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;
152 /* Cleanup queue for contexts. */
153 static MonoReferenceQueue *context_queue;
156 * Threads which are starting up and they are not in the 'threads' hash yet.
157 * When handle_store is called for a thread, it will be removed from this hash table.
158 * Protected by mono_threads_lock ().
160 static MonoGHashTable *threads_starting_up = NULL;
162 /* The TLS key that holds the MonoObject assigned to each thread */
163 static MonoNativeTlsKey current_object_key;
166 /* Protected by the threads lock */
167 static GHashTable *joinable_threads;
168 static int joinable_thread_count;
170 #ifdef MONO_HAVE_FAST_TLS
171 /* we need to use both the Tls* functions and __thread because
172 * the gc needs to see all the threads
174 MONO_FAST_TLS_DECLARE(tls_current_object);
175 #define SET_CURRENT_OBJECT(x) do { \
176 MONO_FAST_TLS_SET (tls_current_object, x); \
177 mono_native_tls_set_value (current_object_key, x); \
179 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
181 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
182 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
185 /* function called at thread start */
186 static MonoThreadStartCB mono_thread_start_cb = NULL;
188 /* function called at thread attach */
189 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
191 /* function called at thread cleanup */
192 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
194 /* function called to notify the runtime about a pending exception on the current thread */
195 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
197 /* The default stack size for each thread */
198 static guint32 default_stacksize = 0;
199 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
201 static void thread_adjust_static_data (MonoInternalThread *thread);
202 static void context_adjust_static_data (MonoAppContext *ctx);
203 static void mono_free_static_data (gpointer* static_data);
204 static void mono_init_static_data_info (StaticDataInfo *static_data);
205 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
206 static gboolean mono_thread_resume (MonoInternalThread* thread);
207 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
208 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
209 static void self_suspend_internal (MonoInternalThread *thread);
211 static MonoException* mono_thread_execute_interruption (void);
212 static void ref_stack_destroy (gpointer rs);
214 /* Spin lock for InterlockedXXX 64 bit functions */
215 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
216 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
217 static mono_mutex_t interlocked_mutex;
219 /* global count of thread interruptions requested */
220 static gint32 thread_interruption_requested = 0;
222 /* Event signaled when a thread changes its background mode */
223 static HANDLE background_change_event;
225 static gboolean shutting_down = FALSE;
227 static gint32 managed_thread_id_counter = 0;
230 mono_threads_lock (void)
232 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
236 mono_threads_unlock (void)
238 mono_locks_coop_release (&threads_mutex, ThreadsLock);
243 get_next_managed_thread_id (void)
245 return InterlockedIncrement (&managed_thread_id_counter);
249 mono_thread_get_tls_key (void)
251 return current_object_key;
255 mono_thread_get_tls_offset (void)
258 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
262 static inline MonoNativeThreadId
263 thread_get_tid (MonoInternalThread *thread)
265 /* We store the tid as a guint64 to keep the object layout constant between platforms */
266 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
269 /* handle_store() and handle_remove() manage the array of threads that
270 * still need to be waited for when the main thread exits.
272 * If handle_store() returns FALSE the thread must not be started
273 * because Mono is shutting down.
275 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
277 mono_threads_lock ();
279 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
281 if (threads_starting_up)
282 mono_g_hash_table_remove (threads_starting_up, thread);
284 if (shutting_down && !force_attach) {
285 mono_threads_unlock ();
290 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
291 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
294 /* We don't need to duplicate thread->handle, because it is
295 * only closed when the thread object is finalized by the GC.
297 g_assert (thread->internal_thread);
298 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
299 thread->internal_thread);
301 mono_threads_unlock ();
306 static gboolean handle_remove(MonoInternalThread *thread)
309 gsize tid = thread->tid;
311 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
313 mono_threads_lock ();
316 /* We have to check whether the thread object for the
317 * tid is still the same in the table because the
318 * thread might have been destroyed and the tid reused
319 * in the meantime, in which case the tid would be in
320 * the table, but with another thread object.
322 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
323 mono_g_hash_table_remove (threads, (gpointer)tid);
332 mono_threads_unlock ();
334 /* Don't close the handle here, wait for the object finalizer
335 * to do it. Otherwise, the following race condition applies:
337 * 1) Thread exits (and handle_remove() closes the handle)
339 * 2) Some other handle is reassigned the same slot
341 * 3) Another thread tries to join the first thread, and
342 * blocks waiting for the reassigned handle to be signalled
343 * (which might never happen). This is possible, because the
344 * thread calling Join() still has a reference to the first
350 static void ensure_synch_cs_set (MonoInternalThread *thread)
352 MonoCoopMutex *synch_cs;
354 if (thread->synch_cs != NULL) {
358 synch_cs = g_new0 (MonoCoopMutex, 1);
359 mono_coop_mutex_init_recursive (synch_cs);
361 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
362 synch_cs, NULL) != NULL) {
363 /* Another thread must have installed this CS */
364 mono_coop_mutex_destroy (synch_cs);
370 lock_thread (MonoInternalThread *thread)
372 if (!thread->synch_cs)
373 ensure_synch_cs_set (thread);
375 g_assert (thread->synch_cs);
377 mono_coop_mutex_lock (thread->synch_cs);
381 unlock_thread (MonoInternalThread *thread)
383 mono_coop_mutex_unlock (thread->synch_cs);
387 * NOTE: this function can be called also for threads different from the current one:
388 * make sure no code called from it will ever assume it is run on the thread that is
389 * getting cleaned up.
391 static void thread_cleanup (MonoInternalThread *thread)
393 g_assert (thread != NULL);
395 if (thread->abort_state_handle) {
396 mono_gchandle_free (thread->abort_state_handle);
397 thread->abort_state_handle = 0;
399 thread->abort_exc = NULL;
400 thread->current_appcontext = NULL;
403 * This is necessary because otherwise we might have
404 * cross-domain references which will not get cleaned up when
405 * the target domain is unloaded.
407 if (thread->cached_culture_info) {
409 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
410 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
414 * thread->synch_cs can be NULL if this was called after
415 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
416 * This can happen only during shutdown.
417 * The shutting_down flag is not always set, so we can't assert on it.
419 if (thread->synch_cs)
420 LOCK_THREAD (thread);
422 thread->state |= ThreadState_Stopped;
423 thread->state &= ~ThreadState_Background;
425 if (thread->synch_cs)
426 UNLOCK_THREAD (thread);
429 An interruption request has leaked to cleanup. Adjust the global counter.
431 This can happen is the abort source thread finds the abortee (this) thread
432 in unmanaged code. If this thread never trips back to managed code or check
433 the local flag it will be left set and positively unbalance the global counter.
435 Leaving the counter unbalanced will cause a performance degradation since all threads
436 will now keep checking their local flags all the time.
438 if (InterlockedExchange (&thread->interruption_requested, 0))
439 InterlockedDecrement (&thread_interruption_requested);
441 /* if the thread is not in the hash it has been removed already */
442 if (!handle_remove (thread)) {
443 if (thread == mono_thread_internal_current ()) {
444 mono_domain_unset ();
445 mono_memory_barrier ();
447 /* This needs to be called even if handle_remove () fails */
448 if (mono_thread_cleanup_fn)
449 mono_thread_cleanup_fn (thread_get_tid (thread));
452 mono_release_type_locks (thread);
454 mono_profiler_thread_end (thread->tid);
456 if (thread == mono_thread_internal_current ()) {
458 * This will signal async signal handlers that the thread has exited.
459 * The profiler callback needs this to be set, so it cannot be done earlier.
461 mono_domain_unset ();
462 mono_memory_barrier ();
465 if (thread == mono_thread_internal_current ())
466 mono_thread_pop_appdomain_ref ();
468 thread->cached_culture_info = NULL;
470 mono_free_static_data (thread->static_data);
471 thread->static_data = NULL;
472 ref_stack_destroy (thread->appdomain_refs);
473 thread->appdomain_refs = NULL;
475 if (mono_thread_cleanup_fn)
476 mono_thread_cleanup_fn (thread_get_tid (thread));
478 if (mono_gc_is_moving ()) {
479 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
480 thread->thread_pinning_ref = NULL;
486 * A special static data offset (guint32) consists of 3 parts:
488 * [0] 6-bit index into the array of chunks.
489 * [6] 25-bit offset into the array.
490 * [31] Bit indicating thread or context static.
495 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
506 } SpecialStaticOffset;
508 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
509 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
511 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
512 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
513 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
514 (((SpecialStaticOffset *) &(x))->fields.f)
517 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
519 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
521 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
522 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
524 return ((char *) thread->static_data [idx]) + off;
528 get_context_static_data (MonoAppContext *ctx, guint32 offset)
530 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
532 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
533 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
535 return ((char *) ctx->static_data [idx]) + off;
539 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
541 static MonoClassField *current_thread_field = NULL;
545 if (!current_thread_field) {
546 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
547 g_assert (current_thread_field);
550 mono_class_vtable (domain, mono_defaults.thread_class);
551 mono_domain_lock (domain);
552 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
553 mono_domain_unlock (domain);
556 return (MonoThread **)get_thread_static_data (thread, offset);
560 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
562 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
564 g_assert (current->obj.vtable->domain == domain);
566 g_assert (!*current_thread_ptr);
567 *current_thread_ptr = current;
571 create_thread_object (MonoDomain *domain)
574 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
575 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, &error);
576 mono_error_raise_exception (&error); /* FIXME don't raise here */
581 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
583 MonoThread *thread = create_thread_object (domain);
584 MONO_OBJECT_SETREF (thread, internal_thread, internal);
588 static MonoInternalThread*
589 create_internal_thread (void)
592 MonoInternalThread *thread;
595 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
596 thread = (MonoInternalThread*)mono_object_new_mature (vt, &error);
597 mono_error_raise_exception (&error); /* FIXME don't raise here */
599 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
600 mono_coop_mutex_init_recursive (thread->synch_cs);
602 thread->apartment_state = ThreadApartmentState_Unknown;
603 thread->managed_id = get_next_managed_thread_id ();
604 if (mono_gc_is_moving ()) {
605 thread->thread_pinning_ref = thread;
606 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
613 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
615 MonoDomain *domain = mono_get_root_domain ();
617 if (!candidate || candidate->obj.vtable->domain != domain)
618 candidate = new_thread_with_internal (domain, thread);
619 set_current_thread_for_domain (domain, thread, candidate);
620 g_assert (!thread->root_domain_thread);
621 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
624 static guint32 WINAPI start_wrapper_internal(void *data)
626 MonoThreadInfo *info;
627 StartInfo *start_info = (StartInfo *)data;
628 guint32 (*start_func)(void *);
632 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
635 MonoInternalThread *internal = start_info->obj->internal_thread;
636 MonoObject *start_delegate = start_info->delegate;
637 MonoDomain *domain = start_info->obj->obj.vtable->domain;
639 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
641 /* We can be sure start_info->obj->tid and
642 * start_info->obj->handle have been set, because the thread
643 * was created suspended, and these values were set before the
647 info = mono_thread_info_current ();
649 internal->thread_info = info;
650 internal->small_id = info->small_id;
654 SET_CURRENT_OBJECT (internal);
656 /* Every thread references the appdomain which created it */
657 mono_thread_push_appdomain_ref (domain);
659 if (!mono_domain_set (domain, FALSE)) {
660 /* No point in raising an appdomain_unloaded exception here */
661 /* FIXME: Cleanup here */
662 mono_thread_pop_appdomain_ref ();
666 start_func = start_info->func;
667 start_arg = start_info->obj->start_obj;
669 start_arg = start_info->start_arg;
671 /* We have to do this here because mono_thread_new_init()
672 requires that root_domain_thread is set up. */
673 thread_adjust_static_data (internal);
674 init_root_domain_thread (internal, start_info->obj);
676 /* This MUST be called before any managed code can be
677 * executed, as it calls the callback function that (for the
678 * jit) sets the lmf marker.
680 mono_thread_new_init (tid, &tid, start_func);
681 internal->stack_ptr = &tid;
682 if (domain != mono_get_root_domain ())
683 set_current_thread_for_domain (domain, internal, start_info->obj);
685 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
687 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
689 /* On 2.0 profile (and higher), set explicitly since state might have been
691 if (internal->apartment_state == ThreadApartmentState_Unknown)
692 internal->apartment_state = ThreadApartmentState_MTA;
694 mono_thread_init_apartment_state ();
696 if(internal->start_notify!=NULL) {
697 /* Let the thread that called Start() know we're
700 ReleaseSemaphore (internal->start_notify, 1, NULL);
704 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
708 * Call this after calling start_notify, since the profiler callback might want
709 * to lock the thread, and the lock is held by thread_start () which waits for
712 mono_profiler_thread_start (tid);
714 /* if the name was set before starting, we didn't invoke the profiler callback */
715 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
716 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
717 mono_profiler_thread_name (internal->tid, tname);
720 /* start_func is set only for unmanaged start functions */
722 start_func (start_arg);
725 g_assert (start_delegate != NULL);
726 args [0] = start_arg;
727 /* we may want to handle the exception here. See comment below on unhandled exceptions */
728 mono_runtime_delegate_invoke (start_delegate, args, NULL);
731 /* If the thread calls ExitThread at all, this remaining code
732 * will not be executed, but the main thread will eventually
733 * call thread_cleanup() on this thread's behalf.
736 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
738 /* Do any cleanup needed for apartment state. This
739 * cannot be done in thread_cleanup since thread_cleanup could be
740 * called for a thread other than the current thread.
741 * mono_thread_cleanup_apartment_state cleans up apartment
742 * for the current thead */
743 mono_thread_cleanup_apartment_state ();
745 thread_cleanup (internal);
749 /* Remove the reference to the thread object in the TLS data,
750 * so the thread object can be finalized. This won't be
751 * reached if the thread threw an uncaught exception, so those
752 * thread handles will stay referenced :-( (This is due to
753 * missing support for scanning thread-specific data in the
754 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
757 SET_CURRENT_OBJECT (NULL);
762 static guint32 WINAPI start_wrapper(void *data)
766 /* Avoid scanning the frames above this frame during a GC */
767 mono_gc_set_stack_end ((void*)&dummy);
769 return start_wrapper_internal (data);
775 * Common thread creation code.
776 * LOCKING: Acquires the threads lock.
779 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
780 gboolean throw_on_failure)
782 HANDLE thread_handle;
783 MonoNativeThreadId tid;
784 guint32 create_flags;
787 * Join joinable threads to prevent running out of threads since the finalizer
788 * thread might be blocked/backlogged.
790 mono_threads_join_threads ();
792 mono_threads_lock ();
795 mono_threads_unlock ();
798 if (threads_starting_up == NULL) {
799 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
800 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
802 mono_g_hash_table_insert (threads_starting_up, thread, thread);
803 mono_threads_unlock ();
805 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
806 if (!internal->start_notify) {
807 mono_threads_lock ();
808 mono_g_hash_table_remove (threads_starting_up, thread);
809 mono_threads_unlock ();
810 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
816 stack_size = default_stacksize_for_thread (internal);
818 /* Create suspended, so we can do some housekeeping before the thread
821 create_flags = CREATE_SUSPENDED;
823 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
824 stack_size, create_flags, &tid);
826 if (thread_handle == NULL) {
827 /* The thread couldn't be created, so throw an exception */
828 mono_threads_lock ();
829 mono_g_hash_table_remove (threads_starting_up, thread);
830 mono_threads_unlock ();
832 if (throw_on_failure)
833 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
835 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
838 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
840 internal->handle = thread_handle;
841 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
843 internal->threadpool_thread = threadpool_thread;
844 if (threadpool_thread)
845 mono_thread_set_state (internal, ThreadState_Background);
847 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
849 /* Only store the handle when the thread is about to be
850 * launched, to avoid the main thread deadlocking while trying
851 * to clean up a thread that will never be signalled.
853 if (!handle_store (thread, FALSE))
856 mono_thread_info_resume (tid);
858 if (internal->start_notify) {
860 * Wait for the thread to set up its TLS data etc, so
861 * theres no potential race condition if someone tries
862 * to look up the data believing the thread has
865 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));
867 MONO_PREPARE_BLOCKING;
868 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
869 MONO_FINISH_BLOCKING;
871 CloseHandle (internal->start_notify);
872 internal->start_notify = NULL;
875 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));
880 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
882 if (mono_thread_start_cb) {
883 mono_thread_start_cb (tid, stack_start, func);
887 void mono_threads_set_default_stacksize (guint32 stacksize)
889 default_stacksize = stacksize;
892 guint32 mono_threads_get_default_stacksize (void)
894 return default_stacksize;
898 * mono_thread_create_internal:
900 * ARG should not be a GC reference.
903 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
906 MonoInternalThread *internal;
907 StartInfo *start_info;
910 thread = create_thread_object (domain);
911 internal = create_internal_thread ();
912 MONO_OBJECT_SETREF (thread, internal_thread, internal);
914 start_info = g_new0 (StartInfo, 1);
915 start_info->func = (guint32 (*)(void *))func;
916 start_info->obj = thread;
917 start_info->start_arg = arg;
919 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
923 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
924 #ifndef MONO_CROSS_COMPILE
925 if (mono_check_corlib_version () == NULL)
926 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
933 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
935 mono_thread_create_internal (domain, func, arg, FALSE, 0);
939 mono_thread_attach (MonoDomain *domain)
941 return mono_thread_attach_full (domain, FALSE);
945 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
947 MonoThreadInfo *info;
948 MonoInternalThread *thread;
949 MonoThread *current_thread;
950 HANDLE thread_handle;
951 MonoNativeThreadId tid;
953 if ((thread = mono_thread_internal_current ())) {
954 if (domain != mono_domain_get ())
955 mono_domain_set (domain, TRUE);
956 /* Already attached */
957 return mono_thread_current ();
960 if (!mono_gc_register_thread (&domain)) {
961 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 ());
964 thread = create_internal_thread ();
966 thread_handle = mono_thread_info_open_handle ();
967 g_assert (thread_handle);
969 tid=mono_native_thread_id_get ();
971 thread->handle = thread_handle;
972 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
973 thread->stack_ptr = &tid;
975 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
977 info = mono_thread_info_current ();
979 thread->thread_info = info;
980 thread->small_id = info->small_id;
982 current_thread = new_thread_with_internal (domain, thread);
984 if (!handle_store (current_thread, force_attach)) {
985 /* Mono is shutting down, so just wait for the end */
987 mono_thread_info_sleep (10000, NULL);
990 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
992 SET_CURRENT_OBJECT (thread);
993 mono_domain_set (domain, TRUE);
995 thread_adjust_static_data (thread);
997 init_root_domain_thread (thread, current_thread);
998 if (domain != mono_get_root_domain ())
999 set_current_thread_for_domain (domain, thread, current_thread);
1002 if (mono_thread_attach_cb) {
1006 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1009 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1011 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1014 // FIXME: Need a separate callback
1015 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1017 return current_thread;
1021 mono_thread_detach_internal (MonoInternalThread *thread)
1023 g_return_if_fail (thread != NULL);
1025 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1027 thread_cleanup (thread);
1029 SET_CURRENT_OBJECT (NULL);
1030 mono_domain_unset ();
1032 /* Don't need to CloseHandle this thread, even though we took a
1033 * reference in mono_thread_attach (), because the GC will do it
1034 * when the Thread object is finalised.
1039 mono_thread_detach (MonoThread *thread)
1042 mono_thread_detach_internal (thread->internal_thread);
1046 * mono_thread_detach_if_exiting:
1048 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1049 * This should be used at the end of embedding code which calls into managed code, and which
1050 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1053 mono_thread_detach_if_exiting (void)
1055 if (mono_thread_info_is_exiting ()) {
1056 MonoInternalThread *thread;
1058 thread = mono_thread_internal_current ();
1060 mono_thread_detach_internal (thread);
1061 mono_thread_info_detach ();
1069 MonoInternalThread *thread = mono_thread_internal_current ();
1071 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1073 thread_cleanup (thread);
1074 SET_CURRENT_OBJECT (NULL);
1075 mono_domain_unset ();
1077 /* we could add a callback here for embedders to use. */
1078 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1079 exit (mono_environment_exitcode_get ());
1080 mono_thread_info_exit ();
1084 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1086 MonoInternalThread *internal = create_internal_thread ();
1088 internal->state = ThreadState_Unstarted;
1090 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1094 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1097 StartInfo *start_info;
1098 MonoInternalThread *internal;
1101 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1103 if (!this_obj->internal_thread)
1104 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1105 internal = this_obj->internal_thread;
1107 LOCK_THREAD (internal);
1109 if ((internal->state & ThreadState_Unstarted) == 0) {
1110 UNLOCK_THREAD (internal);
1111 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1115 if ((internal->state & ThreadState_Aborted) != 0) {
1116 UNLOCK_THREAD (internal);
1119 /* This is freed in start_wrapper */
1120 start_info = g_new0 (StartInfo, 1);
1121 start_info->func = NULL;
1122 start_info->start_arg = NULL;
1123 start_info->delegate = start;
1124 start_info->obj = this_obj;
1125 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1127 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1129 UNLOCK_THREAD (internal);
1133 internal->state &= ~ThreadState_Unstarted;
1135 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1137 UNLOCK_THREAD (internal);
1138 return internal->handle;
1142 * This is called from the finalizer of the internal thread object.
1145 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1147 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1150 * Since threads keep a reference to their thread object while running, by the time this function is called,
1151 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1152 * when thread_cleanup () can be called after this.
1155 CloseHandle (thread);
1157 if (this_obj->synch_cs) {
1158 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1159 this_obj->synch_cs = NULL;
1160 mono_coop_mutex_destroy (synch_cs);
1164 if (this_obj->name) {
1165 void *name = this_obj->name;
1166 this_obj->name = NULL;
1172 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1175 MonoInternalThread *thread = mono_thread_internal_current ();
1177 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1179 mono_thread_current_check_pending_interrupt ();
1182 gboolean alerted = FALSE;
1184 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1186 res = mono_thread_info_sleep (ms, &alerted);
1188 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1191 MonoException* exc = mono_thread_execute_interruption ();
1193 mono_raise_exception (exc);
1205 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1210 ves_icall_System_Threading_Thread_GetDomainID (void)
1212 return mono_domain_get()->domain_id;
1216 ves_icall_System_Threading_Thread_Yield (void)
1218 return mono_thread_info_yield ();
1222 * mono_thread_get_name:
1224 * Return the name of the thread. NAME_LEN is set to the length of the name.
1225 * Return NULL if the thread has no name. The returned memory is owned by the
1229 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1233 LOCK_THREAD (this_obj);
1235 if (!this_obj->name) {
1239 *name_len = this_obj->name_len;
1240 res = g_new (gunichar2, this_obj->name_len);
1241 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1244 UNLOCK_THREAD (this_obj);
1250 * mono_thread_get_name_utf8:
1252 * Return the name of the thread in UTF-8.
1253 * Return NULL if the thread has no name.
1254 * The returned memory is owned by the caller.
1257 mono_thread_get_name_utf8 (MonoThread *thread)
1262 MonoInternalThread *internal = thread->internal_thread;
1263 if (internal == NULL)
1266 LOCK_THREAD (internal);
1268 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1270 UNLOCK_THREAD (internal);
1276 * mono_thread_get_managed_id:
1278 * Return the Thread.ManagedThreadId value of `thread`.
1279 * Returns -1 if `thread` is NULL.
1282 mono_thread_get_managed_id (MonoThread *thread)
1287 MonoInternalThread *internal = thread->internal_thread;
1288 if (internal == NULL)
1291 int32_t id = internal->managed_id;
1297 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1301 LOCK_THREAD (this_obj);
1303 if (!this_obj->name)
1306 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1308 UNLOCK_THREAD (this_obj);
1314 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1316 LOCK_THREAD (this_obj);
1318 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1319 UNLOCK_THREAD (this_obj);
1321 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1324 if (this_obj->name) {
1325 g_free (this_obj->name);
1326 this_obj->name_len = 0;
1329 this_obj->name = g_new (gunichar2, mono_string_length (name));
1330 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1331 this_obj->name_len = mono_string_length (name);
1334 this_obj->name = NULL;
1337 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1339 UNLOCK_THREAD (this_obj);
1341 if (this_obj->name && this_obj->tid) {
1342 char *tname = mono_string_to_utf8 (name);
1343 mono_profiler_thread_name (this_obj->tid, tname);
1344 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1350 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1352 mono_thread_set_name_internal (this_obj, name, TRUE);
1356 * ves_icall_System_Threading_Thread_GetPriority_internal:
1357 * @param this_obj: The MonoInternalThread on which to operate.
1359 * Gets the priority of the given thread.
1360 * @return: The priority of the given thread.
1363 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1366 MonoInternalThread *internal = this_obj->internal_thread;
1368 LOCK_THREAD (internal);
1369 priority = GetThreadPriority (internal->handle) + 2;
1370 UNLOCK_THREAD (internal);
1375 * ves_icall_System_Threading_Thread_SetPriority_internal:
1376 * @param this_obj: The MonoInternalThread on which to operate.
1377 * @param priority: The priority to set.
1379 * Sets the priority of the given thread.
1382 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1384 MonoInternalThread *internal = this_obj->internal_thread;
1386 LOCK_THREAD (internal);
1387 SetThreadPriority (internal->handle, priority - 2);
1388 UNLOCK_THREAD (internal);
1391 /* If the array is already in the requested domain, we just return it,
1392 otherwise we return a copy in that domain. */
1394 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1401 if (mono_object_domain (arr) == domain)
1404 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1405 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1410 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1412 return byte_array_to_domain (arr, mono_get_root_domain ());
1416 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1418 return byte_array_to_domain (arr, mono_domain_get ());
1422 mono_thread_current (void)
1424 MonoDomain *domain = mono_domain_get ();
1425 MonoInternalThread *internal = mono_thread_internal_current ();
1426 MonoThread **current_thread_ptr;
1428 g_assert (internal);
1429 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1431 if (!*current_thread_ptr) {
1432 g_assert (domain != mono_get_root_domain ());
1433 *current_thread_ptr = new_thread_with_internal (domain, internal);
1435 return *current_thread_ptr;
1438 /* Return the thread object belonging to INTERNAL in the current domain */
1440 mono_thread_current_for_thread (MonoInternalThread *internal)
1442 MonoDomain *domain = mono_domain_get ();
1443 MonoThread **current_thread_ptr;
1445 g_assert (internal);
1446 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1448 if (!*current_thread_ptr) {
1449 g_assert (domain != mono_get_root_domain ());
1450 *current_thread_ptr = new_thread_with_internal (domain, internal);
1452 return *current_thread_ptr;
1456 mono_thread_internal_current (void)
1458 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1459 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1464 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1466 MonoInternalThread *thread = this_obj->internal_thread;
1467 HANDLE handle = thread->handle;
1468 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1471 mono_thread_current_check_pending_interrupt ();
1473 LOCK_THREAD (thread);
1475 if ((thread->state & ThreadState_Unstarted) != 0) {
1476 UNLOCK_THREAD (thread);
1478 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1482 UNLOCK_THREAD (thread);
1487 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1489 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1491 MONO_PREPARE_BLOCKING;
1492 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1493 MONO_FINISH_BLOCKING;
1495 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1497 if(ret==WAIT_OBJECT_0) {
1498 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1503 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1509 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1517 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1519 MONO_PREPARE_BLOCKING;
1521 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1523 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1524 MONO_FINISH_BLOCKING;
1526 if (ret != WAIT_IO_COMPLETION)
1529 exc = mono_thread_execute_interruption ();
1531 mono_raise_exception (exc);
1536 /* Re-calculate ms according to the time passed */
1537 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1538 if (diff_ms >= ms) {
1542 wait = ms - diff_ms;
1548 /* FIXME: exitContext isnt documented */
1549 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1555 MonoObject *waitHandle;
1556 MonoInternalThread *thread = mono_thread_internal_current ();
1558 /* Do this WaitSleepJoin check before creating objects */
1559 mono_thread_current_check_pending_interrupt ();
1561 /* We fail in managed if the array has more than 64 elements */
1562 numhandles = (guint32)mono_array_length(mono_handles);
1563 handles = g_new0(HANDLE, numhandles);
1565 for(i = 0; i < numhandles; i++) {
1566 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1567 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1574 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1576 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1578 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1582 if(ret==WAIT_FAILED) {
1583 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1585 } else if(ret==WAIT_TIMEOUT) {
1586 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1593 /* FIXME: exitContext isnt documented */
1594 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1596 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1597 uintptr_t numhandles;
1600 MonoObject *waitHandle;
1601 MonoInternalThread *thread = mono_thread_internal_current ();
1603 /* Do this WaitSleepJoin check before creating objects */
1604 mono_thread_current_check_pending_interrupt ();
1606 numhandles = mono_array_length(mono_handles);
1607 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1610 for(i = 0; i < numhandles; i++) {
1611 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1612 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1619 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1621 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1623 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1625 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1628 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1630 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1631 return ret - WAIT_OBJECT_0;
1633 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1634 return ret - WAIT_ABANDONED_0;
1641 /* FIXME: exitContext isnt documented */
1642 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1645 MonoInternalThread *thread = mono_thread_internal_current ();
1647 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1653 mono_thread_current_check_pending_interrupt ();
1655 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1657 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1659 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1661 if(ret==WAIT_FAILED) {
1662 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1664 } else if(ret==WAIT_TIMEOUT) {
1665 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1673 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1676 MonoInternalThread *thread = mono_thread_internal_current ();
1681 mono_thread_current_check_pending_interrupt ();
1683 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1685 MONO_PREPARE_BLOCKING;
1686 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1687 MONO_FINISH_BLOCKING;
1689 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1691 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1694 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1701 mutex = CreateMutex (NULL, owned, NULL);
1703 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1705 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1713 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1714 return(ReleaseMutex (handle));
1717 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1723 *error = ERROR_SUCCESS;
1725 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1727 *error = GetLastError ();
1734 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1741 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1743 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1744 mono_string_chars (name));
1746 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1754 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1758 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1763 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1767 *error = ERROR_SUCCESS;
1769 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1771 *error = GetLastError ();
1777 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1784 event = CreateEvent (NULL, manual, initial, NULL);
1786 event = CreateEvent (NULL, manual, initial,
1787 mono_string_chars (name));
1789 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1797 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1798 return (SetEvent(handle));
1801 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1802 return (ResetEvent(handle));
1806 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1807 CloseHandle (handle);
1810 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1816 *error = ERROR_SUCCESS;
1818 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1820 *error = GetLastError ();
1826 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1828 return InterlockedIncrement (location);
1831 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1833 #if SIZEOF_VOID_P == 4
1834 if (G_UNLIKELY ((size_t)location & 0x7)) {
1836 mono_interlocked_lock ();
1839 mono_interlocked_unlock ();
1843 return InterlockedIncrement64 (location);
1846 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1848 return InterlockedDecrement(location);
1851 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1853 #if SIZEOF_VOID_P == 4
1854 if (G_UNLIKELY ((size_t)location & 0x7)) {
1856 mono_interlocked_lock ();
1859 mono_interlocked_unlock ();
1863 return InterlockedDecrement64 (location);
1866 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1868 return InterlockedExchange(location, value);
1871 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1874 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1875 mono_gc_wbarrier_generic_nostore (location);
1879 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1881 return InterlockedExchangePointer(location, value);
1884 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1886 IntFloatUnion val, ret;
1889 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1895 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1897 #if SIZEOF_VOID_P == 4
1898 if (G_UNLIKELY ((size_t)location & 0x7)) {
1900 mono_interlocked_lock ();
1903 mono_interlocked_unlock ();
1907 return InterlockedExchange64 (location, value);
1911 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1913 LongDoubleUnion val, ret;
1916 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1921 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1923 return InterlockedCompareExchange(location, value, comparand);
1926 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1928 gint32 r = InterlockedCompareExchange(location, value, comparand);
1929 *success = r == comparand;
1933 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1936 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1937 mono_gc_wbarrier_generic_nostore (location);
1941 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1943 return InterlockedCompareExchangePointer(location, value, comparand);
1946 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1948 IntFloatUnion val, ret, cmp;
1951 cmp.fval = comparand;
1952 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1958 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1960 #if SIZEOF_VOID_P == 8
1961 LongDoubleUnion val, comp, ret;
1964 comp.fval = comparand;
1965 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1971 mono_interlocked_lock ();
1973 if (old == comparand)
1975 mono_interlocked_unlock ();
1982 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1984 #if SIZEOF_VOID_P == 4
1985 if (G_UNLIKELY ((size_t)location & 0x7)) {
1987 mono_interlocked_lock ();
1989 if (old == comparand)
1991 mono_interlocked_unlock ();
1995 return InterlockedCompareExchange64 (location, value, comparand);
1999 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2002 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2003 mono_gc_wbarrier_generic_nostore (location);
2008 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2011 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2012 mono_gc_wbarrier_generic_nostore (location);
2017 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2019 return InterlockedAdd (location, value);
2023 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2025 #if SIZEOF_VOID_P == 4
2026 if (G_UNLIKELY ((size_t)location & 0x7)) {
2028 mono_interlocked_lock ();
2031 mono_interlocked_unlock ();
2035 return InterlockedAdd64 (location, value);
2039 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2041 #if SIZEOF_VOID_P == 4
2042 if (G_UNLIKELY ((size_t)location & 0x7)) {
2044 mono_interlocked_lock ();
2046 mono_interlocked_unlock ();
2050 return InterlockedRead64 (location);
2054 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2056 mono_memory_barrier ();
2060 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2062 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2064 if (state & ThreadState_Background) {
2065 /* If the thread changes the background mode, the main thread has to
2066 * be notified, since it has to rebuild the list of threads to
2069 SetEvent (background_change_event);
2074 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2076 mono_thread_set_state (this_obj, (MonoThreadState)state);
2078 if (state & ThreadState_Background) {
2079 /* If the thread changes the background mode, the main thread has to
2080 * be notified, since it has to rebuild the list of threads to
2083 SetEvent (background_change_event);
2088 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2092 LOCK_THREAD (this_obj);
2094 state = this_obj->state;
2096 UNLOCK_THREAD (this_obj);
2101 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2103 MonoInternalThread *current;
2105 MonoInternalThread *thread = this_obj->internal_thread;
2107 LOCK_THREAD (thread);
2109 current = mono_thread_internal_current ();
2111 thread->thread_interrupt_requested = TRUE;
2112 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2114 UNLOCK_THREAD (thread);
2117 abort_thread_internal (thread, TRUE, FALSE);
2121 void mono_thread_current_check_pending_interrupt ()
2123 MonoInternalThread *thread = mono_thread_internal_current ();
2124 gboolean throw_ = FALSE;
2126 LOCK_THREAD (thread);
2128 if (thread->thread_interrupt_requested) {
2130 thread->thread_interrupt_requested = FALSE;
2133 UNLOCK_THREAD (thread);
2136 mono_raise_exception (mono_get_exception_thread_interrupted ());
2141 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2143 LOCK_THREAD (thread);
2145 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2146 (thread->state & ThreadState_StopRequested) != 0 ||
2147 (thread->state & ThreadState_Stopped) != 0)
2149 UNLOCK_THREAD (thread);
2153 if ((thread->state & ThreadState_Unstarted) != 0) {
2154 thread->state |= ThreadState_Aborted;
2155 UNLOCK_THREAD (thread);
2159 thread->state |= ThreadState_AbortRequested;
2160 if (thread->abort_state_handle)
2161 mono_gchandle_free (thread->abort_state_handle);
2163 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2164 g_assert (thread->abort_state_handle);
2166 thread->abort_state_handle = 0;
2168 thread->abort_exc = NULL;
2170 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));
2172 /* During shutdown, we can't wait for other threads */
2174 /* Make sure the thread is awake */
2175 mono_thread_resume (thread);
2177 UNLOCK_THREAD (thread);
2179 abort_thread_internal (thread, TRUE, TRUE);
2183 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2185 MonoInternalThread *thread = mono_thread_internal_current ();
2186 gboolean was_aborting;
2188 LOCK_THREAD (thread);
2189 was_aborting = thread->state & ThreadState_AbortRequested;
2190 thread->state &= ~ThreadState_AbortRequested;
2191 UNLOCK_THREAD (thread);
2193 if (!was_aborting) {
2194 const char *msg = "Unable to reset abort because no abort was requested";
2195 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2198 thread->abort_exc = NULL;
2199 if (thread->abort_state_handle) {
2200 mono_gchandle_free (thread->abort_state_handle);
2201 /* This is actually not necessary - the handle
2202 only counts if the exception is set */
2203 thread->abort_state_handle = 0;
2208 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2210 LOCK_THREAD (thread);
2212 thread->state &= ~ThreadState_AbortRequested;
2214 if (thread->abort_exc) {
2215 thread->abort_exc = NULL;
2216 if (thread->abort_state_handle) {
2217 mono_gchandle_free (thread->abort_state_handle);
2218 /* This is actually not necessary - the handle
2219 only counts if the exception is set */
2220 thread->abort_state_handle = 0;
2224 UNLOCK_THREAD (thread);
2228 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2230 MonoInternalThread *thread = this_obj->internal_thread;
2231 MonoObject *state, *deserialized = NULL, *exc;
2234 if (!thread->abort_state_handle)
2237 state = mono_gchandle_get_target (thread->abort_state_handle);
2240 domain = mono_domain_get ();
2241 if (mono_object_domain (state) == domain)
2244 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2246 if (!deserialized) {
2247 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2249 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2250 mono_set_pending_exception (invalid_op_exc);
2254 return deserialized;
2258 mono_thread_suspend (MonoInternalThread *thread)
2260 LOCK_THREAD (thread);
2262 if ((thread->state & ThreadState_Unstarted) != 0 ||
2263 (thread->state & ThreadState_Aborted) != 0 ||
2264 (thread->state & ThreadState_Stopped) != 0)
2266 UNLOCK_THREAD (thread);
2270 if ((thread->state & ThreadState_Suspended) != 0 ||
2271 (thread->state & ThreadState_SuspendRequested) != 0 ||
2272 (thread->state & ThreadState_StopRequested) != 0)
2274 UNLOCK_THREAD (thread);
2278 thread->state |= ThreadState_SuspendRequested;
2280 UNLOCK_THREAD (thread);
2282 suspend_thread_internal (thread, FALSE);
2287 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2289 if (!mono_thread_suspend (this_obj->internal_thread)) {
2290 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2295 /* LOCKING: LOCK_THREAD(thread) must be held */
2297 mono_thread_resume (MonoInternalThread *thread)
2299 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2300 thread->state &= ~ThreadState_SuspendRequested;
2304 if ((thread->state & ThreadState_Suspended) == 0 ||
2305 (thread->state & ThreadState_Unstarted) != 0 ||
2306 (thread->state & ThreadState_Aborted) != 0 ||
2307 (thread->state & ThreadState_Stopped) != 0)
2312 UNLOCK_THREAD (thread);
2314 /* Awake the thread */
2315 if (!mono_thread_info_resume (thread_get_tid (thread)))
2318 LOCK_THREAD (thread);
2320 thread->state &= ~ThreadState_Suspended;
2326 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2328 if (!thread->internal_thread) {
2329 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2331 LOCK_THREAD (thread->internal_thread);
2332 if (!mono_thread_resume (thread->internal_thread))
2333 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2334 UNLOCK_THREAD (thread->internal_thread);
2339 mono_threads_is_critical_method (MonoMethod *method)
2341 switch (method->wrapper_type) {
2342 case MONO_WRAPPER_RUNTIME_INVOKE:
2343 case MONO_WRAPPER_XDOMAIN_INVOKE:
2344 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2351 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2356 if (mono_threads_is_critical_method (m)) {
2357 *((gboolean*)data) = TRUE;
2364 is_running_protected_wrapper (void)
2366 gboolean found = FALSE;
2367 mono_stack_walk (find_wrapper, &found);
2371 void mono_thread_internal_stop (MonoInternalThread *thread)
2373 LOCK_THREAD (thread);
2375 if ((thread->state & ThreadState_StopRequested) != 0 ||
2376 (thread->state & ThreadState_Stopped) != 0)
2378 UNLOCK_THREAD (thread);
2382 /* Make sure the thread is awake */
2383 mono_thread_resume (thread);
2385 thread->state |= ThreadState_StopRequested;
2386 thread->state &= ~ThreadState_AbortRequested;
2388 UNLOCK_THREAD (thread);
2390 abort_thread_internal (thread, TRUE, TRUE);
2393 void mono_thread_stop (MonoThread *thread)
2395 mono_thread_internal_stop (thread->internal_thread);
2399 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2401 gint8 tmp = *(volatile gint8 *)ptr;
2402 mono_memory_barrier ();
2407 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2409 gint16 tmp = *(volatile gint16 *)ptr;
2410 mono_memory_barrier ();
2415 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2417 gint32 tmp = *(volatile gint32 *)ptr;
2418 mono_memory_barrier ();
2423 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2425 gint64 tmp = *(volatile gint64 *)ptr;
2426 mono_memory_barrier ();
2431 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2433 volatile void *tmp = *(volatile void **)ptr;
2434 mono_memory_barrier ();
2435 return (void *) tmp;
2439 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2441 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2442 mono_memory_barrier ();
2443 return (MonoObject *) tmp;
2447 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2449 double tmp = *(volatile double *)ptr;
2450 mono_memory_barrier ();
2455 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2457 float tmp = *(volatile float *)ptr;
2458 mono_memory_barrier ();
2463 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2465 return InterlockedRead8 ((volatile gint8 *)ptr);
2469 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2471 return InterlockedRead16 ((volatile gint16 *)ptr);
2475 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2477 return InterlockedRead ((volatile gint32 *)ptr);
2481 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2483 #if SIZEOF_VOID_P == 4
2484 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2486 mono_interlocked_lock ();
2487 val = *(gint64*)ptr;
2488 mono_interlocked_unlock ();
2492 return InterlockedRead64 ((volatile gint64 *)ptr);
2496 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2498 return InterlockedReadPointer ((volatile gpointer *)ptr);
2502 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2506 #if SIZEOF_VOID_P == 4
2507 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2509 mono_interlocked_lock ();
2510 val = *(double*)ptr;
2511 mono_interlocked_unlock ();
2516 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2522 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2526 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2532 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2534 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2538 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2540 mono_memory_barrier ();
2541 *(volatile gint8 *)ptr = value;
2545 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2547 mono_memory_barrier ();
2548 *(volatile gint16 *)ptr = value;
2552 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2554 mono_memory_barrier ();
2555 *(volatile gint32 *)ptr = value;
2559 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2561 mono_memory_barrier ();
2562 *(volatile gint64 *)ptr = value;
2566 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2568 mono_memory_barrier ();
2569 *(volatile void **)ptr = value;
2573 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2575 mono_memory_barrier ();
2576 mono_gc_wbarrier_generic_store (ptr, value);
2580 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2582 mono_memory_barrier ();
2583 *(volatile double *)ptr = value;
2587 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2589 mono_memory_barrier ();
2590 *(volatile float *)ptr = value;
2594 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2596 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2600 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2602 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2606 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2608 InterlockedWrite ((volatile gint32 *)ptr, value);
2612 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2614 #if SIZEOF_VOID_P == 4
2615 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2616 mono_interlocked_lock ();
2617 *(gint64*)ptr = value;
2618 mono_interlocked_unlock ();
2623 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2627 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2629 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2633 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2637 #if SIZEOF_VOID_P == 4
2638 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2639 mono_interlocked_lock ();
2640 *(double*)ptr = value;
2641 mono_interlocked_unlock ();
2648 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2652 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2658 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2662 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2664 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2668 free_context (void *user_data)
2670 ContextStaticData *data = user_data;
2672 mono_threads_lock ();
2675 * There is no guarantee that, by the point this reference queue callback
2676 * has been invoked, the GC handle associated with the object will fail to
2677 * resolve as one might expect. So if we don't free and remove the GC
2678 * handle here, free_context_static_data_helper () could end up resolving
2679 * a GC handle to an actually-dead context which would contain a pointer
2680 * to an already-freed static data segment, resulting in a crash when
2683 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2685 mono_threads_unlock ();
2687 mono_gchandle_free (data->gc_handle);
2688 mono_free_static_data (data->static_data);
2693 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2695 mono_threads_lock ();
2697 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2700 contexts = g_hash_table_new (NULL, NULL);
2703 context_queue = mono_gc_reference_queue_new (free_context);
2705 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2706 g_hash_table_insert (contexts, gch, gch);
2709 * We use this intermediate structure to contain a duplicate pointer to
2710 * the static data because we can't rely on being able to resolve the GC
2711 * handle in the reference queue callback.
2713 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2714 data->gc_handle = GPOINTER_TO_UINT (gch);
2717 context_adjust_static_data (ctx);
2718 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2720 mono_threads_unlock ();
2722 mono_profiler_context_loaded (ctx);
2726 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2729 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2730 * cleanup in exceptional circumstances, we don't actually do any
2731 * cleanup work here. We instead do this via a reference queue.
2734 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2736 mono_profiler_context_unloaded (ctx);
2740 mono_thread_init_tls (void)
2742 MONO_FAST_TLS_INIT (tls_current_object);
2743 mono_native_tls_alloc (¤t_object_key, NULL);
2746 void mono_thread_init (MonoThreadStartCB start_cb,
2747 MonoThreadAttachCB attach_cb)
2749 mono_coop_mutex_init_recursive (&threads_mutex);
2751 mono_os_mutex_init_recursive(&interlocked_mutex);
2752 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2754 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2755 g_assert(background_change_event != NULL);
2757 mono_init_static_data_info (&thread_static_info);
2758 mono_init_static_data_info (&context_static_info);
2760 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2762 mono_thread_start_cb = start_cb;
2763 mono_thread_attach_cb = attach_cb;
2765 /* Get a pseudo handle to the current process. This is just a
2766 * kludge so that wapi can build a process handle if needed.
2767 * As a pseudo handle is returned, we don't need to clean
2770 GetCurrentProcess ();
2773 void mono_thread_cleanup (void)
2775 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2776 MonoThreadInfo *info;
2778 /* The main thread must abandon any held mutexes (particularly
2779 * important for named mutexes as they are shared across
2780 * processes, see bug 74680.) This will happen when the
2781 * thread exits, but if it's not running in a subthread it
2782 * won't exit in time.
2784 info = mono_thread_info_current ();
2785 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2789 /* This stuff needs more testing, it seems one of these
2790 * critical sections can be locked when mono_thread_cleanup is
2793 mono_coop_mutex_destroy (&threads_mutex);
2794 mono_os_mutex_destroy (&interlocked_mutex);
2795 mono_os_mutex_destroy (&delayed_free_table_mutex);
2796 mono_os_mutex_destroy (&small_id_mutex);
2797 CloseHandle (background_change_event);
2800 mono_native_tls_free (current_object_key);
2804 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2806 mono_thread_cleanup_fn = func;
2810 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2812 thread->internal_thread->manage_callback = func;
2815 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2817 mono_thread_notify_pending_exc_fn = func;
2821 static void print_tids (gpointer key, gpointer value, gpointer user)
2823 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2824 * sizeof(uint) and a cast to uint would overflow
2826 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2827 * print this as a pointer.
2829 g_message ("Waiting for: %p", key);
2834 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2835 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2839 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2843 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2845 MONO_PREPARE_BLOCKING;
2846 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2847 MONO_FINISH_BLOCKING;
2849 if(ret==WAIT_FAILED) {
2850 /* See the comment in build_wait_tids() */
2851 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2855 for(i=0; i<wait->num; i++)
2856 CloseHandle (wait->handles[i]);
2858 if (ret == WAIT_TIMEOUT)
2861 for(i=0; i<wait->num; i++) {
2862 gsize tid = wait->threads[i]->tid;
2865 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2866 * it can still run io-layer etc. code. So wait for it to really exit.
2867 * FIXME: This won't join threads which are not in the joinable_hash yet.
2869 mono_thread_join ((gpointer)tid);
2871 mono_threads_lock ();
2872 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2873 /* This thread must have been killed, because
2874 * it hasn't cleaned itself up. (It's just
2875 * possible that the thread exited before the
2876 * parent thread had a chance to store the
2877 * handle, and now there is another pointer to
2878 * the already-exited thread stored. In this
2879 * case, we'll just get two
2880 * mono_profiler_thread_end() calls for the
2884 mono_threads_unlock ();
2885 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2886 thread_cleanup (wait->threads[i]);
2888 mono_threads_unlock ();
2893 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2895 guint32 i, ret, count;
2897 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2899 /* Add the thread state change event, so it wakes up if a thread changes
2900 * to background mode.
2903 if (count < MAXIMUM_WAIT_OBJECTS) {
2904 wait->handles [count] = background_change_event;
2908 MONO_PREPARE_BLOCKING;
2909 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2910 MONO_FINISH_BLOCKING;
2912 if(ret==WAIT_FAILED) {
2913 /* See the comment in build_wait_tids() */
2914 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2918 for(i=0; i<wait->num; i++)
2919 CloseHandle (wait->handles[i]);
2921 if (ret == WAIT_TIMEOUT)
2924 if (ret < wait->num) {
2925 gsize tid = wait->threads[ret]->tid;
2926 mono_threads_lock ();
2927 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2928 /* See comment in wait_for_tids about thread cleanup */
2929 mono_threads_unlock ();
2930 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2931 thread_cleanup (wait->threads [ret]);
2933 mono_threads_unlock ();
2937 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2939 struct wait_data *wait=(struct wait_data *)user;
2941 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2943 MonoInternalThread *thread=(MonoInternalThread *)value;
2945 /* Ignore background threads, we abort them later */
2946 /* Do not lock here since it is not needed and the caller holds threads_lock */
2947 if (thread->state & ThreadState_Background) {
2948 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2949 return; /* just leave, ignore */
2952 if (mono_gc_is_finalizer_internal_thread (thread)) {
2953 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2957 if (thread == mono_thread_internal_current ()) {
2958 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2962 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2963 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2967 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2968 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2972 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2973 if (handle == NULL) {
2974 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2978 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2979 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2980 wait->handles[wait->num]=handle;
2981 wait->threads[wait->num]=thread;
2984 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2986 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2991 /* Just ignore the rest, we can't do anything with
2998 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3000 struct wait_data *wait=(struct wait_data *)user;
3001 MonoNativeThreadId self = mono_native_thread_id_get ();
3002 MonoInternalThread *thread = (MonoInternalThread *)value;
3005 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3008 /* The finalizer thread is not a background thread */
3009 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3010 && (thread->state & ThreadState_Background) != 0
3011 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3013 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3017 /* printf ("A: %d\n", wait->num); */
3018 wait->handles[wait->num]=thread->handle;
3019 wait->threads[wait->num]=thread;
3022 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3023 mono_thread_internal_stop (thread);
3027 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3028 && !mono_gc_is_finalizer_internal_thread (thread);
3032 * mono_threads_set_shutting_down:
3034 * Is called by a thread that wants to shut down Mono. If the runtime is already
3035 * shutting down, the calling thread is suspended/stopped, and this function never
3039 mono_threads_set_shutting_down (void)
3041 MonoInternalThread *current_thread = mono_thread_internal_current ();
3043 mono_threads_lock ();
3045 if (shutting_down) {
3046 mono_threads_unlock ();
3048 /* Make sure we're properly suspended/stopped */
3050 LOCK_THREAD (current_thread);
3052 if ((current_thread->state & ThreadState_SuspendRequested) ||
3053 (current_thread->state & ThreadState_AbortRequested) ||
3054 (current_thread->state & ThreadState_StopRequested)) {
3055 UNLOCK_THREAD (current_thread);
3056 mono_thread_execute_interruption ();
3058 current_thread->state |= ThreadState_Stopped;
3059 UNLOCK_THREAD (current_thread);
3062 /*since we're killing the thread, unset the current domain.*/
3063 mono_domain_unset ();
3065 /* Wake up other threads potentially waiting for us */
3066 mono_thread_info_exit ();
3068 shutting_down = TRUE;
3070 /* Not really a background state change, but this will
3071 * interrupt the main thread if it is waiting for all
3072 * the other threads.
3074 SetEvent (background_change_event);
3076 mono_threads_unlock ();
3080 void mono_thread_manage (void)
3082 struct wait_data wait_data;
3083 struct wait_data *wait = &wait_data;
3085 memset (wait, 0, sizeof (struct wait_data));
3086 /* join each thread that's still running */
3087 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3089 mono_threads_lock ();
3091 THREAD_DEBUG (g_message("%s: No threads", __func__));
3092 mono_threads_unlock ();
3095 mono_threads_unlock ();
3098 mono_threads_lock ();
3099 if (shutting_down) {
3100 /* somebody else is shutting down */
3101 mono_threads_unlock ();
3104 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3105 mono_g_hash_table_foreach (threads, print_tids, NULL));
3107 ResetEvent (background_change_event);
3109 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3110 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3111 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3112 mono_threads_unlock ();
3114 /* Something to wait for */
3115 wait_for_tids_or_state_change (wait, INFINITE);
3117 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3118 } while(wait->num>0);
3120 /* Mono is shutting down, so just wait for the end */
3121 if (!mono_runtime_try_shutdown ()) {
3122 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3123 mono_thread_suspend (mono_thread_internal_current ());
3124 mono_thread_execute_interruption ();
3128 * Remove everything but the finalizer thread and self.
3129 * Also abort all the background threads
3132 mono_threads_lock ();
3135 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3136 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3137 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3139 mono_threads_unlock ();
3141 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3143 /* Something to wait for */
3144 wait_for_tids (wait, INFINITE);
3146 } while (wait->num > 0);
3149 * give the subthreads a chance to really quit (this is mainly needed
3150 * to get correct user and system times from getrusage/wait/time(1)).
3151 * This could be removed if we avoid pthread_detach() and use pthread_join().
3153 mono_thread_info_yield ();
3157 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3159 MonoInternalThread *thread = (MonoInternalThread*)value;
3160 struct wait_data *wait = (struct wait_data*)user_data;
3164 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3166 * This needs no locking.
3168 if ((thread->state & ThreadState_Suspended) != 0 ||
3169 (thread->state & ThreadState_Stopped) != 0)
3172 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3173 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3177 wait->handles [wait->num] = handle;
3178 wait->threads [wait->num] = thread;
3184 * mono_thread_suspend_all_other_threads:
3186 * Suspend all managed threads except the finalizer thread and this thread. It is
3187 * not possible to resume them later.
3189 void mono_thread_suspend_all_other_threads (void)
3191 struct wait_data wait_data;
3192 struct wait_data *wait = &wait_data;
3194 MonoNativeThreadId self = mono_native_thread_id_get ();
3195 guint32 eventidx = 0;
3196 gboolean starting, finished;
3198 memset (wait, 0, sizeof (struct wait_data));
3200 * The other threads could be in an arbitrary state at this point, i.e.
3201 * they could be starting up, shutting down etc. This means that there could be
3202 * threads which are not even in the threads hash table yet.
3206 * First we set a barrier which will be checked by all threads before they
3207 * are added to the threads hash table, and they will exit if the flag is set.
3208 * This ensures that no threads could be added to the hash later.
3209 * We will use shutting_down as the barrier for now.
3211 g_assert (shutting_down);
3214 * We make multiple calls to WaitForMultipleObjects since:
3215 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3216 * - some threads could exit without becoming suspended
3221 * Make a copy of the hashtable since we can't do anything with
3222 * threads while threads_mutex is held.
3225 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3226 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3227 mono_threads_lock ();
3228 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3229 mono_threads_unlock ();
3232 /* Get the suspended events that we'll be waiting for */
3233 for (i = 0; i < wait->num; ++i) {
3234 MonoInternalThread *thread = wait->threads [i];
3236 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3237 || mono_gc_is_finalizer_internal_thread (thread)
3238 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3240 //CloseHandle (wait->handles [i]);
3241 wait->threads [i] = NULL; /* ignore this thread in next loop */
3245 LOCK_THREAD (thread);
3247 if ((thread->state & ThreadState_Suspended) != 0 ||
3248 (thread->state & ThreadState_StopRequested) != 0 ||
3249 (thread->state & ThreadState_Stopped) != 0) {
3250 UNLOCK_THREAD (thread);
3251 CloseHandle (wait->handles [i]);
3252 wait->threads [i] = NULL; /* ignore this thread in next loop */
3258 /* Convert abort requests into suspend requests */
3259 if ((thread->state & ThreadState_AbortRequested) != 0)
3260 thread->state &= ~ThreadState_AbortRequested;
3262 thread->state |= ThreadState_SuspendRequested;
3264 UNLOCK_THREAD (thread);
3266 /* Signal the thread to suspend */
3267 suspend_thread_internal (thread, TRUE);
3269 if (eventidx <= 0) {
3271 * If there are threads which are starting up, we wait until they
3272 * are suspended when they try to register in the threads hash.
3273 * This is guaranteed to finish, since the threads which can create new
3274 * threads get suspended after a while.
3275 * FIXME: The finalizer thread can still create new threads.
3277 mono_threads_lock ();
3278 if (threads_starting_up)
3279 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3282 mono_threads_unlock ();
3284 mono_thread_info_sleep (100, NULL);
3292 MonoInternalThread *thread;
3293 MonoStackFrameInfo *frames;
3294 int nframes, max_frames;
3295 int nthreads, max_threads;
3296 MonoInternalThread **threads;
3297 } ThreadDumpUserData;
3299 static gboolean thread_dump_requested;
3301 /* This needs to be async safe */
3303 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3305 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3307 if (ud->nframes < ud->max_frames) {
3308 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3315 /* This needs to be async safe */
3316 static SuspendThreadResult
3317 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3319 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3320 MonoInternalThread *thread = user_data->thread;
3323 /* This no longer works with remote unwinding */
3325 wapi_desc = wapi_current_thread_desc ();
3326 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3331 if (thread == mono_thread_internal_current ())
3332 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3334 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3336 return MonoResumeThread;
3340 int nthreads, max_threads;
3341 MonoInternalThread **threads;
3342 } CollectThreadsUserData;
3345 collect_thread (gpointer key, gpointer value, gpointer user)
3347 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3348 MonoInternalThread *thread = (MonoInternalThread *)value;
3350 if (ud->nthreads < ud->max_threads)
3351 ud->threads [ud->nthreads ++] = thread;
3355 * Collect running threads into the THREADS array.
3356 * THREADS should be an array allocated on the stack.
3359 collect_threads (MonoInternalThread **thread_array, int max_threads)
3361 CollectThreadsUserData ud;
3363 memset (&ud, 0, sizeof (ud));
3364 /* This array contains refs, but its on the stack, so its ok */
3365 ud.threads = thread_array;
3366 ud.max_threads = max_threads;
3368 mono_threads_lock ();
3369 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3370 mono_threads_unlock ();
3376 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3378 GString* text = g_string_new (0);
3380 GError *error = NULL;
3383 ud->thread = thread;
3386 /* Collect frames for the thread */
3387 if (thread == mono_thread_internal_current ()) {
3388 get_thread_dump (mono_thread_info_current (), ud);
3390 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3394 * Do all the non async-safe work outside of get_thread_dump.
3397 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3399 g_string_append_printf (text, "\n\"%s\"", name);
3402 else if (thread->threadpool_thread) {
3403 g_string_append (text, "\n\"<threadpool thread>\"");
3405 g_string_append (text, "\n\"<unnamed thread>\"");
3408 for (i = 0; i < ud->nframes; ++i) {
3409 MonoStackFrameInfo *frame = &ud->frames [i];
3410 MonoMethod *method = NULL;
3412 if (frame->type == FRAME_TYPE_MANAGED)
3413 method = mono_jit_info_get_method (frame->ji);
3416 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3417 g_string_append_printf (text, " %s\n", location);
3420 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3424 fprintf (stdout, "%s", text->str);
3426 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3427 OutputDebugStringA(text->str);
3430 g_string_free (text, TRUE);
3435 mono_threads_perform_thread_dump (void)
3437 ThreadDumpUserData ud;
3438 MonoInternalThread *thread_array [128];
3439 int tindex, nthreads;
3441 if (!thread_dump_requested)
3444 printf ("Full thread dump:\n");
3446 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3447 nthreads = collect_threads (thread_array, 128);
3449 memset (&ud, 0, sizeof (ud));
3450 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3451 ud.max_frames = 256;
3453 for (tindex = 0; tindex < nthreads; ++tindex)
3454 dump_thread (thread_array [tindex], &ud);
3458 thread_dump_requested = FALSE;
3461 /* Obtain the thread dump of all threads */
3463 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3465 ThreadDumpUserData ud;
3466 MonoInternalThread *thread_array [128];
3467 MonoDomain *domain = mono_domain_get ();
3468 MonoDebugSourceLocation *location;
3469 int tindex, nthreads;
3471 *out_threads = NULL;
3472 *out_stack_frames = NULL;
3474 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3475 nthreads = collect_threads (thread_array, 128);
3477 memset (&ud, 0, sizeof (ud));
3478 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3479 ud.max_frames = 256;
3481 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3482 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3484 for (tindex = 0; tindex < nthreads; ++tindex) {
3485 MonoInternalThread *thread = thread_array [tindex];
3486 MonoArray *thread_frames;
3492 /* Collect frames for the thread */
3493 if (thread == mono_thread_internal_current ()) {
3494 get_thread_dump (mono_thread_info_current (), &ud);
3496 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3499 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3501 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3502 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3504 for (i = 0; i < ud.nframes; ++i) {
3505 MonoStackFrameInfo *frame = &ud.frames [i];
3506 MonoMethod *method = NULL;
3507 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
3509 sf->native_offset = frame->native_offset;
3511 if (frame->type == FRAME_TYPE_MANAGED)
3512 method = mono_jit_info_get_method (frame->ji);
3515 sf->method_address = (gsize) frame->ji->code_start;
3517 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3519 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3521 sf->il_offset = location->il_offset;
3523 if (location && location->source_file) {
3524 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3525 sf->line = location->row;
3526 sf->column = location->column;
3528 mono_debug_free_source_location (location);
3533 mono_array_setref (thread_frames, i, sf);
3541 * mono_threads_request_thread_dump:
3543 * Ask all threads except the current to print their stacktrace to stdout.
3546 mono_threads_request_thread_dump (void)
3548 /*The new thread dump code runs out of the finalizer thread. */
3549 thread_dump_requested = TRUE;
3550 mono_gc_finalize_notify ();
3555 gint allocated; /* +1 so that refs [allocated] == NULL */
3559 typedef struct ref_stack RefStack;
3562 ref_stack_new (gint initial_size)
3566 initial_size = MAX (initial_size, 16) + 1;
3567 rs = g_new0 (RefStack, 1);
3568 rs->refs = g_new0 (gpointer, initial_size);
3569 rs->allocated = initial_size;
3574 ref_stack_destroy (gpointer ptr)
3576 RefStack *rs = (RefStack *)ptr;
3585 ref_stack_push (RefStack *rs, gpointer ptr)
3587 g_assert (rs != NULL);
3589 if (rs->bottom >= rs->allocated) {
3590 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3591 rs->allocated <<= 1;
3592 rs->refs [rs->allocated] = NULL;
3594 rs->refs [rs->bottom++] = ptr;
3598 ref_stack_pop (RefStack *rs)
3600 if (rs == NULL || rs->bottom == 0)
3604 rs->refs [rs->bottom] = NULL;
3608 ref_stack_find (RefStack *rs, gpointer ptr)
3615 for (refs = rs->refs; refs && *refs; refs++) {
3623 * mono_thread_push_appdomain_ref:
3625 * Register that the current thread may have references to objects in domain
3626 * @domain on its stack. Each call to this function should be paired with a
3627 * call to pop_appdomain_ref.
3630 mono_thread_push_appdomain_ref (MonoDomain *domain)
3632 MonoInternalThread *thread = mono_thread_internal_current ();
3635 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3636 SPIN_LOCK (thread->lock_thread_id);
3637 if (thread->appdomain_refs == NULL)
3638 thread->appdomain_refs = ref_stack_new (16);
3639 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3640 SPIN_UNLOCK (thread->lock_thread_id);
3645 mono_thread_pop_appdomain_ref (void)
3647 MonoInternalThread *thread = mono_thread_internal_current ();
3650 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3651 SPIN_LOCK (thread->lock_thread_id);
3652 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3653 SPIN_UNLOCK (thread->lock_thread_id);
3658 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3661 SPIN_LOCK (thread->lock_thread_id);
3662 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3663 SPIN_UNLOCK (thread->lock_thread_id);
3668 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3670 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3673 typedef struct abort_appdomain_data {
3674 struct wait_data wait;
3676 } abort_appdomain_data;
3679 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3681 MonoInternalThread *thread = (MonoInternalThread*)value;
3682 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3683 MonoDomain *domain = data->domain;
3685 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3686 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3688 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3689 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3692 data->wait.handles [data->wait.num] = handle;
3693 data->wait.threads [data->wait.num] = thread;
3696 /* Just ignore the rest, we can't do anything with
3704 * mono_threads_abort_appdomain_threads:
3706 * Abort threads which has references to the given appdomain.
3709 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3711 #ifdef __native_client__
3715 abort_appdomain_data user_data;
3717 int orig_timeout = timeout;
3720 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3722 start_time = mono_msec_ticks ();
3724 mono_threads_lock ();
3726 user_data.domain = domain;
3727 user_data.wait.num = 0;
3728 /* This shouldn't take any locks */
3729 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3730 mono_threads_unlock ();
3732 if (user_data.wait.num > 0) {
3733 /* Abort the threads outside the threads lock */
3734 for (i = 0; i < user_data.wait.num; ++i)
3735 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3738 * We should wait for the threads either to abort, or to leave the
3739 * domain. We can't do the latter, so we wait with a timeout.
3741 wait_for_tids (&user_data.wait, 100);
3744 /* Update remaining time */
3745 timeout -= mono_msec_ticks () - start_time;
3746 start_time = mono_msec_ticks ();
3748 if (orig_timeout != -1 && timeout < 0)
3751 while (user_data.wait.num > 0);
3753 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3759 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3761 MonoInternalThread *thread = (MonoInternalThread*)value;
3762 MonoDomain *domain = (MonoDomain*)user_data;
3765 /* No locking needed here */
3766 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3768 if (thread->cached_culture_info) {
3769 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3770 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3771 if (obj && obj->vtable->domain == domain)
3772 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3778 * mono_threads_clear_cached_culture:
3780 * Clear the cached_current_culture from all threads if it is in the
3784 mono_threads_clear_cached_culture (MonoDomain *domain)
3786 mono_threads_lock ();
3787 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3788 mono_threads_unlock ();
3792 * mono_thread_get_undeniable_exception:
3794 * Return an exception which needs to be raised when leaving a catch clause.
3795 * This is used for undeniable exception propagation.
3798 mono_thread_get_undeniable_exception (void)
3800 MonoInternalThread *thread = mono_thread_internal_current ();
3802 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3804 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3805 * exception if the thread no longer references a dying appdomain.
3807 thread->abort_exc->trace_ips = NULL;
3808 thread->abort_exc->stack_trace = NULL;
3809 return thread->abort_exc;
3815 #if MONO_SMALL_CONFIG
3816 #define NUM_STATIC_DATA_IDX 4
3817 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3821 #define NUM_STATIC_DATA_IDX 8
3822 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3823 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3827 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3828 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3831 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3833 gpointer *static_data = (gpointer *)addr;
3835 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3836 void **ptr = (void **)static_data [i];
3841 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3842 void **p = ptr + idx;
3845 mark_func ((MonoObject**)p, gc_data);
3851 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3853 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3857 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3859 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3863 * mono_alloc_static_data
3865 * Allocate memory blocks for storing threads or context static data
3868 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3870 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3873 gpointer* static_data = *static_data_ptr;
3875 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3876 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3878 if (mono_gc_user_markers_supported ()) {
3879 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3880 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3882 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3883 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3886 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3887 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3888 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3889 *static_data_ptr = static_data;
3890 static_data [0] = static_data;
3893 for (i = 1; i <= idx; ++i) {
3894 if (static_data [i])
3897 if (mono_gc_user_markers_supported ())
3898 static_data [i] = g_malloc0 (static_data_size [i]);
3900 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3901 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3902 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3907 mono_free_static_data (gpointer* static_data)
3910 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3911 gpointer p = static_data [i];
3915 * At this point, the static data pointer array is still registered with the
3916 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3917 * data. Freeing the individual arrays without first nulling their slots
3918 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3919 * such an already freed array. See bug #13813.
3921 static_data [i] = NULL;
3922 mono_memory_write_barrier ();
3923 if (mono_gc_user_markers_supported ())
3926 mono_gc_free_fixed (p);
3928 mono_gc_free_fixed (static_data);
3932 * mono_init_static_data_info
3934 * Initializes static data counters
3936 static void mono_init_static_data_info (StaticDataInfo *static_data)
3938 static_data->idx = 0;
3939 static_data->offset = 0;
3940 static_data->freelist = NULL;
3944 * mono_alloc_static_data_slot
3946 * Generates an offset for static data. static_data contains the counters
3947 * used to generate it.
3950 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3952 if (!static_data->idx && !static_data->offset) {
3954 * we use the first chunk of the first allocation also as
3955 * an array for the rest of the data
3957 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3959 static_data->offset += align - 1;
3960 static_data->offset &= ~(align - 1);
3961 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3962 static_data->idx ++;
3963 g_assert (size <= static_data_size [static_data->idx]);
3964 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3965 static_data->offset = 0;
3967 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
3968 static_data->offset += size;
3973 * ensure thread static fields already allocated are valid for thread
3974 * This function is called when a thread is created or on thread attach.
3977 thread_adjust_static_data (MonoInternalThread *thread)
3979 mono_threads_lock ();
3980 if (thread_static_info.offset || thread_static_info.idx > 0) {
3981 /* get the current allocated size */
3982 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
3983 mono_alloc_static_data (&thread->static_data, offset, TRUE);
3985 mono_threads_unlock ();
3989 * LOCKING: requires that threads_mutex is held
3992 context_adjust_static_data (MonoAppContext *ctx)
3994 if (context_static_info.offset || context_static_info.idx > 0) {
3995 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
3996 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3997 ctx->data->static_data = ctx->static_data;
4002 * LOCKING: requires that threads_mutex is held
4005 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4007 MonoInternalThread *thread = (MonoInternalThread *)value;
4008 guint32 offset = GPOINTER_TO_UINT (user);
4010 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4014 * LOCKING: requires that threads_mutex is held
4017 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4019 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4024 guint32 offset = GPOINTER_TO_UINT (user);
4025 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4026 ctx->data->static_data = ctx->static_data;
4029 static StaticDataFreeList*
4030 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4032 StaticDataFreeList* prev = NULL;
4033 StaticDataFreeList* tmp = static_data->freelist;
4035 if (tmp->size == size) {
4037 prev->next = tmp->next;
4039 static_data->freelist = tmp->next;
4048 #if SIZEOF_VOID_P == 4
4055 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4057 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4059 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4060 MonoBitSet *rb = sets [idx];
4061 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4062 offset /= sizeof (uintptr_t);
4063 /* offset is now the bitmap offset */
4064 for (int i = 0; i < numbits; ++i) {
4065 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4066 mono_bitset_set_fast (rb, offset + i);
4071 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4073 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4074 MonoBitSet *rb = sets [idx];
4075 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4076 offset /= sizeof (uintptr_t);
4077 /* offset is now the bitmap offset */
4078 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4079 mono_bitset_clear_fast (rb, offset + i);
4083 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4085 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4087 StaticDataInfo *info;
4090 if (static_type == SPECIAL_STATIC_THREAD) {
4091 info = &thread_static_info;
4092 sets = thread_reference_bitmaps;
4094 info = &context_static_info;
4095 sets = context_reference_bitmaps;
4098 mono_threads_lock ();
4100 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4104 offset = item->offset;
4107 offset = mono_alloc_static_data_slot (info, size, align);
4110 update_reference_bitmap (sets, offset, bitmap, numbits);
4112 if (static_type == SPECIAL_STATIC_THREAD) {
4113 /* This can be called during startup */
4114 if (threads != NULL)
4115 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4117 if (contexts != NULL)
4118 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4120 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4123 mono_threads_unlock ();
4129 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4131 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4133 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4134 return get_thread_static_data (thread, offset);
4136 return get_context_static_data (thread->current_appcontext, offset);
4141 mono_get_special_static_data (guint32 offset)
4143 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4152 * LOCKING: requires that threads_mutex is held
4155 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4157 MonoInternalThread *thread = (MonoInternalThread *)value;
4158 OffsetSize *data = (OffsetSize *)user;
4159 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4160 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4163 if (!thread->static_data || !thread->static_data [idx])
4165 ptr = ((char*) thread->static_data [idx]) + off;
4166 mono_gc_bzero_atomic (ptr, data->size);
4170 * LOCKING: requires that threads_mutex is held
4173 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4175 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4180 OffsetSize *data = (OffsetSize *)user;
4181 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4182 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4185 if (!ctx->static_data || !ctx->static_data [idx])
4188 ptr = ((char*) ctx->static_data [idx]) + off;
4189 mono_gc_bzero_atomic (ptr, data->size);
4193 do_free_special_slot (guint32 offset, guint32 size)
4195 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4197 StaticDataInfo *info;
4199 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4200 info = &thread_static_info;
4201 sets = thread_reference_bitmaps;
4203 info = &context_static_info;
4204 sets = context_reference_bitmaps;
4207 guint32 data_offset = offset;
4208 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4209 OffsetSize data = { data_offset, size };
4211 clear_reference_bitmap (sets, data.offset, data.size);
4213 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4214 if (threads != NULL)
4215 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4217 if (contexts != NULL)
4218 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4221 if (!mono_runtime_is_shutting_down ()) {
4222 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4224 item->offset = offset;
4227 item->next = info->freelist;
4228 info->freelist = item;
4233 do_free_special (gpointer key, gpointer value, gpointer data)
4235 MonoClassField *field = (MonoClassField *)key;
4236 guint32 offset = GPOINTER_TO_UINT (value);
4239 size = mono_type_size (field->type, &align);
4240 do_free_special_slot (offset, size);
4244 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4246 mono_threads_lock ();
4248 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4250 mono_threads_unlock ();
4254 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4256 /* Only ever called for ThreadLocal instances */
4257 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4259 mono_threads_lock ();
4260 do_free_special_slot (offset, size);
4261 mono_threads_unlock ();
4265 static void CALLBACK dummy_apc (ULONG_PTR param)
4271 * mono_thread_execute_interruption
4273 * Performs the operation that the requested thread state requires (abort,
4276 static MonoException*
4277 mono_thread_execute_interruption (void)
4279 MonoInternalThread *thread = mono_thread_internal_current ();
4281 LOCK_THREAD (thread);
4283 /* MonoThread::interruption_requested can only be changed with atomics */
4284 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4285 /* this will consume pending APC calls */
4287 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4289 InterlockedDecrement (&thread_interruption_requested);
4291 /* Clear the interrupted flag of the thread so it can wait again */
4292 mono_thread_info_clear_self_interrupt ();
4295 if ((thread->state & ThreadState_AbortRequested) != 0) {
4296 UNLOCK_THREAD (thread);
4297 if (thread->abort_exc == NULL) {
4299 * This might be racy, but it has to be called outside the lock
4300 * since it calls managed code.
4302 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4304 return thread->abort_exc;
4306 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4307 self_suspend_internal (thread);
4310 else if ((thread->state & ThreadState_StopRequested) != 0) {
4311 /* FIXME: do this through the JIT? */
4313 UNLOCK_THREAD (thread);
4315 mono_thread_exit ();
4317 } else if (thread->pending_exception) {
4320 exc = thread->pending_exception;
4321 thread->pending_exception = NULL;
4323 UNLOCK_THREAD (thread);
4325 } else if (thread->thread_interrupt_requested) {
4327 thread->thread_interrupt_requested = FALSE;
4328 UNLOCK_THREAD (thread);
4330 return(mono_get_exception_thread_interrupted ());
4333 UNLOCK_THREAD (thread);
4339 * mono_thread_request_interruption
4341 * A signal handler can call this method to request the interruption of a
4342 * thread. The result of the interruption will depend on the current state of
4343 * the thread. If the result is an exception that needs to be throw, it is
4344 * provided as return value.
4347 mono_thread_request_interruption (gboolean running_managed)
4349 MonoInternalThread *thread = mono_thread_internal_current ();
4351 /* The thread may already be stopping */
4356 if (thread->interrupt_on_stop &&
4357 thread->state & ThreadState_StopRequested &&
4358 thread->state & ThreadState_Background)
4362 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4364 InterlockedIncrement (&thread_interruption_requested);
4366 if (!running_managed || is_running_protected_wrapper ()) {
4367 /* Can't stop while in unmanaged code. Increase the global interruption
4368 request count. When exiting the unmanaged method the count will be
4369 checked and the thread will be interrupted. */
4371 if (mono_thread_notify_pending_exc_fn && !running_managed)
4372 /* The JIT will notify the thread about the interruption */
4373 /* This shouldn't take any locks */
4374 mono_thread_notify_pending_exc_fn (NULL);
4376 /* this will awake the thread if it is in WaitForSingleObject
4378 /* Our implementation of this function ignores the func argument */
4380 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4382 mono_thread_info_self_interrupt ();
4387 return mono_thread_execute_interruption ();
4391 /*This function should be called by a thread after it has exited all of
4392 * its handle blocks at interruption time.*/
4394 mono_thread_resume_interruption (void)
4396 MonoInternalThread *thread = mono_thread_internal_current ();
4397 gboolean still_aborting;
4399 /* The thread may already be stopping */
4403 LOCK_THREAD (thread);
4404 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4405 UNLOCK_THREAD (thread);
4407 /*This can happen if the protected block called Thread::ResetAbort*/
4408 if (!still_aborting)
4411 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4413 InterlockedIncrement (&thread_interruption_requested);
4415 mono_thread_info_self_interrupt ();
4417 return mono_thread_execute_interruption ();
4420 gboolean mono_thread_interruption_requested ()
4422 if (thread_interruption_requested) {
4423 MonoInternalThread *thread = mono_thread_internal_current ();
4424 /* The thread may already be stopping */
4426 return (thread->interruption_requested);
4431 static MonoException*
4432 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4434 MonoInternalThread *thread = mono_thread_internal_current ();
4436 /* The thread may already be stopping */
4440 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4441 MonoException* exc = mono_thread_execute_interruption ();
4449 * Performs the interruption of the current thread, if one has been requested,
4450 * and the thread is not running a protected wrapper.
4451 * Return the exception which needs to be thrown, if any.
4454 mono_thread_interruption_checkpoint (void)
4456 return mono_thread_interruption_checkpoint_request (FALSE);
4460 * Performs the interruption of the current thread, if one has been requested.
4461 * Return the exception which needs to be thrown, if any.
4464 mono_thread_force_interruption_checkpoint_noraise (void)
4466 return mono_thread_interruption_checkpoint_request (TRUE);
4470 * Performs the interruption of the current thread, if one has been requested.
4471 * Throw the exception which needs to be thrown, if any.
4474 mono_thread_force_interruption_checkpoint (void)
4478 ex = mono_thread_interruption_checkpoint_request (TRUE);
4480 mono_raise_exception (ex);
4484 * mono_thread_get_and_clear_pending_exception:
4486 * Return any pending exceptions for the current thread and clear it as a side effect.
4489 mono_thread_get_and_clear_pending_exception (void)
4491 MonoInternalThread *thread = mono_thread_internal_current ();
4493 /* The thread may already be stopping */
4497 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4498 return mono_thread_execute_interruption ();
4501 if (thread->pending_exception) {
4502 MonoException *exc = thread->pending_exception;
4504 thread->pending_exception = NULL;
4512 * mono_set_pending_exception:
4514 * Set the pending exception of the current thread to EXC.
4515 * The exception will be thrown when execution returns to managed code.
4518 mono_set_pending_exception (MonoException *exc)
4520 MonoInternalThread *thread = mono_thread_internal_current ();
4522 /* The thread may already be stopping */
4526 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4528 mono_thread_request_interruption (FALSE);
4532 * mono_thread_interruption_request_flag:
4534 * Returns the address of a flag that will be non-zero if an interruption has
4535 * been requested for a thread. The thread to interrupt may not be the current
4536 * thread, so an additional call to mono_thread_interruption_requested() or
4537 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4540 gint32* mono_thread_interruption_request_flag ()
4542 return &thread_interruption_requested;
4546 mono_thread_init_apartment_state (void)
4549 MonoInternalThread* thread = mono_thread_internal_current ();
4551 /* Positive return value indicates success, either
4552 * S_OK if this is first CoInitialize call, or
4553 * S_FALSE if CoInitialize already called, but with same
4554 * threading model. A negative value indicates failure,
4555 * probably due to trying to change the threading model.
4557 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4558 ? COINIT_APARTMENTTHREADED
4559 : COINIT_MULTITHREADED) < 0) {
4560 thread->apartment_state = ThreadApartmentState_Unknown;
4566 mono_thread_cleanup_apartment_state (void)
4569 MonoInternalThread* thread = mono_thread_internal_current ();
4571 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4578 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4580 LOCK_THREAD (thread);
4581 thread->state |= state;
4582 UNLOCK_THREAD (thread);
4586 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4588 LOCK_THREAD (thread);
4589 thread->state &= ~state;
4590 UNLOCK_THREAD (thread);
4594 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4596 gboolean ret = FALSE;
4598 LOCK_THREAD (thread);
4600 if ((thread->state & test) != 0) {
4604 UNLOCK_THREAD (thread);
4609 static gboolean has_tls_get = FALSE;
4612 mono_runtime_set_has_tls_get (gboolean val)
4618 mono_runtime_has_tls_get (void)
4624 self_interrupt_thread (void *_unused)
4626 MonoThreadInfo *info = mono_thread_info_current ();
4627 MonoException *exc = mono_thread_execute_interruption ();
4628 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4629 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. */
4630 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4634 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4638 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4642 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4644 MonoJitInfo **dest = (MonoJitInfo **)data;
4650 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4652 MonoJitInfo *ji = NULL;
4655 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4660 MonoInternalThread *thread;
4661 gboolean install_async_abort;
4662 MonoThreadInfoInterruptToken *interrupt_token;
4665 static SuspendThreadResult
4666 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4668 AbortThreadData *data = (AbortThreadData *)ud;
4669 MonoInternalThread *thread = data->thread;
4670 MonoJitInfo *ji = NULL;
4671 gboolean protected_wrapper;
4672 gboolean running_managed;
4674 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4675 return MonoResumeThread;
4677 /*someone is already interrupting it*/
4678 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4679 return MonoResumeThread;
4681 InterlockedIncrement (&thread_interruption_requested);
4683 ji = mono_thread_info_get_last_managed (info);
4684 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4685 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4687 if (!protected_wrapper && running_managed) {
4688 /*We are in managed code*/
4689 /*Set the thread to call */
4690 if (data->install_async_abort)
4691 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4692 return MonoResumeThread;
4694 if (mono_thread_notify_pending_exc_fn)
4695 /* The JIT will notify the thread about the interruption */
4696 mono_thread_notify_pending_exc_fn (info);
4699 * This will cause waits to be broken.
4700 * It will also prevent the thread from entering a wait, so if the thread returns
4701 * from the wait before it receives the abort signal, it will just spin in the wait
4702 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4705 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4707 return MonoResumeThread;
4712 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4714 AbortThreadData data = { 0 };
4715 data.thread = thread;
4716 data.install_async_abort = install_async_abort;
4719 FIXME this is insanely broken, it doesn't cause interruption to happen
4720 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4722 if (thread == mono_thread_internal_current ()) {
4723 /* Do it synchronously */
4724 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4726 mono_raise_exception (exc);
4728 mono_thread_info_self_interrupt ();
4733 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4734 if (data.interrupt_token)
4735 mono_thread_info_finish_interrupt (data.interrupt_token);
4736 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4740 MonoInternalThread *thread;
4742 MonoThreadInfoInterruptToken *interrupt_token;
4743 } SuspendThreadData;
4745 static SuspendThreadResult
4746 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4748 SuspendThreadData *data = (SuspendThreadData *)ud;
4749 MonoInternalThread *thread = data->thread;
4750 MonoJitInfo *ji = NULL;
4751 gboolean protected_wrapper;
4752 gboolean running_managed;
4754 ji = mono_thread_info_get_last_managed (info);
4755 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4756 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4758 if (running_managed && !protected_wrapper) {
4759 thread->state &= ~ThreadState_SuspendRequested;
4760 thread->state |= ThreadState_Suspended;
4761 return KeepSuspended;
4763 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4764 InterlockedIncrement (&thread_interruption_requested);
4765 if (data->interrupt)
4766 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4768 if (mono_thread_notify_pending_exc_fn && !running_managed)
4769 /* The JIT will notify the thread about the interruption */
4770 mono_thread_notify_pending_exc_fn (info);
4771 return MonoResumeThread;
4776 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4778 LOCK_THREAD (thread);
4779 if (thread == mono_thread_internal_current ()) {
4780 mono_thread_info_begin_self_suspend ();
4781 //XXX replace this with better named functions
4782 thread->state &= ~ThreadState_SuspendRequested;
4783 thread->state |= ThreadState_Suspended;
4784 UNLOCK_THREAD (thread);
4785 mono_thread_info_end_self_suspend ();
4787 SuspendThreadData data = { 0 };
4788 data.thread = thread;
4789 data.interrupt = interrupt;
4791 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4792 if (data.interrupt_token)
4793 mono_thread_info_finish_interrupt (data.interrupt_token);
4794 UNLOCK_THREAD (thread);
4798 /*This is called with @thread synch_cs held and it must release it*/
4800 self_suspend_internal (MonoInternalThread *thread)
4802 mono_thread_info_begin_self_suspend ();
4803 thread->state &= ~ThreadState_SuspendRequested;
4804 thread->state |= ThreadState_Suspended;
4805 UNLOCK_THREAD (thread);
4806 mono_thread_info_end_self_suspend ();
4811 * mono_thread_is_foreign:
4812 * @thread: the thread to query
4814 * This function allows one to determine if a thread was created by the mono runtime and has
4815 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4817 * Returns: true if @thread was not created by the runtime.
4820 mono_thread_is_foreign (MonoThread *thread)
4822 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4823 return info->runtime_thread == FALSE;
4827 * mono_add_joinable_thread:
4829 * Add TID to the list of joinable threads.
4830 * LOCKING: Acquires the threads lock.
4833 mono_threads_add_joinable_thread (gpointer tid)
4837 * We cannot detach from threads because it causes problems like
4838 * 2fd16f60/r114307. So we collect them and join them when
4839 * we have time (in he finalizer thread).
4841 joinable_threads_lock ();
4842 if (!joinable_threads)
4843 joinable_threads = g_hash_table_new (NULL, NULL);
4844 g_hash_table_insert (joinable_threads, tid, tid);
4845 joinable_thread_count ++;
4846 joinable_threads_unlock ();
4848 mono_gc_finalize_notify ();
4853 * mono_threads_join_threads:
4855 * Join all joinable threads. This is called from the finalizer thread.
4856 * LOCKING: Acquires the threads lock.
4859 mono_threads_join_threads (void)
4862 GHashTableIter iter;
4869 if (!joinable_thread_count)
4873 joinable_threads_lock ();
4875 if (g_hash_table_size (joinable_threads)) {
4876 g_hash_table_iter_init (&iter, joinable_threads);
4877 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4878 thread = (pthread_t)tid;
4879 g_hash_table_remove (joinable_threads, key);
4880 joinable_thread_count --;
4883 joinable_threads_unlock ();
4885 if (thread != pthread_self ())
4886 /* This shouldn't block */
4887 pthread_join (thread, NULL);
4898 * Wait for thread TID to exit.
4899 * LOCKING: Acquires the threads lock.
4902 mono_thread_join (gpointer tid)
4906 gboolean found = FALSE;
4908 joinable_threads_lock ();
4909 if (!joinable_threads)
4910 joinable_threads = g_hash_table_new (NULL, NULL);
4911 if (g_hash_table_lookup (joinable_threads, tid)) {
4912 g_hash_table_remove (joinable_threads, tid);
4913 joinable_thread_count --;
4916 joinable_threads_unlock ();
4919 thread = (pthread_t)tid;
4920 pthread_join (thread, NULL);
4925 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4927 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4928 mono_thread_interruption_checkpoint ();
4931 static inline gboolean
4932 is_appdomainunloaded_exception (MonoClass *klass)
4934 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4936 if (!app_domain_unloaded_exception_klass)
4937 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4938 g_assert (app_domain_unloaded_exception_klass);
4940 return klass == app_domain_unloaded_exception_klass;
4943 static inline gboolean
4944 is_threadabort_exception (MonoClass *klass)
4946 return klass == mono_defaults.threadabortexception_class;
4950 mono_thread_internal_unhandled_exception (MonoObject* exc)
4952 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4953 MonoClass *klass = exc->vtable->klass;
4954 if (is_threadabort_exception (klass)) {
4955 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4956 } else if (!is_appdomainunloaded_exception (klass)) {
4957 mono_unhandled_exception (exc);
4958 if (mono_environment_exitcode_get () == 1)
4965 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4967 mono_threads_get_thread_dump (out_threads, out_stack_traces);