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)
261 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
265 static inline MonoNativeThreadId
266 thread_get_tid (MonoInternalThread *thread)
268 /* We store the tid as a guint64 to keep the object layout constant between platforms */
269 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
272 /* handle_store() and handle_remove() manage the array of threads that
273 * still need to be waited for when the main thread exits.
275 * If handle_store() returns FALSE the thread must not be started
276 * because Mono is shutting down.
278 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
280 mono_threads_lock ();
282 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
284 if (threads_starting_up)
285 mono_g_hash_table_remove (threads_starting_up, thread);
287 if (shutting_down && !force_attach) {
288 mono_threads_unlock ();
293 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
294 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
297 /* We don't need to duplicate thread->handle, because it is
298 * only closed when the thread object is finalized by the GC.
300 g_assert (thread->internal_thread);
301 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
302 thread->internal_thread);
304 mono_threads_unlock ();
309 static gboolean handle_remove(MonoInternalThread *thread)
312 gsize tid = thread->tid;
314 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
316 mono_threads_lock ();
319 /* We have to check whether the thread object for the
320 * tid is still the same in the table because the
321 * thread might have been destroyed and the tid reused
322 * in the meantime, in which case the tid would be in
323 * the table, but with another thread object.
325 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
326 mono_g_hash_table_remove (threads, (gpointer)tid);
335 mono_threads_unlock ();
337 /* Don't close the handle here, wait for the object finalizer
338 * to do it. Otherwise, the following race condition applies:
340 * 1) Thread exits (and handle_remove() closes the handle)
342 * 2) Some other handle is reassigned the same slot
344 * 3) Another thread tries to join the first thread, and
345 * blocks waiting for the reassigned handle to be signalled
346 * (which might never happen). This is possible, because the
347 * thread calling Join() still has a reference to the first
353 static void ensure_synch_cs_set (MonoInternalThread *thread)
355 MonoCoopMutex *synch_cs;
357 if (thread->synch_cs != NULL) {
361 synch_cs = g_new0 (MonoCoopMutex, 1);
362 mono_coop_mutex_init_recursive (synch_cs);
364 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
365 synch_cs, NULL) != NULL) {
366 /* Another thread must have installed this CS */
367 mono_coop_mutex_destroy (synch_cs);
373 lock_thread (MonoInternalThread *thread)
375 if (!thread->synch_cs)
376 ensure_synch_cs_set (thread);
378 g_assert (thread->synch_cs);
380 mono_coop_mutex_lock (thread->synch_cs);
384 unlock_thread (MonoInternalThread *thread)
386 mono_coop_mutex_unlock (thread->synch_cs);
390 * NOTE: this function can be called also for threads different from the current one:
391 * make sure no code called from it will ever assume it is run on the thread that is
392 * getting cleaned up.
394 static void thread_cleanup (MonoInternalThread *thread)
396 g_assert (thread != NULL);
398 if (thread->abort_state_handle) {
399 mono_gchandle_free (thread->abort_state_handle);
400 thread->abort_state_handle = 0;
402 thread->abort_exc = NULL;
403 thread->current_appcontext = NULL;
406 * This is necessary because otherwise we might have
407 * cross-domain references which will not get cleaned up when
408 * the target domain is unloaded.
410 if (thread->cached_culture_info) {
412 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
413 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
417 * thread->synch_cs can be NULL if this was called after
418 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
419 * This can happen only during shutdown.
420 * The shutting_down flag is not always set, so we can't assert on it.
422 if (thread->synch_cs)
423 LOCK_THREAD (thread);
425 thread->state |= ThreadState_Stopped;
426 thread->state &= ~ThreadState_Background;
428 if (thread->synch_cs)
429 UNLOCK_THREAD (thread);
432 An interruption request has leaked to cleanup. Adjust the global counter.
434 This can happen is the abort source thread finds the abortee (this) thread
435 in unmanaged code. If this thread never trips back to managed code or check
436 the local flag it will be left set and positively unbalance the global counter.
438 Leaving the counter unbalanced will cause a performance degradation since all threads
439 will now keep checking their local flags all the time.
441 if (InterlockedExchange (&thread->interruption_requested, 0))
442 InterlockedDecrement (&thread_interruption_requested);
444 /* if the thread is not in the hash it has been removed already */
445 if (!handle_remove (thread)) {
446 if (thread == mono_thread_internal_current ()) {
447 mono_domain_unset ();
448 mono_memory_barrier ();
450 /* This needs to be called even if handle_remove () fails */
451 if (mono_thread_cleanup_fn)
452 mono_thread_cleanup_fn (thread_get_tid (thread));
455 mono_release_type_locks (thread);
457 /* Can happen when we attach the profiler helper thread in order to heapshot. */
458 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
459 mono_profiler_thread_end (thread->tid);
461 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
463 if (thread == mono_thread_internal_current ()) {
465 * This will signal async signal handlers that the thread has exited.
466 * The profiler callback needs this to be set, so it cannot be done earlier.
468 mono_domain_unset ();
469 mono_memory_barrier ();
472 if (thread == mono_thread_internal_current ())
473 mono_thread_pop_appdomain_ref ();
475 thread->cached_culture_info = NULL;
477 mono_free_static_data (thread->static_data);
478 thread->static_data = NULL;
479 ref_stack_destroy (thread->appdomain_refs);
480 thread->appdomain_refs = NULL;
482 if (mono_thread_cleanup_fn)
483 mono_thread_cleanup_fn (thread_get_tid (thread));
485 if (mono_gc_is_moving ()) {
486 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
487 thread->thread_pinning_ref = NULL;
493 * A special static data offset (guint32) consists of 3 parts:
495 * [0] 6-bit index into the array of chunks.
496 * [6] 25-bit offset into the array.
497 * [31] Bit indicating thread or context static.
502 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
513 } SpecialStaticOffset;
515 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
516 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
518 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
519 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
520 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
521 (((SpecialStaticOffset *) &(x))->fields.f)
524 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
526 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
528 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
529 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
531 return ((char *) thread->static_data [idx]) + off;
535 get_context_static_data (MonoAppContext *ctx, guint32 offset)
537 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
539 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
540 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
542 return ((char *) ctx->static_data [idx]) + off;
546 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
548 static MonoClassField *current_thread_field = NULL;
552 if (!current_thread_field) {
553 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
554 g_assert (current_thread_field);
557 mono_class_vtable (domain, mono_defaults.thread_class);
558 mono_domain_lock (domain);
559 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
560 mono_domain_unlock (domain);
563 return (MonoThread **)get_thread_static_data (thread, offset);
567 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
569 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
571 g_assert (current->obj.vtable->domain == domain);
573 g_assert (!*current_thread_ptr);
574 *current_thread_ptr = current;
578 create_thread_object (MonoDomain *domain, MonoError *error)
580 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
581 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
586 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
590 thread = create_thread_object (domain, error);
591 if (!mono_error_ok (error))
594 MONO_OBJECT_SETREF (thread, internal_thread, internal);
599 static MonoInternalThread*
600 create_internal_thread (MonoError *error)
602 MonoInternalThread *thread;
605 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
606 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
607 if (!mono_error_ok (error))
610 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
611 mono_coop_mutex_init_recursive (thread->synch_cs);
613 thread->apartment_state = ThreadApartmentState_Unknown;
614 thread->managed_id = get_next_managed_thread_id ();
615 if (mono_gc_is_moving ()) {
616 thread->thread_pinning_ref = thread;
617 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
624 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate, MonoError *error)
626 MonoDomain *domain = mono_get_root_domain ();
628 mono_error_init (error);
629 if (!candidate || candidate->obj.vtable->domain != domain) {
630 candidate = new_thread_with_internal (domain, thread, error);
631 return_val_if_nok (error, FALSE);
633 set_current_thread_for_domain (domain, thread, candidate);
634 g_assert (!thread->root_domain_thread);
635 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
639 static guint32 WINAPI start_wrapper_internal(void *data)
642 MonoThreadInfo *info;
643 StartInfo *start_info = (StartInfo *)data;
644 guint32 (*start_func)(void *);
648 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
651 MonoInternalThread *internal = start_info->obj->internal_thread;
652 MonoObject *start_delegate = start_info->delegate;
653 MonoDomain *domain = start_info->obj->obj.vtable->domain;
655 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
657 /* We can be sure start_info->obj->tid and
658 * start_info->obj->handle have been set, because the thread
659 * was created suspended, and these values were set before the
663 info = mono_thread_info_current ();
665 internal->thread_info = info;
666 internal->small_id = info->small_id;
670 SET_CURRENT_OBJECT (internal);
672 /* Every thread references the appdomain which created it */
673 mono_thread_push_appdomain_ref (domain);
675 if (!mono_domain_set (domain, FALSE)) {
676 /* No point in raising an appdomain_unloaded exception here */
677 /* FIXME: Cleanup here */
678 mono_thread_pop_appdomain_ref ();
682 start_func = start_info->func;
683 start_arg = start_info->obj->start_obj;
685 start_arg = start_info->start_arg;
687 /* We have to do this here because mono_thread_new_init()
688 requires that root_domain_thread is set up. */
689 thread_adjust_static_data (internal);
690 init_root_domain_thread (internal, start_info->obj, &error);
691 mono_error_raise_exception (&error); /* FIXME don't raise here */
693 /* This MUST be called before any managed code can be
694 * executed, as it calls the callback function that (for the
695 * jit) sets the lmf marker.
697 mono_thread_new_init (tid, &tid, start_func);
698 internal->stack_ptr = &tid;
699 if (domain != mono_get_root_domain ())
700 set_current_thread_for_domain (domain, internal, start_info->obj);
702 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
704 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
706 /* On 2.0 profile (and higher), set explicitly since state might have been
708 if (internal->apartment_state == ThreadApartmentState_Unknown)
709 internal->apartment_state = ThreadApartmentState_MTA;
711 mono_thread_init_apartment_state ();
713 if(internal->start_notify!=NULL) {
714 /* Let the thread that called Start() know we're
717 ReleaseSemaphore (internal->start_notify, 1, NULL);
721 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
725 * Call this after calling start_notify, since the profiler callback might want
726 * to lock the thread, and the lock is held by thread_start () which waits for
729 mono_profiler_thread_start (tid);
731 /* if the name was set before starting, we didn't invoke the profiler callback */
732 if (internal->name) {
733 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
734 mono_profiler_thread_name (internal->tid, tname);
735 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
739 /* start_func is set only for unmanaged start functions */
741 start_func (start_arg);
744 g_assert (start_delegate != NULL);
745 args [0] = start_arg;
746 /* we may want to handle the exception here. See comment below on unhandled exceptions */
747 mono_runtime_delegate_invoke (start_delegate, args, NULL);
750 /* If the thread calls ExitThread at all, this remaining code
751 * will not be executed, but the main thread will eventually
752 * call thread_cleanup() on this thread's behalf.
755 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
757 /* Do any cleanup needed for apartment state. This
758 * cannot be done in thread_cleanup since thread_cleanup could be
759 * called for a thread other than the current thread.
760 * mono_thread_cleanup_apartment_state cleans up apartment
761 * for the current thead */
762 mono_thread_cleanup_apartment_state ();
764 thread_cleanup (internal);
768 /* Remove the reference to the thread object in the TLS data,
769 * so the thread object can be finalized. This won't be
770 * reached if the thread threw an uncaught exception, so those
771 * thread handles will stay referenced :-( (This is due to
772 * missing support for scanning thread-specific data in the
773 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
776 SET_CURRENT_OBJECT (NULL);
781 static guint32 WINAPI start_wrapper(void *data)
785 /* Avoid scanning the frames above this frame during a GC */
786 mono_gc_set_stack_end ((void*)&dummy);
788 return start_wrapper_internal (data);
794 * Common thread creation code.
795 * LOCKING: Acquires the threads lock.
798 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
801 HANDLE thread_handle;
802 MonoNativeThreadId tid;
803 guint32 create_flags;
806 * Join joinable threads to prevent running out of threads since the finalizer
807 * thread might be blocked/backlogged.
809 mono_threads_join_threads ();
811 mono_error_init (error);
813 mono_threads_lock ();
816 mono_threads_unlock ();
819 if (threads_starting_up == NULL) {
820 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
821 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
823 mono_g_hash_table_insert (threads_starting_up, thread, thread);
824 mono_threads_unlock ();
826 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
827 if (!internal->start_notify) {
828 mono_threads_lock ();
829 mono_g_hash_table_remove (threads_starting_up, thread);
830 mono_threads_unlock ();
831 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
837 stack_size = default_stacksize_for_thread (internal);
839 /* Create suspended, so we can do some housekeeping before the thread
842 create_flags = CREATE_SUSPENDED;
844 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
845 stack_size, create_flags, &tid);
847 if (thread_handle == NULL) {
848 /* The thread couldn't be created, so set an exception */
849 mono_threads_lock ();
850 mono_g_hash_table_remove (threads_starting_up, thread);
851 mono_threads_unlock ();
853 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
856 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
858 internal->handle = thread_handle;
859 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
861 internal->threadpool_thread = threadpool_thread;
862 if (threadpool_thread)
863 mono_thread_set_state (internal, ThreadState_Background);
865 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
867 /* Only store the handle when the thread is about to be
868 * launched, to avoid the main thread deadlocking while trying
869 * to clean up a thread that will never be signalled.
871 if (!handle_store (thread, FALSE))
874 mono_thread_info_resume (tid);
876 if (internal->start_notify) {
878 * Wait for the thread to set up its TLS data etc, so
879 * theres no potential race condition if someone tries
880 * to look up the data believing the thread has
883 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));
886 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
889 CloseHandle (internal->start_notify);
890 internal->start_notify = NULL;
893 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));
898 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
900 if (mono_thread_start_cb) {
901 mono_thread_start_cb (tid, stack_start, func);
905 void mono_threads_set_default_stacksize (guint32 stacksize)
907 default_stacksize = stacksize;
910 guint32 mono_threads_get_default_stacksize (void)
912 return default_stacksize;
916 * mono_thread_create_internal:
918 * ARG should not be a GC reference.
921 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
924 MonoInternalThread *internal;
925 StartInfo *start_info;
928 mono_error_init (error);
930 thread = create_thread_object (domain, error);
931 return_val_if_nok (error, NULL);
933 internal = create_internal_thread (error);
934 return_val_if_nok (error, NULL);
936 MONO_OBJECT_SETREF (thread, internal_thread, internal);
938 start_info = g_new0 (StartInfo, 1);
939 start_info->func = (guint32 (*)(void *))func;
940 start_info->obj = thread;
941 start_info->start_arg = arg;
943 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, error);
944 return_val_if_nok (error, NULL);
946 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
947 #ifndef MONO_CROSS_COMPILE
948 if (mono_check_corlib_version () == NULL)
949 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
956 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
959 if (!mono_thread_create_checked (domain, func, arg, &error))
960 mono_error_cleanup (&error);
964 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
966 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
970 mono_thread_attach (MonoDomain *domain)
973 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
974 mono_error_raise_exception (&error);
980 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
982 MonoThreadInfo *info;
983 MonoInternalThread *thread;
984 MonoThread *current_thread;
985 HANDLE thread_handle;
986 MonoNativeThreadId tid;
988 mono_error_init (error);
990 if ((thread = mono_thread_internal_current ())) {
991 if (domain != mono_domain_get ())
992 mono_domain_set (domain, TRUE);
993 /* Already attached */
994 return mono_thread_current ();
997 if (!mono_gc_register_thread (&domain)) {
998 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 ());
1001 thread = create_internal_thread (error);
1002 if (!mono_error_ok (error))
1005 thread_handle = mono_thread_info_open_handle ();
1006 g_assert (thread_handle);
1008 tid=mono_native_thread_id_get ();
1010 thread->handle = thread_handle;
1011 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
1012 thread->stack_ptr = &tid;
1014 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1016 info = mono_thread_info_current ();
1018 thread->thread_info = info;
1019 thread->small_id = info->small_id;
1021 current_thread = new_thread_with_internal (domain, thread, error);
1022 if (!mono_error_ok (error))
1025 if (!handle_store (current_thread, force_attach)) {
1026 /* Mono is shutting down, so just wait for the end */
1028 mono_thread_info_sleep (10000, NULL);
1031 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1033 SET_CURRENT_OBJECT (thread);
1034 mono_domain_set (domain, TRUE);
1036 thread_adjust_static_data (thread);
1038 init_root_domain_thread (thread, current_thread, error);
1039 return_val_if_nok (error, NULL);
1041 if (domain != mono_get_root_domain ())
1042 set_current_thread_for_domain (domain, thread, current_thread);
1045 if (mono_thread_attach_cb) {
1049 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1052 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1054 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1057 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1058 if (!info->tools_thread)
1059 // FIXME: Need a separate callback
1060 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1062 return current_thread;
1066 mono_thread_detach_internal (MonoInternalThread *thread)
1068 g_return_if_fail (thread != NULL);
1070 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1072 thread_cleanup (thread);
1074 SET_CURRENT_OBJECT (NULL);
1075 mono_domain_unset ();
1077 /* Don't need to CloseHandle this thread, even though we took a
1078 * reference in mono_thread_attach (), because the GC will do it
1079 * when the Thread object is finalised.
1084 mono_thread_detach (MonoThread *thread)
1087 mono_thread_detach_internal (thread->internal_thread);
1091 * mono_thread_detach_if_exiting:
1093 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1094 * This should be used at the end of embedding code which calls into managed code, and which
1095 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1098 mono_thread_detach_if_exiting (void)
1100 if (mono_thread_info_is_exiting ()) {
1101 MonoInternalThread *thread;
1103 thread = mono_thread_internal_current ();
1105 mono_thread_detach_internal (thread);
1106 mono_thread_info_detach ();
1114 MonoInternalThread *thread = mono_thread_internal_current ();
1116 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1118 thread_cleanup (thread);
1119 SET_CURRENT_OBJECT (NULL);
1120 mono_domain_unset ();
1122 /* we could add a callback here for embedders to use. */
1123 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1124 exit (mono_environment_exitcode_get ());
1125 mono_thread_info_exit ();
1129 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1132 MonoInternalThread *internal;
1134 internal = create_internal_thread (&error);
1135 mono_error_raise_exception (&error);
1137 internal->state = ThreadState_Unstarted;
1139 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1143 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1147 StartInfo *start_info;
1148 MonoInternalThread *internal;
1151 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1153 if (!this_obj->internal_thread)
1154 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1155 internal = this_obj->internal_thread;
1157 LOCK_THREAD (internal);
1159 if ((internal->state & ThreadState_Unstarted) == 0) {
1160 UNLOCK_THREAD (internal);
1161 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1165 if ((internal->state & ThreadState_Aborted) != 0) {
1166 UNLOCK_THREAD (internal);
1169 /* This is freed in start_wrapper */
1170 start_info = g_new0 (StartInfo, 1);
1171 start_info->func = NULL;
1172 start_info->start_arg = NULL;
1173 start_info->delegate = start;
1174 start_info->obj = this_obj;
1175 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1177 res = create_thread (this_obj, internal, start_info, FALSE, 0, &error);
1179 mono_error_cleanup (&error);
1180 UNLOCK_THREAD (internal);
1184 internal->state &= ~ThreadState_Unstarted;
1186 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1188 UNLOCK_THREAD (internal);
1189 return internal->handle;
1193 * This is called from the finalizer of the internal thread object.
1196 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1198 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1201 * Since threads keep a reference to their thread object while running, by the time this function is called,
1202 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1203 * when thread_cleanup () can be called after this.
1206 CloseHandle (thread);
1208 if (this_obj->synch_cs) {
1209 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1210 this_obj->synch_cs = NULL;
1211 mono_coop_mutex_destroy (synch_cs);
1215 if (this_obj->name) {
1216 void *name = this_obj->name;
1217 this_obj->name = NULL;
1223 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1226 MonoInternalThread *thread = mono_thread_internal_current ();
1228 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1230 if (mono_thread_current_check_pending_interrupt ())
1234 gboolean alerted = FALSE;
1236 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1238 res = mono_thread_info_sleep (ms, &alerted);
1240 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1243 MonoException* exc = mono_thread_execute_interruption ();
1245 mono_set_pending_exception (exc);
1258 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1263 ves_icall_System_Threading_Thread_GetDomainID (void)
1265 return mono_domain_get()->domain_id;
1269 ves_icall_System_Threading_Thread_Yield (void)
1271 return mono_thread_info_yield ();
1275 * mono_thread_get_name:
1277 * Return the name of the thread. NAME_LEN is set to the length of the name.
1278 * Return NULL if the thread has no name. The returned memory is owned by the
1282 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1286 LOCK_THREAD (this_obj);
1288 if (!this_obj->name) {
1292 *name_len = this_obj->name_len;
1293 res = g_new (gunichar2, this_obj->name_len);
1294 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1297 UNLOCK_THREAD (this_obj);
1303 * mono_thread_get_name_utf8:
1305 * Return the name of the thread in UTF-8.
1306 * Return NULL if the thread has no name.
1307 * The returned memory is owned by the caller.
1310 mono_thread_get_name_utf8 (MonoThread *thread)
1315 MonoInternalThread *internal = thread->internal_thread;
1316 if (internal == NULL)
1319 LOCK_THREAD (internal);
1321 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1323 UNLOCK_THREAD (internal);
1329 * mono_thread_get_managed_id:
1331 * Return the Thread.ManagedThreadId value of `thread`.
1332 * Returns -1 if `thread` is NULL.
1335 mono_thread_get_managed_id (MonoThread *thread)
1340 MonoInternalThread *internal = thread->internal_thread;
1341 if (internal == NULL)
1344 int32_t id = internal->managed_id;
1350 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1355 mono_error_init (&error);
1357 LOCK_THREAD (this_obj);
1359 if (!this_obj->name)
1362 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1364 UNLOCK_THREAD (this_obj);
1366 mono_error_raise_exception (&error);
1372 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1374 LOCK_THREAD (this_obj);
1376 mono_error_init (error);
1378 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1379 UNLOCK_THREAD (this_obj);
1381 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1384 if (this_obj->name) {
1385 g_free (this_obj->name);
1386 this_obj->name_len = 0;
1389 this_obj->name = g_new (gunichar2, mono_string_length (name));
1390 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1391 this_obj->name_len = mono_string_length (name);
1394 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1397 this_obj->name = NULL;
1400 UNLOCK_THREAD (this_obj);
1402 if (this_obj->name && this_obj->tid) {
1403 char *tname = mono_string_to_utf8 (name);
1404 mono_profiler_thread_name (this_obj->tid, tname);
1405 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1411 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1414 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1415 mono_error_set_pending_exception (&error);
1419 * ves_icall_System_Threading_Thread_GetPriority_internal:
1420 * @param this_obj: The MonoInternalThread on which to operate.
1422 * Gets the priority of the given thread.
1423 * @return: The priority of the given thread.
1426 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1429 MonoInternalThread *internal = this_obj->internal_thread;
1431 LOCK_THREAD (internal);
1432 priority = GetThreadPriority (internal->handle) + 2;
1433 UNLOCK_THREAD (internal);
1438 * ves_icall_System_Threading_Thread_SetPriority_internal:
1439 * @param this_obj: The MonoInternalThread on which to operate.
1440 * @param priority: The priority to set.
1442 * Sets the priority of the given thread.
1445 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1447 MonoInternalThread *internal = this_obj->internal_thread;
1449 LOCK_THREAD (internal);
1450 SetThreadPriority (internal->handle, priority - 2);
1451 UNLOCK_THREAD (internal);
1454 /* If the array is already in the requested domain, we just return it,
1455 otherwise we return a copy in that domain. */
1457 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1461 mono_error_init (error);
1465 if (mono_object_domain (arr) == domain)
1468 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1469 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1474 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1477 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1478 mono_error_set_pending_exception (&error);
1483 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1486 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1487 mono_error_set_pending_exception (&error);
1492 mono_thread_current (void)
1495 MonoDomain *domain = mono_domain_get ();
1496 MonoInternalThread *internal = mono_thread_internal_current ();
1497 MonoThread **current_thread_ptr;
1499 g_assert (internal);
1500 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1502 if (!*current_thread_ptr) {
1503 g_assert (domain != mono_get_root_domain ());
1504 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1505 mono_error_raise_exception (&error); /* FIXME don't raise here */
1507 return *current_thread_ptr;
1510 /* Return the thread object belonging to INTERNAL in the current domain */
1512 mono_thread_current_for_thread (MonoInternalThread *internal)
1515 MonoDomain *domain = mono_domain_get ();
1516 MonoThread **current_thread_ptr;
1518 g_assert (internal);
1519 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1521 if (!*current_thread_ptr) {
1522 g_assert (domain != mono_get_root_domain ());
1523 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1524 mono_error_raise_exception (&error); /* FIXME don't raise here */
1526 return *current_thread_ptr;
1530 mono_thread_internal_current (void)
1532 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1533 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1538 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1540 MonoInternalThread *thread = this_obj->internal_thread;
1541 HANDLE handle = thread->handle;
1542 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1545 if (mono_thread_current_check_pending_interrupt ())
1548 LOCK_THREAD (thread);
1550 if ((thread->state & ThreadState_Unstarted) != 0) {
1551 UNLOCK_THREAD (thread);
1553 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1557 UNLOCK_THREAD (thread);
1562 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1564 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1567 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1570 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1572 if(ret==WAIT_OBJECT_0) {
1573 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1578 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1584 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1592 mono_error_init (error);
1594 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1597 if (numhandles != 1)
1598 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE);
1600 ret = WaitForSingleObjectEx (handles [0], ms, TRUE);
1603 if (ret != WAIT_IO_COMPLETION)
1606 exc = mono_thread_execute_interruption ();
1608 mono_error_set_exception_instance (error, exc);
1615 /* Re-calculate ms according to the time passed */
1616 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1617 if (diff_ms >= ms) {
1621 wait = ms - diff_ms;
1627 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1634 MonoObject *waitHandle;
1635 MonoInternalThread *thread = mono_thread_internal_current ();
1637 /* Do this WaitSleepJoin check before creating objects */
1638 if (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, numhandles, handles, TRUE, ms, &error);
1658 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1662 mono_error_set_pending_exception (&error);
1664 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1665 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1668 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1671 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1672 uintptr_t numhandles;
1675 MonoObject *waitHandle;
1676 MonoInternalThread *thread = mono_thread_internal_current ();
1678 /* Do this WaitSleepJoin check before creating objects */
1679 if (mono_thread_current_check_pending_interrupt ())
1682 numhandles = mono_array_length(mono_handles);
1683 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1686 for(i = 0; i < numhandles; i++) {
1687 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1688 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1695 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1697 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1699 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1701 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1703 mono_error_set_pending_exception (&error);
1705 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1707 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1708 return ret - WAIT_OBJECT_0;
1710 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1711 return ret - WAIT_ABANDONED_0;
1714 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1715 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1719 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1723 MonoInternalThread *thread = mono_thread_internal_current ();
1725 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1731 if (mono_thread_current_check_pending_interrupt ())
1734 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1736 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1738 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1740 mono_error_set_pending_exception (&error);
1741 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1742 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1746 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1749 MonoInternalThread *thread = mono_thread_internal_current ();
1754 if (mono_thread_current_check_pending_interrupt ())
1757 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1760 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1763 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1765 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1766 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1769 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1776 mutex = CreateMutex (NULL, owned, NULL);
1778 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1780 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1788 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1789 return(ReleaseMutex (handle));
1792 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1798 *error = ERROR_SUCCESS;
1800 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1802 *error = GetLastError ();
1809 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1816 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1818 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1819 mono_string_chars (name));
1821 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1829 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1833 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1838 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1842 *error = ERROR_SUCCESS;
1844 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1846 *error = GetLastError ();
1852 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1859 event = CreateEvent (NULL, manual, initial, NULL);
1861 event = CreateEvent (NULL, manual, initial,
1862 mono_string_chars (name));
1864 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1872 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1873 return (SetEvent(handle));
1876 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1877 return (ResetEvent(handle));
1881 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1882 CloseHandle (handle);
1885 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1891 *error = ERROR_SUCCESS;
1893 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1895 *error = GetLastError ();
1901 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1903 return InterlockedIncrement (location);
1906 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1908 #if SIZEOF_VOID_P == 4
1909 if (G_UNLIKELY ((size_t)location & 0x7)) {
1911 mono_interlocked_lock ();
1914 mono_interlocked_unlock ();
1918 return InterlockedIncrement64 (location);
1921 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1923 return InterlockedDecrement(location);
1926 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1928 #if SIZEOF_VOID_P == 4
1929 if (G_UNLIKELY ((size_t)location & 0x7)) {
1931 mono_interlocked_lock ();
1934 mono_interlocked_unlock ();
1938 return InterlockedDecrement64 (location);
1941 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1943 return InterlockedExchange(location, value);
1946 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1949 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1950 mono_gc_wbarrier_generic_nostore (location);
1954 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1956 return InterlockedExchangePointer(location, value);
1959 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1961 IntFloatUnion val, ret;
1964 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1970 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1972 #if SIZEOF_VOID_P == 4
1973 if (G_UNLIKELY ((size_t)location & 0x7)) {
1975 mono_interlocked_lock ();
1978 mono_interlocked_unlock ();
1982 return InterlockedExchange64 (location, value);
1986 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1988 LongDoubleUnion val, ret;
1991 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1996 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1998 return InterlockedCompareExchange(location, value, comparand);
2001 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2003 gint32 r = InterlockedCompareExchange(location, value, comparand);
2004 *success = r == comparand;
2008 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2011 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2012 mono_gc_wbarrier_generic_nostore (location);
2016 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2018 return InterlockedCompareExchangePointer(location, value, comparand);
2021 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2023 IntFloatUnion val, ret, cmp;
2026 cmp.fval = comparand;
2027 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2033 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2035 #if SIZEOF_VOID_P == 8
2036 LongDoubleUnion val, comp, ret;
2039 comp.fval = comparand;
2040 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2046 mono_interlocked_lock ();
2048 if (old == comparand)
2050 mono_interlocked_unlock ();
2057 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2059 #if SIZEOF_VOID_P == 4
2060 if (G_UNLIKELY ((size_t)location & 0x7)) {
2062 mono_interlocked_lock ();
2064 if (old == comparand)
2066 mono_interlocked_unlock ();
2070 return InterlockedCompareExchange64 (location, value, comparand);
2074 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2077 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2078 mono_gc_wbarrier_generic_nostore (location);
2083 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2086 MONO_CHECK_NULL (location, NULL);
2087 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2088 mono_gc_wbarrier_generic_nostore (location);
2093 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2095 return InterlockedAdd (location, value);
2099 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2101 #if SIZEOF_VOID_P == 4
2102 if (G_UNLIKELY ((size_t)location & 0x7)) {
2104 mono_interlocked_lock ();
2107 mono_interlocked_unlock ();
2111 return InterlockedAdd64 (location, value);
2115 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2117 #if SIZEOF_VOID_P == 4
2118 if (G_UNLIKELY ((size_t)location & 0x7)) {
2120 mono_interlocked_lock ();
2122 mono_interlocked_unlock ();
2126 return InterlockedRead64 (location);
2130 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2132 mono_memory_barrier ();
2136 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2138 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2140 if (state & ThreadState_Background) {
2141 /* If the thread changes the background mode, the main thread has to
2142 * be notified, since it has to rebuild the list of threads to
2145 SetEvent (background_change_event);
2150 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2152 mono_thread_set_state (this_obj, (MonoThreadState)state);
2154 if (state & ThreadState_Background) {
2155 /* If the thread changes the background mode, the main thread has to
2156 * be notified, since it has to rebuild the list of threads to
2159 SetEvent (background_change_event);
2164 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2168 LOCK_THREAD (this_obj);
2170 state = this_obj->state;
2172 UNLOCK_THREAD (this_obj);
2177 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2179 MonoInternalThread *current;
2181 MonoInternalThread *thread = this_obj->internal_thread;
2183 LOCK_THREAD (thread);
2185 current = mono_thread_internal_current ();
2187 thread->thread_interrupt_requested = TRUE;
2188 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2190 UNLOCK_THREAD (thread);
2193 async_abort_internal (thread, FALSE);
2198 * mono_thread_current_check_pending_interrupt:
2200 * Checks if there's a interruption request and set the pending exception if so.
2202 * @returns true if a pending exception was set
2205 mono_thread_current_check_pending_interrupt (void)
2207 MonoInternalThread *thread = mono_thread_internal_current ();
2208 gboolean throw_ = FALSE;
2210 LOCK_THREAD (thread);
2212 if (thread->thread_interrupt_requested) {
2214 thread->thread_interrupt_requested = FALSE;
2217 UNLOCK_THREAD (thread);
2220 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2225 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2227 LOCK_THREAD (thread);
2229 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2230 (thread->state & ThreadState_StopRequested) != 0 ||
2231 (thread->state & ThreadState_Stopped) != 0)
2233 UNLOCK_THREAD (thread);
2237 if ((thread->state & ThreadState_Unstarted) != 0) {
2238 thread->state |= ThreadState_Aborted;
2239 UNLOCK_THREAD (thread);
2243 thread->state |= ThreadState_AbortRequested;
2244 if (thread->abort_state_handle)
2245 mono_gchandle_free (thread->abort_state_handle);
2247 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2248 g_assert (thread->abort_state_handle);
2250 thread->abort_state_handle = 0;
2252 thread->abort_exc = NULL;
2254 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));
2256 /* During shutdown, we can't wait for other threads */
2258 /* Make sure the thread is awake */
2259 mono_thread_resume (thread);
2261 UNLOCK_THREAD (thread);
2266 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2268 if (!request_thread_abort (thread, state))
2271 if (thread == mono_thread_internal_current ())
2272 self_abort_internal ();
2274 async_abort_internal (thread, TRUE);
2278 * mono_thread_internal_abort:
2280 * Request thread @thread to be aborted.
2282 * @thread MUST NOT be the current thread.
2285 mono_thread_internal_abort (MonoInternalThread *thread)
2287 g_assert (thread != mono_thread_internal_current ());
2289 if (!request_thread_abort (thread, NULL))
2291 async_abort_internal (thread, TRUE);
2295 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2297 MonoInternalThread *thread = mono_thread_internal_current ();
2298 gboolean was_aborting;
2300 LOCK_THREAD (thread);
2301 was_aborting = thread->state & ThreadState_AbortRequested;
2302 thread->state &= ~ThreadState_AbortRequested;
2303 UNLOCK_THREAD (thread);
2305 if (!was_aborting) {
2306 const char *msg = "Unable to reset abort because no abort was requested";
2307 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2310 thread->abort_exc = NULL;
2311 if (thread->abort_state_handle) {
2312 mono_gchandle_free (thread->abort_state_handle);
2313 /* This is actually not necessary - the handle
2314 only counts if the exception is set */
2315 thread->abort_state_handle = 0;
2320 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2322 LOCK_THREAD (thread);
2324 thread->state &= ~ThreadState_AbortRequested;
2326 if (thread->abort_exc) {
2327 thread->abort_exc = NULL;
2328 if (thread->abort_state_handle) {
2329 mono_gchandle_free (thread->abort_state_handle);
2330 /* This is actually not necessary - the handle
2331 only counts if the exception is set */
2332 thread->abort_state_handle = 0;
2336 UNLOCK_THREAD (thread);
2340 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2343 MonoInternalThread *thread = this_obj->internal_thread;
2344 MonoObject *state, *deserialized = NULL;
2347 if (!thread->abort_state_handle)
2350 state = mono_gchandle_get_target (thread->abort_state_handle);
2353 domain = mono_domain_get ();
2354 if (mono_object_domain (state) == domain)
2357 deserialized = mono_object_xdomain_representation (state, domain, &error);
2359 if (!deserialized) {
2360 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2361 if (!is_ok (&error)) {
2362 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2363 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2365 mono_set_pending_exception (invalid_op_exc);
2369 return deserialized;
2373 mono_thread_suspend (MonoInternalThread *thread)
2375 LOCK_THREAD (thread);
2377 if ((thread->state & ThreadState_Unstarted) != 0 ||
2378 (thread->state & ThreadState_Aborted) != 0 ||
2379 (thread->state & ThreadState_Stopped) != 0)
2381 UNLOCK_THREAD (thread);
2385 if ((thread->state & ThreadState_Suspended) != 0 ||
2386 (thread->state & ThreadState_SuspendRequested) != 0 ||
2387 (thread->state & ThreadState_StopRequested) != 0)
2389 UNLOCK_THREAD (thread);
2393 thread->state |= ThreadState_SuspendRequested;
2395 if (thread == mono_thread_internal_current ()) {
2396 /* calls UNLOCK_THREAD (thread) */
2397 self_suspend_internal ();
2399 /* calls UNLOCK_THREAD (thread) */
2400 async_suspend_internal (thread, FALSE);
2407 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2409 if (!mono_thread_suspend (this_obj->internal_thread)) {
2410 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2415 /* LOCKING: LOCK_THREAD(thread) must be held */
2417 mono_thread_resume (MonoInternalThread *thread)
2419 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2420 thread->state &= ~ThreadState_SuspendRequested;
2424 if ((thread->state & ThreadState_Suspended) == 0 ||
2425 (thread->state & ThreadState_Unstarted) != 0 ||
2426 (thread->state & ThreadState_Aborted) != 0 ||
2427 (thread->state & ThreadState_Stopped) != 0)
2432 UNLOCK_THREAD (thread);
2434 /* Awake the thread */
2435 if (!mono_thread_info_resume (thread_get_tid (thread)))
2438 LOCK_THREAD (thread);
2440 thread->state &= ~ThreadState_Suspended;
2446 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2448 if (!thread->internal_thread) {
2449 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2451 LOCK_THREAD (thread->internal_thread);
2452 if (!mono_thread_resume (thread->internal_thread))
2453 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2454 UNLOCK_THREAD (thread->internal_thread);
2459 mono_threads_is_critical_method (MonoMethod *method)
2461 switch (method->wrapper_type) {
2462 case MONO_WRAPPER_RUNTIME_INVOKE:
2463 case MONO_WRAPPER_XDOMAIN_INVOKE:
2464 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2471 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2476 if (mono_threads_is_critical_method (m)) {
2477 *((gboolean*)data) = TRUE;
2484 is_running_protected_wrapper (void)
2486 gboolean found = FALSE;
2487 mono_stack_walk (find_wrapper, &found);
2491 void mono_thread_internal_stop (MonoInternalThread *thread)
2493 LOCK_THREAD (thread);
2495 if ((thread->state & ThreadState_StopRequested) != 0 ||
2496 (thread->state & ThreadState_Stopped) != 0)
2498 UNLOCK_THREAD (thread);
2502 /* Make sure the thread is awake */
2503 mono_thread_resume (thread);
2505 thread->state |= ThreadState_StopRequested;
2506 thread->state &= ~ThreadState_AbortRequested;
2508 UNLOCK_THREAD (thread);
2510 if (thread == mono_thread_internal_current ())
2511 self_abort_internal ();
2513 async_abort_internal (thread, TRUE);
2516 void mono_thread_stop (MonoThread *thread)
2518 mono_thread_internal_stop (thread->internal_thread);
2522 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2524 gint8 tmp = *(volatile gint8 *)ptr;
2525 mono_memory_barrier ();
2530 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2532 gint16 tmp = *(volatile gint16 *)ptr;
2533 mono_memory_barrier ();
2538 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2540 gint32 tmp = *(volatile gint32 *)ptr;
2541 mono_memory_barrier ();
2546 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2548 gint64 tmp = *(volatile gint64 *)ptr;
2549 mono_memory_barrier ();
2554 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2556 volatile void *tmp = *(volatile void **)ptr;
2557 mono_memory_barrier ();
2558 return (void *) tmp;
2562 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2564 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2565 mono_memory_barrier ();
2566 return (MonoObject *) tmp;
2570 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2572 double tmp = *(volatile double *)ptr;
2573 mono_memory_barrier ();
2578 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2580 float tmp = *(volatile float *)ptr;
2581 mono_memory_barrier ();
2586 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2588 return InterlockedRead8 ((volatile gint8 *)ptr);
2592 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2594 return InterlockedRead16 ((volatile gint16 *)ptr);
2598 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2600 return InterlockedRead ((volatile gint32 *)ptr);
2604 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2606 #if SIZEOF_VOID_P == 4
2607 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2609 mono_interlocked_lock ();
2610 val = *(gint64*)ptr;
2611 mono_interlocked_unlock ();
2615 return InterlockedRead64 ((volatile gint64 *)ptr);
2619 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2621 return InterlockedReadPointer ((volatile gpointer *)ptr);
2625 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2629 #if SIZEOF_VOID_P == 4
2630 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2632 mono_interlocked_lock ();
2633 val = *(double*)ptr;
2634 mono_interlocked_unlock ();
2639 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2645 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2649 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2655 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2657 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2661 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2663 mono_memory_barrier ();
2664 *(volatile gint8 *)ptr = value;
2668 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2670 mono_memory_barrier ();
2671 *(volatile gint16 *)ptr = value;
2675 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2677 mono_memory_barrier ();
2678 *(volatile gint32 *)ptr = value;
2682 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2684 mono_memory_barrier ();
2685 *(volatile gint64 *)ptr = value;
2689 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2691 mono_memory_barrier ();
2692 *(volatile void **)ptr = value;
2696 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2698 mono_memory_barrier ();
2699 mono_gc_wbarrier_generic_store (ptr, value);
2703 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2705 mono_memory_barrier ();
2706 *(volatile double *)ptr = value;
2710 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2712 mono_memory_barrier ();
2713 *(volatile float *)ptr = value;
2717 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2719 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2723 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2725 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2729 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2731 InterlockedWrite ((volatile gint32 *)ptr, value);
2735 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2737 #if SIZEOF_VOID_P == 4
2738 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2739 mono_interlocked_lock ();
2740 *(gint64*)ptr = value;
2741 mono_interlocked_unlock ();
2746 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2750 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2752 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2756 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2760 #if SIZEOF_VOID_P == 4
2761 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2762 mono_interlocked_lock ();
2763 *(double*)ptr = value;
2764 mono_interlocked_unlock ();
2771 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2775 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2781 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2785 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2787 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2791 free_context (void *user_data)
2793 ContextStaticData *data = user_data;
2795 mono_threads_lock ();
2798 * There is no guarantee that, by the point this reference queue callback
2799 * has been invoked, the GC handle associated with the object will fail to
2800 * resolve as one might expect. So if we don't free and remove the GC
2801 * handle here, free_context_static_data_helper () could end up resolving
2802 * a GC handle to an actually-dead context which would contain a pointer
2803 * to an already-freed static data segment, resulting in a crash when
2806 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2808 mono_threads_unlock ();
2810 mono_gchandle_free (data->gc_handle);
2811 mono_free_static_data (data->static_data);
2816 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2818 mono_threads_lock ();
2820 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2823 contexts = g_hash_table_new (NULL, NULL);
2826 context_queue = mono_gc_reference_queue_new (free_context);
2828 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2829 g_hash_table_insert (contexts, gch, gch);
2832 * We use this intermediate structure to contain a duplicate pointer to
2833 * the static data because we can't rely on being able to resolve the GC
2834 * handle in the reference queue callback.
2836 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2837 data->gc_handle = GPOINTER_TO_UINT (gch);
2840 context_adjust_static_data (ctx);
2841 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2843 mono_threads_unlock ();
2845 mono_profiler_context_loaded (ctx);
2849 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2852 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2853 * cleanup in exceptional circumstances, we don't actually do any
2854 * cleanup work here. We instead do this via a reference queue.
2857 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2859 mono_profiler_context_unloaded (ctx);
2863 mono_thread_init_tls (void)
2865 MONO_FAST_TLS_INIT (tls_current_object);
2866 mono_native_tls_alloc (¤t_object_key, NULL);
2869 void mono_thread_init (MonoThreadStartCB start_cb,
2870 MonoThreadAttachCB attach_cb)
2872 mono_coop_mutex_init_recursive (&threads_mutex);
2874 mono_os_mutex_init_recursive(&interlocked_mutex);
2875 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2877 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2878 g_assert(background_change_event != NULL);
2880 mono_init_static_data_info (&thread_static_info);
2881 mono_init_static_data_info (&context_static_info);
2883 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2885 mono_thread_start_cb = start_cb;
2886 mono_thread_attach_cb = attach_cb;
2888 /* Get a pseudo handle to the current process. This is just a
2889 * kludge so that wapi can build a process handle if needed.
2890 * As a pseudo handle is returned, we don't need to clean
2893 GetCurrentProcess ();
2896 void mono_thread_cleanup (void)
2898 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2899 MonoThreadInfo *info;
2901 /* The main thread must abandon any held mutexes (particularly
2902 * important for named mutexes as they are shared across
2903 * processes, see bug 74680.) This will happen when the
2904 * thread exits, but if it's not running in a subthread it
2905 * won't exit in time.
2907 info = mono_thread_info_current ();
2908 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2912 /* This stuff needs more testing, it seems one of these
2913 * critical sections can be locked when mono_thread_cleanup is
2916 mono_coop_mutex_destroy (&threads_mutex);
2917 mono_os_mutex_destroy (&interlocked_mutex);
2918 mono_os_mutex_destroy (&delayed_free_table_mutex);
2919 mono_os_mutex_destroy (&small_id_mutex);
2920 CloseHandle (background_change_event);
2923 mono_native_tls_free (current_object_key);
2927 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2929 mono_thread_cleanup_fn = func;
2933 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2935 thread->internal_thread->manage_callback = func;
2939 static void print_tids (gpointer key, gpointer value, gpointer user)
2941 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2942 * sizeof(uint) and a cast to uint would overflow
2944 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2945 * print this as a pointer.
2947 g_message ("Waiting for: %p", key);
2952 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2953 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2957 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2961 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2964 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2967 if(ret==WAIT_FAILED) {
2968 /* See the comment in build_wait_tids() */
2969 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2973 for(i=0; i<wait->num; i++)
2974 CloseHandle (wait->handles[i]);
2976 if (ret == WAIT_TIMEOUT)
2979 for(i=0; i<wait->num; i++) {
2980 gsize tid = wait->threads[i]->tid;
2983 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2984 * it can still run io-layer etc. code. So wait for it to really exit.
2985 * FIXME: This won't join threads which are not in the joinable_hash yet.
2987 mono_thread_join ((gpointer)tid);
2989 mono_threads_lock ();
2990 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2991 /* This thread must have been killed, because
2992 * it hasn't cleaned itself up. (It's just
2993 * possible that the thread exited before the
2994 * parent thread had a chance to store the
2995 * handle, and now there is another pointer to
2996 * the already-exited thread stored. In this
2997 * case, we'll just get two
2998 * mono_profiler_thread_end() calls for the
3002 mono_threads_unlock ();
3003 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
3004 thread_cleanup (wait->threads[i]);
3006 mono_threads_unlock ();
3011 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
3013 guint32 i, ret, count;
3015 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3017 /* Add the thread state change event, so it wakes up if a thread changes
3018 * to background mode.
3021 if (count < MAXIMUM_WAIT_OBJECTS) {
3022 wait->handles [count] = background_change_event;
3027 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
3030 if(ret==WAIT_FAILED) {
3031 /* See the comment in build_wait_tids() */
3032 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3036 for(i=0; i<wait->num; i++)
3037 CloseHandle (wait->handles[i]);
3039 if (ret == WAIT_TIMEOUT)
3042 if (ret < wait->num) {
3043 gsize tid = wait->threads[ret]->tid;
3044 mono_threads_lock ();
3045 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3046 /* See comment in wait_for_tids about thread cleanup */
3047 mono_threads_unlock ();
3048 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
3049 thread_cleanup (wait->threads [ret]);
3051 mono_threads_unlock ();
3055 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3057 struct wait_data *wait=(struct wait_data *)user;
3059 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
3061 MonoInternalThread *thread=(MonoInternalThread *)value;
3063 /* Ignore background threads, we abort them later */
3064 /* Do not lock here since it is not needed and the caller holds threads_lock */
3065 if (thread->state & ThreadState_Background) {
3066 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3067 return; /* just leave, ignore */
3070 if (mono_gc_is_finalizer_internal_thread (thread)) {
3071 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3075 if (thread == mono_thread_internal_current ()) {
3076 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3080 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3081 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3085 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3086 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3090 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3091 if (handle == NULL) {
3092 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3096 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3097 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3098 wait->handles[wait->num]=handle;
3099 wait->threads[wait->num]=thread;
3102 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3104 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3109 /* Just ignore the rest, we can't do anything with
3116 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3118 struct wait_data *wait=(struct wait_data *)user;
3119 MonoNativeThreadId self = mono_native_thread_id_get ();
3120 MonoInternalThread *thread = (MonoInternalThread *)value;
3123 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3126 /* The finalizer thread is not a background thread */
3127 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3128 && (thread->state & ThreadState_Background) != 0
3129 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3131 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3135 /* printf ("A: %d\n", wait->num); */
3136 wait->handles[wait->num]=thread->handle;
3137 wait->threads[wait->num]=thread;
3140 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3141 mono_thread_internal_stop (thread);
3145 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3146 && !mono_gc_is_finalizer_internal_thread (thread);
3150 * mono_threads_set_shutting_down:
3152 * Is called by a thread that wants to shut down Mono. If the runtime is already
3153 * shutting down, the calling thread is suspended/stopped, and this function never
3157 mono_threads_set_shutting_down (void)
3159 MonoInternalThread *current_thread = mono_thread_internal_current ();
3161 mono_threads_lock ();
3163 if (shutting_down) {
3164 mono_threads_unlock ();
3166 /* Make sure we're properly suspended/stopped */
3168 LOCK_THREAD (current_thread);
3170 if ((current_thread->state & ThreadState_SuspendRequested) ||
3171 (current_thread->state & ThreadState_AbortRequested) ||
3172 (current_thread->state & ThreadState_StopRequested)) {
3173 UNLOCK_THREAD (current_thread);
3174 mono_thread_execute_interruption ();
3176 current_thread->state |= ThreadState_Stopped;
3177 UNLOCK_THREAD (current_thread);
3180 /*since we're killing the thread, unset the current domain.*/
3181 mono_domain_unset ();
3183 /* Wake up other threads potentially waiting for us */
3184 mono_thread_info_exit ();
3186 shutting_down = TRUE;
3188 /* Not really a background state change, but this will
3189 * interrupt the main thread if it is waiting for all
3190 * the other threads.
3192 SetEvent (background_change_event);
3194 mono_threads_unlock ();
3198 void mono_thread_manage (void)
3200 struct wait_data wait_data;
3201 struct wait_data *wait = &wait_data;
3203 memset (wait, 0, sizeof (struct wait_data));
3204 /* join each thread that's still running */
3205 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3207 mono_threads_lock ();
3209 THREAD_DEBUG (g_message("%s: No threads", __func__));
3210 mono_threads_unlock ();
3213 mono_threads_unlock ();
3216 mono_threads_lock ();
3217 if (shutting_down) {
3218 /* somebody else is shutting down */
3219 mono_threads_unlock ();
3222 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3223 mono_g_hash_table_foreach (threads, print_tids, NULL));
3225 ResetEvent (background_change_event);
3227 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3228 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3229 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3230 mono_threads_unlock ();
3232 /* Something to wait for */
3233 wait_for_tids_or_state_change (wait, INFINITE);
3235 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3236 } while(wait->num>0);
3238 /* Mono is shutting down, so just wait for the end */
3239 if (!mono_runtime_try_shutdown ()) {
3240 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3241 mono_thread_suspend (mono_thread_internal_current ());
3242 mono_thread_execute_interruption ();
3246 * Remove everything but the finalizer thread and self.
3247 * Also abort all the background threads
3250 mono_threads_lock ();
3253 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3254 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3255 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3257 mono_threads_unlock ();
3259 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3261 /* Something to wait for */
3262 wait_for_tids (wait, INFINITE);
3264 } while (wait->num > 0);
3267 * give the subthreads a chance to really quit (this is mainly needed
3268 * to get correct user and system times from getrusage/wait/time(1)).
3269 * This could be removed if we avoid pthread_detach() and use pthread_join().
3271 mono_thread_info_yield ();
3275 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3277 MonoInternalThread *thread = (MonoInternalThread*)value;
3278 struct wait_data *wait = (struct wait_data*)user_data;
3282 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3284 * This needs no locking.
3286 if ((thread->state & ThreadState_Suspended) != 0 ||
3287 (thread->state & ThreadState_Stopped) != 0)
3290 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3291 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3295 wait->handles [wait->num] = handle;
3296 wait->threads [wait->num] = thread;
3302 * mono_thread_suspend_all_other_threads:
3304 * Suspend all managed threads except the finalizer thread and this thread. It is
3305 * not possible to resume them later.
3307 void mono_thread_suspend_all_other_threads (void)
3309 struct wait_data wait_data;
3310 struct wait_data *wait = &wait_data;
3312 MonoNativeThreadId self = mono_native_thread_id_get ();
3313 guint32 eventidx = 0;
3314 gboolean starting, finished;
3316 memset (wait, 0, sizeof (struct wait_data));
3318 * The other threads could be in an arbitrary state at this point, i.e.
3319 * they could be starting up, shutting down etc. This means that there could be
3320 * threads which are not even in the threads hash table yet.
3324 * First we set a barrier which will be checked by all threads before they
3325 * are added to the threads hash table, and they will exit if the flag is set.
3326 * This ensures that no threads could be added to the hash later.
3327 * We will use shutting_down as the barrier for now.
3329 g_assert (shutting_down);
3332 * We make multiple calls to WaitForMultipleObjects since:
3333 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3334 * - some threads could exit without becoming suspended
3339 * Make a copy of the hashtable since we can't do anything with
3340 * threads while threads_mutex is held.
3343 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3344 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3345 mono_threads_lock ();
3346 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3347 mono_threads_unlock ();
3350 /* Get the suspended events that we'll be waiting for */
3351 for (i = 0; i < wait->num; ++i) {
3352 MonoInternalThread *thread = wait->threads [i];
3354 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3355 || mono_gc_is_finalizer_internal_thread (thread)
3356 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3358 //CloseHandle (wait->handles [i]);
3359 wait->threads [i] = NULL; /* ignore this thread in next loop */
3363 LOCK_THREAD (thread);
3365 if ((thread->state & ThreadState_Suspended) != 0 ||
3366 (thread->state & ThreadState_StopRequested) != 0 ||
3367 (thread->state & ThreadState_Stopped) != 0) {
3368 UNLOCK_THREAD (thread);
3369 CloseHandle (wait->handles [i]);
3370 wait->threads [i] = NULL; /* ignore this thread in next loop */
3376 /* Convert abort requests into suspend requests */
3377 if ((thread->state & ThreadState_AbortRequested) != 0)
3378 thread->state &= ~ThreadState_AbortRequested;
3380 thread->state |= ThreadState_SuspendRequested;
3382 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3383 async_suspend_internal (thread, TRUE);
3385 if (eventidx <= 0) {
3387 * If there are threads which are starting up, we wait until they
3388 * are suspended when they try to register in the threads hash.
3389 * This is guaranteed to finish, since the threads which can create new
3390 * threads get suspended after a while.
3391 * FIXME: The finalizer thread can still create new threads.
3393 mono_threads_lock ();
3394 if (threads_starting_up)
3395 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3398 mono_threads_unlock ();
3400 mono_thread_info_sleep (100, NULL);
3408 MonoInternalThread *thread;
3409 MonoStackFrameInfo *frames;
3410 int nframes, max_frames;
3411 int nthreads, max_threads;
3412 MonoInternalThread **threads;
3413 } ThreadDumpUserData;
3415 static gboolean thread_dump_requested;
3417 /* This needs to be async safe */
3419 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3421 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3423 if (ud->nframes < ud->max_frames) {
3424 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3431 /* This needs to be async safe */
3432 static SuspendThreadResult
3433 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3435 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3436 MonoInternalThread *thread = user_data->thread;
3439 /* This no longer works with remote unwinding */
3441 wapi_desc = wapi_current_thread_desc ();
3442 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3447 if (thread == mono_thread_internal_current ())
3448 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3450 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3452 return MonoResumeThread;
3456 int nthreads, max_threads;
3457 MonoInternalThread **threads;
3458 } CollectThreadsUserData;
3461 collect_thread (gpointer key, gpointer value, gpointer user)
3463 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3464 MonoInternalThread *thread = (MonoInternalThread *)value;
3466 if (ud->nthreads < ud->max_threads)
3467 ud->threads [ud->nthreads ++] = thread;
3471 * Collect running threads into the THREADS array.
3472 * THREADS should be an array allocated on the stack.
3475 collect_threads (MonoInternalThread **thread_array, int max_threads)
3477 CollectThreadsUserData ud;
3479 memset (&ud, 0, sizeof (ud));
3480 /* This array contains refs, but its on the stack, so its ok */
3481 ud.threads = thread_array;
3482 ud.max_threads = max_threads;
3484 mono_threads_lock ();
3485 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3486 mono_threads_unlock ();
3492 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3494 GString* text = g_string_new (0);
3496 GError *error = NULL;
3499 ud->thread = thread;
3502 /* Collect frames for the thread */
3503 if (thread == mono_thread_internal_current ()) {
3504 get_thread_dump (mono_thread_info_current (), ud);
3506 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3510 * Do all the non async-safe work outside of get_thread_dump.
3513 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3515 g_string_append_printf (text, "\n\"%s\"", name);
3518 else if (thread->threadpool_thread) {
3519 g_string_append (text, "\n\"<threadpool thread>\"");
3521 g_string_append (text, "\n\"<unnamed thread>\"");
3524 for (i = 0; i < ud->nframes; ++i) {
3525 MonoStackFrameInfo *frame = &ud->frames [i];
3526 MonoMethod *method = NULL;
3528 if (frame->type == FRAME_TYPE_MANAGED)
3529 method = mono_jit_info_get_method (frame->ji);
3532 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3533 g_string_append_printf (text, " %s\n", location);
3536 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3540 fprintf (stdout, "%s", text->str);
3542 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3543 OutputDebugStringA(text->str);
3546 g_string_free (text, TRUE);
3551 mono_threads_perform_thread_dump (void)
3553 ThreadDumpUserData ud;
3554 MonoInternalThread *thread_array [128];
3555 int tindex, nthreads;
3557 if (!thread_dump_requested)
3560 printf ("Full thread dump:\n");
3562 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3563 nthreads = collect_threads (thread_array, 128);
3565 memset (&ud, 0, sizeof (ud));
3566 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3567 ud.max_frames = 256;
3569 for (tindex = 0; tindex < nthreads; ++tindex)
3570 dump_thread (thread_array [tindex], &ud);
3574 thread_dump_requested = FALSE;
3577 /* Obtain the thread dump of all threads */
3579 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3583 ThreadDumpUserData ud;
3584 MonoInternalThread *thread_array [128];
3585 MonoDomain *domain = mono_domain_get ();
3586 MonoDebugSourceLocation *location;
3587 int tindex, nthreads;
3589 mono_error_init (&error);
3591 *out_threads = NULL;
3592 *out_stack_frames = NULL;
3594 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3595 nthreads = collect_threads (thread_array, 128);
3597 memset (&ud, 0, sizeof (ud));
3598 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3599 ud.max_frames = 256;
3601 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, &error);
3602 if (!is_ok (&error))
3604 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, &error);
3605 if (!is_ok (&error))
3608 for (tindex = 0; tindex < nthreads; ++tindex) {
3609 MonoInternalThread *thread = thread_array [tindex];
3610 MonoArray *thread_frames;
3616 /* Collect frames for the thread */
3617 if (thread == mono_thread_internal_current ()) {
3618 get_thread_dump (mono_thread_info_current (), &ud);
3620 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3623 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3625 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, &error);
3626 if (!is_ok (&error))
3628 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3630 for (i = 0; i < ud.nframes; ++i) {
3631 MonoStackFrameInfo *frame = &ud.frames [i];
3632 MonoMethod *method = NULL;
3633 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3634 if (!mono_error_ok (&error))
3637 sf->native_offset = frame->native_offset;
3639 if (frame->type == FRAME_TYPE_MANAGED)
3640 method = mono_jit_info_get_method (frame->ji);
3643 sf->method_address = (gsize) frame->ji->code_start;
3645 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3646 mono_error_raise_exception (&error); /* FIXME don't raise here */
3647 MONO_OBJECT_SETREF (sf, method, rm);
3649 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3651 sf->il_offset = location->il_offset;
3653 if (location && location->source_file) {
3654 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3655 sf->line = location->row;
3656 sf->column = location->column;
3658 mono_debug_free_source_location (location);
3663 mono_array_setref (thread_frames, i, sf);
3669 mono_error_raise_exception (&error); /* FIXME don't raise here */
3673 * mono_threads_request_thread_dump:
3675 * Ask all threads except the current to print their stacktrace to stdout.
3678 mono_threads_request_thread_dump (void)
3680 /*The new thread dump code runs out of the finalizer thread. */
3681 thread_dump_requested = TRUE;
3682 mono_gc_finalize_notify ();
3687 gint allocated; /* +1 so that refs [allocated] == NULL */
3691 typedef struct ref_stack RefStack;
3694 ref_stack_new (gint initial_size)
3698 initial_size = MAX (initial_size, 16) + 1;
3699 rs = g_new0 (RefStack, 1);
3700 rs->refs = g_new0 (gpointer, initial_size);
3701 rs->allocated = initial_size;
3706 ref_stack_destroy (gpointer ptr)
3708 RefStack *rs = (RefStack *)ptr;
3717 ref_stack_push (RefStack *rs, gpointer ptr)
3719 g_assert (rs != NULL);
3721 if (rs->bottom >= rs->allocated) {
3722 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3723 rs->allocated <<= 1;
3724 rs->refs [rs->allocated] = NULL;
3726 rs->refs [rs->bottom++] = ptr;
3730 ref_stack_pop (RefStack *rs)
3732 if (rs == NULL || rs->bottom == 0)
3736 rs->refs [rs->bottom] = NULL;
3740 ref_stack_find (RefStack *rs, gpointer ptr)
3747 for (refs = rs->refs; refs && *refs; refs++) {
3755 * mono_thread_push_appdomain_ref:
3757 * Register that the current thread may have references to objects in domain
3758 * @domain on its stack. Each call to this function should be paired with a
3759 * call to pop_appdomain_ref.
3762 mono_thread_push_appdomain_ref (MonoDomain *domain)
3764 MonoInternalThread *thread = mono_thread_internal_current ();
3767 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3768 SPIN_LOCK (thread->lock_thread_id);
3769 if (thread->appdomain_refs == NULL)
3770 thread->appdomain_refs = ref_stack_new (16);
3771 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3772 SPIN_UNLOCK (thread->lock_thread_id);
3777 mono_thread_pop_appdomain_ref (void)
3779 MonoInternalThread *thread = mono_thread_internal_current ();
3782 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3783 SPIN_LOCK (thread->lock_thread_id);
3784 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3785 SPIN_UNLOCK (thread->lock_thread_id);
3790 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3793 SPIN_LOCK (thread->lock_thread_id);
3794 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3795 SPIN_UNLOCK (thread->lock_thread_id);
3800 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3802 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3805 typedef struct abort_appdomain_data {
3806 struct wait_data wait;
3808 } abort_appdomain_data;
3811 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3813 MonoInternalThread *thread = (MonoInternalThread*)value;
3814 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3815 MonoDomain *domain = data->domain;
3817 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3818 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3820 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3821 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3824 data->wait.handles [data->wait.num] = handle;
3825 data->wait.threads [data->wait.num] = thread;
3828 /* Just ignore the rest, we can't do anything with
3836 * mono_threads_abort_appdomain_threads:
3838 * Abort threads which has references to the given appdomain.
3841 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3843 #ifdef __native_client__
3847 abort_appdomain_data user_data;
3849 int orig_timeout = timeout;
3852 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3854 start_time = mono_msec_ticks ();
3856 mono_threads_lock ();
3858 user_data.domain = domain;
3859 user_data.wait.num = 0;
3860 /* This shouldn't take any locks */
3861 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3862 mono_threads_unlock ();
3864 if (user_data.wait.num > 0) {
3865 /* Abort the threads outside the threads lock */
3866 for (i = 0; i < user_data.wait.num; ++i)
3867 mono_thread_internal_abort (user_data.wait.threads [i]);
3870 * We should wait for the threads either to abort, or to leave the
3871 * domain. We can't do the latter, so we wait with a timeout.
3873 wait_for_tids (&user_data.wait, 100);
3876 /* Update remaining time */
3877 timeout -= mono_msec_ticks () - start_time;
3878 start_time = mono_msec_ticks ();
3880 if (orig_timeout != -1 && timeout < 0)
3883 while (user_data.wait.num > 0);
3885 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3891 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3893 MonoInternalThread *thread = (MonoInternalThread*)value;
3894 MonoDomain *domain = (MonoDomain*)user_data;
3897 /* No locking needed here */
3898 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3900 if (thread->cached_culture_info) {
3901 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3902 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3903 if (obj && obj->vtable->domain == domain)
3904 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3910 * mono_threads_clear_cached_culture:
3912 * Clear the cached_current_culture from all threads if it is in the
3916 mono_threads_clear_cached_culture (MonoDomain *domain)
3918 mono_threads_lock ();
3919 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3920 mono_threads_unlock ();
3924 * mono_thread_get_undeniable_exception:
3926 * Return an exception which needs to be raised when leaving a catch clause.
3927 * This is used for undeniable exception propagation.
3930 mono_thread_get_undeniable_exception (void)
3932 MonoInternalThread *thread = mono_thread_internal_current ();
3934 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3936 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3937 * exception if the thread no longer references a dying appdomain.
3939 thread->abort_exc->trace_ips = NULL;
3940 thread->abort_exc->stack_trace = NULL;
3941 return thread->abort_exc;
3947 #if MONO_SMALL_CONFIG
3948 #define NUM_STATIC_DATA_IDX 4
3949 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3953 #define NUM_STATIC_DATA_IDX 8
3954 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3955 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3959 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3960 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3963 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3965 gpointer *static_data = (gpointer *)addr;
3967 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3968 void **ptr = (void **)static_data [i];
3973 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3974 void **p = ptr + idx;
3977 mark_func ((MonoObject**)p, gc_data);
3983 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3985 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3989 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3991 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3995 * mono_alloc_static_data
3997 * Allocate memory blocks for storing threads or context static data
4000 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4002 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4005 gpointer* static_data = *static_data_ptr;
4007 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4008 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4010 if (mono_gc_user_markers_supported ()) {
4011 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4012 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4014 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4015 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4018 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4019 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4020 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4021 *static_data_ptr = static_data;
4022 static_data [0] = static_data;
4025 for (i = 1; i <= idx; ++i) {
4026 if (static_data [i])
4029 if (mono_gc_user_markers_supported ())
4030 static_data [i] = g_malloc0 (static_data_size [i]);
4032 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4033 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4034 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4039 mono_free_static_data (gpointer* static_data)
4042 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4043 gpointer p = static_data [i];
4047 * At this point, the static data pointer array is still registered with the
4048 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4049 * data. Freeing the individual arrays without first nulling their slots
4050 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4051 * such an already freed array. See bug #13813.
4053 static_data [i] = NULL;
4054 mono_memory_write_barrier ();
4055 if (mono_gc_user_markers_supported ())
4058 mono_gc_free_fixed (p);
4060 mono_gc_free_fixed (static_data);
4064 * mono_init_static_data_info
4066 * Initializes static data counters
4068 static void mono_init_static_data_info (StaticDataInfo *static_data)
4070 static_data->idx = 0;
4071 static_data->offset = 0;
4072 static_data->freelist = NULL;
4076 * mono_alloc_static_data_slot
4078 * Generates an offset for static data. static_data contains the counters
4079 * used to generate it.
4082 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4084 if (!static_data->idx && !static_data->offset) {
4086 * we use the first chunk of the first allocation also as
4087 * an array for the rest of the data
4089 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4091 static_data->offset += align - 1;
4092 static_data->offset &= ~(align - 1);
4093 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4094 static_data->idx ++;
4095 g_assert (size <= static_data_size [static_data->idx]);
4096 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4097 static_data->offset = 0;
4099 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4100 static_data->offset += size;
4105 * ensure thread static fields already allocated are valid for thread
4106 * This function is called when a thread is created or on thread attach.
4109 thread_adjust_static_data (MonoInternalThread *thread)
4111 mono_threads_lock ();
4112 if (thread_static_info.offset || thread_static_info.idx > 0) {
4113 /* get the current allocated size */
4114 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4115 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4117 mono_threads_unlock ();
4121 * LOCKING: requires that threads_mutex is held
4124 context_adjust_static_data (MonoAppContext *ctx)
4126 if (context_static_info.offset || context_static_info.idx > 0) {
4127 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4128 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4129 ctx->data->static_data = ctx->static_data;
4134 * LOCKING: requires that threads_mutex is held
4137 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4139 MonoInternalThread *thread = (MonoInternalThread *)value;
4140 guint32 offset = GPOINTER_TO_UINT (user);
4142 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4146 * LOCKING: requires that threads_mutex is held
4149 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4151 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4156 guint32 offset = GPOINTER_TO_UINT (user);
4157 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4158 ctx->data->static_data = ctx->static_data;
4161 static StaticDataFreeList*
4162 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4164 StaticDataFreeList* prev = NULL;
4165 StaticDataFreeList* tmp = static_data->freelist;
4167 if (tmp->size == size) {
4169 prev->next = tmp->next;
4171 static_data->freelist = tmp->next;
4180 #if SIZEOF_VOID_P == 4
4187 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4189 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4191 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4192 MonoBitSet *rb = sets [idx];
4193 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4194 offset /= sizeof (uintptr_t);
4195 /* offset is now the bitmap offset */
4196 for (int i = 0; i < numbits; ++i) {
4197 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4198 mono_bitset_set_fast (rb, offset + i);
4203 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4205 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4206 MonoBitSet *rb = sets [idx];
4207 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4208 offset /= sizeof (uintptr_t);
4209 /* offset is now the bitmap offset */
4210 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4211 mono_bitset_clear_fast (rb, offset + i);
4215 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4217 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4219 StaticDataInfo *info;
4222 if (static_type == SPECIAL_STATIC_THREAD) {
4223 info = &thread_static_info;
4224 sets = thread_reference_bitmaps;
4226 info = &context_static_info;
4227 sets = context_reference_bitmaps;
4230 mono_threads_lock ();
4232 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4236 offset = item->offset;
4239 offset = mono_alloc_static_data_slot (info, size, align);
4242 update_reference_bitmap (sets, offset, bitmap, numbits);
4244 if (static_type == SPECIAL_STATIC_THREAD) {
4245 /* This can be called during startup */
4246 if (threads != NULL)
4247 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4249 if (contexts != NULL)
4250 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4252 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4255 mono_threads_unlock ();
4261 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4263 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4265 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4266 return get_thread_static_data (thread, offset);
4268 return get_context_static_data (thread->current_appcontext, offset);
4273 mono_get_special_static_data (guint32 offset)
4275 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4284 * LOCKING: requires that threads_mutex is held
4287 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4289 MonoInternalThread *thread = (MonoInternalThread *)value;
4290 OffsetSize *data = (OffsetSize *)user;
4291 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4292 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4295 if (!thread->static_data || !thread->static_data [idx])
4297 ptr = ((char*) thread->static_data [idx]) + off;
4298 mono_gc_bzero_atomic (ptr, data->size);
4302 * LOCKING: requires that threads_mutex is held
4305 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4307 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4312 OffsetSize *data = (OffsetSize *)user;
4313 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4314 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4317 if (!ctx->static_data || !ctx->static_data [idx])
4320 ptr = ((char*) ctx->static_data [idx]) + off;
4321 mono_gc_bzero_atomic (ptr, data->size);
4325 do_free_special_slot (guint32 offset, guint32 size)
4327 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4329 StaticDataInfo *info;
4331 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4332 info = &thread_static_info;
4333 sets = thread_reference_bitmaps;
4335 info = &context_static_info;
4336 sets = context_reference_bitmaps;
4339 guint32 data_offset = offset;
4340 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4341 OffsetSize data = { data_offset, size };
4343 clear_reference_bitmap (sets, data.offset, data.size);
4345 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4346 if (threads != NULL)
4347 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4349 if (contexts != NULL)
4350 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4353 if (!mono_runtime_is_shutting_down ()) {
4354 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4356 item->offset = offset;
4359 item->next = info->freelist;
4360 info->freelist = item;
4365 do_free_special (gpointer key, gpointer value, gpointer data)
4367 MonoClassField *field = (MonoClassField *)key;
4368 guint32 offset = GPOINTER_TO_UINT (value);
4371 size = mono_type_size (field->type, &align);
4372 do_free_special_slot (offset, size);
4376 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4378 mono_threads_lock ();
4380 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4382 mono_threads_unlock ();
4386 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4388 /* Only ever called for ThreadLocal instances */
4389 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4391 mono_threads_lock ();
4392 do_free_special_slot (offset, size);
4393 mono_threads_unlock ();
4397 static void CALLBACK dummy_apc (ULONG_PTR param)
4403 * mono_thread_execute_interruption
4405 * Performs the operation that the requested thread state requires (abort,
4408 static MonoException*
4409 mono_thread_execute_interruption (void)
4411 MonoInternalThread *thread = mono_thread_internal_current ();
4412 MonoThread *sys_thread = mono_thread_current ();
4414 LOCK_THREAD (thread);
4416 /* MonoThread::interruption_requested can only be changed with atomics */
4417 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4418 /* this will consume pending APC calls */
4420 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4422 InterlockedDecrement (&thread_interruption_requested);
4424 /* Clear the interrupted flag of the thread so it can wait again */
4425 mono_thread_info_clear_self_interrupt ();
4428 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4429 if (sys_thread->pending_exception) {
4432 exc = sys_thread->pending_exception;
4433 sys_thread->pending_exception = NULL;
4435 UNLOCK_THREAD (thread);
4437 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4438 UNLOCK_THREAD (thread);
4439 g_assert (sys_thread->pending_exception == NULL);
4440 if (thread->abort_exc == NULL) {
4442 * This might be racy, but it has to be called outside the lock
4443 * since it calls managed code.
4445 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4447 return thread->abort_exc;
4449 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4450 /* calls UNLOCK_THREAD (thread) */
4451 self_suspend_internal ();
4454 else if ((thread->state & ThreadState_StopRequested) != 0) {
4455 /* FIXME: do this through the JIT? */
4457 UNLOCK_THREAD (thread);
4459 mono_thread_exit ();
4461 } else if (thread->thread_interrupt_requested) {
4463 thread->thread_interrupt_requested = FALSE;
4464 UNLOCK_THREAD (thread);
4466 return(mono_get_exception_thread_interrupted ());
4469 UNLOCK_THREAD (thread);
4475 * mono_thread_request_interruption
4477 * A signal handler can call this method to request the interruption of a
4478 * thread. The result of the interruption will depend on the current state of
4479 * the thread. If the result is an exception that needs to be throw, it is
4480 * provided as return value.
4483 mono_thread_request_interruption (gboolean running_managed)
4485 MonoInternalThread *thread = mono_thread_internal_current ();
4487 /* The thread may already be stopping */
4492 if (thread->interrupt_on_stop &&
4493 thread->state & ThreadState_StopRequested &&
4494 thread->state & ThreadState_Background)
4498 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4500 InterlockedIncrement (&thread_interruption_requested);
4502 if (!running_managed || is_running_protected_wrapper ()) {
4503 /* Can't stop while in unmanaged code. Increase the global interruption
4504 request count. When exiting the unmanaged method the count will be
4505 checked and the thread will be interrupted. */
4507 /* this will awake the thread if it is in WaitForSingleObject
4509 /* Our implementation of this function ignores the func argument */
4511 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4513 mono_thread_info_self_interrupt ();
4518 return mono_thread_execute_interruption ();
4522 /*This function should be called by a thread after it has exited all of
4523 * its handle blocks at interruption time.*/
4525 mono_thread_resume_interruption (void)
4527 MonoInternalThread *thread = mono_thread_internal_current ();
4528 gboolean still_aborting;
4530 /* The thread may already be stopping */
4534 LOCK_THREAD (thread);
4535 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4536 UNLOCK_THREAD (thread);
4538 /*This can happen if the protected block called Thread::ResetAbort*/
4539 if (!still_aborting)
4542 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4544 InterlockedIncrement (&thread_interruption_requested);
4546 mono_thread_info_self_interrupt ();
4548 return mono_thread_execute_interruption ();
4551 gboolean mono_thread_interruption_requested ()
4553 if (thread_interruption_requested) {
4554 MonoInternalThread *thread = mono_thread_internal_current ();
4555 /* The thread may already be stopping */
4557 return (thread->interruption_requested);
4562 static MonoException*
4563 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4565 MonoInternalThread *thread = mono_thread_internal_current ();
4567 /* The thread may already be stopping */
4571 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4572 MonoException* exc = mono_thread_execute_interruption ();
4580 * Performs the interruption of the current thread, if one has been requested,
4581 * and the thread is not running a protected wrapper.
4582 * Return the exception which needs to be thrown, if any.
4585 mono_thread_interruption_checkpoint (void)
4587 return mono_thread_interruption_checkpoint_request (FALSE);
4591 * Performs the interruption of the current thread, if one has been requested.
4592 * Return the exception which needs to be thrown, if any.
4595 mono_thread_force_interruption_checkpoint_noraise (void)
4597 return mono_thread_interruption_checkpoint_request (TRUE);
4601 * mono_set_pending_exception:
4603 * Set the pending exception of the current thread to EXC.
4604 * The exception will be thrown when execution returns to managed code.
4607 mono_set_pending_exception (MonoException *exc)
4609 MonoThread *thread = mono_thread_current ();
4611 /* The thread may already be stopping */
4615 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4617 mono_thread_request_interruption (FALSE);
4621 * mono_thread_interruption_request_flag:
4623 * Returns the address of a flag that will be non-zero if an interruption has
4624 * been requested for a thread. The thread to interrupt may not be the current
4625 * thread, so an additional call to mono_thread_interruption_requested() or
4626 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4629 gint32* mono_thread_interruption_request_flag ()
4631 return &thread_interruption_requested;
4635 mono_thread_init_apartment_state (void)
4638 MonoInternalThread* thread = mono_thread_internal_current ();
4640 /* Positive return value indicates success, either
4641 * S_OK if this is first CoInitialize call, or
4642 * S_FALSE if CoInitialize already called, but with same
4643 * threading model. A negative value indicates failure,
4644 * probably due to trying to change the threading model.
4646 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4647 ? COINIT_APARTMENTTHREADED
4648 : COINIT_MULTITHREADED) < 0) {
4649 thread->apartment_state = ThreadApartmentState_Unknown;
4655 mono_thread_cleanup_apartment_state (void)
4658 MonoInternalThread* thread = mono_thread_internal_current ();
4660 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4667 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4669 LOCK_THREAD (thread);
4670 thread->state |= state;
4671 UNLOCK_THREAD (thread);
4675 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4677 LOCK_THREAD (thread);
4678 thread->state &= ~state;
4679 UNLOCK_THREAD (thread);
4683 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4685 gboolean ret = FALSE;
4687 LOCK_THREAD (thread);
4689 if ((thread->state & test) != 0) {
4693 UNLOCK_THREAD (thread);
4698 static gboolean has_tls_get = FALSE;
4701 mono_runtime_set_has_tls_get (gboolean val)
4707 mono_runtime_has_tls_get (void)
4713 self_interrupt_thread (void *_unused)
4715 MonoThreadInfo *info = mono_thread_info_current ();
4716 MonoException *exc = mono_thread_execute_interruption ();
4717 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4718 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. */
4719 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4723 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4727 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4731 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4733 MonoJitInfo **dest = (MonoJitInfo **)data;
4739 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4741 MonoJitInfo *ji = NULL;
4746 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4747 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4748 * where we hold runtime locks.
4750 if (!mono_threads_is_coop_enabled ())
4751 mono_thread_info_set_is_async_context (TRUE);
4752 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4753 if (!mono_threads_is_coop_enabled ())
4754 mono_thread_info_set_is_async_context (FALSE);
4759 MonoInternalThread *thread;
4760 gboolean install_async_abort;
4761 MonoThreadInfoInterruptToken *interrupt_token;
4764 static SuspendThreadResult
4765 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4767 AbortThreadData *data = (AbortThreadData *)ud;
4768 MonoInternalThread *thread = data->thread;
4769 MonoJitInfo *ji = NULL;
4770 gboolean protected_wrapper;
4771 gboolean running_managed;
4773 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4774 return MonoResumeThread;
4776 /*someone is already interrupting it*/
4777 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4778 return MonoResumeThread;
4780 InterlockedIncrement (&thread_interruption_requested);
4782 ji = mono_thread_info_get_last_managed (info);
4783 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4784 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4786 if (!protected_wrapper && running_managed) {
4787 /*We are in managed code*/
4788 /*Set the thread to call */
4789 if (data->install_async_abort)
4790 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4791 return MonoResumeThread;
4794 * This will cause waits to be broken.
4795 * It will also prevent the thread from entering a wait, so if the thread returns
4796 * from the wait before it receives the abort signal, it will just spin in the wait
4797 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4800 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4802 return MonoResumeThread;
4807 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4809 AbortThreadData data;
4811 g_assert (thread != mono_thread_internal_current ());
4813 data.thread = thread;
4814 data.install_async_abort = install_async_abort;
4815 data.interrupt_token = NULL;
4817 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4818 if (data.interrupt_token)
4819 mono_thread_info_finish_interrupt (data.interrupt_token);
4820 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4824 self_abort_internal (void)
4828 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4829 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4831 exc = mono_thread_request_interruption (TRUE);
4833 mono_raise_exception (exc);
4835 mono_thread_info_self_interrupt ();
4839 MonoInternalThread *thread;
4841 MonoThreadInfoInterruptToken *interrupt_token;
4842 } SuspendThreadData;
4844 static SuspendThreadResult
4845 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4847 SuspendThreadData *data = (SuspendThreadData *)ud;
4848 MonoInternalThread *thread = data->thread;
4849 MonoJitInfo *ji = NULL;
4850 gboolean protected_wrapper;
4851 gboolean running_managed;
4853 ji = mono_thread_info_get_last_managed (info);
4854 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4855 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4857 if (running_managed && !protected_wrapper) {
4858 thread->state &= ~ThreadState_SuspendRequested;
4859 thread->state |= ThreadState_Suspended;
4860 return KeepSuspended;
4862 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4863 InterlockedIncrement (&thread_interruption_requested);
4864 if (data->interrupt)
4865 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4867 return MonoResumeThread;
4871 /* LOCKING: called with @thread synch_cs held, and releases it */
4873 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4875 SuspendThreadData data;
4877 g_assert (thread != mono_thread_internal_current ());
4879 data.thread = thread;
4880 data.interrupt = interrupt;
4881 data.interrupt_token = NULL;
4883 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4884 if (data.interrupt_token)
4885 mono_thread_info_finish_interrupt (data.interrupt_token);
4887 UNLOCK_THREAD (thread);
4890 /* LOCKING: called with @thread synch_cs held, and releases it */
4892 self_suspend_internal (void)
4894 MonoInternalThread *thread;
4896 thread = mono_thread_internal_current ();
4898 mono_thread_info_begin_self_suspend ();
4899 thread->state &= ~ThreadState_SuspendRequested;
4900 thread->state |= ThreadState_Suspended;
4902 UNLOCK_THREAD (thread);
4904 mono_thread_info_end_self_suspend ();
4908 * mono_thread_is_foreign:
4909 * @thread: the thread to query
4911 * This function allows one to determine if a thread was created by the mono runtime and has
4912 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4914 * Returns: TRUE if @thread was not created by the runtime.
4917 mono_thread_is_foreign (MonoThread *thread)
4919 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4920 return info->runtime_thread == FALSE;
4924 * mono_add_joinable_thread:
4926 * Add TID to the list of joinable threads.
4927 * LOCKING: Acquires the threads lock.
4930 mono_threads_add_joinable_thread (gpointer tid)
4934 * We cannot detach from threads because it causes problems like
4935 * 2fd16f60/r114307. So we collect them and join them when
4936 * we have time (in he finalizer thread).
4938 joinable_threads_lock ();
4939 if (!joinable_threads)
4940 joinable_threads = g_hash_table_new (NULL, NULL);
4941 g_hash_table_insert (joinable_threads, tid, tid);
4942 joinable_thread_count ++;
4943 joinable_threads_unlock ();
4945 mono_gc_finalize_notify ();
4950 * mono_threads_join_threads:
4952 * Join all joinable threads. This is called from the finalizer thread.
4953 * LOCKING: Acquires the threads lock.
4956 mono_threads_join_threads (void)
4959 GHashTableIter iter;
4966 if (!joinable_thread_count)
4970 joinable_threads_lock ();
4972 if (g_hash_table_size (joinable_threads)) {
4973 g_hash_table_iter_init (&iter, joinable_threads);
4974 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4975 thread = (pthread_t)tid;
4976 g_hash_table_remove (joinable_threads, key);
4977 joinable_thread_count --;
4980 joinable_threads_unlock ();
4982 if (thread != pthread_self ())
4983 /* This shouldn't block */
4984 pthread_join (thread, NULL);
4995 * Wait for thread TID to exit.
4996 * LOCKING: Acquires the threads lock.
4999 mono_thread_join (gpointer tid)
5003 gboolean found = FALSE;
5005 joinable_threads_lock ();
5006 if (!joinable_threads)
5007 joinable_threads = g_hash_table_new (NULL, NULL);
5008 if (g_hash_table_lookup (joinable_threads, tid)) {
5009 g_hash_table_remove (joinable_threads, tid);
5010 joinable_thread_count --;
5013 joinable_threads_unlock ();
5016 thread = (pthread_t)tid;
5017 pthread_join (thread, NULL);
5022 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5024 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5025 mono_thread_interruption_checkpoint ();
5028 static inline gboolean
5029 is_appdomainunloaded_exception (MonoClass *klass)
5031 return klass == mono_class_get_appdomain_unloaded_exception_class ();
5034 static inline gboolean
5035 is_threadabort_exception (MonoClass *klass)
5037 return klass == mono_defaults.threadabortexception_class;
5041 mono_thread_internal_unhandled_exception (MonoObject* exc)
5043 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5044 MonoClass *klass = exc->vtable->klass;
5045 if (is_threadabort_exception (klass)) {
5046 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5047 } else if (!is_appdomainunloaded_exception (klass)) {
5048 mono_unhandled_exception (exc);
5049 if (mono_environment_exitcode_get () == 1)
5056 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5058 mono_threads_get_thread_dump (out_threads, out_stack_traces);