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>
50 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
51 #define USE_TKILL_ON_ANDROID 1
54 #ifdef PLATFORM_ANDROID
57 #ifdef USE_TKILL_ON_ANDROID
58 extern int tkill (pid_t tid, int signal);
62 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
63 #define THREAD_DEBUG(a)
64 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_WAIT_DEBUG(a)
66 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
67 #define LIBGC_DEBUG(a)
69 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
70 #define SPIN_LOCK(i) do { \
71 if (SPIN_TRYLOCK (i)) \
75 #define SPIN_UNLOCK(i) i = 0
77 #define LOCK_THREAD(thread) lock_thread((thread))
78 #define UNLOCK_THREAD(thread) unlock_thread((thread))
80 /* Provide this for systems with glib < 2.6 */
81 #ifndef G_GSIZE_FORMAT
82 # if GLIB_SIZEOF_LONG == 8
83 # define G_GSIZE_FORMAT "lu"
85 # define G_GSIZE_FORMAT "u"
91 guint32 (*func)(void *);
107 typedef struct _StaticDataFreeList StaticDataFreeList;
108 struct _StaticDataFreeList {
109 StaticDataFreeList *next;
117 StaticDataFreeList *freelist;
120 /* Number of cached culture objects in the MonoThread->cached_culture_info array
121 * (per-type): we use the first NUM entries for CultureInfo and the last for
122 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
124 #define NUM_CACHED_CULTURES 4
125 #define CULTURES_START_IDX 0
126 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
128 /* Controls access to the 'threads' hash table */
129 static void mono_threads_lock (void);
130 static void mono_threads_unlock (void);
131 static MonoCoopMutex threads_mutex;
133 /* Controls access to the 'joinable_threads' hash table */
134 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
135 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
136 static mono_mutex_t joinable_threads_mutex;
138 /* Holds current status of static data heap */
139 static StaticDataInfo thread_static_info;
140 static StaticDataInfo context_static_info;
142 /* The hash of existing threads (key is thread ID, value is
143 * MonoInternalThread*) that need joining before exit
145 static MonoGHashTable *threads=NULL;
147 /* List of app context GC handles.
148 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
150 static GHashTable *contexts = NULL;
153 * Threads which are starting up and they are not in the 'threads' hash yet.
154 * When handle_store is called for a thread, it will be removed from this hash table.
155 * Protected by mono_threads_lock ().
157 static MonoGHashTable *threads_starting_up = NULL;
159 /* The TLS key that holds the MonoObject assigned to each thread */
160 static MonoNativeTlsKey current_object_key;
163 /* Protected by the threads lock */
164 static GHashTable *joinable_threads;
165 static int joinable_thread_count;
167 #ifdef MONO_HAVE_FAST_TLS
168 /* we need to use both the Tls* functions and __thread because
169 * the gc needs to see all the threads
171 MONO_FAST_TLS_DECLARE(tls_current_object);
172 #define SET_CURRENT_OBJECT(x) do { \
173 MONO_FAST_TLS_SET (tls_current_object, x); \
174 mono_native_tls_set_value (current_object_key, x); \
176 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
178 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
179 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
182 /* function called at thread start */
183 static MonoThreadStartCB mono_thread_start_cb = NULL;
185 /* function called at thread attach */
186 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
188 /* function called at thread cleanup */
189 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
191 /* function called to notify the runtime about a pending exception on the current thread */
192 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
194 /* The default stack size for each thread */
195 static guint32 default_stacksize = 0;
196 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
198 static void thread_adjust_static_data (MonoInternalThread *thread);
199 static void context_adjust_static_data (MonoAppContext *ctx);
200 static void mono_free_static_data (gpointer* static_data);
201 static void mono_init_static_data_info (StaticDataInfo *static_data);
202 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
203 static gboolean mono_thread_resume (MonoInternalThread* thread);
204 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
205 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
206 static void self_suspend_internal (MonoInternalThread *thread);
208 static MonoException* mono_thread_execute_interruption ();
209 static void ref_stack_destroy (gpointer rs);
211 /* Spin lock for InterlockedXXX 64 bit functions */
212 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
213 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
214 static mono_mutex_t interlocked_mutex;
216 /* global count of thread interruptions requested */
217 static gint32 thread_interruption_requested = 0;
219 /* Event signaled when a thread changes its background mode */
220 static HANDLE background_change_event;
222 static gboolean shutting_down = FALSE;
224 static gint32 managed_thread_id_counter = 0;
227 mono_threads_lock (void)
229 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
233 mono_threads_unlock (void)
235 mono_locks_coop_release (&threads_mutex, ThreadsLock);
240 get_next_managed_thread_id (void)
242 return InterlockedIncrement (&managed_thread_id_counter);
246 mono_thread_get_tls_key (void)
248 return current_object_key;
252 mono_thread_get_tls_offset (void)
255 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
259 static inline MonoNativeThreadId
260 thread_get_tid (MonoInternalThread *thread)
262 /* We store the tid as a guint64 to keep the object layout constant between platforms */
263 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
266 /* handle_store() and handle_remove() manage the array of threads that
267 * still need to be waited for when the main thread exits.
269 * If handle_store() returns FALSE the thread must not be started
270 * because Mono is shutting down.
272 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
274 mono_threads_lock ();
276 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
278 if (threads_starting_up)
279 mono_g_hash_table_remove (threads_starting_up, thread);
281 if (shutting_down && !force_attach) {
282 mono_threads_unlock ();
287 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
288 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
291 /* We don't need to duplicate thread->handle, because it is
292 * only closed when the thread object is finalized by the GC.
294 g_assert (thread->internal_thread);
295 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
296 thread->internal_thread);
298 mono_threads_unlock ();
303 static gboolean handle_remove(MonoInternalThread *thread)
306 gsize tid = thread->tid;
308 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
310 mono_threads_lock ();
313 /* We have to check whether the thread object for the
314 * tid is still the same in the table because the
315 * thread might have been destroyed and the tid reused
316 * in the meantime, in which case the tid would be in
317 * the table, but with another thread object.
319 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
320 mono_g_hash_table_remove (threads, (gpointer)tid);
329 mono_threads_unlock ();
331 /* Don't close the handle here, wait for the object finalizer
332 * to do it. Otherwise, the following race condition applies:
334 * 1) Thread exits (and handle_remove() closes the handle)
336 * 2) Some other handle is reassigned the same slot
338 * 3) Another thread tries to join the first thread, and
339 * blocks waiting for the reassigned handle to be signalled
340 * (which might never happen). This is possible, because the
341 * thread calling Join() still has a reference to the first
347 static void ensure_synch_cs_set (MonoInternalThread *thread)
349 MonoCoopMutex *synch_cs;
351 if (thread->synch_cs != NULL) {
355 synch_cs = g_new0 (MonoCoopMutex, 1);
356 mono_coop_mutex_init_recursive (synch_cs);
358 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
359 synch_cs, NULL) != NULL) {
360 /* Another thread must have installed this CS */
361 mono_coop_mutex_destroy (synch_cs);
367 lock_thread (MonoInternalThread *thread)
369 if (!thread->synch_cs)
370 ensure_synch_cs_set (thread);
372 g_assert (thread->synch_cs);
374 mono_coop_mutex_lock (thread->synch_cs);
378 unlock_thread (MonoInternalThread *thread)
380 mono_coop_mutex_unlock (thread->synch_cs);
384 * NOTE: this function can be called also for threads different from the current one:
385 * make sure no code called from it will ever assume it is run on the thread that is
386 * getting cleaned up.
388 static void thread_cleanup (MonoInternalThread *thread)
390 g_assert (thread != NULL);
392 if (thread->abort_state_handle) {
393 mono_gchandle_free (thread->abort_state_handle);
394 thread->abort_state_handle = 0;
396 thread->abort_exc = NULL;
397 thread->current_appcontext = NULL;
400 * This is necessary because otherwise we might have
401 * cross-domain references which will not get cleaned up when
402 * the target domain is unloaded.
404 if (thread->cached_culture_info) {
406 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
407 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
411 * thread->synch_cs can be NULL if this was called after
412 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
413 * This can happen only during shutdown.
414 * The shutting_down flag is not always set, so we can't assert on it.
416 if (thread->synch_cs)
417 LOCK_THREAD (thread);
419 thread->state |= ThreadState_Stopped;
420 thread->state &= ~ThreadState_Background;
422 if (thread->synch_cs)
423 UNLOCK_THREAD (thread);
426 An interruption request has leaked to cleanup. Adjust the global counter.
428 This can happen is the abort source thread finds the abortee (this) thread
429 in unmanaged code. If this thread never trips back to managed code or check
430 the local flag it will be left set and positively unbalance the global counter.
432 Leaving the counter unbalanced will cause a performance degradation since all threads
433 will now keep checking their local flags all the time.
435 if (InterlockedExchange (&thread->interruption_requested, 0))
436 InterlockedDecrement (&thread_interruption_requested);
438 /* if the thread is not in the hash it has been removed already */
439 if (!handle_remove (thread)) {
440 if (thread == mono_thread_internal_current ()) {
441 mono_domain_unset ();
442 mono_memory_barrier ();
444 /* This needs to be called even if handle_remove () fails */
445 if (mono_thread_cleanup_fn)
446 mono_thread_cleanup_fn (thread_get_tid (thread));
449 mono_release_type_locks (thread);
451 mono_profiler_thread_end (thread->tid);
453 if (thread == mono_thread_internal_current ()) {
455 * This will signal async signal handlers that the thread has exited.
456 * The profiler callback needs this to be set, so it cannot be done earlier.
458 mono_domain_unset ();
459 mono_memory_barrier ();
462 if (thread == mono_thread_internal_current ())
463 mono_thread_pop_appdomain_ref ();
465 thread->cached_culture_info = NULL;
467 mono_free_static_data (thread->static_data);
468 thread->static_data = NULL;
469 ref_stack_destroy (thread->appdomain_refs);
470 thread->appdomain_refs = NULL;
472 if (mono_thread_cleanup_fn)
473 mono_thread_cleanup_fn (thread_get_tid (thread));
475 if (mono_gc_is_moving ()) {
476 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
477 thread->thread_pinning_ref = NULL;
482 * A special static data offset (guint32) consists of 3 parts:
484 * [0] 6-bit index into the array of chunks.
485 * [6] 25-bit offset into the array.
486 * [31] Bit indicating thread or context static.
491 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
502 } SpecialStaticOffset;
504 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
505 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
507 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
508 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
509 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
510 (((SpecialStaticOffset *) &(x))->fields.f)
513 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
515 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
517 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
518 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
520 return ((char *) thread->static_data [idx]) + off;
524 get_context_static_data (MonoAppContext *ctx, guint32 offset)
526 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
528 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
529 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
531 return ((char *) ctx->static_data [idx]) + off;
535 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
537 static MonoClassField *current_thread_field = NULL;
541 if (!current_thread_field) {
542 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
543 g_assert (current_thread_field);
546 mono_class_vtable (domain, mono_defaults.thread_class);
547 mono_domain_lock (domain);
548 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
549 mono_domain_unlock (domain);
552 return (MonoThread **)get_thread_static_data (thread, offset);
556 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
558 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
560 g_assert (current->obj.vtable->domain == domain);
562 g_assert (!*current_thread_ptr);
563 *current_thread_ptr = current;
567 create_thread_object (MonoDomain *domain)
569 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
570 return (MonoThread*)mono_gc_alloc_mature (vt);
574 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
576 MonoThread *thread = create_thread_object (domain);
577 MONO_OBJECT_SETREF (thread, internal_thread, internal);
581 static MonoInternalThread*
582 create_internal_thread (void)
584 MonoInternalThread *thread;
587 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
588 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
590 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
591 mono_coop_mutex_init_recursive (thread->synch_cs);
593 thread->apartment_state = ThreadApartmentState_Unknown;
594 thread->managed_id = get_next_managed_thread_id ();
595 if (mono_gc_is_moving ()) {
596 thread->thread_pinning_ref = thread;
597 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
604 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
606 MonoDomain *domain = mono_get_root_domain ();
608 if (!candidate || candidate->obj.vtable->domain != domain)
609 candidate = new_thread_with_internal (domain, thread);
610 set_current_thread_for_domain (domain, thread, candidate);
611 g_assert (!thread->root_domain_thread);
612 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
615 static guint32 WINAPI start_wrapper_internal(void *data)
617 MonoThreadInfo *info;
618 StartInfo *start_info = (StartInfo *)data;
619 guint32 (*start_func)(void *);
623 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
626 MonoInternalThread *internal = start_info->obj->internal_thread;
627 MonoObject *start_delegate = start_info->delegate;
628 MonoDomain *domain = start_info->obj->obj.vtable->domain;
630 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
632 /* We can be sure start_info->obj->tid and
633 * start_info->obj->handle have been set, because the thread
634 * was created suspended, and these values were set before the
638 info = mono_thread_info_current ();
640 internal->thread_info = info;
641 internal->small_id = info->small_id;
645 SET_CURRENT_OBJECT (internal);
647 /* Every thread references the appdomain which created it */
648 mono_thread_push_appdomain_ref (domain);
650 if (!mono_domain_set (domain, FALSE)) {
651 /* No point in raising an appdomain_unloaded exception here */
652 /* FIXME: Cleanup here */
653 mono_thread_pop_appdomain_ref ();
657 start_func = start_info->func;
658 start_arg = start_info->obj->start_obj;
660 start_arg = start_info->start_arg;
662 /* We have to do this here because mono_thread_new_init()
663 requires that root_domain_thread is set up. */
664 thread_adjust_static_data (internal);
665 init_root_domain_thread (internal, start_info->obj);
667 /* This MUST be called before any managed code can be
668 * executed, as it calls the callback function that (for the
669 * jit) sets the lmf marker.
671 mono_thread_new_init (tid, &tid, start_func);
672 internal->stack_ptr = &tid;
673 if (domain != mono_get_root_domain ())
674 set_current_thread_for_domain (domain, internal, start_info->obj);
676 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
678 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
680 /* On 2.0 profile (and higher), set explicitly since state might have been
682 if (internal->apartment_state == ThreadApartmentState_Unknown)
683 internal->apartment_state = ThreadApartmentState_MTA;
685 mono_thread_init_apartment_state ();
687 if(internal->start_notify!=NULL) {
688 /* Let the thread that called Start() know we're
691 ReleaseSemaphore (internal->start_notify, 1, NULL);
695 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
699 * Call this after calling start_notify, since the profiler callback might want
700 * to lock the thread, and the lock is held by thread_start () which waits for
703 mono_profiler_thread_start (tid);
705 /* if the name was set before starting, we didn't invoke the profiler callback */
706 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
707 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
708 mono_profiler_thread_name (internal->tid, tname);
711 /* start_func is set only for unmanaged start functions */
713 start_func (start_arg);
716 g_assert (start_delegate != NULL);
717 args [0] = start_arg;
718 /* we may want to handle the exception here. See comment below on unhandled exceptions */
719 mono_runtime_delegate_invoke (start_delegate, args, NULL);
722 /* If the thread calls ExitThread at all, this remaining code
723 * will not be executed, but the main thread will eventually
724 * call thread_cleanup() on this thread's behalf.
727 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
729 /* Do any cleanup needed for apartment state. This
730 * cannot be done in thread_cleanup since thread_cleanup could be
731 * called for a thread other than the current thread.
732 * mono_thread_cleanup_apartment_state cleans up apartment
733 * for the current thead */
734 mono_thread_cleanup_apartment_state ();
736 thread_cleanup (internal);
740 /* Remove the reference to the thread object in the TLS data,
741 * so the thread object can be finalized. This won't be
742 * reached if the thread threw an uncaught exception, so those
743 * thread handles will stay referenced :-( (This is due to
744 * missing support for scanning thread-specific data in the
745 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
748 SET_CURRENT_OBJECT (NULL);
753 static guint32 WINAPI start_wrapper(void *data)
757 /* Avoid scanning the frames above this frame during a GC */
758 mono_gc_set_stack_end ((void*)&dummy);
760 return start_wrapper_internal (data);
766 * Common thread creation code.
767 * LOCKING: Acquires the threads lock.
770 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
771 gboolean throw_on_failure)
773 HANDLE thread_handle;
774 MonoNativeThreadId tid;
775 guint32 create_flags;
778 * Join joinable threads to prevent running out of threads since the finalizer
779 * thread might be blocked/backlogged.
781 mono_threads_join_threads ();
783 mono_threads_lock ();
786 mono_threads_unlock ();
789 if (threads_starting_up == NULL) {
790 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
791 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
793 mono_g_hash_table_insert (threads_starting_up, thread, thread);
794 mono_threads_unlock ();
796 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
797 if (!internal->start_notify) {
798 mono_threads_lock ();
799 mono_g_hash_table_remove (threads_starting_up, thread);
800 mono_threads_unlock ();
801 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
807 stack_size = default_stacksize_for_thread (internal);
809 /* Create suspended, so we can do some housekeeping before the thread
812 create_flags = CREATE_SUSPENDED;
814 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
815 stack_size, create_flags, &tid);
817 if (thread_handle == NULL) {
818 /* The thread couldn't be created, so throw an exception */
819 mono_threads_lock ();
820 mono_g_hash_table_remove (threads_starting_up, thread);
821 mono_threads_unlock ();
823 if (throw_on_failure)
824 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
826 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
829 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
831 internal->handle = thread_handle;
832 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
834 internal->threadpool_thread = threadpool_thread;
835 if (threadpool_thread)
836 mono_thread_set_state (internal, ThreadState_Background);
838 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
840 /* Only store the handle when the thread is about to be
841 * launched, to avoid the main thread deadlocking while trying
842 * to clean up a thread that will never be signalled.
844 if (!handle_store (thread, FALSE))
847 mono_thread_info_resume (tid);
849 if (internal->start_notify) {
851 * Wait for the thread to set up its TLS data etc, so
852 * theres no potential race condition if someone tries
853 * to look up the data believing the thread has
856 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));
858 MONO_PREPARE_BLOCKING;
859 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
860 MONO_FINISH_BLOCKING;
862 CloseHandle (internal->start_notify);
863 internal->start_notify = NULL;
866 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));
871 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
873 if (mono_thread_start_cb) {
874 mono_thread_start_cb (tid, stack_start, func);
878 void mono_threads_set_default_stacksize (guint32 stacksize)
880 default_stacksize = stacksize;
883 guint32 mono_threads_get_default_stacksize (void)
885 return default_stacksize;
889 * mono_thread_create_internal:
891 * ARG should not be a GC reference.
894 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
897 MonoInternalThread *internal;
898 StartInfo *start_info;
901 thread = create_thread_object (domain);
902 internal = create_internal_thread ();
903 MONO_OBJECT_SETREF (thread, internal_thread, internal);
905 start_info = g_new0 (StartInfo, 1);
906 start_info->func = (guint32 (*)(void *))func;
907 start_info->obj = thread;
908 start_info->start_arg = arg;
910 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
914 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
915 #ifndef MONO_CROSS_COMPILE
916 if (mono_check_corlib_version () == NULL)
917 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
924 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
926 mono_thread_create_internal (domain, func, arg, FALSE, 0);
930 mono_thread_attach (MonoDomain *domain)
932 return mono_thread_attach_full (domain, FALSE);
936 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
938 MonoThreadInfo *info;
939 MonoInternalThread *thread;
940 MonoThread *current_thread;
941 HANDLE thread_handle;
942 MonoNativeThreadId tid;
944 if ((thread = mono_thread_internal_current ())) {
945 if (domain != mono_domain_get ())
946 mono_domain_set (domain, TRUE);
947 /* Already attached */
948 return mono_thread_current ();
951 if (!mono_gc_register_thread (&domain)) {
952 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 ());
955 thread = create_internal_thread ();
957 thread_handle = mono_thread_info_open_handle ();
958 g_assert (thread_handle);
960 tid=mono_native_thread_id_get ();
962 thread->handle = thread_handle;
963 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
964 thread->stack_ptr = &tid;
966 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
968 info = mono_thread_info_current ();
970 thread->thread_info = info;
971 thread->small_id = info->small_id;
973 current_thread = new_thread_with_internal (domain, thread);
975 if (!handle_store (current_thread, force_attach)) {
976 /* Mono is shutting down, so just wait for the end */
978 mono_thread_info_sleep (10000, NULL);
981 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
983 SET_CURRENT_OBJECT (thread);
984 mono_domain_set (domain, TRUE);
986 thread_adjust_static_data (thread);
988 init_root_domain_thread (thread, current_thread);
989 if (domain != mono_get_root_domain ())
990 set_current_thread_for_domain (domain, thread, current_thread);
993 if (mono_thread_attach_cb) {
997 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1000 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1002 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1005 // FIXME: Need a separate callback
1006 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1008 return current_thread;
1012 mono_thread_detach_internal (MonoInternalThread *thread)
1014 g_return_if_fail (thread != NULL);
1016 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1018 thread_cleanup (thread);
1020 SET_CURRENT_OBJECT (NULL);
1021 mono_domain_unset ();
1023 /* Don't need to CloseHandle this thread, even though we took a
1024 * reference in mono_thread_attach (), because the GC will do it
1025 * when the Thread object is finalised.
1030 mono_thread_detach (MonoThread *thread)
1033 mono_thread_detach_internal (thread->internal_thread);
1037 * mono_thread_detach_if_exiting:
1039 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1040 * This should be used at the end of embedding code which calls into managed code, and which
1041 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1044 mono_thread_detach_if_exiting (void)
1046 if (mono_thread_info_is_exiting ()) {
1047 MonoInternalThread *thread;
1049 thread = mono_thread_internal_current ();
1051 mono_thread_detach_internal (thread);
1052 mono_thread_info_detach ();
1060 MonoInternalThread *thread = mono_thread_internal_current ();
1062 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1064 thread_cleanup (thread);
1065 SET_CURRENT_OBJECT (NULL);
1066 mono_domain_unset ();
1068 /* we could add a callback here for embedders to use. */
1069 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1070 exit (mono_environment_exitcode_get ());
1071 mono_thread_info_exit ();
1075 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1077 MonoInternalThread *internal = create_internal_thread ();
1079 internal->state = ThreadState_Unstarted;
1081 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1085 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1088 StartInfo *start_info;
1089 MonoInternalThread *internal;
1092 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1094 if (!this_obj->internal_thread)
1095 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1096 internal = this_obj->internal_thread;
1098 LOCK_THREAD (internal);
1100 if ((internal->state & ThreadState_Unstarted) == 0) {
1101 UNLOCK_THREAD (internal);
1102 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1106 if ((internal->state & ThreadState_Aborted) != 0) {
1107 UNLOCK_THREAD (internal);
1110 /* This is freed in start_wrapper */
1111 start_info = g_new0 (StartInfo, 1);
1112 start_info->func = NULL;
1113 start_info->start_arg = NULL;
1114 start_info->delegate = start;
1115 start_info->obj = this_obj;
1116 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1118 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1120 UNLOCK_THREAD (internal);
1124 internal->state &= ~ThreadState_Unstarted;
1126 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1128 UNLOCK_THREAD (internal);
1129 return internal->handle;
1133 * This is called from the finalizer of the internal thread object.
1136 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1138 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1141 * Since threads keep a reference to their thread object while running, by the time this function is called,
1142 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1143 * when thread_cleanup () can be called after this.
1146 CloseHandle (thread);
1148 if (this_obj->synch_cs) {
1149 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1150 this_obj->synch_cs = NULL;
1151 mono_coop_mutex_destroy (synch_cs);
1155 if (this_obj->name) {
1156 void *name = this_obj->name;
1157 this_obj->name = NULL;
1163 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1166 MonoInternalThread *thread = mono_thread_internal_current ();
1168 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1170 mono_thread_current_check_pending_interrupt ();
1173 gboolean alerted = FALSE;
1175 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1177 res = mono_thread_info_sleep (ms, &alerted);
1179 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1182 MonoException* exc = mono_thread_execute_interruption ();
1184 mono_raise_exception (exc);
1196 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1201 ves_icall_System_Threading_Thread_GetDomainID (void)
1203 return mono_domain_get()->domain_id;
1207 ves_icall_System_Threading_Thread_Yield (void)
1209 return mono_thread_info_yield ();
1213 * mono_thread_get_name:
1215 * Return the name of the thread. NAME_LEN is set to the length of the name.
1216 * Return NULL if the thread has no name. The returned memory is owned by the
1220 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1224 LOCK_THREAD (this_obj);
1226 if (!this_obj->name) {
1230 *name_len = this_obj->name_len;
1231 res = g_new (gunichar2, this_obj->name_len);
1232 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1235 UNLOCK_THREAD (this_obj);
1241 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1245 LOCK_THREAD (this_obj);
1247 if (!this_obj->name)
1250 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1252 UNLOCK_THREAD (this_obj);
1258 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1260 LOCK_THREAD (this_obj);
1262 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1263 UNLOCK_THREAD (this_obj);
1265 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1268 if (this_obj->name) {
1269 g_free (this_obj->name);
1270 this_obj->name_len = 0;
1273 this_obj->name = g_new (gunichar2, mono_string_length (name));
1274 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1275 this_obj->name_len = mono_string_length (name);
1278 this_obj->name = NULL;
1281 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1283 UNLOCK_THREAD (this_obj);
1285 if (this_obj->name && this_obj->tid) {
1286 char *tname = mono_string_to_utf8 (name);
1287 mono_profiler_thread_name (this_obj->tid, tname);
1288 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1294 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1296 mono_thread_set_name_internal (this_obj, name, TRUE);
1300 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1302 return ThreadPriority_Lowest;
1306 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1310 /* If the array is already in the requested domain, we just return it,
1311 otherwise we return a copy in that domain. */
1313 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1320 if (mono_object_domain (arr) == domain)
1323 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1324 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1329 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1331 return byte_array_to_domain (arr, mono_get_root_domain ());
1335 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1337 return byte_array_to_domain (arr, mono_domain_get ());
1341 mono_thread_current (void)
1343 MonoDomain *domain = mono_domain_get ();
1344 MonoInternalThread *internal = mono_thread_internal_current ();
1345 MonoThread **current_thread_ptr;
1347 g_assert (internal);
1348 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1350 if (!*current_thread_ptr) {
1351 g_assert (domain != mono_get_root_domain ());
1352 *current_thread_ptr = new_thread_with_internal (domain, internal);
1354 return *current_thread_ptr;
1357 /* Return the thread object belonging to INTERNAL in the current domain */
1359 mono_thread_current_for_thread (MonoInternalThread *internal)
1361 MonoDomain *domain = mono_domain_get ();
1362 MonoThread **current_thread_ptr;
1364 g_assert (internal);
1365 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1367 if (!*current_thread_ptr) {
1368 g_assert (domain != mono_get_root_domain ());
1369 *current_thread_ptr = new_thread_with_internal (domain, internal);
1371 return *current_thread_ptr;
1375 mono_thread_internal_current (void)
1377 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1378 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1383 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1385 MonoInternalThread *thread = this_obj->internal_thread;
1386 HANDLE handle = thread->handle;
1387 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1390 mono_thread_current_check_pending_interrupt ();
1392 LOCK_THREAD (thread);
1394 if ((thread->state & ThreadState_Unstarted) != 0) {
1395 UNLOCK_THREAD (thread);
1397 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1401 UNLOCK_THREAD (thread);
1406 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1408 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1410 MONO_PREPARE_BLOCKING;
1411 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1412 MONO_FINISH_BLOCKING;
1414 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1416 if(ret==WAIT_OBJECT_0) {
1417 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1422 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1428 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1436 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1438 MONO_PREPARE_BLOCKING;
1440 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1442 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1443 MONO_FINISH_BLOCKING;
1445 if (ret != WAIT_IO_COMPLETION)
1448 exc = mono_thread_execute_interruption ();
1450 mono_raise_exception (exc);
1455 /* Re-calculate ms according to the time passed */
1456 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1457 if (diff_ms >= ms) {
1461 wait = ms - diff_ms;
1467 /* FIXME: exitContext isnt documented */
1468 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1474 MonoObject *waitHandle;
1475 MonoInternalThread *thread = mono_thread_internal_current ();
1477 /* Do this WaitSleepJoin check before creating objects */
1478 mono_thread_current_check_pending_interrupt ();
1480 /* We fail in managed if the array has more than 64 elements */
1481 numhandles = (guint32)mono_array_length(mono_handles);
1482 handles = g_new0(HANDLE, numhandles);
1484 for(i = 0; i < numhandles; i++) {
1485 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1486 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1493 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1495 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1497 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1501 if(ret==WAIT_FAILED) {
1502 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1504 } else if(ret==WAIT_TIMEOUT) {
1505 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1512 /* FIXME: exitContext isnt documented */
1513 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1515 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1516 uintptr_t numhandles;
1519 MonoObject *waitHandle;
1520 MonoInternalThread *thread = mono_thread_internal_current ();
1522 /* Do this WaitSleepJoin check before creating objects */
1523 mono_thread_current_check_pending_interrupt ();
1525 numhandles = mono_array_length(mono_handles);
1526 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1529 for(i = 0; i < numhandles; i++) {
1530 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1531 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1538 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1540 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1542 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1544 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1547 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1549 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1550 return ret - WAIT_OBJECT_0;
1552 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1553 return ret - WAIT_ABANDONED_0;
1560 /* FIXME: exitContext isnt documented */
1561 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1564 MonoInternalThread *thread = mono_thread_internal_current ();
1566 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1572 mono_thread_current_check_pending_interrupt ();
1574 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1576 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1578 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1580 if(ret==WAIT_FAILED) {
1581 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1583 } else if(ret==WAIT_TIMEOUT) {
1584 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1592 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1595 MonoInternalThread *thread = mono_thread_internal_current ();
1600 mono_thread_current_check_pending_interrupt ();
1602 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1604 MONO_PREPARE_BLOCKING;
1605 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1606 MONO_FINISH_BLOCKING;
1608 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1610 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1613 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1620 mutex = CreateMutex (NULL, owned, NULL);
1622 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1624 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1632 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1633 return(ReleaseMutex (handle));
1636 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1642 *error = ERROR_SUCCESS;
1644 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1646 *error = GetLastError ();
1653 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1660 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1662 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1663 mono_string_chars (name));
1665 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1673 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1677 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1682 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1686 *error = ERROR_SUCCESS;
1688 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1690 *error = GetLastError ();
1696 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1703 event = CreateEvent (NULL, manual, initial, NULL);
1705 event = CreateEvent (NULL, manual, initial,
1706 mono_string_chars (name));
1708 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1716 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1717 return (SetEvent(handle));
1720 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1721 return (ResetEvent(handle));
1725 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1726 CloseHandle (handle);
1729 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1735 *error = ERROR_SUCCESS;
1737 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1739 *error = GetLastError ();
1745 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1747 return InterlockedIncrement (location);
1750 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1752 #if SIZEOF_VOID_P == 4
1753 if (G_UNLIKELY ((size_t)location & 0x7)) {
1755 mono_interlocked_lock ();
1758 mono_interlocked_unlock ();
1762 return InterlockedIncrement64 (location);
1765 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1767 return InterlockedDecrement(location);
1770 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1772 #if SIZEOF_VOID_P == 4
1773 if (G_UNLIKELY ((size_t)location & 0x7)) {
1775 mono_interlocked_lock ();
1778 mono_interlocked_unlock ();
1782 return InterlockedDecrement64 (location);
1785 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1787 return InterlockedExchange(location, value);
1790 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1793 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1794 mono_gc_wbarrier_generic_nostore (location);
1798 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1800 return InterlockedExchangePointer(location, value);
1803 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1805 IntFloatUnion val, ret;
1808 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1814 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1816 #if SIZEOF_VOID_P == 4
1817 if (G_UNLIKELY ((size_t)location & 0x7)) {
1819 mono_interlocked_lock ();
1822 mono_interlocked_unlock ();
1826 return InterlockedExchange64 (location, value);
1830 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1832 LongDoubleUnion val, ret;
1835 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1840 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1842 return InterlockedCompareExchange(location, value, comparand);
1845 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1847 gint32 r = InterlockedCompareExchange(location, value, comparand);
1848 *success = r == comparand;
1852 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1855 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1856 mono_gc_wbarrier_generic_nostore (location);
1860 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1862 return InterlockedCompareExchangePointer(location, value, comparand);
1865 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1867 IntFloatUnion val, ret, cmp;
1870 cmp.fval = comparand;
1871 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1877 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1879 #if SIZEOF_VOID_P == 8
1880 LongDoubleUnion val, comp, ret;
1883 comp.fval = comparand;
1884 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1890 mono_interlocked_lock ();
1892 if (old == comparand)
1894 mono_interlocked_unlock ();
1901 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1903 #if SIZEOF_VOID_P == 4
1904 if (G_UNLIKELY ((size_t)location & 0x7)) {
1906 mono_interlocked_lock ();
1908 if (old == comparand)
1910 mono_interlocked_unlock ();
1914 return InterlockedCompareExchange64 (location, value, comparand);
1918 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1921 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
1922 mono_gc_wbarrier_generic_nostore (location);
1927 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1930 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
1931 mono_gc_wbarrier_generic_nostore (location);
1936 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1938 return InterlockedAdd (location, value);
1942 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1944 #if SIZEOF_VOID_P == 4
1945 if (G_UNLIKELY ((size_t)location & 0x7)) {
1947 mono_interlocked_lock ();
1950 mono_interlocked_unlock ();
1954 return InterlockedAdd64 (location, value);
1958 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1960 #if SIZEOF_VOID_P == 4
1961 if (G_UNLIKELY ((size_t)location & 0x7)) {
1963 mono_interlocked_lock ();
1965 mono_interlocked_unlock ();
1969 return InterlockedRead64 (location);
1973 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1975 mono_memory_barrier ();
1979 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
1981 mono_thread_clr_state (this_obj, (MonoThreadState)state);
1983 if (state & ThreadState_Background) {
1984 /* If the thread changes the background mode, the main thread has to
1985 * be notified, since it has to rebuild the list of threads to
1988 SetEvent (background_change_event);
1993 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
1995 mono_thread_set_state (this_obj, (MonoThreadState)state);
1997 if (state & ThreadState_Background) {
1998 /* If the thread changes the background mode, the main thread has to
1999 * be notified, since it has to rebuild the list of threads to
2002 SetEvent (background_change_event);
2007 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2011 LOCK_THREAD (this_obj);
2013 state = this_obj->state;
2015 UNLOCK_THREAD (this_obj);
2020 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2022 MonoInternalThread *current;
2024 MonoInternalThread *thread = this_obj->internal_thread;
2026 LOCK_THREAD (thread);
2028 current = mono_thread_internal_current ();
2030 thread->thread_interrupt_requested = TRUE;
2031 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2033 UNLOCK_THREAD (thread);
2036 abort_thread_internal (thread, TRUE, FALSE);
2040 void mono_thread_current_check_pending_interrupt ()
2042 MonoInternalThread *thread = mono_thread_internal_current ();
2043 gboolean throw_ = FALSE;
2045 LOCK_THREAD (thread);
2047 if (thread->thread_interrupt_requested) {
2049 thread->thread_interrupt_requested = FALSE;
2052 UNLOCK_THREAD (thread);
2055 mono_raise_exception (mono_get_exception_thread_interrupted ());
2060 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2062 LOCK_THREAD (thread);
2064 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2065 (thread->state & ThreadState_StopRequested) != 0 ||
2066 (thread->state & ThreadState_Stopped) != 0)
2068 UNLOCK_THREAD (thread);
2072 if ((thread->state & ThreadState_Unstarted) != 0) {
2073 thread->state |= ThreadState_Aborted;
2074 UNLOCK_THREAD (thread);
2078 thread->state |= ThreadState_AbortRequested;
2079 if (thread->abort_state_handle)
2080 mono_gchandle_free (thread->abort_state_handle);
2082 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2083 g_assert (thread->abort_state_handle);
2085 thread->abort_state_handle = 0;
2087 thread->abort_exc = NULL;
2089 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));
2091 /* During shutdown, we can't wait for other threads */
2093 /* Make sure the thread is awake */
2094 mono_thread_resume (thread);
2096 UNLOCK_THREAD (thread);
2098 abort_thread_internal (thread, TRUE, TRUE);
2102 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2104 MonoInternalThread *thread = mono_thread_internal_current ();
2105 gboolean was_aborting;
2107 LOCK_THREAD (thread);
2108 was_aborting = thread->state & ThreadState_AbortRequested;
2109 thread->state &= ~ThreadState_AbortRequested;
2110 UNLOCK_THREAD (thread);
2112 if (!was_aborting) {
2113 const char *msg = "Unable to reset abort because no abort was requested";
2114 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2117 thread->abort_exc = NULL;
2118 if (thread->abort_state_handle) {
2119 mono_gchandle_free (thread->abort_state_handle);
2120 /* This is actually not necessary - the handle
2121 only counts if the exception is set */
2122 thread->abort_state_handle = 0;
2127 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2129 LOCK_THREAD (thread);
2131 thread->state &= ~ThreadState_AbortRequested;
2133 if (thread->abort_exc) {
2134 thread->abort_exc = NULL;
2135 if (thread->abort_state_handle) {
2136 mono_gchandle_free (thread->abort_state_handle);
2137 /* This is actually not necessary - the handle
2138 only counts if the exception is set */
2139 thread->abort_state_handle = 0;
2143 UNLOCK_THREAD (thread);
2147 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2149 MonoInternalThread *thread = this_obj->internal_thread;
2150 MonoObject *state, *deserialized = NULL, *exc;
2153 if (!thread->abort_state_handle)
2156 state = mono_gchandle_get_target (thread->abort_state_handle);
2159 domain = mono_domain_get ();
2160 if (mono_object_domain (state) == domain)
2163 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2165 if (!deserialized) {
2166 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2168 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2169 mono_set_pending_exception (invalid_op_exc);
2173 return deserialized;
2177 mono_thread_suspend (MonoInternalThread *thread)
2179 LOCK_THREAD (thread);
2181 if ((thread->state & ThreadState_Unstarted) != 0 ||
2182 (thread->state & ThreadState_Aborted) != 0 ||
2183 (thread->state & ThreadState_Stopped) != 0)
2185 UNLOCK_THREAD (thread);
2189 if ((thread->state & ThreadState_Suspended) != 0 ||
2190 (thread->state & ThreadState_SuspendRequested) != 0 ||
2191 (thread->state & ThreadState_StopRequested) != 0)
2193 UNLOCK_THREAD (thread);
2197 thread->state |= ThreadState_SuspendRequested;
2199 UNLOCK_THREAD (thread);
2201 suspend_thread_internal (thread, FALSE);
2206 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2208 if (!mono_thread_suspend (this_obj->internal_thread)) {
2209 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2214 /* LOCKING: LOCK_THREAD(thread) must be held */
2216 mono_thread_resume (MonoInternalThread *thread)
2218 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2219 thread->state &= ~ThreadState_SuspendRequested;
2223 if ((thread->state & ThreadState_Suspended) == 0 ||
2224 (thread->state & ThreadState_Unstarted) != 0 ||
2225 (thread->state & ThreadState_Aborted) != 0 ||
2226 (thread->state & ThreadState_Stopped) != 0)
2231 UNLOCK_THREAD (thread);
2233 /* Awake the thread */
2234 if (!mono_thread_info_resume (thread_get_tid (thread)))
2237 LOCK_THREAD (thread);
2239 thread->state &= ~ThreadState_Suspended;
2245 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2247 if (!thread->internal_thread) {
2248 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2250 LOCK_THREAD (thread->internal_thread);
2251 if (!mono_thread_resume (thread->internal_thread))
2252 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2253 UNLOCK_THREAD (thread->internal_thread);
2258 mono_threads_is_critical_method (MonoMethod *method)
2260 switch (method->wrapper_type) {
2261 case MONO_WRAPPER_RUNTIME_INVOKE:
2262 case MONO_WRAPPER_XDOMAIN_INVOKE:
2263 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2270 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2275 if (mono_threads_is_critical_method (m)) {
2276 *((gboolean*)data) = TRUE;
2283 is_running_protected_wrapper (void)
2285 gboolean found = FALSE;
2286 mono_stack_walk (find_wrapper, &found);
2290 void mono_thread_internal_stop (MonoInternalThread *thread)
2292 LOCK_THREAD (thread);
2294 if ((thread->state & ThreadState_StopRequested) != 0 ||
2295 (thread->state & ThreadState_Stopped) != 0)
2297 UNLOCK_THREAD (thread);
2301 /* Make sure the thread is awake */
2302 mono_thread_resume (thread);
2304 thread->state |= ThreadState_StopRequested;
2305 thread->state &= ~ThreadState_AbortRequested;
2307 UNLOCK_THREAD (thread);
2309 abort_thread_internal (thread, TRUE, TRUE);
2312 void mono_thread_stop (MonoThread *thread)
2314 mono_thread_internal_stop (thread->internal_thread);
2318 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2321 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2326 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2329 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2334 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2337 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2342 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2345 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2350 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2353 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2354 return (void *) tmp;
2358 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2360 volatile MonoObject *tmp;
2361 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2362 return (MonoObject *) tmp;
2366 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2369 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2374 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2377 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2382 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2384 return InterlockedRead8 ((volatile gint8 *)ptr);
2388 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2390 return InterlockedRead16 ((volatile gint16 *)ptr);
2394 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2396 return InterlockedRead ((volatile gint32 *)ptr);
2400 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2402 #if SIZEOF_VOID_P == 4
2403 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2405 mono_interlocked_lock ();
2406 val = *(gint64*)ptr;
2407 mono_interlocked_unlock ();
2411 return InterlockedRead64 ((volatile gint64 *)ptr);
2415 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2417 return InterlockedReadPointer ((volatile gpointer *)ptr);
2421 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2425 #if SIZEOF_VOID_P == 4
2426 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2428 mono_interlocked_lock ();
2429 val = *(double*)ptr;
2430 mono_interlocked_unlock ();
2435 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2441 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2445 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2451 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2453 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2457 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2459 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2463 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2465 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2469 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2471 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2475 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2477 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2481 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2483 mono_atomic_store_release ((volatile void **) ptr, value);
2487 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2489 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2493 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2495 mono_atomic_store_release ((volatile double *) ptr, value);
2499 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2501 mono_atomic_store_release ((volatile float *) ptr, value);
2505 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2507 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2511 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2513 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2517 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2519 InterlockedWrite ((volatile gint32 *)ptr, value);
2523 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2525 #if SIZEOF_VOID_P == 4
2526 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2527 mono_interlocked_lock ();
2528 *(gint64*)ptr = value;
2529 mono_interlocked_unlock ();
2534 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2538 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2540 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2544 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2548 #if SIZEOF_VOID_P == 4
2549 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2550 mono_interlocked_lock ();
2551 *(double*)ptr = value;
2552 mono_interlocked_unlock ();
2559 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2563 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2569 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2573 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2575 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2579 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2581 mono_threads_lock ();
2583 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2586 contexts = g_hash_table_new (NULL, NULL);
2588 context_adjust_static_data (ctx);
2589 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2590 g_hash_table_insert (contexts, gch, gch);
2592 mono_threads_unlock ();
2594 mono_profiler_context_loaded (ctx);
2598 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2601 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2602 * cleanup in exceptional circumstances, we don't actually do any
2603 * cleanup work here. We instead do this when we iterate the `contexts`
2604 * hash table. The only purpose of this finalizer, at the moment, is to
2605 * notify the profiler.
2608 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2610 mono_profiler_context_unloaded (ctx);
2614 mono_thread_init_tls (void)
2616 MONO_FAST_TLS_INIT (tls_current_object);
2617 mono_native_tls_alloc (¤t_object_key, NULL);
2620 void mono_thread_init (MonoThreadStartCB start_cb,
2621 MonoThreadAttachCB attach_cb)
2623 mono_coop_mutex_init_recursive (&threads_mutex);
2625 mono_os_mutex_init_recursive(&interlocked_mutex);
2626 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2628 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2629 g_assert(background_change_event != NULL);
2631 mono_init_static_data_info (&thread_static_info);
2632 mono_init_static_data_info (&context_static_info);
2634 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2636 mono_thread_start_cb = start_cb;
2637 mono_thread_attach_cb = attach_cb;
2639 /* Get a pseudo handle to the current process. This is just a
2640 * kludge so that wapi can build a process handle if needed.
2641 * As a pseudo handle is returned, we don't need to clean
2644 GetCurrentProcess ();
2647 void mono_thread_cleanup (void)
2649 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2650 MonoThreadInfo *info;
2652 /* The main thread must abandon any held mutexes (particularly
2653 * important for named mutexes as they are shared across
2654 * processes, see bug 74680.) This will happen when the
2655 * thread exits, but if it's not running in a subthread it
2656 * won't exit in time.
2658 info = mono_thread_info_current ();
2659 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2663 /* This stuff needs more testing, it seems one of these
2664 * critical sections can be locked when mono_thread_cleanup is
2667 mono_coop_mutex_destroy (&threads_mutex);
2668 mono_os_mutex_destroy (&interlocked_mutex);
2669 mono_os_mutex_destroy (&delayed_free_table_mutex);
2670 mono_os_mutex_destroy (&small_id_mutex);
2671 CloseHandle (background_change_event);
2674 mono_native_tls_free (current_object_key);
2678 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2680 mono_thread_cleanup_fn = func;
2684 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2686 thread->internal_thread->manage_callback = func;
2689 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2691 mono_thread_notify_pending_exc_fn = func;
2695 static void print_tids (gpointer key, gpointer value, gpointer user)
2697 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2698 * sizeof(uint) and a cast to uint would overflow
2700 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2701 * print this as a pointer.
2703 g_message ("Waiting for: %p", key);
2708 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2709 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2713 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2717 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2719 MONO_PREPARE_BLOCKING;
2720 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2721 MONO_FINISH_BLOCKING;
2723 if(ret==WAIT_FAILED) {
2724 /* See the comment in build_wait_tids() */
2725 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2729 for(i=0; i<wait->num; i++)
2730 CloseHandle (wait->handles[i]);
2732 if (ret == WAIT_TIMEOUT)
2735 for(i=0; i<wait->num; i++) {
2736 gsize tid = wait->threads[i]->tid;
2739 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2740 * it can still run io-layer etc. code. So wait for it to really exit.
2741 * FIXME: This won't join threads which are not in the joinable_hash yet.
2743 mono_thread_join ((gpointer)tid);
2745 mono_threads_lock ();
2746 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2747 /* This thread must have been killed, because
2748 * it hasn't cleaned itself up. (It's just
2749 * possible that the thread exited before the
2750 * parent thread had a chance to store the
2751 * handle, and now there is another pointer to
2752 * the already-exited thread stored. In this
2753 * case, we'll just get two
2754 * mono_profiler_thread_end() calls for the
2758 mono_threads_unlock ();
2759 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2760 thread_cleanup (wait->threads[i]);
2762 mono_threads_unlock ();
2767 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2769 guint32 i, ret, count;
2771 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2773 /* Add the thread state change event, so it wakes up if a thread changes
2774 * to background mode.
2777 if (count < MAXIMUM_WAIT_OBJECTS) {
2778 wait->handles [count] = background_change_event;
2782 MONO_PREPARE_BLOCKING;
2783 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2784 MONO_FINISH_BLOCKING;
2786 if(ret==WAIT_FAILED) {
2787 /* See the comment in build_wait_tids() */
2788 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2792 for(i=0; i<wait->num; i++)
2793 CloseHandle (wait->handles[i]);
2795 if (ret == WAIT_TIMEOUT)
2798 if (ret < wait->num) {
2799 gsize tid = wait->threads[ret]->tid;
2800 mono_threads_lock ();
2801 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2802 /* See comment in wait_for_tids about thread cleanup */
2803 mono_threads_unlock ();
2804 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2805 thread_cleanup (wait->threads [ret]);
2807 mono_threads_unlock ();
2811 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2813 struct wait_data *wait=(struct wait_data *)user;
2815 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2817 MonoInternalThread *thread=(MonoInternalThread *)value;
2819 /* Ignore background threads, we abort them later */
2820 /* Do not lock here since it is not needed and the caller holds threads_lock */
2821 if (thread->state & ThreadState_Background) {
2822 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2823 return; /* just leave, ignore */
2826 if (mono_gc_is_finalizer_internal_thread (thread)) {
2827 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2831 if (thread == mono_thread_internal_current ()) {
2832 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2836 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2837 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2841 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2842 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2846 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2847 if (handle == NULL) {
2848 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2852 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2853 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2854 wait->handles[wait->num]=handle;
2855 wait->threads[wait->num]=thread;
2858 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2860 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2865 /* Just ignore the rest, we can't do anything with
2872 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2874 struct wait_data *wait=(struct wait_data *)user;
2875 MonoNativeThreadId self = mono_native_thread_id_get ();
2876 MonoInternalThread *thread = (MonoInternalThread *)value;
2879 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2882 /* The finalizer thread is not a background thread */
2883 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
2884 && (thread->state & ThreadState_Background) != 0
2885 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
2887 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2891 /* printf ("A: %d\n", wait->num); */
2892 wait->handles[wait->num]=thread->handle;
2893 wait->threads[wait->num]=thread;
2896 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2897 mono_thread_internal_stop (thread);
2901 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
2902 && !mono_gc_is_finalizer_internal_thread (thread);
2906 * mono_threads_set_shutting_down:
2908 * Is called by a thread that wants to shut down Mono. If the runtime is already
2909 * shutting down, the calling thread is suspended/stopped, and this function never
2913 mono_threads_set_shutting_down (void)
2915 MonoInternalThread *current_thread = mono_thread_internal_current ();
2917 mono_threads_lock ();
2919 if (shutting_down) {
2920 mono_threads_unlock ();
2922 /* Make sure we're properly suspended/stopped */
2924 LOCK_THREAD (current_thread);
2926 if ((current_thread->state & ThreadState_SuspendRequested) ||
2927 (current_thread->state & ThreadState_AbortRequested) ||
2928 (current_thread->state & ThreadState_StopRequested)) {
2929 UNLOCK_THREAD (current_thread);
2930 mono_thread_execute_interruption ();
2932 current_thread->state |= ThreadState_Stopped;
2933 UNLOCK_THREAD (current_thread);
2936 /*since we're killing the thread, unset the current domain.*/
2937 mono_domain_unset ();
2939 /* Wake up other threads potentially waiting for us */
2940 mono_thread_info_exit ();
2942 shutting_down = TRUE;
2944 /* Not really a background state change, but this will
2945 * interrupt the main thread if it is waiting for all
2946 * the other threads.
2948 SetEvent (background_change_event);
2950 mono_threads_unlock ();
2954 void mono_thread_manage (void)
2956 struct wait_data wait_data;
2957 struct wait_data *wait = &wait_data;
2959 memset (wait, 0, sizeof (struct wait_data));
2960 /* join each thread that's still running */
2961 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2963 mono_threads_lock ();
2965 THREAD_DEBUG (g_message("%s: No threads", __func__));
2966 mono_threads_unlock ();
2969 mono_threads_unlock ();
2972 mono_threads_lock ();
2973 if (shutting_down) {
2974 /* somebody else is shutting down */
2975 mono_threads_unlock ();
2978 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2979 mono_g_hash_table_foreach (threads, print_tids, NULL));
2981 ResetEvent (background_change_event);
2983 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2984 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2985 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2986 mono_threads_unlock ();
2988 /* Something to wait for */
2989 wait_for_tids_or_state_change (wait, INFINITE);
2991 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2992 } while(wait->num>0);
2994 /* Mono is shutting down, so just wait for the end */
2995 if (!mono_runtime_try_shutdown ()) {
2996 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2997 mono_thread_suspend (mono_thread_internal_current ());
2998 mono_thread_execute_interruption ();
3002 * Remove everything but the finalizer thread and self.
3003 * Also abort all the background threads
3006 mono_threads_lock ();
3009 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3010 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3011 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3013 mono_threads_unlock ();
3015 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3017 /* Something to wait for */
3018 wait_for_tids (wait, INFINITE);
3020 } while (wait->num > 0);
3023 * give the subthreads a chance to really quit (this is mainly needed
3024 * to get correct user and system times from getrusage/wait/time(1)).
3025 * This could be removed if we avoid pthread_detach() and use pthread_join().
3027 mono_thread_info_yield ();
3031 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3033 MonoInternalThread *thread = (MonoInternalThread*)value;
3034 struct wait_data *wait = (struct wait_data*)user_data;
3038 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3040 * This needs no locking.
3042 if ((thread->state & ThreadState_Suspended) != 0 ||
3043 (thread->state & ThreadState_Stopped) != 0)
3046 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3047 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3051 wait->handles [wait->num] = handle;
3052 wait->threads [wait->num] = thread;
3058 * mono_thread_suspend_all_other_threads:
3060 * Suspend all managed threads except the finalizer thread and this thread. It is
3061 * not possible to resume them later.
3063 void mono_thread_suspend_all_other_threads (void)
3065 struct wait_data wait_data;
3066 struct wait_data *wait = &wait_data;
3068 MonoNativeThreadId self = mono_native_thread_id_get ();
3069 guint32 eventidx = 0;
3070 gboolean starting, finished;
3072 memset (wait, 0, sizeof (struct wait_data));
3074 * The other threads could be in an arbitrary state at this point, i.e.
3075 * they could be starting up, shutting down etc. This means that there could be
3076 * threads which are not even in the threads hash table yet.
3080 * First we set a barrier which will be checked by all threads before they
3081 * are added to the threads hash table, and they will exit if the flag is set.
3082 * This ensures that no threads could be added to the hash later.
3083 * We will use shutting_down as the barrier for now.
3085 g_assert (shutting_down);
3088 * We make multiple calls to WaitForMultipleObjects since:
3089 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3090 * - some threads could exit without becoming suspended
3095 * Make a copy of the hashtable since we can't do anything with
3096 * threads while threads_mutex is held.
3099 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3100 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3101 mono_threads_lock ();
3102 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3103 mono_threads_unlock ();
3106 /* Get the suspended events that we'll be waiting for */
3107 for (i = 0; i < wait->num; ++i) {
3108 MonoInternalThread *thread = wait->threads [i];
3110 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3111 || mono_gc_is_finalizer_internal_thread (thread)
3112 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3114 //CloseHandle (wait->handles [i]);
3115 wait->threads [i] = NULL; /* ignore this thread in next loop */
3119 LOCK_THREAD (thread);
3121 if ((thread->state & ThreadState_Suspended) != 0 ||
3122 (thread->state & ThreadState_StopRequested) != 0 ||
3123 (thread->state & ThreadState_Stopped) != 0) {
3124 UNLOCK_THREAD (thread);
3125 CloseHandle (wait->handles [i]);
3126 wait->threads [i] = NULL; /* ignore this thread in next loop */
3132 /* Convert abort requests into suspend requests */
3133 if ((thread->state & ThreadState_AbortRequested) != 0)
3134 thread->state &= ~ThreadState_AbortRequested;
3136 thread->state |= ThreadState_SuspendRequested;
3138 UNLOCK_THREAD (thread);
3140 /* Signal the thread to suspend */
3141 suspend_thread_internal (thread, TRUE);
3143 if (eventidx <= 0) {
3145 * If there are threads which are starting up, we wait until they
3146 * are suspended when they try to register in the threads hash.
3147 * This is guaranteed to finish, since the threads which can create new
3148 * threads get suspended after a while.
3149 * FIXME: The finalizer thread can still create new threads.
3151 mono_threads_lock ();
3152 if (threads_starting_up)
3153 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3156 mono_threads_unlock ();
3158 mono_thread_info_sleep (100, NULL);
3166 MonoInternalThread *thread;
3167 MonoStackFrameInfo *frames;
3168 int nframes, max_frames;
3169 int nthreads, max_threads;
3170 MonoInternalThread **threads;
3171 } ThreadDumpUserData;
3173 static gboolean thread_dump_requested;
3175 /* This needs to be async safe */
3177 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3179 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3181 if (ud->nframes < ud->max_frames) {
3182 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3189 /* This needs to be async safe */
3190 static SuspendThreadResult
3191 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3193 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3194 MonoInternalThread *thread = user_data->thread;
3197 /* This no longer works with remote unwinding */
3199 wapi_desc = wapi_current_thread_desc ();
3200 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3205 if (thread == mono_thread_internal_current ())
3206 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3208 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3210 return MonoResumeThread;
3214 int nthreads, max_threads;
3215 MonoInternalThread **threads;
3216 } CollectThreadsUserData;
3219 collect_thread (gpointer key, gpointer value, gpointer user)
3221 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3222 MonoInternalThread *thread = (MonoInternalThread *)value;
3224 if (ud->nthreads < ud->max_threads)
3225 ud->threads [ud->nthreads ++] = thread;
3229 * Collect running threads into the THREADS array.
3230 * THREADS should be an array allocated on the stack.
3233 collect_threads (MonoInternalThread **thread_array, int max_threads)
3235 CollectThreadsUserData ud;
3237 memset (&ud, 0, sizeof (ud));
3238 /* This array contains refs, but its on the stack, so its ok */
3239 ud.threads = thread_array;
3240 ud.max_threads = max_threads;
3242 mono_threads_lock ();
3243 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3244 mono_threads_unlock ();
3250 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3252 GString* text = g_string_new (0);
3254 GError *error = NULL;
3257 ud->thread = thread;
3260 /* Collect frames for the thread */
3261 if (thread == mono_thread_internal_current ()) {
3262 get_thread_dump (mono_thread_info_current (), ud);
3264 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3268 * Do all the non async-safe work outside of get_thread_dump.
3271 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3273 g_string_append_printf (text, "\n\"%s\"", name);
3276 else if (thread->threadpool_thread) {
3277 g_string_append (text, "\n\"<threadpool thread>\"");
3279 g_string_append (text, "\n\"<unnamed thread>\"");
3282 for (i = 0; i < ud->nframes; ++i) {
3283 MonoStackFrameInfo *frame = &ud->frames [i];
3284 MonoMethod *method = NULL;
3286 if (frame->type == FRAME_TYPE_MANAGED)
3287 method = mono_jit_info_get_method (frame->ji);
3290 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3291 g_string_append_printf (text, " %s\n", location);
3294 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3298 fprintf (stdout, "%s", text->str);
3300 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3301 OutputDebugStringA(text->str);
3304 g_string_free (text, TRUE);
3309 mono_threads_perform_thread_dump (void)
3311 ThreadDumpUserData ud;
3312 MonoInternalThread *thread_array [128];
3313 int tindex, nthreads;
3315 if (!thread_dump_requested)
3318 printf ("Full thread dump:\n");
3320 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3321 nthreads = collect_threads (thread_array, 128);
3323 memset (&ud, 0, sizeof (ud));
3324 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3325 ud.max_frames = 256;
3327 for (tindex = 0; tindex < nthreads; ++tindex)
3328 dump_thread (thread_array [tindex], &ud);
3332 thread_dump_requested = FALSE;
3335 /* Obtain the thread dump of all threads */
3337 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3339 ThreadDumpUserData ud;
3340 MonoInternalThread *thread_array [128];
3341 MonoDomain *domain = mono_domain_get ();
3342 MonoDebugSourceLocation *location;
3343 int tindex, nthreads;
3345 *out_threads = NULL;
3346 *out_stack_frames = NULL;
3348 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3349 nthreads = collect_threads (thread_array, 128);
3351 memset (&ud, 0, sizeof (ud));
3352 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3353 ud.max_frames = 256;
3355 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3356 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3358 for (tindex = 0; tindex < nthreads; ++tindex) {
3359 MonoInternalThread *thread = thread_array [tindex];
3360 MonoArray *thread_frames;
3366 /* Collect frames for the thread */
3367 if (thread == mono_thread_internal_current ()) {
3368 get_thread_dump (mono_thread_info_current (), &ud);
3370 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3373 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3375 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3376 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3378 for (i = 0; i < ud.nframes; ++i) {
3379 MonoStackFrameInfo *frame = &ud.frames [i];
3380 MonoMethod *method = NULL;
3381 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
3383 sf->native_offset = frame->native_offset;
3385 if (frame->type == FRAME_TYPE_MANAGED)
3386 method = mono_jit_info_get_method (frame->ji);
3389 sf->method_address = (gsize) frame->ji->code_start;
3391 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3393 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3395 sf->il_offset = location->il_offset;
3397 if (location && location->source_file) {
3398 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3399 sf->line = location->row;
3400 sf->column = location->column;
3402 mono_debug_free_source_location (location);
3407 mono_array_setref (thread_frames, i, sf);
3415 * mono_threads_request_thread_dump:
3417 * Ask all threads except the current to print their stacktrace to stdout.
3420 mono_threads_request_thread_dump (void)
3422 /*The new thread dump code runs out of the finalizer thread. */
3423 thread_dump_requested = TRUE;
3424 mono_gc_finalize_notify ();
3429 gint allocated; /* +1 so that refs [allocated] == NULL */
3433 typedef struct ref_stack RefStack;
3436 ref_stack_new (gint initial_size)
3440 initial_size = MAX (initial_size, 16) + 1;
3441 rs = g_new0 (RefStack, 1);
3442 rs->refs = g_new0 (gpointer, initial_size);
3443 rs->allocated = initial_size;
3448 ref_stack_destroy (gpointer ptr)
3450 RefStack *rs = (RefStack *)ptr;
3459 ref_stack_push (RefStack *rs, gpointer ptr)
3461 g_assert (rs != NULL);
3463 if (rs->bottom >= rs->allocated) {
3464 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3465 rs->allocated <<= 1;
3466 rs->refs [rs->allocated] = NULL;
3468 rs->refs [rs->bottom++] = ptr;
3472 ref_stack_pop (RefStack *rs)
3474 if (rs == NULL || rs->bottom == 0)
3478 rs->refs [rs->bottom] = NULL;
3482 ref_stack_find (RefStack *rs, gpointer ptr)
3489 for (refs = rs->refs; refs && *refs; refs++) {
3497 * mono_thread_push_appdomain_ref:
3499 * Register that the current thread may have references to objects in domain
3500 * @domain on its stack. Each call to this function should be paired with a
3501 * call to pop_appdomain_ref.
3504 mono_thread_push_appdomain_ref (MonoDomain *domain)
3506 MonoInternalThread *thread = mono_thread_internal_current ();
3509 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3510 SPIN_LOCK (thread->lock_thread_id);
3511 if (thread->appdomain_refs == NULL)
3512 thread->appdomain_refs = ref_stack_new (16);
3513 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3514 SPIN_UNLOCK (thread->lock_thread_id);
3519 mono_thread_pop_appdomain_ref (void)
3521 MonoInternalThread *thread = mono_thread_internal_current ();
3524 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3525 SPIN_LOCK (thread->lock_thread_id);
3526 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3527 SPIN_UNLOCK (thread->lock_thread_id);
3532 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3535 SPIN_LOCK (thread->lock_thread_id);
3536 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3537 SPIN_UNLOCK (thread->lock_thread_id);
3542 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3544 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3547 typedef struct abort_appdomain_data {
3548 struct wait_data wait;
3550 } abort_appdomain_data;
3553 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3555 MonoInternalThread *thread = (MonoInternalThread*)value;
3556 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3557 MonoDomain *domain = data->domain;
3559 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3560 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3562 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3563 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3566 data->wait.handles [data->wait.num] = handle;
3567 data->wait.threads [data->wait.num] = thread;
3570 /* Just ignore the rest, we can't do anything with
3578 * mono_threads_abort_appdomain_threads:
3580 * Abort threads which has references to the given appdomain.
3583 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3585 #ifdef __native_client__
3589 abort_appdomain_data user_data;
3591 int orig_timeout = timeout;
3594 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3596 start_time = mono_msec_ticks ();
3598 mono_threads_lock ();
3600 user_data.domain = domain;
3601 user_data.wait.num = 0;
3602 /* This shouldn't take any locks */
3603 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3604 mono_threads_unlock ();
3606 if (user_data.wait.num > 0) {
3607 /* Abort the threads outside the threads lock */
3608 for (i = 0; i < user_data.wait.num; ++i)
3609 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3612 * We should wait for the threads either to abort, or to leave the
3613 * domain. We can't do the latter, so we wait with a timeout.
3615 wait_for_tids (&user_data.wait, 100);
3618 /* Update remaining time */
3619 timeout -= mono_msec_ticks () - start_time;
3620 start_time = mono_msec_ticks ();
3622 if (orig_timeout != -1 && timeout < 0)
3625 while (user_data.wait.num > 0);
3627 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3633 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3635 MonoInternalThread *thread = (MonoInternalThread*)value;
3636 MonoDomain *domain = (MonoDomain*)user_data;
3639 /* No locking needed here */
3640 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3642 if (thread->cached_culture_info) {
3643 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3644 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3645 if (obj && obj->vtable->domain == domain)
3646 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3652 * mono_threads_clear_cached_culture:
3654 * Clear the cached_current_culture from all threads if it is in the
3658 mono_threads_clear_cached_culture (MonoDomain *domain)
3660 mono_threads_lock ();
3661 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3662 mono_threads_unlock ();
3666 * mono_thread_get_undeniable_exception:
3668 * Return an exception which needs to be raised when leaving a catch clause.
3669 * This is used for undeniable exception propagation.
3672 mono_thread_get_undeniable_exception (void)
3674 MonoInternalThread *thread = mono_thread_internal_current ();
3676 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3678 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3679 * exception if the thread no longer references a dying appdomain.
3681 thread->abort_exc->trace_ips = NULL;
3682 thread->abort_exc->stack_trace = NULL;
3683 return thread->abort_exc;
3689 #if MONO_SMALL_CONFIG
3690 #define NUM_STATIC_DATA_IDX 4
3691 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3695 #define NUM_STATIC_DATA_IDX 8
3696 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3697 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3701 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3702 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3705 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3707 gpointer *static_data = (gpointer *)addr;
3709 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3710 void **ptr = (void **)static_data [i];
3715 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3716 void **p = ptr + idx;
3719 mark_func ((MonoObject**)p, gc_data);
3725 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3727 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3731 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3733 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3737 * mono_alloc_static_data
3739 * Allocate memory blocks for storing threads or context static data
3742 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3744 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3747 gpointer* static_data = *static_data_ptr;
3749 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3750 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3752 if (mono_gc_user_markers_supported ()) {
3753 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3754 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3756 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3757 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3760 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3761 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3762 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3763 *static_data_ptr = static_data;
3764 static_data [0] = static_data;
3767 for (i = 1; i <= idx; ++i) {
3768 if (static_data [i])
3771 if (mono_gc_user_markers_supported ())
3772 static_data [i] = g_malloc0 (static_data_size [i]);
3774 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3775 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3776 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3781 mono_free_static_data (gpointer* static_data)
3784 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3785 gpointer p = static_data [i];
3789 * At this point, the static data pointer array is still registered with the
3790 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3791 * data. Freeing the individual arrays without first nulling their slots
3792 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3793 * such an already freed array. See bug #13813.
3795 static_data [i] = NULL;
3796 mono_memory_write_barrier ();
3797 if (mono_gc_user_markers_supported ())
3800 mono_gc_free_fixed (p);
3802 mono_gc_free_fixed (static_data);
3806 * mono_init_static_data_info
3808 * Initializes static data counters
3810 static void mono_init_static_data_info (StaticDataInfo *static_data)
3812 static_data->idx = 0;
3813 static_data->offset = 0;
3814 static_data->freelist = NULL;
3818 * mono_alloc_static_data_slot
3820 * Generates an offset for static data. static_data contains the counters
3821 * used to generate it.
3824 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3826 if (!static_data->idx && !static_data->offset) {
3828 * we use the first chunk of the first allocation also as
3829 * an array for the rest of the data
3831 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3833 static_data->offset += align - 1;
3834 static_data->offset &= ~(align - 1);
3835 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3836 static_data->idx ++;
3837 g_assert (size <= static_data_size [static_data->idx]);
3838 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3839 static_data->offset = 0;
3841 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
3842 static_data->offset += size;
3847 * ensure thread static fields already allocated are valid for thread
3848 * This function is called when a thread is created or on thread attach.
3851 thread_adjust_static_data (MonoInternalThread *thread)
3853 mono_threads_lock ();
3854 if (thread_static_info.offset || thread_static_info.idx > 0) {
3855 /* get the current allocated size */
3856 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
3857 mono_alloc_static_data (&thread->static_data, offset, TRUE);
3859 mono_threads_unlock ();
3863 * LOCKING: requires that threads_mutex is held
3866 context_adjust_static_data (MonoAppContext *ctx)
3868 if (context_static_info.offset || context_static_info.idx > 0) {
3869 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
3870 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3875 * LOCKING: requires that threads_mutex is held
3878 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3880 MonoInternalThread *thread = (MonoInternalThread *)value;
3881 guint32 offset = GPOINTER_TO_UINT (user);
3883 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3887 * LOCKING: requires that threads_mutex is held
3890 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
3892 uint32_t gch = GPOINTER_TO_INT (key);
3893 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (gch);
3896 mono_gchandle_free (gch);
3897 return TRUE; // Remove this key/value pair
3900 guint32 offset = GPOINTER_TO_UINT (user);
3901 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3903 return FALSE; // Don't remove it
3906 static StaticDataFreeList*
3907 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3909 StaticDataFreeList* prev = NULL;
3910 StaticDataFreeList* tmp = static_data->freelist;
3912 if (tmp->size == size) {
3914 prev->next = tmp->next;
3916 static_data->freelist = tmp->next;
3925 #if SIZEOF_VOID_P == 4
3932 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
3934 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3936 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
3937 MonoBitSet *rb = sets [idx];
3938 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3939 offset /= sizeof (uintptr_t);
3940 /* offset is now the bitmap offset */
3941 for (int i = 0; i < numbits; ++i) {
3942 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3943 mono_bitset_set_fast (rb, offset + i);
3948 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
3950 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3951 MonoBitSet *rb = sets [idx];
3952 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3953 offset /= sizeof (uintptr_t);
3954 /* offset is now the bitmap offset */
3955 for (int i = 0; i < size / sizeof (uintptr_t); i++)
3956 mono_bitset_clear_fast (rb, offset + i);
3960 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3962 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
3964 StaticDataInfo *info;
3967 if (static_type == SPECIAL_STATIC_THREAD) {
3968 info = &thread_static_info;
3969 sets = thread_reference_bitmaps;
3971 info = &context_static_info;
3972 sets = context_reference_bitmaps;
3975 mono_threads_lock ();
3977 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
3981 offset = item->offset;
3984 offset = mono_alloc_static_data_slot (info, size, align);
3987 update_reference_bitmap (sets, offset, bitmap, numbits);
3989 if (static_type == SPECIAL_STATIC_THREAD) {
3990 /* This can be called during startup */
3991 if (threads != NULL)
3992 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3994 if (contexts != NULL)
3995 g_hash_table_foreach_remove (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
3997 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4000 mono_threads_unlock ();
4006 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4008 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4010 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4011 return get_thread_static_data (thread, offset);
4013 return get_context_static_data (thread->current_appcontext, offset);
4018 mono_get_special_static_data (guint32 offset)
4020 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4029 * LOCKING: requires that threads_mutex is held
4032 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4034 MonoInternalThread *thread = (MonoInternalThread *)value;
4035 OffsetSize *data = (OffsetSize *)user;
4036 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4037 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4040 if (!thread->static_data || !thread->static_data [idx])
4042 ptr = ((char*) thread->static_data [idx]) + off;
4043 mono_gc_bzero_atomic (ptr, data->size);
4047 * LOCKING: requires that threads_mutex is held
4050 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4052 uint32_t gch = GPOINTER_TO_INT (key);
4053 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (gch);
4056 mono_gchandle_free (gch);
4057 return TRUE; // Remove this key/value pair
4060 OffsetSize *data = (OffsetSize *)user;
4061 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4062 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4065 if (!ctx->static_data || !ctx->static_data [idx])
4066 return FALSE; // Don't remove this key/value pair
4068 ptr = ((char*) ctx->static_data [idx]) + off;
4069 mono_gc_bzero_atomic (ptr, data->size);
4071 return FALSE; // Don't remove this key/value pair
4075 do_free_special_slot (guint32 offset, guint32 size)
4077 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4079 StaticDataInfo *info;
4081 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4082 info = &thread_static_info;
4083 sets = thread_reference_bitmaps;
4085 info = &context_static_info;
4086 sets = context_reference_bitmaps;
4089 guint32 data_offset = offset;
4090 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4091 OffsetSize data = { data_offset, size };
4093 clear_reference_bitmap (sets, data.offset, data.size);
4095 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4096 if (threads != NULL)
4097 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4099 if (contexts != NULL)
4100 g_hash_table_foreach_remove (contexts, free_context_static_data_helper, &data);
4103 if (!mono_runtime_is_shutting_down ()) {
4104 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4106 item->offset = offset;
4109 item->next = info->freelist;
4110 info->freelist = item;
4115 do_free_special (gpointer key, gpointer value, gpointer data)
4117 MonoClassField *field = (MonoClassField *)key;
4118 guint32 offset = GPOINTER_TO_UINT (value);
4121 size = mono_type_size (field->type, &align);
4122 do_free_special_slot (offset, size);
4126 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4128 mono_threads_lock ();
4130 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4132 mono_threads_unlock ();
4136 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4138 /* Only ever called for ThreadLocal instances */
4139 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4141 mono_threads_lock ();
4142 do_free_special_slot (offset, size);
4143 mono_threads_unlock ();
4147 static void CALLBACK dummy_apc (ULONG_PTR param)
4153 * mono_thread_execute_interruption
4155 * Performs the operation that the requested thread state requires (abort,
4158 static MonoException*
4159 mono_thread_execute_interruption (void)
4161 MonoInternalThread *thread = mono_thread_internal_current ();
4163 LOCK_THREAD (thread);
4165 /* MonoThread::interruption_requested can only be changed with atomics */
4166 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4167 /* this will consume pending APC calls */
4169 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4171 InterlockedDecrement (&thread_interruption_requested);
4173 /* Clear the interrupted flag of the thread so it can wait again */
4174 mono_thread_info_clear_self_interrupt ();
4177 if ((thread->state & ThreadState_AbortRequested) != 0) {
4178 UNLOCK_THREAD (thread);
4179 if (thread->abort_exc == NULL) {
4181 * This might be racy, but it has to be called outside the lock
4182 * since it calls managed code.
4184 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4186 return thread->abort_exc;
4188 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4189 self_suspend_internal (thread);
4192 else if ((thread->state & ThreadState_StopRequested) != 0) {
4193 /* FIXME: do this through the JIT? */
4195 UNLOCK_THREAD (thread);
4197 mono_thread_exit ();
4199 } else if (thread->pending_exception) {
4202 exc = thread->pending_exception;
4203 thread->pending_exception = NULL;
4205 UNLOCK_THREAD (thread);
4207 } else if (thread->thread_interrupt_requested) {
4209 thread->thread_interrupt_requested = FALSE;
4210 UNLOCK_THREAD (thread);
4212 return(mono_get_exception_thread_interrupted ());
4215 UNLOCK_THREAD (thread);
4221 * mono_thread_request_interruption
4223 * A signal handler can call this method to request the interruption of a
4224 * thread. The result of the interruption will depend on the current state of
4225 * the thread. If the result is an exception that needs to be throw, it is
4226 * provided as return value.
4229 mono_thread_request_interruption (gboolean running_managed)
4231 MonoInternalThread *thread = mono_thread_internal_current ();
4233 /* The thread may already be stopping */
4238 if (thread->interrupt_on_stop &&
4239 thread->state & ThreadState_StopRequested &&
4240 thread->state & ThreadState_Background)
4244 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4246 InterlockedIncrement (&thread_interruption_requested);
4248 if (!running_managed || is_running_protected_wrapper ()) {
4249 /* Can't stop while in unmanaged code. Increase the global interruption
4250 request count. When exiting the unmanaged method the count will be
4251 checked and the thread will be interrupted. */
4253 if (mono_thread_notify_pending_exc_fn && !running_managed)
4254 /* The JIT will notify the thread about the interruption */
4255 /* This shouldn't take any locks */
4256 mono_thread_notify_pending_exc_fn (NULL);
4258 /* this will awake the thread if it is in WaitForSingleObject
4260 /* Our implementation of this function ignores the func argument */
4262 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4264 mono_thread_info_self_interrupt ();
4269 return mono_thread_execute_interruption ();
4273 /*This function should be called by a thread after it has exited all of
4274 * its handle blocks at interruption time.*/
4276 mono_thread_resume_interruption (void)
4278 MonoInternalThread *thread = mono_thread_internal_current ();
4279 gboolean still_aborting;
4281 /* The thread may already be stopping */
4285 LOCK_THREAD (thread);
4286 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4287 UNLOCK_THREAD (thread);
4289 /*This can happen if the protected block called Thread::ResetAbort*/
4290 if (!still_aborting)
4293 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4295 InterlockedIncrement (&thread_interruption_requested);
4297 mono_thread_info_self_interrupt ();
4299 return mono_thread_execute_interruption ();
4302 gboolean mono_thread_interruption_requested ()
4304 if (thread_interruption_requested) {
4305 MonoInternalThread *thread = mono_thread_internal_current ();
4306 /* The thread may already be stopping */
4308 return (thread->interruption_requested);
4313 static MonoException*
4314 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4316 MonoInternalThread *thread = mono_thread_internal_current ();
4318 /* The thread may already be stopping */
4322 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4323 MonoException* exc = mono_thread_execute_interruption ();
4331 * Performs the interruption of the current thread, if one has been requested,
4332 * and the thread is not running a protected wrapper.
4333 * Return the exception which needs to be thrown, if any.
4336 mono_thread_interruption_checkpoint (void)
4338 return mono_thread_interruption_checkpoint_request (FALSE);
4342 * Performs the interruption of the current thread, if one has been requested.
4343 * Return the exception which needs to be thrown, if any.
4346 mono_thread_force_interruption_checkpoint_noraise (void)
4348 return mono_thread_interruption_checkpoint_request (TRUE);
4352 * Performs the interruption of the current thread, if one has been requested.
4353 * Throw the exception which needs to be thrown, if any.
4356 mono_thread_force_interruption_checkpoint (void)
4360 ex = mono_thread_interruption_checkpoint_request (TRUE);
4362 mono_raise_exception (ex);
4366 * mono_thread_get_and_clear_pending_exception:
4368 * Return any pending exceptions for the current thread and clear it as a side effect.
4371 mono_thread_get_and_clear_pending_exception (void)
4373 MonoInternalThread *thread = mono_thread_internal_current ();
4375 /* The thread may already be stopping */
4379 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4380 return mono_thread_execute_interruption ();
4383 if (thread->pending_exception) {
4384 MonoException *exc = thread->pending_exception;
4386 thread->pending_exception = NULL;
4394 * mono_set_pending_exception:
4396 * Set the pending exception of the current thread to EXC.
4397 * The exception will be thrown when execution returns to managed code.
4400 mono_set_pending_exception (MonoException *exc)
4402 MonoInternalThread *thread = mono_thread_internal_current ();
4404 /* The thread may already be stopping */
4408 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4410 mono_thread_request_interruption (FALSE);
4414 * mono_thread_interruption_request_flag:
4416 * Returns the address of a flag that will be non-zero if an interruption has
4417 * been requested for a thread. The thread to interrupt may not be the current
4418 * thread, so an additional call to mono_thread_interruption_requested() or
4419 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4422 gint32* mono_thread_interruption_request_flag ()
4424 return &thread_interruption_requested;
4428 mono_thread_init_apartment_state (void)
4431 MonoInternalThread* thread = mono_thread_internal_current ();
4433 /* Positive return value indicates success, either
4434 * S_OK if this is first CoInitialize call, or
4435 * S_FALSE if CoInitialize already called, but with same
4436 * threading model. A negative value indicates failure,
4437 * probably due to trying to change the threading model.
4439 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4440 ? COINIT_APARTMENTTHREADED
4441 : COINIT_MULTITHREADED) < 0) {
4442 thread->apartment_state = ThreadApartmentState_Unknown;
4448 mono_thread_cleanup_apartment_state (void)
4451 MonoInternalThread* thread = mono_thread_internal_current ();
4453 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4460 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4462 LOCK_THREAD (thread);
4463 thread->state |= state;
4464 UNLOCK_THREAD (thread);
4468 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4470 LOCK_THREAD (thread);
4471 thread->state &= ~state;
4472 UNLOCK_THREAD (thread);
4476 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4478 gboolean ret = FALSE;
4480 LOCK_THREAD (thread);
4482 if ((thread->state & test) != 0) {
4486 UNLOCK_THREAD (thread);
4491 static gboolean has_tls_get = FALSE;
4494 mono_runtime_set_has_tls_get (gboolean val)
4500 mono_runtime_has_tls_get (void)
4506 self_interrupt_thread (void *_unused)
4508 MonoThreadInfo *info = mono_thread_info_current ();
4509 MonoException *exc = mono_thread_execute_interruption ();
4510 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4511 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. */
4512 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4516 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4520 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4524 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4526 MonoJitInfo **dest = (MonoJitInfo **)data;
4532 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4534 MonoJitInfo *ji = NULL;
4537 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4542 MonoInternalThread *thread;
4543 gboolean install_async_abort;
4544 MonoThreadInfoInterruptToken *interrupt_token;
4547 static SuspendThreadResult
4548 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4550 AbortThreadData *data = (AbortThreadData *)ud;
4551 MonoInternalThread *thread = data->thread;
4552 MonoJitInfo *ji = NULL;
4553 gboolean protected_wrapper;
4554 gboolean running_managed;
4556 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4557 return MonoResumeThread;
4559 /*someone is already interrupting it*/
4560 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4561 return MonoResumeThread;
4563 InterlockedIncrement (&thread_interruption_requested);
4565 ji = mono_thread_info_get_last_managed (info);
4566 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4567 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4569 if (!protected_wrapper && running_managed) {
4570 /*We are in managed code*/
4571 /*Set the thread to call */
4572 if (data->install_async_abort)
4573 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4574 return MonoResumeThread;
4576 if (mono_thread_notify_pending_exc_fn)
4577 /* The JIT will notify the thread about the interruption */
4578 mono_thread_notify_pending_exc_fn (info);
4581 * This will cause waits to be broken.
4582 * It will also prevent the thread from entering a wait, so if the thread returns
4583 * from the wait before it receives the abort signal, it will just spin in the wait
4584 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4587 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4589 return MonoResumeThread;
4594 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4596 AbortThreadData data = { 0 };
4597 data.thread = thread;
4598 data.install_async_abort = install_async_abort;
4601 FIXME this is insanely broken, it doesn't cause interruption to happen
4602 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4604 if (thread == mono_thread_internal_current ()) {
4605 /* Do it synchronously */
4606 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4608 mono_raise_exception (exc);
4610 mono_thread_info_self_interrupt ();
4615 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4616 if (data.interrupt_token)
4617 mono_thread_info_finish_interrupt (data.interrupt_token);
4618 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4622 MonoInternalThread *thread;
4624 MonoThreadInfoInterruptToken *interrupt_token;
4625 } SuspendThreadData;
4627 static SuspendThreadResult
4628 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4630 SuspendThreadData *data = (SuspendThreadData *)ud;
4631 MonoInternalThread *thread = data->thread;
4632 MonoJitInfo *ji = NULL;
4633 gboolean protected_wrapper;
4634 gboolean running_managed;
4636 ji = mono_thread_info_get_last_managed (info);
4637 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4638 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4640 if (running_managed && !protected_wrapper) {
4641 thread->state &= ~ThreadState_SuspendRequested;
4642 thread->state |= ThreadState_Suspended;
4643 return KeepSuspended;
4645 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4646 InterlockedIncrement (&thread_interruption_requested);
4647 if (data->interrupt)
4648 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4650 if (mono_thread_notify_pending_exc_fn && !running_managed)
4651 /* The JIT will notify the thread about the interruption */
4652 mono_thread_notify_pending_exc_fn (info);
4653 return MonoResumeThread;
4658 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4660 LOCK_THREAD (thread);
4661 if (thread == mono_thread_internal_current ()) {
4662 mono_thread_info_begin_self_suspend ();
4663 //XXX replace this with better named functions
4664 thread->state &= ~ThreadState_SuspendRequested;
4665 thread->state |= ThreadState_Suspended;
4666 UNLOCK_THREAD (thread);
4667 mono_thread_info_end_self_suspend ();
4669 SuspendThreadData data = { 0 };
4670 data.thread = thread;
4671 data.interrupt = interrupt;
4673 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4674 if (data.interrupt_token)
4675 mono_thread_info_finish_interrupt (data.interrupt_token);
4676 UNLOCK_THREAD (thread);
4680 /*This is called with @thread synch_cs held and it must release it*/
4682 self_suspend_internal (MonoInternalThread *thread)
4684 mono_thread_info_begin_self_suspend ();
4685 thread->state &= ~ThreadState_SuspendRequested;
4686 thread->state |= ThreadState_Suspended;
4687 UNLOCK_THREAD (thread);
4688 mono_thread_info_end_self_suspend ();
4693 * mono_thread_is_foreign:
4694 * @thread: the thread to query
4696 * This function allows one to determine if a thread was created by the mono runtime and has
4697 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4699 * Returns: true if @thread was not created by the runtime.
4702 mono_thread_is_foreign (MonoThread *thread)
4704 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4705 return info->runtime_thread == FALSE;
4709 * mono_add_joinable_thread:
4711 * Add TID to the list of joinable threads.
4712 * LOCKING: Acquires the threads lock.
4715 mono_threads_add_joinable_thread (gpointer tid)
4719 * We cannot detach from threads because it causes problems like
4720 * 2fd16f60/r114307. So we collect them and join them when
4721 * we have time (in he finalizer thread).
4723 joinable_threads_lock ();
4724 if (!joinable_threads)
4725 joinable_threads = g_hash_table_new (NULL, NULL);
4726 g_hash_table_insert (joinable_threads, tid, tid);
4727 joinable_thread_count ++;
4728 joinable_threads_unlock ();
4730 mono_gc_finalize_notify ();
4735 * mono_threads_join_threads:
4737 * Join all joinable threads. This is called from the finalizer thread.
4738 * LOCKING: Acquires the threads lock.
4741 mono_threads_join_threads (void)
4744 GHashTableIter iter;
4751 if (!joinable_thread_count)
4755 joinable_threads_lock ();
4757 if (g_hash_table_size (joinable_threads)) {
4758 g_hash_table_iter_init (&iter, joinable_threads);
4759 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4760 thread = (pthread_t)tid;
4761 g_hash_table_remove (joinable_threads, key);
4762 joinable_thread_count --;
4765 joinable_threads_unlock ();
4767 if (thread != pthread_self ())
4768 /* This shouldn't block */
4769 pthread_join (thread, NULL);
4780 * Wait for thread TID to exit.
4781 * LOCKING: Acquires the threads lock.
4784 mono_thread_join (gpointer tid)
4788 gboolean found = FALSE;
4790 joinable_threads_lock ();
4791 if (!joinable_threads)
4792 joinable_threads = g_hash_table_new (NULL, NULL);
4793 if (g_hash_table_lookup (joinable_threads, tid)) {
4794 g_hash_table_remove (joinable_threads, tid);
4795 joinable_thread_count --;
4798 joinable_threads_unlock ();
4801 thread = (pthread_t)tid;
4802 pthread_join (thread, NULL);
4807 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4809 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4810 mono_thread_interruption_checkpoint ();
4813 static inline gboolean
4814 is_appdomainunloaded_exception (MonoClass *klass)
4816 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4818 if (!app_domain_unloaded_exception_klass)
4819 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4820 g_assert (app_domain_unloaded_exception_klass);
4822 return klass == app_domain_unloaded_exception_klass;
4825 static inline gboolean
4826 is_threadabort_exception (MonoClass *klass)
4828 return klass == mono_defaults.threadabortexception_class;
4832 mono_thread_internal_unhandled_exception (MonoObject* exc)
4834 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4835 MonoClass *klass = exc->vtable->klass;
4836 if (is_threadabort_exception (klass)) {
4837 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4838 } else if (!is_appdomainunloaded_exception (klass)) {
4839 mono_unhandled_exception (exc);
4840 if (mono_environment_exitcode_get () == 1)
4847 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4849 mono_threads_get_thread_dump (out_threads, out_stack_traces);