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>
45 #include <mono/metadata/reflection-internals.h>
51 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
52 #define USE_TKILL_ON_ANDROID 1
55 #ifdef PLATFORM_ANDROID
58 #ifdef USE_TKILL_ON_ANDROID
59 extern int tkill (pid_t tid, int signal);
63 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
64 #define THREAD_DEBUG(a)
65 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
66 #define THREAD_WAIT_DEBUG(a)
67 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
68 #define LIBGC_DEBUG(a)
70 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
71 #define SPIN_LOCK(i) do { \
72 if (SPIN_TRYLOCK (i)) \
76 #define SPIN_UNLOCK(i) i = 0
78 #define LOCK_THREAD(thread) lock_thread((thread))
79 #define UNLOCK_THREAD(thread) unlock_thread((thread))
81 /* Provide this for systems with glib < 2.6 */
82 #ifndef G_GSIZE_FORMAT
83 # if GLIB_SIZEOF_LONG == 8
84 # define G_GSIZE_FORMAT "lu"
86 # define G_GSIZE_FORMAT "u"
92 guint32 (*func)(void *);
108 typedef struct _StaticDataFreeList StaticDataFreeList;
109 struct _StaticDataFreeList {
110 StaticDataFreeList *next;
118 StaticDataFreeList *freelist;
121 /* Number of cached culture objects in the MonoThread->cached_culture_info array
122 * (per-type): we use the first NUM entries for CultureInfo and the last for
123 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
125 #define NUM_CACHED_CULTURES 4
126 #define CULTURES_START_IDX 0
127 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
129 /* Controls access to the 'threads' hash table */
130 static void mono_threads_lock (void);
131 static void mono_threads_unlock (void);
132 static MonoCoopMutex threads_mutex;
134 /* Controls access to the 'joinable_threads' hash table */
135 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
136 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
137 static mono_mutex_t joinable_threads_mutex;
139 /* Holds current status of static data heap */
140 static StaticDataInfo thread_static_info;
141 static StaticDataInfo context_static_info;
143 /* The hash of existing threads (key is thread ID, value is
144 * MonoInternalThread*) that need joining before exit
146 static MonoGHashTable *threads=NULL;
148 /* List of app context GC handles.
149 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
151 static GHashTable *contexts = NULL;
153 /* Cleanup queue for contexts. */
154 static MonoReferenceQueue *context_queue;
157 * Threads which are starting up and they are not in the 'threads' hash yet.
158 * When handle_store is called for a thread, it will be removed from this hash table.
159 * Protected by mono_threads_lock ().
161 static MonoGHashTable *threads_starting_up = NULL;
163 /* The TLS key that holds the MonoObject assigned to each thread */
164 static MonoNativeTlsKey current_object_key;
167 /* Protected by the threads lock */
168 static GHashTable *joinable_threads;
169 static int joinable_thread_count;
171 #ifdef MONO_HAVE_FAST_TLS
172 /* we need to use both the Tls* functions and __thread because
173 * the gc needs to see all the threads
175 MONO_FAST_TLS_DECLARE(tls_current_object);
176 #define SET_CURRENT_OBJECT(x) do { \
177 MONO_FAST_TLS_SET (tls_current_object, x); \
178 mono_native_tls_set_value (current_object_key, x); \
180 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
182 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
183 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
186 /* function called at thread start */
187 static MonoThreadStartCB mono_thread_start_cb = NULL;
189 /* function called at thread attach */
190 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
192 /* function called at thread cleanup */
193 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
195 /* The default stack size for each thread */
196 static guint32 default_stacksize = 0;
197 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
199 static void thread_adjust_static_data (MonoInternalThread *thread);
200 static void context_adjust_static_data (MonoAppContext *ctx);
201 static void mono_free_static_data (gpointer* static_data);
202 static void mono_init_static_data_info (StaticDataInfo *static_data);
203 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
204 static gboolean mono_thread_resume (MonoInternalThread* thread);
205 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
206 static void self_abort_internal (void);
207 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
208 static void self_suspend_internal (void);
210 static MonoException* mono_thread_execute_interruption (void);
211 static void ref_stack_destroy (gpointer rs);
213 /* Spin lock for InterlockedXXX 64 bit functions */
214 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
215 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
216 static mono_mutex_t interlocked_mutex;
218 /* global count of thread interruptions requested */
219 static gint32 thread_interruption_requested = 0;
221 /* Event signaled when a thread changes its background mode */
222 static HANDLE background_change_event;
224 static gboolean shutting_down = FALSE;
226 static gint32 managed_thread_id_counter = 0;
228 /* Class lazy loading functions */
229 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
232 mono_threads_lock (void)
234 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
238 mono_threads_unlock (void)
240 mono_locks_coop_release (&threads_mutex, ThreadsLock);
245 get_next_managed_thread_id (void)
247 return InterlockedIncrement (&managed_thread_id_counter);
251 mono_thread_get_tls_key (void)
253 return current_object_key;
257 mono_thread_get_tls_offset (void)
260 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
264 static inline MonoNativeThreadId
265 thread_get_tid (MonoInternalThread *thread)
267 /* We store the tid as a guint64 to keep the object layout constant between platforms */
268 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
271 /* handle_store() and handle_remove() manage the array of threads that
272 * still need to be waited for when the main thread exits.
274 * If handle_store() returns FALSE the thread must not be started
275 * because Mono is shutting down.
277 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
279 mono_threads_lock ();
281 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
283 if (threads_starting_up)
284 mono_g_hash_table_remove (threads_starting_up, thread);
286 if (shutting_down && !force_attach) {
287 mono_threads_unlock ();
292 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
293 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
296 /* We don't need to duplicate thread->handle, because it is
297 * only closed when the thread object is finalized by the GC.
299 g_assert (thread->internal_thread);
300 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
301 thread->internal_thread);
303 mono_threads_unlock ();
308 static gboolean handle_remove(MonoInternalThread *thread)
311 gsize tid = thread->tid;
313 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
315 mono_threads_lock ();
318 /* We have to check whether the thread object for the
319 * tid is still the same in the table because the
320 * thread might have been destroyed and the tid reused
321 * in the meantime, in which case the tid would be in
322 * the table, but with another thread object.
324 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
325 mono_g_hash_table_remove (threads, (gpointer)tid);
334 mono_threads_unlock ();
336 /* Don't close the handle here, wait for the object finalizer
337 * to do it. Otherwise, the following race condition applies:
339 * 1) Thread exits (and handle_remove() closes the handle)
341 * 2) Some other handle is reassigned the same slot
343 * 3) Another thread tries to join the first thread, and
344 * blocks waiting for the reassigned handle to be signalled
345 * (which might never happen). This is possible, because the
346 * thread calling Join() still has a reference to the first
352 static void ensure_synch_cs_set (MonoInternalThread *thread)
354 MonoCoopMutex *synch_cs;
356 if (thread->synch_cs != NULL) {
360 synch_cs = g_new0 (MonoCoopMutex, 1);
361 mono_coop_mutex_init_recursive (synch_cs);
363 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
364 synch_cs, NULL) != NULL) {
365 /* Another thread must have installed this CS */
366 mono_coop_mutex_destroy (synch_cs);
372 lock_thread (MonoInternalThread *thread)
374 if (!thread->synch_cs)
375 ensure_synch_cs_set (thread);
377 g_assert (thread->synch_cs);
379 mono_coop_mutex_lock (thread->synch_cs);
383 unlock_thread (MonoInternalThread *thread)
385 mono_coop_mutex_unlock (thread->synch_cs);
389 * NOTE: this function can be called also for threads different from the current one:
390 * make sure no code called from it will ever assume it is run on the thread that is
391 * getting cleaned up.
393 static void thread_cleanup (MonoInternalThread *thread)
395 g_assert (thread != NULL);
397 if (thread->abort_state_handle) {
398 mono_gchandle_free (thread->abort_state_handle);
399 thread->abort_state_handle = 0;
401 thread->abort_exc = NULL;
402 thread->current_appcontext = NULL;
405 * This is necessary because otherwise we might have
406 * cross-domain references which will not get cleaned up when
407 * the target domain is unloaded.
409 if (thread->cached_culture_info) {
411 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
412 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
416 * thread->synch_cs can be NULL if this was called after
417 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
418 * This can happen only during shutdown.
419 * The shutting_down flag is not always set, so we can't assert on it.
421 if (thread->synch_cs)
422 LOCK_THREAD (thread);
424 thread->state |= ThreadState_Stopped;
425 thread->state &= ~ThreadState_Background;
427 if (thread->synch_cs)
428 UNLOCK_THREAD (thread);
431 An interruption request has leaked to cleanup. Adjust the global counter.
433 This can happen is the abort source thread finds the abortee (this) thread
434 in unmanaged code. If this thread never trips back to managed code or check
435 the local flag it will be left set and positively unbalance the global counter.
437 Leaving the counter unbalanced will cause a performance degradation since all threads
438 will now keep checking their local flags all the time.
440 if (InterlockedExchange (&thread->interruption_requested, 0))
441 InterlockedDecrement (&thread_interruption_requested);
443 /* if the thread is not in the hash it has been removed already */
444 if (!handle_remove (thread)) {
445 if (thread == mono_thread_internal_current ()) {
446 mono_domain_unset ();
447 mono_memory_barrier ();
449 /* This needs to be called even if handle_remove () fails */
450 if (mono_thread_cleanup_fn)
451 mono_thread_cleanup_fn (thread_get_tid (thread));
454 mono_release_type_locks (thread);
456 mono_profiler_thread_end (thread->tid);
458 if (thread == mono_thread_internal_current ()) {
460 * This will signal async signal handlers that the thread has exited.
461 * The profiler callback needs this to be set, so it cannot be done earlier.
463 mono_domain_unset ();
464 mono_memory_barrier ();
467 if (thread == mono_thread_internal_current ())
468 mono_thread_pop_appdomain_ref ();
470 thread->cached_culture_info = NULL;
472 mono_free_static_data (thread->static_data);
473 thread->static_data = NULL;
474 ref_stack_destroy (thread->appdomain_refs);
475 thread->appdomain_refs = NULL;
477 if (mono_thread_cleanup_fn)
478 mono_thread_cleanup_fn (thread_get_tid (thread));
480 if (mono_gc_is_moving ()) {
481 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
482 thread->thread_pinning_ref = NULL;
488 * A special static data offset (guint32) consists of 3 parts:
490 * [0] 6-bit index into the array of chunks.
491 * [6] 25-bit offset into the array.
492 * [31] Bit indicating thread or context static.
497 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
508 } SpecialStaticOffset;
510 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
511 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
513 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
514 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
515 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
516 (((SpecialStaticOffset *) &(x))->fields.f)
519 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
521 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
523 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
524 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
526 return ((char *) thread->static_data [idx]) + off;
530 get_context_static_data (MonoAppContext *ctx, guint32 offset)
532 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
534 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
535 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
537 return ((char *) ctx->static_data [idx]) + off;
541 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
543 static MonoClassField *current_thread_field = NULL;
547 if (!current_thread_field) {
548 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
549 g_assert (current_thread_field);
552 mono_class_vtable (domain, mono_defaults.thread_class);
553 mono_domain_lock (domain);
554 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
555 mono_domain_unlock (domain);
558 return (MonoThread **)get_thread_static_data (thread, offset);
562 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
564 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
566 g_assert (current->obj.vtable->domain == domain);
568 g_assert (!*current_thread_ptr);
569 *current_thread_ptr = current;
573 create_thread_object (MonoDomain *domain, MonoError *error)
575 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
576 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
581 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
585 thread = create_thread_object (domain, error);
586 if (!mono_error_ok (error))
589 MONO_OBJECT_SETREF (thread, internal_thread, internal);
594 static MonoInternalThread*
595 create_internal_thread (MonoError *error)
597 MonoInternalThread *thread;
600 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
601 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
602 if (!mono_error_ok (error))
605 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
606 mono_coop_mutex_init_recursive (thread->synch_cs);
608 thread->apartment_state = ThreadApartmentState_Unknown;
609 thread->managed_id = get_next_managed_thread_id ();
610 if (mono_gc_is_moving ()) {
611 thread->thread_pinning_ref = thread;
612 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
619 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
622 MonoDomain *domain = mono_get_root_domain ();
624 if (!candidate || candidate->obj.vtable->domain != domain) {
625 candidate = new_thread_with_internal (domain, thread, &error);
626 mono_error_raise_exception (&error); /* FIXME don't raise here */
628 set_current_thread_for_domain (domain, thread, candidate);
629 g_assert (!thread->root_domain_thread);
630 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
633 static guint32 WINAPI start_wrapper_internal(void *data)
635 MonoThreadInfo *info;
636 StartInfo *start_info = (StartInfo *)data;
637 guint32 (*start_func)(void *);
641 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
644 MonoInternalThread *internal = start_info->obj->internal_thread;
645 MonoObject *start_delegate = start_info->delegate;
646 MonoDomain *domain = start_info->obj->obj.vtable->domain;
648 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
650 /* We can be sure start_info->obj->tid and
651 * start_info->obj->handle have been set, because the thread
652 * was created suspended, and these values were set before the
656 info = mono_thread_info_current ();
658 internal->thread_info = info;
659 internal->small_id = info->small_id;
663 SET_CURRENT_OBJECT (internal);
665 /* Every thread references the appdomain which created it */
666 mono_thread_push_appdomain_ref (domain);
668 if (!mono_domain_set (domain, FALSE)) {
669 /* No point in raising an appdomain_unloaded exception here */
670 /* FIXME: Cleanup here */
671 mono_thread_pop_appdomain_ref ();
675 start_func = start_info->func;
676 start_arg = start_info->obj->start_obj;
678 start_arg = start_info->start_arg;
680 /* We have to do this here because mono_thread_new_init()
681 requires that root_domain_thread is set up. */
682 thread_adjust_static_data (internal);
683 init_root_domain_thread (internal, start_info->obj);
685 /* This MUST be called before any managed code can be
686 * executed, as it calls the callback function that (for the
687 * jit) sets the lmf marker.
689 mono_thread_new_init (tid, &tid, start_func);
690 internal->stack_ptr = &tid;
691 if (domain != mono_get_root_domain ())
692 set_current_thread_for_domain (domain, internal, start_info->obj);
694 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
696 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
698 /* On 2.0 profile (and higher), set explicitly since state might have been
700 if (internal->apartment_state == ThreadApartmentState_Unknown)
701 internal->apartment_state = ThreadApartmentState_MTA;
703 mono_thread_init_apartment_state ();
705 if(internal->start_notify!=NULL) {
706 /* Let the thread that called Start() know we're
709 ReleaseSemaphore (internal->start_notify, 1, NULL);
713 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
717 * Call this after calling start_notify, since the profiler callback might want
718 * to lock the thread, and the lock is held by thread_start () which waits for
721 mono_profiler_thread_start (tid);
723 /* if the name was set before starting, we didn't invoke the profiler callback */
724 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
725 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
726 mono_profiler_thread_name (internal->tid, tname);
729 /* start_func is set only for unmanaged start functions */
731 start_func (start_arg);
734 g_assert (start_delegate != NULL);
735 args [0] = start_arg;
736 /* we may want to handle the exception here. See comment below on unhandled exceptions */
737 mono_runtime_delegate_invoke (start_delegate, args, NULL);
740 /* If the thread calls ExitThread at all, this remaining code
741 * will not be executed, but the main thread will eventually
742 * call thread_cleanup() on this thread's behalf.
745 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
747 /* Do any cleanup needed for apartment state. This
748 * cannot be done in thread_cleanup since thread_cleanup could be
749 * called for a thread other than the current thread.
750 * mono_thread_cleanup_apartment_state cleans up apartment
751 * for the current thead */
752 mono_thread_cleanup_apartment_state ();
754 thread_cleanup (internal);
758 /* Remove the reference to the thread object in the TLS data,
759 * so the thread object can be finalized. This won't be
760 * reached if the thread threw an uncaught exception, so those
761 * thread handles will stay referenced :-( (This is due to
762 * missing support for scanning thread-specific data in the
763 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
766 SET_CURRENT_OBJECT (NULL);
771 static guint32 WINAPI start_wrapper(void *data)
775 /* Avoid scanning the frames above this frame during a GC */
776 mono_gc_set_stack_end ((void*)&dummy);
778 return start_wrapper_internal (data);
784 * Common thread creation code.
785 * LOCKING: Acquires the threads lock.
788 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
789 gboolean throw_on_failure)
791 HANDLE thread_handle;
792 MonoNativeThreadId tid;
793 guint32 create_flags;
796 * Join joinable threads to prevent running out of threads since the finalizer
797 * thread might be blocked/backlogged.
799 mono_threads_join_threads ();
801 mono_threads_lock ();
804 mono_threads_unlock ();
807 if (threads_starting_up == NULL) {
808 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
809 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
811 mono_g_hash_table_insert (threads_starting_up, thread, thread);
812 mono_threads_unlock ();
814 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
815 if (!internal->start_notify) {
816 mono_threads_lock ();
817 mono_g_hash_table_remove (threads_starting_up, thread);
818 mono_threads_unlock ();
819 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
825 stack_size = default_stacksize_for_thread (internal);
827 /* Create suspended, so we can do some housekeeping before the thread
830 create_flags = CREATE_SUSPENDED;
832 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
833 stack_size, create_flags, &tid);
835 if (thread_handle == NULL) {
836 /* The thread couldn't be created, so throw an exception */
837 mono_threads_lock ();
838 mono_g_hash_table_remove (threads_starting_up, thread);
839 mono_threads_unlock ();
841 if (throw_on_failure)
842 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
844 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
847 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
849 internal->handle = thread_handle;
850 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
852 internal->threadpool_thread = threadpool_thread;
853 if (threadpool_thread)
854 mono_thread_set_state (internal, ThreadState_Background);
856 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
858 /* Only store the handle when the thread is about to be
859 * launched, to avoid the main thread deadlocking while trying
860 * to clean up a thread that will never be signalled.
862 if (!handle_store (thread, FALSE))
865 mono_thread_info_resume (tid);
867 if (internal->start_notify) {
869 * Wait for the thread to set up its TLS data etc, so
870 * theres no potential race condition if someone tries
871 * to look up the data believing the thread has
874 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));
876 MONO_PREPARE_BLOCKING;
877 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
878 MONO_FINISH_BLOCKING;
880 CloseHandle (internal->start_notify);
881 internal->start_notify = NULL;
884 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));
889 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
891 if (mono_thread_start_cb) {
892 mono_thread_start_cb (tid, stack_start, func);
896 void mono_threads_set_default_stacksize (guint32 stacksize)
898 default_stacksize = stacksize;
901 guint32 mono_threads_get_default_stacksize (void)
903 return default_stacksize;
907 * mono_thread_create_internal:
909 * ARG should not be a GC reference.
912 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
916 MonoInternalThread *internal;
917 StartInfo *start_info;
920 thread = create_thread_object (domain, &error);
921 mono_error_raise_exception (&error); /* FIXME don't raise here */
923 internal = create_internal_thread (&error);
924 mono_error_raise_exception (&error); /* FIXME don't raise here */
926 MONO_OBJECT_SETREF (thread, internal_thread, internal);
928 start_info = g_new0 (StartInfo, 1);
929 start_info->func = (guint32 (*)(void *))func;
930 start_info->obj = thread;
931 start_info->start_arg = arg;
933 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
937 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
938 #ifndef MONO_CROSS_COMPILE
939 if (mono_check_corlib_version () == NULL)
940 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
947 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
949 mono_thread_create_internal (domain, func, arg, FALSE, 0);
953 mono_thread_attach (MonoDomain *domain)
956 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
957 mono_error_raise_exception (&error);
963 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
965 MonoThreadInfo *info;
966 MonoInternalThread *thread;
967 MonoThread *current_thread;
968 HANDLE thread_handle;
969 MonoNativeThreadId tid;
971 mono_error_init (error);
973 if ((thread = mono_thread_internal_current ())) {
974 if (domain != mono_domain_get ())
975 mono_domain_set (domain, TRUE);
976 /* Already attached */
977 return mono_thread_current ();
980 if (!mono_gc_register_thread (&domain)) {
981 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 ());
984 thread = create_internal_thread (error);
985 if (!mono_error_ok (error))
988 thread_handle = mono_thread_info_open_handle ();
989 g_assert (thread_handle);
991 tid=mono_native_thread_id_get ();
993 thread->handle = thread_handle;
994 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
995 thread->stack_ptr = &tid;
997 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
999 info = mono_thread_info_current ();
1001 thread->thread_info = info;
1002 thread->small_id = info->small_id;
1004 current_thread = new_thread_with_internal (domain, thread, error);
1005 if (!mono_error_ok (error))
1008 if (!handle_store (current_thread, force_attach)) {
1009 /* Mono is shutting down, so just wait for the end */
1011 mono_thread_info_sleep (10000, NULL);
1014 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1016 SET_CURRENT_OBJECT (thread);
1017 mono_domain_set (domain, TRUE);
1019 thread_adjust_static_data (thread);
1021 init_root_domain_thread (thread, current_thread);
1022 if (domain != mono_get_root_domain ())
1023 set_current_thread_for_domain (domain, thread, current_thread);
1026 if (mono_thread_attach_cb) {
1030 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1033 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1035 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1038 // FIXME: Need a separate callback
1039 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1041 return current_thread;
1045 mono_thread_detach_internal (MonoInternalThread *thread)
1047 g_return_if_fail (thread != NULL);
1049 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1051 thread_cleanup (thread);
1053 SET_CURRENT_OBJECT (NULL);
1054 mono_domain_unset ();
1056 /* Don't need to CloseHandle this thread, even though we took a
1057 * reference in mono_thread_attach (), because the GC will do it
1058 * when the Thread object is finalised.
1063 mono_thread_detach (MonoThread *thread)
1066 mono_thread_detach_internal (thread->internal_thread);
1070 * mono_thread_detach_if_exiting:
1072 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1073 * This should be used at the end of embedding code which calls into managed code, and which
1074 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1077 mono_thread_detach_if_exiting (void)
1079 if (mono_thread_info_is_exiting ()) {
1080 MonoInternalThread *thread;
1082 thread = mono_thread_internal_current ();
1084 mono_thread_detach_internal (thread);
1085 mono_thread_info_detach ();
1093 MonoInternalThread *thread = mono_thread_internal_current ();
1095 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1097 thread_cleanup (thread);
1098 SET_CURRENT_OBJECT (NULL);
1099 mono_domain_unset ();
1101 /* we could add a callback here for embedders to use. */
1102 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1103 exit (mono_environment_exitcode_get ());
1104 mono_thread_info_exit ();
1108 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1111 MonoInternalThread *internal;
1113 internal = create_internal_thread (&error);
1114 mono_error_raise_exception (&error);
1116 internal->state = ThreadState_Unstarted;
1118 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1122 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1125 StartInfo *start_info;
1126 MonoInternalThread *internal;
1129 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1131 if (!this_obj->internal_thread)
1132 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1133 internal = this_obj->internal_thread;
1135 LOCK_THREAD (internal);
1137 if ((internal->state & ThreadState_Unstarted) == 0) {
1138 UNLOCK_THREAD (internal);
1139 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1143 if ((internal->state & ThreadState_Aborted) != 0) {
1144 UNLOCK_THREAD (internal);
1147 /* This is freed in start_wrapper */
1148 start_info = g_new0 (StartInfo, 1);
1149 start_info->func = NULL;
1150 start_info->start_arg = NULL;
1151 start_info->delegate = start;
1152 start_info->obj = this_obj;
1153 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1155 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1157 UNLOCK_THREAD (internal);
1161 internal->state &= ~ThreadState_Unstarted;
1163 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1165 UNLOCK_THREAD (internal);
1166 return internal->handle;
1170 * This is called from the finalizer of the internal thread object.
1173 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1175 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1178 * Since threads keep a reference to their thread object while running, by the time this function is called,
1179 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1180 * when thread_cleanup () can be called after this.
1183 CloseHandle (thread);
1185 if (this_obj->synch_cs) {
1186 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1187 this_obj->synch_cs = NULL;
1188 mono_coop_mutex_destroy (synch_cs);
1192 if (this_obj->name) {
1193 void *name = this_obj->name;
1194 this_obj->name = NULL;
1200 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1203 MonoInternalThread *thread = mono_thread_internal_current ();
1205 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1207 mono_thread_current_check_pending_interrupt ();
1210 gboolean alerted = FALSE;
1212 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1214 res = mono_thread_info_sleep (ms, &alerted);
1216 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1219 MonoException* exc = mono_thread_execute_interruption ();
1221 mono_raise_exception (exc);
1233 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1238 ves_icall_System_Threading_Thread_GetDomainID (void)
1240 return mono_domain_get()->domain_id;
1244 ves_icall_System_Threading_Thread_Yield (void)
1246 return mono_thread_info_yield ();
1250 * mono_thread_get_name:
1252 * Return the name of the thread. NAME_LEN is set to the length of the name.
1253 * Return NULL if the thread has no name. The returned memory is owned by the
1257 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1261 LOCK_THREAD (this_obj);
1263 if (!this_obj->name) {
1267 *name_len = this_obj->name_len;
1268 res = g_new (gunichar2, this_obj->name_len);
1269 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1272 UNLOCK_THREAD (this_obj);
1278 * mono_thread_get_name_utf8:
1280 * Return the name of the thread in UTF-8.
1281 * Return NULL if the thread has no name.
1282 * The returned memory is owned by the caller.
1285 mono_thread_get_name_utf8 (MonoThread *thread)
1290 MonoInternalThread *internal = thread->internal_thread;
1291 if (internal == NULL)
1294 LOCK_THREAD (internal);
1296 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1298 UNLOCK_THREAD (internal);
1304 * mono_thread_get_managed_id:
1306 * Return the Thread.ManagedThreadId value of `thread`.
1307 * Returns -1 if `thread` is NULL.
1310 mono_thread_get_managed_id (MonoThread *thread)
1315 MonoInternalThread *internal = thread->internal_thread;
1316 if (internal == NULL)
1319 int32_t id = internal->managed_id;
1325 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1330 mono_error_init (&error);
1332 LOCK_THREAD (this_obj);
1334 if (!this_obj->name)
1337 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1339 UNLOCK_THREAD (this_obj);
1341 mono_error_raise_exception (&error);
1347 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1349 LOCK_THREAD (this_obj);
1351 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1352 UNLOCK_THREAD (this_obj);
1354 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1357 if (this_obj->name) {
1358 g_free (this_obj->name);
1359 this_obj->name_len = 0;
1362 this_obj->name = g_new (gunichar2, mono_string_length (name));
1363 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1364 this_obj->name_len = mono_string_length (name);
1367 this_obj->name = NULL;
1370 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1372 UNLOCK_THREAD (this_obj);
1374 if (this_obj->name && this_obj->tid) {
1375 char *tname = mono_string_to_utf8 (name);
1376 mono_profiler_thread_name (this_obj->tid, tname);
1377 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1383 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1385 mono_thread_set_name_internal (this_obj, name, TRUE);
1389 * ves_icall_System_Threading_Thread_GetPriority_internal:
1390 * @param this_obj: The MonoInternalThread on which to operate.
1392 * Gets the priority of the given thread.
1393 * @return: The priority of the given thread.
1396 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1399 MonoInternalThread *internal = this_obj->internal_thread;
1401 LOCK_THREAD (internal);
1402 priority = GetThreadPriority (internal->handle) + 2;
1403 UNLOCK_THREAD (internal);
1408 * ves_icall_System_Threading_Thread_SetPriority_internal:
1409 * @param this_obj: The MonoInternalThread on which to operate.
1410 * @param priority: The priority to set.
1412 * Sets the priority of the given thread.
1415 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1417 MonoInternalThread *internal = this_obj->internal_thread;
1419 LOCK_THREAD (internal);
1420 SetThreadPriority (internal->handle, priority - 2);
1421 UNLOCK_THREAD (internal);
1424 /* If the array is already in the requested domain, we just return it,
1425 otherwise we return a copy in that domain. */
1427 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1434 if (mono_object_domain (arr) == domain)
1437 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1438 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1443 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1445 return byte_array_to_domain (arr, mono_get_root_domain ());
1449 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1451 return byte_array_to_domain (arr, mono_domain_get ());
1455 mono_thread_current (void)
1458 MonoDomain *domain = mono_domain_get ();
1459 MonoInternalThread *internal = mono_thread_internal_current ();
1460 MonoThread **current_thread_ptr;
1462 g_assert (internal);
1463 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1465 if (!*current_thread_ptr) {
1466 g_assert (domain != mono_get_root_domain ());
1467 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1468 mono_error_raise_exception (&error); /* FIXME don't raise here */
1470 return *current_thread_ptr;
1473 /* Return the thread object belonging to INTERNAL in the current domain */
1475 mono_thread_current_for_thread (MonoInternalThread *internal)
1478 MonoDomain *domain = mono_domain_get ();
1479 MonoThread **current_thread_ptr;
1481 g_assert (internal);
1482 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1484 if (!*current_thread_ptr) {
1485 g_assert (domain != mono_get_root_domain ());
1486 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1487 mono_error_raise_exception (&error); /* FIXME don't raise here */
1489 return *current_thread_ptr;
1493 mono_thread_internal_current (void)
1495 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1496 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1501 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1503 MonoInternalThread *thread = this_obj->internal_thread;
1504 HANDLE handle = thread->handle;
1505 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1508 mono_thread_current_check_pending_interrupt ();
1510 LOCK_THREAD (thread);
1512 if ((thread->state & ThreadState_Unstarted) != 0) {
1513 UNLOCK_THREAD (thread);
1515 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1519 UNLOCK_THREAD (thread);
1524 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1526 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1528 MONO_PREPARE_BLOCKING;
1529 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1530 MONO_FINISH_BLOCKING;
1532 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1534 if(ret==WAIT_OBJECT_0) {
1535 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1540 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1546 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1554 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1556 MONO_PREPARE_BLOCKING;
1558 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1560 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1561 MONO_FINISH_BLOCKING;
1563 if (ret != WAIT_IO_COMPLETION)
1566 exc = mono_thread_execute_interruption ();
1568 mono_raise_exception (exc);
1573 /* Re-calculate ms according to the time passed */
1574 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1575 if (diff_ms >= ms) {
1579 wait = ms - diff_ms;
1585 /* FIXME: exitContext isnt documented */
1586 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1592 MonoObject *waitHandle;
1593 MonoInternalThread *thread = mono_thread_internal_current ();
1595 /* Do this WaitSleepJoin check before creating objects */
1596 mono_thread_current_check_pending_interrupt ();
1598 /* We fail in managed if the array has more than 64 elements */
1599 numhandles = (guint32)mono_array_length(mono_handles);
1600 handles = g_new0(HANDLE, numhandles);
1602 for(i = 0; i < numhandles; i++) {
1603 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1604 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1611 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1613 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1615 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1619 if(ret==WAIT_FAILED) {
1620 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1622 } else if(ret==WAIT_TIMEOUT) {
1623 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1630 /* FIXME: exitContext isnt documented */
1631 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1633 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1634 uintptr_t numhandles;
1637 MonoObject *waitHandle;
1638 MonoInternalThread *thread = mono_thread_internal_current ();
1640 /* Do this WaitSleepJoin check before creating objects */
1641 mono_thread_current_check_pending_interrupt ();
1643 numhandles = mono_array_length(mono_handles);
1644 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1647 for(i = 0; i < numhandles; i++) {
1648 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1649 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1656 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1658 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1660 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1662 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1665 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1667 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1668 return ret - WAIT_OBJECT_0;
1670 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1671 return ret - WAIT_ABANDONED_0;
1678 /* FIXME: exitContext isnt documented */
1679 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1682 MonoInternalThread *thread = mono_thread_internal_current ();
1684 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1690 mono_thread_current_check_pending_interrupt ();
1692 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1694 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1696 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1698 if(ret==WAIT_FAILED) {
1699 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1701 } else if(ret==WAIT_TIMEOUT) {
1702 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1710 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1713 MonoInternalThread *thread = mono_thread_internal_current ();
1718 mono_thread_current_check_pending_interrupt ();
1720 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1722 MONO_PREPARE_BLOCKING;
1723 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1724 MONO_FINISH_BLOCKING;
1726 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1728 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1731 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1738 mutex = CreateMutex (NULL, owned, NULL);
1740 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1742 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1750 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1751 return(ReleaseMutex (handle));
1754 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1760 *error = ERROR_SUCCESS;
1762 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1764 *error = GetLastError ();
1771 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1778 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1780 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1781 mono_string_chars (name));
1783 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1791 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1795 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1800 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1804 *error = ERROR_SUCCESS;
1806 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1808 *error = GetLastError ();
1814 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1821 event = CreateEvent (NULL, manual, initial, NULL);
1823 event = CreateEvent (NULL, manual, initial,
1824 mono_string_chars (name));
1826 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1834 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1835 return (SetEvent(handle));
1838 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1839 return (ResetEvent(handle));
1843 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1844 CloseHandle (handle);
1847 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1853 *error = ERROR_SUCCESS;
1855 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1857 *error = GetLastError ();
1863 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1865 return InterlockedIncrement (location);
1868 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1870 #if SIZEOF_VOID_P == 4
1871 if (G_UNLIKELY ((size_t)location & 0x7)) {
1873 mono_interlocked_lock ();
1876 mono_interlocked_unlock ();
1880 return InterlockedIncrement64 (location);
1883 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1885 return InterlockedDecrement(location);
1888 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1890 #if SIZEOF_VOID_P == 4
1891 if (G_UNLIKELY ((size_t)location & 0x7)) {
1893 mono_interlocked_lock ();
1896 mono_interlocked_unlock ();
1900 return InterlockedDecrement64 (location);
1903 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1905 return InterlockedExchange(location, value);
1908 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1911 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1912 mono_gc_wbarrier_generic_nostore (location);
1916 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1918 return InterlockedExchangePointer(location, value);
1921 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1923 IntFloatUnion val, ret;
1926 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1932 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1934 #if SIZEOF_VOID_P == 4
1935 if (G_UNLIKELY ((size_t)location & 0x7)) {
1937 mono_interlocked_lock ();
1940 mono_interlocked_unlock ();
1944 return InterlockedExchange64 (location, value);
1948 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1950 LongDoubleUnion val, ret;
1953 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1958 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1960 return InterlockedCompareExchange(location, value, comparand);
1963 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1965 gint32 r = InterlockedCompareExchange(location, value, comparand);
1966 *success = r == comparand;
1970 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1973 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1974 mono_gc_wbarrier_generic_nostore (location);
1978 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1980 return InterlockedCompareExchangePointer(location, value, comparand);
1983 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1985 IntFloatUnion val, ret, cmp;
1988 cmp.fval = comparand;
1989 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1995 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1997 #if SIZEOF_VOID_P == 8
1998 LongDoubleUnion val, comp, ret;
2001 comp.fval = comparand;
2002 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2008 mono_interlocked_lock ();
2010 if (old == comparand)
2012 mono_interlocked_unlock ();
2019 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2021 #if SIZEOF_VOID_P == 4
2022 if (G_UNLIKELY ((size_t)location & 0x7)) {
2024 mono_interlocked_lock ();
2026 if (old == comparand)
2028 mono_interlocked_unlock ();
2032 return InterlockedCompareExchange64 (location, value, comparand);
2036 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2039 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2040 mono_gc_wbarrier_generic_nostore (location);
2045 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2048 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2049 mono_gc_wbarrier_generic_nostore (location);
2054 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2056 return InterlockedAdd (location, value);
2060 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2062 #if SIZEOF_VOID_P == 4
2063 if (G_UNLIKELY ((size_t)location & 0x7)) {
2065 mono_interlocked_lock ();
2068 mono_interlocked_unlock ();
2072 return InterlockedAdd64 (location, value);
2076 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2078 #if SIZEOF_VOID_P == 4
2079 if (G_UNLIKELY ((size_t)location & 0x7)) {
2081 mono_interlocked_lock ();
2083 mono_interlocked_unlock ();
2087 return InterlockedRead64 (location);
2091 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2093 mono_memory_barrier ();
2097 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2099 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2101 if (state & ThreadState_Background) {
2102 /* If the thread changes the background mode, the main thread has to
2103 * be notified, since it has to rebuild the list of threads to
2106 SetEvent (background_change_event);
2111 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2113 mono_thread_set_state (this_obj, (MonoThreadState)state);
2115 if (state & ThreadState_Background) {
2116 /* If the thread changes the background mode, the main thread has to
2117 * be notified, since it has to rebuild the list of threads to
2120 SetEvent (background_change_event);
2125 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2129 LOCK_THREAD (this_obj);
2131 state = this_obj->state;
2133 UNLOCK_THREAD (this_obj);
2138 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2140 MonoInternalThread *current;
2142 MonoInternalThread *thread = this_obj->internal_thread;
2144 LOCK_THREAD (thread);
2146 current = mono_thread_internal_current ();
2148 thread->thread_interrupt_requested = TRUE;
2149 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2151 UNLOCK_THREAD (thread);
2154 async_abort_internal (thread, FALSE);
2158 void mono_thread_current_check_pending_interrupt ()
2160 MonoInternalThread *thread = mono_thread_internal_current ();
2161 gboolean throw_ = FALSE;
2163 LOCK_THREAD (thread);
2165 if (thread->thread_interrupt_requested) {
2167 thread->thread_interrupt_requested = FALSE;
2170 UNLOCK_THREAD (thread);
2173 mono_raise_exception (mono_get_exception_thread_interrupted ());
2178 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2180 LOCK_THREAD (thread);
2182 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2183 (thread->state & ThreadState_StopRequested) != 0 ||
2184 (thread->state & ThreadState_Stopped) != 0)
2186 UNLOCK_THREAD (thread);
2190 if ((thread->state & ThreadState_Unstarted) != 0) {
2191 thread->state |= ThreadState_Aborted;
2192 UNLOCK_THREAD (thread);
2196 thread->state |= ThreadState_AbortRequested;
2197 if (thread->abort_state_handle)
2198 mono_gchandle_free (thread->abort_state_handle);
2200 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2201 g_assert (thread->abort_state_handle);
2203 thread->abort_state_handle = 0;
2205 thread->abort_exc = NULL;
2207 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));
2209 /* During shutdown, we can't wait for other threads */
2211 /* Make sure the thread is awake */
2212 mono_thread_resume (thread);
2214 UNLOCK_THREAD (thread);
2216 if (thread == mono_thread_internal_current ())
2217 self_abort_internal ();
2219 async_abort_internal (thread, TRUE);
2223 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2225 MonoInternalThread *thread = mono_thread_internal_current ();
2226 gboolean was_aborting;
2228 LOCK_THREAD (thread);
2229 was_aborting = thread->state & ThreadState_AbortRequested;
2230 thread->state &= ~ThreadState_AbortRequested;
2231 UNLOCK_THREAD (thread);
2233 if (!was_aborting) {
2234 const char *msg = "Unable to reset abort because no abort was requested";
2235 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2238 thread->abort_exc = NULL;
2239 if (thread->abort_state_handle) {
2240 mono_gchandle_free (thread->abort_state_handle);
2241 /* This is actually not necessary - the handle
2242 only counts if the exception is set */
2243 thread->abort_state_handle = 0;
2248 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2250 LOCK_THREAD (thread);
2252 thread->state &= ~ThreadState_AbortRequested;
2254 if (thread->abort_exc) {
2255 thread->abort_exc = NULL;
2256 if (thread->abort_state_handle) {
2257 mono_gchandle_free (thread->abort_state_handle);
2258 /* This is actually not necessary - the handle
2259 only counts if the exception is set */
2260 thread->abort_state_handle = 0;
2264 UNLOCK_THREAD (thread);
2268 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2270 MonoInternalThread *thread = this_obj->internal_thread;
2271 MonoObject *state, *deserialized = NULL, *exc;
2274 if (!thread->abort_state_handle)
2277 state = mono_gchandle_get_target (thread->abort_state_handle);
2280 domain = mono_domain_get ();
2281 if (mono_object_domain (state) == domain)
2284 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2286 if (!deserialized) {
2287 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2289 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2290 mono_set_pending_exception (invalid_op_exc);
2294 return deserialized;
2298 mono_thread_suspend (MonoInternalThread *thread)
2300 LOCK_THREAD (thread);
2302 if ((thread->state & ThreadState_Unstarted) != 0 ||
2303 (thread->state & ThreadState_Aborted) != 0 ||
2304 (thread->state & ThreadState_Stopped) != 0)
2306 UNLOCK_THREAD (thread);
2310 if ((thread->state & ThreadState_Suspended) != 0 ||
2311 (thread->state & ThreadState_SuspendRequested) != 0 ||
2312 (thread->state & ThreadState_StopRequested) != 0)
2314 UNLOCK_THREAD (thread);
2318 thread->state |= ThreadState_SuspendRequested;
2320 if (thread == mono_thread_internal_current ()) {
2321 /* calls UNLOCK_THREAD (thread) */
2322 self_suspend_internal ();
2324 /* calls UNLOCK_THREAD (thread) */
2325 async_suspend_internal (thread, FALSE);
2332 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2334 if (!mono_thread_suspend (this_obj->internal_thread)) {
2335 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2340 /* LOCKING: LOCK_THREAD(thread) must be held */
2342 mono_thread_resume (MonoInternalThread *thread)
2344 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2345 thread->state &= ~ThreadState_SuspendRequested;
2349 if ((thread->state & ThreadState_Suspended) == 0 ||
2350 (thread->state & ThreadState_Unstarted) != 0 ||
2351 (thread->state & ThreadState_Aborted) != 0 ||
2352 (thread->state & ThreadState_Stopped) != 0)
2357 UNLOCK_THREAD (thread);
2359 /* Awake the thread */
2360 if (!mono_thread_info_resume (thread_get_tid (thread)))
2363 LOCK_THREAD (thread);
2365 thread->state &= ~ThreadState_Suspended;
2371 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2373 if (!thread->internal_thread) {
2374 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2376 LOCK_THREAD (thread->internal_thread);
2377 if (!mono_thread_resume (thread->internal_thread))
2378 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2379 UNLOCK_THREAD (thread->internal_thread);
2384 mono_threads_is_critical_method (MonoMethod *method)
2386 switch (method->wrapper_type) {
2387 case MONO_WRAPPER_RUNTIME_INVOKE:
2388 case MONO_WRAPPER_XDOMAIN_INVOKE:
2389 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2396 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2401 if (mono_threads_is_critical_method (m)) {
2402 *((gboolean*)data) = TRUE;
2409 is_running_protected_wrapper (void)
2411 gboolean found = FALSE;
2412 mono_stack_walk (find_wrapper, &found);
2416 void mono_thread_internal_stop (MonoInternalThread *thread)
2418 LOCK_THREAD (thread);
2420 if ((thread->state & ThreadState_StopRequested) != 0 ||
2421 (thread->state & ThreadState_Stopped) != 0)
2423 UNLOCK_THREAD (thread);
2427 /* Make sure the thread is awake */
2428 mono_thread_resume (thread);
2430 thread->state |= ThreadState_StopRequested;
2431 thread->state &= ~ThreadState_AbortRequested;
2433 UNLOCK_THREAD (thread);
2435 if (thread == mono_thread_internal_current ())
2436 self_abort_internal ();
2438 async_abort_internal (thread, TRUE);
2441 void mono_thread_stop (MonoThread *thread)
2443 mono_thread_internal_stop (thread->internal_thread);
2447 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2449 gint8 tmp = *(volatile gint8 *)ptr;
2450 mono_memory_barrier ();
2455 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2457 gint16 tmp = *(volatile gint16 *)ptr;
2458 mono_memory_barrier ();
2463 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2465 gint32 tmp = *(volatile gint32 *)ptr;
2466 mono_memory_barrier ();
2471 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2473 gint64 tmp = *(volatile gint64 *)ptr;
2474 mono_memory_barrier ();
2479 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2481 volatile void *tmp = *(volatile void **)ptr;
2482 mono_memory_barrier ();
2483 return (void *) tmp;
2487 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2489 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2490 mono_memory_barrier ();
2491 return (MonoObject *) tmp;
2495 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2497 double tmp = *(volatile double *)ptr;
2498 mono_memory_barrier ();
2503 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2505 float tmp = *(volatile float *)ptr;
2506 mono_memory_barrier ();
2511 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2513 return InterlockedRead8 ((volatile gint8 *)ptr);
2517 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2519 return InterlockedRead16 ((volatile gint16 *)ptr);
2523 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2525 return InterlockedRead ((volatile gint32 *)ptr);
2529 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2531 #if SIZEOF_VOID_P == 4
2532 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2534 mono_interlocked_lock ();
2535 val = *(gint64*)ptr;
2536 mono_interlocked_unlock ();
2540 return InterlockedRead64 ((volatile gint64 *)ptr);
2544 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2546 return InterlockedReadPointer ((volatile gpointer *)ptr);
2550 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2554 #if SIZEOF_VOID_P == 4
2555 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2557 mono_interlocked_lock ();
2558 val = *(double*)ptr;
2559 mono_interlocked_unlock ();
2564 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2570 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2574 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2580 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2582 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2586 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2588 mono_memory_barrier ();
2589 *(volatile gint8 *)ptr = value;
2593 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2595 mono_memory_barrier ();
2596 *(volatile gint16 *)ptr = value;
2600 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2602 mono_memory_barrier ();
2603 *(volatile gint32 *)ptr = value;
2607 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2609 mono_memory_barrier ();
2610 *(volatile gint64 *)ptr = value;
2614 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2616 mono_memory_barrier ();
2617 *(volatile void **)ptr = value;
2621 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2623 mono_memory_barrier ();
2624 mono_gc_wbarrier_generic_store (ptr, value);
2628 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2630 mono_memory_barrier ();
2631 *(volatile double *)ptr = value;
2635 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2637 mono_memory_barrier ();
2638 *(volatile float *)ptr = value;
2642 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2644 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2648 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2650 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2654 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2656 InterlockedWrite ((volatile gint32 *)ptr, value);
2660 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2662 #if SIZEOF_VOID_P == 4
2663 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2664 mono_interlocked_lock ();
2665 *(gint64*)ptr = value;
2666 mono_interlocked_unlock ();
2671 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2675 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2677 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2681 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2685 #if SIZEOF_VOID_P == 4
2686 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2687 mono_interlocked_lock ();
2688 *(double*)ptr = value;
2689 mono_interlocked_unlock ();
2696 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2700 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2706 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2710 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2712 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2716 free_context (void *user_data)
2718 ContextStaticData *data = user_data;
2720 mono_threads_lock ();
2723 * There is no guarantee that, by the point this reference queue callback
2724 * has been invoked, the GC handle associated with the object will fail to
2725 * resolve as one might expect. So if we don't free and remove the GC
2726 * handle here, free_context_static_data_helper () could end up resolving
2727 * a GC handle to an actually-dead context which would contain a pointer
2728 * to an already-freed static data segment, resulting in a crash when
2731 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2733 mono_threads_unlock ();
2735 mono_gchandle_free (data->gc_handle);
2736 mono_free_static_data (data->static_data);
2741 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2743 mono_threads_lock ();
2745 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2748 contexts = g_hash_table_new (NULL, NULL);
2751 context_queue = mono_gc_reference_queue_new (free_context);
2753 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2754 g_hash_table_insert (contexts, gch, gch);
2757 * We use this intermediate structure to contain a duplicate pointer to
2758 * the static data because we can't rely on being able to resolve the GC
2759 * handle in the reference queue callback.
2761 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2762 data->gc_handle = GPOINTER_TO_UINT (gch);
2765 context_adjust_static_data (ctx);
2766 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2768 mono_threads_unlock ();
2770 mono_profiler_context_loaded (ctx);
2774 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2777 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2778 * cleanup in exceptional circumstances, we don't actually do any
2779 * cleanup work here. We instead do this via a reference queue.
2782 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2784 mono_profiler_context_unloaded (ctx);
2788 mono_thread_init_tls (void)
2790 MONO_FAST_TLS_INIT (tls_current_object);
2791 mono_native_tls_alloc (¤t_object_key, NULL);
2794 void mono_thread_init (MonoThreadStartCB start_cb,
2795 MonoThreadAttachCB attach_cb)
2797 mono_coop_mutex_init_recursive (&threads_mutex);
2799 mono_os_mutex_init_recursive(&interlocked_mutex);
2800 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2802 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2803 g_assert(background_change_event != NULL);
2805 mono_init_static_data_info (&thread_static_info);
2806 mono_init_static_data_info (&context_static_info);
2808 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2810 mono_thread_start_cb = start_cb;
2811 mono_thread_attach_cb = attach_cb;
2813 /* Get a pseudo handle to the current process. This is just a
2814 * kludge so that wapi can build a process handle if needed.
2815 * As a pseudo handle is returned, we don't need to clean
2818 GetCurrentProcess ();
2821 void mono_thread_cleanup (void)
2823 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2824 MonoThreadInfo *info;
2826 /* The main thread must abandon any held mutexes (particularly
2827 * important for named mutexes as they are shared across
2828 * processes, see bug 74680.) This will happen when the
2829 * thread exits, but if it's not running in a subthread it
2830 * won't exit in time.
2832 info = mono_thread_info_current ();
2833 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2837 /* This stuff needs more testing, it seems one of these
2838 * critical sections can be locked when mono_thread_cleanup is
2841 mono_coop_mutex_destroy (&threads_mutex);
2842 mono_os_mutex_destroy (&interlocked_mutex);
2843 mono_os_mutex_destroy (&delayed_free_table_mutex);
2844 mono_os_mutex_destroy (&small_id_mutex);
2845 CloseHandle (background_change_event);
2848 mono_native_tls_free (current_object_key);
2852 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2854 mono_thread_cleanup_fn = func;
2858 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2860 thread->internal_thread->manage_callback = func;
2864 static void print_tids (gpointer key, gpointer value, gpointer user)
2866 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2867 * sizeof(uint) and a cast to uint would overflow
2869 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2870 * print this as a pointer.
2872 g_message ("Waiting for: %p", key);
2877 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2878 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2882 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2886 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2888 MONO_PREPARE_BLOCKING;
2889 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2890 MONO_FINISH_BLOCKING;
2892 if(ret==WAIT_FAILED) {
2893 /* See the comment in build_wait_tids() */
2894 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2898 for(i=0; i<wait->num; i++)
2899 CloseHandle (wait->handles[i]);
2901 if (ret == WAIT_TIMEOUT)
2904 for(i=0; i<wait->num; i++) {
2905 gsize tid = wait->threads[i]->tid;
2908 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2909 * it can still run io-layer etc. code. So wait for it to really exit.
2910 * FIXME: This won't join threads which are not in the joinable_hash yet.
2912 mono_thread_join ((gpointer)tid);
2914 mono_threads_lock ();
2915 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2916 /* This thread must have been killed, because
2917 * it hasn't cleaned itself up. (It's just
2918 * possible that the thread exited before the
2919 * parent thread had a chance to store the
2920 * handle, and now there is another pointer to
2921 * the already-exited thread stored. In this
2922 * case, we'll just get two
2923 * mono_profiler_thread_end() calls for the
2927 mono_threads_unlock ();
2928 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2929 thread_cleanup (wait->threads[i]);
2931 mono_threads_unlock ();
2936 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2938 guint32 i, ret, count;
2940 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2942 /* Add the thread state change event, so it wakes up if a thread changes
2943 * to background mode.
2946 if (count < MAXIMUM_WAIT_OBJECTS) {
2947 wait->handles [count] = background_change_event;
2951 MONO_PREPARE_BLOCKING;
2952 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2953 MONO_FINISH_BLOCKING;
2955 if(ret==WAIT_FAILED) {
2956 /* See the comment in build_wait_tids() */
2957 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2961 for(i=0; i<wait->num; i++)
2962 CloseHandle (wait->handles[i]);
2964 if (ret == WAIT_TIMEOUT)
2967 if (ret < wait->num) {
2968 gsize tid = wait->threads[ret]->tid;
2969 mono_threads_lock ();
2970 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2971 /* See comment in wait_for_tids about thread cleanup */
2972 mono_threads_unlock ();
2973 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2974 thread_cleanup (wait->threads [ret]);
2976 mono_threads_unlock ();
2980 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2982 struct wait_data *wait=(struct wait_data *)user;
2984 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2986 MonoInternalThread *thread=(MonoInternalThread *)value;
2988 /* Ignore background threads, we abort them later */
2989 /* Do not lock here since it is not needed and the caller holds threads_lock */
2990 if (thread->state & ThreadState_Background) {
2991 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2992 return; /* just leave, ignore */
2995 if (mono_gc_is_finalizer_internal_thread (thread)) {
2996 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3000 if (thread == mono_thread_internal_current ()) {
3001 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3005 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3006 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3010 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3011 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3015 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3016 if (handle == NULL) {
3017 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3021 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3022 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3023 wait->handles[wait->num]=handle;
3024 wait->threads[wait->num]=thread;
3027 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3029 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3034 /* Just ignore the rest, we can't do anything with
3041 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3043 struct wait_data *wait=(struct wait_data *)user;
3044 MonoNativeThreadId self = mono_native_thread_id_get ();
3045 MonoInternalThread *thread = (MonoInternalThread *)value;
3048 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3051 /* The finalizer thread is not a background thread */
3052 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3053 && (thread->state & ThreadState_Background) != 0
3054 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3056 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3060 /* printf ("A: %d\n", wait->num); */
3061 wait->handles[wait->num]=thread->handle;
3062 wait->threads[wait->num]=thread;
3065 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3066 mono_thread_internal_stop (thread);
3070 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3071 && !mono_gc_is_finalizer_internal_thread (thread);
3075 * mono_threads_set_shutting_down:
3077 * Is called by a thread that wants to shut down Mono. If the runtime is already
3078 * shutting down, the calling thread is suspended/stopped, and this function never
3082 mono_threads_set_shutting_down (void)
3084 MonoInternalThread *current_thread = mono_thread_internal_current ();
3086 mono_threads_lock ();
3088 if (shutting_down) {
3089 mono_threads_unlock ();
3091 /* Make sure we're properly suspended/stopped */
3093 LOCK_THREAD (current_thread);
3095 if ((current_thread->state & ThreadState_SuspendRequested) ||
3096 (current_thread->state & ThreadState_AbortRequested) ||
3097 (current_thread->state & ThreadState_StopRequested)) {
3098 UNLOCK_THREAD (current_thread);
3099 mono_thread_execute_interruption ();
3101 current_thread->state |= ThreadState_Stopped;
3102 UNLOCK_THREAD (current_thread);
3105 /*since we're killing the thread, unset the current domain.*/
3106 mono_domain_unset ();
3108 /* Wake up other threads potentially waiting for us */
3109 mono_thread_info_exit ();
3111 shutting_down = TRUE;
3113 /* Not really a background state change, but this will
3114 * interrupt the main thread if it is waiting for all
3115 * the other threads.
3117 SetEvent (background_change_event);
3119 mono_threads_unlock ();
3123 void mono_thread_manage (void)
3125 struct wait_data wait_data;
3126 struct wait_data *wait = &wait_data;
3128 memset (wait, 0, sizeof (struct wait_data));
3129 /* join each thread that's still running */
3130 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3132 mono_threads_lock ();
3134 THREAD_DEBUG (g_message("%s: No threads", __func__));
3135 mono_threads_unlock ();
3138 mono_threads_unlock ();
3141 mono_threads_lock ();
3142 if (shutting_down) {
3143 /* somebody else is shutting down */
3144 mono_threads_unlock ();
3147 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3148 mono_g_hash_table_foreach (threads, print_tids, NULL));
3150 ResetEvent (background_change_event);
3152 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3153 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3154 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3155 mono_threads_unlock ();
3157 /* Something to wait for */
3158 wait_for_tids_or_state_change (wait, INFINITE);
3160 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3161 } while(wait->num>0);
3163 /* Mono is shutting down, so just wait for the end */
3164 if (!mono_runtime_try_shutdown ()) {
3165 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3166 mono_thread_suspend (mono_thread_internal_current ());
3167 mono_thread_execute_interruption ();
3171 * Remove everything but the finalizer thread and self.
3172 * Also abort all the background threads
3175 mono_threads_lock ();
3178 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3179 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3180 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3182 mono_threads_unlock ();
3184 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3186 /* Something to wait for */
3187 wait_for_tids (wait, INFINITE);
3189 } while (wait->num > 0);
3192 * give the subthreads a chance to really quit (this is mainly needed
3193 * to get correct user and system times from getrusage/wait/time(1)).
3194 * This could be removed if we avoid pthread_detach() and use pthread_join().
3196 mono_thread_info_yield ();
3200 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3202 MonoInternalThread *thread = (MonoInternalThread*)value;
3203 struct wait_data *wait = (struct wait_data*)user_data;
3207 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3209 * This needs no locking.
3211 if ((thread->state & ThreadState_Suspended) != 0 ||
3212 (thread->state & ThreadState_Stopped) != 0)
3215 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3216 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3220 wait->handles [wait->num] = handle;
3221 wait->threads [wait->num] = thread;
3227 * mono_thread_suspend_all_other_threads:
3229 * Suspend all managed threads except the finalizer thread and this thread. It is
3230 * not possible to resume them later.
3232 void mono_thread_suspend_all_other_threads (void)
3234 struct wait_data wait_data;
3235 struct wait_data *wait = &wait_data;
3237 MonoNativeThreadId self = mono_native_thread_id_get ();
3238 guint32 eventidx = 0;
3239 gboolean starting, finished;
3241 memset (wait, 0, sizeof (struct wait_data));
3243 * The other threads could be in an arbitrary state at this point, i.e.
3244 * they could be starting up, shutting down etc. This means that there could be
3245 * threads which are not even in the threads hash table yet.
3249 * First we set a barrier which will be checked by all threads before they
3250 * are added to the threads hash table, and they will exit if the flag is set.
3251 * This ensures that no threads could be added to the hash later.
3252 * We will use shutting_down as the barrier for now.
3254 g_assert (shutting_down);
3257 * We make multiple calls to WaitForMultipleObjects since:
3258 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3259 * - some threads could exit without becoming suspended
3264 * Make a copy of the hashtable since we can't do anything with
3265 * threads while threads_mutex is held.
3268 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3269 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3270 mono_threads_lock ();
3271 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3272 mono_threads_unlock ();
3275 /* Get the suspended events that we'll be waiting for */
3276 for (i = 0; i < wait->num; ++i) {
3277 MonoInternalThread *thread = wait->threads [i];
3279 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3280 || mono_gc_is_finalizer_internal_thread (thread)
3281 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3283 //CloseHandle (wait->handles [i]);
3284 wait->threads [i] = NULL; /* ignore this thread in next loop */
3288 LOCK_THREAD (thread);
3290 if ((thread->state & ThreadState_Suspended) != 0 ||
3291 (thread->state & ThreadState_StopRequested) != 0 ||
3292 (thread->state & ThreadState_Stopped) != 0) {
3293 UNLOCK_THREAD (thread);
3294 CloseHandle (wait->handles [i]);
3295 wait->threads [i] = NULL; /* ignore this thread in next loop */
3301 /* Convert abort requests into suspend requests */
3302 if ((thread->state & ThreadState_AbortRequested) != 0)
3303 thread->state &= ~ThreadState_AbortRequested;
3305 thread->state |= ThreadState_SuspendRequested;
3307 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3308 async_suspend_internal (thread, TRUE);
3310 if (eventidx <= 0) {
3312 * If there are threads which are starting up, we wait until they
3313 * are suspended when they try to register in the threads hash.
3314 * This is guaranteed to finish, since the threads which can create new
3315 * threads get suspended after a while.
3316 * FIXME: The finalizer thread can still create new threads.
3318 mono_threads_lock ();
3319 if (threads_starting_up)
3320 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3323 mono_threads_unlock ();
3325 mono_thread_info_sleep (100, NULL);
3333 MonoInternalThread *thread;
3334 MonoStackFrameInfo *frames;
3335 int nframes, max_frames;
3336 int nthreads, max_threads;
3337 MonoInternalThread **threads;
3338 } ThreadDumpUserData;
3340 static gboolean thread_dump_requested;
3342 /* This needs to be async safe */
3344 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3346 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3348 if (ud->nframes < ud->max_frames) {
3349 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3356 /* This needs to be async safe */
3357 static SuspendThreadResult
3358 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3360 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3361 MonoInternalThread *thread = user_data->thread;
3364 /* This no longer works with remote unwinding */
3366 wapi_desc = wapi_current_thread_desc ();
3367 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3372 if (thread == mono_thread_internal_current ())
3373 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3375 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3377 return MonoResumeThread;
3381 int nthreads, max_threads;
3382 MonoInternalThread **threads;
3383 } CollectThreadsUserData;
3386 collect_thread (gpointer key, gpointer value, gpointer user)
3388 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3389 MonoInternalThread *thread = (MonoInternalThread *)value;
3391 if (ud->nthreads < ud->max_threads)
3392 ud->threads [ud->nthreads ++] = thread;
3396 * Collect running threads into the THREADS array.
3397 * THREADS should be an array allocated on the stack.
3400 collect_threads (MonoInternalThread **thread_array, int max_threads)
3402 CollectThreadsUserData ud;
3404 memset (&ud, 0, sizeof (ud));
3405 /* This array contains refs, but its on the stack, so its ok */
3406 ud.threads = thread_array;
3407 ud.max_threads = max_threads;
3409 mono_threads_lock ();
3410 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3411 mono_threads_unlock ();
3417 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3419 GString* text = g_string_new (0);
3421 GError *error = NULL;
3424 ud->thread = thread;
3427 /* Collect frames for the thread */
3428 if (thread == mono_thread_internal_current ()) {
3429 get_thread_dump (mono_thread_info_current (), ud);
3431 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3435 * Do all the non async-safe work outside of get_thread_dump.
3438 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3440 g_string_append_printf (text, "\n\"%s\"", name);
3443 else if (thread->threadpool_thread) {
3444 g_string_append (text, "\n\"<threadpool thread>\"");
3446 g_string_append (text, "\n\"<unnamed thread>\"");
3449 for (i = 0; i < ud->nframes; ++i) {
3450 MonoStackFrameInfo *frame = &ud->frames [i];
3451 MonoMethod *method = NULL;
3453 if (frame->type == FRAME_TYPE_MANAGED)
3454 method = mono_jit_info_get_method (frame->ji);
3457 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3458 g_string_append_printf (text, " %s\n", location);
3461 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3465 fprintf (stdout, "%s", text->str);
3467 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3468 OutputDebugStringA(text->str);
3471 g_string_free (text, TRUE);
3476 mono_threads_perform_thread_dump (void)
3478 ThreadDumpUserData ud;
3479 MonoInternalThread *thread_array [128];
3480 int tindex, nthreads;
3482 if (!thread_dump_requested)
3485 printf ("Full thread dump:\n");
3487 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3488 nthreads = collect_threads (thread_array, 128);
3490 memset (&ud, 0, sizeof (ud));
3491 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3492 ud.max_frames = 256;
3494 for (tindex = 0; tindex < nthreads; ++tindex)
3495 dump_thread (thread_array [tindex], &ud);
3499 thread_dump_requested = FALSE;
3502 /* Obtain the thread dump of all threads */
3504 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3508 ThreadDumpUserData ud;
3509 MonoInternalThread *thread_array [128];
3510 MonoDomain *domain = mono_domain_get ();
3511 MonoDebugSourceLocation *location;
3512 int tindex, nthreads;
3514 mono_error_init (&error);
3516 *out_threads = NULL;
3517 *out_stack_frames = NULL;
3519 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3520 nthreads = collect_threads (thread_array, 128);
3522 memset (&ud, 0, sizeof (ud));
3523 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3524 ud.max_frames = 256;
3526 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3527 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3529 for (tindex = 0; tindex < nthreads; ++tindex) {
3530 MonoInternalThread *thread = thread_array [tindex];
3531 MonoArray *thread_frames;
3537 /* Collect frames for the thread */
3538 if (thread == mono_thread_internal_current ()) {
3539 get_thread_dump (mono_thread_info_current (), &ud);
3541 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3544 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3546 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3547 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3549 for (i = 0; i < ud.nframes; ++i) {
3550 MonoStackFrameInfo *frame = &ud.frames [i];
3551 MonoMethod *method = NULL;
3552 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3553 if (!mono_error_ok (&error))
3556 sf->native_offset = frame->native_offset;
3558 if (frame->type == FRAME_TYPE_MANAGED)
3559 method = mono_jit_info_get_method (frame->ji);
3562 sf->method_address = (gsize) frame->ji->code_start;
3564 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3565 mono_error_raise_exception (&error); /* FIXME don't raise here */
3566 MONO_OBJECT_SETREF (sf, method, rm);
3568 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3570 sf->il_offset = location->il_offset;
3572 if (location && location->source_file) {
3573 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3574 sf->line = location->row;
3575 sf->column = location->column;
3577 mono_debug_free_source_location (location);
3582 mono_array_setref (thread_frames, i, sf);
3588 mono_error_raise_exception (&error); /* FIXME don't raise here */
3592 * mono_threads_request_thread_dump:
3594 * Ask all threads except the current to print their stacktrace to stdout.
3597 mono_threads_request_thread_dump (void)
3599 /*The new thread dump code runs out of the finalizer thread. */
3600 thread_dump_requested = TRUE;
3601 mono_gc_finalize_notify ();
3606 gint allocated; /* +1 so that refs [allocated] == NULL */
3610 typedef struct ref_stack RefStack;
3613 ref_stack_new (gint initial_size)
3617 initial_size = MAX (initial_size, 16) + 1;
3618 rs = g_new0 (RefStack, 1);
3619 rs->refs = g_new0 (gpointer, initial_size);
3620 rs->allocated = initial_size;
3625 ref_stack_destroy (gpointer ptr)
3627 RefStack *rs = (RefStack *)ptr;
3636 ref_stack_push (RefStack *rs, gpointer ptr)
3638 g_assert (rs != NULL);
3640 if (rs->bottom >= rs->allocated) {
3641 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3642 rs->allocated <<= 1;
3643 rs->refs [rs->allocated] = NULL;
3645 rs->refs [rs->bottom++] = ptr;
3649 ref_stack_pop (RefStack *rs)
3651 if (rs == NULL || rs->bottom == 0)
3655 rs->refs [rs->bottom] = NULL;
3659 ref_stack_find (RefStack *rs, gpointer ptr)
3666 for (refs = rs->refs; refs && *refs; refs++) {
3674 * mono_thread_push_appdomain_ref:
3676 * Register that the current thread may have references to objects in domain
3677 * @domain on its stack. Each call to this function should be paired with a
3678 * call to pop_appdomain_ref.
3681 mono_thread_push_appdomain_ref (MonoDomain *domain)
3683 MonoInternalThread *thread = mono_thread_internal_current ();
3686 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3687 SPIN_LOCK (thread->lock_thread_id);
3688 if (thread->appdomain_refs == NULL)
3689 thread->appdomain_refs = ref_stack_new (16);
3690 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3691 SPIN_UNLOCK (thread->lock_thread_id);
3696 mono_thread_pop_appdomain_ref (void)
3698 MonoInternalThread *thread = mono_thread_internal_current ();
3701 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3702 SPIN_LOCK (thread->lock_thread_id);
3703 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3704 SPIN_UNLOCK (thread->lock_thread_id);
3709 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3712 SPIN_LOCK (thread->lock_thread_id);
3713 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3714 SPIN_UNLOCK (thread->lock_thread_id);
3719 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3721 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3724 typedef struct abort_appdomain_data {
3725 struct wait_data wait;
3727 } abort_appdomain_data;
3730 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3732 MonoInternalThread *thread = (MonoInternalThread*)value;
3733 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3734 MonoDomain *domain = data->domain;
3736 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3737 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3739 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3740 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3743 data->wait.handles [data->wait.num] = handle;
3744 data->wait.threads [data->wait.num] = thread;
3747 /* Just ignore the rest, we can't do anything with
3755 * mono_threads_abort_appdomain_threads:
3757 * Abort threads which has references to the given appdomain.
3760 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3762 #ifdef __native_client__
3766 abort_appdomain_data user_data;
3768 int orig_timeout = timeout;
3771 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3773 start_time = mono_msec_ticks ();
3775 mono_threads_lock ();
3777 user_data.domain = domain;
3778 user_data.wait.num = 0;
3779 /* This shouldn't take any locks */
3780 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3781 mono_threads_unlock ();
3783 if (user_data.wait.num > 0) {
3784 /* Abort the threads outside the threads lock */
3785 for (i = 0; i < user_data.wait.num; ++i)
3786 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3789 * We should wait for the threads either to abort, or to leave the
3790 * domain. We can't do the latter, so we wait with a timeout.
3792 wait_for_tids (&user_data.wait, 100);
3795 /* Update remaining time */
3796 timeout -= mono_msec_ticks () - start_time;
3797 start_time = mono_msec_ticks ();
3799 if (orig_timeout != -1 && timeout < 0)
3802 while (user_data.wait.num > 0);
3804 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3810 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3812 MonoInternalThread *thread = (MonoInternalThread*)value;
3813 MonoDomain *domain = (MonoDomain*)user_data;
3816 /* No locking needed here */
3817 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3819 if (thread->cached_culture_info) {
3820 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3821 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3822 if (obj && obj->vtable->domain == domain)
3823 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3829 * mono_threads_clear_cached_culture:
3831 * Clear the cached_current_culture from all threads if it is in the
3835 mono_threads_clear_cached_culture (MonoDomain *domain)
3837 mono_threads_lock ();
3838 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3839 mono_threads_unlock ();
3843 * mono_thread_get_undeniable_exception:
3845 * Return an exception which needs to be raised when leaving a catch clause.
3846 * This is used for undeniable exception propagation.
3849 mono_thread_get_undeniable_exception (void)
3851 MonoInternalThread *thread = mono_thread_internal_current ();
3853 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3855 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3856 * exception if the thread no longer references a dying appdomain.
3858 thread->abort_exc->trace_ips = NULL;
3859 thread->abort_exc->stack_trace = NULL;
3860 return thread->abort_exc;
3866 #if MONO_SMALL_CONFIG
3867 #define NUM_STATIC_DATA_IDX 4
3868 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3872 #define NUM_STATIC_DATA_IDX 8
3873 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3874 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3878 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3879 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3882 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3884 gpointer *static_data = (gpointer *)addr;
3886 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3887 void **ptr = (void **)static_data [i];
3892 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3893 void **p = ptr + idx;
3896 mark_func ((MonoObject**)p, gc_data);
3902 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3904 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3908 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3910 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3914 * mono_alloc_static_data
3916 * Allocate memory blocks for storing threads or context static data
3919 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3921 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3924 gpointer* static_data = *static_data_ptr;
3926 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3927 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3929 if (mono_gc_user_markers_supported ()) {
3930 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3931 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3933 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3934 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3937 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3938 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3939 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3940 *static_data_ptr = static_data;
3941 static_data [0] = static_data;
3944 for (i = 1; i <= idx; ++i) {
3945 if (static_data [i])
3948 if (mono_gc_user_markers_supported ())
3949 static_data [i] = g_malloc0 (static_data_size [i]);
3951 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3952 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3953 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3958 mono_free_static_data (gpointer* static_data)
3961 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3962 gpointer p = static_data [i];
3966 * At this point, the static data pointer array is still registered with the
3967 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3968 * data. Freeing the individual arrays without first nulling their slots
3969 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3970 * such an already freed array. See bug #13813.
3972 static_data [i] = NULL;
3973 mono_memory_write_barrier ();
3974 if (mono_gc_user_markers_supported ())
3977 mono_gc_free_fixed (p);
3979 mono_gc_free_fixed (static_data);
3983 * mono_init_static_data_info
3985 * Initializes static data counters
3987 static void mono_init_static_data_info (StaticDataInfo *static_data)
3989 static_data->idx = 0;
3990 static_data->offset = 0;
3991 static_data->freelist = NULL;
3995 * mono_alloc_static_data_slot
3997 * Generates an offset for static data. static_data contains the counters
3998 * used to generate it.
4001 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4003 if (!static_data->idx && !static_data->offset) {
4005 * we use the first chunk of the first allocation also as
4006 * an array for the rest of the data
4008 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4010 static_data->offset += align - 1;
4011 static_data->offset &= ~(align - 1);
4012 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4013 static_data->idx ++;
4014 g_assert (size <= static_data_size [static_data->idx]);
4015 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4016 static_data->offset = 0;
4018 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4019 static_data->offset += size;
4024 * ensure thread static fields already allocated are valid for thread
4025 * This function is called when a thread is created or on thread attach.
4028 thread_adjust_static_data (MonoInternalThread *thread)
4030 mono_threads_lock ();
4031 if (thread_static_info.offset || thread_static_info.idx > 0) {
4032 /* get the current allocated size */
4033 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4034 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4036 mono_threads_unlock ();
4040 * LOCKING: requires that threads_mutex is held
4043 context_adjust_static_data (MonoAppContext *ctx)
4045 if (context_static_info.offset || context_static_info.idx > 0) {
4046 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4047 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4048 ctx->data->static_data = ctx->static_data;
4053 * LOCKING: requires that threads_mutex is held
4056 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4058 MonoInternalThread *thread = (MonoInternalThread *)value;
4059 guint32 offset = GPOINTER_TO_UINT (user);
4061 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4065 * LOCKING: requires that threads_mutex is held
4068 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4070 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4075 guint32 offset = GPOINTER_TO_UINT (user);
4076 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4077 ctx->data->static_data = ctx->static_data;
4080 static StaticDataFreeList*
4081 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4083 StaticDataFreeList* prev = NULL;
4084 StaticDataFreeList* tmp = static_data->freelist;
4086 if (tmp->size == size) {
4088 prev->next = tmp->next;
4090 static_data->freelist = tmp->next;
4099 #if SIZEOF_VOID_P == 4
4106 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4108 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4110 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4111 MonoBitSet *rb = sets [idx];
4112 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4113 offset /= sizeof (uintptr_t);
4114 /* offset is now the bitmap offset */
4115 for (int i = 0; i < numbits; ++i) {
4116 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4117 mono_bitset_set_fast (rb, offset + i);
4122 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4124 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4125 MonoBitSet *rb = sets [idx];
4126 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4127 offset /= sizeof (uintptr_t);
4128 /* offset is now the bitmap offset */
4129 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4130 mono_bitset_clear_fast (rb, offset + i);
4134 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4136 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4138 StaticDataInfo *info;
4141 if (static_type == SPECIAL_STATIC_THREAD) {
4142 info = &thread_static_info;
4143 sets = thread_reference_bitmaps;
4145 info = &context_static_info;
4146 sets = context_reference_bitmaps;
4149 mono_threads_lock ();
4151 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4155 offset = item->offset;
4158 offset = mono_alloc_static_data_slot (info, size, align);
4161 update_reference_bitmap (sets, offset, bitmap, numbits);
4163 if (static_type == SPECIAL_STATIC_THREAD) {
4164 /* This can be called during startup */
4165 if (threads != NULL)
4166 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4168 if (contexts != NULL)
4169 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4171 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4174 mono_threads_unlock ();
4180 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4182 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4184 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4185 return get_thread_static_data (thread, offset);
4187 return get_context_static_data (thread->current_appcontext, offset);
4192 mono_get_special_static_data (guint32 offset)
4194 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4203 * LOCKING: requires that threads_mutex is held
4206 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4208 MonoInternalThread *thread = (MonoInternalThread *)value;
4209 OffsetSize *data = (OffsetSize *)user;
4210 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4211 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4214 if (!thread->static_data || !thread->static_data [idx])
4216 ptr = ((char*) thread->static_data [idx]) + off;
4217 mono_gc_bzero_atomic (ptr, data->size);
4221 * LOCKING: requires that threads_mutex is held
4224 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4226 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4231 OffsetSize *data = (OffsetSize *)user;
4232 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4233 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4236 if (!ctx->static_data || !ctx->static_data [idx])
4239 ptr = ((char*) ctx->static_data [idx]) + off;
4240 mono_gc_bzero_atomic (ptr, data->size);
4244 do_free_special_slot (guint32 offset, guint32 size)
4246 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4248 StaticDataInfo *info;
4250 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4251 info = &thread_static_info;
4252 sets = thread_reference_bitmaps;
4254 info = &context_static_info;
4255 sets = context_reference_bitmaps;
4258 guint32 data_offset = offset;
4259 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4260 OffsetSize data = { data_offset, size };
4262 clear_reference_bitmap (sets, data.offset, data.size);
4264 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4265 if (threads != NULL)
4266 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4268 if (contexts != NULL)
4269 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4272 if (!mono_runtime_is_shutting_down ()) {
4273 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4275 item->offset = offset;
4278 item->next = info->freelist;
4279 info->freelist = item;
4284 do_free_special (gpointer key, gpointer value, gpointer data)
4286 MonoClassField *field = (MonoClassField *)key;
4287 guint32 offset = GPOINTER_TO_UINT (value);
4290 size = mono_type_size (field->type, &align);
4291 do_free_special_slot (offset, size);
4295 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4297 mono_threads_lock ();
4299 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4301 mono_threads_unlock ();
4305 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4307 /* Only ever called for ThreadLocal instances */
4308 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4310 mono_threads_lock ();
4311 do_free_special_slot (offset, size);
4312 mono_threads_unlock ();
4316 static void CALLBACK dummy_apc (ULONG_PTR param)
4322 * mono_thread_execute_interruption
4324 * Performs the operation that the requested thread state requires (abort,
4327 static MonoException*
4328 mono_thread_execute_interruption (void)
4330 MonoInternalThread *thread = mono_thread_internal_current ();
4331 MonoThread *sys_thread = mono_thread_current ();
4333 LOCK_THREAD (thread);
4335 /* MonoThread::interruption_requested can only be changed with atomics */
4336 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4337 /* this will consume pending APC calls */
4339 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4341 InterlockedDecrement (&thread_interruption_requested);
4343 /* Clear the interrupted flag of the thread so it can wait again */
4344 mono_thread_info_clear_self_interrupt ();
4347 if ((thread->state & ThreadState_AbortRequested) != 0) {
4348 UNLOCK_THREAD (thread);
4349 if (thread->abort_exc == NULL) {
4351 * This might be racy, but it has to be called outside the lock
4352 * since it calls managed code.
4354 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4356 return thread->abort_exc;
4358 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4359 /* calls UNLOCK_THREAD (thread) */
4360 self_suspend_internal ();
4363 else if ((thread->state & ThreadState_StopRequested) != 0) {
4364 /* FIXME: do this through the JIT? */
4366 UNLOCK_THREAD (thread);
4368 mono_thread_exit ();
4370 } else if (sys_thread->pending_exception) {
4373 exc = sys_thread->pending_exception;
4374 sys_thread->pending_exception = NULL;
4376 UNLOCK_THREAD (thread);
4378 } else if (thread->thread_interrupt_requested) {
4380 thread->thread_interrupt_requested = FALSE;
4381 UNLOCK_THREAD (thread);
4383 return(mono_get_exception_thread_interrupted ());
4386 UNLOCK_THREAD (thread);
4392 * mono_thread_request_interruption
4394 * A signal handler can call this method to request the interruption of a
4395 * thread. The result of the interruption will depend on the current state of
4396 * the thread. If the result is an exception that needs to be throw, it is
4397 * provided as return value.
4400 mono_thread_request_interruption (gboolean running_managed)
4402 MonoInternalThread *thread = mono_thread_internal_current ();
4404 /* The thread may already be stopping */
4409 if (thread->interrupt_on_stop &&
4410 thread->state & ThreadState_StopRequested &&
4411 thread->state & ThreadState_Background)
4415 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4417 InterlockedIncrement (&thread_interruption_requested);
4419 if (!running_managed || is_running_protected_wrapper ()) {
4420 /* Can't stop while in unmanaged code. Increase the global interruption
4421 request count. When exiting the unmanaged method the count will be
4422 checked and the thread will be interrupted. */
4424 /* this will awake the thread if it is in WaitForSingleObject
4426 /* Our implementation of this function ignores the func argument */
4428 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4430 mono_thread_info_self_interrupt ();
4435 return mono_thread_execute_interruption ();
4439 /*This function should be called by a thread after it has exited all of
4440 * its handle blocks at interruption time.*/
4442 mono_thread_resume_interruption (void)
4444 MonoInternalThread *thread = mono_thread_internal_current ();
4445 gboolean still_aborting;
4447 /* The thread may already be stopping */
4451 LOCK_THREAD (thread);
4452 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4453 UNLOCK_THREAD (thread);
4455 /*This can happen if the protected block called Thread::ResetAbort*/
4456 if (!still_aborting)
4459 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4461 InterlockedIncrement (&thread_interruption_requested);
4463 mono_thread_info_self_interrupt ();
4465 return mono_thread_execute_interruption ();
4468 gboolean mono_thread_interruption_requested ()
4470 if (thread_interruption_requested) {
4471 MonoInternalThread *thread = mono_thread_internal_current ();
4472 /* The thread may already be stopping */
4474 return (thread->interruption_requested);
4479 static MonoException*
4480 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4482 MonoInternalThread *thread = mono_thread_internal_current ();
4484 /* The thread may already be stopping */
4488 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4489 MonoException* exc = mono_thread_execute_interruption ();
4497 * Performs the interruption of the current thread, if one has been requested,
4498 * and the thread is not running a protected wrapper.
4499 * Return the exception which needs to be thrown, if any.
4502 mono_thread_interruption_checkpoint (void)
4504 return mono_thread_interruption_checkpoint_request (FALSE);
4508 * Performs the interruption of the current thread, if one has been requested.
4509 * Return the exception which needs to be thrown, if any.
4512 mono_thread_force_interruption_checkpoint_noraise (void)
4514 return mono_thread_interruption_checkpoint_request (TRUE);
4518 * mono_thread_get_and_clear_pending_exception:
4520 * Return any pending exceptions for the current thread and clear it as a side effect.
4523 mono_thread_get_and_clear_pending_exception (void)
4525 MonoInternalThread *thread = mono_thread_internal_current ();
4526 MonoThread *sys_thread = mono_thread_current ();
4528 /* The thread may already be stopping */
4532 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4533 return mono_thread_execute_interruption ();
4536 if (sys_thread->pending_exception) {
4537 MonoException *exc = sys_thread->pending_exception;
4539 sys_thread->pending_exception = NULL;
4547 * mono_set_pending_exception:
4549 * Set the pending exception of the current thread to EXC.
4550 * The exception will be thrown when execution returns to managed code.
4553 mono_set_pending_exception (MonoException *exc)
4555 MonoThread *thread = mono_thread_current ();
4557 /* The thread may already be stopping */
4561 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4563 mono_thread_request_interruption (FALSE);
4567 * mono_thread_interruption_request_flag:
4569 * Returns the address of a flag that will be non-zero if an interruption has
4570 * been requested for a thread. The thread to interrupt may not be the current
4571 * thread, so an additional call to mono_thread_interruption_requested() or
4572 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4575 gint32* mono_thread_interruption_request_flag ()
4577 return &thread_interruption_requested;
4581 mono_thread_init_apartment_state (void)
4584 MonoInternalThread* thread = mono_thread_internal_current ();
4586 /* Positive return value indicates success, either
4587 * S_OK if this is first CoInitialize call, or
4588 * S_FALSE if CoInitialize already called, but with same
4589 * threading model. A negative value indicates failure,
4590 * probably due to trying to change the threading model.
4592 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4593 ? COINIT_APARTMENTTHREADED
4594 : COINIT_MULTITHREADED) < 0) {
4595 thread->apartment_state = ThreadApartmentState_Unknown;
4601 mono_thread_cleanup_apartment_state (void)
4604 MonoInternalThread* thread = mono_thread_internal_current ();
4606 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4613 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4615 LOCK_THREAD (thread);
4616 thread->state |= state;
4617 UNLOCK_THREAD (thread);
4621 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4623 LOCK_THREAD (thread);
4624 thread->state &= ~state;
4625 UNLOCK_THREAD (thread);
4629 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4631 gboolean ret = FALSE;
4633 LOCK_THREAD (thread);
4635 if ((thread->state & test) != 0) {
4639 UNLOCK_THREAD (thread);
4644 static gboolean has_tls_get = FALSE;
4647 mono_runtime_set_has_tls_get (gboolean val)
4653 mono_runtime_has_tls_get (void)
4659 self_interrupt_thread (void *_unused)
4661 MonoThreadInfo *info = mono_thread_info_current ();
4662 MonoException *exc = mono_thread_execute_interruption ();
4663 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4664 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. */
4665 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4669 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4673 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4677 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4679 MonoJitInfo **dest = (MonoJitInfo **)data;
4685 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4687 MonoJitInfo *ji = NULL;
4690 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4695 MonoInternalThread *thread;
4696 gboolean install_async_abort;
4697 MonoThreadInfoInterruptToken *interrupt_token;
4700 static SuspendThreadResult
4701 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4703 AbortThreadData *data = (AbortThreadData *)ud;
4704 MonoInternalThread *thread = data->thread;
4705 MonoJitInfo *ji = NULL;
4706 gboolean protected_wrapper;
4707 gboolean running_managed;
4709 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4710 return MonoResumeThread;
4712 /*someone is already interrupting it*/
4713 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4714 return MonoResumeThread;
4716 InterlockedIncrement (&thread_interruption_requested);
4718 ji = mono_thread_info_get_last_managed (info);
4719 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4720 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4722 if (!protected_wrapper && running_managed) {
4723 /*We are in managed code*/
4724 /*Set the thread to call */
4725 if (data->install_async_abort)
4726 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4727 return MonoResumeThread;
4730 * This will cause waits to be broken.
4731 * It will also prevent the thread from entering a wait, so if the thread returns
4732 * from the wait before it receives the abort signal, it will just spin in the wait
4733 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4736 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4738 return MonoResumeThread;
4743 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4745 AbortThreadData data;
4747 g_assert (thread != mono_thread_internal_current ());
4749 data.thread = thread;
4750 data.install_async_abort = install_async_abort;
4751 data.interrupt_token = NULL;
4753 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4754 if (data.interrupt_token)
4755 mono_thread_info_finish_interrupt (data.interrupt_token);
4756 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4760 self_abort_internal (void)
4764 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4765 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4767 exc = mono_thread_request_interruption (TRUE);
4769 mono_raise_exception (exc);
4771 mono_thread_info_self_interrupt ();
4775 MonoInternalThread *thread;
4777 MonoThreadInfoInterruptToken *interrupt_token;
4778 } SuspendThreadData;
4780 static SuspendThreadResult
4781 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4783 SuspendThreadData *data = (SuspendThreadData *)ud;
4784 MonoInternalThread *thread = data->thread;
4785 MonoJitInfo *ji = NULL;
4786 gboolean protected_wrapper;
4787 gboolean running_managed;
4789 ji = mono_thread_info_get_last_managed (info);
4790 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4791 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4793 if (running_managed && !protected_wrapper) {
4794 thread->state &= ~ThreadState_SuspendRequested;
4795 thread->state |= ThreadState_Suspended;
4796 return KeepSuspended;
4798 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4799 InterlockedIncrement (&thread_interruption_requested);
4800 if (data->interrupt)
4801 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4803 return MonoResumeThread;
4807 /* LOCKING: called with @thread synch_cs held, and releases it */
4809 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4811 SuspendThreadData data;
4813 g_assert (thread != mono_thread_internal_current ());
4815 data.thread = thread;
4816 data.interrupt = interrupt;
4817 data.interrupt_token = NULL;
4819 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4820 if (data.interrupt_token)
4821 mono_thread_info_finish_interrupt (data.interrupt_token);
4823 UNLOCK_THREAD (thread);
4826 /* LOCKING: called with @thread synch_cs held, and releases it */
4828 self_suspend_internal (void)
4830 MonoInternalThread *thread;
4832 thread = mono_thread_internal_current ();
4834 mono_thread_info_begin_self_suspend ();
4835 thread->state &= ~ThreadState_SuspendRequested;
4836 thread->state |= ThreadState_Suspended;
4838 UNLOCK_THREAD (thread);
4840 mono_thread_info_end_self_suspend ();
4844 * mono_thread_is_foreign:
4845 * @thread: the thread to query
4847 * This function allows one to determine if a thread was created by the mono runtime and has
4848 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4850 * Returns: TRUE if @thread was not created by the runtime.
4853 mono_thread_is_foreign (MonoThread *thread)
4855 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4856 return info->runtime_thread == FALSE;
4860 * mono_add_joinable_thread:
4862 * Add TID to the list of joinable threads.
4863 * LOCKING: Acquires the threads lock.
4866 mono_threads_add_joinable_thread (gpointer tid)
4870 * We cannot detach from threads because it causes problems like
4871 * 2fd16f60/r114307. So we collect them and join them when
4872 * we have time (in he finalizer thread).
4874 joinable_threads_lock ();
4875 if (!joinable_threads)
4876 joinable_threads = g_hash_table_new (NULL, NULL);
4877 g_hash_table_insert (joinable_threads, tid, tid);
4878 joinable_thread_count ++;
4879 joinable_threads_unlock ();
4881 mono_gc_finalize_notify ();
4886 * mono_threads_join_threads:
4888 * Join all joinable threads. This is called from the finalizer thread.
4889 * LOCKING: Acquires the threads lock.
4892 mono_threads_join_threads (void)
4895 GHashTableIter iter;
4902 if (!joinable_thread_count)
4906 joinable_threads_lock ();
4908 if (g_hash_table_size (joinable_threads)) {
4909 g_hash_table_iter_init (&iter, joinable_threads);
4910 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4911 thread = (pthread_t)tid;
4912 g_hash_table_remove (joinable_threads, key);
4913 joinable_thread_count --;
4916 joinable_threads_unlock ();
4918 if (thread != pthread_self ())
4919 /* This shouldn't block */
4920 pthread_join (thread, NULL);
4931 * Wait for thread TID to exit.
4932 * LOCKING: Acquires the threads lock.
4935 mono_thread_join (gpointer tid)
4939 gboolean found = FALSE;
4941 joinable_threads_lock ();
4942 if (!joinable_threads)
4943 joinable_threads = g_hash_table_new (NULL, NULL);
4944 if (g_hash_table_lookup (joinable_threads, tid)) {
4945 g_hash_table_remove (joinable_threads, tid);
4946 joinable_thread_count --;
4949 joinable_threads_unlock ();
4952 thread = (pthread_t)tid;
4953 pthread_join (thread, NULL);
4958 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4960 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4961 mono_thread_interruption_checkpoint ();
4964 static inline gboolean
4965 is_appdomainunloaded_exception (MonoClass *klass)
4967 return klass == mono_class_get_appdomain_unloaded_exception_class ();
4970 static inline gboolean
4971 is_threadabort_exception (MonoClass *klass)
4973 return klass == mono_defaults.threadabortexception_class;
4977 mono_thread_internal_unhandled_exception (MonoObject* exc)
4979 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4980 MonoClass *klass = exc->vtable->klass;
4981 if (is_threadabort_exception (klass)) {
4982 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4983 } else if (!is_appdomainunloaded_exception (klass)) {
4984 mono_unhandled_exception (exc);
4985 if (mono_environment_exitcode_get () == 1)
4992 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4994 mono_threads_get_thread_dump (out_threads, out_stack_traces);