2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
19 #include <mono/metadata/object.h>
20 #include <mono/metadata/domain-internals.h>
21 #include <mono/metadata/profiler-private.h>
22 #include <mono/metadata/threads.h>
23 #include <mono/metadata/threads-types.h>
24 #include <mono/metadata/exception.h>
25 #include <mono/metadata/environment.h>
26 #include <mono/metadata/monitor.h>
27 #include <mono/metadata/gc-internals.h>
28 #include <mono/metadata/marshal.h>
29 #include <mono/metadata/runtime.h>
30 #include <mono/io-layer/io-layer.h>
31 #include <mono/metadata/object-internals.h>
32 #include <mono/metadata/mono-debug-debugger.h>
33 #include <mono/utils/monobitset.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/hazard-pointer.h>
40 #include <mono/utils/mono-tls.h>
41 #include <mono/utils/atomic.h>
42 #include <mono/utils/mono-memory-model.h>
44 #include <mono/metadata/gc-internals.h>
45 #include <mono/metadata/reflection-internals.h>
51 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
52 #define USE_TKILL_ON_ANDROID 1
55 #ifdef PLATFORM_ANDROID
58 #ifdef USE_TKILL_ON_ANDROID
59 extern int tkill (pid_t tid, int signal);
63 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
64 #define THREAD_DEBUG(a)
65 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
66 #define THREAD_WAIT_DEBUG(a)
67 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
68 #define LIBGC_DEBUG(a)
70 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
71 #define SPIN_LOCK(i) do { \
72 if (SPIN_TRYLOCK (i)) \
76 #define SPIN_UNLOCK(i) i = 0
78 #define LOCK_THREAD(thread) lock_thread((thread))
79 #define UNLOCK_THREAD(thread) unlock_thread((thread))
81 /* Provide this for systems with glib < 2.6 */
82 #ifndef G_GSIZE_FORMAT
83 # if GLIB_SIZEOF_LONG == 8
84 # define G_GSIZE_FORMAT "lu"
86 # define G_GSIZE_FORMAT "u"
92 guint32 (*func)(void *);
108 typedef struct _StaticDataFreeList StaticDataFreeList;
109 struct _StaticDataFreeList {
110 StaticDataFreeList *next;
118 StaticDataFreeList *freelist;
121 /* Number of cached culture objects in the MonoThread->cached_culture_info array
122 * (per-type): we use the first NUM entries for CultureInfo and the last for
123 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
125 #define NUM_CACHED_CULTURES 4
126 #define CULTURES_START_IDX 0
127 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
129 /* Controls access to the 'threads' hash table */
130 static void mono_threads_lock (void);
131 static void mono_threads_unlock (void);
132 static MonoCoopMutex threads_mutex;
134 /* Controls access to the 'joinable_threads' hash table */
135 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
136 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
137 static mono_mutex_t joinable_threads_mutex;
139 /* Holds current status of static data heap */
140 static StaticDataInfo thread_static_info;
141 static StaticDataInfo context_static_info;
143 /* The hash of existing threads (key is thread ID, value is
144 * MonoInternalThread*) that need joining before exit
146 static MonoGHashTable *threads=NULL;
148 /* List of app context GC handles.
149 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
151 static GHashTable *contexts = NULL;
153 /* Cleanup queue for contexts. */
154 static MonoReferenceQueue *context_queue;
157 * Threads which are starting up and they are not in the 'threads' hash yet.
158 * When handle_store is called for a thread, it will be removed from this hash table.
159 * Protected by mono_threads_lock ().
161 static MonoGHashTable *threads_starting_up = NULL;
163 /* The TLS key that holds the MonoObject assigned to each thread */
164 static MonoNativeTlsKey current_object_key;
167 /* Protected by the threads lock */
168 static GHashTable *joinable_threads;
169 static int joinable_thread_count;
171 #ifdef MONO_HAVE_FAST_TLS
172 /* we need to use both the Tls* functions and __thread because
173 * the gc needs to see all the threads
175 MONO_FAST_TLS_DECLARE(tls_current_object);
176 #define SET_CURRENT_OBJECT(x) do { \
177 MONO_FAST_TLS_SET (tls_current_object, x); \
178 mono_native_tls_set_value (current_object_key, x); \
180 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
182 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
183 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
186 /* function called at thread start */
187 static MonoThreadStartCB mono_thread_start_cb = NULL;
189 /* function called at thread attach */
190 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
192 /* function called at thread cleanup */
193 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
195 /* The default stack size for each thread */
196 static guint32 default_stacksize = 0;
197 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
199 static void thread_adjust_static_data (MonoInternalThread *thread);
200 static void context_adjust_static_data (MonoAppContext *ctx);
201 static void mono_free_static_data (gpointer* static_data);
202 static void mono_init_static_data_info (StaticDataInfo *static_data);
203 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
204 static gboolean mono_thread_resume (MonoInternalThread* thread);
205 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
206 static void self_abort_internal (void);
207 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
208 static void self_suspend_internal (void);
210 static MonoException* mono_thread_execute_interruption (void);
211 static void ref_stack_destroy (gpointer rs);
213 /* Spin lock for InterlockedXXX 64 bit functions */
214 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
215 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
216 static mono_mutex_t interlocked_mutex;
218 /* global count of thread interruptions requested */
219 static gint32 thread_interruption_requested = 0;
221 /* Event signaled when a thread changes its background mode */
222 static HANDLE background_change_event;
224 static gboolean shutting_down = FALSE;
226 static gint32 managed_thread_id_counter = 0;
228 /* Class lazy loading functions */
229 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
232 mono_threads_lock (void)
234 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
238 mono_threads_unlock (void)
240 mono_locks_coop_release (&threads_mutex, ThreadsLock);
245 get_next_managed_thread_id (void)
247 return InterlockedIncrement (&managed_thread_id_counter);
251 mono_thread_get_tls_key (void)
253 return current_object_key;
257 mono_thread_get_tls_offset (void)
260 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
264 static inline MonoNativeThreadId
265 thread_get_tid (MonoInternalThread *thread)
267 /* We store the tid as a guint64 to keep the object layout constant between platforms */
268 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
271 /* handle_store() and handle_remove() manage the array of threads that
272 * still need to be waited for when the main thread exits.
274 * If handle_store() returns FALSE the thread must not be started
275 * because Mono is shutting down.
277 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
279 mono_threads_lock ();
281 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
283 if (threads_starting_up)
284 mono_g_hash_table_remove (threads_starting_up, thread);
286 if (shutting_down && !force_attach) {
287 mono_threads_unlock ();
292 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
293 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
296 /* We don't need to duplicate thread->handle, because it is
297 * only closed when the thread object is finalized by the GC.
299 g_assert (thread->internal_thread);
300 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
301 thread->internal_thread);
303 mono_threads_unlock ();
308 static gboolean handle_remove(MonoInternalThread *thread)
311 gsize tid = thread->tid;
313 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
315 mono_threads_lock ();
318 /* We have to check whether the thread object for the
319 * tid is still the same in the table because the
320 * thread might have been destroyed and the tid reused
321 * in the meantime, in which case the tid would be in
322 * the table, but with another thread object.
324 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
325 mono_g_hash_table_remove (threads, (gpointer)tid);
334 mono_threads_unlock ();
336 /* Don't close the handle here, wait for the object finalizer
337 * to do it. Otherwise, the following race condition applies:
339 * 1) Thread exits (and handle_remove() closes the handle)
341 * 2) Some other handle is reassigned the same slot
343 * 3) Another thread tries to join the first thread, and
344 * blocks waiting for the reassigned handle to be signalled
345 * (which might never happen). This is possible, because the
346 * thread calling Join() still has a reference to the first
352 static void ensure_synch_cs_set (MonoInternalThread *thread)
354 MonoCoopMutex *synch_cs;
356 if (thread->synch_cs != NULL) {
360 synch_cs = g_new0 (MonoCoopMutex, 1);
361 mono_coop_mutex_init_recursive (synch_cs);
363 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
364 synch_cs, NULL) != NULL) {
365 /* Another thread must have installed this CS */
366 mono_coop_mutex_destroy (synch_cs);
372 lock_thread (MonoInternalThread *thread)
374 if (!thread->synch_cs)
375 ensure_synch_cs_set (thread);
377 g_assert (thread->synch_cs);
379 mono_coop_mutex_lock (thread->synch_cs);
383 unlock_thread (MonoInternalThread *thread)
385 mono_coop_mutex_unlock (thread->synch_cs);
389 * NOTE: this function can be called also for threads different from the current one:
390 * make sure no code called from it will ever assume it is run on the thread that is
391 * getting cleaned up.
393 static void thread_cleanup (MonoInternalThread *thread)
395 g_assert (thread != NULL);
397 if (thread->abort_state_handle) {
398 mono_gchandle_free (thread->abort_state_handle);
399 thread->abort_state_handle = 0;
401 thread->abort_exc = NULL;
402 thread->current_appcontext = NULL;
405 * This is necessary because otherwise we might have
406 * cross-domain references which will not get cleaned up when
407 * the target domain is unloaded.
409 if (thread->cached_culture_info) {
411 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
412 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
416 * thread->synch_cs can be NULL if this was called after
417 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
418 * This can happen only during shutdown.
419 * The shutting_down flag is not always set, so we can't assert on it.
421 if (thread->synch_cs)
422 LOCK_THREAD (thread);
424 thread->state |= ThreadState_Stopped;
425 thread->state &= ~ThreadState_Background;
427 if (thread->synch_cs)
428 UNLOCK_THREAD (thread);
431 An interruption request has leaked to cleanup. Adjust the global counter.
433 This can happen is the abort source thread finds the abortee (this) thread
434 in unmanaged code. If this thread never trips back to managed code or check
435 the local flag it will be left set and positively unbalance the global counter.
437 Leaving the counter unbalanced will cause a performance degradation since all threads
438 will now keep checking their local flags all the time.
440 if (InterlockedExchange (&thread->interruption_requested, 0))
441 InterlockedDecrement (&thread_interruption_requested);
443 /* if the thread is not in the hash it has been removed already */
444 if (!handle_remove (thread)) {
445 if (thread == mono_thread_internal_current ()) {
446 mono_domain_unset ();
447 mono_memory_barrier ();
449 /* This needs to be called even if handle_remove () fails */
450 if (mono_thread_cleanup_fn)
451 mono_thread_cleanup_fn (thread_get_tid (thread));
454 mono_release_type_locks (thread);
456 mono_profiler_thread_end (thread->tid);
458 if (thread == mono_thread_internal_current ()) {
460 * This will signal async signal handlers that the thread has exited.
461 * The profiler callback needs this to be set, so it cannot be done earlier.
463 mono_domain_unset ();
464 mono_memory_barrier ();
467 if (thread == mono_thread_internal_current ())
468 mono_thread_pop_appdomain_ref ();
470 thread->cached_culture_info = NULL;
472 mono_free_static_data (thread->static_data);
473 thread->static_data = NULL;
474 ref_stack_destroy (thread->appdomain_refs);
475 thread->appdomain_refs = NULL;
477 if (mono_thread_cleanup_fn)
478 mono_thread_cleanup_fn (thread_get_tid (thread));
480 if (mono_gc_is_moving ()) {
481 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
482 thread->thread_pinning_ref = NULL;
488 * A special static data offset (guint32) consists of 3 parts:
490 * [0] 6-bit index into the array of chunks.
491 * [6] 25-bit offset into the array.
492 * [31] Bit indicating thread or context static.
497 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
508 } SpecialStaticOffset;
510 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
511 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
513 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
514 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
515 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
516 (((SpecialStaticOffset *) &(x))->fields.f)
519 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
521 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
523 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
524 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
526 return ((char *) thread->static_data [idx]) + off;
530 get_context_static_data (MonoAppContext *ctx, guint32 offset)
532 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
534 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
535 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
537 return ((char *) ctx->static_data [idx]) + off;
541 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
543 static MonoClassField *current_thread_field = NULL;
547 if (!current_thread_field) {
548 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
549 g_assert (current_thread_field);
552 mono_class_vtable (domain, mono_defaults.thread_class);
553 mono_domain_lock (domain);
554 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
555 mono_domain_unlock (domain);
558 return (MonoThread **)get_thread_static_data (thread, offset);
562 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
564 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
566 g_assert (current->obj.vtable->domain == domain);
568 g_assert (!*current_thread_ptr);
569 *current_thread_ptr = current;
573 create_thread_object (MonoDomain *domain, MonoError *error)
575 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
576 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
581 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
585 thread = create_thread_object (domain, error);
586 if (!mono_error_ok (error))
589 MONO_OBJECT_SETREF (thread, internal_thread, internal);
594 static MonoInternalThread*
595 create_internal_thread (MonoError *error)
597 MonoInternalThread *thread;
600 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
601 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
602 if (!mono_error_ok (error))
605 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
606 mono_coop_mutex_init_recursive (thread->synch_cs);
608 thread->apartment_state = ThreadApartmentState_Unknown;
609 thread->managed_id = get_next_managed_thread_id ();
610 if (mono_gc_is_moving ()) {
611 thread->thread_pinning_ref = thread;
612 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
619 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
622 MonoDomain *domain = mono_get_root_domain ();
624 if (!candidate || candidate->obj.vtable->domain != domain) {
625 candidate = new_thread_with_internal (domain, thread, &error);
626 mono_error_raise_exception (&error); /* FIXME don't raise here */
628 set_current_thread_for_domain (domain, thread, candidate);
629 g_assert (!thread->root_domain_thread);
630 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
633 static guint32 WINAPI start_wrapper_internal(void *data)
635 MonoThreadInfo *info;
636 StartInfo *start_info = (StartInfo *)data;
637 guint32 (*start_func)(void *);
641 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
644 MonoInternalThread *internal = start_info->obj->internal_thread;
645 MonoObject *start_delegate = start_info->delegate;
646 MonoDomain *domain = start_info->obj->obj.vtable->domain;
648 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
650 /* We can be sure start_info->obj->tid and
651 * start_info->obj->handle have been set, because the thread
652 * was created suspended, and these values were set before the
656 info = mono_thread_info_current ();
658 internal->thread_info = info;
659 internal->small_id = info->small_id;
663 SET_CURRENT_OBJECT (internal);
665 /* Every thread references the appdomain which created it */
666 mono_thread_push_appdomain_ref (domain);
668 if (!mono_domain_set (domain, FALSE)) {
669 /* No point in raising an appdomain_unloaded exception here */
670 /* FIXME: Cleanup here */
671 mono_thread_pop_appdomain_ref ();
675 start_func = start_info->func;
676 start_arg = start_info->obj->start_obj;
678 start_arg = start_info->start_arg;
680 /* We have to do this here because mono_thread_new_init()
681 requires that root_domain_thread is set up. */
682 thread_adjust_static_data (internal);
683 init_root_domain_thread (internal, start_info->obj);
685 /* This MUST be called before any managed code can be
686 * executed, as it calls the callback function that (for the
687 * jit) sets the lmf marker.
689 mono_thread_new_init (tid, &tid, start_func);
690 internal->stack_ptr = &tid;
691 if (domain != mono_get_root_domain ())
692 set_current_thread_for_domain (domain, internal, start_info->obj);
694 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
696 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
698 /* On 2.0 profile (and higher), set explicitly since state might have been
700 if (internal->apartment_state == ThreadApartmentState_Unknown)
701 internal->apartment_state = ThreadApartmentState_MTA;
703 mono_thread_init_apartment_state ();
705 if(internal->start_notify!=NULL) {
706 /* Let the thread that called Start() know we're
709 ReleaseSemaphore (internal->start_notify, 1, NULL);
713 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
717 * Call this after calling start_notify, since the profiler callback might want
718 * to lock the thread, and the lock is held by thread_start () which waits for
721 mono_profiler_thread_start (tid);
723 /* if the name was set before starting, we didn't invoke the profiler callback */
724 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
725 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
726 mono_profiler_thread_name (internal->tid, tname);
729 /* start_func is set only for unmanaged start functions */
731 start_func (start_arg);
734 g_assert (start_delegate != NULL);
735 args [0] = start_arg;
736 /* we may want to handle the exception here. See comment below on unhandled exceptions */
737 mono_runtime_delegate_invoke (start_delegate, args, NULL);
740 /* If the thread calls ExitThread at all, this remaining code
741 * will not be executed, but the main thread will eventually
742 * call thread_cleanup() on this thread's behalf.
745 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
747 /* Do any cleanup needed for apartment state. This
748 * cannot be done in thread_cleanup since thread_cleanup could be
749 * called for a thread other than the current thread.
750 * mono_thread_cleanup_apartment_state cleans up apartment
751 * for the current thead */
752 mono_thread_cleanup_apartment_state ();
754 thread_cleanup (internal);
758 /* Remove the reference to the thread object in the TLS data,
759 * so the thread object can be finalized. This won't be
760 * reached if the thread threw an uncaught exception, so those
761 * thread handles will stay referenced :-( (This is due to
762 * missing support for scanning thread-specific data in the
763 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
766 SET_CURRENT_OBJECT (NULL);
771 static guint32 WINAPI start_wrapper(void *data)
775 /* Avoid scanning the frames above this frame during a GC */
776 mono_gc_set_stack_end ((void*)&dummy);
778 return start_wrapper_internal (data);
784 * Common thread creation code.
785 * LOCKING: Acquires the threads lock.
788 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
789 gboolean throw_on_failure)
791 HANDLE thread_handle;
792 MonoNativeThreadId tid;
793 guint32 create_flags;
796 * Join joinable threads to prevent running out of threads since the finalizer
797 * thread might be blocked/backlogged.
799 mono_threads_join_threads ();
801 mono_threads_lock ();
804 mono_threads_unlock ();
807 if (threads_starting_up == NULL) {
808 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
809 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
811 mono_g_hash_table_insert (threads_starting_up, thread, thread);
812 mono_threads_unlock ();
814 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
815 if (!internal->start_notify) {
816 mono_threads_lock ();
817 mono_g_hash_table_remove (threads_starting_up, thread);
818 mono_threads_unlock ();
819 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
825 stack_size = default_stacksize_for_thread (internal);
827 /* Create suspended, so we can do some housekeeping before the thread
830 create_flags = CREATE_SUSPENDED;
832 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
833 stack_size, create_flags, &tid);
835 if (thread_handle == NULL) {
836 /* The thread couldn't be created, so throw an exception */
837 mono_threads_lock ();
838 mono_g_hash_table_remove (threads_starting_up, thread);
839 mono_threads_unlock ();
841 if (throw_on_failure)
842 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
844 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
847 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
849 internal->handle = thread_handle;
850 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
852 internal->threadpool_thread = threadpool_thread;
853 if (threadpool_thread)
854 mono_thread_set_state (internal, ThreadState_Background);
856 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
858 /* Only store the handle when the thread is about to be
859 * launched, to avoid the main thread deadlocking while trying
860 * to clean up a thread that will never be signalled.
862 if (!handle_store (thread, FALSE))
865 mono_thread_info_resume (tid);
867 if (internal->start_notify) {
869 * Wait for the thread to set up its TLS data etc, so
870 * theres no potential race condition if someone tries
871 * to look up the data believing the thread has
874 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
876 MONO_PREPARE_BLOCKING;
877 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
878 MONO_FINISH_BLOCKING;
880 CloseHandle (internal->start_notify);
881 internal->start_notify = NULL;
884 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
889 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
891 if (mono_thread_start_cb) {
892 mono_thread_start_cb (tid, stack_start, func);
896 void mono_threads_set_default_stacksize (guint32 stacksize)
898 default_stacksize = stacksize;
901 guint32 mono_threads_get_default_stacksize (void)
903 return default_stacksize;
907 * mono_thread_create_internal:
909 * ARG should not be a GC reference.
912 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
916 MonoInternalThread *internal;
917 StartInfo *start_info;
920 thread = create_thread_object (domain, &error);
921 mono_error_raise_exception (&error); /* FIXME don't raise here */
923 internal = create_internal_thread (&error);
924 mono_error_raise_exception (&error); /* FIXME don't raise here */
926 MONO_OBJECT_SETREF (thread, internal_thread, internal);
928 start_info = g_new0 (StartInfo, 1);
929 start_info->func = (guint32 (*)(void *))func;
930 start_info->obj = thread;
931 start_info->start_arg = arg;
933 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
937 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
938 #ifndef MONO_CROSS_COMPILE
939 if (mono_check_corlib_version () == NULL)
940 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
947 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
949 mono_thread_create_internal (domain, func, arg, FALSE, 0);
953 mono_thread_attach (MonoDomain *domain)
956 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
957 mono_error_raise_exception (&error);
963 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
965 MonoThreadInfo *info;
966 MonoInternalThread *thread;
967 MonoThread *current_thread;
968 HANDLE thread_handle;
969 MonoNativeThreadId tid;
971 mono_error_init (error);
973 if ((thread = mono_thread_internal_current ())) {
974 if (domain != mono_domain_get ())
975 mono_domain_set (domain, TRUE);
976 /* Already attached */
977 return mono_thread_current ();
980 if (!mono_gc_register_thread (&domain)) {
981 g_error ("Thread %"G_GSIZE_FORMAT" calling into managed code is not registered with the GC. On UNIX, this can be fixed by #include-ing <gc.h> before <pthread.h> in the file containing the thread creation code.", mono_native_thread_id_get ());
984 thread = create_internal_thread (error);
985 if (!mono_error_ok (error))
988 thread_handle = mono_thread_info_open_handle ();
989 g_assert (thread_handle);
991 tid=mono_native_thread_id_get ();
993 thread->handle = thread_handle;
994 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
995 thread->stack_ptr = &tid;
997 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
999 info = mono_thread_info_current ();
1001 thread->thread_info = info;
1002 thread->small_id = info->small_id;
1004 current_thread = new_thread_with_internal (domain, thread, error);
1005 if (!mono_error_ok (error))
1008 if (!handle_store (current_thread, force_attach)) {
1009 /* Mono is shutting down, so just wait for the end */
1011 mono_thread_info_sleep (10000, NULL);
1014 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1016 SET_CURRENT_OBJECT (thread);
1017 mono_domain_set (domain, TRUE);
1019 thread_adjust_static_data (thread);
1021 init_root_domain_thread (thread, current_thread);
1022 if (domain != mono_get_root_domain ())
1023 set_current_thread_for_domain (domain, thread, current_thread);
1026 if (mono_thread_attach_cb) {
1030 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1033 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1035 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1038 // FIXME: Need a separate callback
1039 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1041 return current_thread;
1045 mono_thread_detach_internal (MonoInternalThread *thread)
1047 g_return_if_fail (thread != NULL);
1049 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1051 thread_cleanup (thread);
1053 SET_CURRENT_OBJECT (NULL);
1054 mono_domain_unset ();
1056 /* Don't need to CloseHandle this thread, even though we took a
1057 * reference in mono_thread_attach (), because the GC will do it
1058 * when the Thread object is finalised.
1063 mono_thread_detach (MonoThread *thread)
1066 mono_thread_detach_internal (thread->internal_thread);
1070 * mono_thread_detach_if_exiting:
1072 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1073 * This should be used at the end of embedding code which calls into managed code, and which
1074 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1077 mono_thread_detach_if_exiting (void)
1079 if (mono_thread_info_is_exiting ()) {
1080 MonoInternalThread *thread;
1082 thread = mono_thread_internal_current ();
1084 mono_thread_detach_internal (thread);
1085 mono_thread_info_detach ();
1093 MonoInternalThread *thread = mono_thread_internal_current ();
1095 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1097 thread_cleanup (thread);
1098 SET_CURRENT_OBJECT (NULL);
1099 mono_domain_unset ();
1101 /* we could add a callback here for embedders to use. */
1102 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1103 exit (mono_environment_exitcode_get ());
1104 mono_thread_info_exit ();
1108 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1111 MonoInternalThread *internal;
1113 internal = create_internal_thread (&error);
1114 mono_error_raise_exception (&error);
1116 internal->state = ThreadState_Unstarted;
1118 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1122 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1125 StartInfo *start_info;
1126 MonoInternalThread *internal;
1129 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1131 if (!this_obj->internal_thread)
1132 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1133 internal = this_obj->internal_thread;
1135 LOCK_THREAD (internal);
1137 if ((internal->state & ThreadState_Unstarted) == 0) {
1138 UNLOCK_THREAD (internal);
1139 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1143 if ((internal->state & ThreadState_Aborted) != 0) {
1144 UNLOCK_THREAD (internal);
1147 /* This is freed in start_wrapper */
1148 start_info = g_new0 (StartInfo, 1);
1149 start_info->func = NULL;
1150 start_info->start_arg = NULL;
1151 start_info->delegate = start;
1152 start_info->obj = this_obj;
1153 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1155 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1157 UNLOCK_THREAD (internal);
1161 internal->state &= ~ThreadState_Unstarted;
1163 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1165 UNLOCK_THREAD (internal);
1166 return internal->handle;
1170 * This is called from the finalizer of the internal thread object.
1173 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1175 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1178 * Since threads keep a reference to their thread object while running, by the time this function is called,
1179 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1180 * when thread_cleanup () can be called after this.
1183 CloseHandle (thread);
1185 if (this_obj->synch_cs) {
1186 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1187 this_obj->synch_cs = NULL;
1188 mono_coop_mutex_destroy (synch_cs);
1192 if (this_obj->name) {
1193 void *name = this_obj->name;
1194 this_obj->name = NULL;
1200 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1203 MonoInternalThread *thread = mono_thread_internal_current ();
1205 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1207 mono_thread_current_check_pending_interrupt ();
1210 gboolean alerted = FALSE;
1212 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1214 res = mono_thread_info_sleep (ms, &alerted);
1216 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1219 MonoException* exc = mono_thread_execute_interruption ();
1221 mono_raise_exception (exc);
1233 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1238 ves_icall_System_Threading_Thread_GetDomainID (void)
1240 return mono_domain_get()->domain_id;
1244 ves_icall_System_Threading_Thread_Yield (void)
1246 return mono_thread_info_yield ();
1250 * mono_thread_get_name:
1252 * Return the name of the thread. NAME_LEN is set to the length of the name.
1253 * Return NULL if the thread has no name. The returned memory is owned by the
1257 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1261 LOCK_THREAD (this_obj);
1263 if (!this_obj->name) {
1267 *name_len = this_obj->name_len;
1268 res = g_new (gunichar2, this_obj->name_len);
1269 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1272 UNLOCK_THREAD (this_obj);
1278 * mono_thread_get_name_utf8:
1280 * Return the name of the thread in UTF-8.
1281 * Return NULL if the thread has no name.
1282 * The returned memory is owned by the caller.
1285 mono_thread_get_name_utf8 (MonoThread *thread)
1290 MonoInternalThread *internal = thread->internal_thread;
1291 if (internal == NULL)
1294 LOCK_THREAD (internal);
1296 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1298 UNLOCK_THREAD (internal);
1304 * mono_thread_get_managed_id:
1306 * Return the Thread.ManagedThreadId value of `thread`.
1307 * Returns -1 if `thread` is NULL.
1310 mono_thread_get_managed_id (MonoThread *thread)
1315 MonoInternalThread *internal = thread->internal_thread;
1316 if (internal == NULL)
1319 int32_t id = internal->managed_id;
1325 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1330 mono_error_init (&error);
1332 LOCK_THREAD (this_obj);
1334 if (!this_obj->name)
1337 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1339 UNLOCK_THREAD (this_obj);
1341 mono_error_raise_exception (&error);
1347 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1349 LOCK_THREAD (this_obj);
1351 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1352 UNLOCK_THREAD (this_obj);
1354 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1357 if (this_obj->name) {
1358 g_free (this_obj->name);
1359 this_obj->name_len = 0;
1362 this_obj->name = g_new (gunichar2, mono_string_length (name));
1363 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1364 this_obj->name_len = mono_string_length (name);
1367 this_obj->name = NULL;
1370 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1372 UNLOCK_THREAD (this_obj);
1374 if (this_obj->name && this_obj->tid) {
1375 char *tname = mono_string_to_utf8 (name);
1376 mono_profiler_thread_name (this_obj->tid, tname);
1377 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1383 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1385 mono_thread_set_name_internal (this_obj, name, TRUE);
1389 * ves_icall_System_Threading_Thread_GetPriority_internal:
1390 * @param this_obj: The MonoInternalThread on which to operate.
1392 * Gets the priority of the given thread.
1393 * @return: The priority of the given thread.
1396 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1399 MonoInternalThread *internal = this_obj->internal_thread;
1401 LOCK_THREAD (internal);
1402 priority = GetThreadPriority (internal->handle) + 2;
1403 UNLOCK_THREAD (internal);
1408 * ves_icall_System_Threading_Thread_SetPriority_internal:
1409 * @param this_obj: The MonoInternalThread on which to operate.
1410 * @param priority: The priority to set.
1412 * Sets the priority of the given thread.
1415 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1417 MonoInternalThread *internal = this_obj->internal_thread;
1419 LOCK_THREAD (internal);
1420 SetThreadPriority (internal->handle, priority - 2);
1421 UNLOCK_THREAD (internal);
1424 /* If the array is already in the requested domain, we just return it,
1425 otherwise we return a copy in that domain. */
1427 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1434 if (mono_object_domain (arr) == domain)
1437 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1438 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1443 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1445 return byte_array_to_domain (arr, mono_get_root_domain ());
1449 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1451 return byte_array_to_domain (arr, mono_domain_get ());
1455 mono_thread_current (void)
1458 MonoDomain *domain = mono_domain_get ();
1459 MonoInternalThread *internal = mono_thread_internal_current ();
1460 MonoThread **current_thread_ptr;
1462 g_assert (internal);
1463 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1465 if (!*current_thread_ptr) {
1466 g_assert (domain != mono_get_root_domain ());
1467 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1468 mono_error_raise_exception (&error); /* FIXME don't raise here */
1470 return *current_thread_ptr;
1473 /* Return the thread object belonging to INTERNAL in the current domain */
1475 mono_thread_current_for_thread (MonoInternalThread *internal)
1478 MonoDomain *domain = mono_domain_get ();
1479 MonoThread **current_thread_ptr;
1481 g_assert (internal);
1482 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1484 if (!*current_thread_ptr) {
1485 g_assert (domain != mono_get_root_domain ());
1486 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1487 mono_error_raise_exception (&error); /* FIXME don't raise here */
1489 return *current_thread_ptr;
1493 mono_thread_internal_current (void)
1495 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1496 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1501 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1503 MonoInternalThread *thread = this_obj->internal_thread;
1504 HANDLE handle = thread->handle;
1505 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1508 mono_thread_current_check_pending_interrupt ();
1510 LOCK_THREAD (thread);
1512 if ((thread->state & ThreadState_Unstarted) != 0) {
1513 UNLOCK_THREAD (thread);
1515 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1519 UNLOCK_THREAD (thread);
1524 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1526 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1528 MONO_PREPARE_BLOCKING;
1529 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1530 MONO_FINISH_BLOCKING;
1532 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1534 if(ret==WAIT_OBJECT_0) {
1535 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1540 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1546 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1554 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1556 MONO_PREPARE_BLOCKING;
1558 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1560 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1561 MONO_FINISH_BLOCKING;
1563 if (ret != WAIT_IO_COMPLETION)
1566 exc = mono_thread_execute_interruption ();
1568 mono_raise_exception (exc);
1573 /* Re-calculate ms according to the time passed */
1574 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1575 if (diff_ms >= ms) {
1579 wait = ms - diff_ms;
1585 /* FIXME: exitContext isnt documented */
1586 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1592 MonoObject *waitHandle;
1593 MonoInternalThread *thread = mono_thread_internal_current ();
1595 /* Do this WaitSleepJoin check before creating objects */
1596 mono_thread_current_check_pending_interrupt ();
1598 /* We fail in managed if the array has more than 64 elements */
1599 numhandles = (guint32)mono_array_length(mono_handles);
1600 handles = g_new0(HANDLE, numhandles);
1602 for(i = 0; i < numhandles; i++) {
1603 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1604 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1611 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1613 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1615 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1622 /* FIXME: exitContext isnt documented */
1623 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1625 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1626 uintptr_t numhandles;
1629 MonoObject *waitHandle;
1630 MonoInternalThread *thread = mono_thread_internal_current ();
1632 /* Do this WaitSleepJoin check before creating objects */
1633 mono_thread_current_check_pending_interrupt ();
1635 numhandles = mono_array_length(mono_handles);
1636 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1639 for(i = 0; i < numhandles; i++) {
1640 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1641 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1648 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1650 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1652 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1654 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1657 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1659 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1660 return ret - WAIT_OBJECT_0;
1662 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1663 return ret - WAIT_ABANDONED_0;
1670 /* FIXME: exitContext isnt documented */
1671 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms, gboolean exitContext)
1674 MonoInternalThread *thread = mono_thread_internal_current ();
1676 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1682 mono_thread_current_check_pending_interrupt ();
1684 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1686 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1688 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1694 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1697 MonoInternalThread *thread = mono_thread_internal_current ();
1702 mono_thread_current_check_pending_interrupt ();
1704 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1706 MONO_PREPARE_BLOCKING;
1707 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1708 MONO_FINISH_BLOCKING;
1710 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1715 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1722 mutex = CreateMutex (NULL, owned, NULL);
1724 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1726 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1734 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1735 return(ReleaseMutex (handle));
1738 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1744 *error = ERROR_SUCCESS;
1746 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1748 *error = GetLastError ();
1755 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1762 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1764 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1765 mono_string_chars (name));
1767 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1775 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1779 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1784 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1788 *error = ERROR_SUCCESS;
1790 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1792 *error = GetLastError ();
1798 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1805 event = CreateEvent (NULL, manual, initial, NULL);
1807 event = CreateEvent (NULL, manual, initial,
1808 mono_string_chars (name));
1810 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1818 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1819 return (SetEvent(handle));
1822 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1823 return (ResetEvent(handle));
1827 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1828 CloseHandle (handle);
1831 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1837 *error = ERROR_SUCCESS;
1839 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1841 *error = GetLastError ();
1847 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1849 return InterlockedIncrement (location);
1852 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1854 #if SIZEOF_VOID_P == 4
1855 if (G_UNLIKELY ((size_t)location & 0x7)) {
1857 mono_interlocked_lock ();
1860 mono_interlocked_unlock ();
1864 return InterlockedIncrement64 (location);
1867 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1869 return InterlockedDecrement(location);
1872 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1874 #if SIZEOF_VOID_P == 4
1875 if (G_UNLIKELY ((size_t)location & 0x7)) {
1877 mono_interlocked_lock ();
1880 mono_interlocked_unlock ();
1884 return InterlockedDecrement64 (location);
1887 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1889 return InterlockedExchange(location, value);
1892 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1895 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1896 mono_gc_wbarrier_generic_nostore (location);
1900 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1902 return InterlockedExchangePointer(location, value);
1905 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1907 IntFloatUnion val, ret;
1910 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1916 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1918 #if SIZEOF_VOID_P == 4
1919 if (G_UNLIKELY ((size_t)location & 0x7)) {
1921 mono_interlocked_lock ();
1924 mono_interlocked_unlock ();
1928 return InterlockedExchange64 (location, value);
1932 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1934 LongDoubleUnion val, ret;
1937 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1942 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1944 return InterlockedCompareExchange(location, value, comparand);
1947 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1949 gint32 r = InterlockedCompareExchange(location, value, comparand);
1950 *success = r == comparand;
1954 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1957 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1958 mono_gc_wbarrier_generic_nostore (location);
1962 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1964 return InterlockedCompareExchangePointer(location, value, comparand);
1967 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1969 IntFloatUnion val, ret, cmp;
1972 cmp.fval = comparand;
1973 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1979 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1981 #if SIZEOF_VOID_P == 8
1982 LongDoubleUnion val, comp, ret;
1985 comp.fval = comparand;
1986 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1992 mono_interlocked_lock ();
1994 if (old == comparand)
1996 mono_interlocked_unlock ();
2003 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2005 #if SIZEOF_VOID_P == 4
2006 if (G_UNLIKELY ((size_t)location & 0x7)) {
2008 mono_interlocked_lock ();
2010 if (old == comparand)
2012 mono_interlocked_unlock ();
2016 return InterlockedCompareExchange64 (location, value, comparand);
2020 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2023 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2024 mono_gc_wbarrier_generic_nostore (location);
2029 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2032 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2033 mono_gc_wbarrier_generic_nostore (location);
2038 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2040 return InterlockedAdd (location, value);
2044 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2046 #if SIZEOF_VOID_P == 4
2047 if (G_UNLIKELY ((size_t)location & 0x7)) {
2049 mono_interlocked_lock ();
2052 mono_interlocked_unlock ();
2056 return InterlockedAdd64 (location, value);
2060 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2062 #if SIZEOF_VOID_P == 4
2063 if (G_UNLIKELY ((size_t)location & 0x7)) {
2065 mono_interlocked_lock ();
2067 mono_interlocked_unlock ();
2071 return InterlockedRead64 (location);
2075 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2077 mono_memory_barrier ();
2081 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2083 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2085 if (state & ThreadState_Background) {
2086 /* If the thread changes the background mode, the main thread has to
2087 * be notified, since it has to rebuild the list of threads to
2090 SetEvent (background_change_event);
2095 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2097 mono_thread_set_state (this_obj, (MonoThreadState)state);
2099 if (state & ThreadState_Background) {
2100 /* If the thread changes the background mode, the main thread has to
2101 * be notified, since it has to rebuild the list of threads to
2104 SetEvent (background_change_event);
2109 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2113 LOCK_THREAD (this_obj);
2115 state = this_obj->state;
2117 UNLOCK_THREAD (this_obj);
2122 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2124 MonoInternalThread *current;
2126 MonoInternalThread *thread = this_obj->internal_thread;
2128 LOCK_THREAD (thread);
2130 current = mono_thread_internal_current ();
2132 thread->thread_interrupt_requested = TRUE;
2133 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2135 UNLOCK_THREAD (thread);
2138 async_abort_internal (thread, FALSE);
2142 void mono_thread_current_check_pending_interrupt ()
2144 MonoInternalThread *thread = mono_thread_internal_current ();
2145 gboolean throw_ = FALSE;
2147 LOCK_THREAD (thread);
2149 if (thread->thread_interrupt_requested) {
2151 thread->thread_interrupt_requested = FALSE;
2154 UNLOCK_THREAD (thread);
2157 mono_raise_exception (mono_get_exception_thread_interrupted ());
2162 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2164 LOCK_THREAD (thread);
2166 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2167 (thread->state & ThreadState_StopRequested) != 0 ||
2168 (thread->state & ThreadState_Stopped) != 0)
2170 UNLOCK_THREAD (thread);
2174 if ((thread->state & ThreadState_Unstarted) != 0) {
2175 thread->state |= ThreadState_Aborted;
2176 UNLOCK_THREAD (thread);
2180 thread->state |= ThreadState_AbortRequested;
2181 if (thread->abort_state_handle)
2182 mono_gchandle_free (thread->abort_state_handle);
2184 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2185 g_assert (thread->abort_state_handle);
2187 thread->abort_state_handle = 0;
2189 thread->abort_exc = NULL;
2191 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));
2193 /* During shutdown, we can't wait for other threads */
2195 /* Make sure the thread is awake */
2196 mono_thread_resume (thread);
2198 UNLOCK_THREAD (thread);
2200 if (thread == mono_thread_internal_current ())
2201 self_abort_internal ();
2203 async_abort_internal (thread, TRUE);
2207 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2209 MonoInternalThread *thread = mono_thread_internal_current ();
2210 gboolean was_aborting;
2212 LOCK_THREAD (thread);
2213 was_aborting = thread->state & ThreadState_AbortRequested;
2214 thread->state &= ~ThreadState_AbortRequested;
2215 UNLOCK_THREAD (thread);
2217 if (!was_aborting) {
2218 const char *msg = "Unable to reset abort because no abort was requested";
2219 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2222 thread->abort_exc = NULL;
2223 if (thread->abort_state_handle) {
2224 mono_gchandle_free (thread->abort_state_handle);
2225 /* This is actually not necessary - the handle
2226 only counts if the exception is set */
2227 thread->abort_state_handle = 0;
2232 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2234 LOCK_THREAD (thread);
2236 thread->state &= ~ThreadState_AbortRequested;
2238 if (thread->abort_exc) {
2239 thread->abort_exc = NULL;
2240 if (thread->abort_state_handle) {
2241 mono_gchandle_free (thread->abort_state_handle);
2242 /* This is actually not necessary - the handle
2243 only counts if the exception is set */
2244 thread->abort_state_handle = 0;
2248 UNLOCK_THREAD (thread);
2252 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2254 MonoInternalThread *thread = this_obj->internal_thread;
2255 MonoObject *state, *deserialized = NULL, *exc;
2258 if (!thread->abort_state_handle)
2261 state = mono_gchandle_get_target (thread->abort_state_handle);
2264 domain = mono_domain_get ();
2265 if (mono_object_domain (state) == domain)
2268 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2270 if (!deserialized) {
2271 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2273 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2274 mono_set_pending_exception (invalid_op_exc);
2278 return deserialized;
2282 mono_thread_suspend (MonoInternalThread *thread)
2284 LOCK_THREAD (thread);
2286 if ((thread->state & ThreadState_Unstarted) != 0 ||
2287 (thread->state & ThreadState_Aborted) != 0 ||
2288 (thread->state & ThreadState_Stopped) != 0)
2290 UNLOCK_THREAD (thread);
2294 if ((thread->state & ThreadState_Suspended) != 0 ||
2295 (thread->state & ThreadState_SuspendRequested) != 0 ||
2296 (thread->state & ThreadState_StopRequested) != 0)
2298 UNLOCK_THREAD (thread);
2302 thread->state |= ThreadState_SuspendRequested;
2304 if (thread == mono_thread_internal_current ()) {
2305 /* calls UNLOCK_THREAD (thread) */
2306 self_suspend_internal ();
2308 /* calls UNLOCK_THREAD (thread) */
2309 async_suspend_internal (thread, FALSE);
2316 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2318 if (!mono_thread_suspend (this_obj->internal_thread)) {
2319 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2324 /* LOCKING: LOCK_THREAD(thread) must be held */
2326 mono_thread_resume (MonoInternalThread *thread)
2328 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2329 thread->state &= ~ThreadState_SuspendRequested;
2333 if ((thread->state & ThreadState_Suspended) == 0 ||
2334 (thread->state & ThreadState_Unstarted) != 0 ||
2335 (thread->state & ThreadState_Aborted) != 0 ||
2336 (thread->state & ThreadState_Stopped) != 0)
2341 UNLOCK_THREAD (thread);
2343 /* Awake the thread */
2344 if (!mono_thread_info_resume (thread_get_tid (thread)))
2347 LOCK_THREAD (thread);
2349 thread->state &= ~ThreadState_Suspended;
2355 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2357 if (!thread->internal_thread) {
2358 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2360 LOCK_THREAD (thread->internal_thread);
2361 if (!mono_thread_resume (thread->internal_thread))
2362 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2363 UNLOCK_THREAD (thread->internal_thread);
2368 mono_threads_is_critical_method (MonoMethod *method)
2370 switch (method->wrapper_type) {
2371 case MONO_WRAPPER_RUNTIME_INVOKE:
2372 case MONO_WRAPPER_XDOMAIN_INVOKE:
2373 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2380 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2385 if (mono_threads_is_critical_method (m)) {
2386 *((gboolean*)data) = TRUE;
2393 is_running_protected_wrapper (void)
2395 gboolean found = FALSE;
2396 mono_stack_walk (find_wrapper, &found);
2400 void mono_thread_internal_stop (MonoInternalThread *thread)
2402 LOCK_THREAD (thread);
2404 if ((thread->state & ThreadState_StopRequested) != 0 ||
2405 (thread->state & ThreadState_Stopped) != 0)
2407 UNLOCK_THREAD (thread);
2411 /* Make sure the thread is awake */
2412 mono_thread_resume (thread);
2414 thread->state |= ThreadState_StopRequested;
2415 thread->state &= ~ThreadState_AbortRequested;
2417 UNLOCK_THREAD (thread);
2419 if (thread == mono_thread_internal_current ())
2420 self_abort_internal ();
2422 async_abort_internal (thread, TRUE);
2425 void mono_thread_stop (MonoThread *thread)
2427 mono_thread_internal_stop (thread->internal_thread);
2431 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2433 gint8 tmp = *(volatile gint8 *)ptr;
2434 mono_memory_barrier ();
2439 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2441 gint16 tmp = *(volatile gint16 *)ptr;
2442 mono_memory_barrier ();
2447 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2449 gint32 tmp = *(volatile gint32 *)ptr;
2450 mono_memory_barrier ();
2455 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2457 gint64 tmp = *(volatile gint64 *)ptr;
2458 mono_memory_barrier ();
2463 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2465 volatile void *tmp = *(volatile void **)ptr;
2466 mono_memory_barrier ();
2467 return (void *) tmp;
2471 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2473 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2474 mono_memory_barrier ();
2475 return (MonoObject *) tmp;
2479 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2481 double tmp = *(volatile double *)ptr;
2482 mono_memory_barrier ();
2487 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2489 float tmp = *(volatile float *)ptr;
2490 mono_memory_barrier ();
2495 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2497 return InterlockedRead8 ((volatile gint8 *)ptr);
2501 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2503 return InterlockedRead16 ((volatile gint16 *)ptr);
2507 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2509 return InterlockedRead ((volatile gint32 *)ptr);
2513 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2515 #if SIZEOF_VOID_P == 4
2516 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2518 mono_interlocked_lock ();
2519 val = *(gint64*)ptr;
2520 mono_interlocked_unlock ();
2524 return InterlockedRead64 ((volatile gint64 *)ptr);
2528 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2530 return InterlockedReadPointer ((volatile gpointer *)ptr);
2534 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2538 #if SIZEOF_VOID_P == 4
2539 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2541 mono_interlocked_lock ();
2542 val = *(double*)ptr;
2543 mono_interlocked_unlock ();
2548 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2554 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2558 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2564 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2566 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2570 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2572 mono_memory_barrier ();
2573 *(volatile gint8 *)ptr = value;
2577 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2579 mono_memory_barrier ();
2580 *(volatile gint16 *)ptr = value;
2584 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2586 mono_memory_barrier ();
2587 *(volatile gint32 *)ptr = value;
2591 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2593 mono_memory_barrier ();
2594 *(volatile gint64 *)ptr = value;
2598 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2600 mono_memory_barrier ();
2601 *(volatile void **)ptr = value;
2605 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2607 mono_memory_barrier ();
2608 mono_gc_wbarrier_generic_store (ptr, value);
2612 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2614 mono_memory_barrier ();
2615 *(volatile double *)ptr = value;
2619 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2621 mono_memory_barrier ();
2622 *(volatile float *)ptr = value;
2626 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2628 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2632 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2634 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2638 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2640 InterlockedWrite ((volatile gint32 *)ptr, value);
2644 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2646 #if SIZEOF_VOID_P == 4
2647 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2648 mono_interlocked_lock ();
2649 *(gint64*)ptr = value;
2650 mono_interlocked_unlock ();
2655 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2659 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2661 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2665 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2669 #if SIZEOF_VOID_P == 4
2670 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2671 mono_interlocked_lock ();
2672 *(double*)ptr = value;
2673 mono_interlocked_unlock ();
2680 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2684 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2690 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2694 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2696 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2700 free_context (void *user_data)
2702 ContextStaticData *data = user_data;
2704 mono_threads_lock ();
2707 * There is no guarantee that, by the point this reference queue callback
2708 * has been invoked, the GC handle associated with the object will fail to
2709 * resolve as one might expect. So if we don't free and remove the GC
2710 * handle here, free_context_static_data_helper () could end up resolving
2711 * a GC handle to an actually-dead context which would contain a pointer
2712 * to an already-freed static data segment, resulting in a crash when
2715 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2717 mono_threads_unlock ();
2719 mono_gchandle_free (data->gc_handle);
2720 mono_free_static_data (data->static_data);
2725 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2727 mono_threads_lock ();
2729 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2732 contexts = g_hash_table_new (NULL, NULL);
2735 context_queue = mono_gc_reference_queue_new (free_context);
2737 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2738 g_hash_table_insert (contexts, gch, gch);
2741 * We use this intermediate structure to contain a duplicate pointer to
2742 * the static data because we can't rely on being able to resolve the GC
2743 * handle in the reference queue callback.
2745 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2746 data->gc_handle = GPOINTER_TO_UINT (gch);
2749 context_adjust_static_data (ctx);
2750 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2752 mono_threads_unlock ();
2754 mono_profiler_context_loaded (ctx);
2758 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2761 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2762 * cleanup in exceptional circumstances, we don't actually do any
2763 * cleanup work here. We instead do this via a reference queue.
2766 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2768 mono_profiler_context_unloaded (ctx);
2772 mono_thread_init_tls (void)
2774 MONO_FAST_TLS_INIT (tls_current_object);
2775 mono_native_tls_alloc (¤t_object_key, NULL);
2778 void mono_thread_init (MonoThreadStartCB start_cb,
2779 MonoThreadAttachCB attach_cb)
2781 mono_coop_mutex_init_recursive (&threads_mutex);
2783 mono_os_mutex_init_recursive(&interlocked_mutex);
2784 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2786 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2787 g_assert(background_change_event != NULL);
2789 mono_init_static_data_info (&thread_static_info);
2790 mono_init_static_data_info (&context_static_info);
2792 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2794 mono_thread_start_cb = start_cb;
2795 mono_thread_attach_cb = attach_cb;
2797 /* Get a pseudo handle to the current process. This is just a
2798 * kludge so that wapi can build a process handle if needed.
2799 * As a pseudo handle is returned, we don't need to clean
2802 GetCurrentProcess ();
2805 void mono_thread_cleanup (void)
2807 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2808 MonoThreadInfo *info;
2810 /* The main thread must abandon any held mutexes (particularly
2811 * important for named mutexes as they are shared across
2812 * processes, see bug 74680.) This will happen when the
2813 * thread exits, but if it's not running in a subthread it
2814 * won't exit in time.
2816 info = mono_thread_info_current ();
2817 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2821 /* This stuff needs more testing, it seems one of these
2822 * critical sections can be locked when mono_thread_cleanup is
2825 mono_coop_mutex_destroy (&threads_mutex);
2826 mono_os_mutex_destroy (&interlocked_mutex);
2827 mono_os_mutex_destroy (&delayed_free_table_mutex);
2828 mono_os_mutex_destroy (&small_id_mutex);
2829 CloseHandle (background_change_event);
2832 mono_native_tls_free (current_object_key);
2836 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2838 mono_thread_cleanup_fn = func;
2842 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2844 thread->internal_thread->manage_callback = func;
2848 static void print_tids (gpointer key, gpointer value, gpointer user)
2850 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2851 * sizeof(uint) and a cast to uint would overflow
2853 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2854 * print this as a pointer.
2856 g_message ("Waiting for: %p", key);
2861 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2862 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2866 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2870 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2872 MONO_PREPARE_BLOCKING;
2873 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2874 MONO_FINISH_BLOCKING;
2876 if(ret==WAIT_FAILED) {
2877 /* See the comment in build_wait_tids() */
2878 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2882 for(i=0; i<wait->num; i++)
2883 CloseHandle (wait->handles[i]);
2885 if (ret == WAIT_TIMEOUT)
2888 for(i=0; i<wait->num; i++) {
2889 gsize tid = wait->threads[i]->tid;
2892 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2893 * it can still run io-layer etc. code. So wait for it to really exit.
2894 * FIXME: This won't join threads which are not in the joinable_hash yet.
2896 mono_thread_join ((gpointer)tid);
2898 mono_threads_lock ();
2899 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2900 /* This thread must have been killed, because
2901 * it hasn't cleaned itself up. (It's just
2902 * possible that the thread exited before the
2903 * parent thread had a chance to store the
2904 * handle, and now there is another pointer to
2905 * the already-exited thread stored. In this
2906 * case, we'll just get two
2907 * mono_profiler_thread_end() calls for the
2911 mono_threads_unlock ();
2912 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2913 thread_cleanup (wait->threads[i]);
2915 mono_threads_unlock ();
2920 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2922 guint32 i, ret, count;
2924 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2926 /* Add the thread state change event, so it wakes up if a thread changes
2927 * to background mode.
2930 if (count < MAXIMUM_WAIT_OBJECTS) {
2931 wait->handles [count] = background_change_event;
2935 MONO_PREPARE_BLOCKING;
2936 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2937 MONO_FINISH_BLOCKING;
2939 if(ret==WAIT_FAILED) {
2940 /* See the comment in build_wait_tids() */
2941 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2945 for(i=0; i<wait->num; i++)
2946 CloseHandle (wait->handles[i]);
2948 if (ret == WAIT_TIMEOUT)
2951 if (ret < wait->num) {
2952 gsize tid = wait->threads[ret]->tid;
2953 mono_threads_lock ();
2954 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2955 /* See comment in wait_for_tids about thread cleanup */
2956 mono_threads_unlock ();
2957 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2958 thread_cleanup (wait->threads [ret]);
2960 mono_threads_unlock ();
2964 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2966 struct wait_data *wait=(struct wait_data *)user;
2968 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2970 MonoInternalThread *thread=(MonoInternalThread *)value;
2972 /* Ignore background threads, we abort them later */
2973 /* Do not lock here since it is not needed and the caller holds threads_lock */
2974 if (thread->state & ThreadState_Background) {
2975 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2976 return; /* just leave, ignore */
2979 if (mono_gc_is_finalizer_internal_thread (thread)) {
2980 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2984 if (thread == mono_thread_internal_current ()) {
2985 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2989 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2990 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2994 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2995 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2999 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3000 if (handle == NULL) {
3001 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3005 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3006 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3007 wait->handles[wait->num]=handle;
3008 wait->threads[wait->num]=thread;
3011 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3013 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3018 /* Just ignore the rest, we can't do anything with
3025 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3027 struct wait_data *wait=(struct wait_data *)user;
3028 MonoNativeThreadId self = mono_native_thread_id_get ();
3029 MonoInternalThread *thread = (MonoInternalThread *)value;
3032 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3035 /* The finalizer thread is not a background thread */
3036 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3037 && (thread->state & ThreadState_Background) != 0
3038 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3040 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3044 /* printf ("A: %d\n", wait->num); */
3045 wait->handles[wait->num]=thread->handle;
3046 wait->threads[wait->num]=thread;
3049 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3050 mono_thread_internal_stop (thread);
3054 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3055 && !mono_gc_is_finalizer_internal_thread (thread);
3059 * mono_threads_set_shutting_down:
3061 * Is called by a thread that wants to shut down Mono. If the runtime is already
3062 * shutting down, the calling thread is suspended/stopped, and this function never
3066 mono_threads_set_shutting_down (void)
3068 MonoInternalThread *current_thread = mono_thread_internal_current ();
3070 mono_threads_lock ();
3072 if (shutting_down) {
3073 mono_threads_unlock ();
3075 /* Make sure we're properly suspended/stopped */
3077 LOCK_THREAD (current_thread);
3079 if ((current_thread->state & ThreadState_SuspendRequested) ||
3080 (current_thread->state & ThreadState_AbortRequested) ||
3081 (current_thread->state & ThreadState_StopRequested)) {
3082 UNLOCK_THREAD (current_thread);
3083 mono_thread_execute_interruption ();
3085 current_thread->state |= ThreadState_Stopped;
3086 UNLOCK_THREAD (current_thread);
3089 /*since we're killing the thread, unset the current domain.*/
3090 mono_domain_unset ();
3092 /* Wake up other threads potentially waiting for us */
3093 mono_thread_info_exit ();
3095 shutting_down = TRUE;
3097 /* Not really a background state change, but this will
3098 * interrupt the main thread if it is waiting for all
3099 * the other threads.
3101 SetEvent (background_change_event);
3103 mono_threads_unlock ();
3107 void mono_thread_manage (void)
3109 struct wait_data wait_data;
3110 struct wait_data *wait = &wait_data;
3112 memset (wait, 0, sizeof (struct wait_data));
3113 /* join each thread that's still running */
3114 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3116 mono_threads_lock ();
3118 THREAD_DEBUG (g_message("%s: No threads", __func__));
3119 mono_threads_unlock ();
3122 mono_threads_unlock ();
3125 mono_threads_lock ();
3126 if (shutting_down) {
3127 /* somebody else is shutting down */
3128 mono_threads_unlock ();
3131 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3132 mono_g_hash_table_foreach (threads, print_tids, NULL));
3134 ResetEvent (background_change_event);
3136 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3137 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3138 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3139 mono_threads_unlock ();
3141 /* Something to wait for */
3142 wait_for_tids_or_state_change (wait, INFINITE);
3144 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3145 } while(wait->num>0);
3147 /* Mono is shutting down, so just wait for the end */
3148 if (!mono_runtime_try_shutdown ()) {
3149 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3150 mono_thread_suspend (mono_thread_internal_current ());
3151 mono_thread_execute_interruption ();
3155 * Remove everything but the finalizer thread and self.
3156 * Also abort all the background threads
3159 mono_threads_lock ();
3162 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3163 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3164 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3166 mono_threads_unlock ();
3168 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3170 /* Something to wait for */
3171 wait_for_tids (wait, INFINITE);
3173 } while (wait->num > 0);
3176 * give the subthreads a chance to really quit (this is mainly needed
3177 * to get correct user and system times from getrusage/wait/time(1)).
3178 * This could be removed if we avoid pthread_detach() and use pthread_join().
3180 mono_thread_info_yield ();
3184 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3186 MonoInternalThread *thread = (MonoInternalThread*)value;
3187 struct wait_data *wait = (struct wait_data*)user_data;
3191 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3193 * This needs no locking.
3195 if ((thread->state & ThreadState_Suspended) != 0 ||
3196 (thread->state & ThreadState_Stopped) != 0)
3199 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3200 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3204 wait->handles [wait->num] = handle;
3205 wait->threads [wait->num] = thread;
3211 * mono_thread_suspend_all_other_threads:
3213 * Suspend all managed threads except the finalizer thread and this thread. It is
3214 * not possible to resume them later.
3216 void mono_thread_suspend_all_other_threads (void)
3218 struct wait_data wait_data;
3219 struct wait_data *wait = &wait_data;
3221 MonoNativeThreadId self = mono_native_thread_id_get ();
3222 guint32 eventidx = 0;
3223 gboolean starting, finished;
3225 memset (wait, 0, sizeof (struct wait_data));
3227 * The other threads could be in an arbitrary state at this point, i.e.
3228 * they could be starting up, shutting down etc. This means that there could be
3229 * threads which are not even in the threads hash table yet.
3233 * First we set a barrier which will be checked by all threads before they
3234 * are added to the threads hash table, and they will exit if the flag is set.
3235 * This ensures that no threads could be added to the hash later.
3236 * We will use shutting_down as the barrier for now.
3238 g_assert (shutting_down);
3241 * We make multiple calls to WaitForMultipleObjects since:
3242 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3243 * - some threads could exit without becoming suspended
3248 * Make a copy of the hashtable since we can't do anything with
3249 * threads while threads_mutex is held.
3252 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3253 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3254 mono_threads_lock ();
3255 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3256 mono_threads_unlock ();
3259 /* Get the suspended events that we'll be waiting for */
3260 for (i = 0; i < wait->num; ++i) {
3261 MonoInternalThread *thread = wait->threads [i];
3263 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3264 || mono_gc_is_finalizer_internal_thread (thread)
3265 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3267 //CloseHandle (wait->handles [i]);
3268 wait->threads [i] = NULL; /* ignore this thread in next loop */
3272 LOCK_THREAD (thread);
3274 if ((thread->state & ThreadState_Suspended) != 0 ||
3275 (thread->state & ThreadState_StopRequested) != 0 ||
3276 (thread->state & ThreadState_Stopped) != 0) {
3277 UNLOCK_THREAD (thread);
3278 CloseHandle (wait->handles [i]);
3279 wait->threads [i] = NULL; /* ignore this thread in next loop */
3285 /* Convert abort requests into suspend requests */
3286 if ((thread->state & ThreadState_AbortRequested) != 0)
3287 thread->state &= ~ThreadState_AbortRequested;
3289 thread->state |= ThreadState_SuspendRequested;
3291 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3292 async_suspend_internal (thread, TRUE);
3294 if (eventidx <= 0) {
3296 * If there are threads which are starting up, we wait until they
3297 * are suspended when they try to register in the threads hash.
3298 * This is guaranteed to finish, since the threads which can create new
3299 * threads get suspended after a while.
3300 * FIXME: The finalizer thread can still create new threads.
3302 mono_threads_lock ();
3303 if (threads_starting_up)
3304 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3307 mono_threads_unlock ();
3309 mono_thread_info_sleep (100, NULL);
3317 MonoInternalThread *thread;
3318 MonoStackFrameInfo *frames;
3319 int nframes, max_frames;
3320 int nthreads, max_threads;
3321 MonoInternalThread **threads;
3322 } ThreadDumpUserData;
3324 static gboolean thread_dump_requested;
3326 /* This needs to be async safe */
3328 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3330 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3332 if (ud->nframes < ud->max_frames) {
3333 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3340 /* This needs to be async safe */
3341 static SuspendThreadResult
3342 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3344 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3345 MonoInternalThread *thread = user_data->thread;
3348 /* This no longer works with remote unwinding */
3350 wapi_desc = wapi_current_thread_desc ();
3351 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3356 if (thread == mono_thread_internal_current ())
3357 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3359 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3361 return MonoResumeThread;
3365 int nthreads, max_threads;
3366 MonoInternalThread **threads;
3367 } CollectThreadsUserData;
3370 collect_thread (gpointer key, gpointer value, gpointer user)
3372 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3373 MonoInternalThread *thread = (MonoInternalThread *)value;
3375 if (ud->nthreads < ud->max_threads)
3376 ud->threads [ud->nthreads ++] = thread;
3380 * Collect running threads into the THREADS array.
3381 * THREADS should be an array allocated on the stack.
3384 collect_threads (MonoInternalThread **thread_array, int max_threads)
3386 CollectThreadsUserData ud;
3388 memset (&ud, 0, sizeof (ud));
3389 /* This array contains refs, but its on the stack, so its ok */
3390 ud.threads = thread_array;
3391 ud.max_threads = max_threads;
3393 mono_threads_lock ();
3394 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3395 mono_threads_unlock ();
3401 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3403 GString* text = g_string_new (0);
3405 GError *error = NULL;
3408 ud->thread = thread;
3411 /* Collect frames for the thread */
3412 if (thread == mono_thread_internal_current ()) {
3413 get_thread_dump (mono_thread_info_current (), ud);
3415 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3419 * Do all the non async-safe work outside of get_thread_dump.
3422 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3424 g_string_append_printf (text, "\n\"%s\"", name);
3427 else if (thread->threadpool_thread) {
3428 g_string_append (text, "\n\"<threadpool thread>\"");
3430 g_string_append (text, "\n\"<unnamed thread>\"");
3433 for (i = 0; i < ud->nframes; ++i) {
3434 MonoStackFrameInfo *frame = &ud->frames [i];
3435 MonoMethod *method = NULL;
3437 if (frame->type == FRAME_TYPE_MANAGED)
3438 method = mono_jit_info_get_method (frame->ji);
3441 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3442 g_string_append_printf (text, " %s\n", location);
3445 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3449 fprintf (stdout, "%s", text->str);
3451 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3452 OutputDebugStringA(text->str);
3455 g_string_free (text, TRUE);
3460 mono_threads_perform_thread_dump (void)
3462 ThreadDumpUserData ud;
3463 MonoInternalThread *thread_array [128];
3464 int tindex, nthreads;
3466 if (!thread_dump_requested)
3469 printf ("Full thread dump:\n");
3471 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3472 nthreads = collect_threads (thread_array, 128);
3474 memset (&ud, 0, sizeof (ud));
3475 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3476 ud.max_frames = 256;
3478 for (tindex = 0; tindex < nthreads; ++tindex)
3479 dump_thread (thread_array [tindex], &ud);
3483 thread_dump_requested = FALSE;
3486 /* Obtain the thread dump of all threads */
3488 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3492 ThreadDumpUserData ud;
3493 MonoInternalThread *thread_array [128];
3494 MonoDomain *domain = mono_domain_get ();
3495 MonoDebugSourceLocation *location;
3496 int tindex, nthreads;
3498 mono_error_init (&error);
3500 *out_threads = NULL;
3501 *out_stack_frames = NULL;
3503 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3504 nthreads = collect_threads (thread_array, 128);
3506 memset (&ud, 0, sizeof (ud));
3507 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3508 ud.max_frames = 256;
3510 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3511 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3513 for (tindex = 0; tindex < nthreads; ++tindex) {
3514 MonoInternalThread *thread = thread_array [tindex];
3515 MonoArray *thread_frames;
3521 /* Collect frames for the thread */
3522 if (thread == mono_thread_internal_current ()) {
3523 get_thread_dump (mono_thread_info_current (), &ud);
3525 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3528 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3530 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3531 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3533 for (i = 0; i < ud.nframes; ++i) {
3534 MonoStackFrameInfo *frame = &ud.frames [i];
3535 MonoMethod *method = NULL;
3536 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3537 if (!mono_error_ok (&error))
3540 sf->native_offset = frame->native_offset;
3542 if (frame->type == FRAME_TYPE_MANAGED)
3543 method = mono_jit_info_get_method (frame->ji);
3546 sf->method_address = (gsize) frame->ji->code_start;
3548 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3549 mono_error_raise_exception (&error); /* FIXME don't raise here */
3550 MONO_OBJECT_SETREF (sf, method, rm);
3552 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3554 sf->il_offset = location->il_offset;
3556 if (location && location->source_file) {
3557 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3558 sf->line = location->row;
3559 sf->column = location->column;
3561 mono_debug_free_source_location (location);
3566 mono_array_setref (thread_frames, i, sf);
3572 mono_error_raise_exception (&error); /* FIXME don't raise here */
3576 * mono_threads_request_thread_dump:
3578 * Ask all threads except the current to print their stacktrace to stdout.
3581 mono_threads_request_thread_dump (void)
3583 /*The new thread dump code runs out of the finalizer thread. */
3584 thread_dump_requested = TRUE;
3585 mono_gc_finalize_notify ();
3590 gint allocated; /* +1 so that refs [allocated] == NULL */
3594 typedef struct ref_stack RefStack;
3597 ref_stack_new (gint initial_size)
3601 initial_size = MAX (initial_size, 16) + 1;
3602 rs = g_new0 (RefStack, 1);
3603 rs->refs = g_new0 (gpointer, initial_size);
3604 rs->allocated = initial_size;
3609 ref_stack_destroy (gpointer ptr)
3611 RefStack *rs = (RefStack *)ptr;
3620 ref_stack_push (RefStack *rs, gpointer ptr)
3622 g_assert (rs != NULL);
3624 if (rs->bottom >= rs->allocated) {
3625 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3626 rs->allocated <<= 1;
3627 rs->refs [rs->allocated] = NULL;
3629 rs->refs [rs->bottom++] = ptr;
3633 ref_stack_pop (RefStack *rs)
3635 if (rs == NULL || rs->bottom == 0)
3639 rs->refs [rs->bottom] = NULL;
3643 ref_stack_find (RefStack *rs, gpointer ptr)
3650 for (refs = rs->refs; refs && *refs; refs++) {
3658 * mono_thread_push_appdomain_ref:
3660 * Register that the current thread may have references to objects in domain
3661 * @domain on its stack. Each call to this function should be paired with a
3662 * call to pop_appdomain_ref.
3665 mono_thread_push_appdomain_ref (MonoDomain *domain)
3667 MonoInternalThread *thread = mono_thread_internal_current ();
3670 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3671 SPIN_LOCK (thread->lock_thread_id);
3672 if (thread->appdomain_refs == NULL)
3673 thread->appdomain_refs = ref_stack_new (16);
3674 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3675 SPIN_UNLOCK (thread->lock_thread_id);
3680 mono_thread_pop_appdomain_ref (void)
3682 MonoInternalThread *thread = mono_thread_internal_current ();
3685 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3686 SPIN_LOCK (thread->lock_thread_id);
3687 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3688 SPIN_UNLOCK (thread->lock_thread_id);
3693 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3696 SPIN_LOCK (thread->lock_thread_id);
3697 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3698 SPIN_UNLOCK (thread->lock_thread_id);
3703 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3705 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3708 typedef struct abort_appdomain_data {
3709 struct wait_data wait;
3711 } abort_appdomain_data;
3714 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3716 MonoInternalThread *thread = (MonoInternalThread*)value;
3717 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3718 MonoDomain *domain = data->domain;
3720 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3721 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3723 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3724 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3727 data->wait.handles [data->wait.num] = handle;
3728 data->wait.threads [data->wait.num] = thread;
3731 /* Just ignore the rest, we can't do anything with
3739 * mono_threads_abort_appdomain_threads:
3741 * Abort threads which has references to the given appdomain.
3744 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3746 #ifdef __native_client__
3750 abort_appdomain_data user_data;
3752 int orig_timeout = timeout;
3755 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3757 start_time = mono_msec_ticks ();
3759 mono_threads_lock ();
3761 user_data.domain = domain;
3762 user_data.wait.num = 0;
3763 /* This shouldn't take any locks */
3764 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3765 mono_threads_unlock ();
3767 if (user_data.wait.num > 0) {
3768 /* Abort the threads outside the threads lock */
3769 for (i = 0; i < user_data.wait.num; ++i)
3770 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3773 * We should wait for the threads either to abort, or to leave the
3774 * domain. We can't do the latter, so we wait with a timeout.
3776 wait_for_tids (&user_data.wait, 100);
3779 /* Update remaining time */
3780 timeout -= mono_msec_ticks () - start_time;
3781 start_time = mono_msec_ticks ();
3783 if (orig_timeout != -1 && timeout < 0)
3786 while (user_data.wait.num > 0);
3788 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3794 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3796 MonoInternalThread *thread = (MonoInternalThread*)value;
3797 MonoDomain *domain = (MonoDomain*)user_data;
3800 /* No locking needed here */
3801 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3803 if (thread->cached_culture_info) {
3804 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3805 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3806 if (obj && obj->vtable->domain == domain)
3807 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3813 * mono_threads_clear_cached_culture:
3815 * Clear the cached_current_culture from all threads if it is in the
3819 mono_threads_clear_cached_culture (MonoDomain *domain)
3821 mono_threads_lock ();
3822 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3823 mono_threads_unlock ();
3827 * mono_thread_get_undeniable_exception:
3829 * Return an exception which needs to be raised when leaving a catch clause.
3830 * This is used for undeniable exception propagation.
3833 mono_thread_get_undeniable_exception (void)
3835 MonoInternalThread *thread = mono_thread_internal_current ();
3837 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3839 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3840 * exception if the thread no longer references a dying appdomain.
3842 thread->abort_exc->trace_ips = NULL;
3843 thread->abort_exc->stack_trace = NULL;
3844 return thread->abort_exc;
3850 #if MONO_SMALL_CONFIG
3851 #define NUM_STATIC_DATA_IDX 4
3852 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3856 #define NUM_STATIC_DATA_IDX 8
3857 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3858 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3862 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3863 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3866 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3868 gpointer *static_data = (gpointer *)addr;
3870 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3871 void **ptr = (void **)static_data [i];
3876 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3877 void **p = ptr + idx;
3880 mark_func ((MonoObject**)p, gc_data);
3886 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3888 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3892 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3894 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3898 * mono_alloc_static_data
3900 * Allocate memory blocks for storing threads or context static data
3903 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3905 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3908 gpointer* static_data = *static_data_ptr;
3910 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3911 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3913 if (mono_gc_user_markers_supported ()) {
3914 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3915 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3917 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3918 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3921 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3922 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3923 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3924 *static_data_ptr = static_data;
3925 static_data [0] = static_data;
3928 for (i = 1; i <= idx; ++i) {
3929 if (static_data [i])
3932 if (mono_gc_user_markers_supported ())
3933 static_data [i] = g_malloc0 (static_data_size [i]);
3935 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3936 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3937 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3942 mono_free_static_data (gpointer* static_data)
3945 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3946 gpointer p = static_data [i];
3950 * At this point, the static data pointer array is still registered with the
3951 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3952 * data. Freeing the individual arrays without first nulling their slots
3953 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3954 * such an already freed array. See bug #13813.
3956 static_data [i] = NULL;
3957 mono_memory_write_barrier ();
3958 if (mono_gc_user_markers_supported ())
3961 mono_gc_free_fixed (p);
3963 mono_gc_free_fixed (static_data);
3967 * mono_init_static_data_info
3969 * Initializes static data counters
3971 static void mono_init_static_data_info (StaticDataInfo *static_data)
3973 static_data->idx = 0;
3974 static_data->offset = 0;
3975 static_data->freelist = NULL;
3979 * mono_alloc_static_data_slot
3981 * Generates an offset for static data. static_data contains the counters
3982 * used to generate it.
3985 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3987 if (!static_data->idx && !static_data->offset) {
3989 * we use the first chunk of the first allocation also as
3990 * an array for the rest of the data
3992 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3994 static_data->offset += align - 1;
3995 static_data->offset &= ~(align - 1);
3996 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3997 static_data->idx ++;
3998 g_assert (size <= static_data_size [static_data->idx]);
3999 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4000 static_data->offset = 0;
4002 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4003 static_data->offset += size;
4008 * ensure thread static fields already allocated are valid for thread
4009 * This function is called when a thread is created or on thread attach.
4012 thread_adjust_static_data (MonoInternalThread *thread)
4014 mono_threads_lock ();
4015 if (thread_static_info.offset || thread_static_info.idx > 0) {
4016 /* get the current allocated size */
4017 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4018 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4020 mono_threads_unlock ();
4024 * LOCKING: requires that threads_mutex is held
4027 context_adjust_static_data (MonoAppContext *ctx)
4029 if (context_static_info.offset || context_static_info.idx > 0) {
4030 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4031 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4032 ctx->data->static_data = ctx->static_data;
4037 * LOCKING: requires that threads_mutex is held
4040 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4042 MonoInternalThread *thread = (MonoInternalThread *)value;
4043 guint32 offset = GPOINTER_TO_UINT (user);
4045 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4049 * LOCKING: requires that threads_mutex is held
4052 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4054 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4059 guint32 offset = GPOINTER_TO_UINT (user);
4060 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4061 ctx->data->static_data = ctx->static_data;
4064 static StaticDataFreeList*
4065 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4067 StaticDataFreeList* prev = NULL;
4068 StaticDataFreeList* tmp = static_data->freelist;
4070 if (tmp->size == size) {
4072 prev->next = tmp->next;
4074 static_data->freelist = tmp->next;
4083 #if SIZEOF_VOID_P == 4
4090 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4092 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4094 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4095 MonoBitSet *rb = sets [idx];
4096 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4097 offset /= sizeof (uintptr_t);
4098 /* offset is now the bitmap offset */
4099 for (int i = 0; i < numbits; ++i) {
4100 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4101 mono_bitset_set_fast (rb, offset + i);
4106 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4108 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4109 MonoBitSet *rb = sets [idx];
4110 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4111 offset /= sizeof (uintptr_t);
4112 /* offset is now the bitmap offset */
4113 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4114 mono_bitset_clear_fast (rb, offset + i);
4118 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4120 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4122 StaticDataInfo *info;
4125 if (static_type == SPECIAL_STATIC_THREAD) {
4126 info = &thread_static_info;
4127 sets = thread_reference_bitmaps;
4129 info = &context_static_info;
4130 sets = context_reference_bitmaps;
4133 mono_threads_lock ();
4135 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4139 offset = item->offset;
4142 offset = mono_alloc_static_data_slot (info, size, align);
4145 update_reference_bitmap (sets, offset, bitmap, numbits);
4147 if (static_type == SPECIAL_STATIC_THREAD) {
4148 /* This can be called during startup */
4149 if (threads != NULL)
4150 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4152 if (contexts != NULL)
4153 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4155 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4158 mono_threads_unlock ();
4164 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4166 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4168 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4169 return get_thread_static_data (thread, offset);
4171 return get_context_static_data (thread->current_appcontext, offset);
4176 mono_get_special_static_data (guint32 offset)
4178 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4187 * LOCKING: requires that threads_mutex is held
4190 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4192 MonoInternalThread *thread = (MonoInternalThread *)value;
4193 OffsetSize *data = (OffsetSize *)user;
4194 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4195 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4198 if (!thread->static_data || !thread->static_data [idx])
4200 ptr = ((char*) thread->static_data [idx]) + off;
4201 mono_gc_bzero_atomic (ptr, data->size);
4205 * LOCKING: requires that threads_mutex is held
4208 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4210 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4215 OffsetSize *data = (OffsetSize *)user;
4216 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4217 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4220 if (!ctx->static_data || !ctx->static_data [idx])
4223 ptr = ((char*) ctx->static_data [idx]) + off;
4224 mono_gc_bzero_atomic (ptr, data->size);
4228 do_free_special_slot (guint32 offset, guint32 size)
4230 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4232 StaticDataInfo *info;
4234 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4235 info = &thread_static_info;
4236 sets = thread_reference_bitmaps;
4238 info = &context_static_info;
4239 sets = context_reference_bitmaps;
4242 guint32 data_offset = offset;
4243 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4244 OffsetSize data = { data_offset, size };
4246 clear_reference_bitmap (sets, data.offset, data.size);
4248 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4249 if (threads != NULL)
4250 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4252 if (contexts != NULL)
4253 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4256 if (!mono_runtime_is_shutting_down ()) {
4257 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4259 item->offset = offset;
4262 item->next = info->freelist;
4263 info->freelist = item;
4268 do_free_special (gpointer key, gpointer value, gpointer data)
4270 MonoClassField *field = (MonoClassField *)key;
4271 guint32 offset = GPOINTER_TO_UINT (value);
4274 size = mono_type_size (field->type, &align);
4275 do_free_special_slot (offset, size);
4279 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4281 mono_threads_lock ();
4283 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4285 mono_threads_unlock ();
4289 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4291 /* Only ever called for ThreadLocal instances */
4292 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4294 mono_threads_lock ();
4295 do_free_special_slot (offset, size);
4296 mono_threads_unlock ();
4300 static void CALLBACK dummy_apc (ULONG_PTR param)
4306 * mono_thread_execute_interruption
4308 * Performs the operation that the requested thread state requires (abort,
4311 static MonoException*
4312 mono_thread_execute_interruption (void)
4314 MonoInternalThread *thread = mono_thread_internal_current ();
4315 MonoThread *sys_thread = mono_thread_current ();
4317 LOCK_THREAD (thread);
4319 /* MonoThread::interruption_requested can only be changed with atomics */
4320 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4321 /* this will consume pending APC calls */
4323 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4325 InterlockedDecrement (&thread_interruption_requested);
4327 /* Clear the interrupted flag of the thread so it can wait again */
4328 mono_thread_info_clear_self_interrupt ();
4331 if ((thread->state & ThreadState_AbortRequested) != 0) {
4332 UNLOCK_THREAD (thread);
4333 if (thread->abort_exc == NULL) {
4335 * This might be racy, but it has to be called outside the lock
4336 * since it calls managed code.
4338 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4340 return thread->abort_exc;
4342 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4343 /* calls UNLOCK_THREAD (thread) */
4344 self_suspend_internal ();
4347 else if ((thread->state & ThreadState_StopRequested) != 0) {
4348 /* FIXME: do this through the JIT? */
4350 UNLOCK_THREAD (thread);
4352 mono_thread_exit ();
4354 } else if (sys_thread->pending_exception) {
4357 exc = sys_thread->pending_exception;
4358 sys_thread->pending_exception = NULL;
4360 UNLOCK_THREAD (thread);
4362 } else if (thread->thread_interrupt_requested) {
4364 thread->thread_interrupt_requested = FALSE;
4365 UNLOCK_THREAD (thread);
4367 return(mono_get_exception_thread_interrupted ());
4370 UNLOCK_THREAD (thread);
4376 * mono_thread_request_interruption
4378 * A signal handler can call this method to request the interruption of a
4379 * thread. The result of the interruption will depend on the current state of
4380 * the thread. If the result is an exception that needs to be throw, it is
4381 * provided as return value.
4384 mono_thread_request_interruption (gboolean running_managed)
4386 MonoInternalThread *thread = mono_thread_internal_current ();
4388 /* The thread may already be stopping */
4393 if (thread->interrupt_on_stop &&
4394 thread->state & ThreadState_StopRequested &&
4395 thread->state & ThreadState_Background)
4399 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4401 InterlockedIncrement (&thread_interruption_requested);
4403 if (!running_managed || is_running_protected_wrapper ()) {
4404 /* Can't stop while in unmanaged code. Increase the global interruption
4405 request count. When exiting the unmanaged method the count will be
4406 checked and the thread will be interrupted. */
4408 /* this will awake the thread if it is in WaitForSingleObject
4410 /* Our implementation of this function ignores the func argument */
4412 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4414 mono_thread_info_self_interrupt ();
4419 return mono_thread_execute_interruption ();
4423 /*This function should be called by a thread after it has exited all of
4424 * its handle blocks at interruption time.*/
4426 mono_thread_resume_interruption (void)
4428 MonoInternalThread *thread = mono_thread_internal_current ();
4429 gboolean still_aborting;
4431 /* The thread may already be stopping */
4435 LOCK_THREAD (thread);
4436 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4437 UNLOCK_THREAD (thread);
4439 /*This can happen if the protected block called Thread::ResetAbort*/
4440 if (!still_aborting)
4443 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4445 InterlockedIncrement (&thread_interruption_requested);
4447 mono_thread_info_self_interrupt ();
4449 return mono_thread_execute_interruption ();
4452 gboolean mono_thread_interruption_requested ()
4454 if (thread_interruption_requested) {
4455 MonoInternalThread *thread = mono_thread_internal_current ();
4456 /* The thread may already be stopping */
4458 return (thread->interruption_requested);
4463 static MonoException*
4464 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4466 MonoInternalThread *thread = mono_thread_internal_current ();
4468 /* The thread may already be stopping */
4472 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4473 MonoException* exc = mono_thread_execute_interruption ();
4481 * Performs the interruption of the current thread, if one has been requested,
4482 * and the thread is not running a protected wrapper.
4483 * Return the exception which needs to be thrown, if any.
4486 mono_thread_interruption_checkpoint (void)
4488 return mono_thread_interruption_checkpoint_request (FALSE);
4492 * Performs the interruption of the current thread, if one has been requested.
4493 * Return the exception which needs to be thrown, if any.
4496 mono_thread_force_interruption_checkpoint_noraise (void)
4498 return mono_thread_interruption_checkpoint_request (TRUE);
4502 * mono_thread_get_and_clear_pending_exception:
4504 * Return any pending exceptions for the current thread and clear it as a side effect.
4507 mono_thread_get_and_clear_pending_exception (void)
4509 MonoInternalThread *thread = mono_thread_internal_current ();
4510 MonoThread *sys_thread = mono_thread_current ();
4512 /* The thread may already be stopping */
4516 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4517 return mono_thread_execute_interruption ();
4520 if (sys_thread->pending_exception) {
4521 MonoException *exc = sys_thread->pending_exception;
4523 sys_thread->pending_exception = NULL;
4531 * mono_set_pending_exception:
4533 * Set the pending exception of the current thread to EXC.
4534 * The exception will be thrown when execution returns to managed code.
4537 mono_set_pending_exception (MonoException *exc)
4539 MonoThread *thread = mono_thread_current ();
4541 /* The thread may already be stopping */
4545 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4547 mono_thread_request_interruption (FALSE);
4551 * mono_thread_interruption_request_flag:
4553 * Returns the address of a flag that will be non-zero if an interruption has
4554 * been requested for a thread. The thread to interrupt may not be the current
4555 * thread, so an additional call to mono_thread_interruption_requested() or
4556 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4559 gint32* mono_thread_interruption_request_flag ()
4561 return &thread_interruption_requested;
4565 mono_thread_init_apartment_state (void)
4568 MonoInternalThread* thread = mono_thread_internal_current ();
4570 /* Positive return value indicates success, either
4571 * S_OK if this is first CoInitialize call, or
4572 * S_FALSE if CoInitialize already called, but with same
4573 * threading model. A negative value indicates failure,
4574 * probably due to trying to change the threading model.
4576 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4577 ? COINIT_APARTMENTTHREADED
4578 : COINIT_MULTITHREADED) < 0) {
4579 thread->apartment_state = ThreadApartmentState_Unknown;
4585 mono_thread_cleanup_apartment_state (void)
4588 MonoInternalThread* thread = mono_thread_internal_current ();
4590 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4597 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4599 LOCK_THREAD (thread);
4600 thread->state |= state;
4601 UNLOCK_THREAD (thread);
4605 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4607 LOCK_THREAD (thread);
4608 thread->state &= ~state;
4609 UNLOCK_THREAD (thread);
4613 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4615 gboolean ret = FALSE;
4617 LOCK_THREAD (thread);
4619 if ((thread->state & test) != 0) {
4623 UNLOCK_THREAD (thread);
4628 static gboolean has_tls_get = FALSE;
4631 mono_runtime_set_has_tls_get (gboolean val)
4637 mono_runtime_has_tls_get (void)
4643 self_interrupt_thread (void *_unused)
4645 MonoThreadInfo *info = mono_thread_info_current ();
4646 MonoException *exc = mono_thread_execute_interruption ();
4647 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4648 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. */
4649 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4653 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4657 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4661 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4663 MonoJitInfo **dest = (MonoJitInfo **)data;
4669 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4671 MonoJitInfo *ji = NULL;
4674 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4679 MonoInternalThread *thread;
4680 gboolean install_async_abort;
4681 MonoThreadInfoInterruptToken *interrupt_token;
4684 static SuspendThreadResult
4685 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4687 AbortThreadData *data = (AbortThreadData *)ud;
4688 MonoInternalThread *thread = data->thread;
4689 MonoJitInfo *ji = NULL;
4690 gboolean protected_wrapper;
4691 gboolean running_managed;
4693 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4694 return MonoResumeThread;
4696 /*someone is already interrupting it*/
4697 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4698 return MonoResumeThread;
4700 InterlockedIncrement (&thread_interruption_requested);
4702 ji = mono_thread_info_get_last_managed (info);
4703 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4704 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4706 if (!protected_wrapper && running_managed) {
4707 /*We are in managed code*/
4708 /*Set the thread to call */
4709 if (data->install_async_abort)
4710 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4711 return MonoResumeThread;
4714 * This will cause waits to be broken.
4715 * It will also prevent the thread from entering a wait, so if the thread returns
4716 * from the wait before it receives the abort signal, it will just spin in the wait
4717 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4720 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4722 return MonoResumeThread;
4727 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4729 AbortThreadData data;
4731 g_assert (thread != mono_thread_internal_current ());
4733 data.thread = thread;
4734 data.install_async_abort = install_async_abort;
4735 data.interrupt_token = NULL;
4737 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4738 if (data.interrupt_token)
4739 mono_thread_info_finish_interrupt (data.interrupt_token);
4740 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4744 self_abort_internal (void)
4748 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4749 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4751 exc = mono_thread_request_interruption (TRUE);
4753 mono_raise_exception (exc);
4755 mono_thread_info_self_interrupt ();
4759 MonoInternalThread *thread;
4761 MonoThreadInfoInterruptToken *interrupt_token;
4762 } SuspendThreadData;
4764 static SuspendThreadResult
4765 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4767 SuspendThreadData *data = (SuspendThreadData *)ud;
4768 MonoInternalThread *thread = data->thread;
4769 MonoJitInfo *ji = NULL;
4770 gboolean protected_wrapper;
4771 gboolean running_managed;
4773 ji = mono_thread_info_get_last_managed (info);
4774 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4775 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4777 if (running_managed && !protected_wrapper) {
4778 thread->state &= ~ThreadState_SuspendRequested;
4779 thread->state |= ThreadState_Suspended;
4780 return KeepSuspended;
4782 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4783 InterlockedIncrement (&thread_interruption_requested);
4784 if (data->interrupt)
4785 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4787 return MonoResumeThread;
4791 /* LOCKING: called with @thread synch_cs held, and releases it */
4793 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4795 SuspendThreadData data;
4797 g_assert (thread != mono_thread_internal_current ());
4799 data.thread = thread;
4800 data.interrupt = interrupt;
4801 data.interrupt_token = NULL;
4803 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4804 if (data.interrupt_token)
4805 mono_thread_info_finish_interrupt (data.interrupt_token);
4807 UNLOCK_THREAD (thread);
4810 /* LOCKING: called with @thread synch_cs held, and releases it */
4812 self_suspend_internal (void)
4814 MonoInternalThread *thread;
4816 thread = mono_thread_internal_current ();
4818 mono_thread_info_begin_self_suspend ();
4819 thread->state &= ~ThreadState_SuspendRequested;
4820 thread->state |= ThreadState_Suspended;
4822 UNLOCK_THREAD (thread);
4824 mono_thread_info_end_self_suspend ();
4828 * mono_thread_is_foreign:
4829 * @thread: the thread to query
4831 * This function allows one to determine if a thread was created by the mono runtime and has
4832 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4834 * Returns: TRUE if @thread was not created by the runtime.
4837 mono_thread_is_foreign (MonoThread *thread)
4839 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4840 return info->runtime_thread == FALSE;
4844 * mono_add_joinable_thread:
4846 * Add TID to the list of joinable threads.
4847 * LOCKING: Acquires the threads lock.
4850 mono_threads_add_joinable_thread (gpointer tid)
4854 * We cannot detach from threads because it causes problems like
4855 * 2fd16f60/r114307. So we collect them and join them when
4856 * we have time (in he finalizer thread).
4858 joinable_threads_lock ();
4859 if (!joinable_threads)
4860 joinable_threads = g_hash_table_new (NULL, NULL);
4861 g_hash_table_insert (joinable_threads, tid, tid);
4862 joinable_thread_count ++;
4863 joinable_threads_unlock ();
4865 mono_gc_finalize_notify ();
4870 * mono_threads_join_threads:
4872 * Join all joinable threads. This is called from the finalizer thread.
4873 * LOCKING: Acquires the threads lock.
4876 mono_threads_join_threads (void)
4879 GHashTableIter iter;
4886 if (!joinable_thread_count)
4890 joinable_threads_lock ();
4892 if (g_hash_table_size (joinable_threads)) {
4893 g_hash_table_iter_init (&iter, joinable_threads);
4894 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4895 thread = (pthread_t)tid;
4896 g_hash_table_remove (joinable_threads, key);
4897 joinable_thread_count --;
4900 joinable_threads_unlock ();
4902 if (thread != pthread_self ())
4903 /* This shouldn't block */
4904 pthread_join (thread, NULL);
4915 * Wait for thread TID to exit.
4916 * LOCKING: Acquires the threads lock.
4919 mono_thread_join (gpointer tid)
4923 gboolean found = FALSE;
4925 joinable_threads_lock ();
4926 if (!joinable_threads)
4927 joinable_threads = g_hash_table_new (NULL, NULL);
4928 if (g_hash_table_lookup (joinable_threads, tid)) {
4929 g_hash_table_remove (joinable_threads, tid);
4930 joinable_thread_count --;
4933 joinable_threads_unlock ();
4936 thread = (pthread_t)tid;
4937 pthread_join (thread, NULL);
4942 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4944 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4945 mono_thread_interruption_checkpoint ();
4948 static inline gboolean
4949 is_appdomainunloaded_exception (MonoClass *klass)
4951 return klass == mono_class_get_appdomain_unloaded_exception_class ();
4954 static inline gboolean
4955 is_threadabort_exception (MonoClass *klass)
4957 return klass == mono_defaults.threadabortexception_class;
4961 mono_thread_internal_unhandled_exception (MonoObject* exc)
4963 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4964 MonoClass *klass = exc->vtable->klass;
4965 if (is_threadabort_exception (klass)) {
4966 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4967 } else if (!is_appdomainunloaded_exception (klass)) {
4968 mono_unhandled_exception (exc);
4969 if (mono_environment_exitcode_get () == 1)
4976 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4978 mono_threads_get_thread_dump (out_threads, out_stack_traces);