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 MONO_CHECK_NULL (location, NULL);
2033 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2034 mono_gc_wbarrier_generic_nostore (location);
2039 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2041 return InterlockedAdd (location, value);
2045 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2047 #if SIZEOF_VOID_P == 4
2048 if (G_UNLIKELY ((size_t)location & 0x7)) {
2050 mono_interlocked_lock ();
2053 mono_interlocked_unlock ();
2057 return InterlockedAdd64 (location, value);
2061 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2063 #if SIZEOF_VOID_P == 4
2064 if (G_UNLIKELY ((size_t)location & 0x7)) {
2066 mono_interlocked_lock ();
2068 mono_interlocked_unlock ();
2072 return InterlockedRead64 (location);
2076 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2078 mono_memory_barrier ();
2082 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2084 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2086 if (state & ThreadState_Background) {
2087 /* If the thread changes the background mode, the main thread has to
2088 * be notified, since it has to rebuild the list of threads to
2091 SetEvent (background_change_event);
2096 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2098 mono_thread_set_state (this_obj, (MonoThreadState)state);
2100 if (state & ThreadState_Background) {
2101 /* If the thread changes the background mode, the main thread has to
2102 * be notified, since it has to rebuild the list of threads to
2105 SetEvent (background_change_event);
2110 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2114 LOCK_THREAD (this_obj);
2116 state = this_obj->state;
2118 UNLOCK_THREAD (this_obj);
2123 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2125 MonoInternalThread *current;
2127 MonoInternalThread *thread = this_obj->internal_thread;
2129 LOCK_THREAD (thread);
2131 current = mono_thread_internal_current ();
2133 thread->thread_interrupt_requested = TRUE;
2134 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2136 UNLOCK_THREAD (thread);
2139 async_abort_internal (thread, FALSE);
2143 void mono_thread_current_check_pending_interrupt ()
2145 MonoInternalThread *thread = mono_thread_internal_current ();
2146 gboolean throw_ = FALSE;
2148 LOCK_THREAD (thread);
2150 if (thread->thread_interrupt_requested) {
2152 thread->thread_interrupt_requested = FALSE;
2155 UNLOCK_THREAD (thread);
2158 mono_raise_exception (mono_get_exception_thread_interrupted ());
2163 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2165 LOCK_THREAD (thread);
2167 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2168 (thread->state & ThreadState_StopRequested) != 0 ||
2169 (thread->state & ThreadState_Stopped) != 0)
2171 UNLOCK_THREAD (thread);
2175 if ((thread->state & ThreadState_Unstarted) != 0) {
2176 thread->state |= ThreadState_Aborted;
2177 UNLOCK_THREAD (thread);
2181 thread->state |= ThreadState_AbortRequested;
2182 if (thread->abort_state_handle)
2183 mono_gchandle_free (thread->abort_state_handle);
2185 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2186 g_assert (thread->abort_state_handle);
2188 thread->abort_state_handle = 0;
2190 thread->abort_exc = NULL;
2192 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));
2194 /* During shutdown, we can't wait for other threads */
2196 /* Make sure the thread is awake */
2197 mono_thread_resume (thread);
2199 UNLOCK_THREAD (thread);
2201 if (thread == mono_thread_internal_current ())
2202 self_abort_internal ();
2204 async_abort_internal (thread, TRUE);
2208 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2210 MonoInternalThread *thread = mono_thread_internal_current ();
2211 gboolean was_aborting;
2213 LOCK_THREAD (thread);
2214 was_aborting = thread->state & ThreadState_AbortRequested;
2215 thread->state &= ~ThreadState_AbortRequested;
2216 UNLOCK_THREAD (thread);
2218 if (!was_aborting) {
2219 const char *msg = "Unable to reset abort because no abort was requested";
2220 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2223 thread->abort_exc = NULL;
2224 if (thread->abort_state_handle) {
2225 mono_gchandle_free (thread->abort_state_handle);
2226 /* This is actually not necessary - the handle
2227 only counts if the exception is set */
2228 thread->abort_state_handle = 0;
2233 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2235 LOCK_THREAD (thread);
2237 thread->state &= ~ThreadState_AbortRequested;
2239 if (thread->abort_exc) {
2240 thread->abort_exc = NULL;
2241 if (thread->abort_state_handle) {
2242 mono_gchandle_free (thread->abort_state_handle);
2243 /* This is actually not necessary - the handle
2244 only counts if the exception is set */
2245 thread->abort_state_handle = 0;
2249 UNLOCK_THREAD (thread);
2253 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2255 MonoInternalThread *thread = this_obj->internal_thread;
2256 MonoObject *state, *deserialized = NULL, *exc;
2259 if (!thread->abort_state_handle)
2262 state = mono_gchandle_get_target (thread->abort_state_handle);
2265 domain = mono_domain_get ();
2266 if (mono_object_domain (state) == domain)
2269 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2271 if (!deserialized) {
2272 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2274 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2275 mono_set_pending_exception (invalid_op_exc);
2279 return deserialized;
2283 mono_thread_suspend (MonoInternalThread *thread)
2285 LOCK_THREAD (thread);
2287 if ((thread->state & ThreadState_Unstarted) != 0 ||
2288 (thread->state & ThreadState_Aborted) != 0 ||
2289 (thread->state & ThreadState_Stopped) != 0)
2291 UNLOCK_THREAD (thread);
2295 if ((thread->state & ThreadState_Suspended) != 0 ||
2296 (thread->state & ThreadState_SuspendRequested) != 0 ||
2297 (thread->state & ThreadState_StopRequested) != 0)
2299 UNLOCK_THREAD (thread);
2303 thread->state |= ThreadState_SuspendRequested;
2305 if (thread == mono_thread_internal_current ()) {
2306 /* calls UNLOCK_THREAD (thread) */
2307 self_suspend_internal ();
2309 /* calls UNLOCK_THREAD (thread) */
2310 async_suspend_internal (thread, FALSE);
2317 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2319 if (!mono_thread_suspend (this_obj->internal_thread)) {
2320 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2325 /* LOCKING: LOCK_THREAD(thread) must be held */
2327 mono_thread_resume (MonoInternalThread *thread)
2329 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2330 thread->state &= ~ThreadState_SuspendRequested;
2334 if ((thread->state & ThreadState_Suspended) == 0 ||
2335 (thread->state & ThreadState_Unstarted) != 0 ||
2336 (thread->state & ThreadState_Aborted) != 0 ||
2337 (thread->state & ThreadState_Stopped) != 0)
2342 UNLOCK_THREAD (thread);
2344 /* Awake the thread */
2345 if (!mono_thread_info_resume (thread_get_tid (thread)))
2348 LOCK_THREAD (thread);
2350 thread->state &= ~ThreadState_Suspended;
2356 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2358 if (!thread->internal_thread) {
2359 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2361 LOCK_THREAD (thread->internal_thread);
2362 if (!mono_thread_resume (thread->internal_thread))
2363 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2364 UNLOCK_THREAD (thread->internal_thread);
2369 mono_threads_is_critical_method (MonoMethod *method)
2371 switch (method->wrapper_type) {
2372 case MONO_WRAPPER_RUNTIME_INVOKE:
2373 case MONO_WRAPPER_XDOMAIN_INVOKE:
2374 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2381 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2386 if (mono_threads_is_critical_method (m)) {
2387 *((gboolean*)data) = TRUE;
2394 is_running_protected_wrapper (void)
2396 gboolean found = FALSE;
2397 mono_stack_walk (find_wrapper, &found);
2401 void mono_thread_internal_stop (MonoInternalThread *thread)
2403 LOCK_THREAD (thread);
2405 if ((thread->state & ThreadState_StopRequested) != 0 ||
2406 (thread->state & ThreadState_Stopped) != 0)
2408 UNLOCK_THREAD (thread);
2412 /* Make sure the thread is awake */
2413 mono_thread_resume (thread);
2415 thread->state |= ThreadState_StopRequested;
2416 thread->state &= ~ThreadState_AbortRequested;
2418 UNLOCK_THREAD (thread);
2420 if (thread == mono_thread_internal_current ())
2421 self_abort_internal ();
2423 async_abort_internal (thread, TRUE);
2426 void mono_thread_stop (MonoThread *thread)
2428 mono_thread_internal_stop (thread->internal_thread);
2432 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2434 gint8 tmp = *(volatile gint8 *)ptr;
2435 mono_memory_barrier ();
2440 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2442 gint16 tmp = *(volatile gint16 *)ptr;
2443 mono_memory_barrier ();
2448 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2450 gint32 tmp = *(volatile gint32 *)ptr;
2451 mono_memory_barrier ();
2456 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2458 gint64 tmp = *(volatile gint64 *)ptr;
2459 mono_memory_barrier ();
2464 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2466 volatile void *tmp = *(volatile void **)ptr;
2467 mono_memory_barrier ();
2468 return (void *) tmp;
2472 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2474 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2475 mono_memory_barrier ();
2476 return (MonoObject *) tmp;
2480 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2482 double tmp = *(volatile double *)ptr;
2483 mono_memory_barrier ();
2488 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2490 float tmp = *(volatile float *)ptr;
2491 mono_memory_barrier ();
2496 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2498 return InterlockedRead8 ((volatile gint8 *)ptr);
2502 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2504 return InterlockedRead16 ((volatile gint16 *)ptr);
2508 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2510 return InterlockedRead ((volatile gint32 *)ptr);
2514 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2516 #if SIZEOF_VOID_P == 4
2517 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2519 mono_interlocked_lock ();
2520 val = *(gint64*)ptr;
2521 mono_interlocked_unlock ();
2525 return InterlockedRead64 ((volatile gint64 *)ptr);
2529 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2531 return InterlockedReadPointer ((volatile gpointer *)ptr);
2535 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2539 #if SIZEOF_VOID_P == 4
2540 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2542 mono_interlocked_lock ();
2543 val = *(double*)ptr;
2544 mono_interlocked_unlock ();
2549 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2555 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2559 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2565 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2567 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2571 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2573 mono_memory_barrier ();
2574 *(volatile gint8 *)ptr = value;
2578 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2580 mono_memory_barrier ();
2581 *(volatile gint16 *)ptr = value;
2585 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2587 mono_memory_barrier ();
2588 *(volatile gint32 *)ptr = value;
2592 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2594 mono_memory_barrier ();
2595 *(volatile gint64 *)ptr = value;
2599 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2601 mono_memory_barrier ();
2602 *(volatile void **)ptr = value;
2606 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2608 mono_memory_barrier ();
2609 mono_gc_wbarrier_generic_store (ptr, value);
2613 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2615 mono_memory_barrier ();
2616 *(volatile double *)ptr = value;
2620 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2622 mono_memory_barrier ();
2623 *(volatile float *)ptr = value;
2627 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2629 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2633 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2635 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2639 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2641 InterlockedWrite ((volatile gint32 *)ptr, value);
2645 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2647 #if SIZEOF_VOID_P == 4
2648 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2649 mono_interlocked_lock ();
2650 *(gint64*)ptr = value;
2651 mono_interlocked_unlock ();
2656 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2660 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2662 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2666 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2670 #if SIZEOF_VOID_P == 4
2671 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2672 mono_interlocked_lock ();
2673 *(double*)ptr = value;
2674 mono_interlocked_unlock ();
2681 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2685 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2691 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2695 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2697 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2701 free_context (void *user_data)
2703 ContextStaticData *data = user_data;
2705 mono_threads_lock ();
2708 * There is no guarantee that, by the point this reference queue callback
2709 * has been invoked, the GC handle associated with the object will fail to
2710 * resolve as one might expect. So if we don't free and remove the GC
2711 * handle here, free_context_static_data_helper () could end up resolving
2712 * a GC handle to an actually-dead context which would contain a pointer
2713 * to an already-freed static data segment, resulting in a crash when
2716 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2718 mono_threads_unlock ();
2720 mono_gchandle_free (data->gc_handle);
2721 mono_free_static_data (data->static_data);
2726 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2728 mono_threads_lock ();
2730 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2733 contexts = g_hash_table_new (NULL, NULL);
2736 context_queue = mono_gc_reference_queue_new (free_context);
2738 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2739 g_hash_table_insert (contexts, gch, gch);
2742 * We use this intermediate structure to contain a duplicate pointer to
2743 * the static data because we can't rely on being able to resolve the GC
2744 * handle in the reference queue callback.
2746 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2747 data->gc_handle = GPOINTER_TO_UINT (gch);
2750 context_adjust_static_data (ctx);
2751 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2753 mono_threads_unlock ();
2755 mono_profiler_context_loaded (ctx);
2759 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2762 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2763 * cleanup in exceptional circumstances, we don't actually do any
2764 * cleanup work here. We instead do this via a reference queue.
2767 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2769 mono_profiler_context_unloaded (ctx);
2773 mono_thread_init_tls (void)
2775 MONO_FAST_TLS_INIT (tls_current_object);
2776 mono_native_tls_alloc (¤t_object_key, NULL);
2779 void mono_thread_init (MonoThreadStartCB start_cb,
2780 MonoThreadAttachCB attach_cb)
2782 mono_coop_mutex_init_recursive (&threads_mutex);
2784 mono_os_mutex_init_recursive(&interlocked_mutex);
2785 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2787 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2788 g_assert(background_change_event != NULL);
2790 mono_init_static_data_info (&thread_static_info);
2791 mono_init_static_data_info (&context_static_info);
2793 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2795 mono_thread_start_cb = start_cb;
2796 mono_thread_attach_cb = attach_cb;
2798 /* Get a pseudo handle to the current process. This is just a
2799 * kludge so that wapi can build a process handle if needed.
2800 * As a pseudo handle is returned, we don't need to clean
2803 GetCurrentProcess ();
2806 void mono_thread_cleanup (void)
2808 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2809 MonoThreadInfo *info;
2811 /* The main thread must abandon any held mutexes (particularly
2812 * important for named mutexes as they are shared across
2813 * processes, see bug 74680.) This will happen when the
2814 * thread exits, but if it's not running in a subthread it
2815 * won't exit in time.
2817 info = mono_thread_info_current ();
2818 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2822 /* This stuff needs more testing, it seems one of these
2823 * critical sections can be locked when mono_thread_cleanup is
2826 mono_coop_mutex_destroy (&threads_mutex);
2827 mono_os_mutex_destroy (&interlocked_mutex);
2828 mono_os_mutex_destroy (&delayed_free_table_mutex);
2829 mono_os_mutex_destroy (&small_id_mutex);
2830 CloseHandle (background_change_event);
2833 mono_native_tls_free (current_object_key);
2837 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2839 mono_thread_cleanup_fn = func;
2843 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2845 thread->internal_thread->manage_callback = func;
2849 static void print_tids (gpointer key, gpointer value, gpointer user)
2851 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2852 * sizeof(uint) and a cast to uint would overflow
2854 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2855 * print this as a pointer.
2857 g_message ("Waiting for: %p", key);
2862 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2863 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2867 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2871 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2873 MONO_PREPARE_BLOCKING;
2874 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2875 MONO_FINISH_BLOCKING;
2877 if(ret==WAIT_FAILED) {
2878 /* See the comment in build_wait_tids() */
2879 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2883 for(i=0; i<wait->num; i++)
2884 CloseHandle (wait->handles[i]);
2886 if (ret == WAIT_TIMEOUT)
2889 for(i=0; i<wait->num; i++) {
2890 gsize tid = wait->threads[i]->tid;
2893 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2894 * it can still run io-layer etc. code. So wait for it to really exit.
2895 * FIXME: This won't join threads which are not in the joinable_hash yet.
2897 mono_thread_join ((gpointer)tid);
2899 mono_threads_lock ();
2900 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2901 /* This thread must have been killed, because
2902 * it hasn't cleaned itself up. (It's just
2903 * possible that the thread exited before the
2904 * parent thread had a chance to store the
2905 * handle, and now there is another pointer to
2906 * the already-exited thread stored. In this
2907 * case, we'll just get two
2908 * mono_profiler_thread_end() calls for the
2912 mono_threads_unlock ();
2913 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2914 thread_cleanup (wait->threads[i]);
2916 mono_threads_unlock ();
2921 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2923 guint32 i, ret, count;
2925 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2927 /* Add the thread state change event, so it wakes up if a thread changes
2928 * to background mode.
2931 if (count < MAXIMUM_WAIT_OBJECTS) {
2932 wait->handles [count] = background_change_event;
2936 MONO_PREPARE_BLOCKING;
2937 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2938 MONO_FINISH_BLOCKING;
2940 if(ret==WAIT_FAILED) {
2941 /* See the comment in build_wait_tids() */
2942 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2946 for(i=0; i<wait->num; i++)
2947 CloseHandle (wait->handles[i]);
2949 if (ret == WAIT_TIMEOUT)
2952 if (ret < wait->num) {
2953 gsize tid = wait->threads[ret]->tid;
2954 mono_threads_lock ();
2955 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2956 /* See comment in wait_for_tids about thread cleanup */
2957 mono_threads_unlock ();
2958 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2959 thread_cleanup (wait->threads [ret]);
2961 mono_threads_unlock ();
2965 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2967 struct wait_data *wait=(struct wait_data *)user;
2969 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2971 MonoInternalThread *thread=(MonoInternalThread *)value;
2973 /* Ignore background threads, we abort them later */
2974 /* Do not lock here since it is not needed and the caller holds threads_lock */
2975 if (thread->state & ThreadState_Background) {
2976 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2977 return; /* just leave, ignore */
2980 if (mono_gc_is_finalizer_internal_thread (thread)) {
2981 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2985 if (thread == mono_thread_internal_current ()) {
2986 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2990 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2991 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2995 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2996 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3000 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3001 if (handle == NULL) {
3002 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3006 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3007 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3008 wait->handles[wait->num]=handle;
3009 wait->threads[wait->num]=thread;
3012 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3014 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3019 /* Just ignore the rest, we can't do anything with
3026 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3028 struct wait_data *wait=(struct wait_data *)user;
3029 MonoNativeThreadId self = mono_native_thread_id_get ();
3030 MonoInternalThread *thread = (MonoInternalThread *)value;
3033 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3036 /* The finalizer thread is not a background thread */
3037 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3038 && (thread->state & ThreadState_Background) != 0
3039 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3041 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3045 /* printf ("A: %d\n", wait->num); */
3046 wait->handles[wait->num]=thread->handle;
3047 wait->threads[wait->num]=thread;
3050 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3051 mono_thread_internal_stop (thread);
3055 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3056 && !mono_gc_is_finalizer_internal_thread (thread);
3060 * mono_threads_set_shutting_down:
3062 * Is called by a thread that wants to shut down Mono. If the runtime is already
3063 * shutting down, the calling thread is suspended/stopped, and this function never
3067 mono_threads_set_shutting_down (void)
3069 MonoInternalThread *current_thread = mono_thread_internal_current ();
3071 mono_threads_lock ();
3073 if (shutting_down) {
3074 mono_threads_unlock ();
3076 /* Make sure we're properly suspended/stopped */
3078 LOCK_THREAD (current_thread);
3080 if ((current_thread->state & ThreadState_SuspendRequested) ||
3081 (current_thread->state & ThreadState_AbortRequested) ||
3082 (current_thread->state & ThreadState_StopRequested)) {
3083 UNLOCK_THREAD (current_thread);
3084 mono_thread_execute_interruption ();
3086 current_thread->state |= ThreadState_Stopped;
3087 UNLOCK_THREAD (current_thread);
3090 /*since we're killing the thread, unset the current domain.*/
3091 mono_domain_unset ();
3093 /* Wake up other threads potentially waiting for us */
3094 mono_thread_info_exit ();
3096 shutting_down = TRUE;
3098 /* Not really a background state change, but this will
3099 * interrupt the main thread if it is waiting for all
3100 * the other threads.
3102 SetEvent (background_change_event);
3104 mono_threads_unlock ();
3108 void mono_thread_manage (void)
3110 struct wait_data wait_data;
3111 struct wait_data *wait = &wait_data;
3113 memset (wait, 0, sizeof (struct wait_data));
3114 /* join each thread that's still running */
3115 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3117 mono_threads_lock ();
3119 THREAD_DEBUG (g_message("%s: No threads", __func__));
3120 mono_threads_unlock ();
3123 mono_threads_unlock ();
3126 mono_threads_lock ();
3127 if (shutting_down) {
3128 /* somebody else is shutting down */
3129 mono_threads_unlock ();
3132 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3133 mono_g_hash_table_foreach (threads, print_tids, NULL));
3135 ResetEvent (background_change_event);
3137 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3138 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3139 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3140 mono_threads_unlock ();
3142 /* Something to wait for */
3143 wait_for_tids_or_state_change (wait, INFINITE);
3145 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3146 } while(wait->num>0);
3148 /* Mono is shutting down, so just wait for the end */
3149 if (!mono_runtime_try_shutdown ()) {
3150 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3151 mono_thread_suspend (mono_thread_internal_current ());
3152 mono_thread_execute_interruption ();
3156 * Remove everything but the finalizer thread and self.
3157 * Also abort all the background threads
3160 mono_threads_lock ();
3163 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3164 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3165 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3167 mono_threads_unlock ();
3169 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3171 /* Something to wait for */
3172 wait_for_tids (wait, INFINITE);
3174 } while (wait->num > 0);
3177 * give the subthreads a chance to really quit (this is mainly needed
3178 * to get correct user and system times from getrusage/wait/time(1)).
3179 * This could be removed if we avoid pthread_detach() and use pthread_join().
3181 mono_thread_info_yield ();
3185 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3187 MonoInternalThread *thread = (MonoInternalThread*)value;
3188 struct wait_data *wait = (struct wait_data*)user_data;
3192 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3194 * This needs no locking.
3196 if ((thread->state & ThreadState_Suspended) != 0 ||
3197 (thread->state & ThreadState_Stopped) != 0)
3200 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3201 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3205 wait->handles [wait->num] = handle;
3206 wait->threads [wait->num] = thread;
3212 * mono_thread_suspend_all_other_threads:
3214 * Suspend all managed threads except the finalizer thread and this thread. It is
3215 * not possible to resume them later.
3217 void mono_thread_suspend_all_other_threads (void)
3219 struct wait_data wait_data;
3220 struct wait_data *wait = &wait_data;
3222 MonoNativeThreadId self = mono_native_thread_id_get ();
3223 guint32 eventidx = 0;
3224 gboolean starting, finished;
3226 memset (wait, 0, sizeof (struct wait_data));
3228 * The other threads could be in an arbitrary state at this point, i.e.
3229 * they could be starting up, shutting down etc. This means that there could be
3230 * threads which are not even in the threads hash table yet.
3234 * First we set a barrier which will be checked by all threads before they
3235 * are added to the threads hash table, and they will exit if the flag is set.
3236 * This ensures that no threads could be added to the hash later.
3237 * We will use shutting_down as the barrier for now.
3239 g_assert (shutting_down);
3242 * We make multiple calls to WaitForMultipleObjects since:
3243 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3244 * - some threads could exit without becoming suspended
3249 * Make a copy of the hashtable since we can't do anything with
3250 * threads while threads_mutex is held.
3253 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3254 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3255 mono_threads_lock ();
3256 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3257 mono_threads_unlock ();
3260 /* Get the suspended events that we'll be waiting for */
3261 for (i = 0; i < wait->num; ++i) {
3262 MonoInternalThread *thread = wait->threads [i];
3264 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3265 || mono_gc_is_finalizer_internal_thread (thread)
3266 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3268 //CloseHandle (wait->handles [i]);
3269 wait->threads [i] = NULL; /* ignore this thread in next loop */
3273 LOCK_THREAD (thread);
3275 if ((thread->state & ThreadState_Suspended) != 0 ||
3276 (thread->state & ThreadState_StopRequested) != 0 ||
3277 (thread->state & ThreadState_Stopped) != 0) {
3278 UNLOCK_THREAD (thread);
3279 CloseHandle (wait->handles [i]);
3280 wait->threads [i] = NULL; /* ignore this thread in next loop */
3286 /* Convert abort requests into suspend requests */
3287 if ((thread->state & ThreadState_AbortRequested) != 0)
3288 thread->state &= ~ThreadState_AbortRequested;
3290 thread->state |= ThreadState_SuspendRequested;
3292 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3293 async_suspend_internal (thread, TRUE);
3295 if (eventidx <= 0) {
3297 * If there are threads which are starting up, we wait until they
3298 * are suspended when they try to register in the threads hash.
3299 * This is guaranteed to finish, since the threads which can create new
3300 * threads get suspended after a while.
3301 * FIXME: The finalizer thread can still create new threads.
3303 mono_threads_lock ();
3304 if (threads_starting_up)
3305 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3308 mono_threads_unlock ();
3310 mono_thread_info_sleep (100, NULL);
3318 MonoInternalThread *thread;
3319 MonoStackFrameInfo *frames;
3320 int nframes, max_frames;
3321 int nthreads, max_threads;
3322 MonoInternalThread **threads;
3323 } ThreadDumpUserData;
3325 static gboolean thread_dump_requested;
3327 /* This needs to be async safe */
3329 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3331 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3333 if (ud->nframes < ud->max_frames) {
3334 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3341 /* This needs to be async safe */
3342 static SuspendThreadResult
3343 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3345 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3346 MonoInternalThread *thread = user_data->thread;
3349 /* This no longer works with remote unwinding */
3351 wapi_desc = wapi_current_thread_desc ();
3352 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3357 if (thread == mono_thread_internal_current ())
3358 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3360 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3362 return MonoResumeThread;
3366 int nthreads, max_threads;
3367 MonoInternalThread **threads;
3368 } CollectThreadsUserData;
3371 collect_thread (gpointer key, gpointer value, gpointer user)
3373 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3374 MonoInternalThread *thread = (MonoInternalThread *)value;
3376 if (ud->nthreads < ud->max_threads)
3377 ud->threads [ud->nthreads ++] = thread;
3381 * Collect running threads into the THREADS array.
3382 * THREADS should be an array allocated on the stack.
3385 collect_threads (MonoInternalThread **thread_array, int max_threads)
3387 CollectThreadsUserData ud;
3389 memset (&ud, 0, sizeof (ud));
3390 /* This array contains refs, but its on the stack, so its ok */
3391 ud.threads = thread_array;
3392 ud.max_threads = max_threads;
3394 mono_threads_lock ();
3395 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3396 mono_threads_unlock ();
3402 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3404 GString* text = g_string_new (0);
3406 GError *error = NULL;
3409 ud->thread = thread;
3412 /* Collect frames for the thread */
3413 if (thread == mono_thread_internal_current ()) {
3414 get_thread_dump (mono_thread_info_current (), ud);
3416 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3420 * Do all the non async-safe work outside of get_thread_dump.
3423 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3425 g_string_append_printf (text, "\n\"%s\"", name);
3428 else if (thread->threadpool_thread) {
3429 g_string_append (text, "\n\"<threadpool thread>\"");
3431 g_string_append (text, "\n\"<unnamed thread>\"");
3434 for (i = 0; i < ud->nframes; ++i) {
3435 MonoStackFrameInfo *frame = &ud->frames [i];
3436 MonoMethod *method = NULL;
3438 if (frame->type == FRAME_TYPE_MANAGED)
3439 method = mono_jit_info_get_method (frame->ji);
3442 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3443 g_string_append_printf (text, " %s\n", location);
3446 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3450 fprintf (stdout, "%s", text->str);
3452 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3453 OutputDebugStringA(text->str);
3456 g_string_free (text, TRUE);
3461 mono_threads_perform_thread_dump (void)
3463 ThreadDumpUserData ud;
3464 MonoInternalThread *thread_array [128];
3465 int tindex, nthreads;
3467 if (!thread_dump_requested)
3470 printf ("Full thread dump:\n");
3472 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3473 nthreads = collect_threads (thread_array, 128);
3475 memset (&ud, 0, sizeof (ud));
3476 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3477 ud.max_frames = 256;
3479 for (tindex = 0; tindex < nthreads; ++tindex)
3480 dump_thread (thread_array [tindex], &ud);
3484 thread_dump_requested = FALSE;
3487 /* Obtain the thread dump of all threads */
3489 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3493 ThreadDumpUserData ud;
3494 MonoInternalThread *thread_array [128];
3495 MonoDomain *domain = mono_domain_get ();
3496 MonoDebugSourceLocation *location;
3497 int tindex, nthreads;
3499 mono_error_init (&error);
3501 *out_threads = NULL;
3502 *out_stack_frames = NULL;
3504 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3505 nthreads = collect_threads (thread_array, 128);
3507 memset (&ud, 0, sizeof (ud));
3508 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3509 ud.max_frames = 256;
3511 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3512 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3514 for (tindex = 0; tindex < nthreads; ++tindex) {
3515 MonoInternalThread *thread = thread_array [tindex];
3516 MonoArray *thread_frames;
3522 /* Collect frames for the thread */
3523 if (thread == mono_thread_internal_current ()) {
3524 get_thread_dump (mono_thread_info_current (), &ud);
3526 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3529 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3531 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3532 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3534 for (i = 0; i < ud.nframes; ++i) {
3535 MonoStackFrameInfo *frame = &ud.frames [i];
3536 MonoMethod *method = NULL;
3537 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3538 if (!mono_error_ok (&error))
3541 sf->native_offset = frame->native_offset;
3543 if (frame->type == FRAME_TYPE_MANAGED)
3544 method = mono_jit_info_get_method (frame->ji);
3547 sf->method_address = (gsize) frame->ji->code_start;
3549 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3550 mono_error_raise_exception (&error); /* FIXME don't raise here */
3551 MONO_OBJECT_SETREF (sf, method, rm);
3553 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3555 sf->il_offset = location->il_offset;
3557 if (location && location->source_file) {
3558 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3559 sf->line = location->row;
3560 sf->column = location->column;
3562 mono_debug_free_source_location (location);
3567 mono_array_setref (thread_frames, i, sf);
3573 mono_error_raise_exception (&error); /* FIXME don't raise here */
3577 * mono_threads_request_thread_dump:
3579 * Ask all threads except the current to print their stacktrace to stdout.
3582 mono_threads_request_thread_dump (void)
3584 /*The new thread dump code runs out of the finalizer thread. */
3585 thread_dump_requested = TRUE;
3586 mono_gc_finalize_notify ();
3591 gint allocated; /* +1 so that refs [allocated] == NULL */
3595 typedef struct ref_stack RefStack;
3598 ref_stack_new (gint initial_size)
3602 initial_size = MAX (initial_size, 16) + 1;
3603 rs = g_new0 (RefStack, 1);
3604 rs->refs = g_new0 (gpointer, initial_size);
3605 rs->allocated = initial_size;
3610 ref_stack_destroy (gpointer ptr)
3612 RefStack *rs = (RefStack *)ptr;
3621 ref_stack_push (RefStack *rs, gpointer ptr)
3623 g_assert (rs != NULL);
3625 if (rs->bottom >= rs->allocated) {
3626 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3627 rs->allocated <<= 1;
3628 rs->refs [rs->allocated] = NULL;
3630 rs->refs [rs->bottom++] = ptr;
3634 ref_stack_pop (RefStack *rs)
3636 if (rs == NULL || rs->bottom == 0)
3640 rs->refs [rs->bottom] = NULL;
3644 ref_stack_find (RefStack *rs, gpointer ptr)
3651 for (refs = rs->refs; refs && *refs; refs++) {
3659 * mono_thread_push_appdomain_ref:
3661 * Register that the current thread may have references to objects in domain
3662 * @domain on its stack. Each call to this function should be paired with a
3663 * call to pop_appdomain_ref.
3666 mono_thread_push_appdomain_ref (MonoDomain *domain)
3668 MonoInternalThread *thread = mono_thread_internal_current ();
3671 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3672 SPIN_LOCK (thread->lock_thread_id);
3673 if (thread->appdomain_refs == NULL)
3674 thread->appdomain_refs = ref_stack_new (16);
3675 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3676 SPIN_UNLOCK (thread->lock_thread_id);
3681 mono_thread_pop_appdomain_ref (void)
3683 MonoInternalThread *thread = mono_thread_internal_current ();
3686 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3687 SPIN_LOCK (thread->lock_thread_id);
3688 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3689 SPIN_UNLOCK (thread->lock_thread_id);
3694 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3697 SPIN_LOCK (thread->lock_thread_id);
3698 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3699 SPIN_UNLOCK (thread->lock_thread_id);
3704 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3706 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3709 typedef struct abort_appdomain_data {
3710 struct wait_data wait;
3712 } abort_appdomain_data;
3715 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3717 MonoInternalThread *thread = (MonoInternalThread*)value;
3718 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3719 MonoDomain *domain = data->domain;
3721 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3722 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3724 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3725 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3728 data->wait.handles [data->wait.num] = handle;
3729 data->wait.threads [data->wait.num] = thread;
3732 /* Just ignore the rest, we can't do anything with
3740 * mono_threads_abort_appdomain_threads:
3742 * Abort threads which has references to the given appdomain.
3745 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3747 #ifdef __native_client__
3751 abort_appdomain_data user_data;
3753 int orig_timeout = timeout;
3756 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3758 start_time = mono_msec_ticks ();
3760 mono_threads_lock ();
3762 user_data.domain = domain;
3763 user_data.wait.num = 0;
3764 /* This shouldn't take any locks */
3765 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3766 mono_threads_unlock ();
3768 if (user_data.wait.num > 0) {
3769 /* Abort the threads outside the threads lock */
3770 for (i = 0; i < user_data.wait.num; ++i)
3771 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3774 * We should wait for the threads either to abort, or to leave the
3775 * domain. We can't do the latter, so we wait with a timeout.
3777 wait_for_tids (&user_data.wait, 100);
3780 /* Update remaining time */
3781 timeout -= mono_msec_ticks () - start_time;
3782 start_time = mono_msec_ticks ();
3784 if (orig_timeout != -1 && timeout < 0)
3787 while (user_data.wait.num > 0);
3789 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3795 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3797 MonoInternalThread *thread = (MonoInternalThread*)value;
3798 MonoDomain *domain = (MonoDomain*)user_data;
3801 /* No locking needed here */
3802 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3804 if (thread->cached_culture_info) {
3805 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3806 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3807 if (obj && obj->vtable->domain == domain)
3808 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3814 * mono_threads_clear_cached_culture:
3816 * Clear the cached_current_culture from all threads if it is in the
3820 mono_threads_clear_cached_culture (MonoDomain *domain)
3822 mono_threads_lock ();
3823 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3824 mono_threads_unlock ();
3828 * mono_thread_get_undeniable_exception:
3830 * Return an exception which needs to be raised when leaving a catch clause.
3831 * This is used for undeniable exception propagation.
3834 mono_thread_get_undeniable_exception (void)
3836 MonoInternalThread *thread = mono_thread_internal_current ();
3838 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3840 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3841 * exception if the thread no longer references a dying appdomain.
3843 thread->abort_exc->trace_ips = NULL;
3844 thread->abort_exc->stack_trace = NULL;
3845 return thread->abort_exc;
3851 #if MONO_SMALL_CONFIG
3852 #define NUM_STATIC_DATA_IDX 4
3853 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3857 #define NUM_STATIC_DATA_IDX 8
3858 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3859 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3863 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3864 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3867 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3869 gpointer *static_data = (gpointer *)addr;
3871 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3872 void **ptr = (void **)static_data [i];
3877 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3878 void **p = ptr + idx;
3881 mark_func ((MonoObject**)p, gc_data);
3887 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3889 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3893 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3895 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3899 * mono_alloc_static_data
3901 * Allocate memory blocks for storing threads or context static data
3904 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3906 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3909 gpointer* static_data = *static_data_ptr;
3911 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3912 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3914 if (mono_gc_user_markers_supported ()) {
3915 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3916 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3918 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3919 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3922 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3923 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3924 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3925 *static_data_ptr = static_data;
3926 static_data [0] = static_data;
3929 for (i = 1; i <= idx; ++i) {
3930 if (static_data [i])
3933 if (mono_gc_user_markers_supported ())
3934 static_data [i] = g_malloc0 (static_data_size [i]);
3936 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3937 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3938 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3943 mono_free_static_data (gpointer* static_data)
3946 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3947 gpointer p = static_data [i];
3951 * At this point, the static data pointer array is still registered with the
3952 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3953 * data. Freeing the individual arrays without first nulling their slots
3954 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3955 * such an already freed array. See bug #13813.
3957 static_data [i] = NULL;
3958 mono_memory_write_barrier ();
3959 if (mono_gc_user_markers_supported ())
3962 mono_gc_free_fixed (p);
3964 mono_gc_free_fixed (static_data);
3968 * mono_init_static_data_info
3970 * Initializes static data counters
3972 static void mono_init_static_data_info (StaticDataInfo *static_data)
3974 static_data->idx = 0;
3975 static_data->offset = 0;
3976 static_data->freelist = NULL;
3980 * mono_alloc_static_data_slot
3982 * Generates an offset for static data. static_data contains the counters
3983 * used to generate it.
3986 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3988 if (!static_data->idx && !static_data->offset) {
3990 * we use the first chunk of the first allocation also as
3991 * an array for the rest of the data
3993 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3995 static_data->offset += align - 1;
3996 static_data->offset &= ~(align - 1);
3997 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3998 static_data->idx ++;
3999 g_assert (size <= static_data_size [static_data->idx]);
4000 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4001 static_data->offset = 0;
4003 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4004 static_data->offset += size;
4009 * ensure thread static fields already allocated are valid for thread
4010 * This function is called when a thread is created or on thread attach.
4013 thread_adjust_static_data (MonoInternalThread *thread)
4015 mono_threads_lock ();
4016 if (thread_static_info.offset || thread_static_info.idx > 0) {
4017 /* get the current allocated size */
4018 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4019 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4021 mono_threads_unlock ();
4025 * LOCKING: requires that threads_mutex is held
4028 context_adjust_static_data (MonoAppContext *ctx)
4030 if (context_static_info.offset || context_static_info.idx > 0) {
4031 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4032 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4033 ctx->data->static_data = ctx->static_data;
4038 * LOCKING: requires that threads_mutex is held
4041 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4043 MonoInternalThread *thread = (MonoInternalThread *)value;
4044 guint32 offset = GPOINTER_TO_UINT (user);
4046 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4050 * LOCKING: requires that threads_mutex is held
4053 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4055 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4060 guint32 offset = GPOINTER_TO_UINT (user);
4061 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4062 ctx->data->static_data = ctx->static_data;
4065 static StaticDataFreeList*
4066 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4068 StaticDataFreeList* prev = NULL;
4069 StaticDataFreeList* tmp = static_data->freelist;
4071 if (tmp->size == size) {
4073 prev->next = tmp->next;
4075 static_data->freelist = tmp->next;
4084 #if SIZEOF_VOID_P == 4
4091 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4093 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4095 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4096 MonoBitSet *rb = sets [idx];
4097 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4098 offset /= sizeof (uintptr_t);
4099 /* offset is now the bitmap offset */
4100 for (int i = 0; i < numbits; ++i) {
4101 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4102 mono_bitset_set_fast (rb, offset + i);
4107 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4109 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4110 MonoBitSet *rb = sets [idx];
4111 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4112 offset /= sizeof (uintptr_t);
4113 /* offset is now the bitmap offset */
4114 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4115 mono_bitset_clear_fast (rb, offset + i);
4119 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4121 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4123 StaticDataInfo *info;
4126 if (static_type == SPECIAL_STATIC_THREAD) {
4127 info = &thread_static_info;
4128 sets = thread_reference_bitmaps;
4130 info = &context_static_info;
4131 sets = context_reference_bitmaps;
4134 mono_threads_lock ();
4136 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4140 offset = item->offset;
4143 offset = mono_alloc_static_data_slot (info, size, align);
4146 update_reference_bitmap (sets, offset, bitmap, numbits);
4148 if (static_type == SPECIAL_STATIC_THREAD) {
4149 /* This can be called during startup */
4150 if (threads != NULL)
4151 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4153 if (contexts != NULL)
4154 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4156 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4159 mono_threads_unlock ();
4165 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4167 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4169 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4170 return get_thread_static_data (thread, offset);
4172 return get_context_static_data (thread->current_appcontext, offset);
4177 mono_get_special_static_data (guint32 offset)
4179 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4188 * LOCKING: requires that threads_mutex is held
4191 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4193 MonoInternalThread *thread = (MonoInternalThread *)value;
4194 OffsetSize *data = (OffsetSize *)user;
4195 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4196 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4199 if (!thread->static_data || !thread->static_data [idx])
4201 ptr = ((char*) thread->static_data [idx]) + off;
4202 mono_gc_bzero_atomic (ptr, data->size);
4206 * LOCKING: requires that threads_mutex is held
4209 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4211 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4216 OffsetSize *data = (OffsetSize *)user;
4217 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4218 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4221 if (!ctx->static_data || !ctx->static_data [idx])
4224 ptr = ((char*) ctx->static_data [idx]) + off;
4225 mono_gc_bzero_atomic (ptr, data->size);
4229 do_free_special_slot (guint32 offset, guint32 size)
4231 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4233 StaticDataInfo *info;
4235 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4236 info = &thread_static_info;
4237 sets = thread_reference_bitmaps;
4239 info = &context_static_info;
4240 sets = context_reference_bitmaps;
4243 guint32 data_offset = offset;
4244 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4245 OffsetSize data = { data_offset, size };
4247 clear_reference_bitmap (sets, data.offset, data.size);
4249 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4250 if (threads != NULL)
4251 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4253 if (contexts != NULL)
4254 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4257 if (!mono_runtime_is_shutting_down ()) {
4258 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4260 item->offset = offset;
4263 item->next = info->freelist;
4264 info->freelist = item;
4269 do_free_special (gpointer key, gpointer value, gpointer data)
4271 MonoClassField *field = (MonoClassField *)key;
4272 guint32 offset = GPOINTER_TO_UINT (value);
4275 size = mono_type_size (field->type, &align);
4276 do_free_special_slot (offset, size);
4280 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4282 mono_threads_lock ();
4284 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4286 mono_threads_unlock ();
4290 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4292 /* Only ever called for ThreadLocal instances */
4293 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4295 mono_threads_lock ();
4296 do_free_special_slot (offset, size);
4297 mono_threads_unlock ();
4301 static void CALLBACK dummy_apc (ULONG_PTR param)
4307 * mono_thread_execute_interruption
4309 * Performs the operation that the requested thread state requires (abort,
4312 static MonoException*
4313 mono_thread_execute_interruption (void)
4315 MonoInternalThread *thread = mono_thread_internal_current ();
4316 MonoThread *sys_thread = mono_thread_current ();
4318 LOCK_THREAD (thread);
4320 /* MonoThread::interruption_requested can only be changed with atomics */
4321 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4322 /* this will consume pending APC calls */
4324 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4326 InterlockedDecrement (&thread_interruption_requested);
4328 /* Clear the interrupted flag of the thread so it can wait again */
4329 mono_thread_info_clear_self_interrupt ();
4332 if ((thread->state & ThreadState_AbortRequested) != 0) {
4333 UNLOCK_THREAD (thread);
4334 if (thread->abort_exc == NULL) {
4336 * This might be racy, but it has to be called outside the lock
4337 * since it calls managed code.
4339 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4341 return thread->abort_exc;
4343 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4344 /* calls UNLOCK_THREAD (thread) */
4345 self_suspend_internal ();
4348 else if ((thread->state & ThreadState_StopRequested) != 0) {
4349 /* FIXME: do this through the JIT? */
4351 UNLOCK_THREAD (thread);
4353 mono_thread_exit ();
4355 } else if (sys_thread->pending_exception) {
4358 exc = sys_thread->pending_exception;
4359 sys_thread->pending_exception = NULL;
4361 UNLOCK_THREAD (thread);
4363 } else if (thread->thread_interrupt_requested) {
4365 thread->thread_interrupt_requested = FALSE;
4366 UNLOCK_THREAD (thread);
4368 return(mono_get_exception_thread_interrupted ());
4371 UNLOCK_THREAD (thread);
4377 * mono_thread_request_interruption
4379 * A signal handler can call this method to request the interruption of a
4380 * thread. The result of the interruption will depend on the current state of
4381 * the thread. If the result is an exception that needs to be throw, it is
4382 * provided as return value.
4385 mono_thread_request_interruption (gboolean running_managed)
4387 MonoInternalThread *thread = mono_thread_internal_current ();
4389 /* The thread may already be stopping */
4394 if (thread->interrupt_on_stop &&
4395 thread->state & ThreadState_StopRequested &&
4396 thread->state & ThreadState_Background)
4400 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4402 InterlockedIncrement (&thread_interruption_requested);
4404 if (!running_managed || is_running_protected_wrapper ()) {
4405 /* Can't stop while in unmanaged code. Increase the global interruption
4406 request count. When exiting the unmanaged method the count will be
4407 checked and the thread will be interrupted. */
4409 /* this will awake the thread if it is in WaitForSingleObject
4411 /* Our implementation of this function ignores the func argument */
4413 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4415 mono_thread_info_self_interrupt ();
4420 return mono_thread_execute_interruption ();
4424 /*This function should be called by a thread after it has exited all of
4425 * its handle blocks at interruption time.*/
4427 mono_thread_resume_interruption (void)
4429 MonoInternalThread *thread = mono_thread_internal_current ();
4430 gboolean still_aborting;
4432 /* The thread may already be stopping */
4436 LOCK_THREAD (thread);
4437 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4438 UNLOCK_THREAD (thread);
4440 /*This can happen if the protected block called Thread::ResetAbort*/
4441 if (!still_aborting)
4444 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4446 InterlockedIncrement (&thread_interruption_requested);
4448 mono_thread_info_self_interrupt ();
4450 return mono_thread_execute_interruption ();
4453 gboolean mono_thread_interruption_requested ()
4455 if (thread_interruption_requested) {
4456 MonoInternalThread *thread = mono_thread_internal_current ();
4457 /* The thread may already be stopping */
4459 return (thread->interruption_requested);
4464 static MonoException*
4465 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4467 MonoInternalThread *thread = mono_thread_internal_current ();
4469 /* The thread may already be stopping */
4473 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4474 MonoException* exc = mono_thread_execute_interruption ();
4482 * Performs the interruption of the current thread, if one has been requested,
4483 * and the thread is not running a protected wrapper.
4484 * Return the exception which needs to be thrown, if any.
4487 mono_thread_interruption_checkpoint (void)
4489 return mono_thread_interruption_checkpoint_request (FALSE);
4493 * Performs the interruption of the current thread, if one has been requested.
4494 * Return the exception which needs to be thrown, if any.
4497 mono_thread_force_interruption_checkpoint_noraise (void)
4499 return mono_thread_interruption_checkpoint_request (TRUE);
4503 * mono_thread_get_and_clear_pending_exception:
4505 * Return any pending exceptions for the current thread and clear it as a side effect.
4508 mono_thread_get_and_clear_pending_exception (void)
4510 MonoInternalThread *thread = mono_thread_internal_current ();
4511 MonoThread *sys_thread = mono_thread_current ();
4513 /* The thread may already be stopping */
4517 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4518 return mono_thread_execute_interruption ();
4521 if (sys_thread->pending_exception) {
4522 MonoException *exc = sys_thread->pending_exception;
4524 sys_thread->pending_exception = NULL;
4532 * mono_set_pending_exception:
4534 * Set the pending exception of the current thread to EXC.
4535 * The exception will be thrown when execution returns to managed code.
4538 mono_set_pending_exception (MonoException *exc)
4540 MonoThread *thread = mono_thread_current ();
4542 /* The thread may already be stopping */
4546 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4548 mono_thread_request_interruption (FALSE);
4552 * mono_thread_interruption_request_flag:
4554 * Returns the address of a flag that will be non-zero if an interruption has
4555 * been requested for a thread. The thread to interrupt may not be the current
4556 * thread, so an additional call to mono_thread_interruption_requested() or
4557 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4560 gint32* mono_thread_interruption_request_flag ()
4562 return &thread_interruption_requested;
4566 mono_thread_init_apartment_state (void)
4569 MonoInternalThread* thread = mono_thread_internal_current ();
4571 /* Positive return value indicates success, either
4572 * S_OK if this is first CoInitialize call, or
4573 * S_FALSE if CoInitialize already called, but with same
4574 * threading model. A negative value indicates failure,
4575 * probably due to trying to change the threading model.
4577 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4578 ? COINIT_APARTMENTTHREADED
4579 : COINIT_MULTITHREADED) < 0) {
4580 thread->apartment_state = ThreadApartmentState_Unknown;
4586 mono_thread_cleanup_apartment_state (void)
4589 MonoInternalThread* thread = mono_thread_internal_current ();
4591 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4598 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4600 LOCK_THREAD (thread);
4601 thread->state |= state;
4602 UNLOCK_THREAD (thread);
4606 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4608 LOCK_THREAD (thread);
4609 thread->state &= ~state;
4610 UNLOCK_THREAD (thread);
4614 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4616 gboolean ret = FALSE;
4618 LOCK_THREAD (thread);
4620 if ((thread->state & test) != 0) {
4624 UNLOCK_THREAD (thread);
4629 static gboolean has_tls_get = FALSE;
4632 mono_runtime_set_has_tls_get (gboolean val)
4638 mono_runtime_has_tls_get (void)
4644 self_interrupt_thread (void *_unused)
4646 MonoThreadInfo *info = mono_thread_info_current ();
4647 MonoException *exc = mono_thread_execute_interruption ();
4648 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4649 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. */
4650 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4654 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4658 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4662 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4664 MonoJitInfo **dest = (MonoJitInfo **)data;
4670 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4672 MonoJitInfo *ji = NULL;
4677 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4678 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4679 * where we hold runtime locks.
4681 if (!mono_threads_is_coop_enabled ())
4682 mono_thread_info_set_is_async_context (TRUE);
4683 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4684 if (!mono_threads_is_coop_enabled ())
4685 mono_thread_info_set_is_async_context (FALSE);
4690 MonoInternalThread *thread;
4691 gboolean install_async_abort;
4692 MonoThreadInfoInterruptToken *interrupt_token;
4695 static SuspendThreadResult
4696 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4698 AbortThreadData *data = (AbortThreadData *)ud;
4699 MonoInternalThread *thread = data->thread;
4700 MonoJitInfo *ji = NULL;
4701 gboolean protected_wrapper;
4702 gboolean running_managed;
4704 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4705 return MonoResumeThread;
4707 /*someone is already interrupting it*/
4708 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4709 return MonoResumeThread;
4711 InterlockedIncrement (&thread_interruption_requested);
4713 ji = mono_thread_info_get_last_managed (info);
4714 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4715 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4717 if (!protected_wrapper && running_managed) {
4718 /*We are in managed code*/
4719 /*Set the thread to call */
4720 if (data->install_async_abort)
4721 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4722 return MonoResumeThread;
4725 * This will cause waits to be broken.
4726 * It will also prevent the thread from entering a wait, so if the thread returns
4727 * from the wait before it receives the abort signal, it will just spin in the wait
4728 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4731 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4733 return MonoResumeThread;
4738 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4740 AbortThreadData data;
4742 g_assert (thread != mono_thread_internal_current ());
4744 data.thread = thread;
4745 data.install_async_abort = install_async_abort;
4746 data.interrupt_token = NULL;
4748 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4749 if (data.interrupt_token)
4750 mono_thread_info_finish_interrupt (data.interrupt_token);
4751 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4755 self_abort_internal (void)
4759 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4760 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4762 exc = mono_thread_request_interruption (TRUE);
4764 mono_raise_exception (exc);
4766 mono_thread_info_self_interrupt ();
4770 MonoInternalThread *thread;
4772 MonoThreadInfoInterruptToken *interrupt_token;
4773 } SuspendThreadData;
4775 static SuspendThreadResult
4776 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4778 SuspendThreadData *data = (SuspendThreadData *)ud;
4779 MonoInternalThread *thread = data->thread;
4780 MonoJitInfo *ji = NULL;
4781 gboolean protected_wrapper;
4782 gboolean running_managed;
4784 ji = mono_thread_info_get_last_managed (info);
4785 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4786 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4788 if (running_managed && !protected_wrapper) {
4789 thread->state &= ~ThreadState_SuspendRequested;
4790 thread->state |= ThreadState_Suspended;
4791 return KeepSuspended;
4793 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4794 InterlockedIncrement (&thread_interruption_requested);
4795 if (data->interrupt)
4796 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4798 return MonoResumeThread;
4802 /* LOCKING: called with @thread synch_cs held, and releases it */
4804 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4806 SuspendThreadData data;
4808 g_assert (thread != mono_thread_internal_current ());
4810 data.thread = thread;
4811 data.interrupt = interrupt;
4812 data.interrupt_token = NULL;
4814 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4815 if (data.interrupt_token)
4816 mono_thread_info_finish_interrupt (data.interrupt_token);
4818 UNLOCK_THREAD (thread);
4821 /* LOCKING: called with @thread synch_cs held, and releases it */
4823 self_suspend_internal (void)
4825 MonoInternalThread *thread;
4827 thread = mono_thread_internal_current ();
4829 mono_thread_info_begin_self_suspend ();
4830 thread->state &= ~ThreadState_SuspendRequested;
4831 thread->state |= ThreadState_Suspended;
4833 UNLOCK_THREAD (thread);
4835 mono_thread_info_end_self_suspend ();
4839 * mono_thread_is_foreign:
4840 * @thread: the thread to query
4842 * This function allows one to determine if a thread was created by the mono runtime and has
4843 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4845 * Returns: TRUE if @thread was not created by the runtime.
4848 mono_thread_is_foreign (MonoThread *thread)
4850 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4851 return info->runtime_thread == FALSE;
4855 * mono_add_joinable_thread:
4857 * Add TID to the list of joinable threads.
4858 * LOCKING: Acquires the threads lock.
4861 mono_threads_add_joinable_thread (gpointer tid)
4865 * We cannot detach from threads because it causes problems like
4866 * 2fd16f60/r114307. So we collect them and join them when
4867 * we have time (in he finalizer thread).
4869 joinable_threads_lock ();
4870 if (!joinable_threads)
4871 joinable_threads = g_hash_table_new (NULL, NULL);
4872 g_hash_table_insert (joinable_threads, tid, tid);
4873 joinable_thread_count ++;
4874 joinable_threads_unlock ();
4876 mono_gc_finalize_notify ();
4881 * mono_threads_join_threads:
4883 * Join all joinable threads. This is called from the finalizer thread.
4884 * LOCKING: Acquires the threads lock.
4887 mono_threads_join_threads (void)
4890 GHashTableIter iter;
4897 if (!joinable_thread_count)
4901 joinable_threads_lock ();
4903 if (g_hash_table_size (joinable_threads)) {
4904 g_hash_table_iter_init (&iter, joinable_threads);
4905 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4906 thread = (pthread_t)tid;
4907 g_hash_table_remove (joinable_threads, key);
4908 joinable_thread_count --;
4911 joinable_threads_unlock ();
4913 if (thread != pthread_self ())
4914 /* This shouldn't block */
4915 pthread_join (thread, NULL);
4926 * Wait for thread TID to exit.
4927 * LOCKING: Acquires the threads lock.
4930 mono_thread_join (gpointer tid)
4934 gboolean found = FALSE;
4936 joinable_threads_lock ();
4937 if (!joinable_threads)
4938 joinable_threads = g_hash_table_new (NULL, NULL);
4939 if (g_hash_table_lookup (joinable_threads, tid)) {
4940 g_hash_table_remove (joinable_threads, tid);
4941 joinable_thread_count --;
4944 joinable_threads_unlock ();
4947 thread = (pthread_t)tid;
4948 pthread_join (thread, NULL);
4953 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4955 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4956 mono_thread_interruption_checkpoint ();
4959 static inline gboolean
4960 is_appdomainunloaded_exception (MonoClass *klass)
4962 return klass == mono_class_get_appdomain_unloaded_exception_class ();
4965 static inline gboolean
4966 is_threadabort_exception (MonoClass *klass)
4968 return klass == mono_defaults.threadabortexception_class;
4972 mono_thread_internal_unhandled_exception (MonoObject* exc)
4974 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4975 MonoClass *klass = exc->vtable->klass;
4976 if (is_threadabort_exception (klass)) {
4977 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4978 } else if (!is_appdomainunloaded_exception (klass)) {
4979 mono_unhandled_exception (exc);
4980 if (mono_environment_exitcode_get () == 1)
4987 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4989 mono_threads_get_thread_dump (out_threads, out_stack_traces);