 mono_threads_unlock ();
2722 mono_gchandle_free (data->gc_handle);
2723 mono_free_static_data (data->static_data);
2728 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2730 mono_threads_lock ();
2732 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2735 contexts = g_hash_table_new (NULL, NULL);
2738 context_queue = mono_gc_reference_queue_new (free_context);
2740 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2741 g_hash_table_insert (contexts, gch, gch);
2744 * We use this intermediate structure to contain a duplicate pointer to
2745 * the static data because we can't rely on being able to resolve the GC
2746 * handle in the reference queue callback.
2748 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2749 data->gc_handle = GPOINTER_TO_UINT (gch);
2752 context_adjust_static_data (ctx);
2753 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2755 mono_threads_unlock ();
2757 mono_profiler_context_loaded (ctx);
2761 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2764 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2765 * cleanup in exceptional circumstances, we don't actually do any
2766 * cleanup work here. We instead do this via a reference queue.
2769 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2771 mono_profiler_context_unloaded (ctx);
2775 mono_thread_init_tls (void)
2777 MONO_FAST_TLS_INIT (tls_current_object);
2778 mono_native_tls_alloc (¤t_object_key, NULL);
2781 void mono_thread_init (MonoThreadStartCB start_cb,
2782 MonoThreadAttachCB attach_cb)
2784 mono_coop_mutex_init_recursive (&threads_mutex);
2786 mono_os_mutex_init_recursive(&interlocked_mutex);
2787 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2789 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2790 g_assert(background_change_event != NULL);
2792 mono_init_static_data_info (&thread_static_info);
2793 mono_init_static_data_info (&context_static_info);
2795 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2797 mono_thread_start_cb = start_cb;
2798 mono_thread_attach_cb = attach_cb;
2800 /* Get a pseudo handle to the current process. This is just a
2801 * kludge so that wapi can build a process handle if needed.
2802 * As a pseudo handle is returned, we don't need to clean
2805 GetCurrentProcess ();
2808 void mono_thread_cleanup (void)
2810 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2811 MonoThreadInfo *info;
2813 /* The main thread must abandon any held mutexes (particularly
2814 * important for named mutexes as they are shared across
2815 * processes, see bug 74680.) This will happen when the
2816 * thread exits, but if it's not running in a subthread it
2817 * won't exit in time.
2819 info = mono_thread_info_current ();
2820 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2824 /* This stuff needs more testing, it seems one of these
2825 * critical sections can be locked when mono_thread_cleanup is
2828 mono_coop_mutex_destroy (&threads_mutex);
2829 mono_os_mutex_destroy (&interlocked_mutex);
2830 mono_os_mutex_destroy (&delayed_free_table_mutex);
2831 mono_os_mutex_destroy (&small_id_mutex);
2832 CloseHandle (background_change_event);
2835 mono_native_tls_free (current_object_key);
2839 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2841 mono_thread_cleanup_fn = func;
2845 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2847 thread->internal_thread->manage_callback = func;
2850 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2852 mono_thread_notify_pending_exc_fn = func;
2856 static void print_tids (gpointer key, gpointer value, gpointer user)
2858 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2859 * sizeof(uint) and a cast to uint would overflow
2861 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2862 * print this as a pointer.
2864 g_message ("Waiting for: %p", key);
2869 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2870 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2874 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2878 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2880 MONO_PREPARE_BLOCKING;
2881 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2882 MONO_FINISH_BLOCKING;
2884 if(ret==WAIT_FAILED) {
2885 /* See the comment in build_wait_tids() */
2886 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2890 for(i=0; i<wait->num; i++)
2891 CloseHandle (wait->handles[i]);
2893 if (ret == WAIT_TIMEOUT)
2896 for(i=0; i<wait->num; i++) {
2897 gsize tid = wait->threads[i]->tid;
2900 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2901 * it can still run io-layer etc. code. So wait for it to really exit.
2902 * FIXME: This won't join threads which are not in the joinable_hash yet.
2904 mono_thread_join ((gpointer)tid);
2906 mono_threads_lock ();
2907 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2908 /* This thread must have been killed, because
2909 * it hasn't cleaned itself up. (It's just
2910 * possible that the thread exited before the
2911 * parent thread had a chance to store the
2912 * handle, and now there is another pointer to
2913 * the already-exited thread stored. In this
2914 * case, we'll just get two
2915 * mono_profiler_thread_end() calls for the
2919 mono_threads_unlock ();
2920 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2921 thread_cleanup (wait->threads[i]);
2923 mono_threads_unlock ();
2928 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2930 guint32 i, ret, count;
2932 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2934 /* Add the thread state change event, so it wakes up if a thread changes
2935 * to background mode.
2938 if (count < MAXIMUM_WAIT_OBJECTS) {
2939 wait->handles [count] = background_change_event;
2943 MONO_PREPARE_BLOCKING;
2944 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2945 MONO_FINISH_BLOCKING;
2947 if(ret==WAIT_FAILED) {
2948 /* See the comment in build_wait_tids() */
2949 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2953 for(i=0; i<wait->num; i++)
2954 CloseHandle (wait->handles[i]);
2956 if (ret == WAIT_TIMEOUT)
2959 if (ret < wait->num) {
2960 gsize tid = wait->threads[ret]->tid;
2961 mono_threads_lock ();
2962 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2963 /* See comment in wait_for_tids about thread cleanup */
2964 mono_threads_unlock ();
2965 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2966 thread_cleanup (wait->threads [ret]);
2968 mono_threads_unlock ();
2972 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2974 struct wait_data *wait=(struct wait_data *)user;
2976 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2978 MonoInternalThread *thread=(MonoInternalThread *)value;
2980 /* Ignore background threads, we abort them later */
2981 /* Do not lock here since it is not needed and the caller holds threads_lock */
2982 if (thread->state & ThreadState_Background) {
2983 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2984 return; /* just leave, ignore */
2987 if (mono_gc_is_finalizer_internal_thread (thread)) {
2988 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2992 if (thread == mono_thread_internal_current ()) {
2993 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2997 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2998 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3002 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3003 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3007 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3008 if (handle == NULL) {
3009 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3013 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3014 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3015 wait->handles[wait->num]=handle;
3016 wait->threads[wait->num]=thread;
3019 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3021 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3026 /* Just ignore the rest, we can't do anything with
3033 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3035 struct wait_data *wait=(struct wait_data *)user;
3036 MonoNativeThreadId self = mono_native_thread_id_get ();
3037 MonoInternalThread *thread = (MonoInternalThread *)value;
3040 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3043 /* The finalizer thread is not a background thread */
3044 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3045 && (thread->state & ThreadState_Background) != 0
3046 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3048 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3052 /* printf ("A: %d\n", wait->num); */
3053 wait->handles[wait->num]=thread->handle;
3054 wait->threads[wait->num]=thread;
3057 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3058 mono_thread_internal_stop (thread);
3062 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3063 && !mono_gc_is_finalizer_internal_thread (thread);
3067 * mono_threads_set_shutting_down:
3069 * Is called by a thread that wants to shut down Mono. If the runtime is already
3070 * shutting down, the calling thread is suspended/stopped, and this function never
3074 mono_threads_set_shutting_down (void)
3076 MonoInternalThread *current_thread = mono_thread_internal_current ();
3078 mono_threads_lock ();
3080 if (shutting_down) {
3081 mono_threads_unlock ();
3083 /* Make sure we're properly suspended/stopped */
3085 LOCK_THREAD (current_thread);
3087 if ((current_thread->state & ThreadState_SuspendRequested) ||
3088 (current_thread->state & ThreadState_AbortRequested) ||
3089 (current_thread->state & ThreadState_StopRequested)) {
3090 UNLOCK_THREAD (current_thread);
3091 mono_thread_execute_interruption ();
3093 current_thread->state |= ThreadState_Stopped;
3094 UNLOCK_THREAD (current_thread);
3097 /*since we're killing the thread, unset the current domain.*/
3098 mono_domain_unset ();
3100 /* Wake up other threads potentially waiting for us */
3101 mono_thread_info_exit ();
3103 shutting_down = TRUE;
3105 /* Not really a background state change, but this will
3106 * interrupt the main thread if it is waiting for all
3107 * the other threads.
3109 SetEvent (background_change_event);
3111 mono_threads_unlock ();
3115 void mono_thread_manage (void)
3117 struct wait_data wait_data;
3118 struct wait_data *wait = &wait_data;
3120 memset (wait, 0, sizeof (struct wait_data));
3121 /* join each thread that's still running */
3122 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3124 mono_threads_lock ();
3126 THREAD_DEBUG (g_message("%s: No threads", __func__));
3127 mono_threads_unlock ();
3130 mono_threads_unlock ();
3133 mono_threads_lock ();
3134 if (shutting_down) {
3135 /* somebody else is shutting down */
3136 mono_threads_unlock ();
3139 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3140 mono_g_hash_table_foreach (threads, print_tids, NULL));
3142 ResetEvent (background_change_event);
3144 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3145 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3146 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3147 mono_threads_unlock ();
3149 /* Something to wait for */
3150 wait_for_tids_or_state_change (wait, INFINITE);
3152 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3153 } while(wait->num>0);
3155 /* Mono is shutting down, so just wait for the end */
3156 if (!mono_runtime_try_shutdown ()) {
3157 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3158 mono_thread_suspend (mono_thread_internal_current ());
3159 mono_thread_execute_interruption ();
3163 * Remove everything but the finalizer thread and self.
3164 * Also abort all the background threads
3167 mono_threads_lock ();
3170 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3171 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3172 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3174 mono_threads_unlock ();
3176 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3178 /* Something to wait for */
3179 wait_for_tids (wait, INFINITE);
3181 } while (wait->num > 0);
3184 * give the subthreads a chance to really quit (this is mainly needed
3185 * to get correct user and system times from getrusage/wait/time(1)).
3186 * This could be removed if we avoid pthread_detach() and use pthread_join().
3188 mono_thread_info_yield ();
3192 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3194 MonoInternalThread *thread = (MonoInternalThread*)value;
3195 struct wait_data *wait = (struct wait_data*)user_data;
3199 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3201 * This needs no locking.
3203 if ((thread->state & ThreadState_Suspended) != 0 ||
3204 (thread->state & ThreadState_Stopped) != 0)
3207 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3208 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3212 wait->handles [wait->num] = handle;
3213 wait->threads [wait->num] = thread;
3219 * mono_thread_suspend_all_other_threads:
3221 * Suspend all managed threads except the finalizer thread and this thread. It is
3222 * not possible to resume them later.
3224 void mono_thread_suspend_all_other_threads (void)
3226 struct wait_data wait_data;
3227 struct wait_data *wait = &wait_data;
3229 MonoNativeThreadId self = mono_native_thread_id_get ();
3230 guint32 eventidx = 0;
3231 gboolean starting, finished;
3233 memset (wait, 0, sizeof (struct wait_data));
3235 * The other threads could be in an arbitrary state at this point, i.e.
3236 * they could be starting up, shutting down etc. This means that there could be
3237 * threads which are not even in the threads hash table yet.
3241 * First we set a barrier which will be checked by all threads before they
3242 * are added to the threads hash table, and they will exit if the flag is set.
3243 * This ensures that no threads could be added to the hash later.
3244 * We will use shutting_down as the barrier for now.
3246 g_assert (shutting_down);
3249 * We make multiple calls to WaitForMultipleObjects since:
3250 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3251 * - some threads could exit without becoming suspended
3256 * Make a copy of the hashtable since we can't do anything with
3257 * threads while threads_mutex is held.
3260 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3261 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3262 mono_threads_lock ();
3263 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3264 mono_threads_unlock ();
3267 /* Get the suspended events that we'll be waiting for */
3268 for (i = 0; i < wait->num; ++i) {
3269 MonoInternalThread *thread = wait->threads [i];
3271 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3272 || mono_gc_is_finalizer_internal_thread (thread)
3273 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3275 //CloseHandle (wait->handles [i]);
3276 wait->threads [i] = NULL; /* ignore this thread in next loop */
3280 LOCK_THREAD (thread);
3282 if ((thread->state & ThreadState_Suspended) != 0 ||
3283 (thread->state & ThreadState_StopRequested) != 0 ||
3284 (thread->state & ThreadState_Stopped) != 0) {
3285 UNLOCK_THREAD (thread);
3286 CloseHandle (wait->handles [i]);
3287 wait->threads [i] = NULL; /* ignore this thread in next loop */
3293 /* Convert abort requests into suspend requests */
3294 if ((thread->state & ThreadState_AbortRequested) != 0)
3295 thread->state &= ~ThreadState_AbortRequested;
3297 thread->state |= ThreadState_SuspendRequested;
3299 UNLOCK_THREAD (thread);
3301 /* Signal the thread to suspend */
3302 suspend_thread_internal (thread, TRUE);
3304 if (eventidx <= 0) {
3306 * If there are threads which are starting up, we wait until they
3307 * are suspended when they try to register in the threads hash.
3308 * This is guaranteed to finish, since the threads which can create new
3309 * threads get suspended after a while.
3310 * FIXME: The finalizer thread can still create new threads.
3312 mono_threads_lock ();
3313 if (threads_starting_up)
3314 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3317 mono_threads_unlock ();
3319 mono_thread_info_sleep (100, NULL);
3327 MonoInternalThread *thread;
3328 MonoStackFrameInfo *frames;
3329 int nframes, max_frames;
3330 int nthreads, max_threads;
3331 MonoInternalThread **threads;
3332 } ThreadDumpUserData;
3334 static gboolean thread_dump_requested;
3336 /* This needs to be async safe */
3338 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3340 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3342 if (ud->nframes < ud->max_frames) {
3343 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3350 /* This needs to be async safe */
3351 static SuspendThreadResult
3352 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3354 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3355 MonoInternalThread *thread = user_data->thread;
3358 /* This no longer works with remote unwinding */
3360 wapi_desc = wapi_current_thread_desc ();
3361 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3366 if (thread == mono_thread_internal_current ())
3367 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3369 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3371 return MonoResumeThread;
3375 int nthreads, max_threads;
3376 MonoInternalThread **threads;
3377 } CollectThreadsUserData;
3380 collect_thread (gpointer key, gpointer value, gpointer user)
3382 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3383 MonoInternalThread *thread = (MonoInternalThread *)value;
3385 if (ud->nthreads < ud->max_threads)
3386 ud->threads [ud->nthreads ++] = thread;
3390 * Collect running threads into the THREADS array.
3391 * THREADS should be an array allocated on the stack.
3394 collect_threads (MonoInternalThread **thread_array, int max_threads)
3396 CollectThreadsUserData ud;
3398 memset (&ud, 0, sizeof (ud));
3399 /* This array contains refs, but its on the stack, so its ok */
3400 ud.threads = thread_array;
3401 ud.max_threads = max_threads;
3403 mono_threads_lock ();
3404 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3405 mono_threads_unlock ();
3411 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3413 GString* text = g_string_new (0);
3415 GError *error = NULL;
3418 ud->thread = thread;
3421 /* Collect frames for the thread */
3422 if (thread == mono_thread_internal_current ()) {
3423 get_thread_dump (mono_thread_info_current (), ud);
3425 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3429 * Do all the non async-safe work outside of get_thread_dump.
3432 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3434 g_string_append_printf (text, "\n\"%s\"", name);
3437 else if (thread->threadpool_thread) {
3438 g_string_append (text, "\n\"<threadpool thread>\"");
3440 g_string_append (text, "\n\"<unnamed thread>\"");
3443 for (i = 0; i < ud->nframes; ++i) {
3444 MonoStackFrameInfo *frame = &ud->frames [i];
3445 MonoMethod *method = NULL;
3447 if (frame->type == FRAME_TYPE_MANAGED)
3448 method = mono_jit_info_get_method (frame->ji);
3451 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3452 g_string_append_printf (text, " %s\n", location);
3455 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3459 fprintf (stdout, "%s", text->str);
3461 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3462 OutputDebugStringA(text->str);
3465 g_string_free (text, TRUE);
3470 mono_threads_perform_thread_dump (void)
3472 ThreadDumpUserData ud;
3473 MonoInternalThread *thread_array [128];
3474 int tindex, nthreads;
3476 if (!thread_dump_requested)
3479 printf ("Full thread dump:\n");
3481 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3482 nthreads = collect_threads (thread_array, 128);
3484 memset (&ud, 0, sizeof (ud));
3485 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3486 ud.max_frames = 256;
3488 for (tindex = 0; tindex < nthreads; ++tindex)
3489 dump_thread (thread_array [tindex], &ud);
3493 thread_dump_requested = FALSE;
3496 /* Obtain the thread dump of all threads */
3498 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3500 ThreadDumpUserData ud;
3501 MonoInternalThread *thread_array [128];
3502 MonoDomain *domain = mono_domain_get ();
3503 MonoDebugSourceLocation *location;
3504 int tindex, nthreads;
3506 *out_threads = NULL;
3507 *out_stack_frames = NULL;
3509 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3510 nthreads = collect_threads (thread_array, 128);
3512 memset (&ud, 0, sizeof (ud));
3513 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3514 ud.max_frames = 256;
3516 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3517 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3519 for (tindex = 0; tindex < nthreads; ++tindex) {
3520 MonoInternalThread *thread = thread_array [tindex];
3521 MonoArray *thread_frames;
3527 /* Collect frames for the thread */
3528 if (thread == mono_thread_internal_current ()) {
3529 get_thread_dump (mono_thread_info_current (), &ud);
3531 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3534 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3536 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3537 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3539 for (i = 0; i < ud.nframes; ++i) {
3540 MonoStackFrameInfo *frame = &ud.frames [i];
3541 MonoMethod *method = NULL;
3542 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
3544 sf->native_offset = frame->native_offset;
3546 if (frame->type == FRAME_TYPE_MANAGED)
3547 method = mono_jit_info_get_method (frame->ji);
3550 sf->method_address = (gsize) frame->ji->code_start;
3552 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3554 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3556 sf->il_offset = location->il_offset;
3558 if (location && location->source_file) {
3559 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3560 sf->line = location->row;
3561 sf->column = location->column;
3563 mono_debug_free_source_location (location);
3568 mono_array_setref (thread_frames, i, sf);
3576 * mono_threads_request_thread_dump:
3578 * Ask all threads except the current to print their stacktrace to stdout.
3581 mono_threads_request_thread_dump (void)
3583 /*The new thread dump code runs out of the finalizer thread. */
3584 thread_dump_requested = TRUE;
3585 mono_gc_finalize_notify ();
3590 gint allocated; /* +1 so that refs [allocated] == NULL */
3594 typedef struct ref_stack RefStack;
3597 ref_stack_new (gint initial_size)
3601 initial_size = MAX (initial_size, 16) + 1;
3602 rs = g_new0 (RefStack, 1);
3603 rs->refs = g_new0 (gpointer, initial_size);
3604 rs->allocated = initial_size;
3609 ref_stack_destroy (gpointer ptr)
3611 RefStack *rs = (RefStack *)ptr;
3620 ref_stack_push (RefStack *rs, gpointer ptr)
3622 g_assert (rs != NULL);
3624 if (rs->bottom >= rs->allocated) {
3625 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3626 rs->allocated <<= 1;
3627 rs->refs [rs->allocated] = NULL;
3629 rs->refs [rs->bottom++] = ptr;
3633 ref_stack_pop (RefStack *rs)
3635 if (rs == NULL || rs->bottom == 0)
3639 rs->refs [rs->bottom] = NULL;
3643 ref_stack_find (RefStack *rs, gpointer ptr)
3650 for (refs = rs->refs; refs && *refs; refs++) {
3658 * mono_thread_push_appdomain_ref:
3660 * Register that the current thread may have references to objects in domain
3661 * @domain on its stack. Each call to this function should be paired with a
3662 * call to pop_appdomain_ref.
3665 mono_thread_push_appdomain_ref (MonoDomain *domain)
3667 MonoInternalThread *thread = mono_thread_internal_current ();
3670 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3671 SPIN_LOCK (thread->lock_thread_id);
3672 if (thread->appdomain_refs == NULL)
3673 thread->appdomain_refs = ref_stack_new (16);
3674 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3675 SPIN_UNLOCK (thread->lock_thread_id);
3680 mono_thread_pop_appdomain_ref (void)
3682 MonoInternalThread *thread = mono_thread_internal_current ();
3685 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3686 SPIN_LOCK (thread->lock_thread_id);
3687 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3688 SPIN_UNLOCK (thread->lock_thread_id);
3693 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3696 SPIN_LOCK (thread->lock_thread_id);
3697 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3698 SPIN_UNLOCK (thread->lock_thread_id);
3703 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3705 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3708 typedef struct abort_appdomain_data {
3709 struct wait_data wait;
3711 } abort_appdomain_data;
3714 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3716 MonoInternalThread *thread = (MonoInternalThread*)value;
3717 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3718 MonoDomain *domain = data->domain;
3720 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3721 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3723 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3724 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3727 data->wait.handles [data->wait.num] = handle;
3728 data->wait.threads [data->wait.num] = thread;
3731 /* Just ignore the rest, we can't do anything with
3739 * mono_threads_abort_appdomain_threads:
3741 * Abort threads which has references to the given appdomain.
3744 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3746 #ifdef __native_client__
3750 abort_appdomain_data user_data;
3752 int orig_timeout = timeout;
3755 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3757 start_time = mono_msec_ticks ();
3759 mono_threads_lock ();
3761 user_data.domain = domain;
3762 user_data.wait.num = 0;
3763 /* This shouldn't take any locks */
3764 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3765 mono_threads_unlock ();
3767 if (user_data.wait.num > 0) {
3768 /* Abort the threads outside the threads lock */
3769 for (i = 0; i < user_data.wait.num; ++i)
3770 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3773 * We should wait for the threads either to abort, or to leave the
3774 * domain. We can't do the latter, so we wait with a timeout.
3776 wait_for_tids (&user_data.wait, 100);
3779 /* Update remaining time */
3780 timeout -= mono_msec_ticks () - start_time;
3781 start_time = mono_msec_ticks ();
3783 if (orig_timeout != -1 && timeout < 0)
3786 while (user_data.wait.num > 0);
3788 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3794 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3796 MonoInternalThread *thread = (MonoInternalThread*)value;
3797 MonoDomain *domain = (MonoDomain*)user_data;
3800 /* No locking needed here */
3801 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3803 if (thread->cached_culture_info) {
3804 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3805 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3806 if (obj && obj->vtable->domain == domain)
3807 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3813 * mono_threads_clear_cached_culture:
3815 * Clear the cached_current_culture from all threads if it is in the
3819 mono_threads_clear_cached_culture (MonoDomain *domain)
3821 mono_threads_lock ();
3822 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3823 mono_threads_unlock ();
3827 * mono_thread_get_undeniable_exception:
3829 * Return an exception which needs to be raised when leaving a catch clause.
3830 * This is used for undeniable exception propagation.
3833 mono_thread_get_undeniable_exception (void)
3835 MonoInternalThread *thread = mono_thread_internal_current ();
3837 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3839 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3840 * exception if the thread no longer references a dying appdomain.
3842 thread->abort_exc->trace_ips = NULL;
3843 thread->abort_exc->stack_trace = NULL;
3844 return thread->abort_exc;
3850 #if MONO_SMALL_CONFIG
3851 #define NUM_STATIC_DATA_IDX 4
3852 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3856 #define NUM_STATIC_DATA_IDX 8
3857 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3858 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3862 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3863 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3866 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3868 gpointer *static_data = (gpointer *)addr;
3870 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3871 void **ptr = (void **)static_data [i];
3876 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3877 void **p = ptr + idx;
3880 mark_func ((MonoObject**)p, gc_data);
3886 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3888 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3892 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3894 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3898 * mono_alloc_static_data
3900 * Allocate memory blocks for storing threads or context static data
3903 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3905 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3908 gpointer* static_data = *static_data_ptr;
3910 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3911 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3913 if (mono_gc_user_markers_supported ()) {
3914 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3915 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3917 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3918 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3921 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3922 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3923 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3924 *static_data_ptr = static_data;
3925 static_data [0] = static_data;
3928 for (i = 1; i <= idx; ++i) {
3929 if (static_data [i])
3932 if (mono_gc_user_markers_supported ())
3933 static_data [i] = g_malloc0 (static_data_size [i]);
3935 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3936 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3937 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3942 mono_free_static_data (gpointer* static_data)
3945 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3946 gpointer p = static_data [i];
3950 * At this point, the static data pointer array is still registered with the
3951 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3952 * data. Freeing the individual arrays without first nulling their slots
3953 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3954 * such an already freed array. See bug #13813.
3956 static_data [i] = NULL;
3957 mono_memory_write_barrier ();
3958 if (mono_gc_user_markers_supported ())
3961 mono_gc_free_fixed (p);
3963 mono_gc_free_fixed (static_data);
3967 * mono_init_static_data_info
3969 * Initializes static data counters
3971 static void mono_init_static_data_info (StaticDataInfo *static_data)
3973 static_data->idx = 0;
3974 static_data->offset = 0;
3975 static_data->freelist = NULL;
3979 * mono_alloc_static_data_slot
3981 * Generates an offset for static data. static_data contains the counters
3982 * used to generate it.
3985 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3987 if (!static_data->idx && !static_data->offset) {
3989 * we use the first chunk of the first allocation also as
3990 * an array for the rest of the data
3992 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3994 static_data->offset += align - 1;
3995 static_data->offset &= ~(align - 1);
3996 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3997 static_data->idx ++;
3998 g_assert (size <= static_data_size [static_data->idx]);
3999 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4000 static_data->offset = 0;
4002 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4003 static_data->offset += size;
4008 * ensure thread static fields already allocated are valid for thread
4009 * This function is called when a thread is created or on thread attach.
4012 thread_adjust_static_data (MonoInternalThread *thread)
4014 mono_threads_lock ();
4015 if (thread_static_info.offset || thread_static_info.idx > 0) {
4016 /* get the current allocated size */
4017 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4018 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4020 mono_threads_unlock ();
4024 * LOCKING: requires that threads_mutex is held
4027 context_adjust_static_data (MonoAppContext *ctx)
4029 if (context_static_info.offset || context_static_info.idx > 0) {
4030 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4031 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4032 ctx->data->static_data = ctx->static_data;
4037 * LOCKING: requires that threads_mutex is held
4040 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4042 MonoInternalThread *thread = (MonoInternalThread *)value;
4043 guint32 offset = GPOINTER_TO_UINT (user);
4045 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4049 * LOCKING: requires that threads_mutex is held
4052 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4054 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4059 guint32 offset = GPOINTER_TO_UINT (user);
4060 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4061 ctx->data->static_data = ctx->static_data;
4064 static StaticDataFreeList*
4065 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4067 StaticDataFreeList* prev = NULL;
4068 StaticDataFreeList* tmp = static_data->freelist;
4070 if (tmp->size == size) {
4072 prev->next = tmp->next;
4074 static_data->freelist = tmp->next;
4083 #if SIZEOF_VOID_P == 4
4090 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4092 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4094 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4095 MonoBitSet *rb = sets [idx];
4096 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4097 offset /= sizeof (uintptr_t);
4098 /* offset is now the bitmap offset */
4099 for (int i = 0; i < numbits; ++i) {
4100 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4101 mono_bitset_set_fast (rb, offset + i);
4106 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4108 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4109 MonoBitSet *rb = sets [idx];
4110 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4111 offset /= sizeof (uintptr_t);
4112 /* offset is now the bitmap offset */
4113 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4114 mono_bitset_clear_fast (rb, offset + i);
4118 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4120 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4122 StaticDataInfo *info;
4125 if (static_type == SPECIAL_STATIC_THREAD) {
4126 info = &thread_static_info;
4127 sets = thread_reference_bitmaps;
4129 info = &context_static_info;
4130 sets = context_reference_bitmaps;
4133 mono_threads_lock ();
4135 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4139 offset = item->offset;
4142 offset = mono_alloc_static_data_slot (info, size, align);
4145 update_reference_bitmap (sets, offset, bitmap, numbits);
4147 if (static_type == SPECIAL_STATIC_THREAD) {
4148 /* This can be called during startup */
4149 if (threads != NULL)
4150 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4152 if (contexts != NULL)
4153 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4155 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4158 mono_threads_unlock ();
4164 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4166 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4168 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4169 return get_thread_static_data (thread, offset);
4171 return get_context_static_data (thread->current_appcontext, offset);
4176 mono_get_special_static_data (guint32 offset)
4178 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4187 * LOCKING: requires that threads_mutex is held
4190 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4192 MonoInternalThread *thread = (MonoInternalThread *)value;
4193 OffsetSize *data = (OffsetSize *)user;
4194 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4195 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4198 if (!thread->static_data || !thread->static_data [idx])
4200 ptr = ((char*) thread->static_data [idx]) + off;
4201 mono_gc_bzero_atomic (ptr, data->size);
4205 * LOCKING: requires that threads_mutex is held
4208 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4210 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4215 OffsetSize *data = (OffsetSize *)user;
4216 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4217 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4220 if (!ctx->static_data || !ctx->static_data [idx])
4223 ptr = ((char*) ctx->static_data [idx]) + off;
4224 mono_gc_bzero_atomic (ptr, data->size);
4228 do_free_special_slot (guint32 offset, guint32 size)
4230 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4232 StaticDataInfo *info;
4234 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4235 info = &thread_static_info;
4236 sets = thread_reference_bitmaps;
4238 info = &context_static_info;
4239 sets = context_reference_bitmaps;
4242 guint32 data_offset = offset;
4243 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4244 OffsetSize data = { data_offset, size };
4246 clear_reference_bitmap (sets, data.offset, data.size);
4248 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4249 if (threads != NULL)
4250 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4252 if (contexts != NULL)
4253 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4256 if (!mono_runtime_is_shutting_down ()) {
4257 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4259 item->offset = offset;
4262 item->next = info->freelist;
4263 info->freelist = item;
4268 do_free_special (gpointer key, gpointer value, gpointer data)
4270 MonoClassField *field = (MonoClassField *)key;
4271 guint32 offset = GPOINTER_TO_UINT (value);
4274 size = mono_type_size (field->type, &align);
4275 do_free_special_slot (offset, size);
4279 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4281 mono_threads_lock ();
4283 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4285 mono_threads_unlock ();
4289 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4291 /* Only ever called for ThreadLocal instances */
4292 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4294 mono_threads_lock ();
4295 do_free_special_slot (offset, size);
4296 mono_threads_unlock ();
4300 static void CALLBACK dummy_apc (ULONG_PTR param)
4306 * mono_thread_execute_interruption
4308 * Performs the operation that the requested thread state requires (abort,
4311 static MonoException*
4312 mono_thread_execute_interruption (void)
4314 MonoInternalThread *thread = mono_thread_internal_current ();
4316 LOCK_THREAD (thread);
4318 /* MonoThread::interruption_requested can only be changed with atomics */
4319 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4320 /* this will consume pending APC calls */
4322 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4324 InterlockedDecrement (&thread_interruption_requested);
4326 /* Clear the interrupted flag of the thread so it can wait again */
4327 mono_thread_info_clear_self_interrupt ();
4330 if ((thread->state & ThreadState_AbortRequested) != 0) {
4331 UNLOCK_THREAD (thread);
4332 if (thread->abort_exc == NULL) {
4334 * This might be racy, but it has to be called outside the lock
4335 * since it calls managed code.
4337 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4339 return thread->abort_exc;
4341 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4342 self_suspend_internal (thread);
4345 else if ((thread->state & ThreadState_StopRequested) != 0) {
4346 /* FIXME: do this through the JIT? */
4348 UNLOCK_THREAD (thread);
4350 mono_thread_exit ();
4352 } else if (thread->pending_exception) {
4355 exc = thread->pending_exception;
4356 thread->pending_exception = NULL;
4358 UNLOCK_THREAD (thread);
4360 } else if (thread->thread_interrupt_requested) {
4362 thread->thread_interrupt_requested = FALSE;
4363 UNLOCK_THREAD (thread);
4365 return(mono_get_exception_thread_interrupted ());
4368 UNLOCK_THREAD (thread);
4374 * mono_thread_request_interruption
4376 * A signal handler can call this method to request the interruption of a
4377 * thread. The result of the interruption will depend on the current state of
4378 * the thread. If the result is an exception that needs to be throw, it is
4379 * provided as return value.
4382 mono_thread_request_interruption (gboolean running_managed)
4384 MonoInternalThread *thread = mono_thread_internal_current ();
4386 /* The thread may already be stopping */
4391 if (thread->interrupt_on_stop &&
4392 thread->state & ThreadState_StopRequested &&
4393 thread->state & ThreadState_Background)
4397 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4399 InterlockedIncrement (&thread_interruption_requested);
4401 if (!running_managed || is_running_protected_wrapper ()) {
4402 /* Can't stop while in unmanaged code. Increase the global interruption
4403 request count. When exiting the unmanaged method the count will be
4404 checked and the thread will be interrupted. */
4406 if (mono_thread_notify_pending_exc_fn && !running_managed)
4407 /* The JIT will notify the thread about the interruption */
4408 /* This shouldn't take any locks */
4409 mono_thread_notify_pending_exc_fn (NULL);
4411 /* this will awake the thread if it is in WaitForSingleObject
4413 /* Our implementation of this function ignores the func argument */
4415 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4417 mono_thread_info_self_interrupt ();
4422 return mono_thread_execute_interruption ();
4426 /*This function should be called by a thread after it has exited all of
4427 * its handle blocks at interruption time.*/
4429 mono_thread_resume_interruption (void)
4431 MonoInternalThread *thread = mono_thread_internal_current ();
4432 gboolean still_aborting;
4434 /* The thread may already be stopping */
4438 LOCK_THREAD (thread);
4439 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4440 UNLOCK_THREAD (thread);
4442 /*This can happen if the protected block called Thread::ResetAbort*/
4443 if (!still_aborting)
4446 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4448 InterlockedIncrement (&thread_interruption_requested);
4450 mono_thread_info_self_interrupt ();
4452 return mono_thread_execute_interruption ();
4455 gboolean mono_thread_interruption_requested ()
4457 if (thread_interruption_requested) {
4458 MonoInternalThread *thread = mono_thread_internal_current ();
4459 /* The thread may already be stopping */
4461 return (thread->interruption_requested);
4466 static MonoException*
4467 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4469 MonoInternalThread *thread = mono_thread_internal_current ();
4471 /* The thread may already be stopping */
4475 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4476 MonoException* exc = mono_thread_execute_interruption ();
4484 * Performs the interruption of the current thread, if one has been requested,
4485 * and the thread is not running a protected wrapper.
4486 * Return the exception which needs to be thrown, if any.
4489 mono_thread_interruption_checkpoint (void)
4491 return mono_thread_interruption_checkpoint_request (FALSE);
4495 * Performs the interruption of the current thread, if one has been requested.
4496 * Return the exception which needs to be thrown, if any.
4499 mono_thread_force_interruption_checkpoint_noraise (void)
4501 return mono_thread_interruption_checkpoint_request (TRUE);
4505 * mono_thread_get_and_clear_pending_exception:
4507 * Return any pending exceptions for the current thread and clear it as a side effect.
4510 mono_thread_get_and_clear_pending_exception (void)
4512 MonoInternalThread *thread = mono_thread_internal_current ();
4514 /* The thread may already be stopping */
4518 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4519 return mono_thread_execute_interruption ();
4522 if (thread->pending_exception) {
4523 MonoException *exc = thread->pending_exception;
4525 thread->pending_exception = NULL;
4533 * mono_set_pending_exception:
4535 * Set the pending exception of the current thread to EXC.
4536 * The exception will be thrown when execution returns to managed code.
4539 mono_set_pending_exception (MonoException *exc)
4541 MonoInternalThread *thread = mono_thread_internal_current ();
4543 /* The thread may already be stopping */
4547 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4549 mono_thread_request_interruption (FALSE);
4553 * mono_thread_interruption_request_flag:
4555 * Returns the address of a flag that will be non-zero if an interruption has
4556 * been requested for a thread. The thread to interrupt may not be the current
4557 * thread, so an additional call to mono_thread_interruption_requested() or
4558 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4561 gint32* mono_thread_interruption_request_flag ()
4563 return &thread_interruption_requested;
4567 mono_thread_init_apartment_state (void)
4570 MonoInternalThread* thread = mono_thread_internal_current ();
4572 /* Positive return value indicates success, either
4573 * S_OK if this is first CoInitialize call, or
4574 * S_FALSE if CoInitialize already called, but with same
4575 * threading model. A negative value indicates failure,
4576 * probably due to trying to change the threading model.
4578 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4579 ? COINIT_APARTMENTTHREADED
4580 : COINIT_MULTITHREADED) < 0) {
4581 thread->apartment_state = ThreadApartmentState_Unknown;
4587 mono_thread_cleanup_apartment_state (void)
4590 MonoInternalThread* thread = mono_thread_internal_current ();
4592 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4599 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4601 LOCK_THREAD (thread);
4602 thread->state |= state;
4603 UNLOCK_THREAD (thread);
4607 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4609 LOCK_THREAD (thread);
4610 thread->state &= ~state;
4611 UNLOCK_THREAD (thread);
4615 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4617 gboolean ret = FALSE;
4619 LOCK_THREAD (thread);
4621 if ((thread->state & test) != 0) {
4625 UNLOCK_THREAD (thread);
4630 static gboolean has_tls_get = FALSE;
4633 mono_runtime_set_has_tls_get (gboolean val)
4639 mono_runtime_has_tls_get (void)
4645 self_interrupt_thread (void *_unused)
4647 MonoThreadInfo *info = mono_thread_info_current ();
4648 MonoException *exc = mono_thread_execute_interruption ();
4649 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4650 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. */
4651 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4655 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4659 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4663 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4665 MonoJitInfo **dest = (MonoJitInfo **)data;
4671 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4673 MonoJitInfo *ji = NULL;
4676 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4681 MonoInternalThread *thread;
4682 gboolean install_async_abort;
4683 MonoThreadInfoInterruptToken *interrupt_token;
4686 static SuspendThreadResult
4687 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4689 AbortThreadData *data = (AbortThreadData *)ud;
4690 MonoInternalThread *thread = data->thread;
4691 MonoJitInfo *ji = NULL;
4692 gboolean protected_wrapper;
4693 gboolean running_managed;
4695 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4696 return MonoResumeThread;
4698 /*someone is already interrupting it*/
4699 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4700 return MonoResumeThread;
4702 InterlockedIncrement (&thread_interruption_requested);
4704 ji = mono_thread_info_get_last_managed (info);
4705 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4706 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4708 if (!protected_wrapper && running_managed) {
4709 /*We are in managed code*/
4710 /*Set the thread to call */
4711 if (data->install_async_abort)
4712 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4713 return MonoResumeThread;
4715 if (mono_thread_notify_pending_exc_fn)
4716 /* The JIT will notify the thread about the interruption */
4717 mono_thread_notify_pending_exc_fn (info);
4720 * This will cause waits to be broken.
4721 * It will also prevent the thread from entering a wait, so if the thread returns
4722 * from the wait before it receives the abort signal, it will just spin in the wait
4723 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4726 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4728 return MonoResumeThread;
4733 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4735 AbortThreadData data = { 0 };
4736 data.thread = thread;
4737 data.install_async_abort = install_async_abort;
4740 FIXME this is insanely broken, it doesn't cause interruption to happen
4741 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4743 if (thread == mono_thread_internal_current ()) {
4744 /* Do it synchronously */
4745 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4747 mono_raise_exception (exc);
4749 mono_thread_info_self_interrupt ();
4754 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4755 if (data.interrupt_token)
4756 mono_thread_info_finish_interrupt (data.interrupt_token);
4757 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4761 MonoInternalThread *thread;
4763 MonoThreadInfoInterruptToken *interrupt_token;
4764 } SuspendThreadData;
4766 static SuspendThreadResult
4767 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4769 SuspendThreadData *data = (SuspendThreadData *)ud;
4770 MonoInternalThread *thread = data->thread;
4771 MonoJitInfo *ji = NULL;
4772 gboolean protected_wrapper;
4773 gboolean running_managed;
4775 ji = mono_thread_info_get_last_managed (info);
4776 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4777 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4779 if (running_managed && !protected_wrapper) {
4780 thread->state &= ~ThreadState_SuspendRequested;
4781 thread->state |= ThreadState_Suspended;
4782 return KeepSuspended;
4784 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4785 InterlockedIncrement (&thread_interruption_requested);
4786 if (data->interrupt)
4787 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4789 if (mono_thread_notify_pending_exc_fn && !running_managed)
4790 /* The JIT will notify the thread about the interruption */
4791 mono_thread_notify_pending_exc_fn (info);
4792 return MonoResumeThread;
4797 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4799 LOCK_THREAD (thread);
4800 if (thread == mono_thread_internal_current ()) {
4801 mono_thread_info_begin_self_suspend ();
4802 //XXX replace this with better named functions
4803 thread->state &= ~ThreadState_SuspendRequested;
4804 thread->state |= ThreadState_Suspended;
4805 UNLOCK_THREAD (thread);
4806 mono_thread_info_end_self_suspend ();
4808 SuspendThreadData data = { 0 };
4809 data.thread = thread;
4810 data.interrupt = interrupt;
4812 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4813 if (data.interrupt_token)
4814 mono_thread_info_finish_interrupt (data.interrupt_token);
4815 UNLOCK_THREAD (thread);
4819 /*This is called with @thread synch_cs held and it must release it*/
4821 self_suspend_internal (MonoInternalThread *thread)
4823 mono_thread_info_begin_self_suspend ();
4824 thread->state &= ~ThreadState_SuspendRequested;
4825 thread->state |= ThreadState_Suspended;
4826 UNLOCK_THREAD (thread);
4827 mono_thread_info_end_self_suspend ();
4832 * mono_thread_is_foreign:
4833 * @thread: the thread to query
4835 * This function allows one to determine if a thread was created by the mono runtime and has
4836 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4838 * Returns: true if @thread was not created by the runtime.
4841 mono_thread_is_foreign (MonoThread *thread)
4843 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4844 return info->runtime_thread == FALSE;
4848 * mono_add_joinable_thread:
4850 * Add TID to the list of joinable threads.
4851 * LOCKING: Acquires the threads lock.
4854 mono_threads_add_joinable_thread (gpointer tid)
4858 * We cannot detach from threads because it causes problems like
4859 * 2fd16f60/r114307. So we collect them and join them when
4860 * we have time (in he finalizer thread).
4862 joinable_threads_lock ();
4863 if (!joinable_threads)
4864 joinable_threads = g_hash_table_new (NULL, NULL);
4865 g_hash_table_insert (joinable_threads, tid, tid);
4866 joinable_thread_count ++;
4867 joinable_threads_unlock ();
4869 mono_gc_finalize_notify ();
4874 * mono_threads_join_threads:
4876 * Join all joinable threads. This is called from the finalizer thread.
4877 * LOCKING: Acquires the threads lock.
4880 mono_threads_join_threads (void)
4883 GHashTableIter iter;
4890 if (!joinable_thread_count)
4894 joinable_threads_lock ();
4896 if (g_hash_table_size (joinable_threads)) {
4897 g_hash_table_iter_init (&iter, joinable_threads);
4898 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4899 thread = (pthread_t)tid;
4900 g_hash_table_remove (joinable_threads, key);
4901 joinable_thread_count --;
4904 joinable_threads_unlock ();
4906 if (thread != pthread_self ())
4907 /* This shouldn't block */
4908 pthread_join (thread, NULL);
4919 * Wait for thread TID to exit.
4920 * LOCKING: Acquires the threads lock.
4923 mono_thread_join (gpointer tid)
4927 gboolean found = FALSE;
4929 joinable_threads_lock ();
4930 if (!joinable_threads)
4931 joinable_threads = g_hash_table_new (NULL, NULL);
4932 if (g_hash_table_lookup (joinable_threads, tid)) {
4933 g_hash_table_remove (joinable_threads, tid);
4934 joinable_thread_count --;
4937 joinable_threads_unlock ();
4940 thread = (pthread_t)tid;
4941 pthread_join (thread, NULL);
4946 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4948 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4949 mono_thread_interruption_checkpoint ();
4952 static inline gboolean
4953 is_appdomainunloaded_exception (MonoClass *klass)
4955 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4957 if (!app_domain_unloaded_exception_klass)
4958 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4959 g_assert (app_domain_unloaded_exception_klass);
4961 return klass == app_domain_unloaded_exception_klass;
4964 static inline gboolean
4965 is_threadabort_exception (MonoClass *klass)
4967 return klass == mono_defaults.threadabortexception_class;
4971 mono_thread_internal_unhandled_exception (MonoObject* exc)
4973 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4974 MonoClass *klass = exc->vtable->klass;
4975 if (is_threadabort_exception (klass)) {
4976 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4977 } else if (!is_appdomainunloaded_exception (klass)) {
4978 mono_unhandled_exception (exc);
4979 if (mono_environment_exitcode_get () == 1)
4986 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4988 mono_threads_get_thread_dump (out_threads, out_stack_traces);