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)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
45 #include <mono/metadata/gc-internals.h>
46 #include <mono/metadata/reflection-internals.h>
52 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
53 #define USE_TKILL_ON_ANDROID 1
56 #ifdef PLATFORM_ANDROID
59 #ifdef USE_TKILL_ON_ANDROID
60 extern int tkill (pid_t tid, int signal);
64 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_DEBUG(a)
66 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
67 #define THREAD_WAIT_DEBUG(a)
68 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
69 #define LIBGC_DEBUG(a)
71 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
72 #define SPIN_LOCK(i) do { \
73 if (SPIN_TRYLOCK (i)) \
77 #define SPIN_UNLOCK(i) i = 0
79 #define LOCK_THREAD(thread) lock_thread((thread))
80 #define UNLOCK_THREAD(thread) unlock_thread((thread))
82 /* Provide this for systems with glib < 2.6 */
83 #ifndef G_GSIZE_FORMAT
84 # if GLIB_SIZEOF_LONG == 8
85 # define G_GSIZE_FORMAT "lu"
87 # define G_GSIZE_FORMAT "u"
93 guint32 (*func)(void *);
109 typedef struct _StaticDataFreeList StaticDataFreeList;
110 struct _StaticDataFreeList {
111 StaticDataFreeList *next;
119 StaticDataFreeList *freelist;
122 /* Number of cached culture objects in the MonoThread->cached_culture_info array
123 * (per-type): we use the first NUM entries for CultureInfo and the last for
124 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
126 #define NUM_CACHED_CULTURES 4
127 #define CULTURES_START_IDX 0
128 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
130 /* Controls access to the 'threads' hash table */
131 static void mono_threads_lock (void);
132 static void mono_threads_unlock (void);
133 static MonoCoopMutex threads_mutex;
135 /* Controls access to the 'joinable_threads' hash table */
136 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
137 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
138 static mono_mutex_t joinable_threads_mutex;
140 /* Holds current status of static data heap */
141 static StaticDataInfo thread_static_info;
142 static StaticDataInfo context_static_info;
144 /* The hash of existing threads (key is thread ID, value is
145 * MonoInternalThread*) that need joining before exit
147 static MonoGHashTable *threads=NULL;
149 /* List of app context GC handles.
150 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
152 static GHashTable *contexts = NULL;
154 /* Cleanup queue for contexts. */
155 static MonoReferenceQueue *context_queue;
158 * Threads which are starting up and they are not in the 'threads' hash yet.
159 * When handle_store is called for a thread, it will be removed from this hash table.
160 * Protected by mono_threads_lock ().
162 static MonoGHashTable *threads_starting_up = NULL;
164 /* The TLS key that holds the MonoObject assigned to each thread */
165 static MonoNativeTlsKey current_object_key;
168 /* Protected by the threads lock */
169 static GHashTable *joinable_threads;
170 static int joinable_thread_count;
172 #ifdef MONO_HAVE_FAST_TLS
173 /* we need to use both the Tls* functions and __thread because
174 * the gc needs to see all the threads
176 MONO_FAST_TLS_DECLARE(tls_current_object);
177 #define SET_CURRENT_OBJECT(x) do { \
178 MONO_FAST_TLS_SET (tls_current_object, x); \
179 mono_native_tls_set_value (current_object_key, x); \
181 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
183 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
184 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
187 /* function called at thread start */
188 static MonoThreadStartCB mono_thread_start_cb = NULL;
190 /* function called at thread attach */
191 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
193 /* function called at thread cleanup */
194 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
196 /* The default stack size for each thread */
197 static guint32 default_stacksize = 0;
198 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
200 static void thread_adjust_static_data (MonoInternalThread *thread);
201 static void context_adjust_static_data (MonoAppContext *ctx);
202 static void mono_free_static_data (gpointer* static_data);
203 static void mono_init_static_data_info (StaticDataInfo *static_data);
204 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
205 static gboolean mono_thread_resume (MonoInternalThread* thread);
206 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
207 static void self_abort_internal (void);
208 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
209 static void self_suspend_internal (void);
211 static MonoException* mono_thread_execute_interruption (void);
212 static void ref_stack_destroy (gpointer rs);
214 /* Spin lock for InterlockedXXX 64 bit functions */
215 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
216 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
217 static mono_mutex_t interlocked_mutex;
219 /* global count of thread interruptions requested */
220 static gint32 thread_interruption_requested = 0;
222 /* Event signaled when a thread changes its background mode */
223 static HANDLE background_change_event;
225 static gboolean shutting_down = FALSE;
227 static gint32 managed_thread_id_counter = 0;
229 /* Class lazy loading functions */
230 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
233 mono_threads_lock (void)
235 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
239 mono_threads_unlock (void)
241 mono_locks_coop_release (&threads_mutex, ThreadsLock);
246 get_next_managed_thread_id (void)
248 return InterlockedIncrement (&managed_thread_id_counter);
252 mono_thread_get_tls_key (void)
254 return current_object_key;
258 mono_thread_get_tls_offset (void)
263 if (current_object_key)
264 offset = current_object_key;
266 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
271 static inline MonoNativeThreadId
272 thread_get_tid (MonoInternalThread *thread)
274 /* We store the tid as a guint64 to keep the object layout constant between platforms */
275 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
278 /* handle_store() and handle_remove() manage the array of threads that
279 * still need to be waited for when the main thread exits.
281 * If handle_store() returns FALSE the thread must not be started
282 * because Mono is shutting down.
284 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
286 mono_threads_lock ();
288 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
290 if (threads_starting_up)
291 mono_g_hash_table_remove (threads_starting_up, thread);
293 if (shutting_down && !force_attach) {
294 mono_threads_unlock ();
299 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
300 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
303 /* We don't need to duplicate thread->handle, because it is
304 * only closed when the thread object is finalized by the GC.
306 g_assert (thread->internal_thread);
307 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
308 thread->internal_thread);
310 mono_threads_unlock ();
315 static gboolean handle_remove(MonoInternalThread *thread)
318 gsize tid = thread->tid;
320 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
322 mono_threads_lock ();
325 /* We have to check whether the thread object for the
326 * tid is still the same in the table because the
327 * thread might have been destroyed and the tid reused
328 * in the meantime, in which case the tid would be in
329 * the table, but with another thread object.
331 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
332 mono_g_hash_table_remove (threads, (gpointer)tid);
341 mono_threads_unlock ();
343 /* Don't close the handle here, wait for the object finalizer
344 * to do it. Otherwise, the following race condition applies:
346 * 1) Thread exits (and handle_remove() closes the handle)
348 * 2) Some other handle is reassigned the same slot
350 * 3) Another thread tries to join the first thread, and
351 * blocks waiting for the reassigned handle to be signalled
352 * (which might never happen). This is possible, because the
353 * thread calling Join() still has a reference to the first
359 static void ensure_synch_cs_set (MonoInternalThread *thread)
361 MonoCoopMutex *synch_cs;
363 if (thread->synch_cs != NULL) {
367 synch_cs = g_new0 (MonoCoopMutex, 1);
368 mono_coop_mutex_init_recursive (synch_cs);
370 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
371 synch_cs, NULL) != NULL) {
372 /* Another thread must have installed this CS */
373 mono_coop_mutex_destroy (synch_cs);
379 lock_thread (MonoInternalThread *thread)
381 if (!thread->synch_cs)
382 ensure_synch_cs_set (thread);
384 g_assert (thread->synch_cs);
386 mono_coop_mutex_lock (thread->synch_cs);
390 unlock_thread (MonoInternalThread *thread)
392 mono_coop_mutex_unlock (thread->synch_cs);
396 * NOTE: this function can be called also for threads different from the current one:
397 * make sure no code called from it will ever assume it is run on the thread that is
398 * getting cleaned up.
400 static void thread_cleanup (MonoInternalThread *thread)
402 g_assert (thread != NULL);
404 if (thread->abort_state_handle) {
405 mono_gchandle_free (thread->abort_state_handle);
406 thread->abort_state_handle = 0;
408 thread->abort_exc = NULL;
409 thread->current_appcontext = NULL;
412 * This is necessary because otherwise we might have
413 * cross-domain references which will not get cleaned up when
414 * the target domain is unloaded.
416 if (thread->cached_culture_info) {
418 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
419 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
423 * thread->synch_cs can be NULL if this was called after
424 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
425 * This can happen only during shutdown.
426 * The shutting_down flag is not always set, so we can't assert on it.
428 if (thread->synch_cs)
429 LOCK_THREAD (thread);
431 thread->state |= ThreadState_Stopped;
432 thread->state &= ~ThreadState_Background;
434 if (thread->synch_cs)
435 UNLOCK_THREAD (thread);
438 An interruption request has leaked to cleanup. Adjust the global counter.
440 This can happen is the abort source thread finds the abortee (this) thread
441 in unmanaged code. If this thread never trips back to managed code or check
442 the local flag it will be left set and positively unbalance the global counter.
444 Leaving the counter unbalanced will cause a performance degradation since all threads
445 will now keep checking their local flags all the time.
447 if (InterlockedExchange (&thread->interruption_requested, 0))
448 InterlockedDecrement (&thread_interruption_requested);
450 /* if the thread is not in the hash it has been removed already */
451 if (!handle_remove (thread)) {
452 if (thread == mono_thread_internal_current ()) {
453 mono_domain_unset ();
454 mono_memory_barrier ();
456 /* This needs to be called even if handle_remove () fails */
457 if (mono_thread_cleanup_fn)
458 mono_thread_cleanup_fn (thread_get_tid (thread));
461 mono_release_type_locks (thread);
463 /* Can happen when we attach the profiler helper thread in order to heapshot. */
464 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
465 mono_profiler_thread_end (thread->tid);
467 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
469 if (thread == mono_thread_internal_current ()) {
471 * This will signal async signal handlers that the thread has exited.
472 * The profiler callback needs this to be set, so it cannot be done earlier.
474 mono_domain_unset ();
475 mono_memory_barrier ();
478 if (thread == mono_thread_internal_current ())
479 mono_thread_pop_appdomain_ref ();
481 thread->cached_culture_info = NULL;
483 mono_free_static_data (thread->static_data);
484 thread->static_data = NULL;
485 ref_stack_destroy (thread->appdomain_refs);
486 thread->appdomain_refs = NULL;
488 if (mono_thread_cleanup_fn)
489 mono_thread_cleanup_fn (thread_get_tid (thread));
491 if (mono_gc_is_moving ()) {
492 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
493 thread->thread_pinning_ref = NULL;
499 * A special static data offset (guint32) consists of 3 parts:
501 * [0] 6-bit index into the array of chunks.
502 * [6] 25-bit offset into the array.
503 * [31] Bit indicating thread or context static.
508 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
519 } SpecialStaticOffset;
521 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
522 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
524 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
525 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
526 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
527 (((SpecialStaticOffset *) &(x))->fields.f)
530 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
532 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
534 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
535 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
537 return ((char *) thread->static_data [idx]) + off;
541 get_context_static_data (MonoAppContext *ctx, guint32 offset)
543 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
545 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
546 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
548 return ((char *) ctx->static_data [idx]) + off;
552 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
554 static MonoClassField *current_thread_field = NULL;
558 if (!current_thread_field) {
559 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
560 g_assert (current_thread_field);
563 mono_class_vtable (domain, mono_defaults.thread_class);
564 mono_domain_lock (domain);
565 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
566 mono_domain_unlock (domain);
569 return (MonoThread **)get_thread_static_data (thread, offset);
573 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
575 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
577 g_assert (current->obj.vtable->domain == domain);
579 g_assert (!*current_thread_ptr);
580 *current_thread_ptr = current;
584 create_thread_object (MonoDomain *domain, MonoError *error)
586 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
587 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
592 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
596 thread = create_thread_object (domain, error);
597 if (!mono_error_ok (error))
600 MONO_OBJECT_SETREF (thread, internal_thread, internal);
605 static MonoInternalThread*
606 create_internal_thread (MonoError *error)
608 MonoInternalThread *thread;
611 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
612 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
613 if (!mono_error_ok (error))
616 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
617 mono_coop_mutex_init_recursive (thread->synch_cs);
619 thread->apartment_state = ThreadApartmentState_Unknown;
620 thread->managed_id = get_next_managed_thread_id ();
621 if (mono_gc_is_moving ()) {
622 thread->thread_pinning_ref = thread;
623 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
630 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate, MonoError *error)
632 MonoDomain *domain = mono_get_root_domain ();
634 mono_error_init (error);
635 if (!candidate || candidate->obj.vtable->domain != domain) {
636 candidate = new_thread_with_internal (domain, thread, error);
637 return_val_if_nok (error, FALSE);
639 set_current_thread_for_domain (domain, thread, candidate);
640 g_assert (!thread->root_domain_thread);
641 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
645 static guint32 WINAPI start_wrapper_internal(void *data)
648 MonoThreadInfo *info;
649 StartInfo *start_info = (StartInfo *)data;
650 guint32 (*start_func)(void *);
654 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
657 MonoInternalThread *internal = start_info->obj->internal_thread;
658 MonoObject *start_delegate = start_info->delegate;
659 MonoDomain *domain = start_info->obj->obj.vtable->domain;
661 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
663 /* We can be sure start_info->obj->tid and
664 * start_info->obj->handle have been set, because the thread
665 * was created suspended, and these values were set before the
669 info = mono_thread_info_current ();
671 internal->thread_info = info;
672 internal->small_id = info->small_id;
676 SET_CURRENT_OBJECT (internal);
678 /* Every thread references the appdomain which created it */
679 mono_thread_push_appdomain_ref (domain);
681 if (!mono_domain_set (domain, FALSE)) {
682 /* No point in raising an appdomain_unloaded exception here */
683 /* FIXME: Cleanup here */
684 mono_thread_pop_appdomain_ref ();
688 start_func = start_info->func;
689 start_arg = start_info->obj->start_obj;
691 start_arg = start_info->start_arg;
693 /* We have to do this here because mono_thread_new_init()
694 requires that root_domain_thread is set up. */
695 thread_adjust_static_data (internal);
696 init_root_domain_thread (internal, start_info->obj, &error);
697 mono_error_raise_exception (&error); /* FIXME don't raise here */
699 /* This MUST be called before any managed code can be
700 * executed, as it calls the callback function that (for the
701 * jit) sets the lmf marker.
703 mono_thread_new_init (tid, &tid, start_func);
704 internal->stack_ptr = &tid;
705 if (domain != mono_get_root_domain ())
706 set_current_thread_for_domain (domain, internal, start_info->obj);
708 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
710 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
712 /* On 2.0 profile (and higher), set explicitly since state might have been
714 if (internal->apartment_state == ThreadApartmentState_Unknown)
715 internal->apartment_state = ThreadApartmentState_MTA;
717 mono_thread_init_apartment_state ();
719 if(internal->start_notify!=NULL) {
720 /* Let the thread that called Start() know we're
723 ReleaseSemaphore (internal->start_notify, 1, NULL);
727 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
731 * Call this after calling start_notify, since the profiler callback might want
732 * to lock the thread, and the lock is held by thread_start () which waits for
735 mono_profiler_thread_start (tid);
737 /* if the name was set before starting, we didn't invoke the profiler callback */
738 if (internal->name) {
739 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
740 mono_profiler_thread_name (internal->tid, tname);
741 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
745 /* start_func is set only for unmanaged start functions */
747 start_func (start_arg);
750 g_assert (start_delegate != NULL);
751 args [0] = start_arg;
752 /* we may want to handle the exception here. See comment below on unhandled exceptions */
753 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
754 mono_error_raise_exception (&error); /* FIXME don't raise here */
757 /* If the thread calls ExitThread at all, this remaining code
758 * will not be executed, but the main thread will eventually
759 * call thread_cleanup() on this thread's behalf.
762 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
764 /* Do any cleanup needed for apartment state. This
765 * cannot be done in thread_cleanup since thread_cleanup could be
766 * called for a thread other than the current thread.
767 * mono_thread_cleanup_apartment_state cleans up apartment
768 * for the current thead */
769 mono_thread_cleanup_apartment_state ();
771 thread_cleanup (internal);
775 /* Remove the reference to the thread object in the TLS data,
776 * so the thread object can be finalized. This won't be
777 * reached if the thread threw an uncaught exception, so those
778 * thread handles will stay referenced :-( (This is due to
779 * missing support for scanning thread-specific data in the
780 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
783 SET_CURRENT_OBJECT (NULL);
788 static guint32 WINAPI start_wrapper(void *data)
792 /* Avoid scanning the frames above this frame during a GC */
793 mono_gc_set_stack_end ((void*)&dummy);
795 return start_wrapper_internal (data);
801 * Common thread creation code.
802 * LOCKING: Acquires the threads lock.
805 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
808 HANDLE thread_handle;
809 MonoNativeThreadId tid;
810 guint32 create_flags;
813 * Join joinable threads to prevent running out of threads since the finalizer
814 * thread might be blocked/backlogged.
816 mono_threads_join_threads ();
818 mono_error_init (error);
820 mono_threads_lock ();
823 mono_threads_unlock ();
826 if (threads_starting_up == NULL) {
827 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
828 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
830 mono_g_hash_table_insert (threads_starting_up, thread, thread);
831 mono_threads_unlock ();
833 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
834 if (!internal->start_notify) {
835 mono_threads_lock ();
836 mono_g_hash_table_remove (threads_starting_up, thread);
837 mono_threads_unlock ();
838 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
844 stack_size = default_stacksize_for_thread (internal);
846 /* Create suspended, so we can do some housekeeping before the thread
849 create_flags = CREATE_SUSPENDED;
851 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
852 stack_size, create_flags, &tid);
854 if (thread_handle == NULL) {
855 /* The thread couldn't be created, so set an exception */
856 mono_threads_lock ();
857 mono_g_hash_table_remove (threads_starting_up, thread);
858 mono_threads_unlock ();
860 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
863 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
865 internal->handle = thread_handle;
866 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
868 internal->threadpool_thread = threadpool_thread;
869 if (threadpool_thread)
870 mono_thread_set_state (internal, ThreadState_Background);
872 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
874 /* Only store the handle when the thread is about to be
875 * launched, to avoid the main thread deadlocking while trying
876 * to clean up a thread that will never be signalled.
878 if (!handle_store (thread, FALSE))
881 mono_thread_info_resume (tid);
883 if (internal->start_notify) {
885 * Wait for the thread to set up its TLS data etc, so
886 * theres no potential race condition if someone tries
887 * to look up the data believing the thread has
890 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));
893 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
896 CloseHandle (internal->start_notify);
897 internal->start_notify = NULL;
900 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));
905 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
907 if (mono_thread_start_cb) {
908 mono_thread_start_cb (tid, stack_start, func);
912 void mono_threads_set_default_stacksize (guint32 stacksize)
914 default_stacksize = stacksize;
917 guint32 mono_threads_get_default_stacksize (void)
919 return default_stacksize;
923 * mono_thread_create_internal:
925 * ARG should not be a GC reference.
928 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
931 MonoInternalThread *internal;
932 StartInfo *start_info;
935 mono_error_init (error);
937 thread = create_thread_object (domain, error);
938 return_val_if_nok (error, NULL);
940 internal = create_internal_thread (error);
941 return_val_if_nok (error, NULL);
943 MONO_OBJECT_SETREF (thread, internal_thread, internal);
945 start_info = g_new0 (StartInfo, 1);
946 start_info->func = (guint32 (*)(void *))func;
947 start_info->obj = thread;
948 start_info->start_arg = arg;
950 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, error);
951 return_val_if_nok (error, NULL);
953 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
954 #ifndef MONO_CROSS_COMPILE
955 if (mono_check_corlib_version () == NULL)
956 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
963 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
966 if (!mono_thread_create_checked (domain, func, arg, &error))
967 mono_error_cleanup (&error);
971 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
973 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
977 mono_thread_attach (MonoDomain *domain)
980 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
981 mono_error_raise_exception (&error);
987 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
989 MonoThreadInfo *info;
990 MonoInternalThread *thread;
991 MonoThread *current_thread;
992 HANDLE thread_handle;
993 MonoNativeThreadId tid;
995 mono_error_init (error);
997 if ((thread = mono_thread_internal_current ())) {
998 if (domain != mono_domain_get ())
999 mono_domain_set (domain, TRUE);
1000 /* Already attached */
1001 return mono_thread_current ();
1004 if (!mono_gc_register_thread (&domain)) {
1005 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 ());
1008 thread = create_internal_thread (error);
1009 if (!mono_error_ok (error))
1012 thread_handle = mono_thread_info_open_handle ();
1013 g_assert (thread_handle);
1015 tid=mono_native_thread_id_get ();
1017 thread->handle = thread_handle;
1018 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
1019 thread->stack_ptr = &tid;
1021 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1023 info = mono_thread_info_current ();
1025 thread->thread_info = info;
1026 thread->small_id = info->small_id;
1028 current_thread = new_thread_with_internal (domain, thread, error);
1029 if (!mono_error_ok (error))
1032 if (!handle_store (current_thread, force_attach)) {
1033 /* Mono is shutting down, so just wait for the end */
1035 mono_thread_info_sleep (10000, NULL);
1038 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1040 SET_CURRENT_OBJECT (thread);
1041 mono_domain_set (domain, TRUE);
1043 thread_adjust_static_data (thread);
1045 init_root_domain_thread (thread, current_thread, error);
1046 return_val_if_nok (error, NULL);
1048 if (domain != mono_get_root_domain ())
1049 set_current_thread_for_domain (domain, thread, current_thread);
1052 if (mono_thread_attach_cb) {
1056 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1059 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1061 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1064 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1065 if (!info->tools_thread)
1066 // FIXME: Need a separate callback
1067 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1069 return current_thread;
1073 mono_thread_detach_internal (MonoInternalThread *thread)
1075 g_return_if_fail (thread != NULL);
1077 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1079 thread_cleanup (thread);
1081 SET_CURRENT_OBJECT (NULL);
1082 mono_domain_unset ();
1084 /* Don't need to CloseHandle this thread, even though we took a
1085 * reference in mono_thread_attach (), because the GC will do it
1086 * when the Thread object is finalised.
1091 mono_thread_detach (MonoThread *thread)
1094 mono_thread_detach_internal (thread->internal_thread);
1098 * mono_thread_detach_if_exiting:
1100 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1101 * This should be used at the end of embedding code which calls into managed code, and which
1102 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1105 mono_thread_detach_if_exiting (void)
1107 if (mono_thread_info_is_exiting ()) {
1108 MonoInternalThread *thread;
1110 thread = mono_thread_internal_current ();
1112 mono_thread_detach_internal (thread);
1113 mono_thread_info_detach ();
1121 MonoInternalThread *thread = mono_thread_internal_current ();
1123 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1125 thread_cleanup (thread);
1126 SET_CURRENT_OBJECT (NULL);
1127 mono_domain_unset ();
1129 /* we could add a callback here for embedders to use. */
1130 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1131 exit (mono_environment_exitcode_get ());
1132 mono_thread_info_exit ();
1136 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1139 MonoInternalThread *internal;
1141 internal = create_internal_thread (&error);
1142 if (mono_error_set_pending_exception (&error))
1145 internal->state = ThreadState_Unstarted;
1147 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1151 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1155 StartInfo *start_info;
1156 MonoInternalThread *internal;
1159 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1161 if (!this_obj->internal_thread)
1162 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1163 internal = this_obj->internal_thread;
1165 LOCK_THREAD (internal);
1167 if ((internal->state & ThreadState_Unstarted) == 0) {
1168 UNLOCK_THREAD (internal);
1169 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1173 if ((internal->state & ThreadState_Aborted) != 0) {
1174 UNLOCK_THREAD (internal);
1177 /* This is freed in start_wrapper */
1178 start_info = g_new0 (StartInfo, 1);
1179 start_info->func = NULL;
1180 start_info->start_arg = NULL;
1181 start_info->delegate = start;
1182 start_info->obj = this_obj;
1183 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1185 res = create_thread (this_obj, internal, start_info, FALSE, 0, &error);
1187 mono_error_cleanup (&error);
1188 UNLOCK_THREAD (internal);
1192 internal->state &= ~ThreadState_Unstarted;
1194 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1196 UNLOCK_THREAD (internal);
1197 return internal->handle;
1201 * This is called from the finalizer of the internal thread object.
1204 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1206 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1209 * Since threads keep a reference to their thread object while running, by the time this function is called,
1210 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1211 * when thread_cleanup () can be called after this.
1214 CloseHandle (thread);
1216 if (this_obj->synch_cs) {
1217 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1218 this_obj->synch_cs = NULL;
1219 mono_coop_mutex_destroy (synch_cs);
1223 if (this_obj->name) {
1224 void *name = this_obj->name;
1225 this_obj->name = NULL;
1231 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1234 MonoInternalThread *thread = mono_thread_internal_current ();
1236 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1238 mono_thread_current_check_pending_interrupt ();
1241 gboolean alerted = FALSE;
1243 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1245 res = mono_thread_info_sleep (ms, &alerted);
1247 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1250 MonoException* exc = mono_thread_execute_interruption ();
1252 mono_raise_exception (exc);
1264 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1269 ves_icall_System_Threading_Thread_GetDomainID (void)
1271 return mono_domain_get()->domain_id;
1275 ves_icall_System_Threading_Thread_Yield (void)
1277 return mono_thread_info_yield ();
1281 * mono_thread_get_name:
1283 * Return the name of the thread. NAME_LEN is set to the length of the name.
1284 * Return NULL if the thread has no name. The returned memory is owned by the
1288 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1292 LOCK_THREAD (this_obj);
1294 if (!this_obj->name) {
1298 *name_len = this_obj->name_len;
1299 res = g_new (gunichar2, this_obj->name_len);
1300 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1303 UNLOCK_THREAD (this_obj);
1309 * mono_thread_get_name_utf8:
1311 * Return the name of the thread in UTF-8.
1312 * Return NULL if the thread has no name.
1313 * The returned memory is owned by the caller.
1316 mono_thread_get_name_utf8 (MonoThread *thread)
1321 MonoInternalThread *internal = thread->internal_thread;
1322 if (internal == NULL)
1325 LOCK_THREAD (internal);
1327 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1329 UNLOCK_THREAD (internal);
1335 * mono_thread_get_managed_id:
1337 * Return the Thread.ManagedThreadId value of `thread`.
1338 * Returns -1 if `thread` is NULL.
1341 mono_thread_get_managed_id (MonoThread *thread)
1346 MonoInternalThread *internal = thread->internal_thread;
1347 if (internal == NULL)
1350 int32_t id = internal->managed_id;
1356 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1361 mono_error_init (&error);
1363 LOCK_THREAD (this_obj);
1365 if (!this_obj->name)
1368 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1370 UNLOCK_THREAD (this_obj);
1372 if (mono_error_set_pending_exception (&error))
1379 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1381 LOCK_THREAD (this_obj);
1383 mono_error_init (error);
1385 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1386 UNLOCK_THREAD (this_obj);
1388 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1391 if (this_obj->name) {
1392 g_free (this_obj->name);
1393 this_obj->name_len = 0;
1396 this_obj->name = g_new (gunichar2, mono_string_length (name));
1397 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1398 this_obj->name_len = mono_string_length (name);
1401 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1404 this_obj->name = NULL;
1407 UNLOCK_THREAD (this_obj);
1409 if (this_obj->name && this_obj->tid) {
1410 char *tname = mono_string_to_utf8 (name);
1411 mono_profiler_thread_name (this_obj->tid, tname);
1412 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1418 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1421 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1422 mono_error_set_pending_exception (&error);
1426 * ves_icall_System_Threading_Thread_GetPriority_internal:
1427 * @param this_obj: The MonoInternalThread on which to operate.
1429 * Gets the priority of the given thread.
1430 * @return: The priority of the given thread.
1433 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1436 MonoInternalThread *internal = this_obj->internal_thread;
1438 LOCK_THREAD (internal);
1439 priority = GetThreadPriority (internal->handle) + 2;
1440 UNLOCK_THREAD (internal);
1445 * ves_icall_System_Threading_Thread_SetPriority_internal:
1446 * @param this_obj: The MonoInternalThread on which to operate.
1447 * @param priority: The priority to set.
1449 * Sets the priority of the given thread.
1452 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1454 MonoInternalThread *internal = this_obj->internal_thread;
1456 LOCK_THREAD (internal);
1457 SetThreadPriority (internal->handle, priority - 2);
1458 UNLOCK_THREAD (internal);
1461 /* If the array is already in the requested domain, we just return it,
1462 otherwise we return a copy in that domain. */
1464 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1468 mono_error_init (error);
1472 if (mono_object_domain (arr) == domain)
1475 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1476 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1481 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1484 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1485 mono_error_set_pending_exception (&error);
1490 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1493 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1494 mono_error_set_pending_exception (&error);
1499 mono_thread_current (void)
1502 MonoDomain *domain = mono_domain_get ();
1503 MonoInternalThread *internal = mono_thread_internal_current ();
1504 MonoThread **current_thread_ptr;
1506 g_assert (internal);
1507 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1509 if (!*current_thread_ptr) {
1510 g_assert (domain != mono_get_root_domain ());
1511 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1512 mono_error_raise_exception (&error); /* FIXME don't raise here */
1514 return *current_thread_ptr;
1517 /* Return the thread object belonging to INTERNAL in the current domain */
1519 mono_thread_current_for_thread (MonoInternalThread *internal)
1522 MonoDomain *domain = mono_domain_get ();
1523 MonoThread **current_thread_ptr;
1525 g_assert (internal);
1526 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1528 if (!*current_thread_ptr) {
1529 g_assert (domain != mono_get_root_domain ());
1530 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1531 mono_error_raise_exception (&error); /* FIXME don't raise here */
1533 return *current_thread_ptr;
1537 mono_thread_internal_current (void)
1539 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1540 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1545 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1547 MonoInternalThread *thread = this_obj->internal_thread;
1548 HANDLE handle = thread->handle;
1549 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1552 mono_thread_current_check_pending_interrupt ();
1554 LOCK_THREAD (thread);
1556 if ((thread->state & ThreadState_Unstarted) != 0) {
1557 UNLOCK_THREAD (thread);
1559 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1563 UNLOCK_THREAD (thread);
1568 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1570 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1573 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1576 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1578 if(ret==WAIT_OBJECT_0) {
1579 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1584 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1590 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1598 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1602 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1604 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1607 if (ret != WAIT_IO_COMPLETION)
1610 exc = mono_thread_execute_interruption ();
1612 mono_raise_exception (exc);
1617 /* Re-calculate ms according to the time passed */
1618 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1619 if (diff_ms >= ms) {
1623 wait = ms - diff_ms;
1629 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1635 MonoObject *waitHandle;
1636 MonoInternalThread *thread = mono_thread_internal_current ();
1638 /* Do this WaitSleepJoin check before creating objects */
1639 mono_thread_current_check_pending_interrupt ();
1641 /* We fail in managed if the array has more than 64 elements */
1642 numhandles = (guint32)mono_array_length(mono_handles);
1643 handles = g_new0(HANDLE, numhandles);
1645 for(i = 0; i < numhandles; i++) {
1646 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1647 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1654 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1656 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1658 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1662 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1663 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1666 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1668 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1669 uintptr_t numhandles;
1672 MonoObject *waitHandle;
1673 MonoInternalThread *thread = mono_thread_internal_current ();
1675 /* Do this WaitSleepJoin check before creating objects */
1676 mono_thread_current_check_pending_interrupt ();
1678 numhandles = mono_array_length(mono_handles);
1679 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1682 for(i = 0; i < numhandles; i++) {
1683 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1684 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1691 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1693 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1695 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1697 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1700 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1702 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1703 return ret - WAIT_OBJECT_0;
1705 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1706 return ret - WAIT_ABANDONED_0;
1709 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1710 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1714 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1717 MonoInternalThread *thread = mono_thread_internal_current ();
1719 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1725 mono_thread_current_check_pending_interrupt ();
1727 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1729 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1731 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1733 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1734 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1738 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1741 MonoInternalThread *thread = mono_thread_internal_current ();
1746 mono_thread_current_check_pending_interrupt ();
1748 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1751 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1754 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1756 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1757 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1760 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1767 mutex = CreateMutex (NULL, owned, NULL);
1769 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1771 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1779 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1780 return(ReleaseMutex (handle));
1783 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1789 *error = ERROR_SUCCESS;
1791 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1793 *error = GetLastError ();
1800 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1807 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1809 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1810 mono_string_chars (name));
1812 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1820 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1824 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1829 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1833 *error = ERROR_SUCCESS;
1835 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1837 *error = GetLastError ();
1843 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1850 event = CreateEvent (NULL, manual, initial, NULL);
1852 event = CreateEvent (NULL, manual, initial,
1853 mono_string_chars (name));
1855 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1863 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1864 return (SetEvent(handle));
1867 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1868 return (ResetEvent(handle));
1872 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1873 CloseHandle (handle);
1876 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1882 *error = ERROR_SUCCESS;
1884 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1886 *error = GetLastError ();
1892 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1894 return InterlockedIncrement (location);
1897 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1899 #if SIZEOF_VOID_P == 4
1900 if (G_UNLIKELY ((size_t)location & 0x7)) {
1902 mono_interlocked_lock ();
1905 mono_interlocked_unlock ();
1909 return InterlockedIncrement64 (location);
1912 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1914 return InterlockedDecrement(location);
1917 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1919 #if SIZEOF_VOID_P == 4
1920 if (G_UNLIKELY ((size_t)location & 0x7)) {
1922 mono_interlocked_lock ();
1925 mono_interlocked_unlock ();
1929 return InterlockedDecrement64 (location);
1932 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1934 return InterlockedExchange(location, value);
1937 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1940 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1941 mono_gc_wbarrier_generic_nostore (location);
1945 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1947 return InterlockedExchangePointer(location, value);
1950 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1952 IntFloatUnion val, ret;
1955 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1961 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1963 #if SIZEOF_VOID_P == 4
1964 if (G_UNLIKELY ((size_t)location & 0x7)) {
1966 mono_interlocked_lock ();
1969 mono_interlocked_unlock ();
1973 return InterlockedExchange64 (location, value);
1977 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1979 LongDoubleUnion val, ret;
1982 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1987 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1989 return InterlockedCompareExchange(location, value, comparand);
1992 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1994 gint32 r = InterlockedCompareExchange(location, value, comparand);
1995 *success = r == comparand;
1999 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2002 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2003 mono_gc_wbarrier_generic_nostore (location);
2007 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2009 return InterlockedCompareExchangePointer(location, value, comparand);
2012 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2014 IntFloatUnion val, ret, cmp;
2017 cmp.fval = comparand;
2018 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2024 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2026 #if SIZEOF_VOID_P == 8
2027 LongDoubleUnion val, comp, ret;
2030 comp.fval = comparand;
2031 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2037 mono_interlocked_lock ();
2039 if (old == comparand)
2041 mono_interlocked_unlock ();
2048 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2050 #if SIZEOF_VOID_P == 4
2051 if (G_UNLIKELY ((size_t)location & 0x7)) {
2053 mono_interlocked_lock ();
2055 if (old == comparand)
2057 mono_interlocked_unlock ();
2061 return InterlockedCompareExchange64 (location, value, comparand);
2065 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2068 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2069 mono_gc_wbarrier_generic_nostore (location);
2074 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2077 MONO_CHECK_NULL (location, NULL);
2078 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2079 mono_gc_wbarrier_generic_nostore (location);
2084 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2086 return InterlockedAdd (location, value);
2090 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2092 #if SIZEOF_VOID_P == 4
2093 if (G_UNLIKELY ((size_t)location & 0x7)) {
2095 mono_interlocked_lock ();
2098 mono_interlocked_unlock ();
2102 return InterlockedAdd64 (location, value);
2106 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2108 #if SIZEOF_VOID_P == 4
2109 if (G_UNLIKELY ((size_t)location & 0x7)) {
2111 mono_interlocked_lock ();
2113 mono_interlocked_unlock ();
2117 return InterlockedRead64 (location);
2121 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2123 mono_memory_barrier ();
2127 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2129 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2131 if (state & ThreadState_Background) {
2132 /* If the thread changes the background mode, the main thread has to
2133 * be notified, since it has to rebuild the list of threads to
2136 SetEvent (background_change_event);
2141 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2143 mono_thread_set_state (this_obj, (MonoThreadState)state);
2145 if (state & ThreadState_Background) {
2146 /* If the thread changes the background mode, the main thread has to
2147 * be notified, since it has to rebuild the list of threads to
2150 SetEvent (background_change_event);
2155 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2159 LOCK_THREAD (this_obj);
2161 state = this_obj->state;
2163 UNLOCK_THREAD (this_obj);
2168 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2170 MonoInternalThread *current;
2172 MonoInternalThread *thread = this_obj->internal_thread;
2174 LOCK_THREAD (thread);
2176 current = mono_thread_internal_current ();
2178 thread->thread_interrupt_requested = TRUE;
2179 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2181 UNLOCK_THREAD (thread);
2184 async_abort_internal (thread, FALSE);
2188 void mono_thread_current_check_pending_interrupt ()
2190 MonoInternalThread *thread = mono_thread_internal_current ();
2191 gboolean throw_ = FALSE;
2193 LOCK_THREAD (thread);
2195 if (thread->thread_interrupt_requested) {
2197 thread->thread_interrupt_requested = FALSE;
2200 UNLOCK_THREAD (thread);
2203 mono_raise_exception (mono_get_exception_thread_interrupted ());
2208 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2210 LOCK_THREAD (thread);
2212 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2213 (thread->state & ThreadState_StopRequested) != 0 ||
2214 (thread->state & ThreadState_Stopped) != 0)
2216 UNLOCK_THREAD (thread);
2220 if ((thread->state & ThreadState_Unstarted) != 0) {
2221 thread->state |= ThreadState_Aborted;
2222 UNLOCK_THREAD (thread);
2226 thread->state |= ThreadState_AbortRequested;
2227 if (thread->abort_state_handle)
2228 mono_gchandle_free (thread->abort_state_handle);
2230 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2231 g_assert (thread->abort_state_handle);
2233 thread->abort_state_handle = 0;
2235 thread->abort_exc = NULL;
2237 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));
2239 /* During shutdown, we can't wait for other threads */
2241 /* Make sure the thread is awake */
2242 mono_thread_resume (thread);
2244 UNLOCK_THREAD (thread);
2246 if (thread == mono_thread_internal_current ())
2247 self_abort_internal ();
2249 async_abort_internal (thread, TRUE);
2253 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2255 MonoInternalThread *thread = mono_thread_internal_current ();
2256 gboolean was_aborting;
2258 LOCK_THREAD (thread);
2259 was_aborting = thread->state & ThreadState_AbortRequested;
2260 thread->state &= ~ThreadState_AbortRequested;
2261 UNLOCK_THREAD (thread);
2263 if (!was_aborting) {
2264 const char *msg = "Unable to reset abort because no abort was requested";
2265 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2268 thread->abort_exc = NULL;
2269 if (thread->abort_state_handle) {
2270 mono_gchandle_free (thread->abort_state_handle);
2271 /* This is actually not necessary - the handle
2272 only counts if the exception is set */
2273 thread->abort_state_handle = 0;
2278 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2280 LOCK_THREAD (thread);
2282 thread->state &= ~ThreadState_AbortRequested;
2284 if (thread->abort_exc) {
2285 thread->abort_exc = NULL;
2286 if (thread->abort_state_handle) {
2287 mono_gchandle_free (thread->abort_state_handle);
2288 /* This is actually not necessary - the handle
2289 only counts if the exception is set */
2290 thread->abort_state_handle = 0;
2294 UNLOCK_THREAD (thread);
2298 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2301 MonoInternalThread *thread = this_obj->internal_thread;
2302 MonoObject *state, *deserialized = NULL;
2305 if (!thread->abort_state_handle)
2308 state = mono_gchandle_get_target (thread->abort_state_handle);
2311 domain = mono_domain_get ();
2312 if (mono_object_domain (state) == domain)
2315 deserialized = mono_object_xdomain_representation (state, domain, &error);
2317 if (!deserialized) {
2318 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2319 if (!is_ok (&error)) {
2320 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2321 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2323 mono_set_pending_exception (invalid_op_exc);
2327 return deserialized;
2331 mono_thread_suspend (MonoInternalThread *thread)
2333 LOCK_THREAD (thread);
2335 if ((thread->state & ThreadState_Unstarted) != 0 ||
2336 (thread->state & ThreadState_Aborted) != 0 ||
2337 (thread->state & ThreadState_Stopped) != 0)
2339 UNLOCK_THREAD (thread);
2343 if ((thread->state & ThreadState_Suspended) != 0 ||
2344 (thread->state & ThreadState_SuspendRequested) != 0 ||
2345 (thread->state & ThreadState_StopRequested) != 0)
2347 UNLOCK_THREAD (thread);
2351 thread->state |= ThreadState_SuspendRequested;
2353 if (thread == mono_thread_internal_current ()) {
2354 /* calls UNLOCK_THREAD (thread) */
2355 self_suspend_internal ();
2357 /* calls UNLOCK_THREAD (thread) */
2358 async_suspend_internal (thread, FALSE);
2365 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2367 if (!mono_thread_suspend (this_obj->internal_thread)) {
2368 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2373 /* LOCKING: LOCK_THREAD(thread) must be held */
2375 mono_thread_resume (MonoInternalThread *thread)
2377 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2378 thread->state &= ~ThreadState_SuspendRequested;
2382 if ((thread->state & ThreadState_Suspended) == 0 ||
2383 (thread->state & ThreadState_Unstarted) != 0 ||
2384 (thread->state & ThreadState_Aborted) != 0 ||
2385 (thread->state & ThreadState_Stopped) != 0)
2390 UNLOCK_THREAD (thread);
2392 /* Awake the thread */
2393 if (!mono_thread_info_resume (thread_get_tid (thread)))
2396 LOCK_THREAD (thread);
2398 thread->state &= ~ThreadState_Suspended;
2404 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2406 if (!thread->internal_thread) {
2407 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2409 LOCK_THREAD (thread->internal_thread);
2410 if (!mono_thread_resume (thread->internal_thread))
2411 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2412 UNLOCK_THREAD (thread->internal_thread);
2417 mono_threads_is_critical_method (MonoMethod *method)
2419 switch (method->wrapper_type) {
2420 case MONO_WRAPPER_RUNTIME_INVOKE:
2421 case MONO_WRAPPER_XDOMAIN_INVOKE:
2422 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2429 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2434 if (mono_threads_is_critical_method (m)) {
2435 *((gboolean*)data) = TRUE;
2442 is_running_protected_wrapper (void)
2444 gboolean found = FALSE;
2445 mono_stack_walk (find_wrapper, &found);
2449 void mono_thread_internal_stop (MonoInternalThread *thread)
2451 LOCK_THREAD (thread);
2453 if ((thread->state & ThreadState_StopRequested) != 0 ||
2454 (thread->state & ThreadState_Stopped) != 0)
2456 UNLOCK_THREAD (thread);
2460 /* Make sure the thread is awake */
2461 mono_thread_resume (thread);
2463 thread->state |= ThreadState_StopRequested;
2464 thread->state &= ~ThreadState_AbortRequested;
2466 UNLOCK_THREAD (thread);
2468 if (thread == mono_thread_internal_current ())
2469 self_abort_internal ();
2471 async_abort_internal (thread, TRUE);
2474 void mono_thread_stop (MonoThread *thread)
2476 mono_thread_internal_stop (thread->internal_thread);
2480 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2482 gint8 tmp = *(volatile gint8 *)ptr;
2483 mono_memory_barrier ();
2488 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2490 gint16 tmp = *(volatile gint16 *)ptr;
2491 mono_memory_barrier ();
2496 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2498 gint32 tmp = *(volatile gint32 *)ptr;
2499 mono_memory_barrier ();
2504 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2506 gint64 tmp = *(volatile gint64 *)ptr;
2507 mono_memory_barrier ();
2512 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2514 volatile void *tmp = *(volatile void **)ptr;
2515 mono_memory_barrier ();
2516 return (void *) tmp;
2520 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2522 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2523 mono_memory_barrier ();
2524 return (MonoObject *) tmp;
2528 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2530 double tmp = *(volatile double *)ptr;
2531 mono_memory_barrier ();
2536 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2538 float tmp = *(volatile float *)ptr;
2539 mono_memory_barrier ();
2544 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2546 return InterlockedRead8 ((volatile gint8 *)ptr);
2550 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2552 return InterlockedRead16 ((volatile gint16 *)ptr);
2556 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2558 return InterlockedRead ((volatile gint32 *)ptr);
2562 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2564 #if SIZEOF_VOID_P == 4
2565 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2567 mono_interlocked_lock ();
2568 val = *(gint64*)ptr;
2569 mono_interlocked_unlock ();
2573 return InterlockedRead64 ((volatile gint64 *)ptr);
2577 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2579 return InterlockedReadPointer ((volatile gpointer *)ptr);
2583 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2587 #if SIZEOF_VOID_P == 4
2588 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2590 mono_interlocked_lock ();
2591 val = *(double*)ptr;
2592 mono_interlocked_unlock ();
2597 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2603 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2607 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2613 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2615 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2619 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2621 mono_memory_barrier ();
2622 *(volatile gint8 *)ptr = value;
2626 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2628 mono_memory_barrier ();
2629 *(volatile gint16 *)ptr = value;
2633 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2635 mono_memory_barrier ();
2636 *(volatile gint32 *)ptr = value;
2640 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2642 mono_memory_barrier ();
2643 *(volatile gint64 *)ptr = value;
2647 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2649 mono_memory_barrier ();
2650 *(volatile void **)ptr = value;
2654 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2656 mono_memory_barrier ();
2657 mono_gc_wbarrier_generic_store (ptr, value);
2661 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2663 mono_memory_barrier ();
2664 *(volatile double *)ptr = value;
2668 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2670 mono_memory_barrier ();
2671 *(volatile float *)ptr = value;
2675 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2677 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2681 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2683 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2687 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2689 InterlockedWrite ((volatile gint32 *)ptr, value);
2693 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2695 #if SIZEOF_VOID_P == 4
2696 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2697 mono_interlocked_lock ();
2698 *(gint64*)ptr = value;
2699 mono_interlocked_unlock ();
2704 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2708 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2710 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2714 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2718 #if SIZEOF_VOID_P == 4
2719 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2720 mono_interlocked_lock ();
2721 *(double*)ptr = value;
2722 mono_interlocked_unlock ();
2729 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2733 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2739 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2743 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2745 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2749 free_context (void *user_data)
2751 ContextStaticData *data = user_data;
2753 mono_threads_lock ();
2756 * There is no guarantee that, by the point this reference queue callback
2757 * has been invoked, the GC handle associated with the object will fail to
2758 * resolve as one might expect. So if we don't free and remove the GC
2759 * handle here, free_context_static_data_helper () could end up resolving
2760 * a GC handle to an actually-dead context which would contain a pointer
2761 * to an already-freed static data segment, resulting in a crash when
2764 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2766 mono_threads_unlock ();
2768 mono_gchandle_free (data->gc_handle);
2769 mono_free_static_data (data->static_data);
2774 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2776 mono_threads_lock ();
2778 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2781 contexts = g_hash_table_new (NULL, NULL);
2784 context_queue = mono_gc_reference_queue_new (free_context);
2786 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2787 g_hash_table_insert (contexts, gch, gch);
2790 * We use this intermediate structure to contain a duplicate pointer to
2791 * the static data because we can't rely on being able to resolve the GC
2792 * handle in the reference queue callback.
2794 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2795 data->gc_handle = GPOINTER_TO_UINT (gch);
2798 context_adjust_static_data (ctx);
2799 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2801 mono_threads_unlock ();
2803 mono_profiler_context_loaded (ctx);
2807 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2810 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2811 * cleanup in exceptional circumstances, we don't actually do any
2812 * cleanup work here. We instead do this via a reference queue.
2815 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2817 mono_profiler_context_unloaded (ctx);
2821 mono_thread_init_tls (void)
2823 MONO_FAST_TLS_INIT (tls_current_object);
2824 mono_native_tls_alloc (¤t_object_key, NULL);
2827 void mono_thread_init (MonoThreadStartCB start_cb,
2828 MonoThreadAttachCB attach_cb)
2830 mono_coop_mutex_init_recursive (&threads_mutex);
2832 mono_os_mutex_init_recursive(&interlocked_mutex);
2833 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2835 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2836 g_assert(background_change_event != NULL);
2838 mono_init_static_data_info (&thread_static_info);
2839 mono_init_static_data_info (&context_static_info);
2841 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2843 mono_thread_start_cb = start_cb;
2844 mono_thread_attach_cb = attach_cb;
2846 /* Get a pseudo handle to the current process. This is just a
2847 * kludge so that wapi can build a process handle if needed.
2848 * As a pseudo handle is returned, we don't need to clean
2851 GetCurrentProcess ();
2854 void mono_thread_cleanup (void)
2856 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2857 MonoThreadInfo *info;
2859 /* The main thread must abandon any held mutexes (particularly
2860 * important for named mutexes as they are shared across
2861 * processes, see bug 74680.) This will happen when the
2862 * thread exits, but if it's not running in a subthread it
2863 * won't exit in time.
2865 info = mono_thread_info_current ();
2866 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2870 /* This stuff needs more testing, it seems one of these
2871 * critical sections can be locked when mono_thread_cleanup is
2874 mono_coop_mutex_destroy (&threads_mutex);
2875 mono_os_mutex_destroy (&interlocked_mutex);
2876 mono_os_mutex_destroy (&delayed_free_table_mutex);
2877 mono_os_mutex_destroy (&small_id_mutex);
2878 CloseHandle (background_change_event);
2881 mono_native_tls_free (current_object_key);
2885 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2887 mono_thread_cleanup_fn = func;
2891 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2893 thread->internal_thread->manage_callback = func;
2897 static void print_tids (gpointer key, gpointer value, gpointer user)
2899 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2900 * sizeof(uint) and a cast to uint would overflow
2902 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2903 * print this as a pointer.
2905 g_message ("Waiting for: %p", key);
2910 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2911 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2915 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2919 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2922 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2925 if(ret==WAIT_FAILED) {
2926 /* See the comment in build_wait_tids() */
2927 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2931 for(i=0; i<wait->num; i++)
2932 CloseHandle (wait->handles[i]);
2934 if (ret == WAIT_TIMEOUT)
2937 for(i=0; i<wait->num; i++) {
2938 gsize tid = wait->threads[i]->tid;
2941 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2942 * it can still run io-layer etc. code. So wait for it to really exit.
2943 * FIXME: This won't join threads which are not in the joinable_hash yet.
2945 mono_thread_join ((gpointer)tid);
2947 mono_threads_lock ();
2948 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2949 /* This thread must have been killed, because
2950 * it hasn't cleaned itself up. (It's just
2951 * possible that the thread exited before the
2952 * parent thread had a chance to store the
2953 * handle, and now there is another pointer to
2954 * the already-exited thread stored. In this
2955 * case, we'll just get two
2956 * mono_profiler_thread_end() calls for the
2960 mono_threads_unlock ();
2961 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2962 thread_cleanup (wait->threads[i]);
2964 mono_threads_unlock ();
2969 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2971 guint32 i, ret, count;
2973 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2975 /* Add the thread state change event, so it wakes up if a thread changes
2976 * to background mode.
2979 if (count < MAXIMUM_WAIT_OBJECTS) {
2980 wait->handles [count] = background_change_event;
2985 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2988 if(ret==WAIT_FAILED) {
2989 /* See the comment in build_wait_tids() */
2990 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2994 for(i=0; i<wait->num; i++)
2995 CloseHandle (wait->handles[i]);
2997 if (ret == WAIT_TIMEOUT)
3000 if (ret < wait->num) {
3001 gsize tid = wait->threads[ret]->tid;
3002 mono_threads_lock ();
3003 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3004 /* See comment in wait_for_tids about thread cleanup */
3005 mono_threads_unlock ();
3006 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
3007 thread_cleanup (wait->threads [ret]);
3009 mono_threads_unlock ();
3013 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3015 struct wait_data *wait=(struct wait_data *)user;
3017 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
3019 MonoInternalThread *thread=(MonoInternalThread *)value;
3021 /* Ignore background threads, we abort them later */
3022 /* Do not lock here since it is not needed and the caller holds threads_lock */
3023 if (thread->state & ThreadState_Background) {
3024 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3025 return; /* just leave, ignore */
3028 if (mono_gc_is_finalizer_internal_thread (thread)) {
3029 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3033 if (thread == mono_thread_internal_current ()) {
3034 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3038 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3039 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3043 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3044 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3048 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3049 if (handle == NULL) {
3050 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3054 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3055 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3056 wait->handles[wait->num]=handle;
3057 wait->threads[wait->num]=thread;
3060 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3062 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3067 /* Just ignore the rest, we can't do anything with
3074 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3076 struct wait_data *wait=(struct wait_data *)user;
3077 MonoNativeThreadId self = mono_native_thread_id_get ();
3078 MonoInternalThread *thread = (MonoInternalThread *)value;
3081 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3084 /* The finalizer thread is not a background thread */
3085 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3086 && (thread->state & ThreadState_Background) != 0
3087 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3089 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3093 wait->handles[wait->num] = handle;
3094 wait->threads[wait->num] = thread;
3097 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3098 mono_thread_internal_stop (thread);
3102 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3103 && !mono_gc_is_finalizer_internal_thread (thread);
3107 * mono_threads_set_shutting_down:
3109 * Is called by a thread that wants to shut down Mono. If the runtime is already
3110 * shutting down, the calling thread is suspended/stopped, and this function never
3114 mono_threads_set_shutting_down (void)
3116 MonoInternalThread *current_thread = mono_thread_internal_current ();
3118 mono_threads_lock ();
3120 if (shutting_down) {
3121 mono_threads_unlock ();
3123 /* Make sure we're properly suspended/stopped */
3125 LOCK_THREAD (current_thread);
3127 if ((current_thread->state & ThreadState_SuspendRequested) ||
3128 (current_thread->state & ThreadState_AbortRequested) ||
3129 (current_thread->state & ThreadState_StopRequested)) {
3130 UNLOCK_THREAD (current_thread);
3131 mono_thread_execute_interruption ();
3133 current_thread->state |= ThreadState_Stopped;
3134 UNLOCK_THREAD (current_thread);
3137 /*since we're killing the thread, unset the current domain.*/
3138 mono_domain_unset ();
3140 /* Wake up other threads potentially waiting for us */
3141 mono_thread_info_exit ();
3143 shutting_down = TRUE;
3145 /* Not really a background state change, but this will
3146 * interrupt the main thread if it is waiting for all
3147 * the other threads.
3149 SetEvent (background_change_event);
3151 mono_threads_unlock ();
3155 void mono_thread_manage (void)
3157 struct wait_data wait_data;
3158 struct wait_data *wait = &wait_data;
3160 memset (wait, 0, sizeof (struct wait_data));
3161 /* join each thread that's still running */
3162 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3164 mono_threads_lock ();
3166 THREAD_DEBUG (g_message("%s: No threads", __func__));
3167 mono_threads_unlock ();
3170 mono_threads_unlock ();
3173 mono_threads_lock ();
3174 if (shutting_down) {
3175 /* somebody else is shutting down */
3176 mono_threads_unlock ();
3179 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3180 mono_g_hash_table_foreach (threads, print_tids, NULL));
3182 ResetEvent (background_change_event);
3184 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3185 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3186 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3187 mono_threads_unlock ();
3189 /* Something to wait for */
3190 wait_for_tids_or_state_change (wait, INFINITE);
3192 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3193 } while(wait->num>0);
3195 /* Mono is shutting down, so just wait for the end */
3196 if (!mono_runtime_try_shutdown ()) {
3197 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3198 mono_thread_suspend (mono_thread_internal_current ());
3199 mono_thread_execute_interruption ();
3203 * Remove everything but the finalizer thread and self.
3204 * Also abort all the background threads
3207 mono_threads_lock ();
3210 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3211 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3212 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3214 mono_threads_unlock ();
3216 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3218 /* Something to wait for */
3219 wait_for_tids (wait, INFINITE);
3221 } while (wait->num > 0);
3224 * give the subthreads a chance to really quit (this is mainly needed
3225 * to get correct user and system times from getrusage/wait/time(1)).
3226 * This could be removed if we avoid pthread_detach() and use pthread_join().
3228 mono_thread_info_yield ();
3232 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3234 MonoInternalThread *thread = (MonoInternalThread*)value;
3235 struct wait_data *wait = (struct wait_data*)user_data;
3239 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3241 * This needs no locking.
3243 if ((thread->state & ThreadState_Suspended) != 0 ||
3244 (thread->state & ThreadState_Stopped) != 0)
3247 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3248 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3252 wait->handles [wait->num] = handle;
3253 wait->threads [wait->num] = thread;
3259 * mono_thread_suspend_all_other_threads:
3261 * Suspend all managed threads except the finalizer thread and this thread. It is
3262 * not possible to resume them later.
3264 void mono_thread_suspend_all_other_threads (void)
3266 struct wait_data wait_data;
3267 struct wait_data *wait = &wait_data;
3269 MonoNativeThreadId self = mono_native_thread_id_get ();
3270 guint32 eventidx = 0;
3271 gboolean starting, finished;
3273 memset (wait, 0, sizeof (struct wait_data));
3275 * The other threads could be in an arbitrary state at this point, i.e.
3276 * they could be starting up, shutting down etc. This means that there could be
3277 * threads which are not even in the threads hash table yet.
3281 * First we set a barrier which will be checked by all threads before they
3282 * are added to the threads hash table, and they will exit if the flag is set.
3283 * This ensures that no threads could be added to the hash later.
3284 * We will use shutting_down as the barrier for now.
3286 g_assert (shutting_down);
3289 * We make multiple calls to WaitForMultipleObjects since:
3290 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3291 * - some threads could exit without becoming suspended
3296 * Make a copy of the hashtable since we can't do anything with
3297 * threads while threads_mutex is held.
3300 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3301 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3302 mono_threads_lock ();
3303 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3304 mono_threads_unlock ();
3307 /* Get the suspended events that we'll be waiting for */
3308 for (i = 0; i < wait->num; ++i) {
3309 MonoInternalThread *thread = wait->threads [i];
3311 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3312 || mono_gc_is_finalizer_internal_thread (thread)
3313 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3315 //CloseHandle (wait->handles [i]);
3316 wait->threads [i] = NULL; /* ignore this thread in next loop */
3320 LOCK_THREAD (thread);
3322 if ((thread->state & ThreadState_Suspended) != 0 ||
3323 (thread->state & ThreadState_StopRequested) != 0 ||
3324 (thread->state & ThreadState_Stopped) != 0) {
3325 UNLOCK_THREAD (thread);
3326 CloseHandle (wait->handles [i]);
3327 wait->threads [i] = NULL; /* ignore this thread in next loop */
3333 /* Convert abort requests into suspend requests */
3334 if ((thread->state & ThreadState_AbortRequested) != 0)
3335 thread->state &= ~ThreadState_AbortRequested;
3337 thread->state |= ThreadState_SuspendRequested;
3339 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3340 async_suspend_internal (thread, TRUE);
3342 if (eventidx <= 0) {
3344 * If there are threads which are starting up, we wait until they
3345 * are suspended when they try to register in the threads hash.
3346 * This is guaranteed to finish, since the threads which can create new
3347 * threads get suspended after a while.
3348 * FIXME: The finalizer thread can still create new threads.
3350 mono_threads_lock ();
3351 if (threads_starting_up)
3352 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3355 mono_threads_unlock ();
3357 mono_thread_info_sleep (100, NULL);
3365 MonoInternalThread *thread;
3366 MonoStackFrameInfo *frames;
3367 int nframes, max_frames;
3368 int nthreads, max_threads;
3369 MonoInternalThread **threads;
3370 } ThreadDumpUserData;
3372 static gboolean thread_dump_requested;
3374 /* This needs to be async safe */
3376 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3378 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3380 if (ud->nframes < ud->max_frames) {
3381 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3388 /* This needs to be async safe */
3389 static SuspendThreadResult
3390 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3392 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3393 MonoInternalThread *thread = user_data->thread;
3396 /* This no longer works with remote unwinding */
3398 wapi_desc = wapi_current_thread_desc ();
3399 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3404 if (thread == mono_thread_internal_current ())
3405 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3407 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3409 return MonoResumeThread;
3413 int nthreads, max_threads;
3414 MonoInternalThread **threads;
3415 } CollectThreadsUserData;
3418 collect_thread (gpointer key, gpointer value, gpointer user)
3420 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3421 MonoInternalThread *thread = (MonoInternalThread *)value;
3423 if (ud->nthreads < ud->max_threads)
3424 ud->threads [ud->nthreads ++] = thread;
3428 * Collect running threads into the THREADS array.
3429 * THREADS should be an array allocated on the stack.
3432 collect_threads (MonoInternalThread **thread_array, int max_threads)
3434 CollectThreadsUserData ud;
3436 memset (&ud, 0, sizeof (ud));
3437 /* This array contains refs, but its on the stack, so its ok */
3438 ud.threads = thread_array;
3439 ud.max_threads = max_threads;
3441 mono_threads_lock ();
3442 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3443 mono_threads_unlock ();
3449 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3451 GString* text = g_string_new (0);
3453 GError *error = NULL;
3456 ud->thread = thread;
3459 /* Collect frames for the thread */
3460 if (thread == mono_thread_internal_current ()) {
3461 get_thread_dump (mono_thread_info_current (), ud);
3463 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3467 * Do all the non async-safe work outside of get_thread_dump.
3470 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3472 g_string_append_printf (text, "\n\"%s\"", name);
3475 else if (thread->threadpool_thread) {
3476 g_string_append (text, "\n\"<threadpool thread>\"");
3478 g_string_append (text, "\n\"<unnamed thread>\"");
3481 for (i = 0; i < ud->nframes; ++i) {
3482 MonoStackFrameInfo *frame = &ud->frames [i];
3483 MonoMethod *method = NULL;
3485 if (frame->type == FRAME_TYPE_MANAGED)
3486 method = mono_jit_info_get_method (frame->ji);
3489 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3490 g_string_append_printf (text, " %s\n", location);
3493 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3497 fprintf (stdout, "%s", text->str);
3499 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3500 OutputDebugStringA(text->str);
3503 g_string_free (text, TRUE);
3508 mono_threads_perform_thread_dump (void)
3510 ThreadDumpUserData ud;
3511 MonoInternalThread *thread_array [128];
3512 int tindex, nthreads;
3514 if (!thread_dump_requested)
3517 printf ("Full thread dump:\n");
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 for (tindex = 0; tindex < nthreads; ++tindex)
3527 dump_thread (thread_array [tindex], &ud);
3531 thread_dump_requested = FALSE;
3534 /* Obtain the thread dump of all threads */
3536 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3540 ThreadDumpUserData ud;
3541 MonoInternalThread *thread_array [128];
3542 MonoDomain *domain = mono_domain_get ();
3543 MonoDebugSourceLocation *location;
3544 int tindex, nthreads;
3546 mono_error_init (&error);
3548 *out_threads = NULL;
3549 *out_stack_frames = NULL;
3551 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3552 nthreads = collect_threads (thread_array, 128);
3554 memset (&ud, 0, sizeof (ud));
3555 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3556 ud.max_frames = 256;
3558 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, &error);
3559 if (!is_ok (&error))
3561 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, &error);
3562 if (!is_ok (&error))
3565 for (tindex = 0; tindex < nthreads; ++tindex) {
3566 MonoInternalThread *thread = thread_array [tindex];
3567 MonoArray *thread_frames;
3573 /* Collect frames for the thread */
3574 if (thread == mono_thread_internal_current ()) {
3575 get_thread_dump (mono_thread_info_current (), &ud);
3577 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3580 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3582 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, &error);
3583 if (!is_ok (&error))
3585 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3587 for (i = 0; i < ud.nframes; ++i) {
3588 MonoStackFrameInfo *frame = &ud.frames [i];
3589 MonoMethod *method = NULL;
3590 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3591 if (!mono_error_ok (&error))
3594 sf->native_offset = frame->native_offset;
3596 if (frame->type == FRAME_TYPE_MANAGED)
3597 method = mono_jit_info_get_method (frame->ji);
3600 sf->method_address = (gsize) frame->ji->code_start;
3602 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3603 mono_error_raise_exception (&error); /* FIXME don't raise here */
3604 MONO_OBJECT_SETREF (sf, method, rm);
3606 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3608 sf->il_offset = location->il_offset;
3610 if (location && location->source_file) {
3611 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3612 sf->line = location->row;
3613 sf->column = location->column;
3615 mono_debug_free_source_location (location);
3620 mono_array_setref (thread_frames, i, sf);
3626 mono_error_raise_exception (&error); /* FIXME don't raise here */
3630 * mono_threads_request_thread_dump:
3632 * Ask all threads except the current to print their stacktrace to stdout.
3635 mono_threads_request_thread_dump (void)
3637 /*The new thread dump code runs out of the finalizer thread. */
3638 thread_dump_requested = TRUE;
3639 mono_gc_finalize_notify ();
3644 gint allocated; /* +1 so that refs [allocated] == NULL */
3648 typedef struct ref_stack RefStack;
3651 ref_stack_new (gint initial_size)
3655 initial_size = MAX (initial_size, 16) + 1;
3656 rs = g_new0 (RefStack, 1);
3657 rs->refs = g_new0 (gpointer, initial_size);
3658 rs->allocated = initial_size;
3663 ref_stack_destroy (gpointer ptr)
3665 RefStack *rs = (RefStack *)ptr;
3674 ref_stack_push (RefStack *rs, gpointer ptr)
3676 g_assert (rs != NULL);
3678 if (rs->bottom >= rs->allocated) {
3679 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3680 rs->allocated <<= 1;
3681 rs->refs [rs->allocated] = NULL;
3683 rs->refs [rs->bottom++] = ptr;
3687 ref_stack_pop (RefStack *rs)
3689 if (rs == NULL || rs->bottom == 0)
3693 rs->refs [rs->bottom] = NULL;
3697 ref_stack_find (RefStack *rs, gpointer ptr)
3704 for (refs = rs->refs; refs && *refs; refs++) {
3712 * mono_thread_push_appdomain_ref:
3714 * Register that the current thread may have references to objects in domain
3715 * @domain on its stack. Each call to this function should be paired with a
3716 * call to pop_appdomain_ref.
3719 mono_thread_push_appdomain_ref (MonoDomain *domain)
3721 MonoInternalThread *thread = mono_thread_internal_current ();
3724 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3725 SPIN_LOCK (thread->lock_thread_id);
3726 if (thread->appdomain_refs == NULL)
3727 thread->appdomain_refs = ref_stack_new (16);
3728 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3729 SPIN_UNLOCK (thread->lock_thread_id);
3734 mono_thread_pop_appdomain_ref (void)
3736 MonoInternalThread *thread = mono_thread_internal_current ();
3739 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3740 SPIN_LOCK (thread->lock_thread_id);
3741 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3742 SPIN_UNLOCK (thread->lock_thread_id);
3747 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3750 SPIN_LOCK (thread->lock_thread_id);
3751 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3752 SPIN_UNLOCK (thread->lock_thread_id);
3757 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3759 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3762 typedef struct abort_appdomain_data {
3763 struct wait_data wait;
3765 } abort_appdomain_data;
3768 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3770 MonoInternalThread *thread = (MonoInternalThread*)value;
3771 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3772 MonoDomain *domain = data->domain;
3774 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3775 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3777 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3778 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3781 data->wait.handles [data->wait.num] = handle;
3782 data->wait.threads [data->wait.num] = thread;
3785 /* Just ignore the rest, we can't do anything with
3793 * mono_threads_abort_appdomain_threads:
3795 * Abort threads which has references to the given appdomain.
3798 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3800 #ifdef __native_client__
3804 abort_appdomain_data user_data;
3806 int orig_timeout = timeout;
3809 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3811 start_time = mono_msec_ticks ();
3813 mono_threads_lock ();
3815 user_data.domain = domain;
3816 user_data.wait.num = 0;
3817 /* This shouldn't take any locks */
3818 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3819 mono_threads_unlock ();
3821 if (user_data.wait.num > 0) {
3822 /* Abort the threads outside the threads lock */
3823 for (i = 0; i < user_data.wait.num; ++i)
3824 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3827 * We should wait for the threads either to abort, or to leave the
3828 * domain. We can't do the latter, so we wait with a timeout.
3830 wait_for_tids (&user_data.wait, 100);
3833 /* Update remaining time */
3834 timeout -= mono_msec_ticks () - start_time;
3835 start_time = mono_msec_ticks ();
3837 if (orig_timeout != -1 && timeout < 0)
3840 while (user_data.wait.num > 0);
3842 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3848 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3850 MonoInternalThread *thread = (MonoInternalThread*)value;
3851 MonoDomain *domain = (MonoDomain*)user_data;
3854 /* No locking needed here */
3855 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3857 if (thread->cached_culture_info) {
3858 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3859 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3860 if (obj && obj->vtable->domain == domain)
3861 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3867 * mono_threads_clear_cached_culture:
3869 * Clear the cached_current_culture from all threads if it is in the
3873 mono_threads_clear_cached_culture (MonoDomain *domain)
3875 mono_threads_lock ();
3876 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3877 mono_threads_unlock ();
3881 * mono_thread_get_undeniable_exception:
3883 * Return an exception which needs to be raised when leaving a catch clause.
3884 * This is used for undeniable exception propagation.
3887 mono_thread_get_undeniable_exception (void)
3889 MonoInternalThread *thread = mono_thread_internal_current ();
3891 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3893 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3894 * exception if the thread no longer references a dying appdomain.
3896 thread->abort_exc->trace_ips = NULL;
3897 thread->abort_exc->stack_trace = NULL;
3898 return thread->abort_exc;
3904 #if MONO_SMALL_CONFIG
3905 #define NUM_STATIC_DATA_IDX 4
3906 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3910 #define NUM_STATIC_DATA_IDX 8
3911 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3912 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3916 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3917 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3920 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3922 gpointer *static_data = (gpointer *)addr;
3924 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3925 void **ptr = (void **)static_data [i];
3930 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3931 void **p = ptr + idx;
3934 mark_func ((MonoObject**)p, gc_data);
3940 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3942 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3946 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3948 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3952 * mono_alloc_static_data
3954 * Allocate memory blocks for storing threads or context static data
3957 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3959 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3962 gpointer* static_data = *static_data_ptr;
3964 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3965 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3967 if (mono_gc_user_markers_supported ()) {
3968 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3969 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3971 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3972 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3975 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3976 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3977 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3978 *static_data_ptr = static_data;
3979 static_data [0] = static_data;
3982 for (i = 1; i <= idx; ++i) {
3983 if (static_data [i])
3986 if (mono_gc_user_markers_supported ())
3987 static_data [i] = g_malloc0 (static_data_size [i]);
3989 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3990 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3991 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3996 mono_free_static_data (gpointer* static_data)
3999 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4000 gpointer p = static_data [i];
4004 * At this point, the static data pointer array is still registered with the
4005 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4006 * data. Freeing the individual arrays without first nulling their slots
4007 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4008 * such an already freed array. See bug #13813.
4010 static_data [i] = NULL;
4011 mono_memory_write_barrier ();
4012 if (mono_gc_user_markers_supported ())
4015 mono_gc_free_fixed (p);
4017 mono_gc_free_fixed (static_data);
4021 * mono_init_static_data_info
4023 * Initializes static data counters
4025 static void mono_init_static_data_info (StaticDataInfo *static_data)
4027 static_data->idx = 0;
4028 static_data->offset = 0;
4029 static_data->freelist = NULL;
4033 * mono_alloc_static_data_slot
4035 * Generates an offset for static data. static_data contains the counters
4036 * used to generate it.
4039 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4041 if (!static_data->idx && !static_data->offset) {
4043 * we use the first chunk of the first allocation also as
4044 * an array for the rest of the data
4046 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4048 static_data->offset += align - 1;
4049 static_data->offset &= ~(align - 1);
4050 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4051 static_data->idx ++;
4052 g_assert (size <= static_data_size [static_data->idx]);
4053 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4054 static_data->offset = 0;
4056 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4057 static_data->offset += size;
4062 * ensure thread static fields already allocated are valid for thread
4063 * This function is called when a thread is created or on thread attach.
4066 thread_adjust_static_data (MonoInternalThread *thread)
4068 mono_threads_lock ();
4069 if (thread_static_info.offset || thread_static_info.idx > 0) {
4070 /* get the current allocated size */
4071 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4072 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4074 mono_threads_unlock ();
4078 * LOCKING: requires that threads_mutex is held
4081 context_adjust_static_data (MonoAppContext *ctx)
4083 if (context_static_info.offset || context_static_info.idx > 0) {
4084 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4085 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4086 ctx->data->static_data = ctx->static_data;
4091 * LOCKING: requires that threads_mutex is held
4094 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4096 MonoInternalThread *thread = (MonoInternalThread *)value;
4097 guint32 offset = GPOINTER_TO_UINT (user);
4099 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4103 * LOCKING: requires that threads_mutex is held
4106 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4108 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4113 guint32 offset = GPOINTER_TO_UINT (user);
4114 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4115 ctx->data->static_data = ctx->static_data;
4118 static StaticDataFreeList*
4119 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4121 StaticDataFreeList* prev = NULL;
4122 StaticDataFreeList* tmp = static_data->freelist;
4124 if (tmp->size == size) {
4126 prev->next = tmp->next;
4128 static_data->freelist = tmp->next;
4137 #if SIZEOF_VOID_P == 4
4144 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4146 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4148 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4149 MonoBitSet *rb = sets [idx];
4150 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4151 offset /= sizeof (uintptr_t);
4152 /* offset is now the bitmap offset */
4153 for (int i = 0; i < numbits; ++i) {
4154 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4155 mono_bitset_set_fast (rb, offset + i);
4160 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4162 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4163 MonoBitSet *rb = sets [idx];
4164 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4165 offset /= sizeof (uintptr_t);
4166 /* offset is now the bitmap offset */
4167 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4168 mono_bitset_clear_fast (rb, offset + i);
4172 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4174 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4176 StaticDataInfo *info;
4179 if (static_type == SPECIAL_STATIC_THREAD) {
4180 info = &thread_static_info;
4181 sets = thread_reference_bitmaps;
4183 info = &context_static_info;
4184 sets = context_reference_bitmaps;
4187 mono_threads_lock ();
4189 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4193 offset = item->offset;
4196 offset = mono_alloc_static_data_slot (info, size, align);
4199 update_reference_bitmap (sets, offset, bitmap, numbits);
4201 if (static_type == SPECIAL_STATIC_THREAD) {
4202 /* This can be called during startup */
4203 if (threads != NULL)
4204 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4206 if (contexts != NULL)
4207 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4209 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4212 mono_threads_unlock ();
4218 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4220 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4222 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4223 return get_thread_static_data (thread, offset);
4225 return get_context_static_data (thread->current_appcontext, offset);
4230 mono_get_special_static_data (guint32 offset)
4232 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4241 * LOCKING: requires that threads_mutex is held
4244 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4246 MonoInternalThread *thread = (MonoInternalThread *)value;
4247 OffsetSize *data = (OffsetSize *)user;
4248 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4249 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4252 if (!thread->static_data || !thread->static_data [idx])
4254 ptr = ((char*) thread->static_data [idx]) + off;
4255 mono_gc_bzero_atomic (ptr, data->size);
4259 * LOCKING: requires that threads_mutex is held
4262 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4264 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4269 OffsetSize *data = (OffsetSize *)user;
4270 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4271 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4274 if (!ctx->static_data || !ctx->static_data [idx])
4277 ptr = ((char*) ctx->static_data [idx]) + off;
4278 mono_gc_bzero_atomic (ptr, data->size);
4282 do_free_special_slot (guint32 offset, guint32 size)
4284 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4286 StaticDataInfo *info;
4288 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4289 info = &thread_static_info;
4290 sets = thread_reference_bitmaps;
4292 info = &context_static_info;
4293 sets = context_reference_bitmaps;
4296 guint32 data_offset = offset;
4297 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4298 OffsetSize data = { data_offset, size };
4300 clear_reference_bitmap (sets, data.offset, data.size);
4302 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4303 if (threads != NULL)
4304 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4306 if (contexts != NULL)
4307 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4310 if (!mono_runtime_is_shutting_down ()) {
4311 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4313 item->offset = offset;
4316 item->next = info->freelist;
4317 info->freelist = item;
4322 do_free_special (gpointer key, gpointer value, gpointer data)
4324 MonoClassField *field = (MonoClassField *)key;
4325 guint32 offset = GPOINTER_TO_UINT (value);
4328 size = mono_type_size (field->type, &align);
4329 do_free_special_slot (offset, size);
4333 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4335 mono_threads_lock ();
4337 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4339 mono_threads_unlock ();
4343 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4345 /* Only ever called for ThreadLocal instances */
4346 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4348 mono_threads_lock ();
4349 do_free_special_slot (offset, size);
4350 mono_threads_unlock ();
4354 static void CALLBACK dummy_apc (ULONG_PTR param)
4360 * mono_thread_execute_interruption
4362 * Performs the operation that the requested thread state requires (abort,
4365 static MonoException*
4366 mono_thread_execute_interruption (void)
4368 MonoInternalThread *thread = mono_thread_internal_current ();
4369 MonoThread *sys_thread = mono_thread_current ();
4371 LOCK_THREAD (thread);
4373 /* MonoThread::interruption_requested can only be changed with atomics */
4374 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4375 /* this will consume pending APC calls */
4377 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4379 InterlockedDecrement (&thread_interruption_requested);
4381 /* Clear the interrupted flag of the thread so it can wait again */
4382 mono_thread_info_clear_self_interrupt ();
4385 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4386 if (sys_thread->pending_exception) {
4389 exc = sys_thread->pending_exception;
4390 sys_thread->pending_exception = NULL;
4392 UNLOCK_THREAD (thread);
4394 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4395 UNLOCK_THREAD (thread);
4396 g_assert (sys_thread->pending_exception == NULL);
4397 if (thread->abort_exc == NULL) {
4399 * This might be racy, but it has to be called outside the lock
4400 * since it calls managed code.
4402 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4404 return thread->abort_exc;
4406 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4407 /* calls UNLOCK_THREAD (thread) */
4408 self_suspend_internal ();
4411 else if ((thread->state & ThreadState_StopRequested) != 0) {
4412 /* FIXME: do this through the JIT? */
4414 UNLOCK_THREAD (thread);
4416 mono_thread_exit ();
4418 } else if (thread->thread_interrupt_requested) {
4420 thread->thread_interrupt_requested = FALSE;
4421 UNLOCK_THREAD (thread);
4423 return(mono_get_exception_thread_interrupted ());
4426 UNLOCK_THREAD (thread);
4432 * mono_thread_request_interruption
4434 * A signal handler can call this method to request the interruption of a
4435 * thread. The result of the interruption will depend on the current state of
4436 * the thread. If the result is an exception that needs to be throw, it is
4437 * provided as return value.
4440 mono_thread_request_interruption (gboolean running_managed)
4442 MonoInternalThread *thread = mono_thread_internal_current ();
4444 /* The thread may already be stopping */
4449 if (thread->interrupt_on_stop &&
4450 thread->state & ThreadState_StopRequested &&
4451 thread->state & ThreadState_Background)
4455 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4457 InterlockedIncrement (&thread_interruption_requested);
4459 if (!running_managed || is_running_protected_wrapper ()) {
4460 /* Can't stop while in unmanaged code. Increase the global interruption
4461 request count. When exiting the unmanaged method the count will be
4462 checked and the thread will be interrupted. */
4464 /* this will awake the thread if it is in WaitForSingleObject
4466 /* Our implementation of this function ignores the func argument */
4468 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4470 mono_thread_info_self_interrupt ();
4475 return mono_thread_execute_interruption ();
4479 /*This function should be called by a thread after it has exited all of
4480 * its handle blocks at interruption time.*/
4482 mono_thread_resume_interruption (void)
4484 MonoInternalThread *thread = mono_thread_internal_current ();
4485 gboolean still_aborting;
4487 /* The thread may already be stopping */
4491 LOCK_THREAD (thread);
4492 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4493 UNLOCK_THREAD (thread);
4495 /*This can happen if the protected block called Thread::ResetAbort*/
4496 if (!still_aborting)
4499 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4501 InterlockedIncrement (&thread_interruption_requested);
4503 mono_thread_info_self_interrupt ();
4505 return mono_thread_execute_interruption ();
4508 gboolean mono_thread_interruption_requested ()
4510 if (thread_interruption_requested) {
4511 MonoInternalThread *thread = mono_thread_internal_current ();
4512 /* The thread may already be stopping */
4514 return (thread->interruption_requested);
4519 static MonoException*
4520 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4522 MonoInternalThread *thread = mono_thread_internal_current ();
4524 /* The thread may already be stopping */
4528 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4529 MonoException* exc = mono_thread_execute_interruption ();
4537 * Performs the interruption of the current thread, if one has been requested,
4538 * and the thread is not running a protected wrapper.
4539 * Return the exception which needs to be thrown, if any.
4542 mono_thread_interruption_checkpoint (void)
4544 return mono_thread_interruption_checkpoint_request (FALSE);
4548 * Performs the interruption of the current thread, if one has been requested.
4549 * Return the exception which needs to be thrown, if any.
4552 mono_thread_force_interruption_checkpoint_noraise (void)
4554 return mono_thread_interruption_checkpoint_request (TRUE);
4558 * mono_set_pending_exception:
4560 * Set the pending exception of the current thread to EXC.
4561 * The exception will be thrown when execution returns to managed code.
4564 mono_set_pending_exception (MonoException *exc)
4566 MonoThread *thread = mono_thread_current ();
4568 /* The thread may already be stopping */
4572 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4574 mono_thread_request_interruption (FALSE);
4578 * mono_thread_interruption_request_flag:
4580 * Returns the address of a flag that will be non-zero if an interruption has
4581 * been requested for a thread. The thread to interrupt may not be the current
4582 * thread, so an additional call to mono_thread_interruption_requested() or
4583 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4586 gint32* mono_thread_interruption_request_flag ()
4588 return &thread_interruption_requested;
4592 mono_thread_init_apartment_state (void)
4595 MonoInternalThread* thread = mono_thread_internal_current ();
4597 /* Positive return value indicates success, either
4598 * S_OK if this is first CoInitialize call, or
4599 * S_FALSE if CoInitialize already called, but with same
4600 * threading model. A negative value indicates failure,
4601 * probably due to trying to change the threading model.
4603 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4604 ? COINIT_APARTMENTTHREADED
4605 : COINIT_MULTITHREADED) < 0) {
4606 thread->apartment_state = ThreadApartmentState_Unknown;
4612 mono_thread_cleanup_apartment_state (void)
4615 MonoInternalThread* thread = mono_thread_internal_current ();
4617 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4624 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4626 LOCK_THREAD (thread);
4627 thread->state |= state;
4628 UNLOCK_THREAD (thread);
4632 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4634 LOCK_THREAD (thread);
4635 thread->state &= ~state;
4636 UNLOCK_THREAD (thread);
4640 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4642 gboolean ret = FALSE;
4644 LOCK_THREAD (thread);
4646 if ((thread->state & test) != 0) {
4650 UNLOCK_THREAD (thread);
4655 static gboolean has_tls_get = FALSE;
4658 mono_runtime_set_has_tls_get (gboolean val)
4664 mono_runtime_has_tls_get (void)
4670 self_interrupt_thread (void *_unused)
4672 MonoThreadInfo *info = mono_thread_info_current ();
4673 MonoException *exc = mono_thread_execute_interruption ();
4674 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4675 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. */
4676 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4680 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4684 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4688 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4690 MonoJitInfo **dest = (MonoJitInfo **)data;
4696 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4698 MonoJitInfo *ji = NULL;
4703 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4704 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4705 * where we hold runtime locks.
4707 if (!mono_threads_is_coop_enabled ())
4708 mono_thread_info_set_is_async_context (TRUE);
4709 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4710 if (!mono_threads_is_coop_enabled ())
4711 mono_thread_info_set_is_async_context (FALSE);
4716 MonoInternalThread *thread;
4717 gboolean install_async_abort;
4718 MonoThreadInfoInterruptToken *interrupt_token;
4721 static SuspendThreadResult
4722 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4724 AbortThreadData *data = (AbortThreadData *)ud;
4725 MonoInternalThread *thread = data->thread;
4726 MonoJitInfo *ji = NULL;
4727 gboolean protected_wrapper;
4728 gboolean running_managed;
4730 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4731 return MonoResumeThread;
4733 /*someone is already interrupting it*/
4734 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4735 return MonoResumeThread;
4737 InterlockedIncrement (&thread_interruption_requested);
4739 ji = mono_thread_info_get_last_managed (info);
4740 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4741 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4743 if (!protected_wrapper && running_managed) {
4744 /*We are in managed code*/
4745 /*Set the thread to call */
4746 if (data->install_async_abort)
4747 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4748 return MonoResumeThread;
4751 * This will cause waits to be broken.
4752 * It will also prevent the thread from entering a wait, so if the thread returns
4753 * from the wait before it receives the abort signal, it will just spin in the wait
4754 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4757 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4759 return MonoResumeThread;
4764 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4766 AbortThreadData data;
4768 g_assert (thread != mono_thread_internal_current ());
4770 data.thread = thread;
4771 data.install_async_abort = install_async_abort;
4772 data.interrupt_token = NULL;
4774 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4775 if (data.interrupt_token)
4776 mono_thread_info_finish_interrupt (data.interrupt_token);
4777 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4781 self_abort_internal (void)
4785 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4786 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4788 exc = mono_thread_request_interruption (TRUE);
4790 mono_raise_exception (exc);
4792 mono_thread_info_self_interrupt ();
4796 MonoInternalThread *thread;
4798 MonoThreadInfoInterruptToken *interrupt_token;
4799 } SuspendThreadData;
4801 static SuspendThreadResult
4802 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4804 SuspendThreadData *data = (SuspendThreadData *)ud;
4805 MonoInternalThread *thread = data->thread;
4806 MonoJitInfo *ji = NULL;
4807 gboolean protected_wrapper;
4808 gboolean running_managed;
4810 ji = mono_thread_info_get_last_managed (info);
4811 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4812 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4814 if (running_managed && !protected_wrapper) {
4815 thread->state &= ~ThreadState_SuspendRequested;
4816 thread->state |= ThreadState_Suspended;
4817 return KeepSuspended;
4819 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4820 InterlockedIncrement (&thread_interruption_requested);
4821 if (data->interrupt)
4822 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4824 return MonoResumeThread;
4828 /* LOCKING: called with @thread synch_cs held, and releases it */
4830 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4832 SuspendThreadData data;
4834 g_assert (thread != mono_thread_internal_current ());
4836 data.thread = thread;
4837 data.interrupt = interrupt;
4838 data.interrupt_token = NULL;
4840 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4841 if (data.interrupt_token)
4842 mono_thread_info_finish_interrupt (data.interrupt_token);
4844 UNLOCK_THREAD (thread);
4847 /* LOCKING: called with @thread synch_cs held, and releases it */
4849 self_suspend_internal (void)
4851 MonoInternalThread *thread;
4853 thread = mono_thread_internal_current ();
4855 mono_thread_info_begin_self_suspend ();
4856 thread->state &= ~ThreadState_SuspendRequested;
4857 thread->state |= ThreadState_Suspended;
4859 UNLOCK_THREAD (thread);
4861 mono_thread_info_end_self_suspend ();
4865 * mono_thread_is_foreign:
4866 * @thread: the thread to query
4868 * This function allows one to determine if a thread was created by the mono runtime and has
4869 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4871 * Returns: TRUE if @thread was not created by the runtime.
4874 mono_thread_is_foreign (MonoThread *thread)
4876 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4877 return info->runtime_thread == FALSE;
4881 * mono_add_joinable_thread:
4883 * Add TID to the list of joinable threads.
4884 * LOCKING: Acquires the threads lock.
4887 mono_threads_add_joinable_thread (gpointer tid)
4891 * We cannot detach from threads because it causes problems like
4892 * 2fd16f60/r114307. So we collect them and join them when
4893 * we have time (in he finalizer thread).
4895 joinable_threads_lock ();
4896 if (!joinable_threads)
4897 joinable_threads = g_hash_table_new (NULL, NULL);
4898 g_hash_table_insert (joinable_threads, tid, tid);
4899 joinable_thread_count ++;
4900 joinable_threads_unlock ();
4902 mono_gc_finalize_notify ();
4907 * mono_threads_join_threads:
4909 * Join all joinable threads. This is called from the finalizer thread.
4910 * LOCKING: Acquires the threads lock.
4913 mono_threads_join_threads (void)
4916 GHashTableIter iter;
4923 if (!joinable_thread_count)
4927 joinable_threads_lock ();
4929 if (g_hash_table_size (joinable_threads)) {
4930 g_hash_table_iter_init (&iter, joinable_threads);
4931 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4932 thread = (pthread_t)tid;
4933 g_hash_table_remove (joinable_threads, key);
4934 joinable_thread_count --;
4937 joinable_threads_unlock ();
4939 if (thread != pthread_self ())
4940 /* This shouldn't block */
4941 pthread_join (thread, NULL);
4952 * Wait for thread TID to exit.
4953 * LOCKING: Acquires the threads lock.
4956 mono_thread_join (gpointer tid)
4960 gboolean found = FALSE;
4962 joinable_threads_lock ();
4963 if (!joinable_threads)
4964 joinable_threads = g_hash_table_new (NULL, NULL);
4965 if (g_hash_table_lookup (joinable_threads, tid)) {
4966 g_hash_table_remove (joinable_threads, tid);
4967 joinable_thread_count --;
4970 joinable_threads_unlock ();
4973 thread = (pthread_t)tid;
4974 pthread_join (thread, NULL);
4979 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4981 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4982 mono_thread_interruption_checkpoint ();
4985 static inline gboolean
4986 is_appdomainunloaded_exception (MonoClass *klass)
4988 return klass == mono_class_get_appdomain_unloaded_exception_class ();
4991 static inline gboolean
4992 is_threadabort_exception (MonoClass *klass)
4994 return klass == mono_defaults.threadabortexception_class;
4998 mono_thread_internal_unhandled_exception (MonoObject* exc)
5000 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5001 MonoClass *klass = exc->vtable->klass;
5002 if (is_threadabort_exception (klass)) {
5003 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5004 } else if (!is_appdomainunloaded_exception (klass)) {
5005 mono_unhandled_exception (exc);
5006 if (mono_environment_exitcode_get () == 1)
5013 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5015 mono_threads_get_thread_dump (out_threads, out_stack_traces);