2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/io-layer/io-layer.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/mono-debug-debugger.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
45 #include <mono/metadata/gc-internals.h>
46 #include <mono/metadata/reflection-internals.h>
52 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
53 #define USE_TKILL_ON_ANDROID 1
56 #ifdef PLATFORM_ANDROID
59 #ifdef USE_TKILL_ON_ANDROID
60 extern int tkill (pid_t tid, int signal);
64 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_DEBUG(a)
66 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
67 #define THREAD_WAIT_DEBUG(a)
68 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
69 #define LIBGC_DEBUG(a)
71 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
72 #define SPIN_LOCK(i) do { \
73 if (SPIN_TRYLOCK (i)) \
77 #define SPIN_UNLOCK(i) i = 0
79 #define LOCK_THREAD(thread) lock_thread((thread))
80 #define UNLOCK_THREAD(thread) unlock_thread((thread))
82 /* Provide this for systems with glib < 2.6 */
83 #ifndef G_GSIZE_FORMAT
84 # if GLIB_SIZEOF_LONG == 8
85 # define G_GSIZE_FORMAT "lu"
87 # define G_GSIZE_FORMAT "u"
93 guint32 (*func)(void *);
109 typedef struct _StaticDataFreeList StaticDataFreeList;
110 struct _StaticDataFreeList {
111 StaticDataFreeList *next;
119 StaticDataFreeList *freelist;
122 /* Number of cached culture objects in the MonoThread->cached_culture_info array
123 * (per-type): we use the first NUM entries for CultureInfo and the last for
124 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
126 #define NUM_CACHED_CULTURES 4
127 #define CULTURES_START_IDX 0
128 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
130 /* Controls access to the 'threads' hash table */
131 static void mono_threads_lock (void);
132 static void mono_threads_unlock (void);
133 static MonoCoopMutex threads_mutex;
135 /* Controls access to the 'joinable_threads' hash table */
136 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
137 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
138 static mono_mutex_t joinable_threads_mutex;
140 /* Holds current status of static data heap */
141 static StaticDataInfo thread_static_info;
142 static StaticDataInfo context_static_info;
144 /* The hash of existing threads (key is thread ID, value is
145 * MonoInternalThread*) that need joining before exit
147 static MonoGHashTable *threads=NULL;
149 /* List of app context GC handles.
150 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
152 static GHashTable *contexts = NULL;
154 /* Cleanup queue for contexts. */
155 static MonoReferenceQueue *context_queue;
158 * Threads which are starting up and they are not in the 'threads' hash yet.
159 * When handle_store is called for a thread, it will be removed from this hash table.
160 * Protected by mono_threads_lock ().
162 static MonoGHashTable *threads_starting_up = NULL;
164 /* The TLS key that holds the MonoObject assigned to each thread */
165 static MonoNativeTlsKey current_object_key;
168 /* Protected by the threads lock */
169 static GHashTable *joinable_threads;
170 static int joinable_thread_count;
172 #ifdef MONO_HAVE_FAST_TLS
173 /* we need to use both the Tls* functions and __thread because
174 * the gc needs to see all the threads
176 MONO_FAST_TLS_DECLARE(tls_current_object);
177 #define SET_CURRENT_OBJECT(x) do { \
178 MONO_FAST_TLS_SET (tls_current_object, x); \
179 mono_native_tls_set_value (current_object_key, x); \
181 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
183 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
184 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
187 /* function called at thread start */
188 static MonoThreadStartCB mono_thread_start_cb = NULL;
190 /* function called at thread attach */
191 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
193 /* function called at thread cleanup */
194 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
196 /* The default stack size for each thread */
197 static guint32 default_stacksize = 0;
198 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
200 static void thread_adjust_static_data (MonoInternalThread *thread);
201 static void context_adjust_static_data (MonoAppContext *ctx);
202 static void mono_free_static_data (gpointer* static_data);
203 static void mono_init_static_data_info (StaticDataInfo *static_data);
204 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
205 static gboolean mono_thread_resume (MonoInternalThread* thread);
206 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
207 static void self_abort_internal (void);
208 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
209 static void self_suspend_internal (void);
211 static MonoException* mono_thread_execute_interruption (void);
212 static void ref_stack_destroy (gpointer rs);
214 /* Spin lock for InterlockedXXX 64 bit functions */
215 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
216 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
217 static mono_mutex_t interlocked_mutex;
219 /* global count of thread interruptions requested */
220 static gint32 thread_interruption_requested = 0;
222 /* Event signaled when a thread changes its background mode */
223 static HANDLE background_change_event;
225 static gboolean shutting_down = FALSE;
227 static gint32 managed_thread_id_counter = 0;
229 /* Class lazy loading functions */
230 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
233 mono_threads_lock (void)
235 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
239 mono_threads_unlock (void)
241 mono_locks_coop_release (&threads_mutex, ThreadsLock);
246 get_next_managed_thread_id (void)
248 return InterlockedIncrement (&managed_thread_id_counter);
252 mono_thread_get_tls_key (void)
254 return current_object_key;
258 mono_thread_get_tls_offset (void)
261 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
265 static inline MonoNativeThreadId
266 thread_get_tid (MonoInternalThread *thread)
268 /* We store the tid as a guint64 to keep the object layout constant between platforms */
269 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
272 /* handle_store() and handle_remove() manage the array of threads that
273 * still need to be waited for when the main thread exits.
275 * If handle_store() returns FALSE the thread must not be started
276 * because Mono is shutting down.
278 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
280 mono_threads_lock ();
282 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
284 if (threads_starting_up)
285 mono_g_hash_table_remove (threads_starting_up, thread);
287 if (shutting_down && !force_attach) {
288 mono_threads_unlock ();
293 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
294 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
297 /* We don't need to duplicate thread->handle, because it is
298 * only closed when the thread object is finalized by the GC.
300 g_assert (thread->internal_thread);
301 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
302 thread->internal_thread);
304 mono_threads_unlock ();
309 static gboolean handle_remove(MonoInternalThread *thread)
312 gsize tid = thread->tid;
314 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
316 mono_threads_lock ();
319 /* We have to check whether the thread object for the
320 * tid is still the same in the table because the
321 * thread might have been destroyed and the tid reused
322 * in the meantime, in which case the tid would be in
323 * the table, but with another thread object.
325 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
326 mono_g_hash_table_remove (threads, (gpointer)tid);
335 mono_threads_unlock ();
337 /* Don't close the handle here, wait for the object finalizer
338 * to do it. Otherwise, the following race condition applies:
340 * 1) Thread exits (and handle_remove() closes the handle)
342 * 2) Some other handle is reassigned the same slot
344 * 3) Another thread tries to join the first thread, and
345 * blocks waiting for the reassigned handle to be signalled
346 * (which might never happen). This is possible, because the
347 * thread calling Join() still has a reference to the first
353 static void ensure_synch_cs_set (MonoInternalThread *thread)
355 MonoCoopMutex *synch_cs;
357 if (thread->synch_cs != NULL) {
361 synch_cs = g_new0 (MonoCoopMutex, 1);
362 mono_coop_mutex_init_recursive (synch_cs);
364 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
365 synch_cs, NULL) != NULL) {
366 /* Another thread must have installed this CS */
367 mono_coop_mutex_destroy (synch_cs);
373 lock_thread (MonoInternalThread *thread)
375 if (!thread->synch_cs)
376 ensure_synch_cs_set (thread);
378 g_assert (thread->synch_cs);
380 mono_coop_mutex_lock (thread->synch_cs);
384 unlock_thread (MonoInternalThread *thread)
386 mono_coop_mutex_unlock (thread->synch_cs);
390 * NOTE: this function can be called also for threads different from the current one:
391 * make sure no code called from it will ever assume it is run on the thread that is
392 * getting cleaned up.
394 static void thread_cleanup (MonoInternalThread *thread)
396 g_assert (thread != NULL);
398 if (thread->abort_state_handle) {
399 mono_gchandle_free (thread->abort_state_handle);
400 thread->abort_state_handle = 0;
402 thread->abort_exc = NULL;
403 thread->current_appcontext = NULL;
406 * This is necessary because otherwise we might have
407 * cross-domain references which will not get cleaned up when
408 * the target domain is unloaded.
410 if (thread->cached_culture_info) {
412 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
413 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
417 * thread->synch_cs can be NULL if this was called after
418 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
419 * This can happen only during shutdown.
420 * The shutting_down flag is not always set, so we can't assert on it.
422 if (thread->synch_cs)
423 LOCK_THREAD (thread);
425 thread->state |= ThreadState_Stopped;
426 thread->state &= ~ThreadState_Background;
428 if (thread->synch_cs)
429 UNLOCK_THREAD (thread);
432 An interruption request has leaked to cleanup. Adjust the global counter.
434 This can happen is the abort source thread finds the abortee (this) thread
435 in unmanaged code. If this thread never trips back to managed code or check
436 the local flag it will be left set and positively unbalance the global counter.
438 Leaving the counter unbalanced will cause a performance degradation since all threads
439 will now keep checking their local flags all the time.
441 if (InterlockedExchange (&thread->interruption_requested, 0))
442 InterlockedDecrement (&thread_interruption_requested);
444 /* if the thread is not in the hash it has been removed already */
445 if (!handle_remove (thread)) {
446 if (thread == mono_thread_internal_current ()) {
447 mono_domain_unset ();
448 mono_memory_barrier ();
450 /* This needs to be called even if handle_remove () fails */
451 if (mono_thread_cleanup_fn)
452 mono_thread_cleanup_fn (thread_get_tid (thread));
455 mono_release_type_locks (thread);
457 /* Can happen when we attach the profiler helper thread in order to heapshot. */
458 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
459 mono_profiler_thread_end (thread->tid);
461 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
463 if (thread == mono_thread_internal_current ()) {
465 * This will signal async signal handlers that the thread has exited.
466 * The profiler callback needs this to be set, so it cannot be done earlier.
468 mono_domain_unset ();
469 mono_memory_barrier ();
472 if (thread == mono_thread_internal_current ())
473 mono_thread_pop_appdomain_ref ();
475 thread->cached_culture_info = NULL;
477 mono_free_static_data (thread->static_data);
478 thread->static_data = NULL;
479 ref_stack_destroy (thread->appdomain_refs);
480 thread->appdomain_refs = NULL;
482 if (mono_thread_cleanup_fn)
483 mono_thread_cleanup_fn (thread_get_tid (thread));
485 if (mono_gc_is_moving ()) {
486 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
487 thread->thread_pinning_ref = NULL;
493 * A special static data offset (guint32) consists of 3 parts:
495 * [0] 6-bit index into the array of chunks.
496 * [6] 25-bit offset into the array.
497 * [31] Bit indicating thread or context static.
502 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
513 } SpecialStaticOffset;
515 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
516 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
518 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
519 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
520 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
521 (((SpecialStaticOffset *) &(x))->fields.f)
524 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
526 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
528 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
529 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
531 return ((char *) thread->static_data [idx]) + off;
535 get_context_static_data (MonoAppContext *ctx, guint32 offset)
537 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
539 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
540 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
542 return ((char *) ctx->static_data [idx]) + off;
546 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
548 static MonoClassField *current_thread_field = NULL;
552 if (!current_thread_field) {
553 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
554 g_assert (current_thread_field);
557 mono_class_vtable (domain, mono_defaults.thread_class);
558 mono_domain_lock (domain);
559 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
560 mono_domain_unlock (domain);
563 return (MonoThread **)get_thread_static_data (thread, offset);
567 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
569 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
571 g_assert (current->obj.vtable->domain == domain);
573 g_assert (!*current_thread_ptr);
574 *current_thread_ptr = current;
578 create_thread_object (MonoDomain *domain, MonoError *error)
580 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
581 MonoThread *t = (MonoThread*)mono_object_new_mature (vt, error);
586 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal, MonoError *error)
590 thread = create_thread_object (domain, error);
591 if (!mono_error_ok (error))
594 MONO_OBJECT_SETREF (thread, internal_thread, internal);
599 static MonoInternalThread*
600 create_internal_thread (MonoError *error)
602 MonoInternalThread *thread;
605 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
606 thread = (MonoInternalThread*) mono_object_new_mature (vt, error);
607 if (!mono_error_ok (error))
610 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
611 mono_coop_mutex_init_recursive (thread->synch_cs);
613 thread->apartment_state = ThreadApartmentState_Unknown;
614 thread->managed_id = get_next_managed_thread_id ();
615 if (mono_gc_is_moving ()) {
616 thread->thread_pinning_ref = thread;
617 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
624 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate, MonoError *error)
626 MonoDomain *domain = mono_get_root_domain ();
628 mono_error_init (error);
629 if (!candidate || candidate->obj.vtable->domain != domain) {
630 candidate = new_thread_with_internal (domain, thread, error);
631 return_val_if_nok (error, FALSE);
633 set_current_thread_for_domain (domain, thread, candidate);
634 g_assert (!thread->root_domain_thread);
635 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
639 static guint32 WINAPI start_wrapper_internal(void *data)
642 MonoThreadInfo *info;
643 StartInfo *start_info = (StartInfo *)data;
644 guint32 (*start_func)(void *);
648 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
651 MonoInternalThread *internal = start_info->obj->internal_thread;
652 MonoObject *start_delegate = start_info->delegate;
653 MonoDomain *domain = start_info->obj->obj.vtable->domain;
655 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
657 /* We can be sure start_info->obj->tid and
658 * start_info->obj->handle have been set, because the thread
659 * was created suspended, and these values were set before the
663 info = mono_thread_info_current ();
665 internal->thread_info = info;
666 internal->small_id = info->small_id;
670 SET_CURRENT_OBJECT (internal);
672 /* Every thread references the appdomain which created it */
673 mono_thread_push_appdomain_ref (domain);
675 if (!mono_domain_set (domain, FALSE)) {
676 /* No point in raising an appdomain_unloaded exception here */
677 /* FIXME: Cleanup here */
678 mono_thread_pop_appdomain_ref ();
682 start_func = start_info->func;
683 start_arg = start_info->obj->start_obj;
685 start_arg = start_info->start_arg;
687 /* We have to do this here because mono_thread_new_init()
688 requires that root_domain_thread is set up. */
689 thread_adjust_static_data (internal);
690 init_root_domain_thread (internal, start_info->obj, &error);
691 mono_error_raise_exception (&error); /* FIXME don't raise here */
693 /* This MUST be called before any managed code can be
694 * executed, as it calls the callback function that (for the
695 * jit) sets the lmf marker.
697 mono_thread_new_init (tid, &tid, start_func);
698 internal->stack_ptr = &tid;
699 if (domain != mono_get_root_domain ())
700 set_current_thread_for_domain (domain, internal, start_info->obj);
702 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
704 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
706 /* On 2.0 profile (and higher), set explicitly since state might have been
708 if (internal->apartment_state == ThreadApartmentState_Unknown)
709 internal->apartment_state = ThreadApartmentState_MTA;
711 mono_thread_init_apartment_state ();
713 if(internal->start_notify!=NULL) {
714 /* Let the thread that called Start() know we're
717 ReleaseSemaphore (internal->start_notify, 1, NULL);
721 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
725 * Call this after calling start_notify, since the profiler callback might want
726 * to lock the thread, and the lock is held by thread_start () which waits for
729 mono_profiler_thread_start (tid);
731 /* if the name was set before starting, we didn't invoke the profiler callback */
732 if (internal->name) {
733 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
734 mono_profiler_thread_name (internal->tid, tname);
735 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
739 /* start_func is set only for unmanaged start functions */
741 start_func (start_arg);
744 g_assert (start_delegate != NULL);
745 args [0] = start_arg;
746 /* we may want to handle the exception here. See comment below on unhandled exceptions */
747 mono_runtime_delegate_invoke (start_delegate, args, NULL);
750 /* If the thread calls ExitThread at all, this remaining code
751 * will not be executed, but the main thread will eventually
752 * call thread_cleanup() on this thread's behalf.
755 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
757 /* Do any cleanup needed for apartment state. This
758 * cannot be done in thread_cleanup since thread_cleanup could be
759 * called for a thread other than the current thread.
760 * mono_thread_cleanup_apartment_state cleans up apartment
761 * for the current thead */
762 mono_thread_cleanup_apartment_state ();
764 thread_cleanup (internal);
768 /* Remove the reference to the thread object in the TLS data,
769 * so the thread object can be finalized. This won't be
770 * reached if the thread threw an uncaught exception, so those
771 * thread handles will stay referenced :-( (This is due to
772 * missing support for scanning thread-specific data in the
773 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
776 SET_CURRENT_OBJECT (NULL);
781 static guint32 WINAPI start_wrapper(void *data)
785 /* Avoid scanning the frames above this frame during a GC */
786 mono_gc_set_stack_end ((void*)&dummy);
788 return start_wrapper_internal (data);
794 * Common thread creation code.
795 * LOCKING: Acquires the threads lock.
798 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
801 HANDLE thread_handle;
802 MonoNativeThreadId tid;
803 guint32 create_flags;
806 * Join joinable threads to prevent running out of threads since the finalizer
807 * thread might be blocked/backlogged.
809 mono_threads_join_threads ();
811 mono_error_init (error);
813 mono_threads_lock ();
816 mono_threads_unlock ();
819 if (threads_starting_up == NULL) {
820 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
821 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
823 mono_g_hash_table_insert (threads_starting_up, thread, thread);
824 mono_threads_unlock ();
826 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
827 if (!internal->start_notify) {
828 mono_threads_lock ();
829 mono_g_hash_table_remove (threads_starting_up, thread);
830 mono_threads_unlock ();
831 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
837 stack_size = default_stacksize_for_thread (internal);
839 /* Create suspended, so we can do some housekeeping before the thread
842 create_flags = CREATE_SUSPENDED;
844 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
845 stack_size, create_flags, &tid);
847 if (thread_handle == NULL) {
848 /* The thread couldn't be created, so set an exception */
849 mono_threads_lock ();
850 mono_g_hash_table_remove (threads_starting_up, thread);
851 mono_threads_unlock ();
853 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
856 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
858 internal->handle = thread_handle;
859 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
861 internal->threadpool_thread = threadpool_thread;
862 if (threadpool_thread)
863 mono_thread_set_state (internal, ThreadState_Background);
865 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
867 /* Only store the handle when the thread is about to be
868 * launched, to avoid the main thread deadlocking while trying
869 * to clean up a thread that will never be signalled.
871 if (!handle_store (thread, FALSE))
874 mono_thread_info_resume (tid);
876 if (internal->start_notify) {
878 * Wait for the thread to set up its TLS data etc, so
879 * theres no potential race condition if someone tries
880 * to look up the data believing the thread has
883 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
886 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
889 CloseHandle (internal->start_notify);
890 internal->start_notify = NULL;
893 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
898 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
900 if (mono_thread_start_cb) {
901 mono_thread_start_cb (tid, stack_start, func);
905 void mono_threads_set_default_stacksize (guint32 stacksize)
907 default_stacksize = stacksize;
910 guint32 mono_threads_get_default_stacksize (void)
912 return default_stacksize;
916 * mono_thread_create_internal:
918 * ARG should not be a GC reference.
921 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
924 MonoInternalThread *internal;
925 StartInfo *start_info;
928 mono_error_init (error);
930 thread = create_thread_object (domain, error);
931 return_val_if_nok (error, NULL);
933 internal = create_internal_thread (error);
934 return_val_if_nok (error, NULL);
936 MONO_OBJECT_SETREF (thread, internal_thread, internal);
938 start_info = g_new0 (StartInfo, 1);
939 start_info->func = (guint32 (*)(void *))func;
940 start_info->obj = thread;
941 start_info->start_arg = arg;
943 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, error);
944 return_val_if_nok (error, NULL);
946 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
947 #ifndef MONO_CROSS_COMPILE
948 if (mono_check_corlib_version () == NULL)
949 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
956 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
959 if (!mono_thread_create_checked (domain, func, arg, &error))
960 mono_error_cleanup (&error);
964 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
966 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
970 mono_thread_attach (MonoDomain *domain)
973 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
974 mono_error_raise_exception (&error);
980 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
982 MonoThreadInfo *info;
983 MonoInternalThread *thread;
984 MonoThread *current_thread;
985 HANDLE thread_handle;
986 MonoNativeThreadId tid;
988 mono_error_init (error);
990 if ((thread = mono_thread_internal_current ())) {
991 if (domain != mono_domain_get ())
992 mono_domain_set (domain, TRUE);
993 /* Already attached */
994 return mono_thread_current ();
997 if (!mono_gc_register_thread (&domain)) {
998 g_error ("Thread %"G_GSIZE_FORMAT" calling into managed code is not registered with the GC. On UNIX, this can be fixed by #include-ing <gc.h> before <pthread.h> in the file containing the thread creation code.", mono_native_thread_id_get ());
1001 thread = create_internal_thread (error);
1002 if (!mono_error_ok (error))
1005 thread_handle = mono_thread_info_open_handle ();
1006 g_assert (thread_handle);
1008 tid=mono_native_thread_id_get ();
1010 thread->handle = thread_handle;
1011 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
1012 thread->stack_ptr = &tid;
1014 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1016 info = mono_thread_info_current ();
1018 thread->thread_info = info;
1019 thread->small_id = info->small_id;
1021 current_thread = new_thread_with_internal (domain, thread, error);
1022 if (!mono_error_ok (error))
1025 if (!handle_store (current_thread, force_attach)) {
1026 /* Mono is shutting down, so just wait for the end */
1028 mono_thread_info_sleep (10000, NULL);
1031 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1033 SET_CURRENT_OBJECT (thread);
1034 mono_domain_set (domain, TRUE);
1036 thread_adjust_static_data (thread);
1038 init_root_domain_thread (thread, current_thread, error);
1039 return_val_if_nok (error, NULL);
1041 if (domain != mono_get_root_domain ())
1042 set_current_thread_for_domain (domain, thread, current_thread);
1045 if (mono_thread_attach_cb) {
1049 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1052 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1054 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1057 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1058 if (!info->tools_thread)
1059 // FIXME: Need a separate callback
1060 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1062 return current_thread;
1066 mono_thread_detach_internal (MonoInternalThread *thread)
1068 g_return_if_fail (thread != NULL);
1070 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1072 thread_cleanup (thread);
1074 SET_CURRENT_OBJECT (NULL);
1075 mono_domain_unset ();
1077 /* Don't need to CloseHandle this thread, even though we took a
1078 * reference in mono_thread_attach (), because the GC will do it
1079 * when the Thread object is finalised.
1084 mono_thread_detach (MonoThread *thread)
1087 mono_thread_detach_internal (thread->internal_thread);
1091 * mono_thread_detach_if_exiting:
1093 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1094 * This should be used at the end of embedding code which calls into managed code, and which
1095 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1098 mono_thread_detach_if_exiting (void)
1100 if (mono_thread_info_is_exiting ()) {
1101 MonoInternalThread *thread;
1103 thread = mono_thread_internal_current ();
1105 mono_thread_detach_internal (thread);
1106 mono_thread_info_detach ();
1114 MonoInternalThread *thread = mono_thread_internal_current ();
1116 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1118 thread_cleanup (thread);
1119 SET_CURRENT_OBJECT (NULL);
1120 mono_domain_unset ();
1122 /* we could add a callback here for embedders to use. */
1123 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1124 exit (mono_environment_exitcode_get ());
1125 mono_thread_info_exit ();
1129 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1132 MonoInternalThread *internal;
1134 internal = create_internal_thread (&error);
1135 mono_error_raise_exception (&error);
1137 internal->state = ThreadState_Unstarted;
1139 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1143 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1147 StartInfo *start_info;
1148 MonoInternalThread *internal;
1151 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1153 if (!this_obj->internal_thread)
1154 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1155 internal = this_obj->internal_thread;
1157 LOCK_THREAD (internal);
1159 if ((internal->state & ThreadState_Unstarted) == 0) {
1160 UNLOCK_THREAD (internal);
1161 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1165 if ((internal->state & ThreadState_Aborted) != 0) {
1166 UNLOCK_THREAD (internal);
1169 /* This is freed in start_wrapper */
1170 start_info = g_new0 (StartInfo, 1);
1171 start_info->func = NULL;
1172 start_info->start_arg = NULL;
1173 start_info->delegate = start;
1174 start_info->obj = this_obj;
1175 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1177 res = create_thread (this_obj, internal, start_info, FALSE, 0, &error);
1179 mono_error_cleanup (&error);
1180 UNLOCK_THREAD (internal);
1184 internal->state &= ~ThreadState_Unstarted;
1186 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1188 UNLOCK_THREAD (internal);
1189 return internal->handle;
1193 * This is called from the finalizer of the internal thread object.
1196 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1198 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1201 * Since threads keep a reference to their thread object while running, by the time this function is called,
1202 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1203 * when thread_cleanup () can be called after this.
1206 CloseHandle (thread);
1208 if (this_obj->synch_cs) {
1209 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1210 this_obj->synch_cs = NULL;
1211 mono_coop_mutex_destroy (synch_cs);
1215 if (this_obj->name) {
1216 void *name = this_obj->name;
1217 this_obj->name = NULL;
1223 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1226 MonoInternalThread *thread = mono_thread_internal_current ();
1228 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1230 mono_thread_current_check_pending_interrupt ();
1233 gboolean alerted = FALSE;
1235 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1237 res = mono_thread_info_sleep (ms, &alerted);
1239 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1242 MonoException* exc = mono_thread_execute_interruption ();
1244 mono_raise_exception (exc);
1256 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1261 ves_icall_System_Threading_Thread_GetDomainID (void)
1263 return mono_domain_get()->domain_id;
1267 ves_icall_System_Threading_Thread_Yield (void)
1269 return mono_thread_info_yield ();
1273 * mono_thread_get_name:
1275 * Return the name of the thread. NAME_LEN is set to the length of the name.
1276 * Return NULL if the thread has no name. The returned memory is owned by the
1280 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1284 LOCK_THREAD (this_obj);
1286 if (!this_obj->name) {
1290 *name_len = this_obj->name_len;
1291 res = g_new (gunichar2, this_obj->name_len);
1292 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1295 UNLOCK_THREAD (this_obj);
1301 * mono_thread_get_name_utf8:
1303 * Return the name of the thread in UTF-8.
1304 * Return NULL if the thread has no name.
1305 * The returned memory is owned by the caller.
1308 mono_thread_get_name_utf8 (MonoThread *thread)
1313 MonoInternalThread *internal = thread->internal_thread;
1314 if (internal == NULL)
1317 LOCK_THREAD (internal);
1319 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1321 UNLOCK_THREAD (internal);
1327 * mono_thread_get_managed_id:
1329 * Return the Thread.ManagedThreadId value of `thread`.
1330 * Returns -1 if `thread` is NULL.
1333 mono_thread_get_managed_id (MonoThread *thread)
1338 MonoInternalThread *internal = thread->internal_thread;
1339 if (internal == NULL)
1342 int32_t id = internal->managed_id;
1348 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1353 mono_error_init (&error);
1355 LOCK_THREAD (this_obj);
1357 if (!this_obj->name)
1360 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1362 UNLOCK_THREAD (this_obj);
1364 mono_error_raise_exception (&error);
1370 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1372 LOCK_THREAD (this_obj);
1374 mono_error_init (error);
1376 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1377 UNLOCK_THREAD (this_obj);
1379 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1382 if (this_obj->name) {
1383 g_free (this_obj->name);
1384 this_obj->name_len = 0;
1387 this_obj->name = g_new (gunichar2, mono_string_length (name));
1388 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1389 this_obj->name_len = mono_string_length (name);
1392 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1395 this_obj->name = NULL;
1398 UNLOCK_THREAD (this_obj);
1400 if (this_obj->name && this_obj->tid) {
1401 char *tname = mono_string_to_utf8 (name);
1402 mono_profiler_thread_name (this_obj->tid, tname);
1403 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1409 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1412 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1413 mono_error_set_pending_exception (&error);
1417 * ves_icall_System_Threading_Thread_GetPriority_internal:
1418 * @param this_obj: The MonoInternalThread on which to operate.
1420 * Gets the priority of the given thread.
1421 * @return: The priority of the given thread.
1424 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1427 MonoInternalThread *internal = this_obj->internal_thread;
1429 LOCK_THREAD (internal);
1430 priority = GetThreadPriority (internal->handle) + 2;
1431 UNLOCK_THREAD (internal);
1436 * ves_icall_System_Threading_Thread_SetPriority_internal:
1437 * @param this_obj: The MonoInternalThread on which to operate.
1438 * @param priority: The priority to set.
1440 * Sets the priority of the given thread.
1443 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1445 MonoInternalThread *internal = this_obj->internal_thread;
1447 LOCK_THREAD (internal);
1448 SetThreadPriority (internal->handle, priority - 2);
1449 UNLOCK_THREAD (internal);
1452 /* If the array is already in the requested domain, we just return it,
1453 otherwise we return a copy in that domain. */
1455 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1459 mono_error_init (error);
1463 if (mono_object_domain (arr) == domain)
1466 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1467 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1472 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1475 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1476 mono_error_set_pending_exception (&error);
1481 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1484 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1485 mono_error_set_pending_exception (&error);
1490 mono_thread_current (void)
1493 MonoDomain *domain = mono_domain_get ();
1494 MonoInternalThread *internal = mono_thread_internal_current ();
1495 MonoThread **current_thread_ptr;
1497 g_assert (internal);
1498 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1500 if (!*current_thread_ptr) {
1501 g_assert (domain != mono_get_root_domain ());
1502 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1503 mono_error_raise_exception (&error); /* FIXME don't raise here */
1505 return *current_thread_ptr;
1508 /* Return the thread object belonging to INTERNAL in the current domain */
1510 mono_thread_current_for_thread (MonoInternalThread *internal)
1513 MonoDomain *domain = mono_domain_get ();
1514 MonoThread **current_thread_ptr;
1516 g_assert (internal);
1517 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1519 if (!*current_thread_ptr) {
1520 g_assert (domain != mono_get_root_domain ());
1521 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1522 mono_error_raise_exception (&error); /* FIXME don't raise here */
1524 return *current_thread_ptr;
1528 mono_thread_internal_current (void)
1530 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1531 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1536 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1538 MonoInternalThread *thread = this_obj->internal_thread;
1539 HANDLE handle = thread->handle;
1540 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1543 mono_thread_current_check_pending_interrupt ();
1545 LOCK_THREAD (thread);
1547 if ((thread->state & ThreadState_Unstarted) != 0) {
1548 UNLOCK_THREAD (thread);
1550 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1554 UNLOCK_THREAD (thread);
1559 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1561 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1564 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1567 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1569 if(ret==WAIT_OBJECT_0) {
1570 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1575 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1581 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1589 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1593 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1595 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1598 if (ret != WAIT_IO_COMPLETION)
1601 exc = mono_thread_execute_interruption ();
1603 mono_raise_exception (exc);
1608 /* Re-calculate ms according to the time passed */
1609 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1610 if (diff_ms >= ms) {
1614 wait = ms - diff_ms;
1620 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1626 MonoObject *waitHandle;
1627 MonoInternalThread *thread = mono_thread_internal_current ();
1629 /* Do this WaitSleepJoin check before creating objects */
1630 mono_thread_current_check_pending_interrupt ();
1632 /* We fail in managed if the array has more than 64 elements */
1633 numhandles = (guint32)mono_array_length(mono_handles);
1634 handles = g_new0(HANDLE, numhandles);
1636 for(i = 0; i < numhandles; i++) {
1637 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1638 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1645 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1647 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1649 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1653 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1654 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1657 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1659 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1660 uintptr_t numhandles;
1663 MonoObject *waitHandle;
1664 MonoInternalThread *thread = mono_thread_internal_current ();
1666 /* Do this WaitSleepJoin check before creating objects */
1667 mono_thread_current_check_pending_interrupt ();
1669 numhandles = mono_array_length(mono_handles);
1670 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1673 for(i = 0; i < numhandles; i++) {
1674 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1675 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1682 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1684 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1686 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1688 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1691 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1693 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1694 return ret - WAIT_OBJECT_0;
1696 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1697 return ret - WAIT_ABANDONED_0;
1700 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1701 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1705 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1708 MonoInternalThread *thread = mono_thread_internal_current ();
1710 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1716 mono_thread_current_check_pending_interrupt ();
1718 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1720 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1722 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1724 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1725 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1729 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1732 MonoInternalThread *thread = mono_thread_internal_current ();
1737 mono_thread_current_check_pending_interrupt ();
1739 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1742 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1745 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1747 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1748 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1751 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1758 mutex = CreateMutex (NULL, owned, NULL);
1760 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1762 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1770 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1771 return(ReleaseMutex (handle));
1774 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1780 *error = ERROR_SUCCESS;
1782 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1784 *error = GetLastError ();
1791 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1798 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1800 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1801 mono_string_chars (name));
1803 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1811 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1815 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1820 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1824 *error = ERROR_SUCCESS;
1826 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1828 *error = GetLastError ();
1834 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1841 event = CreateEvent (NULL, manual, initial, NULL);
1843 event = CreateEvent (NULL, manual, initial,
1844 mono_string_chars (name));
1846 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1854 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1855 return (SetEvent(handle));
1858 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1859 return (ResetEvent(handle));
1863 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1864 CloseHandle (handle);
1867 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1873 *error = ERROR_SUCCESS;
1875 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1877 *error = GetLastError ();
1883 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1885 return InterlockedIncrement (location);
1888 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1890 #if SIZEOF_VOID_P == 4
1891 if (G_UNLIKELY ((size_t)location & 0x7)) {
1893 mono_interlocked_lock ();
1896 mono_interlocked_unlock ();
1900 return InterlockedIncrement64 (location);
1903 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1905 return InterlockedDecrement(location);
1908 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1910 #if SIZEOF_VOID_P == 4
1911 if (G_UNLIKELY ((size_t)location & 0x7)) {
1913 mono_interlocked_lock ();
1916 mono_interlocked_unlock ();
1920 return InterlockedDecrement64 (location);
1923 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1925 return InterlockedExchange(location, value);
1928 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1931 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1932 mono_gc_wbarrier_generic_nostore (location);
1936 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1938 return InterlockedExchangePointer(location, value);
1941 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1943 IntFloatUnion val, ret;
1946 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1952 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1954 #if SIZEOF_VOID_P == 4
1955 if (G_UNLIKELY ((size_t)location & 0x7)) {
1957 mono_interlocked_lock ();
1960 mono_interlocked_unlock ();
1964 return InterlockedExchange64 (location, value);
1968 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1970 LongDoubleUnion val, ret;
1973 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1978 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1980 return InterlockedCompareExchange(location, value, comparand);
1983 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1985 gint32 r = InterlockedCompareExchange(location, value, comparand);
1986 *success = r == comparand;
1990 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1993 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1994 mono_gc_wbarrier_generic_nostore (location);
1998 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2000 return InterlockedCompareExchangePointer(location, value, comparand);
2003 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2005 IntFloatUnion val, ret, cmp;
2008 cmp.fval = comparand;
2009 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2015 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2017 #if SIZEOF_VOID_P == 8
2018 LongDoubleUnion val, comp, ret;
2021 comp.fval = comparand;
2022 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2028 mono_interlocked_lock ();
2030 if (old == comparand)
2032 mono_interlocked_unlock ();
2039 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2041 #if SIZEOF_VOID_P == 4
2042 if (G_UNLIKELY ((size_t)location & 0x7)) {
2044 mono_interlocked_lock ();
2046 if (old == comparand)
2048 mono_interlocked_unlock ();
2052 return InterlockedCompareExchange64 (location, value, comparand);
2056 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2059 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2060 mono_gc_wbarrier_generic_nostore (location);
2065 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2068 MONO_CHECK_NULL (location, NULL);
2069 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2070 mono_gc_wbarrier_generic_nostore (location);
2075 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2077 return InterlockedAdd (location, value);
2081 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2083 #if SIZEOF_VOID_P == 4
2084 if (G_UNLIKELY ((size_t)location & 0x7)) {
2086 mono_interlocked_lock ();
2089 mono_interlocked_unlock ();
2093 return InterlockedAdd64 (location, value);
2097 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2099 #if SIZEOF_VOID_P == 4
2100 if (G_UNLIKELY ((size_t)location & 0x7)) {
2102 mono_interlocked_lock ();
2104 mono_interlocked_unlock ();
2108 return InterlockedRead64 (location);
2112 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2114 mono_memory_barrier ();
2118 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2120 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2122 if (state & ThreadState_Background) {
2123 /* If the thread changes the background mode, the main thread has to
2124 * be notified, since it has to rebuild the list of threads to
2127 SetEvent (background_change_event);
2132 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2134 mono_thread_set_state (this_obj, (MonoThreadState)state);
2136 if (state & ThreadState_Background) {
2137 /* If the thread changes the background mode, the main thread has to
2138 * be notified, since it has to rebuild the list of threads to
2141 SetEvent (background_change_event);
2146 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2150 LOCK_THREAD (this_obj);
2152 state = this_obj->state;
2154 UNLOCK_THREAD (this_obj);
2159 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2161 MonoInternalThread *current;
2163 MonoInternalThread *thread = this_obj->internal_thread;
2165 LOCK_THREAD (thread);
2167 current = mono_thread_internal_current ();
2169 thread->thread_interrupt_requested = TRUE;
2170 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2172 UNLOCK_THREAD (thread);
2175 async_abort_internal (thread, FALSE);
2179 void mono_thread_current_check_pending_interrupt ()
2181 MonoInternalThread *thread = mono_thread_internal_current ();
2182 gboolean throw_ = FALSE;
2184 LOCK_THREAD (thread);
2186 if (thread->thread_interrupt_requested) {
2188 thread->thread_interrupt_requested = FALSE;
2191 UNLOCK_THREAD (thread);
2194 mono_raise_exception (mono_get_exception_thread_interrupted ());
2199 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2201 LOCK_THREAD (thread);
2203 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2204 (thread->state & ThreadState_StopRequested) != 0 ||
2205 (thread->state & ThreadState_Stopped) != 0)
2207 UNLOCK_THREAD (thread);
2211 if ((thread->state & ThreadState_Unstarted) != 0) {
2212 thread->state |= ThreadState_Aborted;
2213 UNLOCK_THREAD (thread);
2217 thread->state |= ThreadState_AbortRequested;
2218 if (thread->abort_state_handle)
2219 mono_gchandle_free (thread->abort_state_handle);
2221 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2222 g_assert (thread->abort_state_handle);
2224 thread->abort_state_handle = 0;
2226 thread->abort_exc = NULL;
2228 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));
2230 /* During shutdown, we can't wait for other threads */
2232 /* Make sure the thread is awake */
2233 mono_thread_resume (thread);
2235 UNLOCK_THREAD (thread);
2237 if (thread == mono_thread_internal_current ())
2238 self_abort_internal ();
2240 async_abort_internal (thread, TRUE);
2244 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2246 MonoInternalThread *thread = mono_thread_internal_current ();
2247 gboolean was_aborting;
2249 LOCK_THREAD (thread);
2250 was_aborting = thread->state & ThreadState_AbortRequested;
2251 thread->state &= ~ThreadState_AbortRequested;
2252 UNLOCK_THREAD (thread);
2254 if (!was_aborting) {
2255 const char *msg = "Unable to reset abort because no abort was requested";
2256 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2259 thread->abort_exc = NULL;
2260 if (thread->abort_state_handle) {
2261 mono_gchandle_free (thread->abort_state_handle);
2262 /* This is actually not necessary - the handle
2263 only counts if the exception is set */
2264 thread->abort_state_handle = 0;
2269 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2271 LOCK_THREAD (thread);
2273 thread->state &= ~ThreadState_AbortRequested;
2275 if (thread->abort_exc) {
2276 thread->abort_exc = NULL;
2277 if (thread->abort_state_handle) {
2278 mono_gchandle_free (thread->abort_state_handle);
2279 /* This is actually not necessary - the handle
2280 only counts if the exception is set */
2281 thread->abort_state_handle = 0;
2285 UNLOCK_THREAD (thread);
2289 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2292 MonoInternalThread *thread = this_obj->internal_thread;
2293 MonoObject *state, *deserialized = NULL;
2296 if (!thread->abort_state_handle)
2299 state = mono_gchandle_get_target (thread->abort_state_handle);
2302 domain = mono_domain_get ();
2303 if (mono_object_domain (state) == domain)
2306 deserialized = mono_object_xdomain_representation (state, domain, &error);
2308 if (!deserialized) {
2309 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2310 if (!is_ok (&error)) {
2311 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2312 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2314 mono_set_pending_exception (invalid_op_exc);
2318 return deserialized;
2322 mono_thread_suspend (MonoInternalThread *thread)
2324 LOCK_THREAD (thread);
2326 if ((thread->state & ThreadState_Unstarted) != 0 ||
2327 (thread->state & ThreadState_Aborted) != 0 ||
2328 (thread->state & ThreadState_Stopped) != 0)
2330 UNLOCK_THREAD (thread);
2334 if ((thread->state & ThreadState_Suspended) != 0 ||
2335 (thread->state & ThreadState_SuspendRequested) != 0 ||
2336 (thread->state & ThreadState_StopRequested) != 0)
2338 UNLOCK_THREAD (thread);
2342 thread->state |= ThreadState_SuspendRequested;
2344 if (thread == mono_thread_internal_current ()) {
2345 /* calls UNLOCK_THREAD (thread) */
2346 self_suspend_internal ();
2348 /* calls UNLOCK_THREAD (thread) */
2349 async_suspend_internal (thread, FALSE);
2356 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2358 if (!mono_thread_suspend (this_obj->internal_thread)) {
2359 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2364 /* LOCKING: LOCK_THREAD(thread) must be held */
2366 mono_thread_resume (MonoInternalThread *thread)
2368 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2369 thread->state &= ~ThreadState_SuspendRequested;
2373 if ((thread->state & ThreadState_Suspended) == 0 ||
2374 (thread->state & ThreadState_Unstarted) != 0 ||
2375 (thread->state & ThreadState_Aborted) != 0 ||
2376 (thread->state & ThreadState_Stopped) != 0)
2381 UNLOCK_THREAD (thread);
2383 /* Awake the thread */
2384 if (!mono_thread_info_resume (thread_get_tid (thread)))
2387 LOCK_THREAD (thread);
2389 thread->state &= ~ThreadState_Suspended;
2395 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2397 if (!thread->internal_thread) {
2398 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2400 LOCK_THREAD (thread->internal_thread);
2401 if (!mono_thread_resume (thread->internal_thread))
2402 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2403 UNLOCK_THREAD (thread->internal_thread);
2408 mono_threads_is_critical_method (MonoMethod *method)
2410 switch (method->wrapper_type) {
2411 case MONO_WRAPPER_RUNTIME_INVOKE:
2412 case MONO_WRAPPER_XDOMAIN_INVOKE:
2413 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2420 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2425 if (mono_threads_is_critical_method (m)) {
2426 *((gboolean*)data) = TRUE;
2433 is_running_protected_wrapper (void)
2435 gboolean found = FALSE;
2436 mono_stack_walk (find_wrapper, &found);
2440 void mono_thread_internal_stop (MonoInternalThread *thread)
2442 LOCK_THREAD (thread);
2444 if ((thread->state & ThreadState_StopRequested) != 0 ||
2445 (thread->state & ThreadState_Stopped) != 0)
2447 UNLOCK_THREAD (thread);
2451 /* Make sure the thread is awake */
2452 mono_thread_resume (thread);
2454 thread->state |= ThreadState_StopRequested;
2455 thread->state &= ~ThreadState_AbortRequested;
2457 UNLOCK_THREAD (thread);
2459 if (thread == mono_thread_internal_current ())
2460 self_abort_internal ();
2462 async_abort_internal (thread, TRUE);
2465 void mono_thread_stop (MonoThread *thread)
2467 mono_thread_internal_stop (thread->internal_thread);
2471 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2473 gint8 tmp = *(volatile gint8 *)ptr;
2474 mono_memory_barrier ();
2479 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2481 gint16 tmp = *(volatile gint16 *)ptr;
2482 mono_memory_barrier ();
2487 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2489 gint32 tmp = *(volatile gint32 *)ptr;
2490 mono_memory_barrier ();
2495 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2497 gint64 tmp = *(volatile gint64 *)ptr;
2498 mono_memory_barrier ();
2503 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2505 volatile void *tmp = *(volatile void **)ptr;
2506 mono_memory_barrier ();
2507 return (void *) tmp;
2511 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2513 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2514 mono_memory_barrier ();
2515 return (MonoObject *) tmp;
2519 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2521 double tmp = *(volatile double *)ptr;
2522 mono_memory_barrier ();
2527 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2529 float tmp = *(volatile float *)ptr;
2530 mono_memory_barrier ();
2535 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2537 return InterlockedRead8 ((volatile gint8 *)ptr);
2541 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2543 return InterlockedRead16 ((volatile gint16 *)ptr);
2547 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2549 return InterlockedRead ((volatile gint32 *)ptr);
2553 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2555 #if SIZEOF_VOID_P == 4
2556 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2558 mono_interlocked_lock ();
2559 val = *(gint64*)ptr;
2560 mono_interlocked_unlock ();
2564 return InterlockedRead64 ((volatile gint64 *)ptr);
2568 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2570 return InterlockedReadPointer ((volatile gpointer *)ptr);
2574 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2578 #if SIZEOF_VOID_P == 4
2579 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2581 mono_interlocked_lock ();
2582 val = *(double*)ptr;
2583 mono_interlocked_unlock ();
2588 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2594 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2598 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2604 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2606 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2610 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2612 mono_memory_barrier ();
2613 *(volatile gint8 *)ptr = value;
2617 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2619 mono_memory_barrier ();
2620 *(volatile gint16 *)ptr = value;
2624 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2626 mono_memory_barrier ();
2627 *(volatile gint32 *)ptr = value;
2631 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2633 mono_memory_barrier ();
2634 *(volatile gint64 *)ptr = value;
2638 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2640 mono_memory_barrier ();
2641 *(volatile void **)ptr = value;
2645 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2647 mono_memory_barrier ();
2648 mono_gc_wbarrier_generic_store (ptr, value);
2652 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2654 mono_memory_barrier ();
2655 *(volatile double *)ptr = value;
2659 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2661 mono_memory_barrier ();
2662 *(volatile float *)ptr = value;
2666 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2668 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2672 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2674 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2678 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2680 InterlockedWrite ((volatile gint32 *)ptr, value);
2684 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2686 #if SIZEOF_VOID_P == 4
2687 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2688 mono_interlocked_lock ();
2689 *(gint64*)ptr = value;
2690 mono_interlocked_unlock ();
2695 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2699 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2701 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2705 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2709 #if SIZEOF_VOID_P == 4
2710 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2711 mono_interlocked_lock ();
2712 *(double*)ptr = value;
2713 mono_interlocked_unlock ();
2720 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2724 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2730 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2734 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2736 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2740 free_context (void *user_data)
2742 ContextStaticData *data = user_data;
2744 mono_threads_lock ();
2747 * There is no guarantee that, by the point this reference queue callback
2748 * has been invoked, the GC handle associated with the object will fail to
2749 * resolve as one might expect. So if we don't free and remove the GC
2750 * handle here, free_context_static_data_helper () could end up resolving
2751 * a GC handle to an actually-dead context which would contain a pointer
2752 * to an already-freed static data segment, resulting in a crash when
2755 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2757 mono_threads_unlock ();
2759 mono_gchandle_free (data->gc_handle);
2760 mono_free_static_data (data->static_data);
2765 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2767 mono_threads_lock ();
2769 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2772 contexts = g_hash_table_new (NULL, NULL);
2775 context_queue = mono_gc_reference_queue_new (free_context);
2777 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2778 g_hash_table_insert (contexts, gch, gch);
2781 * We use this intermediate structure to contain a duplicate pointer to
2782 * the static data because we can't rely on being able to resolve the GC
2783 * handle in the reference queue callback.
2785 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2786 data->gc_handle = GPOINTER_TO_UINT (gch);
2789 context_adjust_static_data (ctx);
2790 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2792 mono_threads_unlock ();
2794 mono_profiler_context_loaded (ctx);
2798 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2801 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2802 * cleanup in exceptional circumstances, we don't actually do any
2803 * cleanup work here. We instead do this via a reference queue.
2806 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2808 mono_profiler_context_unloaded (ctx);
2812 mono_thread_init_tls (void)
2814 MONO_FAST_TLS_INIT (tls_current_object);
2815 mono_native_tls_alloc (¤t_object_key, NULL);
2818 void mono_thread_init (MonoThreadStartCB start_cb,
2819 MonoThreadAttachCB attach_cb)
2821 mono_coop_mutex_init_recursive (&threads_mutex);
2823 mono_os_mutex_init_recursive(&interlocked_mutex);
2824 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2826 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2827 g_assert(background_change_event != NULL);
2829 mono_init_static_data_info (&thread_static_info);
2830 mono_init_static_data_info (&context_static_info);
2832 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2834 mono_thread_start_cb = start_cb;
2835 mono_thread_attach_cb = attach_cb;
2837 /* Get a pseudo handle to the current process. This is just a
2838 * kludge so that wapi can build a process handle if needed.
2839 * As a pseudo handle is returned, we don't need to clean
2842 GetCurrentProcess ();
2845 void mono_thread_cleanup (void)
2847 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2848 MonoThreadInfo *info;
2850 /* The main thread must abandon any held mutexes (particularly
2851 * important for named mutexes as they are shared across
2852 * processes, see bug 74680.) This will happen when the
2853 * thread exits, but if it's not running in a subthread it
2854 * won't exit in time.
2856 info = mono_thread_info_current ();
2857 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2861 /* This stuff needs more testing, it seems one of these
2862 * critical sections can be locked when mono_thread_cleanup is
2865 mono_coop_mutex_destroy (&threads_mutex);
2866 mono_os_mutex_destroy (&interlocked_mutex);
2867 mono_os_mutex_destroy (&delayed_free_table_mutex);
2868 mono_os_mutex_destroy (&small_id_mutex);
2869 CloseHandle (background_change_event);
2872 mono_native_tls_free (current_object_key);
2876 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2878 mono_thread_cleanup_fn = func;
2882 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2884 thread->internal_thread->manage_callback = func;
2888 static void print_tids (gpointer key, gpointer value, gpointer user)
2890 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2891 * sizeof(uint) and a cast to uint would overflow
2893 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2894 * print this as a pointer.
2896 g_message ("Waiting for: %p", key);
2901 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2902 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2906 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2910 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2913 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2916 if(ret==WAIT_FAILED) {
2917 /* See the comment in build_wait_tids() */
2918 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2922 for(i=0; i<wait->num; i++)
2923 CloseHandle (wait->handles[i]);
2925 if (ret == WAIT_TIMEOUT)
2928 for(i=0; i<wait->num; i++) {
2929 gsize tid = wait->threads[i]->tid;
2932 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2933 * it can still run io-layer etc. code. So wait for it to really exit.
2934 * FIXME: This won't join threads which are not in the joinable_hash yet.
2936 mono_thread_join ((gpointer)tid);
2938 mono_threads_lock ();
2939 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2940 /* This thread must have been killed, because
2941 * it hasn't cleaned itself up. (It's just
2942 * possible that the thread exited before the
2943 * parent thread had a chance to store the
2944 * handle, and now there is another pointer to
2945 * the already-exited thread stored. In this
2946 * case, we'll just get two
2947 * mono_profiler_thread_end() calls for the
2951 mono_threads_unlock ();
2952 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2953 thread_cleanup (wait->threads[i]);
2955 mono_threads_unlock ();
2960 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2962 guint32 i, ret, count;
2964 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2966 /* Add the thread state change event, so it wakes up if a thread changes
2967 * to background mode.
2970 if (count < MAXIMUM_WAIT_OBJECTS) {
2971 wait->handles [count] = background_change_event;
2976 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2979 if(ret==WAIT_FAILED) {
2980 /* See the comment in build_wait_tids() */
2981 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2985 for(i=0; i<wait->num; i++)
2986 CloseHandle (wait->handles[i]);
2988 if (ret == WAIT_TIMEOUT)
2991 if (ret < wait->num) {
2992 gsize tid = wait->threads[ret]->tid;
2993 mono_threads_lock ();
2994 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2995 /* See comment in wait_for_tids about thread cleanup */
2996 mono_threads_unlock ();
2997 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2998 thread_cleanup (wait->threads [ret]);
3000 mono_threads_unlock ();
3004 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3006 struct wait_data *wait=(struct wait_data *)user;
3008 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
3010 MonoInternalThread *thread=(MonoInternalThread *)value;
3012 /* Ignore background threads, we abort them later */
3013 /* Do not lock here since it is not needed and the caller holds threads_lock */
3014 if (thread->state & ThreadState_Background) {
3015 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3016 return; /* just leave, ignore */
3019 if (mono_gc_is_finalizer_internal_thread (thread)) {
3020 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3024 if (thread == mono_thread_internal_current ()) {
3025 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3029 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3030 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3034 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3035 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3039 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3040 if (handle == NULL) {
3041 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3045 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3046 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3047 wait->handles[wait->num]=handle;
3048 wait->threads[wait->num]=thread;
3051 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3053 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3058 /* Just ignore the rest, we can't do anything with
3065 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3067 struct wait_data *wait=(struct wait_data *)user;
3068 MonoNativeThreadId self = mono_native_thread_id_get ();
3069 MonoInternalThread *thread = (MonoInternalThread *)value;
3072 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3075 /* The finalizer thread is not a background thread */
3076 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3077 && (thread->state & ThreadState_Background) != 0
3078 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3080 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3084 wait->handles[wait->num] = handle;
3085 wait->threads[wait->num] = thread;
3088 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3089 mono_thread_internal_stop (thread);
3093 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3094 && !mono_gc_is_finalizer_internal_thread (thread);
3098 * mono_threads_set_shutting_down:
3100 * Is called by a thread that wants to shut down Mono. If the runtime is already
3101 * shutting down, the calling thread is suspended/stopped, and this function never
3105 mono_threads_set_shutting_down (void)
3107 MonoInternalThread *current_thread = mono_thread_internal_current ();
3109 mono_threads_lock ();
3111 if (shutting_down) {
3112 mono_threads_unlock ();
3114 /* Make sure we're properly suspended/stopped */
3116 LOCK_THREAD (current_thread);
3118 if ((current_thread->state & ThreadState_SuspendRequested) ||
3119 (current_thread->state & ThreadState_AbortRequested) ||
3120 (current_thread->state & ThreadState_StopRequested)) {
3121 UNLOCK_THREAD (current_thread);
3122 mono_thread_execute_interruption ();
3124 current_thread->state |= ThreadState_Stopped;
3125 UNLOCK_THREAD (current_thread);
3128 /*since we're killing the thread, unset the current domain.*/
3129 mono_domain_unset ();
3131 /* Wake up other threads potentially waiting for us */
3132 mono_thread_info_exit ();
3134 shutting_down = TRUE;
3136 /* Not really a background state change, but this will
3137 * interrupt the main thread if it is waiting for all
3138 * the other threads.
3140 SetEvent (background_change_event);
3142 mono_threads_unlock ();
3146 void mono_thread_manage (void)
3148 struct wait_data wait_data;
3149 struct wait_data *wait = &wait_data;
3151 memset (wait, 0, sizeof (struct wait_data));
3152 /* join each thread that's still running */
3153 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3155 mono_threads_lock ();
3157 THREAD_DEBUG (g_message("%s: No threads", __func__));
3158 mono_threads_unlock ();
3161 mono_threads_unlock ();
3164 mono_threads_lock ();
3165 if (shutting_down) {
3166 /* somebody else is shutting down */
3167 mono_threads_unlock ();
3170 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3171 mono_g_hash_table_foreach (threads, print_tids, NULL));
3173 ResetEvent (background_change_event);
3175 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3176 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3177 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3178 mono_threads_unlock ();
3180 /* Something to wait for */
3181 wait_for_tids_or_state_change (wait, INFINITE);
3183 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3184 } while(wait->num>0);
3186 /* Mono is shutting down, so just wait for the end */
3187 if (!mono_runtime_try_shutdown ()) {
3188 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3189 mono_thread_suspend (mono_thread_internal_current ());
3190 mono_thread_execute_interruption ();
3194 * Remove everything but the finalizer thread and self.
3195 * Also abort all the background threads
3198 mono_threads_lock ();
3201 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3202 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3203 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3205 mono_threads_unlock ();
3207 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3209 /* Something to wait for */
3210 wait_for_tids (wait, INFINITE);
3212 } while (wait->num > 0);
3215 * give the subthreads a chance to really quit (this is mainly needed
3216 * to get correct user and system times from getrusage/wait/time(1)).
3217 * This could be removed if we avoid pthread_detach() and use pthread_join().
3219 mono_thread_info_yield ();
3223 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3225 MonoInternalThread *thread = (MonoInternalThread*)value;
3226 struct wait_data *wait = (struct wait_data*)user_data;
3230 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3232 * This needs no locking.
3234 if ((thread->state & ThreadState_Suspended) != 0 ||
3235 (thread->state & ThreadState_Stopped) != 0)
3238 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3239 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3243 wait->handles [wait->num] = handle;
3244 wait->threads [wait->num] = thread;
3250 * mono_thread_suspend_all_other_threads:
3252 * Suspend all managed threads except the finalizer thread and this thread. It is
3253 * not possible to resume them later.
3255 void mono_thread_suspend_all_other_threads (void)
3257 struct wait_data wait_data;
3258 struct wait_data *wait = &wait_data;
3260 MonoNativeThreadId self = mono_native_thread_id_get ();
3261 guint32 eventidx = 0;
3262 gboolean starting, finished;
3264 memset (wait, 0, sizeof (struct wait_data));
3266 * The other threads could be in an arbitrary state at this point, i.e.
3267 * they could be starting up, shutting down etc. This means that there could be
3268 * threads which are not even in the threads hash table yet.
3272 * First we set a barrier which will be checked by all threads before they
3273 * are added to the threads hash table, and they will exit if the flag is set.
3274 * This ensures that no threads could be added to the hash later.
3275 * We will use shutting_down as the barrier for now.
3277 g_assert (shutting_down);
3280 * We make multiple calls to WaitForMultipleObjects since:
3281 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3282 * - some threads could exit without becoming suspended
3287 * Make a copy of the hashtable since we can't do anything with
3288 * threads while threads_mutex is held.
3291 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3292 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3293 mono_threads_lock ();
3294 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3295 mono_threads_unlock ();
3298 /* Get the suspended events that we'll be waiting for */
3299 for (i = 0; i < wait->num; ++i) {
3300 MonoInternalThread *thread = wait->threads [i];
3302 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3303 || mono_gc_is_finalizer_internal_thread (thread)
3304 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3306 //CloseHandle (wait->handles [i]);
3307 wait->threads [i] = NULL; /* ignore this thread in next loop */
3311 LOCK_THREAD (thread);
3313 if ((thread->state & ThreadState_Suspended) != 0 ||
3314 (thread->state & ThreadState_StopRequested) != 0 ||
3315 (thread->state & ThreadState_Stopped) != 0) {
3316 UNLOCK_THREAD (thread);
3317 CloseHandle (wait->handles [i]);
3318 wait->threads [i] = NULL; /* ignore this thread in next loop */
3324 /* Convert abort requests into suspend requests */
3325 if ((thread->state & ThreadState_AbortRequested) != 0)
3326 thread->state &= ~ThreadState_AbortRequested;
3328 thread->state |= ThreadState_SuspendRequested;
3330 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3331 async_suspend_internal (thread, TRUE);
3333 if (eventidx <= 0) {
3335 * If there are threads which are starting up, we wait until they
3336 * are suspended when they try to register in the threads hash.
3337 * This is guaranteed to finish, since the threads which can create new
3338 * threads get suspended after a while.
3339 * FIXME: The finalizer thread can still create new threads.
3341 mono_threads_lock ();
3342 if (threads_starting_up)
3343 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3346 mono_threads_unlock ();
3348 mono_thread_info_sleep (100, NULL);
3356 MonoInternalThread *thread;
3357 MonoStackFrameInfo *frames;
3358 int nframes, max_frames;
3359 int nthreads, max_threads;
3360 MonoInternalThread **threads;
3361 } ThreadDumpUserData;
3363 static gboolean thread_dump_requested;
3365 /* This needs to be async safe */
3367 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3369 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3371 if (ud->nframes < ud->max_frames) {
3372 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3379 /* This needs to be async safe */
3380 static SuspendThreadResult
3381 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3383 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3384 MonoInternalThread *thread = user_data->thread;
3387 /* This no longer works with remote unwinding */
3389 wapi_desc = wapi_current_thread_desc ();
3390 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3395 if (thread == mono_thread_internal_current ())
3396 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3398 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3400 return MonoResumeThread;
3404 int nthreads, max_threads;
3405 MonoInternalThread **threads;
3406 } CollectThreadsUserData;
3409 collect_thread (gpointer key, gpointer value, gpointer user)
3411 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3412 MonoInternalThread *thread = (MonoInternalThread *)value;
3414 if (ud->nthreads < ud->max_threads)
3415 ud->threads [ud->nthreads ++] = thread;
3419 * Collect running threads into the THREADS array.
3420 * THREADS should be an array allocated on the stack.
3423 collect_threads (MonoInternalThread **thread_array, int max_threads)
3425 CollectThreadsUserData ud;
3427 memset (&ud, 0, sizeof (ud));
3428 /* This array contains refs, but its on the stack, so its ok */
3429 ud.threads = thread_array;
3430 ud.max_threads = max_threads;
3432 mono_threads_lock ();
3433 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3434 mono_threads_unlock ();
3440 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3442 GString* text = g_string_new (0);
3444 GError *error = NULL;
3447 ud->thread = thread;
3450 /* Collect frames for the thread */
3451 if (thread == mono_thread_internal_current ()) {
3452 get_thread_dump (mono_thread_info_current (), ud);
3454 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3458 * Do all the non async-safe work outside of get_thread_dump.
3461 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3463 g_string_append_printf (text, "\n\"%s\"", name);
3466 else if (thread->threadpool_thread) {
3467 g_string_append (text, "\n\"<threadpool thread>\"");
3469 g_string_append (text, "\n\"<unnamed thread>\"");
3472 for (i = 0; i < ud->nframes; ++i) {
3473 MonoStackFrameInfo *frame = &ud->frames [i];
3474 MonoMethod *method = NULL;
3476 if (frame->type == FRAME_TYPE_MANAGED)
3477 method = mono_jit_info_get_method (frame->ji);
3480 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3481 g_string_append_printf (text, " %s\n", location);
3484 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3488 fprintf (stdout, "%s", text->str);
3490 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3491 OutputDebugStringA(text->str);
3494 g_string_free (text, TRUE);
3499 mono_threads_perform_thread_dump (void)
3501 ThreadDumpUserData ud;
3502 MonoInternalThread *thread_array [128];
3503 int tindex, nthreads;
3505 if (!thread_dump_requested)
3508 printf ("Full thread dump:\n");
3510 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3511 nthreads = collect_threads (thread_array, 128);
3513 memset (&ud, 0, sizeof (ud));
3514 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3515 ud.max_frames = 256;
3517 for (tindex = 0; tindex < nthreads; ++tindex)
3518 dump_thread (thread_array [tindex], &ud);
3522 thread_dump_requested = FALSE;
3525 /* Obtain the thread dump of all threads */
3527 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3531 ThreadDumpUserData ud;
3532 MonoInternalThread *thread_array [128];
3533 MonoDomain *domain = mono_domain_get ();
3534 MonoDebugSourceLocation *location;
3535 int tindex, nthreads;
3537 mono_error_init (&error);
3539 *out_threads = NULL;
3540 *out_stack_frames = NULL;
3542 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3543 nthreads = collect_threads (thread_array, 128);
3545 memset (&ud, 0, sizeof (ud));
3546 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3547 ud.max_frames = 256;
3549 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, &error);
3550 if (!is_ok (&error))
3552 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, &error);
3553 if (!is_ok (&error))
3556 for (tindex = 0; tindex < nthreads; ++tindex) {
3557 MonoInternalThread *thread = thread_array [tindex];
3558 MonoArray *thread_frames;
3564 /* Collect frames for the thread */
3565 if (thread == mono_thread_internal_current ()) {
3566 get_thread_dump (mono_thread_info_current (), &ud);
3568 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3571 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3573 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, &error);
3574 if (!is_ok (&error))
3576 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3578 for (i = 0; i < ud.nframes; ++i) {
3579 MonoStackFrameInfo *frame = &ud.frames [i];
3580 MonoMethod *method = NULL;
3581 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3582 if (!mono_error_ok (&error))
3585 sf->native_offset = frame->native_offset;
3587 if (frame->type == FRAME_TYPE_MANAGED)
3588 method = mono_jit_info_get_method (frame->ji);
3591 sf->method_address = (gsize) frame->ji->code_start;
3593 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3594 mono_error_raise_exception (&error); /* FIXME don't raise here */
3595 MONO_OBJECT_SETREF (sf, method, rm);
3597 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3599 sf->il_offset = location->il_offset;
3601 if (location && location->source_file) {
3602 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3603 sf->line = location->row;
3604 sf->column = location->column;
3606 mono_debug_free_source_location (location);
3611 mono_array_setref (thread_frames, i, sf);
3617 mono_error_raise_exception (&error); /* FIXME don't raise here */
3621 * mono_threads_request_thread_dump:
3623 * Ask all threads except the current to print their stacktrace to stdout.
3626 mono_threads_request_thread_dump (void)
3628 /*The new thread dump code runs out of the finalizer thread. */
3629 thread_dump_requested = TRUE;
3630 mono_gc_finalize_notify ();
3635 gint allocated; /* +1 so that refs [allocated] == NULL */
3639 typedef struct ref_stack RefStack;
3642 ref_stack_new (gint initial_size)
3646 initial_size = MAX (initial_size, 16) + 1;
3647 rs = g_new0 (RefStack, 1);
3648 rs->refs = g_new0 (gpointer, initial_size);
3649 rs->allocated = initial_size;
3654 ref_stack_destroy (gpointer ptr)
3656 RefStack *rs = (RefStack *)ptr;
3665 ref_stack_push (RefStack *rs, gpointer ptr)
3667 g_assert (rs != NULL);
3669 if (rs->bottom >= rs->allocated) {
3670 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3671 rs->allocated <<= 1;
3672 rs->refs [rs->allocated] = NULL;
3674 rs->refs [rs->bottom++] = ptr;
3678 ref_stack_pop (RefStack *rs)
3680 if (rs == NULL || rs->bottom == 0)
3684 rs->refs [rs->bottom] = NULL;
3688 ref_stack_find (RefStack *rs, gpointer ptr)
3695 for (refs = rs->refs; refs && *refs; refs++) {
3703 * mono_thread_push_appdomain_ref:
3705 * Register that the current thread may have references to objects in domain
3706 * @domain on its stack. Each call to this function should be paired with a
3707 * call to pop_appdomain_ref.
3710 mono_thread_push_appdomain_ref (MonoDomain *domain)
3712 MonoInternalThread *thread = mono_thread_internal_current ();
3715 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3716 SPIN_LOCK (thread->lock_thread_id);
3717 if (thread->appdomain_refs == NULL)
3718 thread->appdomain_refs = ref_stack_new (16);
3719 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3720 SPIN_UNLOCK (thread->lock_thread_id);
3725 mono_thread_pop_appdomain_ref (void)
3727 MonoInternalThread *thread = mono_thread_internal_current ();
3730 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3731 SPIN_LOCK (thread->lock_thread_id);
3732 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3733 SPIN_UNLOCK (thread->lock_thread_id);
3738 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3741 SPIN_LOCK (thread->lock_thread_id);
3742 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3743 SPIN_UNLOCK (thread->lock_thread_id);
3748 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3750 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3753 typedef struct abort_appdomain_data {
3754 struct wait_data wait;
3756 } abort_appdomain_data;
3759 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3761 MonoInternalThread *thread = (MonoInternalThread*)value;
3762 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3763 MonoDomain *domain = data->domain;
3765 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3766 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3768 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3769 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3772 data->wait.handles [data->wait.num] = handle;
3773 data->wait.threads [data->wait.num] = thread;
3776 /* Just ignore the rest, we can't do anything with
3784 * mono_threads_abort_appdomain_threads:
3786 * Abort threads which has references to the given appdomain.
3789 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3791 #ifdef __native_client__
3795 abort_appdomain_data user_data;
3797 int orig_timeout = timeout;
3800 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3802 start_time = mono_msec_ticks ();
3804 mono_threads_lock ();
3806 user_data.domain = domain;
3807 user_data.wait.num = 0;
3808 /* This shouldn't take any locks */
3809 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3810 mono_threads_unlock ();
3812 if (user_data.wait.num > 0) {
3813 /* Abort the threads outside the threads lock */
3814 for (i = 0; i < user_data.wait.num; ++i)
3815 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3818 * We should wait for the threads either to abort, or to leave the
3819 * domain. We can't do the latter, so we wait with a timeout.
3821 wait_for_tids (&user_data.wait, 100);
3824 /* Update remaining time */
3825 timeout -= mono_msec_ticks () - start_time;
3826 start_time = mono_msec_ticks ();
3828 if (orig_timeout != -1 && timeout < 0)
3831 while (user_data.wait.num > 0);
3833 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3839 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3841 MonoInternalThread *thread = (MonoInternalThread*)value;
3842 MonoDomain *domain = (MonoDomain*)user_data;
3845 /* No locking needed here */
3846 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3848 if (thread->cached_culture_info) {
3849 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3850 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3851 if (obj && obj->vtable->domain == domain)
3852 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3858 * mono_threads_clear_cached_culture:
3860 * Clear the cached_current_culture from all threads if it is in the
3864 mono_threads_clear_cached_culture (MonoDomain *domain)
3866 mono_threads_lock ();
3867 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3868 mono_threads_unlock ();
3872 * mono_thread_get_undeniable_exception:
3874 * Return an exception which needs to be raised when leaving a catch clause.
3875 * This is used for undeniable exception propagation.
3878 mono_thread_get_undeniable_exception (void)
3880 MonoInternalThread *thread = mono_thread_internal_current ();
3882 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3884 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3885 * exception if the thread no longer references a dying appdomain.
3887 thread->abort_exc->trace_ips = NULL;
3888 thread->abort_exc->stack_trace = NULL;
3889 return thread->abort_exc;
3895 #if MONO_SMALL_CONFIG
3896 #define NUM_STATIC_DATA_IDX 4
3897 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3901 #define NUM_STATIC_DATA_IDX 8
3902 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3903 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3907 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3908 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3911 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3913 gpointer *static_data = (gpointer *)addr;
3915 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3916 void **ptr = (void **)static_data [i];
3921 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3922 void **p = ptr + idx;
3925 mark_func ((MonoObject**)p, gc_data);
3931 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3933 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3937 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3939 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3943 * mono_alloc_static_data
3945 * Allocate memory blocks for storing threads or context static data
3948 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3950 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3953 gpointer* static_data = *static_data_ptr;
3955 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3956 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3958 if (mono_gc_user_markers_supported ()) {
3959 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3960 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3962 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3963 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3966 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3967 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3968 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3969 *static_data_ptr = static_data;
3970 static_data [0] = static_data;
3973 for (i = 1; i <= idx; ++i) {
3974 if (static_data [i])
3977 if (mono_gc_user_markers_supported ())
3978 static_data [i] = g_malloc0 (static_data_size [i]);
3980 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3981 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3982 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3987 mono_free_static_data (gpointer* static_data)
3990 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3991 gpointer p = static_data [i];
3995 * At this point, the static data pointer array is still registered with the
3996 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3997 * data. Freeing the individual arrays without first nulling their slots
3998 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3999 * such an already freed array. See bug #13813.
4001 static_data [i] = NULL;
4002 mono_memory_write_barrier ();
4003 if (mono_gc_user_markers_supported ())
4006 mono_gc_free_fixed (p);
4008 mono_gc_free_fixed (static_data);
4012 * mono_init_static_data_info
4014 * Initializes static data counters
4016 static void mono_init_static_data_info (StaticDataInfo *static_data)
4018 static_data->idx = 0;
4019 static_data->offset = 0;
4020 static_data->freelist = NULL;
4024 * mono_alloc_static_data_slot
4026 * Generates an offset for static data. static_data contains the counters
4027 * used to generate it.
4030 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4032 if (!static_data->idx && !static_data->offset) {
4034 * we use the first chunk of the first allocation also as
4035 * an array for the rest of the data
4037 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4039 static_data->offset += align - 1;
4040 static_data->offset &= ~(align - 1);
4041 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4042 static_data->idx ++;
4043 g_assert (size <= static_data_size [static_data->idx]);
4044 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4045 static_data->offset = 0;
4047 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4048 static_data->offset += size;
4053 * ensure thread static fields already allocated are valid for thread
4054 * This function is called when a thread is created or on thread attach.
4057 thread_adjust_static_data (MonoInternalThread *thread)
4059 mono_threads_lock ();
4060 if (thread_static_info.offset || thread_static_info.idx > 0) {
4061 /* get the current allocated size */
4062 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4063 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4065 mono_threads_unlock ();
4069 * LOCKING: requires that threads_mutex is held
4072 context_adjust_static_data (MonoAppContext *ctx)
4074 if (context_static_info.offset || context_static_info.idx > 0) {
4075 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4076 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4077 ctx->data->static_data = ctx->static_data;
4082 * LOCKING: requires that threads_mutex is held
4085 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4087 MonoInternalThread *thread = (MonoInternalThread *)value;
4088 guint32 offset = GPOINTER_TO_UINT (user);
4090 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4094 * LOCKING: requires that threads_mutex is held
4097 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4099 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4104 guint32 offset = GPOINTER_TO_UINT (user);
4105 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4106 ctx->data->static_data = ctx->static_data;
4109 static StaticDataFreeList*
4110 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4112 StaticDataFreeList* prev = NULL;
4113 StaticDataFreeList* tmp = static_data->freelist;
4115 if (tmp->size == size) {
4117 prev->next = tmp->next;
4119 static_data->freelist = tmp->next;
4128 #if SIZEOF_VOID_P == 4
4135 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4137 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4139 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4140 MonoBitSet *rb = sets [idx];
4141 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4142 offset /= sizeof (uintptr_t);
4143 /* offset is now the bitmap offset */
4144 for (int i = 0; i < numbits; ++i) {
4145 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4146 mono_bitset_set_fast (rb, offset + i);
4151 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4153 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4154 MonoBitSet *rb = sets [idx];
4155 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4156 offset /= sizeof (uintptr_t);
4157 /* offset is now the bitmap offset */
4158 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4159 mono_bitset_clear_fast (rb, offset + i);
4163 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4165 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4167 StaticDataInfo *info;
4170 if (static_type == SPECIAL_STATIC_THREAD) {
4171 info = &thread_static_info;
4172 sets = thread_reference_bitmaps;
4174 info = &context_static_info;
4175 sets = context_reference_bitmaps;
4178 mono_threads_lock ();
4180 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4184 offset = item->offset;
4187 offset = mono_alloc_static_data_slot (info, size, align);
4190 update_reference_bitmap (sets, offset, bitmap, numbits);
4192 if (static_type == SPECIAL_STATIC_THREAD) {
4193 /* This can be called during startup */
4194 if (threads != NULL)
4195 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4197 if (contexts != NULL)
4198 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4200 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4203 mono_threads_unlock ();
4209 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4211 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4213 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4214 return get_thread_static_data (thread, offset);
4216 return get_context_static_data (thread->current_appcontext, offset);
4221 mono_get_special_static_data (guint32 offset)
4223 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4232 * LOCKING: requires that threads_mutex is held
4235 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4237 MonoInternalThread *thread = (MonoInternalThread *)value;
4238 OffsetSize *data = (OffsetSize *)user;
4239 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4240 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4243 if (!thread->static_data || !thread->static_data [idx])
4245 ptr = ((char*) thread->static_data [idx]) + off;
4246 mono_gc_bzero_atomic (ptr, data->size);
4250 * LOCKING: requires that threads_mutex is held
4253 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4255 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4260 OffsetSize *data = (OffsetSize *)user;
4261 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4262 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4265 if (!ctx->static_data || !ctx->static_data [idx])
4268 ptr = ((char*) ctx->static_data [idx]) + off;
4269 mono_gc_bzero_atomic (ptr, data->size);
4273 do_free_special_slot (guint32 offset, guint32 size)
4275 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4277 StaticDataInfo *info;
4279 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4280 info = &thread_static_info;
4281 sets = thread_reference_bitmaps;
4283 info = &context_static_info;
4284 sets = context_reference_bitmaps;
4287 guint32 data_offset = offset;
4288 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4289 OffsetSize data = { data_offset, size };
4291 clear_reference_bitmap (sets, data.offset, data.size);
4293 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4294 if (threads != NULL)
4295 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4297 if (contexts != NULL)
4298 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4301 if (!mono_runtime_is_shutting_down ()) {
4302 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4304 item->offset = offset;
4307 item->next = info->freelist;
4308 info->freelist = item;
4313 do_free_special (gpointer key, gpointer value, gpointer data)
4315 MonoClassField *field = (MonoClassField *)key;
4316 guint32 offset = GPOINTER_TO_UINT (value);
4319 size = mono_type_size (field->type, &align);
4320 do_free_special_slot (offset, size);
4324 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4326 mono_threads_lock ();
4328 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4330 mono_threads_unlock ();
4334 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4336 /* Only ever called for ThreadLocal instances */
4337 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4339 mono_threads_lock ();
4340 do_free_special_slot (offset, size);
4341 mono_threads_unlock ();
4345 static void CALLBACK dummy_apc (ULONG_PTR param)
4351 * mono_thread_execute_interruption
4353 * Performs the operation that the requested thread state requires (abort,
4356 static MonoException*
4357 mono_thread_execute_interruption (void)
4359 MonoInternalThread *thread = mono_thread_internal_current ();
4360 MonoThread *sys_thread = mono_thread_current ();
4362 LOCK_THREAD (thread);
4364 /* MonoThread::interruption_requested can only be changed with atomics */
4365 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4366 /* this will consume pending APC calls */
4368 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4370 InterlockedDecrement (&thread_interruption_requested);
4372 /* Clear the interrupted flag of the thread so it can wait again */
4373 mono_thread_info_clear_self_interrupt ();
4376 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4377 if (sys_thread->pending_exception) {
4380 exc = sys_thread->pending_exception;
4381 sys_thread->pending_exception = NULL;
4383 UNLOCK_THREAD (thread);
4385 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4386 UNLOCK_THREAD (thread);
4387 g_assert (sys_thread->pending_exception == NULL);
4388 if (thread->abort_exc == NULL) {
4390 * This might be racy, but it has to be called outside the lock
4391 * since it calls managed code.
4393 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4395 return thread->abort_exc;
4397 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4398 /* calls UNLOCK_THREAD (thread) */
4399 self_suspend_internal ();
4402 else if ((thread->state & ThreadState_StopRequested) != 0) {
4403 /* FIXME: do this through the JIT? */
4405 UNLOCK_THREAD (thread);
4407 mono_thread_exit ();
4409 } else if (thread->thread_interrupt_requested) {
4411 thread->thread_interrupt_requested = FALSE;
4412 UNLOCK_THREAD (thread);
4414 return(mono_get_exception_thread_interrupted ());
4417 UNLOCK_THREAD (thread);
4423 * mono_thread_request_interruption
4425 * A signal handler can call this method to request the interruption of a
4426 * thread. The result of the interruption will depend on the current state of
4427 * the thread. If the result is an exception that needs to be throw, it is
4428 * provided as return value.
4431 mono_thread_request_interruption (gboolean running_managed)
4433 MonoInternalThread *thread = mono_thread_internal_current ();
4435 /* The thread may already be stopping */
4440 if (thread->interrupt_on_stop &&
4441 thread->state & ThreadState_StopRequested &&
4442 thread->state & ThreadState_Background)
4446 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4448 InterlockedIncrement (&thread_interruption_requested);
4450 if (!running_managed || is_running_protected_wrapper ()) {
4451 /* Can't stop while in unmanaged code. Increase the global interruption
4452 request count. When exiting the unmanaged method the count will be
4453 checked and the thread will be interrupted. */
4455 /* this will awake the thread if it is in WaitForSingleObject
4457 /* Our implementation of this function ignores the func argument */
4459 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4461 mono_thread_info_self_interrupt ();
4466 return mono_thread_execute_interruption ();
4470 /*This function should be called by a thread after it has exited all of
4471 * its handle blocks at interruption time.*/
4473 mono_thread_resume_interruption (void)
4475 MonoInternalThread *thread = mono_thread_internal_current ();
4476 gboolean still_aborting;
4478 /* The thread may already be stopping */
4482 LOCK_THREAD (thread);
4483 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4484 UNLOCK_THREAD (thread);
4486 /*This can happen if the protected block called Thread::ResetAbort*/
4487 if (!still_aborting)
4490 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4492 InterlockedIncrement (&thread_interruption_requested);
4494 mono_thread_info_self_interrupt ();
4496 return mono_thread_execute_interruption ();
4499 gboolean mono_thread_interruption_requested ()
4501 if (thread_interruption_requested) {
4502 MonoInternalThread *thread = mono_thread_internal_current ();
4503 /* The thread may already be stopping */
4505 return (thread->interruption_requested);
4510 static MonoException*
4511 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4513 MonoInternalThread *thread = mono_thread_internal_current ();
4515 /* The thread may already be stopping */
4519 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4520 MonoException* exc = mono_thread_execute_interruption ();
4528 * Performs the interruption of the current thread, if one has been requested,
4529 * and the thread is not running a protected wrapper.
4530 * Return the exception which needs to be thrown, if any.
4533 mono_thread_interruption_checkpoint (void)
4535 return mono_thread_interruption_checkpoint_request (FALSE);
4539 * Performs the interruption of the current thread, if one has been requested.
4540 * Return the exception which needs to be thrown, if any.
4543 mono_thread_force_interruption_checkpoint_noraise (void)
4545 return mono_thread_interruption_checkpoint_request (TRUE);
4549 * mono_set_pending_exception:
4551 * Set the pending exception of the current thread to EXC.
4552 * The exception will be thrown when execution returns to managed code.
4555 mono_set_pending_exception (MonoException *exc)
4557 MonoThread *thread = mono_thread_current ();
4559 /* The thread may already be stopping */
4563 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4565 mono_thread_request_interruption (FALSE);
4569 * mono_thread_interruption_request_flag:
4571 * Returns the address of a flag that will be non-zero if an interruption has
4572 * been requested for a thread. The thread to interrupt may not be the current
4573 * thread, so an additional call to mono_thread_interruption_requested() or
4574 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4577 gint32* mono_thread_interruption_request_flag ()
4579 return &thread_interruption_requested;
4583 mono_thread_init_apartment_state (void)
4586 MonoInternalThread* thread = mono_thread_internal_current ();
4588 /* Positive return value indicates success, either
4589 * S_OK if this is first CoInitialize call, or
4590 * S_FALSE if CoInitialize already called, but with same
4591 * threading model. A negative value indicates failure,
4592 * probably due to trying to change the threading model.
4594 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4595 ? COINIT_APARTMENTTHREADED
4596 : COINIT_MULTITHREADED) < 0) {
4597 thread->apartment_state = ThreadApartmentState_Unknown;
4603 mono_thread_cleanup_apartment_state (void)
4606 MonoInternalThread* thread = mono_thread_internal_current ();
4608 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4615 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4617 LOCK_THREAD (thread);
4618 thread->state |= state;
4619 UNLOCK_THREAD (thread);
4623 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4625 LOCK_THREAD (thread);
4626 thread->state &= ~state;
4627 UNLOCK_THREAD (thread);
4631 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4633 gboolean ret = FALSE;
4635 LOCK_THREAD (thread);
4637 if ((thread->state & test) != 0) {
4641 UNLOCK_THREAD (thread);
4646 static gboolean has_tls_get = FALSE;
4649 mono_runtime_set_has_tls_get (gboolean val)
4655 mono_runtime_has_tls_get (void)
4661 self_interrupt_thread (void *_unused)
4663 MonoThreadInfo *info = mono_thread_info_current ();
4664 MonoException *exc = mono_thread_execute_interruption ();
4665 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4666 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. */
4667 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4671 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4675 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4679 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4681 MonoJitInfo **dest = (MonoJitInfo **)data;
4687 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4689 MonoJitInfo *ji = NULL;
4694 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4695 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4696 * where we hold runtime locks.
4698 if (!mono_threads_is_coop_enabled ())
4699 mono_thread_info_set_is_async_context (TRUE);
4700 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4701 if (!mono_threads_is_coop_enabled ())
4702 mono_thread_info_set_is_async_context (FALSE);
4707 MonoInternalThread *thread;
4708 gboolean install_async_abort;
4709 MonoThreadInfoInterruptToken *interrupt_token;
4712 static SuspendThreadResult
4713 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4715 AbortThreadData *data = (AbortThreadData *)ud;
4716 MonoInternalThread *thread = data->thread;
4717 MonoJitInfo *ji = NULL;
4718 gboolean protected_wrapper;
4719 gboolean running_managed;
4721 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4722 return MonoResumeThread;
4724 /*someone is already interrupting it*/
4725 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4726 return MonoResumeThread;
4728 InterlockedIncrement (&thread_interruption_requested);
4730 ji = mono_thread_info_get_last_managed (info);
4731 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4732 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4734 if (!protected_wrapper && running_managed) {
4735 /*We are in managed code*/
4736 /*Set the thread to call */
4737 if (data->install_async_abort)
4738 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4739 return MonoResumeThread;
4742 * This will cause waits to be broken.
4743 * It will also prevent the thread from entering a wait, so if the thread returns
4744 * from the wait before it receives the abort signal, it will just spin in the wait
4745 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4748 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4750 return MonoResumeThread;
4755 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4757 AbortThreadData data;
4759 g_assert (thread != mono_thread_internal_current ());
4761 data.thread = thread;
4762 data.install_async_abort = install_async_abort;
4763 data.interrupt_token = NULL;
4765 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4766 if (data.interrupt_token)
4767 mono_thread_info_finish_interrupt (data.interrupt_token);
4768 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4772 self_abort_internal (void)
4776 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4777 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4779 exc = mono_thread_request_interruption (TRUE);
4781 mono_raise_exception (exc);
4783 mono_thread_info_self_interrupt ();
4787 MonoInternalThread *thread;
4789 MonoThreadInfoInterruptToken *interrupt_token;
4790 } SuspendThreadData;
4792 static SuspendThreadResult
4793 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4795 SuspendThreadData *data = (SuspendThreadData *)ud;
4796 MonoInternalThread *thread = data->thread;
4797 MonoJitInfo *ji = NULL;
4798 gboolean protected_wrapper;
4799 gboolean running_managed;
4801 ji = mono_thread_info_get_last_managed (info);
4802 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4803 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4805 if (running_managed && !protected_wrapper) {
4806 thread->state &= ~ThreadState_SuspendRequested;
4807 thread->state |= ThreadState_Suspended;
4808 return KeepSuspended;
4810 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4811 InterlockedIncrement (&thread_interruption_requested);
4812 if (data->interrupt)
4813 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4815 return MonoResumeThread;
4819 /* LOCKING: called with @thread synch_cs held, and releases it */
4821 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4823 SuspendThreadData data;
4825 g_assert (thread != mono_thread_internal_current ());
4827 data.thread = thread;
4828 data.interrupt = interrupt;
4829 data.interrupt_token = NULL;
4831 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4832 if (data.interrupt_token)
4833 mono_thread_info_finish_interrupt (data.interrupt_token);
4835 UNLOCK_THREAD (thread);
4838 /* LOCKING: called with @thread synch_cs held, and releases it */
4840 self_suspend_internal (void)
4842 MonoInternalThread *thread;
4844 thread = mono_thread_internal_current ();
4846 mono_thread_info_begin_self_suspend ();
4847 thread->state &= ~ThreadState_SuspendRequested;
4848 thread->state |= ThreadState_Suspended;
4850 UNLOCK_THREAD (thread);
4852 mono_thread_info_end_self_suspend ();
4856 * mono_thread_is_foreign:
4857 * @thread: the thread to query
4859 * This function allows one to determine if a thread was created by the mono runtime and has
4860 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4862 * Returns: TRUE if @thread was not created by the runtime.
4865 mono_thread_is_foreign (MonoThread *thread)
4867 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4868 return info->runtime_thread == FALSE;
4872 * mono_add_joinable_thread:
4874 * Add TID to the list of joinable threads.
4875 * LOCKING: Acquires the threads lock.
4878 mono_threads_add_joinable_thread (gpointer tid)
4882 * We cannot detach from threads because it causes problems like
4883 * 2fd16f60/r114307. So we collect them and join them when
4884 * we have time (in he finalizer thread).
4886 joinable_threads_lock ();
4887 if (!joinable_threads)
4888 joinable_threads = g_hash_table_new (NULL, NULL);
4889 g_hash_table_insert (joinable_threads, tid, tid);
4890 joinable_thread_count ++;
4891 joinable_threads_unlock ();
4893 mono_gc_finalize_notify ();
4898 * mono_threads_join_threads:
4900 * Join all joinable threads. This is called from the finalizer thread.
4901 * LOCKING: Acquires the threads lock.
4904 mono_threads_join_threads (void)
4907 GHashTableIter iter;
4914 if (!joinable_thread_count)
4918 joinable_threads_lock ();
4920 if (g_hash_table_size (joinable_threads)) {
4921 g_hash_table_iter_init (&iter, joinable_threads);
4922 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4923 thread = (pthread_t)tid;
4924 g_hash_table_remove (joinable_threads, key);
4925 joinable_thread_count --;
4928 joinable_threads_unlock ();
4930 if (thread != pthread_self ())
4931 /* This shouldn't block */
4932 pthread_join (thread, NULL);
4943 * Wait for thread TID to exit.
4944 * LOCKING: Acquires the threads lock.
4947 mono_thread_join (gpointer tid)
4951 gboolean found = FALSE;
4953 joinable_threads_lock ();
4954 if (!joinable_threads)
4955 joinable_threads = g_hash_table_new (NULL, NULL);
4956 if (g_hash_table_lookup (joinable_threads, tid)) {
4957 g_hash_table_remove (joinable_threads, tid);
4958 joinable_thread_count --;
4961 joinable_threads_unlock ();
4964 thread = (pthread_t)tid;
4965 pthread_join (thread, NULL);
4970 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4972 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4973 mono_thread_interruption_checkpoint ();
4976 static inline gboolean
4977 is_appdomainunloaded_exception (MonoClass *klass)
4979 return klass == mono_class_get_appdomain_unloaded_exception_class ();
4982 static inline gboolean
4983 is_threadabort_exception (MonoClass *klass)
4985 return klass == mono_defaults.threadabortexception_class;
4989 mono_thread_internal_unhandled_exception (MonoObject* exc)
4991 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4992 MonoClass *klass = exc->vtable->klass;
4993 if (is_threadabort_exception (klass)) {
4994 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4995 } else if (!is_appdomainunloaded_exception (klass)) {
4996 mono_unhandled_exception (exc);
4997 if (mono_environment_exitcode_get () == 1)
5004 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5006 mono_threads_get_thread_dump (out_threads, out_stack_traces);