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_checked (start_delegate, args, &error);
748 mono_error_raise_exception (&error); /* FIXME don't raise here */
751 /* If the thread calls ExitThread at all, this remaining code
752 * will not be executed, but the main thread will eventually
753 * call thread_cleanup() on this thread's behalf.
756 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
758 /* Do any cleanup needed for apartment state. This
759 * cannot be done in thread_cleanup since thread_cleanup could be
760 * called for a thread other than the current thread.
761 * mono_thread_cleanup_apartment_state cleans up apartment
762 * for the current thead */
763 mono_thread_cleanup_apartment_state ();
765 thread_cleanup (internal);
769 /* Remove the reference to the thread object in the TLS data,
770 * so the thread object can be finalized. This won't be
771 * reached if the thread threw an uncaught exception, so those
772 * thread handles will stay referenced :-( (This is due to
773 * missing support for scanning thread-specific data in the
774 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
777 SET_CURRENT_OBJECT (NULL);
782 static guint32 WINAPI start_wrapper(void *data)
786 /* Avoid scanning the frames above this frame during a GC */
787 mono_gc_set_stack_end ((void*)&dummy);
789 return start_wrapper_internal (data);
795 * Common thread creation code.
796 * LOCKING: Acquires the threads lock.
799 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
802 HANDLE thread_handle;
803 MonoNativeThreadId tid;
804 guint32 create_flags;
807 * Join joinable threads to prevent running out of threads since the finalizer
808 * thread might be blocked/backlogged.
810 mono_threads_join_threads ();
812 mono_error_init (error);
814 mono_threads_lock ();
817 mono_threads_unlock ();
820 if (threads_starting_up == NULL) {
821 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
822 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
824 mono_g_hash_table_insert (threads_starting_up, thread, thread);
825 mono_threads_unlock ();
827 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
828 if (!internal->start_notify) {
829 mono_threads_lock ();
830 mono_g_hash_table_remove (threads_starting_up, thread);
831 mono_threads_unlock ();
832 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
838 stack_size = default_stacksize_for_thread (internal);
840 /* Create suspended, so we can do some housekeeping before the thread
843 create_flags = CREATE_SUSPENDED;
845 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
846 stack_size, create_flags, &tid);
848 if (thread_handle == NULL) {
849 /* The thread couldn't be created, so set an exception */
850 mono_threads_lock ();
851 mono_g_hash_table_remove (threads_starting_up, thread);
852 mono_threads_unlock ();
854 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
857 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
859 internal->handle = thread_handle;
860 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
862 internal->threadpool_thread = threadpool_thread;
863 if (threadpool_thread)
864 mono_thread_set_state (internal, ThreadState_Background);
866 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
868 /* Only store the handle when the thread is about to be
869 * launched, to avoid the main thread deadlocking while trying
870 * to clean up a thread that will never be signalled.
872 if (!handle_store (thread, FALSE))
875 mono_thread_info_resume (tid);
877 if (internal->start_notify) {
879 * Wait for the thread to set up its TLS data etc, so
880 * theres no potential race condition if someone tries
881 * to look up the data believing the thread has
884 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));
887 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
890 CloseHandle (internal->start_notify);
891 internal->start_notify = NULL;
894 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));
899 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
901 if (mono_thread_start_cb) {
902 mono_thread_start_cb (tid, stack_start, func);
906 void mono_threads_set_default_stacksize (guint32 stacksize)
908 default_stacksize = stacksize;
911 guint32 mono_threads_get_default_stacksize (void)
913 return default_stacksize;
917 * mono_thread_create_internal:
919 * ARG should not be a GC reference.
922 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
925 MonoInternalThread *internal;
926 StartInfo *start_info;
929 mono_error_init (error);
931 thread = create_thread_object (domain, error);
932 return_val_if_nok (error, NULL);
934 internal = create_internal_thread (error);
935 return_val_if_nok (error, NULL);
937 MONO_OBJECT_SETREF (thread, internal_thread, internal);
939 start_info = g_new0 (StartInfo, 1);
940 start_info->func = (guint32 (*)(void *))func;
941 start_info->obj = thread;
942 start_info->start_arg = arg;
944 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, error);
945 return_val_if_nok (error, NULL);
947 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
948 #ifndef MONO_CROSS_COMPILE
949 if (mono_check_corlib_version () == NULL)
950 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
957 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
960 if (!mono_thread_create_checked (domain, func, arg, &error))
961 mono_error_cleanup (&error);
965 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
967 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
971 mono_thread_attach (MonoDomain *domain)
974 MonoThread *thread = mono_thread_attach_full (domain, FALSE, &error);
975 mono_error_raise_exception (&error);
981 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach, MonoError *error)
983 MonoThreadInfo *info;
984 MonoInternalThread *thread;
985 MonoThread *current_thread;
986 HANDLE thread_handle;
987 MonoNativeThreadId tid;
989 mono_error_init (error);
991 if ((thread = mono_thread_internal_current ())) {
992 if (domain != mono_domain_get ())
993 mono_domain_set (domain, TRUE);
994 /* Already attached */
995 return mono_thread_current ();
998 if (!mono_gc_register_thread (&domain)) {
999 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 ());
1002 thread = create_internal_thread (error);
1003 if (!mono_error_ok (error))
1006 thread_handle = mono_thread_info_open_handle ();
1007 g_assert (thread_handle);
1009 tid=mono_native_thread_id_get ();
1011 thread->handle = thread_handle;
1012 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
1013 thread->stack_ptr = &tid;
1015 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1017 info = mono_thread_info_current ();
1019 thread->thread_info = info;
1020 thread->small_id = info->small_id;
1022 current_thread = new_thread_with_internal (domain, thread, error);
1023 if (!mono_error_ok (error))
1026 if (!handle_store (current_thread, force_attach)) {
1027 /* Mono is shutting down, so just wait for the end */
1029 mono_thread_info_sleep (10000, NULL);
1032 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
1034 SET_CURRENT_OBJECT (thread);
1035 mono_domain_set (domain, TRUE);
1037 thread_adjust_static_data (thread);
1039 init_root_domain_thread (thread, current_thread, error);
1040 return_val_if_nok (error, NULL);
1042 if (domain != mono_get_root_domain ())
1043 set_current_thread_for_domain (domain, thread, current_thread);
1046 if (mono_thread_attach_cb) {
1050 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1053 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1055 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1058 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1059 if (!info->tools_thread)
1060 // FIXME: Need a separate callback
1061 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1063 return current_thread;
1067 mono_thread_detach_internal (MonoInternalThread *thread)
1069 g_return_if_fail (thread != NULL);
1071 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1073 thread_cleanup (thread);
1075 SET_CURRENT_OBJECT (NULL);
1076 mono_domain_unset ();
1078 /* Don't need to CloseHandle this thread, even though we took a
1079 * reference in mono_thread_attach (), because the GC will do it
1080 * when the Thread object is finalised.
1085 mono_thread_detach (MonoThread *thread)
1088 mono_thread_detach_internal (thread->internal_thread);
1092 * mono_thread_detach_if_exiting:
1094 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1095 * This should be used at the end of embedding code which calls into managed code, and which
1096 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1099 mono_thread_detach_if_exiting (void)
1101 if (mono_thread_info_is_exiting ()) {
1102 MonoInternalThread *thread;
1104 thread = mono_thread_internal_current ();
1106 mono_thread_detach_internal (thread);
1107 mono_thread_info_detach ();
1115 MonoInternalThread *thread = mono_thread_internal_current ();
1117 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1119 thread_cleanup (thread);
1120 SET_CURRENT_OBJECT (NULL);
1121 mono_domain_unset ();
1123 /* we could add a callback here for embedders to use. */
1124 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1125 exit (mono_environment_exitcode_get ());
1126 mono_thread_info_exit ();
1130 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1133 MonoInternalThread *internal;
1135 internal = create_internal_thread (&error);
1136 mono_error_raise_exception (&error);
1138 internal->state = ThreadState_Unstarted;
1140 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1144 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1148 StartInfo *start_info;
1149 MonoInternalThread *internal;
1152 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1154 if (!this_obj->internal_thread)
1155 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1156 internal = this_obj->internal_thread;
1158 LOCK_THREAD (internal);
1160 if ((internal->state & ThreadState_Unstarted) == 0) {
1161 UNLOCK_THREAD (internal);
1162 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1166 if ((internal->state & ThreadState_Aborted) != 0) {
1167 UNLOCK_THREAD (internal);
1170 /* This is freed in start_wrapper */
1171 start_info = g_new0 (StartInfo, 1);
1172 start_info->func = NULL;
1173 start_info->start_arg = NULL;
1174 start_info->delegate = start;
1175 start_info->obj = this_obj;
1176 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1178 res = create_thread (this_obj, internal, start_info, FALSE, 0, &error);
1180 mono_error_cleanup (&error);
1181 UNLOCK_THREAD (internal);
1185 internal->state &= ~ThreadState_Unstarted;
1187 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1189 UNLOCK_THREAD (internal);
1190 return internal->handle;
1194 * This is called from the finalizer of the internal thread object.
1197 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1199 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1202 * Since threads keep a reference to their thread object while running, by the time this function is called,
1203 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1204 * when thread_cleanup () can be called after this.
1207 CloseHandle (thread);
1209 if (this_obj->synch_cs) {
1210 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1211 this_obj->synch_cs = NULL;
1212 mono_coop_mutex_destroy (synch_cs);
1216 if (this_obj->name) {
1217 void *name = this_obj->name;
1218 this_obj->name = NULL;
1224 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1227 MonoInternalThread *thread = mono_thread_internal_current ();
1229 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1231 mono_thread_current_check_pending_interrupt ();
1234 gboolean alerted = FALSE;
1236 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1238 res = mono_thread_info_sleep (ms, &alerted);
1240 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1243 MonoException* exc = mono_thread_execute_interruption ();
1245 mono_raise_exception (exc);
1257 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1262 ves_icall_System_Threading_Thread_GetDomainID (void)
1264 return mono_domain_get()->domain_id;
1268 ves_icall_System_Threading_Thread_Yield (void)
1270 return mono_thread_info_yield ();
1274 * mono_thread_get_name:
1276 * Return the name of the thread. NAME_LEN is set to the length of the name.
1277 * Return NULL if the thread has no name. The returned memory is owned by the
1281 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1285 LOCK_THREAD (this_obj);
1287 if (!this_obj->name) {
1291 *name_len = this_obj->name_len;
1292 res = g_new (gunichar2, this_obj->name_len);
1293 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1296 UNLOCK_THREAD (this_obj);
1302 * mono_thread_get_name_utf8:
1304 * Return the name of the thread in UTF-8.
1305 * Return NULL if the thread has no name.
1306 * The returned memory is owned by the caller.
1309 mono_thread_get_name_utf8 (MonoThread *thread)
1314 MonoInternalThread *internal = thread->internal_thread;
1315 if (internal == NULL)
1318 LOCK_THREAD (internal);
1320 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1322 UNLOCK_THREAD (internal);
1328 * mono_thread_get_managed_id:
1330 * Return the Thread.ManagedThreadId value of `thread`.
1331 * Returns -1 if `thread` is NULL.
1334 mono_thread_get_managed_id (MonoThread *thread)
1339 MonoInternalThread *internal = thread->internal_thread;
1340 if (internal == NULL)
1343 int32_t id = internal->managed_id;
1349 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1354 mono_error_init (&error);
1356 LOCK_THREAD (this_obj);
1358 if (!this_obj->name)
1361 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1363 UNLOCK_THREAD (this_obj);
1365 mono_error_raise_exception (&error);
1371 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1373 LOCK_THREAD (this_obj);
1375 mono_error_init (error);
1377 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1378 UNLOCK_THREAD (this_obj);
1380 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1383 if (this_obj->name) {
1384 g_free (this_obj->name);
1385 this_obj->name_len = 0;
1388 this_obj->name = g_new (gunichar2, mono_string_length (name));
1389 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1390 this_obj->name_len = mono_string_length (name);
1393 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1396 this_obj->name = NULL;
1399 UNLOCK_THREAD (this_obj);
1401 if (this_obj->name && this_obj->tid) {
1402 char *tname = mono_string_to_utf8 (name);
1403 mono_profiler_thread_name (this_obj->tid, tname);
1404 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1410 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1413 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1414 mono_error_set_pending_exception (&error);
1418 * ves_icall_System_Threading_Thread_GetPriority_internal:
1419 * @param this_obj: The MonoInternalThread on which to operate.
1421 * Gets the priority of the given thread.
1422 * @return: The priority of the given thread.
1425 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1428 MonoInternalThread *internal = this_obj->internal_thread;
1430 LOCK_THREAD (internal);
1431 priority = GetThreadPriority (internal->handle) + 2;
1432 UNLOCK_THREAD (internal);
1437 * ves_icall_System_Threading_Thread_SetPriority_internal:
1438 * @param this_obj: The MonoInternalThread on which to operate.
1439 * @param priority: The priority to set.
1441 * Sets the priority of the given thread.
1444 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1446 MonoInternalThread *internal = this_obj->internal_thread;
1448 LOCK_THREAD (internal);
1449 SetThreadPriority (internal->handle, priority - 2);
1450 UNLOCK_THREAD (internal);
1453 /* If the array is already in the requested domain, we just return it,
1454 otherwise we return a copy in that domain. */
1456 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1460 mono_error_init (error);
1464 if (mono_object_domain (arr) == domain)
1467 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1468 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1473 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1476 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1477 mono_error_set_pending_exception (&error);
1482 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1485 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1486 mono_error_set_pending_exception (&error);
1491 mono_thread_current (void)
1494 MonoDomain *domain = mono_domain_get ();
1495 MonoInternalThread *internal = mono_thread_internal_current ();
1496 MonoThread **current_thread_ptr;
1498 g_assert (internal);
1499 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1501 if (!*current_thread_ptr) {
1502 g_assert (domain != mono_get_root_domain ());
1503 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1504 mono_error_raise_exception (&error); /* FIXME don't raise here */
1506 return *current_thread_ptr;
1509 /* Return the thread object belonging to INTERNAL in the current domain */
1511 mono_thread_current_for_thread (MonoInternalThread *internal)
1514 MonoDomain *domain = mono_domain_get ();
1515 MonoThread **current_thread_ptr;
1517 g_assert (internal);
1518 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1520 if (!*current_thread_ptr) {
1521 g_assert (domain != mono_get_root_domain ());
1522 *current_thread_ptr = new_thread_with_internal (domain, internal, &error);
1523 mono_error_raise_exception (&error); /* FIXME don't raise here */
1525 return *current_thread_ptr;
1529 mono_thread_internal_current (void)
1531 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1532 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1537 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1539 MonoInternalThread *thread = this_obj->internal_thread;
1540 HANDLE handle = thread->handle;
1541 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1544 mono_thread_current_check_pending_interrupt ();
1546 LOCK_THREAD (thread);
1548 if ((thread->state & ThreadState_Unstarted) != 0) {
1549 UNLOCK_THREAD (thread);
1551 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1555 UNLOCK_THREAD (thread);
1560 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1562 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1565 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1568 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1570 if(ret==WAIT_OBJECT_0) {
1571 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1576 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1582 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1590 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1594 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1596 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1599 if (ret != WAIT_IO_COMPLETION)
1602 exc = mono_thread_execute_interruption ();
1604 mono_raise_exception (exc);
1609 /* Re-calculate ms according to the time passed */
1610 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1611 if (diff_ms >= ms) {
1615 wait = ms - diff_ms;
1621 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1627 MonoObject *waitHandle;
1628 MonoInternalThread *thread = mono_thread_internal_current ();
1630 /* Do this WaitSleepJoin check before creating objects */
1631 mono_thread_current_check_pending_interrupt ();
1633 /* We fail in managed if the array has more than 64 elements */
1634 numhandles = (guint32)mono_array_length(mono_handles);
1635 handles = g_new0(HANDLE, numhandles);
1637 for(i = 0; i < numhandles; i++) {
1638 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1639 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1646 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1648 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1650 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1654 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1655 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1658 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1660 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1661 uintptr_t numhandles;
1664 MonoObject *waitHandle;
1665 MonoInternalThread *thread = mono_thread_internal_current ();
1667 /* Do this WaitSleepJoin check before creating objects */
1668 mono_thread_current_check_pending_interrupt ();
1670 numhandles = mono_array_length(mono_handles);
1671 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1674 for(i = 0; i < numhandles; i++) {
1675 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1676 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1683 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1685 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1687 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1689 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1692 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1694 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1695 return ret - WAIT_OBJECT_0;
1697 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1698 return ret - WAIT_ABANDONED_0;
1701 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1702 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1706 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1709 MonoInternalThread *thread = mono_thread_internal_current ();
1711 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1717 mono_thread_current_check_pending_interrupt ();
1719 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1721 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1723 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1725 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1726 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1730 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1733 MonoInternalThread *thread = mono_thread_internal_current ();
1738 mono_thread_current_check_pending_interrupt ();
1740 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1743 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1746 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1748 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1749 return ret == WAIT_FAILED ? 0x7fffffff : ret;
1752 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1759 mutex = CreateMutex (NULL, owned, NULL);
1761 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1763 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1771 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1772 return(ReleaseMutex (handle));
1775 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1781 *error = ERROR_SUCCESS;
1783 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1785 *error = GetLastError ();
1792 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1799 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1801 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1802 mono_string_chars (name));
1804 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1812 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1816 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1821 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1825 *error = ERROR_SUCCESS;
1827 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1829 *error = GetLastError ();
1835 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1842 event = CreateEvent (NULL, manual, initial, NULL);
1844 event = CreateEvent (NULL, manual, initial,
1845 mono_string_chars (name));
1847 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1855 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1856 return (SetEvent(handle));
1859 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1860 return (ResetEvent(handle));
1864 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1865 CloseHandle (handle);
1868 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1874 *error = ERROR_SUCCESS;
1876 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1878 *error = GetLastError ();
1884 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1886 return InterlockedIncrement (location);
1889 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1891 #if SIZEOF_VOID_P == 4
1892 if (G_UNLIKELY ((size_t)location & 0x7)) {
1894 mono_interlocked_lock ();
1897 mono_interlocked_unlock ();
1901 return InterlockedIncrement64 (location);
1904 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1906 return InterlockedDecrement(location);
1909 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1911 #if SIZEOF_VOID_P == 4
1912 if (G_UNLIKELY ((size_t)location & 0x7)) {
1914 mono_interlocked_lock ();
1917 mono_interlocked_unlock ();
1921 return InterlockedDecrement64 (location);
1924 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1926 return InterlockedExchange(location, value);
1929 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1932 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1933 mono_gc_wbarrier_generic_nostore (location);
1937 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1939 return InterlockedExchangePointer(location, value);
1942 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1944 IntFloatUnion val, ret;
1947 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1953 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1955 #if SIZEOF_VOID_P == 4
1956 if (G_UNLIKELY ((size_t)location & 0x7)) {
1958 mono_interlocked_lock ();
1961 mono_interlocked_unlock ();
1965 return InterlockedExchange64 (location, value);
1969 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1971 LongDoubleUnion val, ret;
1974 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1979 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1981 return InterlockedCompareExchange(location, value, comparand);
1984 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1986 gint32 r = InterlockedCompareExchange(location, value, comparand);
1987 *success = r == comparand;
1991 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1994 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1995 mono_gc_wbarrier_generic_nostore (location);
1999 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2001 return InterlockedCompareExchangePointer(location, value, comparand);
2004 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2006 IntFloatUnion val, ret, cmp;
2009 cmp.fval = comparand;
2010 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2016 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2018 #if SIZEOF_VOID_P == 8
2019 LongDoubleUnion val, comp, ret;
2022 comp.fval = comparand;
2023 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2029 mono_interlocked_lock ();
2031 if (old == comparand)
2033 mono_interlocked_unlock ();
2040 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2042 #if SIZEOF_VOID_P == 4
2043 if (G_UNLIKELY ((size_t)location & 0x7)) {
2045 mono_interlocked_lock ();
2047 if (old == comparand)
2049 mono_interlocked_unlock ();
2053 return InterlockedCompareExchange64 (location, value, comparand);
2057 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2060 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2061 mono_gc_wbarrier_generic_nostore (location);
2066 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2069 MONO_CHECK_NULL (location, NULL);
2070 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2071 mono_gc_wbarrier_generic_nostore (location);
2076 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2078 return InterlockedAdd (location, value);
2082 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2084 #if SIZEOF_VOID_P == 4
2085 if (G_UNLIKELY ((size_t)location & 0x7)) {
2087 mono_interlocked_lock ();
2090 mono_interlocked_unlock ();
2094 return InterlockedAdd64 (location, value);
2098 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2100 #if SIZEOF_VOID_P == 4
2101 if (G_UNLIKELY ((size_t)location & 0x7)) {
2103 mono_interlocked_lock ();
2105 mono_interlocked_unlock ();
2109 return InterlockedRead64 (location);
2113 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2115 mono_memory_barrier ();
2119 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2121 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2123 if (state & ThreadState_Background) {
2124 /* If the thread changes the background mode, the main thread has to
2125 * be notified, since it has to rebuild the list of threads to
2128 SetEvent (background_change_event);
2133 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2135 mono_thread_set_state (this_obj, (MonoThreadState)state);
2137 if (state & ThreadState_Background) {
2138 /* If the thread changes the background mode, the main thread has to
2139 * be notified, since it has to rebuild the list of threads to
2142 SetEvent (background_change_event);
2147 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2151 LOCK_THREAD (this_obj);
2153 state = this_obj->state;
2155 UNLOCK_THREAD (this_obj);
2160 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2162 MonoInternalThread *current;
2164 MonoInternalThread *thread = this_obj->internal_thread;
2166 LOCK_THREAD (thread);
2168 current = mono_thread_internal_current ();
2170 thread->thread_interrupt_requested = TRUE;
2171 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2173 UNLOCK_THREAD (thread);
2176 async_abort_internal (thread, FALSE);
2180 void mono_thread_current_check_pending_interrupt ()
2182 MonoInternalThread *thread = mono_thread_internal_current ();
2183 gboolean throw_ = FALSE;
2185 LOCK_THREAD (thread);
2187 if (thread->thread_interrupt_requested) {
2189 thread->thread_interrupt_requested = FALSE;
2192 UNLOCK_THREAD (thread);
2195 mono_raise_exception (mono_get_exception_thread_interrupted ());
2200 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2202 LOCK_THREAD (thread);
2204 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2205 (thread->state & ThreadState_StopRequested) != 0 ||
2206 (thread->state & ThreadState_Stopped) != 0)
2208 UNLOCK_THREAD (thread);
2212 if ((thread->state & ThreadState_Unstarted) != 0) {
2213 thread->state |= ThreadState_Aborted;
2214 UNLOCK_THREAD (thread);
2218 thread->state |= ThreadState_AbortRequested;
2219 if (thread->abort_state_handle)
2220 mono_gchandle_free (thread->abort_state_handle);
2222 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2223 g_assert (thread->abort_state_handle);
2225 thread->abort_state_handle = 0;
2227 thread->abort_exc = NULL;
2229 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));
2231 /* During shutdown, we can't wait for other threads */
2233 /* Make sure the thread is awake */
2234 mono_thread_resume (thread);
2236 UNLOCK_THREAD (thread);
2238 if (thread == mono_thread_internal_current ())
2239 self_abort_internal ();
2241 async_abort_internal (thread, TRUE);
2245 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2247 MonoInternalThread *thread = mono_thread_internal_current ();
2248 gboolean was_aborting;
2250 LOCK_THREAD (thread);
2251 was_aborting = thread->state & ThreadState_AbortRequested;
2252 thread->state &= ~ThreadState_AbortRequested;
2253 UNLOCK_THREAD (thread);
2255 if (!was_aborting) {
2256 const char *msg = "Unable to reset abort because no abort was requested";
2257 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2260 thread->abort_exc = NULL;
2261 if (thread->abort_state_handle) {
2262 mono_gchandle_free (thread->abort_state_handle);
2263 /* This is actually not necessary - the handle
2264 only counts if the exception is set */
2265 thread->abort_state_handle = 0;
2270 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2272 LOCK_THREAD (thread);
2274 thread->state &= ~ThreadState_AbortRequested;
2276 if (thread->abort_exc) {
2277 thread->abort_exc = NULL;
2278 if (thread->abort_state_handle) {
2279 mono_gchandle_free (thread->abort_state_handle);
2280 /* This is actually not necessary - the handle
2281 only counts if the exception is set */
2282 thread->abort_state_handle = 0;
2286 UNLOCK_THREAD (thread);
2290 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2293 MonoInternalThread *thread = this_obj->internal_thread;
2294 MonoObject *state, *deserialized = NULL;
2297 if (!thread->abort_state_handle)
2300 state = mono_gchandle_get_target (thread->abort_state_handle);
2303 domain = mono_domain_get ();
2304 if (mono_object_domain (state) == domain)
2307 deserialized = mono_object_xdomain_representation (state, domain, &error);
2309 if (!deserialized) {
2310 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2311 if (!is_ok (&error)) {
2312 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2313 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2315 mono_set_pending_exception (invalid_op_exc);
2319 return deserialized;
2323 mono_thread_suspend (MonoInternalThread *thread)
2325 LOCK_THREAD (thread);
2327 if ((thread->state & ThreadState_Unstarted) != 0 ||
2328 (thread->state & ThreadState_Aborted) != 0 ||
2329 (thread->state & ThreadState_Stopped) != 0)
2331 UNLOCK_THREAD (thread);
2335 if ((thread->state & ThreadState_Suspended) != 0 ||
2336 (thread->state & ThreadState_SuspendRequested) != 0 ||
2337 (thread->state & ThreadState_StopRequested) != 0)
2339 UNLOCK_THREAD (thread);
2343 thread->state |= ThreadState_SuspendRequested;
2345 if (thread == mono_thread_internal_current ()) {
2346 /* calls UNLOCK_THREAD (thread) */
2347 self_suspend_internal ();
2349 /* calls UNLOCK_THREAD (thread) */
2350 async_suspend_internal (thread, FALSE);
2357 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2359 if (!mono_thread_suspend (this_obj->internal_thread)) {
2360 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2365 /* LOCKING: LOCK_THREAD(thread) must be held */
2367 mono_thread_resume (MonoInternalThread *thread)
2369 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2370 thread->state &= ~ThreadState_SuspendRequested;
2374 if ((thread->state & ThreadState_Suspended) == 0 ||
2375 (thread->state & ThreadState_Unstarted) != 0 ||
2376 (thread->state & ThreadState_Aborted) != 0 ||
2377 (thread->state & ThreadState_Stopped) != 0)
2382 UNLOCK_THREAD (thread);
2384 /* Awake the thread */
2385 if (!mono_thread_info_resume (thread_get_tid (thread)))
2388 LOCK_THREAD (thread);
2390 thread->state &= ~ThreadState_Suspended;
2396 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2398 if (!thread->internal_thread) {
2399 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2401 LOCK_THREAD (thread->internal_thread);
2402 if (!mono_thread_resume (thread->internal_thread))
2403 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2404 UNLOCK_THREAD (thread->internal_thread);
2409 mono_threads_is_critical_method (MonoMethod *method)
2411 switch (method->wrapper_type) {
2412 case MONO_WRAPPER_RUNTIME_INVOKE:
2413 case MONO_WRAPPER_XDOMAIN_INVOKE:
2414 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2421 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2426 if (mono_threads_is_critical_method (m)) {
2427 *((gboolean*)data) = TRUE;
2434 is_running_protected_wrapper (void)
2436 gboolean found = FALSE;
2437 mono_stack_walk (find_wrapper, &found);
2441 void mono_thread_internal_stop (MonoInternalThread *thread)
2443 LOCK_THREAD (thread);
2445 if ((thread->state & ThreadState_StopRequested) != 0 ||
2446 (thread->state & ThreadState_Stopped) != 0)
2448 UNLOCK_THREAD (thread);
2452 /* Make sure the thread is awake */
2453 mono_thread_resume (thread);
2455 thread->state |= ThreadState_StopRequested;
2456 thread->state &= ~ThreadState_AbortRequested;
2458 UNLOCK_THREAD (thread);
2460 if (thread == mono_thread_internal_current ())
2461 self_abort_internal ();
2463 async_abort_internal (thread, TRUE);
2466 void mono_thread_stop (MonoThread *thread)
2468 mono_thread_internal_stop (thread->internal_thread);
2472 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2474 gint8 tmp = *(volatile gint8 *)ptr;
2475 mono_memory_barrier ();
2480 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2482 gint16 tmp = *(volatile gint16 *)ptr;
2483 mono_memory_barrier ();
2488 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2490 gint32 tmp = *(volatile gint32 *)ptr;
2491 mono_memory_barrier ();
2496 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2498 gint64 tmp = *(volatile gint64 *)ptr;
2499 mono_memory_barrier ();
2504 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2506 volatile void *tmp = *(volatile void **)ptr;
2507 mono_memory_barrier ();
2508 return (void *) tmp;
2512 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2514 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2515 mono_memory_barrier ();
2516 return (MonoObject *) tmp;
2520 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2522 double tmp = *(volatile double *)ptr;
2523 mono_memory_barrier ();
2528 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2530 float tmp = *(volatile float *)ptr;
2531 mono_memory_barrier ();
2536 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2538 return InterlockedRead8 ((volatile gint8 *)ptr);
2542 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2544 return InterlockedRead16 ((volatile gint16 *)ptr);
2548 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2550 return InterlockedRead ((volatile gint32 *)ptr);
2554 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2556 #if SIZEOF_VOID_P == 4
2557 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2559 mono_interlocked_lock ();
2560 val = *(gint64*)ptr;
2561 mono_interlocked_unlock ();
2565 return InterlockedRead64 ((volatile gint64 *)ptr);
2569 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2571 return InterlockedReadPointer ((volatile gpointer *)ptr);
2575 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2579 #if SIZEOF_VOID_P == 4
2580 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2582 mono_interlocked_lock ();
2583 val = *(double*)ptr;
2584 mono_interlocked_unlock ();
2589 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2595 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2599 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2605 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2607 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2611 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2613 mono_memory_barrier ();
2614 *(volatile gint8 *)ptr = value;
2618 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2620 mono_memory_barrier ();
2621 *(volatile gint16 *)ptr = value;
2625 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2627 mono_memory_barrier ();
2628 *(volatile gint32 *)ptr = value;
2632 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2634 mono_memory_barrier ();
2635 *(volatile gint64 *)ptr = value;
2639 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2641 mono_memory_barrier ();
2642 *(volatile void **)ptr = value;
2646 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2648 mono_memory_barrier ();
2649 mono_gc_wbarrier_generic_store (ptr, value);
2653 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2655 mono_memory_barrier ();
2656 *(volatile double *)ptr = value;
2660 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2662 mono_memory_barrier ();
2663 *(volatile float *)ptr = value;
2667 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2669 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2673 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2675 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2679 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2681 InterlockedWrite ((volatile gint32 *)ptr, value);
2685 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2687 #if SIZEOF_VOID_P == 4
2688 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2689 mono_interlocked_lock ();
2690 *(gint64*)ptr = value;
2691 mono_interlocked_unlock ();
2696 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2700 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2702 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2706 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2710 #if SIZEOF_VOID_P == 4
2711 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2712 mono_interlocked_lock ();
2713 *(double*)ptr = value;
2714 mono_interlocked_unlock ();
2721 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2725 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2731 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2735 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2737 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2741 free_context (void *user_data)
2743 ContextStaticData *data = user_data;
2745 mono_threads_lock ();
2748 * There is no guarantee that, by the point this reference queue callback
2749 * has been invoked, the GC handle associated with the object will fail to
2750 * resolve as one might expect. So if we don't free and remove the GC
2751 * handle here, free_context_static_data_helper () could end up resolving
2752 * a GC handle to an actually-dead context which would contain a pointer
2753 * to an already-freed static data segment, resulting in a crash when
2756 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2758 mono_threads_unlock ();
2760 mono_gchandle_free (data->gc_handle);
2761 mono_free_static_data (data->static_data);
2766 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2768 mono_threads_lock ();
2770 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2773 contexts = g_hash_table_new (NULL, NULL);
2776 context_queue = mono_gc_reference_queue_new (free_context);
2778 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2779 g_hash_table_insert (contexts, gch, gch);
2782 * We use this intermediate structure to contain a duplicate pointer to
2783 * the static data because we can't rely on being able to resolve the GC
2784 * handle in the reference queue callback.
2786 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2787 data->gc_handle = GPOINTER_TO_UINT (gch);
2790 context_adjust_static_data (ctx);
2791 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2793 mono_threads_unlock ();
2795 mono_profiler_context_loaded (ctx);
2799 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2802 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2803 * cleanup in exceptional circumstances, we don't actually do any
2804 * cleanup work here. We instead do this via a reference queue.
2807 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2809 mono_profiler_context_unloaded (ctx);
2813 mono_thread_init_tls (void)
2815 MONO_FAST_TLS_INIT (tls_current_object);
2816 mono_native_tls_alloc (¤t_object_key, NULL);
2819 void mono_thread_init (MonoThreadStartCB start_cb,
2820 MonoThreadAttachCB attach_cb)
2822 mono_coop_mutex_init_recursive (&threads_mutex);
2824 mono_os_mutex_init_recursive(&interlocked_mutex);
2825 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2827 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2828 g_assert(background_change_event != NULL);
2830 mono_init_static_data_info (&thread_static_info);
2831 mono_init_static_data_info (&context_static_info);
2833 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2835 mono_thread_start_cb = start_cb;
2836 mono_thread_attach_cb = attach_cb;
2838 /* Get a pseudo handle to the current process. This is just a
2839 * kludge so that wapi can build a process handle if needed.
2840 * As a pseudo handle is returned, we don't need to clean
2843 GetCurrentProcess ();
2846 void mono_thread_cleanup (void)
2848 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2849 MonoThreadInfo *info;
2851 /* The main thread must abandon any held mutexes (particularly
2852 * important for named mutexes as they are shared across
2853 * processes, see bug 74680.) This will happen when the
2854 * thread exits, but if it's not running in a subthread it
2855 * won't exit in time.
2857 info = mono_thread_info_current ();
2858 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2862 /* This stuff needs more testing, it seems one of these
2863 * critical sections can be locked when mono_thread_cleanup is
2866 mono_coop_mutex_destroy (&threads_mutex);
2867 mono_os_mutex_destroy (&interlocked_mutex);
2868 mono_os_mutex_destroy (&delayed_free_table_mutex);
2869 mono_os_mutex_destroy (&small_id_mutex);
2870 CloseHandle (background_change_event);
2873 mono_native_tls_free (current_object_key);
2877 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2879 mono_thread_cleanup_fn = func;
2883 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2885 thread->internal_thread->manage_callback = func;
2889 static void print_tids (gpointer key, gpointer value, gpointer user)
2891 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2892 * sizeof(uint) and a cast to uint would overflow
2894 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2895 * print this as a pointer.
2897 g_message ("Waiting for: %p", key);
2902 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2903 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2907 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2911 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2914 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2917 if(ret==WAIT_FAILED) {
2918 /* See the comment in build_wait_tids() */
2919 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2923 for(i=0; i<wait->num; i++)
2924 CloseHandle (wait->handles[i]);
2926 if (ret == WAIT_TIMEOUT)
2929 for(i=0; i<wait->num; i++) {
2930 gsize tid = wait->threads[i]->tid;
2933 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2934 * it can still run io-layer etc. code. So wait for it to really exit.
2935 * FIXME: This won't join threads which are not in the joinable_hash yet.
2937 mono_thread_join ((gpointer)tid);
2939 mono_threads_lock ();
2940 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2941 /* This thread must have been killed, because
2942 * it hasn't cleaned itself up. (It's just
2943 * possible that the thread exited before the
2944 * parent thread had a chance to store the
2945 * handle, and now there is another pointer to
2946 * the already-exited thread stored. In this
2947 * case, we'll just get two
2948 * mono_profiler_thread_end() calls for the
2952 mono_threads_unlock ();
2953 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2954 thread_cleanup (wait->threads[i]);
2956 mono_threads_unlock ();
2961 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2963 guint32 i, ret, count;
2965 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2967 /* Add the thread state change event, so it wakes up if a thread changes
2968 * to background mode.
2971 if (count < MAXIMUM_WAIT_OBJECTS) {
2972 wait->handles [count] = background_change_event;
2977 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2980 if(ret==WAIT_FAILED) {
2981 /* See the comment in build_wait_tids() */
2982 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2986 for(i=0; i<wait->num; i++)
2987 CloseHandle (wait->handles[i]);
2989 if (ret == WAIT_TIMEOUT)
2992 if (ret < wait->num) {
2993 gsize tid = wait->threads[ret]->tid;
2994 mono_threads_lock ();
2995 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2996 /* See comment in wait_for_tids about thread cleanup */
2997 mono_threads_unlock ();
2998 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2999 thread_cleanup (wait->threads [ret]);
3001 mono_threads_unlock ();
3005 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3007 struct wait_data *wait=(struct wait_data *)user;
3009 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
3011 MonoInternalThread *thread=(MonoInternalThread *)value;
3013 /* Ignore background threads, we abort them later */
3014 /* Do not lock here since it is not needed and the caller holds threads_lock */
3015 if (thread->state & ThreadState_Background) {
3016 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3017 return; /* just leave, ignore */
3020 if (mono_gc_is_finalizer_internal_thread (thread)) {
3021 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3025 if (thread == mono_thread_internal_current ()) {
3026 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3030 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3031 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3035 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3036 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3040 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3041 if (handle == NULL) {
3042 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3046 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3047 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3048 wait->handles[wait->num]=handle;
3049 wait->threads[wait->num]=thread;
3052 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3054 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3059 /* Just ignore the rest, we can't do anything with
3066 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3068 struct wait_data *wait=(struct wait_data *)user;
3069 MonoNativeThreadId self = mono_native_thread_id_get ();
3070 MonoInternalThread *thread = (MonoInternalThread *)value;
3073 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
3076 /* The finalizer thread is not a background thread */
3077 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3078 && (thread->state & ThreadState_Background) != 0
3079 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3081 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3085 /* printf ("A: %d\n", wait->num); */
3086 wait->handles[wait->num]=thread->handle;
3087 wait->threads[wait->num]=thread;
3090 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3091 mono_thread_internal_stop (thread);
3095 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3096 && !mono_gc_is_finalizer_internal_thread (thread);
3100 * mono_threads_set_shutting_down:
3102 * Is called by a thread that wants to shut down Mono. If the runtime is already
3103 * shutting down, the calling thread is suspended/stopped, and this function never
3107 mono_threads_set_shutting_down (void)
3109 MonoInternalThread *current_thread = mono_thread_internal_current ();
3111 mono_threads_lock ();
3113 if (shutting_down) {
3114 mono_threads_unlock ();
3116 /* Make sure we're properly suspended/stopped */
3118 LOCK_THREAD (current_thread);
3120 if ((current_thread->state & ThreadState_SuspendRequested) ||
3121 (current_thread->state & ThreadState_AbortRequested) ||
3122 (current_thread->state & ThreadState_StopRequested)) {
3123 UNLOCK_THREAD (current_thread);
3124 mono_thread_execute_interruption ();
3126 current_thread->state |= ThreadState_Stopped;
3127 UNLOCK_THREAD (current_thread);
3130 /*since we're killing the thread, unset the current domain.*/
3131 mono_domain_unset ();
3133 /* Wake up other threads potentially waiting for us */
3134 mono_thread_info_exit ();
3136 shutting_down = TRUE;
3138 /* Not really a background state change, but this will
3139 * interrupt the main thread if it is waiting for all
3140 * the other threads.
3142 SetEvent (background_change_event);
3144 mono_threads_unlock ();
3148 void mono_thread_manage (void)
3150 struct wait_data wait_data;
3151 struct wait_data *wait = &wait_data;
3153 memset (wait, 0, sizeof (struct wait_data));
3154 /* join each thread that's still running */
3155 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3157 mono_threads_lock ();
3159 THREAD_DEBUG (g_message("%s: No threads", __func__));
3160 mono_threads_unlock ();
3163 mono_threads_unlock ();
3166 mono_threads_lock ();
3167 if (shutting_down) {
3168 /* somebody else is shutting down */
3169 mono_threads_unlock ();
3172 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3173 mono_g_hash_table_foreach (threads, print_tids, NULL));
3175 ResetEvent (background_change_event);
3177 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3178 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3179 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3180 mono_threads_unlock ();
3182 /* Something to wait for */
3183 wait_for_tids_or_state_change (wait, INFINITE);
3185 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3186 } while(wait->num>0);
3188 /* Mono is shutting down, so just wait for the end */
3189 if (!mono_runtime_try_shutdown ()) {
3190 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3191 mono_thread_suspend (mono_thread_internal_current ());
3192 mono_thread_execute_interruption ();
3196 * Remove everything but the finalizer thread and self.
3197 * Also abort all the background threads
3200 mono_threads_lock ();
3203 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3204 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3205 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3207 mono_threads_unlock ();
3209 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3211 /* Something to wait for */
3212 wait_for_tids (wait, INFINITE);
3214 } while (wait->num > 0);
3217 * give the subthreads a chance to really quit (this is mainly needed
3218 * to get correct user and system times from getrusage/wait/time(1)).
3219 * This could be removed if we avoid pthread_detach() and use pthread_join().
3221 mono_thread_info_yield ();
3225 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3227 MonoInternalThread *thread = (MonoInternalThread*)value;
3228 struct wait_data *wait = (struct wait_data*)user_data;
3232 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3234 * This needs no locking.
3236 if ((thread->state & ThreadState_Suspended) != 0 ||
3237 (thread->state & ThreadState_Stopped) != 0)
3240 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3241 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3245 wait->handles [wait->num] = handle;
3246 wait->threads [wait->num] = thread;
3252 * mono_thread_suspend_all_other_threads:
3254 * Suspend all managed threads except the finalizer thread and this thread. It is
3255 * not possible to resume them later.
3257 void mono_thread_suspend_all_other_threads (void)
3259 struct wait_data wait_data;
3260 struct wait_data *wait = &wait_data;
3262 MonoNativeThreadId self = mono_native_thread_id_get ();
3263 guint32 eventidx = 0;
3264 gboolean starting, finished;
3266 memset (wait, 0, sizeof (struct wait_data));
3268 * The other threads could be in an arbitrary state at this point, i.e.
3269 * they could be starting up, shutting down etc. This means that there could be
3270 * threads which are not even in the threads hash table yet.
3274 * First we set a barrier which will be checked by all threads before they
3275 * are added to the threads hash table, and they will exit if the flag is set.
3276 * This ensures that no threads could be added to the hash later.
3277 * We will use shutting_down as the barrier for now.
3279 g_assert (shutting_down);
3282 * We make multiple calls to WaitForMultipleObjects since:
3283 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3284 * - some threads could exit without becoming suspended
3289 * Make a copy of the hashtable since we can't do anything with
3290 * threads while threads_mutex is held.
3293 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3294 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3295 mono_threads_lock ();
3296 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3297 mono_threads_unlock ();
3300 /* Get the suspended events that we'll be waiting for */
3301 for (i = 0; i < wait->num; ++i) {
3302 MonoInternalThread *thread = wait->threads [i];
3304 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3305 || mono_gc_is_finalizer_internal_thread (thread)
3306 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3308 //CloseHandle (wait->handles [i]);
3309 wait->threads [i] = NULL; /* ignore this thread in next loop */
3313 LOCK_THREAD (thread);
3315 if ((thread->state & ThreadState_Suspended) != 0 ||
3316 (thread->state & ThreadState_StopRequested) != 0 ||
3317 (thread->state & ThreadState_Stopped) != 0) {
3318 UNLOCK_THREAD (thread);
3319 CloseHandle (wait->handles [i]);
3320 wait->threads [i] = NULL; /* ignore this thread in next loop */
3326 /* Convert abort requests into suspend requests */
3327 if ((thread->state & ThreadState_AbortRequested) != 0)
3328 thread->state &= ~ThreadState_AbortRequested;
3330 thread->state |= ThreadState_SuspendRequested;
3332 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3333 async_suspend_internal (thread, TRUE);
3335 if (eventidx <= 0) {
3337 * If there are threads which are starting up, we wait until they
3338 * are suspended when they try to register in the threads hash.
3339 * This is guaranteed to finish, since the threads which can create new
3340 * threads get suspended after a while.
3341 * FIXME: The finalizer thread can still create new threads.
3343 mono_threads_lock ();
3344 if (threads_starting_up)
3345 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3348 mono_threads_unlock ();
3350 mono_thread_info_sleep (100, NULL);
3358 MonoInternalThread *thread;
3359 MonoStackFrameInfo *frames;
3360 int nframes, max_frames;
3361 int nthreads, max_threads;
3362 MonoInternalThread **threads;
3363 } ThreadDumpUserData;
3365 static gboolean thread_dump_requested;
3367 /* This needs to be async safe */
3369 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3371 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3373 if (ud->nframes < ud->max_frames) {
3374 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3381 /* This needs to be async safe */
3382 static SuspendThreadResult
3383 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3385 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3386 MonoInternalThread *thread = user_data->thread;
3389 /* This no longer works with remote unwinding */
3391 wapi_desc = wapi_current_thread_desc ();
3392 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3397 if (thread == mono_thread_internal_current ())
3398 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3400 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3402 return MonoResumeThread;
3406 int nthreads, max_threads;
3407 MonoInternalThread **threads;
3408 } CollectThreadsUserData;
3411 collect_thread (gpointer key, gpointer value, gpointer user)
3413 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3414 MonoInternalThread *thread = (MonoInternalThread *)value;
3416 if (ud->nthreads < ud->max_threads)
3417 ud->threads [ud->nthreads ++] = thread;
3421 * Collect running threads into the THREADS array.
3422 * THREADS should be an array allocated on the stack.
3425 collect_threads (MonoInternalThread **thread_array, int max_threads)
3427 CollectThreadsUserData ud;
3429 memset (&ud, 0, sizeof (ud));
3430 /* This array contains refs, but its on the stack, so its ok */
3431 ud.threads = thread_array;
3432 ud.max_threads = max_threads;
3434 mono_threads_lock ();
3435 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3436 mono_threads_unlock ();
3442 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3444 GString* text = g_string_new (0);
3446 GError *error = NULL;
3449 ud->thread = thread;
3452 /* Collect frames for the thread */
3453 if (thread == mono_thread_internal_current ()) {
3454 get_thread_dump (mono_thread_info_current (), ud);
3456 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3460 * Do all the non async-safe work outside of get_thread_dump.
3463 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3465 g_string_append_printf (text, "\n\"%s\"", name);
3468 else if (thread->threadpool_thread) {
3469 g_string_append (text, "\n\"<threadpool thread>\"");
3471 g_string_append (text, "\n\"<unnamed thread>\"");
3474 for (i = 0; i < ud->nframes; ++i) {
3475 MonoStackFrameInfo *frame = &ud->frames [i];
3476 MonoMethod *method = NULL;
3478 if (frame->type == FRAME_TYPE_MANAGED)
3479 method = mono_jit_info_get_method (frame->ji);
3482 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3483 g_string_append_printf (text, " %s\n", location);
3486 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3490 fprintf (stdout, "%s", text->str);
3492 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3493 OutputDebugStringA(text->str);
3496 g_string_free (text, TRUE);
3501 mono_threads_perform_thread_dump (void)
3503 ThreadDumpUserData ud;
3504 MonoInternalThread *thread_array [128];
3505 int tindex, nthreads;
3507 if (!thread_dump_requested)
3510 printf ("Full thread dump:\n");
3512 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3513 nthreads = collect_threads (thread_array, 128);
3515 memset (&ud, 0, sizeof (ud));
3516 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3517 ud.max_frames = 256;
3519 for (tindex = 0; tindex < nthreads; ++tindex)
3520 dump_thread (thread_array [tindex], &ud);
3524 thread_dump_requested = FALSE;
3527 /* Obtain the thread dump of all threads */
3529 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3533 ThreadDumpUserData ud;
3534 MonoInternalThread *thread_array [128];
3535 MonoDomain *domain = mono_domain_get ();
3536 MonoDebugSourceLocation *location;
3537 int tindex, nthreads;
3539 mono_error_init (&error);
3541 *out_threads = NULL;
3542 *out_stack_frames = NULL;
3544 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3545 nthreads = collect_threads (thread_array, 128);
3547 memset (&ud, 0, sizeof (ud));
3548 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3549 ud.max_frames = 256;
3551 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, &error);
3552 if (!is_ok (&error))
3554 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, &error);
3555 if (!is_ok (&error))
3558 for (tindex = 0; tindex < nthreads; ++tindex) {
3559 MonoInternalThread *thread = thread_array [tindex];
3560 MonoArray *thread_frames;
3566 /* Collect frames for the thread */
3567 if (thread == mono_thread_internal_current ()) {
3568 get_thread_dump (mono_thread_info_current (), &ud);
3570 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3573 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3575 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, &error);
3576 if (!is_ok (&error))
3578 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3580 for (i = 0; i < ud.nframes; ++i) {
3581 MonoStackFrameInfo *frame = &ud.frames [i];
3582 MonoMethod *method = NULL;
3583 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
3584 if (!mono_error_ok (&error))
3587 sf->native_offset = frame->native_offset;
3589 if (frame->type == FRAME_TYPE_MANAGED)
3590 method = mono_jit_info_get_method (frame->ji);
3593 sf->method_address = (gsize) frame->ji->code_start;
3595 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
3596 mono_error_raise_exception (&error); /* FIXME don't raise here */
3597 MONO_OBJECT_SETREF (sf, method, rm);
3599 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3601 sf->il_offset = location->il_offset;
3603 if (location && location->source_file) {
3604 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3605 sf->line = location->row;
3606 sf->column = location->column;
3608 mono_debug_free_source_location (location);
3613 mono_array_setref (thread_frames, i, sf);
3619 mono_error_raise_exception (&error); /* FIXME don't raise here */
3623 * mono_threads_request_thread_dump:
3625 * Ask all threads except the current to print their stacktrace to stdout.
3628 mono_threads_request_thread_dump (void)
3630 /*The new thread dump code runs out of the finalizer thread. */
3631 thread_dump_requested = TRUE;
3632 mono_gc_finalize_notify ();
3637 gint allocated; /* +1 so that refs [allocated] == NULL */
3641 typedef struct ref_stack RefStack;
3644 ref_stack_new (gint initial_size)
3648 initial_size = MAX (initial_size, 16) + 1;
3649 rs = g_new0 (RefStack, 1);
3650 rs->refs = g_new0 (gpointer, initial_size);
3651 rs->allocated = initial_size;
3656 ref_stack_destroy (gpointer ptr)
3658 RefStack *rs = (RefStack *)ptr;
3667 ref_stack_push (RefStack *rs, gpointer ptr)
3669 g_assert (rs != NULL);
3671 if (rs->bottom >= rs->allocated) {
3672 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3673 rs->allocated <<= 1;
3674 rs->refs [rs->allocated] = NULL;
3676 rs->refs [rs->bottom++] = ptr;
3680 ref_stack_pop (RefStack *rs)
3682 if (rs == NULL || rs->bottom == 0)
3686 rs->refs [rs->bottom] = NULL;
3690 ref_stack_find (RefStack *rs, gpointer ptr)
3697 for (refs = rs->refs; refs && *refs; refs++) {
3705 * mono_thread_push_appdomain_ref:
3707 * Register that the current thread may have references to objects in domain
3708 * @domain on its stack. Each call to this function should be paired with a
3709 * call to pop_appdomain_ref.
3712 mono_thread_push_appdomain_ref (MonoDomain *domain)
3714 MonoInternalThread *thread = mono_thread_internal_current ();
3717 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3718 SPIN_LOCK (thread->lock_thread_id);
3719 if (thread->appdomain_refs == NULL)
3720 thread->appdomain_refs = ref_stack_new (16);
3721 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3722 SPIN_UNLOCK (thread->lock_thread_id);
3727 mono_thread_pop_appdomain_ref (void)
3729 MonoInternalThread *thread = mono_thread_internal_current ();
3732 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3733 SPIN_LOCK (thread->lock_thread_id);
3734 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3735 SPIN_UNLOCK (thread->lock_thread_id);
3740 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3743 SPIN_LOCK (thread->lock_thread_id);
3744 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3745 SPIN_UNLOCK (thread->lock_thread_id);
3750 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3752 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3755 typedef struct abort_appdomain_data {
3756 struct wait_data wait;
3758 } abort_appdomain_data;
3761 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3763 MonoInternalThread *thread = (MonoInternalThread*)value;
3764 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3765 MonoDomain *domain = data->domain;
3767 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3768 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3770 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3771 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3774 data->wait.handles [data->wait.num] = handle;
3775 data->wait.threads [data->wait.num] = thread;
3778 /* Just ignore the rest, we can't do anything with
3786 * mono_threads_abort_appdomain_threads:
3788 * Abort threads which has references to the given appdomain.
3791 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3793 #ifdef __native_client__
3797 abort_appdomain_data user_data;
3799 int orig_timeout = timeout;
3802 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3804 start_time = mono_msec_ticks ();
3806 mono_threads_lock ();
3808 user_data.domain = domain;
3809 user_data.wait.num = 0;
3810 /* This shouldn't take any locks */
3811 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3812 mono_threads_unlock ();
3814 if (user_data.wait.num > 0) {
3815 /* Abort the threads outside the threads lock */
3816 for (i = 0; i < user_data.wait.num; ++i)
3817 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3820 * We should wait for the threads either to abort, or to leave the
3821 * domain. We can't do the latter, so we wait with a timeout.
3823 wait_for_tids (&user_data.wait, 100);
3826 /* Update remaining time */
3827 timeout -= mono_msec_ticks () - start_time;
3828 start_time = mono_msec_ticks ();
3830 if (orig_timeout != -1 && timeout < 0)
3833 while (user_data.wait.num > 0);
3835 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3841 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3843 MonoInternalThread *thread = (MonoInternalThread*)value;
3844 MonoDomain *domain = (MonoDomain*)user_data;
3847 /* No locking needed here */
3848 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3850 if (thread->cached_culture_info) {
3851 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3852 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3853 if (obj && obj->vtable->domain == domain)
3854 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3860 * mono_threads_clear_cached_culture:
3862 * Clear the cached_current_culture from all threads if it is in the
3866 mono_threads_clear_cached_culture (MonoDomain *domain)
3868 mono_threads_lock ();
3869 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3870 mono_threads_unlock ();
3874 * mono_thread_get_undeniable_exception:
3876 * Return an exception which needs to be raised when leaving a catch clause.
3877 * This is used for undeniable exception propagation.
3880 mono_thread_get_undeniable_exception (void)
3882 MonoInternalThread *thread = mono_thread_internal_current ();
3884 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3886 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3887 * exception if the thread no longer references a dying appdomain.
3889 thread->abort_exc->trace_ips = NULL;
3890 thread->abort_exc->stack_trace = NULL;
3891 return thread->abort_exc;
3897 #if MONO_SMALL_CONFIG
3898 #define NUM_STATIC_DATA_IDX 4
3899 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3903 #define NUM_STATIC_DATA_IDX 8
3904 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3905 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3909 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3910 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3913 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3915 gpointer *static_data = (gpointer *)addr;
3917 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3918 void **ptr = (void **)static_data [i];
3923 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3924 void **p = ptr + idx;
3927 mark_func ((MonoObject**)p, gc_data);
3933 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3935 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3939 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3941 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3945 * mono_alloc_static_data
3947 * Allocate memory blocks for storing threads or context static data
3950 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3952 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3955 gpointer* static_data = *static_data_ptr;
3957 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3958 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3960 if (mono_gc_user_markers_supported ()) {
3961 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3962 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3964 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3965 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3968 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3969 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3970 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3971 *static_data_ptr = static_data;
3972 static_data [0] = static_data;
3975 for (i = 1; i <= idx; ++i) {
3976 if (static_data [i])
3979 if (mono_gc_user_markers_supported ())
3980 static_data [i] = g_malloc0 (static_data_size [i]);
3982 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3983 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3984 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3989 mono_free_static_data (gpointer* static_data)
3992 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3993 gpointer p = static_data [i];
3997 * At this point, the static data pointer array is still registered with the
3998 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3999 * data. Freeing the individual arrays without first nulling their slots
4000 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4001 * such an already freed array. See bug #13813.
4003 static_data [i] = NULL;
4004 mono_memory_write_barrier ();
4005 if (mono_gc_user_markers_supported ())
4008 mono_gc_free_fixed (p);
4010 mono_gc_free_fixed (static_data);
4014 * mono_init_static_data_info
4016 * Initializes static data counters
4018 static void mono_init_static_data_info (StaticDataInfo *static_data)
4020 static_data->idx = 0;
4021 static_data->offset = 0;
4022 static_data->freelist = NULL;
4026 * mono_alloc_static_data_slot
4028 * Generates an offset for static data. static_data contains the counters
4029 * used to generate it.
4032 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4034 if (!static_data->idx && !static_data->offset) {
4036 * we use the first chunk of the first allocation also as
4037 * an array for the rest of the data
4039 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4041 static_data->offset += align - 1;
4042 static_data->offset &= ~(align - 1);
4043 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4044 static_data->idx ++;
4045 g_assert (size <= static_data_size [static_data->idx]);
4046 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4047 static_data->offset = 0;
4049 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4050 static_data->offset += size;
4055 * ensure thread static fields already allocated are valid for thread
4056 * This function is called when a thread is created or on thread attach.
4059 thread_adjust_static_data (MonoInternalThread *thread)
4061 mono_threads_lock ();
4062 if (thread_static_info.offset || thread_static_info.idx > 0) {
4063 /* get the current allocated size */
4064 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
4065 mono_alloc_static_data (&thread->static_data, offset, TRUE);
4067 mono_threads_unlock ();
4071 * LOCKING: requires that threads_mutex is held
4074 context_adjust_static_data (MonoAppContext *ctx)
4076 if (context_static_info.offset || context_static_info.idx > 0) {
4077 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4078 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4079 ctx->data->static_data = ctx->static_data;
4084 * LOCKING: requires that threads_mutex is held
4087 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4089 MonoInternalThread *thread = (MonoInternalThread *)value;
4090 guint32 offset = GPOINTER_TO_UINT (user);
4092 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4096 * LOCKING: requires that threads_mutex is held
4099 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4101 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4106 guint32 offset = GPOINTER_TO_UINT (user);
4107 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4108 ctx->data->static_data = ctx->static_data;
4111 static StaticDataFreeList*
4112 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4114 StaticDataFreeList* prev = NULL;
4115 StaticDataFreeList* tmp = static_data->freelist;
4117 if (tmp->size == size) {
4119 prev->next = tmp->next;
4121 static_data->freelist = tmp->next;
4130 #if SIZEOF_VOID_P == 4
4137 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4139 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4141 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4142 MonoBitSet *rb = sets [idx];
4143 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4144 offset /= sizeof (uintptr_t);
4145 /* offset is now the bitmap offset */
4146 for (int i = 0; i < numbits; ++i) {
4147 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4148 mono_bitset_set_fast (rb, offset + i);
4153 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4155 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4156 MonoBitSet *rb = sets [idx];
4157 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4158 offset /= sizeof (uintptr_t);
4159 /* offset is now the bitmap offset */
4160 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4161 mono_bitset_clear_fast (rb, offset + i);
4165 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4167 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4169 StaticDataInfo *info;
4172 if (static_type == SPECIAL_STATIC_THREAD) {
4173 info = &thread_static_info;
4174 sets = thread_reference_bitmaps;
4176 info = &context_static_info;
4177 sets = context_reference_bitmaps;
4180 mono_threads_lock ();
4182 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4186 offset = item->offset;
4189 offset = mono_alloc_static_data_slot (info, size, align);
4192 update_reference_bitmap (sets, offset, bitmap, numbits);
4194 if (static_type == SPECIAL_STATIC_THREAD) {
4195 /* This can be called during startup */
4196 if (threads != NULL)
4197 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4199 if (contexts != NULL)
4200 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4202 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4205 mono_threads_unlock ();
4211 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4213 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4215 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4216 return get_thread_static_data (thread, offset);
4218 return get_context_static_data (thread->current_appcontext, offset);
4223 mono_get_special_static_data (guint32 offset)
4225 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4234 * LOCKING: requires that threads_mutex is held
4237 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4239 MonoInternalThread *thread = (MonoInternalThread *)value;
4240 OffsetSize *data = (OffsetSize *)user;
4241 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4242 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4245 if (!thread->static_data || !thread->static_data [idx])
4247 ptr = ((char*) thread->static_data [idx]) + off;
4248 mono_gc_bzero_atomic (ptr, data->size);
4252 * LOCKING: requires that threads_mutex is held
4255 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4257 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4262 OffsetSize *data = (OffsetSize *)user;
4263 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4264 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4267 if (!ctx->static_data || !ctx->static_data [idx])
4270 ptr = ((char*) ctx->static_data [idx]) + off;
4271 mono_gc_bzero_atomic (ptr, data->size);
4275 do_free_special_slot (guint32 offset, guint32 size)
4277 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4279 StaticDataInfo *info;
4281 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4282 info = &thread_static_info;
4283 sets = thread_reference_bitmaps;
4285 info = &context_static_info;
4286 sets = context_reference_bitmaps;
4289 guint32 data_offset = offset;
4290 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4291 OffsetSize data = { data_offset, size };
4293 clear_reference_bitmap (sets, data.offset, data.size);
4295 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4296 if (threads != NULL)
4297 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4299 if (contexts != NULL)
4300 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4303 if (!mono_runtime_is_shutting_down ()) {
4304 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4306 item->offset = offset;
4309 item->next = info->freelist;
4310 info->freelist = item;
4315 do_free_special (gpointer key, gpointer value, gpointer data)
4317 MonoClassField *field = (MonoClassField *)key;
4318 guint32 offset = GPOINTER_TO_UINT (value);
4321 size = mono_type_size (field->type, &align);
4322 do_free_special_slot (offset, size);
4326 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4328 mono_threads_lock ();
4330 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4332 mono_threads_unlock ();
4336 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4338 /* Only ever called for ThreadLocal instances */
4339 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4341 mono_threads_lock ();
4342 do_free_special_slot (offset, size);
4343 mono_threads_unlock ();
4347 static void CALLBACK dummy_apc (ULONG_PTR param)
4353 * mono_thread_execute_interruption
4355 * Performs the operation that the requested thread state requires (abort,
4358 static MonoException*
4359 mono_thread_execute_interruption (void)
4361 MonoInternalThread *thread = mono_thread_internal_current ();
4362 MonoThread *sys_thread = mono_thread_current ();
4364 LOCK_THREAD (thread);
4366 /* MonoThread::interruption_requested can only be changed with atomics */
4367 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4368 /* this will consume pending APC calls */
4370 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4372 InterlockedDecrement (&thread_interruption_requested);
4374 /* Clear the interrupted flag of the thread so it can wait again */
4375 mono_thread_info_clear_self_interrupt ();
4378 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4379 if (sys_thread->pending_exception) {
4382 exc = sys_thread->pending_exception;
4383 sys_thread->pending_exception = NULL;
4385 UNLOCK_THREAD (thread);
4387 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4388 UNLOCK_THREAD (thread);
4389 g_assert (sys_thread->pending_exception == NULL);
4390 if (thread->abort_exc == NULL) {
4392 * This might be racy, but it has to be called outside the lock
4393 * since it calls managed code.
4395 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4397 return thread->abort_exc;
4399 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4400 /* calls UNLOCK_THREAD (thread) */
4401 self_suspend_internal ();
4404 else if ((thread->state & ThreadState_StopRequested) != 0) {
4405 /* FIXME: do this through the JIT? */
4407 UNLOCK_THREAD (thread);
4409 mono_thread_exit ();
4411 } else if (thread->thread_interrupt_requested) {
4413 thread->thread_interrupt_requested = FALSE;
4414 UNLOCK_THREAD (thread);
4416 return(mono_get_exception_thread_interrupted ());
4419 UNLOCK_THREAD (thread);
4425 * mono_thread_request_interruption
4427 * A signal handler can call this method to request the interruption of a
4428 * thread. The result of the interruption will depend on the current state of
4429 * the thread. If the result is an exception that needs to be throw, it is
4430 * provided as return value.
4433 mono_thread_request_interruption (gboolean running_managed)
4435 MonoInternalThread *thread = mono_thread_internal_current ();
4437 /* The thread may already be stopping */
4442 if (thread->interrupt_on_stop &&
4443 thread->state & ThreadState_StopRequested &&
4444 thread->state & ThreadState_Background)
4448 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4450 InterlockedIncrement (&thread_interruption_requested);
4452 if (!running_managed || is_running_protected_wrapper ()) {
4453 /* Can't stop while in unmanaged code. Increase the global interruption
4454 request count. When exiting the unmanaged method the count will be
4455 checked and the thread will be interrupted. */
4457 /* this will awake the thread if it is in WaitForSingleObject
4459 /* Our implementation of this function ignores the func argument */
4461 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4463 mono_thread_info_self_interrupt ();
4468 return mono_thread_execute_interruption ();
4472 /*This function should be called by a thread after it has exited all of
4473 * its handle blocks at interruption time.*/
4475 mono_thread_resume_interruption (void)
4477 MonoInternalThread *thread = mono_thread_internal_current ();
4478 gboolean still_aborting;
4480 /* The thread may already be stopping */
4484 LOCK_THREAD (thread);
4485 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4486 UNLOCK_THREAD (thread);
4488 /*This can happen if the protected block called Thread::ResetAbort*/
4489 if (!still_aborting)
4492 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4494 InterlockedIncrement (&thread_interruption_requested);
4496 mono_thread_info_self_interrupt ();
4498 return mono_thread_execute_interruption ();
4501 gboolean mono_thread_interruption_requested ()
4503 if (thread_interruption_requested) {
4504 MonoInternalThread *thread = mono_thread_internal_current ();
4505 /* The thread may already be stopping */
4507 return (thread->interruption_requested);
4512 static MonoException*
4513 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4515 MonoInternalThread *thread = mono_thread_internal_current ();
4517 /* The thread may already be stopping */
4521 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4522 MonoException* exc = mono_thread_execute_interruption ();
4530 * Performs the interruption of the current thread, if one has been requested,
4531 * and the thread is not running a protected wrapper.
4532 * Return the exception which needs to be thrown, if any.
4535 mono_thread_interruption_checkpoint (void)
4537 return mono_thread_interruption_checkpoint_request (FALSE);
4541 * Performs the interruption of the current thread, if one has been requested.
4542 * Return the exception which needs to be thrown, if any.
4545 mono_thread_force_interruption_checkpoint_noraise (void)
4547 return mono_thread_interruption_checkpoint_request (TRUE);
4551 * mono_set_pending_exception:
4553 * Set the pending exception of the current thread to EXC.
4554 * The exception will be thrown when execution returns to managed code.
4557 mono_set_pending_exception (MonoException *exc)
4559 MonoThread *thread = mono_thread_current ();
4561 /* The thread may already be stopping */
4565 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4567 mono_thread_request_interruption (FALSE);
4571 * mono_thread_interruption_request_flag:
4573 * Returns the address of a flag that will be non-zero if an interruption has
4574 * been requested for a thread. The thread to interrupt may not be the current
4575 * thread, so an additional call to mono_thread_interruption_requested() or
4576 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4579 gint32* mono_thread_interruption_request_flag ()
4581 return &thread_interruption_requested;
4585 mono_thread_init_apartment_state (void)
4588 MonoInternalThread* thread = mono_thread_internal_current ();
4590 /* Positive return value indicates success, either
4591 * S_OK if this is first CoInitialize call, or
4592 * S_FALSE if CoInitialize already called, but with same
4593 * threading model. A negative value indicates failure,
4594 * probably due to trying to change the threading model.
4596 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4597 ? COINIT_APARTMENTTHREADED
4598 : COINIT_MULTITHREADED) < 0) {
4599 thread->apartment_state = ThreadApartmentState_Unknown;
4605 mono_thread_cleanup_apartment_state (void)
4608 MonoInternalThread* thread = mono_thread_internal_current ();
4610 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4617 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4619 LOCK_THREAD (thread);
4620 thread->state |= state;
4621 UNLOCK_THREAD (thread);
4625 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4627 LOCK_THREAD (thread);
4628 thread->state &= ~state;
4629 UNLOCK_THREAD (thread);
4633 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4635 gboolean ret = FALSE;
4637 LOCK_THREAD (thread);
4639 if ((thread->state & test) != 0) {
4643 UNLOCK_THREAD (thread);
4648 static gboolean has_tls_get = FALSE;
4651 mono_runtime_set_has_tls_get (gboolean val)
4657 mono_runtime_has_tls_get (void)
4663 self_interrupt_thread (void *_unused)
4665 MonoThreadInfo *info = mono_thread_info_current ();
4666 MonoException *exc = mono_thread_execute_interruption ();
4667 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4668 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. */
4669 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4673 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4677 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4681 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4683 MonoJitInfo **dest = (MonoJitInfo **)data;
4689 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4691 MonoJitInfo *ji = NULL;
4696 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4697 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4698 * where we hold runtime locks.
4700 if (!mono_threads_is_coop_enabled ())
4701 mono_thread_info_set_is_async_context (TRUE);
4702 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4703 if (!mono_threads_is_coop_enabled ())
4704 mono_thread_info_set_is_async_context (FALSE);
4709 MonoInternalThread *thread;
4710 gboolean install_async_abort;
4711 MonoThreadInfoInterruptToken *interrupt_token;
4714 static SuspendThreadResult
4715 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4717 AbortThreadData *data = (AbortThreadData *)ud;
4718 MonoInternalThread *thread = data->thread;
4719 MonoJitInfo *ji = NULL;
4720 gboolean protected_wrapper;
4721 gboolean running_managed;
4723 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4724 return MonoResumeThread;
4726 /*someone is already interrupting it*/
4727 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4728 return MonoResumeThread;
4730 InterlockedIncrement (&thread_interruption_requested);
4732 ji = mono_thread_info_get_last_managed (info);
4733 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4734 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4736 if (!protected_wrapper && running_managed) {
4737 /*We are in managed code*/
4738 /*Set the thread to call */
4739 if (data->install_async_abort)
4740 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4741 return MonoResumeThread;
4744 * This will cause waits to be broken.
4745 * It will also prevent the thread from entering a wait, so if the thread returns
4746 * from the wait before it receives the abort signal, it will just spin in the wait
4747 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4750 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4752 return MonoResumeThread;
4757 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4759 AbortThreadData data;
4761 g_assert (thread != mono_thread_internal_current ());
4763 data.thread = thread;
4764 data.install_async_abort = install_async_abort;
4765 data.interrupt_token = NULL;
4767 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4768 if (data.interrupt_token)
4769 mono_thread_info_finish_interrupt (data.interrupt_token);
4770 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4774 self_abort_internal (void)
4778 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4779 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4781 exc = mono_thread_request_interruption (TRUE);
4783 mono_raise_exception (exc);
4785 mono_thread_info_self_interrupt ();
4789 MonoInternalThread *thread;
4791 MonoThreadInfoInterruptToken *interrupt_token;
4792 } SuspendThreadData;
4794 static SuspendThreadResult
4795 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4797 SuspendThreadData *data = (SuspendThreadData *)ud;
4798 MonoInternalThread *thread = data->thread;
4799 MonoJitInfo *ji = NULL;
4800 gboolean protected_wrapper;
4801 gboolean running_managed;
4803 ji = mono_thread_info_get_last_managed (info);
4804 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4805 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4807 if (running_managed && !protected_wrapper) {
4808 thread->state &= ~ThreadState_SuspendRequested;
4809 thread->state |= ThreadState_Suspended;
4810 return KeepSuspended;
4812 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4813 InterlockedIncrement (&thread_interruption_requested);
4814 if (data->interrupt)
4815 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4817 return MonoResumeThread;
4821 /* LOCKING: called with @thread synch_cs held, and releases it */
4823 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4825 SuspendThreadData data;
4827 g_assert (thread != mono_thread_internal_current ());
4829 data.thread = thread;
4830 data.interrupt = interrupt;
4831 data.interrupt_token = NULL;
4833 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4834 if (data.interrupt_token)
4835 mono_thread_info_finish_interrupt (data.interrupt_token);
4837 UNLOCK_THREAD (thread);
4840 /* LOCKING: called with @thread synch_cs held, and releases it */
4842 self_suspend_internal (void)
4844 MonoInternalThread *thread;
4846 thread = mono_thread_internal_current ();
4848 mono_thread_info_begin_self_suspend ();
4849 thread->state &= ~ThreadState_SuspendRequested;
4850 thread->state |= ThreadState_Suspended;
4852 UNLOCK_THREAD (thread);
4854 mono_thread_info_end_self_suspend ();
4858 * mono_thread_is_foreign:
4859 * @thread: the thread to query
4861 * This function allows one to determine if a thread was created by the mono runtime and has
4862 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4864 * Returns: TRUE if @thread was not created by the runtime.
4867 mono_thread_is_foreign (MonoThread *thread)
4869 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4870 return info->runtime_thread == FALSE;
4874 * mono_add_joinable_thread:
4876 * Add TID to the list of joinable threads.
4877 * LOCKING: Acquires the threads lock.
4880 mono_threads_add_joinable_thread (gpointer tid)
4884 * We cannot detach from threads because it causes problems like
4885 * 2fd16f60/r114307. So we collect them and join them when
4886 * we have time (in he finalizer thread).
4888 joinable_threads_lock ();
4889 if (!joinable_threads)
4890 joinable_threads = g_hash_table_new (NULL, NULL);
4891 g_hash_table_insert (joinable_threads, tid, tid);
4892 joinable_thread_count ++;
4893 joinable_threads_unlock ();
4895 mono_gc_finalize_notify ();
4900 * mono_threads_join_threads:
4902 * Join all joinable threads. This is called from the finalizer thread.
4903 * LOCKING: Acquires the threads lock.
4906 mono_threads_join_threads (void)
4909 GHashTableIter iter;
4916 if (!joinable_thread_count)
4920 joinable_threads_lock ();
4922 if (g_hash_table_size (joinable_threads)) {
4923 g_hash_table_iter_init (&iter, joinable_threads);
4924 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4925 thread = (pthread_t)tid;
4926 g_hash_table_remove (joinable_threads, key);
4927 joinable_thread_count --;
4930 joinable_threads_unlock ();
4932 if (thread != pthread_self ())
4933 /* This shouldn't block */
4934 pthread_join (thread, NULL);
4945 * Wait for thread TID to exit.
4946 * LOCKING: Acquires the threads lock.
4949 mono_thread_join (gpointer tid)
4953 gboolean found = FALSE;
4955 joinable_threads_lock ();
4956 if (!joinable_threads)
4957 joinable_threads = g_hash_table_new (NULL, NULL);
4958 if (g_hash_table_lookup (joinable_threads, tid)) {
4959 g_hash_table_remove (joinable_threads, tid);
4960 joinable_thread_count --;
4963 joinable_threads_unlock ();
4966 thread = (pthread_t)tid;
4967 pthread_join (thread, NULL);
4972 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4974 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4975 mono_thread_interruption_checkpoint ();
4978 static inline gboolean
4979 is_appdomainunloaded_exception (MonoClass *klass)
4981 return klass == mono_class_get_appdomain_unloaded_exception_class ();
4984 static inline gboolean
4985 is_threadabort_exception (MonoClass *klass)
4987 return klass == mono_defaults.threadabortexception_class;
4991 mono_thread_internal_unhandled_exception (MonoObject* exc)
4993 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4994 MonoClass *klass = exc->vtable->klass;
4995 if (is_threadabort_exception (klass)) {
4996 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4997 } else if (!is_appdomainunloaded_exception (klass)) {
4998 mono_unhandled_exception (exc);
4999 if (mono_environment_exitcode_get () == 1)
5006 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5008 mono_threads_get_thread_dump (out_threads, out_stack_traces);