2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
19 #include <mono/metadata/object.h>
20 #include <mono/metadata/domain-internals.h>
21 #include <mono/metadata/profiler-private.h>
22 #include <mono/metadata/threads.h>
23 #include <mono/metadata/threads-types.h>
24 #include <mono/metadata/exception.h>
25 #include <mono/metadata/environment.h>
26 #include <mono/metadata/monitor.h>
27 #include <mono/metadata/gc-internals.h>
28 #include <mono/metadata/marshal.h>
29 #include <mono/metadata/runtime.h>
30 #include <mono/io-layer/io-layer.h>
31 #include <mono/metadata/object-internals.h>
32 #include <mono/metadata/mono-debug-debugger.h>
33 #include <mono/utils/monobitset.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/hazard-pointer.h>
40 #include <mono/utils/mono-tls.h>
41 #include <mono/utils/atomic.h>
42 #include <mono/utils/mono-memory-model.h>
44 #include <mono/metadata/gc-internals.h>
50 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
51 #define USE_TKILL_ON_ANDROID 1
54 #ifdef PLATFORM_ANDROID
57 #ifdef USE_TKILL_ON_ANDROID
58 extern int tkill (pid_t tid, int signal);
62 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
63 #define THREAD_DEBUG(a)
64 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
65 #define THREAD_WAIT_DEBUG(a)
66 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
67 #define LIBGC_DEBUG(a)
69 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
70 #define SPIN_LOCK(i) do { \
71 if (SPIN_TRYLOCK (i)) \
75 #define SPIN_UNLOCK(i) i = 0
77 #define LOCK_THREAD(thread) lock_thread((thread))
78 #define UNLOCK_THREAD(thread) unlock_thread((thread))
80 /* Provide this for systems with glib < 2.6 */
81 #ifndef G_GSIZE_FORMAT
82 # if GLIB_SIZEOF_LONG == 8
83 # define G_GSIZE_FORMAT "lu"
85 # define G_GSIZE_FORMAT "u"
91 guint32 (*func)(void *);
107 typedef struct _StaticDataFreeList StaticDataFreeList;
108 struct _StaticDataFreeList {
109 StaticDataFreeList *next;
117 StaticDataFreeList *freelist;
120 /* Number of cached culture objects in the MonoThread->cached_culture_info array
121 * (per-type): we use the first NUM entries for CultureInfo and the last for
122 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
124 #define NUM_CACHED_CULTURES 4
125 #define CULTURES_START_IDX 0
126 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
128 /* Controls access to the 'threads' hash table */
129 static void mono_threads_lock (void);
130 static void mono_threads_unlock (void);
131 static MonoCoopMutex threads_mutex;
133 /* Controls access to the 'joinable_threads' hash table */
134 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
135 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
136 static mono_mutex_t joinable_threads_mutex;
138 /* Holds current status of static data heap */
139 static StaticDataInfo thread_static_info;
140 static StaticDataInfo context_static_info;
142 /* The hash of existing threads (key is thread ID, value is
143 * MonoInternalThread*) that need joining before exit
145 static MonoGHashTable *threads=NULL;
147 /* List of app context GC handles.
148 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
150 static GHashTable *contexts = NULL;
153 * Threads which are starting up and they are not in the 'threads' hash yet.
154 * When handle_store is called for a thread, it will be removed from this hash table.
155 * Protected by mono_threads_lock ().
157 static MonoGHashTable *threads_starting_up = NULL;
159 /* The TLS key that holds the MonoObject assigned to each thread */
160 static MonoNativeTlsKey current_object_key;
163 /* Protected by the threads lock */
164 static GHashTable *joinable_threads;
165 static int joinable_thread_count;
167 #ifdef MONO_HAVE_FAST_TLS
168 /* we need to use both the Tls* functions and __thread because
169 * the gc needs to see all the threads
171 MONO_FAST_TLS_DECLARE(tls_current_object);
172 #define SET_CURRENT_OBJECT(x) do { \
173 MONO_FAST_TLS_SET (tls_current_object, x); \
174 mono_native_tls_set_value (current_object_key, x); \
176 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
178 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
179 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
182 /* function called at thread start */
183 static MonoThreadStartCB mono_thread_start_cb = NULL;
185 /* function called at thread attach */
186 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
188 /* function called at thread cleanup */
189 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
191 /* function called to notify the runtime about a pending exception on the current thread */
192 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
194 /* The default stack size for each thread */
195 static guint32 default_stacksize = 0;
196 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
198 static void thread_adjust_static_data (MonoInternalThread *thread);
199 static void context_adjust_static_data (MonoAppContext *ctx);
200 static void mono_free_static_data (gpointer* static_data);
201 static void mono_init_static_data_info (StaticDataInfo *static_data);
202 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
203 static gboolean mono_thread_resume (MonoInternalThread* thread);
204 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
205 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
206 static void self_suspend_internal (MonoInternalThread *thread);
208 static MonoException* mono_thread_execute_interruption ();
209 static void ref_stack_destroy (gpointer rs);
211 /* Spin lock for InterlockedXXX 64 bit functions */
212 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
213 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
214 static mono_mutex_t interlocked_mutex;
216 /* global count of thread interruptions requested */
217 static gint32 thread_interruption_requested = 0;
219 /* Event signaled when a thread changes its background mode */
220 static HANDLE background_change_event;
222 static gboolean shutting_down = FALSE;
224 static gint32 managed_thread_id_counter = 0;
227 mono_threads_lock (void)
229 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
233 mono_threads_unlock (void)
235 mono_locks_coop_release (&threads_mutex, ThreadsLock);
240 get_next_managed_thread_id (void)
242 return InterlockedIncrement (&managed_thread_id_counter);
246 mono_thread_get_tls_key (void)
248 return current_object_key;
252 mono_thread_get_tls_offset (void)
255 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
259 static inline MonoNativeThreadId
260 thread_get_tid (MonoInternalThread *thread)
262 /* We store the tid as a guint64 to keep the object layout constant between platforms */
263 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
266 /* handle_store() and handle_remove() manage the array of threads that
267 * still need to be waited for when the main thread exits.
269 * If handle_store() returns FALSE the thread must not be started
270 * because Mono is shutting down.
272 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
274 mono_threads_lock ();
276 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
278 if (threads_starting_up)
279 mono_g_hash_table_remove (threads_starting_up, thread);
281 if (shutting_down && !force_attach) {
282 mono_threads_unlock ();
287 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
288 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
291 /* We don't need to duplicate thread->handle, because it is
292 * only closed when the thread object is finalized by the GC.
294 g_assert (thread->internal_thread);
295 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
296 thread->internal_thread);
298 mono_threads_unlock ();
303 static gboolean handle_remove(MonoInternalThread *thread)
306 gsize tid = thread->tid;
308 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
310 mono_threads_lock ();
313 /* We have to check whether the thread object for the
314 * tid is still the same in the table because the
315 * thread might have been destroyed and the tid reused
316 * in the meantime, in which case the tid would be in
317 * the table, but with another thread object.
319 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
320 mono_g_hash_table_remove (threads, (gpointer)tid);
329 mono_threads_unlock ();
331 /* Don't close the handle here, wait for the object finalizer
332 * to do it. Otherwise, the following race condition applies:
334 * 1) Thread exits (and handle_remove() closes the handle)
336 * 2) Some other handle is reassigned the same slot
338 * 3) Another thread tries to join the first thread, and
339 * blocks waiting for the reassigned handle to be signalled
340 * (which might never happen). This is possible, because the
341 * thread calling Join() still has a reference to the first
347 static void ensure_synch_cs_set (MonoInternalThread *thread)
349 MonoCoopMutex *synch_cs;
351 if (thread->synch_cs != NULL) {
355 synch_cs = g_new0 (MonoCoopMutex, 1);
356 mono_coop_mutex_init_recursive (synch_cs);
358 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
359 synch_cs, NULL) != NULL) {
360 /* Another thread must have installed this CS */
361 mono_coop_mutex_destroy (synch_cs);
367 lock_thread (MonoInternalThread *thread)
369 if (!thread->synch_cs)
370 ensure_synch_cs_set (thread);
372 g_assert (thread->synch_cs);
374 mono_coop_mutex_lock (thread->synch_cs);
378 unlock_thread (MonoInternalThread *thread)
380 mono_coop_mutex_unlock (thread->synch_cs);
384 * NOTE: this function can be called also for threads different from the current one:
385 * make sure no code called from it will ever assume it is run on the thread that is
386 * getting cleaned up.
388 static void thread_cleanup (MonoInternalThread *thread)
390 g_assert (thread != NULL);
392 if (thread->abort_state_handle) {
393 mono_gchandle_free (thread->abort_state_handle);
394 thread->abort_state_handle = 0;
396 thread->abort_exc = NULL;
397 thread->current_appcontext = NULL;
400 * This is necessary because otherwise we might have
401 * cross-domain references which will not get cleaned up when
402 * the target domain is unloaded.
404 if (thread->cached_culture_info) {
406 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
407 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
411 * thread->synch_cs can be NULL if this was called after
412 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
413 * This can happen only during shutdown.
414 * The shutting_down flag is not always set, so we can't assert on it.
416 if (thread->synch_cs)
417 LOCK_THREAD (thread);
419 thread->state |= ThreadState_Stopped;
420 thread->state &= ~ThreadState_Background;
422 if (thread->synch_cs)
423 UNLOCK_THREAD (thread);
426 An interruption request has leaked to cleanup. Adjust the global counter.
428 This can happen is the abort source thread finds the abortee (this) thread
429 in unmanaged code. If this thread never trips back to managed code or check
430 the local flag it will be left set and positively unbalance the global counter.
432 Leaving the counter unbalanced will cause a performance degradation since all threads
433 will now keep checking their local flags all the time.
435 if (InterlockedExchange (&thread->interruption_requested, 0))
436 InterlockedDecrement (&thread_interruption_requested);
438 /* if the thread is not in the hash it has been removed already */
439 if (!handle_remove (thread)) {
440 if (thread == mono_thread_internal_current ()) {
441 mono_domain_unset ();
442 mono_memory_barrier ();
444 /* This needs to be called even if handle_remove () fails */
445 if (mono_thread_cleanup_fn)
446 mono_thread_cleanup_fn (thread_get_tid (thread));
449 mono_release_type_locks (thread);
451 mono_profiler_thread_end (thread->tid);
453 if (thread == mono_thread_internal_current ()) {
455 * This will signal async signal handlers that the thread has exited.
456 * The profiler callback needs this to be set, so it cannot be done earlier.
458 mono_domain_unset ();
459 mono_memory_barrier ();
462 if (thread == mono_thread_internal_current ())
463 mono_thread_pop_appdomain_ref ();
465 thread->cached_culture_info = NULL;
467 mono_free_static_data (thread->static_data);
468 thread->static_data = NULL;
469 ref_stack_destroy (thread->appdomain_refs);
470 thread->appdomain_refs = NULL;
472 if (mono_thread_cleanup_fn)
473 mono_thread_cleanup_fn (thread_get_tid (thread));
475 if (mono_gc_is_moving ()) {
476 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
477 thread->thread_pinning_ref = NULL;
483 * A special static data offset (guint32) consists of 3 parts:
485 * [0] 6-bit index into the array of chunks.
486 * [6] 25-bit offset into the array.
487 * [31] Bit indicating thread or context static.
492 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
503 } SpecialStaticOffset;
505 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
506 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
508 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
509 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
510 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
511 (((SpecialStaticOffset *) &(x))->fields.f)
514 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
516 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
518 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
519 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
521 return ((char *) thread->static_data [idx]) + off;
525 get_context_static_data (MonoAppContext *ctx, guint32 offset)
527 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
529 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
530 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
532 return ((char *) ctx->static_data [idx]) + off;
536 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
538 static MonoClassField *current_thread_field = NULL;
542 if (!current_thread_field) {
543 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
544 g_assert (current_thread_field);
547 mono_class_vtable (domain, mono_defaults.thread_class);
548 mono_domain_lock (domain);
549 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
550 mono_domain_unlock (domain);
553 return (MonoThread **)get_thread_static_data (thread, offset);
557 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
559 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
561 g_assert (current->obj.vtable->domain == domain);
563 g_assert (!*current_thread_ptr);
564 *current_thread_ptr = current;
568 create_thread_object (MonoDomain *domain)
570 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
571 return (MonoThread*)mono_gc_alloc_mature (vt);
575 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
577 MonoThread *thread = create_thread_object (domain);
578 MONO_OBJECT_SETREF (thread, internal_thread, internal);
582 static MonoInternalThread*
583 create_internal_thread (void)
585 MonoInternalThread *thread;
588 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
589 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
591 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
592 mono_coop_mutex_init_recursive (thread->synch_cs);
594 thread->apartment_state = ThreadApartmentState_Unknown;
595 thread->managed_id = get_next_managed_thread_id ();
596 if (mono_gc_is_moving ()) {
597 thread->thread_pinning_ref = thread;
598 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
605 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
607 MonoDomain *domain = mono_get_root_domain ();
609 if (!candidate || candidate->obj.vtable->domain != domain)
610 candidate = new_thread_with_internal (domain, thread);
611 set_current_thread_for_domain (domain, thread, candidate);
612 g_assert (!thread->root_domain_thread);
613 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
616 static guint32 WINAPI start_wrapper_internal(void *data)
618 MonoThreadInfo *info;
619 StartInfo *start_info = (StartInfo *)data;
620 guint32 (*start_func)(void *);
624 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
627 MonoInternalThread *internal = start_info->obj->internal_thread;
628 MonoObject *start_delegate = start_info->delegate;
629 MonoDomain *domain = start_info->obj->obj.vtable->domain;
631 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
633 /* We can be sure start_info->obj->tid and
634 * start_info->obj->handle have been set, because the thread
635 * was created suspended, and these values were set before the
639 info = mono_thread_info_current ();
641 internal->thread_info = info;
642 internal->small_id = info->small_id;
646 SET_CURRENT_OBJECT (internal);
648 /* Every thread references the appdomain which created it */
649 mono_thread_push_appdomain_ref (domain);
651 if (!mono_domain_set (domain, FALSE)) {
652 /* No point in raising an appdomain_unloaded exception here */
653 /* FIXME: Cleanup here */
654 mono_thread_pop_appdomain_ref ();
658 start_func = start_info->func;
659 start_arg = start_info->obj->start_obj;
661 start_arg = start_info->start_arg;
663 /* We have to do this here because mono_thread_new_init()
664 requires that root_domain_thread is set up. */
665 thread_adjust_static_data (internal);
666 init_root_domain_thread (internal, start_info->obj);
668 /* This MUST be called before any managed code can be
669 * executed, as it calls the callback function that (for the
670 * jit) sets the lmf marker.
672 mono_thread_new_init (tid, &tid, start_func);
673 internal->stack_ptr = &tid;
674 if (domain != mono_get_root_domain ())
675 set_current_thread_for_domain (domain, internal, start_info->obj);
677 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
679 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
681 /* On 2.0 profile (and higher), set explicitly since state might have been
683 if (internal->apartment_state == ThreadApartmentState_Unknown)
684 internal->apartment_state = ThreadApartmentState_MTA;
686 mono_thread_init_apartment_state ();
688 if(internal->start_notify!=NULL) {
689 /* Let the thread that called Start() know we're
692 ReleaseSemaphore (internal->start_notify, 1, NULL);
696 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
700 * Call this after calling start_notify, since the profiler callback might want
701 * to lock the thread, and the lock is held by thread_start () which waits for
704 mono_profiler_thread_start (tid);
706 /* if the name was set before starting, we didn't invoke the profiler callback */
707 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
708 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
709 mono_profiler_thread_name (internal->tid, tname);
712 /* start_func is set only for unmanaged start functions */
714 start_func (start_arg);
717 g_assert (start_delegate != NULL);
718 args [0] = start_arg;
719 /* we may want to handle the exception here. See comment below on unhandled exceptions */
720 mono_runtime_delegate_invoke (start_delegate, args, NULL);
723 /* If the thread calls ExitThread at all, this remaining code
724 * will not be executed, but the main thread will eventually
725 * call thread_cleanup() on this thread's behalf.
728 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
730 /* Do any cleanup needed for apartment state. This
731 * cannot be done in thread_cleanup since thread_cleanup could be
732 * called for a thread other than the current thread.
733 * mono_thread_cleanup_apartment_state cleans up apartment
734 * for the current thead */
735 mono_thread_cleanup_apartment_state ();
737 thread_cleanup (internal);
741 /* Remove the reference to the thread object in the TLS data,
742 * so the thread object can be finalized. This won't be
743 * reached if the thread threw an uncaught exception, so those
744 * thread handles will stay referenced :-( (This is due to
745 * missing support for scanning thread-specific data in the
746 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
749 SET_CURRENT_OBJECT (NULL);
754 static guint32 WINAPI start_wrapper(void *data)
758 /* Avoid scanning the frames above this frame during a GC */
759 mono_gc_set_stack_end ((void*)&dummy);
761 return start_wrapper_internal (data);
767 * Common thread creation code.
768 * LOCKING: Acquires the threads lock.
771 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
772 gboolean throw_on_failure)
774 HANDLE thread_handle;
775 MonoNativeThreadId tid;
776 guint32 create_flags;
779 * Join joinable threads to prevent running out of threads since the finalizer
780 * thread might be blocked/backlogged.
782 mono_threads_join_threads ();
784 mono_threads_lock ();
787 mono_threads_unlock ();
790 if (threads_starting_up == NULL) {
791 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
792 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
794 mono_g_hash_table_insert (threads_starting_up, thread, thread);
795 mono_threads_unlock ();
797 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
798 if (!internal->start_notify) {
799 mono_threads_lock ();
800 mono_g_hash_table_remove (threads_starting_up, thread);
801 mono_threads_unlock ();
802 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
808 stack_size = default_stacksize_for_thread (internal);
810 /* Create suspended, so we can do some housekeeping before the thread
813 create_flags = CREATE_SUSPENDED;
815 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
816 stack_size, create_flags, &tid);
818 if (thread_handle == NULL) {
819 /* The thread couldn't be created, so throw an exception */
820 mono_threads_lock ();
821 mono_g_hash_table_remove (threads_starting_up, thread);
822 mono_threads_unlock ();
824 if (throw_on_failure)
825 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
827 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
830 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
832 internal->handle = thread_handle;
833 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
835 internal->threadpool_thread = threadpool_thread;
836 if (threadpool_thread)
837 mono_thread_set_state (internal, ThreadState_Background);
839 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
841 /* Only store the handle when the thread is about to be
842 * launched, to avoid the main thread deadlocking while trying
843 * to clean up a thread that will never be signalled.
845 if (!handle_store (thread, FALSE))
848 mono_thread_info_resume (tid);
850 if (internal->start_notify) {
852 * Wait for the thread to set up its TLS data etc, so
853 * theres no potential race condition if someone tries
854 * to look up the data believing the thread has
857 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));
859 MONO_PREPARE_BLOCKING;
860 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
861 MONO_FINISH_BLOCKING;
863 CloseHandle (internal->start_notify);
864 internal->start_notify = NULL;
867 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));
872 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
874 if (mono_thread_start_cb) {
875 mono_thread_start_cb (tid, stack_start, func);
879 void mono_threads_set_default_stacksize (guint32 stacksize)
881 default_stacksize = stacksize;
884 guint32 mono_threads_get_default_stacksize (void)
886 return default_stacksize;
890 * mono_thread_create_internal:
892 * ARG should not be a GC reference.
895 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
898 MonoInternalThread *internal;
899 StartInfo *start_info;
902 thread = create_thread_object (domain);
903 internal = create_internal_thread ();
904 MONO_OBJECT_SETREF (thread, internal_thread, internal);
906 start_info = g_new0 (StartInfo, 1);
907 start_info->func = (guint32 (*)(void *))func;
908 start_info->obj = thread;
909 start_info->start_arg = arg;
911 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
915 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
916 #ifndef MONO_CROSS_COMPILE
917 if (mono_check_corlib_version () == NULL)
918 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
925 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
927 mono_thread_create_internal (domain, func, arg, FALSE, 0);
931 mono_thread_attach (MonoDomain *domain)
933 return mono_thread_attach_full (domain, FALSE);
937 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
939 MonoThreadInfo *info;
940 MonoInternalThread *thread;
941 MonoThread *current_thread;
942 HANDLE thread_handle;
943 MonoNativeThreadId tid;
945 if ((thread = mono_thread_internal_current ())) {
946 if (domain != mono_domain_get ())
947 mono_domain_set (domain, TRUE);
948 /* Already attached */
949 return mono_thread_current ();
952 if (!mono_gc_register_thread (&domain)) {
953 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 ());
956 thread = create_internal_thread ();
958 thread_handle = mono_thread_info_open_handle ();
959 g_assert (thread_handle);
961 tid=mono_native_thread_id_get ();
963 thread->handle = thread_handle;
964 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
965 thread->stack_ptr = &tid;
967 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
969 info = mono_thread_info_current ();
971 thread->thread_info = info;
972 thread->small_id = info->small_id;
974 current_thread = new_thread_with_internal (domain, thread);
976 if (!handle_store (current_thread, force_attach)) {
977 /* Mono is shutting down, so just wait for the end */
979 mono_thread_info_sleep (10000, NULL);
982 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
984 SET_CURRENT_OBJECT (thread);
985 mono_domain_set (domain, TRUE);
987 thread_adjust_static_data (thread);
989 init_root_domain_thread (thread, current_thread);
990 if (domain != mono_get_root_domain ())
991 set_current_thread_for_domain (domain, thread, current_thread);
994 if (mono_thread_attach_cb) {
998 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1001 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1003 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1006 // FIXME: Need a separate callback
1007 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1009 return current_thread;
1013 mono_thread_detach_internal (MonoInternalThread *thread)
1015 g_return_if_fail (thread != NULL);
1017 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1019 thread_cleanup (thread);
1021 SET_CURRENT_OBJECT (NULL);
1022 mono_domain_unset ();
1024 /* Don't need to CloseHandle this thread, even though we took a
1025 * reference in mono_thread_attach (), because the GC will do it
1026 * when the Thread object is finalised.
1031 mono_thread_detach (MonoThread *thread)
1034 mono_thread_detach_internal (thread->internal_thread);
1038 * mono_thread_detach_if_exiting:
1040 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1041 * This should be used at the end of embedding code which calls into managed code, and which
1042 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1045 mono_thread_detach_if_exiting (void)
1047 if (mono_thread_info_is_exiting ()) {
1048 MonoInternalThread *thread;
1050 thread = mono_thread_internal_current ();
1052 mono_thread_detach_internal (thread);
1053 mono_thread_info_detach ();
1061 MonoInternalThread *thread = mono_thread_internal_current ();
1063 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1065 thread_cleanup (thread);
1066 SET_CURRENT_OBJECT (NULL);
1067 mono_domain_unset ();
1069 /* we could add a callback here for embedders to use. */
1070 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1071 exit (mono_environment_exitcode_get ());
1072 mono_thread_info_exit ();
1076 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1078 MonoInternalThread *internal = create_internal_thread ();
1080 internal->state = ThreadState_Unstarted;
1082 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1086 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1089 StartInfo *start_info;
1090 MonoInternalThread *internal;
1093 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1095 if (!this_obj->internal_thread)
1096 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1097 internal = this_obj->internal_thread;
1099 LOCK_THREAD (internal);
1101 if ((internal->state & ThreadState_Unstarted) == 0) {
1102 UNLOCK_THREAD (internal);
1103 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1107 if ((internal->state & ThreadState_Aborted) != 0) {
1108 UNLOCK_THREAD (internal);
1111 /* This is freed in start_wrapper */
1112 start_info = g_new0 (StartInfo, 1);
1113 start_info->func = NULL;
1114 start_info->start_arg = NULL;
1115 start_info->delegate = start;
1116 start_info->obj = this_obj;
1117 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1119 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1121 UNLOCK_THREAD (internal);
1125 internal->state &= ~ThreadState_Unstarted;
1127 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1129 UNLOCK_THREAD (internal);
1130 return internal->handle;
1134 * This is called from the finalizer of the internal thread object.
1137 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1139 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1142 * Since threads keep a reference to their thread object while running, by the time this function is called,
1143 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1144 * when thread_cleanup () can be called after this.
1147 CloseHandle (thread);
1149 if (this_obj->synch_cs) {
1150 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1151 this_obj->synch_cs = NULL;
1152 mono_coop_mutex_destroy (synch_cs);
1156 if (this_obj->name) {
1157 void *name = this_obj->name;
1158 this_obj->name = NULL;
1164 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1167 MonoInternalThread *thread = mono_thread_internal_current ();
1169 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1171 mono_thread_current_check_pending_interrupt ();
1174 gboolean alerted = FALSE;
1176 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1178 res = mono_thread_info_sleep (ms, &alerted);
1180 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1183 MonoException* exc = mono_thread_execute_interruption ();
1185 mono_raise_exception (exc);
1197 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1202 ves_icall_System_Threading_Thread_GetDomainID (void)
1204 return mono_domain_get()->domain_id;
1208 ves_icall_System_Threading_Thread_Yield (void)
1210 return mono_thread_info_yield ();
1214 * mono_thread_get_name:
1216 * Return the name of the thread. NAME_LEN is set to the length of the name.
1217 * Return NULL if the thread has no name. The returned memory is owned by the
1221 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1225 LOCK_THREAD (this_obj);
1227 if (!this_obj->name) {
1231 *name_len = this_obj->name_len;
1232 res = g_new (gunichar2, this_obj->name_len);
1233 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1236 UNLOCK_THREAD (this_obj);
1242 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1246 LOCK_THREAD (this_obj);
1248 if (!this_obj->name)
1251 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1253 UNLOCK_THREAD (this_obj);
1259 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1261 LOCK_THREAD (this_obj);
1263 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1264 UNLOCK_THREAD (this_obj);
1266 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1269 if (this_obj->name) {
1270 g_free (this_obj->name);
1271 this_obj->name_len = 0;
1274 this_obj->name = g_new (gunichar2, mono_string_length (name));
1275 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1276 this_obj->name_len = mono_string_length (name);
1279 this_obj->name = NULL;
1282 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1284 UNLOCK_THREAD (this_obj);
1286 if (this_obj->name && this_obj->tid) {
1287 char *tname = mono_string_to_utf8 (name);
1288 mono_profiler_thread_name (this_obj->tid, tname);
1289 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1295 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1297 mono_thread_set_name_internal (this_obj, name, TRUE);
1301 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1303 return ThreadPriority_Lowest;
1307 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1311 /* If the array is already in the requested domain, we just return it,
1312 otherwise we return a copy in that domain. */
1314 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1321 if (mono_object_domain (arr) == domain)
1324 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1325 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1330 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1332 return byte_array_to_domain (arr, mono_get_root_domain ());
1336 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1338 return byte_array_to_domain (arr, mono_domain_get ());
1342 mono_thread_current (void)
1344 MonoDomain *domain = mono_domain_get ();
1345 MonoInternalThread *internal = mono_thread_internal_current ();
1346 MonoThread **current_thread_ptr;
1348 g_assert (internal);
1349 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1351 if (!*current_thread_ptr) {
1352 g_assert (domain != mono_get_root_domain ());
1353 *current_thread_ptr = new_thread_with_internal (domain, internal);
1355 return *current_thread_ptr;
1358 /* Return the thread object belonging to INTERNAL in the current domain */
1360 mono_thread_current_for_thread (MonoInternalThread *internal)
1362 MonoDomain *domain = mono_domain_get ();
1363 MonoThread **current_thread_ptr;
1365 g_assert (internal);
1366 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1368 if (!*current_thread_ptr) {
1369 g_assert (domain != mono_get_root_domain ());
1370 *current_thread_ptr = new_thread_with_internal (domain, internal);
1372 return *current_thread_ptr;
1376 mono_thread_internal_current (void)
1378 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1379 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1384 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1386 MonoInternalThread *thread = this_obj->internal_thread;
1387 HANDLE handle = thread->handle;
1388 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1391 mono_thread_current_check_pending_interrupt ();
1393 LOCK_THREAD (thread);
1395 if ((thread->state & ThreadState_Unstarted) != 0) {
1396 UNLOCK_THREAD (thread);
1398 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1402 UNLOCK_THREAD (thread);
1407 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1409 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1411 MONO_PREPARE_BLOCKING;
1412 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1413 MONO_FINISH_BLOCKING;
1415 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1417 if(ret==WAIT_OBJECT_0) {
1418 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1423 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1429 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1437 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1439 MONO_PREPARE_BLOCKING;
1441 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1443 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1444 MONO_FINISH_BLOCKING;
1446 if (ret != WAIT_IO_COMPLETION)
1449 exc = mono_thread_execute_interruption ();
1451 mono_raise_exception (exc);
1456 /* Re-calculate ms according to the time passed */
1457 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1458 if (diff_ms >= ms) {
1462 wait = ms - diff_ms;
1468 /* FIXME: exitContext isnt documented */
1469 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1475 MonoObject *waitHandle;
1476 MonoInternalThread *thread = mono_thread_internal_current ();
1478 /* Do this WaitSleepJoin check before creating objects */
1479 mono_thread_current_check_pending_interrupt ();
1481 /* We fail in managed if the array has more than 64 elements */
1482 numhandles = (guint32)mono_array_length(mono_handles);
1483 handles = g_new0(HANDLE, numhandles);
1485 for(i = 0; i < numhandles; i++) {
1486 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1487 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1494 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1496 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1498 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1502 if(ret==WAIT_FAILED) {
1503 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1505 } else if(ret==WAIT_TIMEOUT) {
1506 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1513 /* FIXME: exitContext isnt documented */
1514 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1516 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1517 uintptr_t numhandles;
1520 MonoObject *waitHandle;
1521 MonoInternalThread *thread = mono_thread_internal_current ();
1523 /* Do this WaitSleepJoin check before creating objects */
1524 mono_thread_current_check_pending_interrupt ();
1526 numhandles = mono_array_length(mono_handles);
1527 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1530 for(i = 0; i < numhandles; i++) {
1531 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1532 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1539 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1541 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1543 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1545 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1548 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1550 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1551 return ret - WAIT_OBJECT_0;
1553 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1554 return ret - WAIT_ABANDONED_0;
1561 /* FIXME: exitContext isnt documented */
1562 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1565 MonoInternalThread *thread = mono_thread_internal_current ();
1567 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1573 mono_thread_current_check_pending_interrupt ();
1575 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1577 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1579 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1581 if(ret==WAIT_FAILED) {
1582 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1584 } else if(ret==WAIT_TIMEOUT) {
1585 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1593 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1596 MonoInternalThread *thread = mono_thread_internal_current ();
1601 mono_thread_current_check_pending_interrupt ();
1603 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1605 MONO_PREPARE_BLOCKING;
1606 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1607 MONO_FINISH_BLOCKING;
1609 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1611 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1614 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1621 mutex = CreateMutex (NULL, owned, NULL);
1623 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1625 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1633 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1634 return(ReleaseMutex (handle));
1637 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1643 *error = ERROR_SUCCESS;
1645 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1647 *error = GetLastError ();
1654 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1661 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1663 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1664 mono_string_chars (name));
1666 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1674 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1678 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1683 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1687 *error = ERROR_SUCCESS;
1689 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1691 *error = GetLastError ();
1697 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1704 event = CreateEvent (NULL, manual, initial, NULL);
1706 event = CreateEvent (NULL, manual, initial,
1707 mono_string_chars (name));
1709 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1717 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1718 return (SetEvent(handle));
1721 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1722 return (ResetEvent(handle));
1726 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1727 CloseHandle (handle);
1730 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1736 *error = ERROR_SUCCESS;
1738 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1740 *error = GetLastError ();
1746 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1748 return InterlockedIncrement (location);
1751 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1753 #if SIZEOF_VOID_P == 4
1754 if (G_UNLIKELY ((size_t)location & 0x7)) {
1756 mono_interlocked_lock ();
1759 mono_interlocked_unlock ();
1763 return InterlockedIncrement64 (location);
1766 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1768 return InterlockedDecrement(location);
1771 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1773 #if SIZEOF_VOID_P == 4
1774 if (G_UNLIKELY ((size_t)location & 0x7)) {
1776 mono_interlocked_lock ();
1779 mono_interlocked_unlock ();
1783 return InterlockedDecrement64 (location);
1786 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1788 return InterlockedExchange(location, value);
1791 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1794 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1795 mono_gc_wbarrier_generic_nostore (location);
1799 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1801 return InterlockedExchangePointer(location, value);
1804 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1806 IntFloatUnion val, ret;
1809 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1815 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1817 #if SIZEOF_VOID_P == 4
1818 if (G_UNLIKELY ((size_t)location & 0x7)) {
1820 mono_interlocked_lock ();
1823 mono_interlocked_unlock ();
1827 return InterlockedExchange64 (location, value);
1831 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1833 LongDoubleUnion val, ret;
1836 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1841 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1843 return InterlockedCompareExchange(location, value, comparand);
1846 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1848 gint32 r = InterlockedCompareExchange(location, value, comparand);
1849 *success = r == comparand;
1853 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1856 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1857 mono_gc_wbarrier_generic_nostore (location);
1861 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1863 return InterlockedCompareExchangePointer(location, value, comparand);
1866 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1868 IntFloatUnion val, ret, cmp;
1871 cmp.fval = comparand;
1872 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1878 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1880 #if SIZEOF_VOID_P == 8
1881 LongDoubleUnion val, comp, ret;
1884 comp.fval = comparand;
1885 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1891 mono_interlocked_lock ();
1893 if (old == comparand)
1895 mono_interlocked_unlock ();
1902 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1904 #if SIZEOF_VOID_P == 4
1905 if (G_UNLIKELY ((size_t)location & 0x7)) {
1907 mono_interlocked_lock ();
1909 if (old == comparand)
1911 mono_interlocked_unlock ();
1915 return InterlockedCompareExchange64 (location, value, comparand);
1919 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1922 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
1923 mono_gc_wbarrier_generic_nostore (location);
1928 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1931 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
1932 mono_gc_wbarrier_generic_nostore (location);
1937 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1939 return InterlockedAdd (location, value);
1943 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1945 #if SIZEOF_VOID_P == 4
1946 if (G_UNLIKELY ((size_t)location & 0x7)) {
1948 mono_interlocked_lock ();
1951 mono_interlocked_unlock ();
1955 return InterlockedAdd64 (location, value);
1959 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1961 #if SIZEOF_VOID_P == 4
1962 if (G_UNLIKELY ((size_t)location & 0x7)) {
1964 mono_interlocked_lock ();
1966 mono_interlocked_unlock ();
1970 return InterlockedRead64 (location);
1974 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1976 mono_memory_barrier ();
1980 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
1982 mono_thread_clr_state (this_obj, (MonoThreadState)state);
1984 if (state & ThreadState_Background) {
1985 /* If the thread changes the background mode, the main thread has to
1986 * be notified, since it has to rebuild the list of threads to
1989 SetEvent (background_change_event);
1994 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
1996 mono_thread_set_state (this_obj, (MonoThreadState)state);
1998 if (state & ThreadState_Background) {
1999 /* If the thread changes the background mode, the main thread has to
2000 * be notified, since it has to rebuild the list of threads to
2003 SetEvent (background_change_event);
2008 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2012 LOCK_THREAD (this_obj);
2014 state = this_obj->state;
2016 UNLOCK_THREAD (this_obj);
2021 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2023 MonoInternalThread *current;
2025 MonoInternalThread *thread = this_obj->internal_thread;
2027 LOCK_THREAD (thread);
2029 current = mono_thread_internal_current ();
2031 thread->thread_interrupt_requested = TRUE;
2032 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2034 UNLOCK_THREAD (thread);
2037 abort_thread_internal (thread, TRUE, FALSE);
2041 void mono_thread_current_check_pending_interrupt ()
2043 MonoInternalThread *thread = mono_thread_internal_current ();
2044 gboolean throw_ = FALSE;
2046 LOCK_THREAD (thread);
2048 if (thread->thread_interrupt_requested) {
2050 thread->thread_interrupt_requested = FALSE;
2053 UNLOCK_THREAD (thread);
2056 mono_raise_exception (mono_get_exception_thread_interrupted ());
2061 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2063 LOCK_THREAD (thread);
2065 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2066 (thread->state & ThreadState_StopRequested) != 0 ||
2067 (thread->state & ThreadState_Stopped) != 0)
2069 UNLOCK_THREAD (thread);
2073 if ((thread->state & ThreadState_Unstarted) != 0) {
2074 thread->state |= ThreadState_Aborted;
2075 UNLOCK_THREAD (thread);
2079 thread->state |= ThreadState_AbortRequested;
2080 if (thread->abort_state_handle)
2081 mono_gchandle_free (thread->abort_state_handle);
2083 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2084 g_assert (thread->abort_state_handle);
2086 thread->abort_state_handle = 0;
2088 thread->abort_exc = NULL;
2090 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));
2092 /* During shutdown, we can't wait for other threads */
2094 /* Make sure the thread is awake */
2095 mono_thread_resume (thread);
2097 UNLOCK_THREAD (thread);
2099 abort_thread_internal (thread, TRUE, TRUE);
2103 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2105 MonoInternalThread *thread = mono_thread_internal_current ();
2106 gboolean was_aborting;
2108 LOCK_THREAD (thread);
2109 was_aborting = thread->state & ThreadState_AbortRequested;
2110 thread->state &= ~ThreadState_AbortRequested;
2111 UNLOCK_THREAD (thread);
2113 if (!was_aborting) {
2114 const char *msg = "Unable to reset abort because no abort was requested";
2115 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2118 thread->abort_exc = NULL;
2119 if (thread->abort_state_handle) {
2120 mono_gchandle_free (thread->abort_state_handle);
2121 /* This is actually not necessary - the handle
2122 only counts if the exception is set */
2123 thread->abort_state_handle = 0;
2128 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2130 LOCK_THREAD (thread);
2132 thread->state &= ~ThreadState_AbortRequested;
2134 if (thread->abort_exc) {
2135 thread->abort_exc = NULL;
2136 if (thread->abort_state_handle) {
2137 mono_gchandle_free (thread->abort_state_handle);
2138 /* This is actually not necessary - the handle
2139 only counts if the exception is set */
2140 thread->abort_state_handle = 0;
2144 UNLOCK_THREAD (thread);
2148 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2150 MonoInternalThread *thread = this_obj->internal_thread;
2151 MonoObject *state, *deserialized = NULL, *exc;
2154 if (!thread->abort_state_handle)
2157 state = mono_gchandle_get_target (thread->abort_state_handle);
2160 domain = mono_domain_get ();
2161 if (mono_object_domain (state) == domain)
2164 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2166 if (!deserialized) {
2167 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2169 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2170 mono_set_pending_exception (invalid_op_exc);
2174 return deserialized;
2178 mono_thread_suspend (MonoInternalThread *thread)
2180 LOCK_THREAD (thread);
2182 if ((thread->state & ThreadState_Unstarted) != 0 ||
2183 (thread->state & ThreadState_Aborted) != 0 ||
2184 (thread->state & ThreadState_Stopped) != 0)
2186 UNLOCK_THREAD (thread);
2190 if ((thread->state & ThreadState_Suspended) != 0 ||
2191 (thread->state & ThreadState_SuspendRequested) != 0 ||
2192 (thread->state & ThreadState_StopRequested) != 0)
2194 UNLOCK_THREAD (thread);
2198 thread->state |= ThreadState_SuspendRequested;
2200 UNLOCK_THREAD (thread);
2202 suspend_thread_internal (thread, FALSE);
2207 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2209 if (!mono_thread_suspend (this_obj->internal_thread)) {
2210 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2215 /* LOCKING: LOCK_THREAD(thread) must be held */
2217 mono_thread_resume (MonoInternalThread *thread)
2219 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2220 thread->state &= ~ThreadState_SuspendRequested;
2224 if ((thread->state & ThreadState_Suspended) == 0 ||
2225 (thread->state & ThreadState_Unstarted) != 0 ||
2226 (thread->state & ThreadState_Aborted) != 0 ||
2227 (thread->state & ThreadState_Stopped) != 0)
2232 UNLOCK_THREAD (thread);
2234 /* Awake the thread */
2235 if (!mono_thread_info_resume (thread_get_tid (thread)))
2238 LOCK_THREAD (thread);
2240 thread->state &= ~ThreadState_Suspended;
2246 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2248 if (!thread->internal_thread) {
2249 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2251 LOCK_THREAD (thread->internal_thread);
2252 if (!mono_thread_resume (thread->internal_thread))
2253 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2254 UNLOCK_THREAD (thread->internal_thread);
2259 mono_threads_is_critical_method (MonoMethod *method)
2261 switch (method->wrapper_type) {
2262 case MONO_WRAPPER_RUNTIME_INVOKE:
2263 case MONO_WRAPPER_XDOMAIN_INVOKE:
2264 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2271 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2276 if (mono_threads_is_critical_method (m)) {
2277 *((gboolean*)data) = TRUE;
2284 is_running_protected_wrapper (void)
2286 gboolean found = FALSE;
2287 mono_stack_walk (find_wrapper, &found);
2291 void mono_thread_internal_stop (MonoInternalThread *thread)
2293 LOCK_THREAD (thread);
2295 if ((thread->state & ThreadState_StopRequested) != 0 ||
2296 (thread->state & ThreadState_Stopped) != 0)
2298 UNLOCK_THREAD (thread);
2302 /* Make sure the thread is awake */
2303 mono_thread_resume (thread);
2305 thread->state |= ThreadState_StopRequested;
2306 thread->state &= ~ThreadState_AbortRequested;
2308 UNLOCK_THREAD (thread);
2310 abort_thread_internal (thread, TRUE, TRUE);
2313 void mono_thread_stop (MonoThread *thread)
2315 mono_thread_internal_stop (thread->internal_thread);
2319 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2322 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2327 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2330 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2335 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2338 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2343 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2346 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2351 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2354 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2355 return (void *) tmp;
2359 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2361 volatile MonoObject *tmp;
2362 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2363 return (MonoObject *) tmp;
2367 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2370 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2375 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2378 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2383 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2385 return InterlockedRead8 ((volatile gint8 *)ptr);
2389 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2391 return InterlockedRead16 ((volatile gint16 *)ptr);
2395 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2397 return InterlockedRead ((volatile gint32 *)ptr);
2401 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2403 #if SIZEOF_VOID_P == 4
2404 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2406 mono_interlocked_lock ();
2407 val = *(gint64*)ptr;
2408 mono_interlocked_unlock ();
2412 return InterlockedRead64 ((volatile gint64 *)ptr);
2416 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2418 return InterlockedReadPointer ((volatile gpointer *)ptr);
2422 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2426 #if SIZEOF_VOID_P == 4
2427 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2429 mono_interlocked_lock ();
2430 val = *(double*)ptr;
2431 mono_interlocked_unlock ();
2436 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2442 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2446 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2452 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2454 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2458 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2460 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2464 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2466 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2470 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2472 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2476 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2478 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2482 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2484 mono_atomic_store_release ((volatile void **) ptr, value);
2488 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2490 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2494 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2496 mono_atomic_store_release ((volatile double *) ptr, value);
2500 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2502 mono_atomic_store_release ((volatile float *) ptr, value);
2506 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2508 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2512 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2514 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2518 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2520 InterlockedWrite ((volatile gint32 *)ptr, value);
2524 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2526 #if SIZEOF_VOID_P == 4
2527 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2528 mono_interlocked_lock ();
2529 *(gint64*)ptr = value;
2530 mono_interlocked_unlock ();
2535 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2539 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2541 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2545 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2549 #if SIZEOF_VOID_P == 4
2550 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2551 mono_interlocked_lock ();
2552 *(double*)ptr = value;
2553 mono_interlocked_unlock ();
2560 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2564 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2570 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2574 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2576 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2580 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2582 mono_threads_lock ();
2584 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2587 contexts = g_hash_table_new (NULL, NULL);
2589 context_adjust_static_data (ctx);
2590 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2591 g_hash_table_insert (contexts, gch, gch);
2593 mono_threads_unlock ();
2595 mono_profiler_context_loaded (ctx);
2599 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2602 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2603 * cleanup in exceptional circumstances, we don't actually do any
2604 * cleanup work here. We instead do this when we iterate the `contexts`
2605 * hash table. The only purpose of this finalizer, at the moment, is to
2606 * notify the profiler.
2609 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2611 mono_profiler_context_unloaded (ctx);
2615 mono_thread_init_tls (void)
2617 MONO_FAST_TLS_INIT (tls_current_object);
2618 mono_native_tls_alloc (¤t_object_key, NULL);
2621 void mono_thread_init (MonoThreadStartCB start_cb,
2622 MonoThreadAttachCB attach_cb)
2624 mono_coop_mutex_init_recursive (&threads_mutex);
2626 mono_os_mutex_init_recursive(&interlocked_mutex);
2627 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2629 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2630 g_assert(background_change_event != NULL);
2632 mono_init_static_data_info (&thread_static_info);
2633 mono_init_static_data_info (&context_static_info);
2635 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2637 mono_thread_start_cb = start_cb;
2638 mono_thread_attach_cb = attach_cb;
2640 /* Get a pseudo handle to the current process. This is just a
2641 * kludge so that wapi can build a process handle if needed.
2642 * As a pseudo handle is returned, we don't need to clean
2645 GetCurrentProcess ();
2648 void mono_thread_cleanup (void)
2650 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2651 MonoThreadInfo *info;
2653 /* The main thread must abandon any held mutexes (particularly
2654 * important for named mutexes as they are shared across
2655 * processes, see bug 74680.) This will happen when the
2656 * thread exits, but if it's not running in a subthread it
2657 * won't exit in time.
2659 info = mono_thread_info_current ();
2660 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2664 /* This stuff needs more testing, it seems one of these
2665 * critical sections can be locked when mono_thread_cleanup is
2668 mono_coop_mutex_destroy (&threads_mutex);
2669 mono_os_mutex_destroy (&interlocked_mutex);
2670 mono_os_mutex_destroy (&delayed_free_table_mutex);
2671 mono_os_mutex_destroy (&small_id_mutex);
2672 CloseHandle (background_change_event);
2675 mono_native_tls_free (current_object_key);
2679 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2681 mono_thread_cleanup_fn = func;
2685 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2687 thread->internal_thread->manage_callback = func;
2690 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2692 mono_thread_notify_pending_exc_fn = func;
2696 static void print_tids (gpointer key, gpointer value, gpointer user)
2698 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2699 * sizeof(uint) and a cast to uint would overflow
2701 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2702 * print this as a pointer.
2704 g_message ("Waiting for: %p", key);
2709 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2710 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2714 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2718 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2720 MONO_PREPARE_BLOCKING;
2721 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2722 MONO_FINISH_BLOCKING;
2724 if(ret==WAIT_FAILED) {
2725 /* See the comment in build_wait_tids() */
2726 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2730 for(i=0; i<wait->num; i++)
2731 CloseHandle (wait->handles[i]);
2733 if (ret == WAIT_TIMEOUT)
2736 for(i=0; i<wait->num; i++) {
2737 gsize tid = wait->threads[i]->tid;
2740 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2741 * it can still run io-layer etc. code. So wait for it to really exit.
2742 * FIXME: This won't join threads which are not in the joinable_hash yet.
2744 mono_thread_join ((gpointer)tid);
2746 mono_threads_lock ();
2747 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2748 /* This thread must have been killed, because
2749 * it hasn't cleaned itself up. (It's just
2750 * possible that the thread exited before the
2751 * parent thread had a chance to store the
2752 * handle, and now there is another pointer to
2753 * the already-exited thread stored. In this
2754 * case, we'll just get two
2755 * mono_profiler_thread_end() calls for the
2759 mono_threads_unlock ();
2760 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2761 thread_cleanup (wait->threads[i]);
2763 mono_threads_unlock ();
2768 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2770 guint32 i, ret, count;
2772 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2774 /* Add the thread state change event, so it wakes up if a thread changes
2775 * to background mode.
2778 if (count < MAXIMUM_WAIT_OBJECTS) {
2779 wait->handles [count] = background_change_event;
2783 MONO_PREPARE_BLOCKING;
2784 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2785 MONO_FINISH_BLOCKING;
2787 if(ret==WAIT_FAILED) {
2788 /* See the comment in build_wait_tids() */
2789 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2793 for(i=0; i<wait->num; i++)
2794 CloseHandle (wait->handles[i]);
2796 if (ret == WAIT_TIMEOUT)
2799 if (ret < wait->num) {
2800 gsize tid = wait->threads[ret]->tid;
2801 mono_threads_lock ();
2802 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2803 /* See comment in wait_for_tids about thread cleanup */
2804 mono_threads_unlock ();
2805 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2806 thread_cleanup (wait->threads [ret]);
2808 mono_threads_unlock ();
2812 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2814 struct wait_data *wait=(struct wait_data *)user;
2816 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2818 MonoInternalThread *thread=(MonoInternalThread *)value;
2820 /* Ignore background threads, we abort them later */
2821 /* Do not lock here since it is not needed and the caller holds threads_lock */
2822 if (thread->state & ThreadState_Background) {
2823 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2824 return; /* just leave, ignore */
2827 if (mono_gc_is_finalizer_internal_thread (thread)) {
2828 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2832 if (thread == mono_thread_internal_current ()) {
2833 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2837 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2838 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2842 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2843 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2847 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2848 if (handle == NULL) {
2849 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2853 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2854 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2855 wait->handles[wait->num]=handle;
2856 wait->threads[wait->num]=thread;
2859 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2861 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2866 /* Just ignore the rest, we can't do anything with
2873 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2875 struct wait_data *wait=(struct wait_data *)user;
2876 MonoNativeThreadId self = mono_native_thread_id_get ();
2877 MonoInternalThread *thread = (MonoInternalThread *)value;
2880 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2883 /* The finalizer thread is not a background thread */
2884 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
2885 && (thread->state & ThreadState_Background) != 0
2886 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
2888 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2892 /* printf ("A: %d\n", wait->num); */
2893 wait->handles[wait->num]=thread->handle;
2894 wait->threads[wait->num]=thread;
2897 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2898 mono_thread_internal_stop (thread);
2902 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
2903 && !mono_gc_is_finalizer_internal_thread (thread);
2907 * mono_threads_set_shutting_down:
2909 * Is called by a thread that wants to shut down Mono. If the runtime is already
2910 * shutting down, the calling thread is suspended/stopped, and this function never
2914 mono_threads_set_shutting_down (void)
2916 MonoInternalThread *current_thread = mono_thread_internal_current ();
2918 mono_threads_lock ();
2920 if (shutting_down) {
2921 mono_threads_unlock ();
2923 /* Make sure we're properly suspended/stopped */
2925 LOCK_THREAD (current_thread);
2927 if ((current_thread->state & ThreadState_SuspendRequested) ||
2928 (current_thread->state & ThreadState_AbortRequested) ||
2929 (current_thread->state & ThreadState_StopRequested)) {
2930 UNLOCK_THREAD (current_thread);
2931 mono_thread_execute_interruption ();
2933 current_thread->state |= ThreadState_Stopped;
2934 UNLOCK_THREAD (current_thread);
2937 /*since we're killing the thread, unset the current domain.*/
2938 mono_domain_unset ();
2940 /* Wake up other threads potentially waiting for us */
2941 mono_thread_info_exit ();
2943 shutting_down = TRUE;
2945 /* Not really a background state change, but this will
2946 * interrupt the main thread if it is waiting for all
2947 * the other threads.
2949 SetEvent (background_change_event);
2951 mono_threads_unlock ();
2955 void mono_thread_manage (void)
2957 struct wait_data wait_data;
2958 struct wait_data *wait = &wait_data;
2960 memset (wait, 0, sizeof (struct wait_data));
2961 /* join each thread that's still running */
2962 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2964 mono_threads_lock ();
2966 THREAD_DEBUG (g_message("%s: No threads", __func__));
2967 mono_threads_unlock ();
2970 mono_threads_unlock ();
2973 mono_threads_lock ();
2974 if (shutting_down) {
2975 /* somebody else is shutting down */
2976 mono_threads_unlock ();
2979 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2980 mono_g_hash_table_foreach (threads, print_tids, NULL));
2982 ResetEvent (background_change_event);
2984 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2985 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2986 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2987 mono_threads_unlock ();
2989 /* Something to wait for */
2990 wait_for_tids_or_state_change (wait, INFINITE);
2992 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2993 } while(wait->num>0);
2995 /* Mono is shutting down, so just wait for the end */
2996 if (!mono_runtime_try_shutdown ()) {
2997 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2998 mono_thread_suspend (mono_thread_internal_current ());
2999 mono_thread_execute_interruption ();
3003 * Remove everything but the finalizer thread and self.
3004 * Also abort all the background threads
3007 mono_threads_lock ();
3010 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3011 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3012 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3014 mono_threads_unlock ();
3016 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3018 /* Something to wait for */
3019 wait_for_tids (wait, INFINITE);
3021 } while (wait->num > 0);
3024 * give the subthreads a chance to really quit (this is mainly needed
3025 * to get correct user and system times from getrusage/wait/time(1)).
3026 * This could be removed if we avoid pthread_detach() and use pthread_join().
3028 mono_thread_info_yield ();
3032 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3034 MonoInternalThread *thread = (MonoInternalThread*)value;
3035 struct wait_data *wait = (struct wait_data*)user_data;
3039 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3041 * This needs no locking.
3043 if ((thread->state & ThreadState_Suspended) != 0 ||
3044 (thread->state & ThreadState_Stopped) != 0)
3047 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3048 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3052 wait->handles [wait->num] = handle;
3053 wait->threads [wait->num] = thread;
3059 * mono_thread_suspend_all_other_threads:
3061 * Suspend all managed threads except the finalizer thread and this thread. It is
3062 * not possible to resume them later.
3064 void mono_thread_suspend_all_other_threads (void)
3066 struct wait_data wait_data;
3067 struct wait_data *wait = &wait_data;
3069 MonoNativeThreadId self = mono_native_thread_id_get ();
3070 guint32 eventidx = 0;
3071 gboolean starting, finished;
3073 memset (wait, 0, sizeof (struct wait_data));
3075 * The other threads could be in an arbitrary state at this point, i.e.
3076 * they could be starting up, shutting down etc. This means that there could be
3077 * threads which are not even in the threads hash table yet.
3081 * First we set a barrier which will be checked by all threads before they
3082 * are added to the threads hash table, and they will exit if the flag is set.
3083 * This ensures that no threads could be added to the hash later.
3084 * We will use shutting_down as the barrier for now.
3086 g_assert (shutting_down);
3089 * We make multiple calls to WaitForMultipleObjects since:
3090 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3091 * - some threads could exit without becoming suspended
3096 * Make a copy of the hashtable since we can't do anything with
3097 * threads while threads_mutex is held.
3100 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3101 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3102 mono_threads_lock ();
3103 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3104 mono_threads_unlock ();
3107 /* Get the suspended events that we'll be waiting for */
3108 for (i = 0; i < wait->num; ++i) {
3109 MonoInternalThread *thread = wait->threads [i];
3111 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3112 || mono_gc_is_finalizer_internal_thread (thread)
3113 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3115 //CloseHandle (wait->handles [i]);
3116 wait->threads [i] = NULL; /* ignore this thread in next loop */
3120 LOCK_THREAD (thread);
3122 if ((thread->state & ThreadState_Suspended) != 0 ||
3123 (thread->state & ThreadState_StopRequested) != 0 ||
3124 (thread->state & ThreadState_Stopped) != 0) {
3125 UNLOCK_THREAD (thread);
3126 CloseHandle (wait->handles [i]);
3127 wait->threads [i] = NULL; /* ignore this thread in next loop */
3133 /* Convert abort requests into suspend requests */
3134 if ((thread->state & ThreadState_AbortRequested) != 0)
3135 thread->state &= ~ThreadState_AbortRequested;
3137 thread->state |= ThreadState_SuspendRequested;
3139 UNLOCK_THREAD (thread);
3141 /* Signal the thread to suspend */
3142 suspend_thread_internal (thread, TRUE);
3144 if (eventidx <= 0) {
3146 * If there are threads which are starting up, we wait until they
3147 * are suspended when they try to register in the threads hash.
3148 * This is guaranteed to finish, since the threads which can create new
3149 * threads get suspended after a while.
3150 * FIXME: The finalizer thread can still create new threads.
3152 mono_threads_lock ();
3153 if (threads_starting_up)
3154 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3157 mono_threads_unlock ();
3159 mono_thread_info_sleep (100, NULL);
3167 MonoInternalThread *thread;
3168 MonoStackFrameInfo *frames;
3169 int nframes, max_frames;
3170 int nthreads, max_threads;
3171 MonoInternalThread **threads;
3172 } ThreadDumpUserData;
3174 static gboolean thread_dump_requested;
3176 /* This needs to be async safe */
3178 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3180 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3182 if (ud->nframes < ud->max_frames) {
3183 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3190 /* This needs to be async safe */
3191 static SuspendThreadResult
3192 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3194 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3195 MonoInternalThread *thread = user_data->thread;
3198 /* This no longer works with remote unwinding */
3200 wapi_desc = wapi_current_thread_desc ();
3201 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3206 if (thread == mono_thread_internal_current ())
3207 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3209 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3211 return MonoResumeThread;
3215 int nthreads, max_threads;
3216 MonoInternalThread **threads;
3217 } CollectThreadsUserData;
3220 collect_thread (gpointer key, gpointer value, gpointer user)
3222 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3223 MonoInternalThread *thread = (MonoInternalThread *)value;
3225 if (ud->nthreads < ud->max_threads)
3226 ud->threads [ud->nthreads ++] = thread;
3230 * Collect running threads into the THREADS array.
3231 * THREADS should be an array allocated on the stack.
3234 collect_threads (MonoInternalThread **thread_array, int max_threads)
3236 CollectThreadsUserData ud;
3238 memset (&ud, 0, sizeof (ud));
3239 /* This array contains refs, but its on the stack, so its ok */
3240 ud.threads = thread_array;
3241 ud.max_threads = max_threads;
3243 mono_threads_lock ();
3244 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3245 mono_threads_unlock ();
3251 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3253 GString* text = g_string_new (0);
3255 GError *error = NULL;
3258 ud->thread = thread;
3261 /* Collect frames for the thread */
3262 if (thread == mono_thread_internal_current ()) {
3263 get_thread_dump (mono_thread_info_current (), ud);
3265 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3269 * Do all the non async-safe work outside of get_thread_dump.
3272 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3274 g_string_append_printf (text, "\n\"%s\"", name);
3277 else if (thread->threadpool_thread) {
3278 g_string_append (text, "\n\"<threadpool thread>\"");
3280 g_string_append (text, "\n\"<unnamed thread>\"");
3283 for (i = 0; i < ud->nframes; ++i) {
3284 MonoStackFrameInfo *frame = &ud->frames [i];
3285 MonoMethod *method = NULL;
3287 if (frame->type == FRAME_TYPE_MANAGED)
3288 method = mono_jit_info_get_method (frame->ji);
3291 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3292 g_string_append_printf (text, " %s\n", location);
3295 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3299 fprintf (stdout, "%s", text->str);
3301 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3302 OutputDebugStringA(text->str);
3305 g_string_free (text, TRUE);
3310 mono_threads_perform_thread_dump (void)
3312 ThreadDumpUserData ud;
3313 MonoInternalThread *thread_array [128];
3314 int tindex, nthreads;
3316 if (!thread_dump_requested)
3319 printf ("Full thread dump:\n");
3321 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3322 nthreads = collect_threads (thread_array, 128);
3324 memset (&ud, 0, sizeof (ud));
3325 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3326 ud.max_frames = 256;
3328 for (tindex = 0; tindex < nthreads; ++tindex)
3329 dump_thread (thread_array [tindex], &ud);
3333 thread_dump_requested = FALSE;
3336 /* Obtain the thread dump of all threads */
3338 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3340 ThreadDumpUserData ud;
3341 MonoInternalThread *thread_array [128];
3342 MonoDomain *domain = mono_domain_get ();
3343 MonoDebugSourceLocation *location;
3344 int tindex, nthreads;
3346 *out_threads = NULL;
3347 *out_stack_frames = NULL;
3349 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3350 nthreads = collect_threads (thread_array, 128);
3352 memset (&ud, 0, sizeof (ud));
3353 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3354 ud.max_frames = 256;
3356 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3357 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3359 for (tindex = 0; tindex < nthreads; ++tindex) {
3360 MonoInternalThread *thread = thread_array [tindex];
3361 MonoArray *thread_frames;
3367 /* Collect frames for the thread */
3368 if (thread == mono_thread_internal_current ()) {
3369 get_thread_dump (mono_thread_info_current (), &ud);
3371 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3374 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3376 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3377 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3379 for (i = 0; i < ud.nframes; ++i) {
3380 MonoStackFrameInfo *frame = &ud.frames [i];
3381 MonoMethod *method = NULL;
3382 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
3384 sf->native_offset = frame->native_offset;
3386 if (frame->type == FRAME_TYPE_MANAGED)
3387 method = mono_jit_info_get_method (frame->ji);
3390 sf->method_address = (gsize) frame->ji->code_start;
3392 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3394 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3396 sf->il_offset = location->il_offset;
3398 if (location && location->source_file) {
3399 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3400 sf->line = location->row;
3401 sf->column = location->column;
3403 mono_debug_free_source_location (location);
3408 mono_array_setref (thread_frames, i, sf);
3416 * mono_threads_request_thread_dump:
3418 * Ask all threads except the current to print their stacktrace to stdout.
3421 mono_threads_request_thread_dump (void)
3423 /*The new thread dump code runs out of the finalizer thread. */
3424 thread_dump_requested = TRUE;
3425 mono_gc_finalize_notify ();
3430 gint allocated; /* +1 so that refs [allocated] == NULL */
3434 typedef struct ref_stack RefStack;
3437 ref_stack_new (gint initial_size)
3441 initial_size = MAX (initial_size, 16) + 1;
3442 rs = g_new0 (RefStack, 1);
3443 rs->refs = g_new0 (gpointer, initial_size);
3444 rs->allocated = initial_size;
3449 ref_stack_destroy (gpointer ptr)
3451 RefStack *rs = (RefStack *)ptr;
3460 ref_stack_push (RefStack *rs, gpointer ptr)
3462 g_assert (rs != NULL);
3464 if (rs->bottom >= rs->allocated) {
3465 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3466 rs->allocated <<= 1;
3467 rs->refs [rs->allocated] = NULL;
3469 rs->refs [rs->bottom++] = ptr;
3473 ref_stack_pop (RefStack *rs)
3475 if (rs == NULL || rs->bottom == 0)
3479 rs->refs [rs->bottom] = NULL;
3483 ref_stack_find (RefStack *rs, gpointer ptr)
3490 for (refs = rs->refs; refs && *refs; refs++) {
3498 * mono_thread_push_appdomain_ref:
3500 * Register that the current thread may have references to objects in domain
3501 * @domain on its stack. Each call to this function should be paired with a
3502 * call to pop_appdomain_ref.
3505 mono_thread_push_appdomain_ref (MonoDomain *domain)
3507 MonoInternalThread *thread = mono_thread_internal_current ();
3510 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3511 SPIN_LOCK (thread->lock_thread_id);
3512 if (thread->appdomain_refs == NULL)
3513 thread->appdomain_refs = ref_stack_new (16);
3514 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3515 SPIN_UNLOCK (thread->lock_thread_id);
3520 mono_thread_pop_appdomain_ref (void)
3522 MonoInternalThread *thread = mono_thread_internal_current ();
3525 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3526 SPIN_LOCK (thread->lock_thread_id);
3527 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3528 SPIN_UNLOCK (thread->lock_thread_id);
3533 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3536 SPIN_LOCK (thread->lock_thread_id);
3537 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3538 SPIN_UNLOCK (thread->lock_thread_id);
3543 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3545 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3548 typedef struct abort_appdomain_data {
3549 struct wait_data wait;
3551 } abort_appdomain_data;
3554 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3556 MonoInternalThread *thread = (MonoInternalThread*)value;
3557 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3558 MonoDomain *domain = data->domain;
3560 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3561 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3563 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3564 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3567 data->wait.handles [data->wait.num] = handle;
3568 data->wait.threads [data->wait.num] = thread;
3571 /* Just ignore the rest, we can't do anything with
3579 * mono_threads_abort_appdomain_threads:
3581 * Abort threads which has references to the given appdomain.
3584 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3586 #ifdef __native_client__
3590 abort_appdomain_data user_data;
3592 int orig_timeout = timeout;
3595 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3597 start_time = mono_msec_ticks ();
3599 mono_threads_lock ();
3601 user_data.domain = domain;
3602 user_data.wait.num = 0;
3603 /* This shouldn't take any locks */
3604 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3605 mono_threads_unlock ();
3607 if (user_data.wait.num > 0) {
3608 /* Abort the threads outside the threads lock */
3609 for (i = 0; i < user_data.wait.num; ++i)
3610 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3613 * We should wait for the threads either to abort, or to leave the
3614 * domain. We can't do the latter, so we wait with a timeout.
3616 wait_for_tids (&user_data.wait, 100);
3619 /* Update remaining time */
3620 timeout -= mono_msec_ticks () - start_time;
3621 start_time = mono_msec_ticks ();
3623 if (orig_timeout != -1 && timeout < 0)
3626 while (user_data.wait.num > 0);
3628 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3634 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3636 MonoInternalThread *thread = (MonoInternalThread*)value;
3637 MonoDomain *domain = (MonoDomain*)user_data;
3640 /* No locking needed here */
3641 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3643 if (thread->cached_culture_info) {
3644 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3645 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3646 if (obj && obj->vtable->domain == domain)
3647 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3653 * mono_threads_clear_cached_culture:
3655 * Clear the cached_current_culture from all threads if it is in the
3659 mono_threads_clear_cached_culture (MonoDomain *domain)
3661 mono_threads_lock ();
3662 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3663 mono_threads_unlock ();
3667 * mono_thread_get_undeniable_exception:
3669 * Return an exception which needs to be raised when leaving a catch clause.
3670 * This is used for undeniable exception propagation.
3673 mono_thread_get_undeniable_exception (void)
3675 MonoInternalThread *thread = mono_thread_internal_current ();
3677 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3679 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3680 * exception if the thread no longer references a dying appdomain.
3682 thread->abort_exc->trace_ips = NULL;
3683 thread->abort_exc->stack_trace = NULL;
3684 return thread->abort_exc;
3690 #if MONO_SMALL_CONFIG
3691 #define NUM_STATIC_DATA_IDX 4
3692 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3696 #define NUM_STATIC_DATA_IDX 8
3697 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3698 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3702 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3703 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3706 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3708 gpointer *static_data = (gpointer *)addr;
3710 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3711 void **ptr = (void **)static_data [i];
3716 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3717 void **p = ptr + idx;
3720 mark_func ((MonoObject**)p, gc_data);
3726 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3728 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3732 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3734 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3738 * mono_alloc_static_data
3740 * Allocate memory blocks for storing threads or context static data
3743 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3745 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3748 gpointer* static_data = *static_data_ptr;
3750 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3751 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3753 if (mono_gc_user_markers_supported ()) {
3754 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3755 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3757 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3758 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3761 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3762 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3763 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3764 *static_data_ptr = static_data;
3765 static_data [0] = static_data;
3768 for (i = 1; i <= idx; ++i) {
3769 if (static_data [i])
3772 if (mono_gc_user_markers_supported ())
3773 static_data [i] = g_malloc0 (static_data_size [i]);
3775 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3776 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3777 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3782 mono_free_static_data (gpointer* static_data)
3785 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3786 gpointer p = static_data [i];
3790 * At this point, the static data pointer array is still registered with the
3791 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3792 * data. Freeing the individual arrays without first nulling their slots
3793 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3794 * such an already freed array. See bug #13813.
3796 static_data [i] = NULL;
3797 mono_memory_write_barrier ();
3798 if (mono_gc_user_markers_supported ())
3801 mono_gc_free_fixed (p);
3803 mono_gc_free_fixed (static_data);
3807 * mono_init_static_data_info
3809 * Initializes static data counters
3811 static void mono_init_static_data_info (StaticDataInfo *static_data)
3813 static_data->idx = 0;
3814 static_data->offset = 0;
3815 static_data->freelist = NULL;
3819 * mono_alloc_static_data_slot
3821 * Generates an offset for static data. static_data contains the counters
3822 * used to generate it.
3825 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3827 if (!static_data->idx && !static_data->offset) {
3829 * we use the first chunk of the first allocation also as
3830 * an array for the rest of the data
3832 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3834 static_data->offset += align - 1;
3835 static_data->offset &= ~(align - 1);
3836 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3837 static_data->idx ++;
3838 g_assert (size <= static_data_size [static_data->idx]);
3839 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3840 static_data->offset = 0;
3842 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
3843 static_data->offset += size;
3848 * ensure thread static fields already allocated are valid for thread
3849 * This function is called when a thread is created or on thread attach.
3852 thread_adjust_static_data (MonoInternalThread *thread)
3854 mono_threads_lock ();
3855 if (thread_static_info.offset || thread_static_info.idx > 0) {
3856 /* get the current allocated size */
3857 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
3858 mono_alloc_static_data (&thread->static_data, offset, TRUE);
3860 mono_threads_unlock ();
3864 * LOCKING: requires that threads_mutex is held
3867 context_adjust_static_data (MonoAppContext *ctx)
3869 if (context_static_info.offset || context_static_info.idx > 0) {
3870 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
3871 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3876 * LOCKING: requires that threads_mutex is held
3879 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3881 MonoInternalThread *thread = (MonoInternalThread *)value;
3882 guint32 offset = GPOINTER_TO_UINT (user);
3884 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3888 * LOCKING: requires that threads_mutex is held
3891 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
3893 uint32_t gch = GPOINTER_TO_INT (key);
3894 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (gch);
3897 mono_gchandle_free (gch);
3898 return TRUE; // Remove this key/value pair
3901 guint32 offset = GPOINTER_TO_UINT (user);
3902 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3904 return FALSE; // Don't remove it
3907 static StaticDataFreeList*
3908 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3910 StaticDataFreeList* prev = NULL;
3911 StaticDataFreeList* tmp = static_data->freelist;
3913 if (tmp->size == size) {
3915 prev->next = tmp->next;
3917 static_data->freelist = tmp->next;
3926 #if SIZEOF_VOID_P == 4
3933 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
3935 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3937 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
3938 MonoBitSet *rb = sets [idx];
3939 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3940 offset /= sizeof (uintptr_t);
3941 /* offset is now the bitmap offset */
3942 for (int i = 0; i < numbits; ++i) {
3943 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3944 mono_bitset_set_fast (rb, offset + i);
3949 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
3951 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3952 MonoBitSet *rb = sets [idx];
3953 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3954 offset /= sizeof (uintptr_t);
3955 /* offset is now the bitmap offset */
3956 for (int i = 0; i < size / sizeof (uintptr_t); i++)
3957 mono_bitset_clear_fast (rb, offset + i);
3961 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3963 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
3965 StaticDataInfo *info;
3968 if (static_type == SPECIAL_STATIC_THREAD) {
3969 info = &thread_static_info;
3970 sets = thread_reference_bitmaps;
3972 info = &context_static_info;
3973 sets = context_reference_bitmaps;
3976 mono_threads_lock ();
3978 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
3982 offset = item->offset;
3985 offset = mono_alloc_static_data_slot (info, size, align);
3988 update_reference_bitmap (sets, offset, bitmap, numbits);
3990 if (static_type == SPECIAL_STATIC_THREAD) {
3991 /* This can be called during startup */
3992 if (threads != NULL)
3993 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3995 if (contexts != NULL)
3996 g_hash_table_foreach_remove (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
3998 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4001 mono_threads_unlock ();
4007 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4009 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4011 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4012 return get_thread_static_data (thread, offset);
4014 return get_context_static_data (thread->current_appcontext, offset);
4019 mono_get_special_static_data (guint32 offset)
4021 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4030 * LOCKING: requires that threads_mutex is held
4033 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4035 MonoInternalThread *thread = (MonoInternalThread *)value;
4036 OffsetSize *data = (OffsetSize *)user;
4037 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4038 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4041 if (!thread->static_data || !thread->static_data [idx])
4043 ptr = ((char*) thread->static_data [idx]) + off;
4044 mono_gc_bzero_atomic (ptr, data->size);
4048 * LOCKING: requires that threads_mutex is held
4051 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4053 uint32_t gch = GPOINTER_TO_INT (key);
4054 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (gch);
4057 mono_gchandle_free (gch);
4058 return TRUE; // Remove this key/value pair
4061 OffsetSize *data = (OffsetSize *)user;
4062 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4063 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4066 if (!ctx->static_data || !ctx->static_data [idx])
4067 return FALSE; // Don't remove this key/value pair
4069 ptr = ((char*) ctx->static_data [idx]) + off;
4070 mono_gc_bzero_atomic (ptr, data->size);
4072 return FALSE; // Don't remove this key/value pair
4076 do_free_special_slot (guint32 offset, guint32 size)
4078 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4080 StaticDataInfo *info;
4082 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4083 info = &thread_static_info;
4084 sets = thread_reference_bitmaps;
4086 info = &context_static_info;
4087 sets = context_reference_bitmaps;
4090 guint32 data_offset = offset;
4091 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4092 OffsetSize data = { data_offset, size };
4094 clear_reference_bitmap (sets, data.offset, data.size);
4096 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4097 if (threads != NULL)
4098 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4100 if (contexts != NULL)
4101 g_hash_table_foreach_remove (contexts, free_context_static_data_helper, &data);
4104 if (!mono_runtime_is_shutting_down ()) {
4105 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4107 item->offset = offset;
4110 item->next = info->freelist;
4111 info->freelist = item;
4116 do_free_special (gpointer key, gpointer value, gpointer data)
4118 MonoClassField *field = (MonoClassField *)key;
4119 guint32 offset = GPOINTER_TO_UINT (value);
4122 size = mono_type_size (field->type, &align);
4123 do_free_special_slot (offset, size);
4127 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4129 mono_threads_lock ();
4131 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4133 mono_threads_unlock ();
4137 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4139 /* Only ever called for ThreadLocal instances */
4140 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4142 mono_threads_lock ();
4143 do_free_special_slot (offset, size);
4144 mono_threads_unlock ();
4148 static void CALLBACK dummy_apc (ULONG_PTR param)
4154 * mono_thread_execute_interruption
4156 * Performs the operation that the requested thread state requires (abort,
4159 static MonoException*
4160 mono_thread_execute_interruption (void)
4162 MonoInternalThread *thread = mono_thread_internal_current ();
4164 LOCK_THREAD (thread);
4166 /* MonoThread::interruption_requested can only be changed with atomics */
4167 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4168 /* this will consume pending APC calls */
4170 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4172 InterlockedDecrement (&thread_interruption_requested);
4174 /* Clear the interrupted flag of the thread so it can wait again */
4175 mono_thread_info_clear_self_interrupt ();
4178 if ((thread->state & ThreadState_AbortRequested) != 0) {
4179 UNLOCK_THREAD (thread);
4180 if (thread->abort_exc == NULL) {
4182 * This might be racy, but it has to be called outside the lock
4183 * since it calls managed code.
4185 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4187 return thread->abort_exc;
4189 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4190 self_suspend_internal (thread);
4193 else if ((thread->state & ThreadState_StopRequested) != 0) {
4194 /* FIXME: do this through the JIT? */
4196 UNLOCK_THREAD (thread);
4198 mono_thread_exit ();
4200 } else if (thread->pending_exception) {
4203 exc = thread->pending_exception;
4204 thread->pending_exception = NULL;
4206 UNLOCK_THREAD (thread);
4208 } else if (thread->thread_interrupt_requested) {
4210 thread->thread_interrupt_requested = FALSE;
4211 UNLOCK_THREAD (thread);
4213 return(mono_get_exception_thread_interrupted ());
4216 UNLOCK_THREAD (thread);
4222 * mono_thread_request_interruption
4224 * A signal handler can call this method to request the interruption of a
4225 * thread. The result of the interruption will depend on the current state of
4226 * the thread. If the result is an exception that needs to be throw, it is
4227 * provided as return value.
4230 mono_thread_request_interruption (gboolean running_managed)
4232 MonoInternalThread *thread = mono_thread_internal_current ();
4234 /* The thread may already be stopping */
4239 if (thread->interrupt_on_stop &&
4240 thread->state & ThreadState_StopRequested &&
4241 thread->state & ThreadState_Background)
4245 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4247 InterlockedIncrement (&thread_interruption_requested);
4249 if (!running_managed || is_running_protected_wrapper ()) {
4250 /* Can't stop while in unmanaged code. Increase the global interruption
4251 request count. When exiting the unmanaged method the count will be
4252 checked and the thread will be interrupted. */
4254 if (mono_thread_notify_pending_exc_fn && !running_managed)
4255 /* The JIT will notify the thread about the interruption */
4256 /* This shouldn't take any locks */
4257 mono_thread_notify_pending_exc_fn (NULL);
4259 /* this will awake the thread if it is in WaitForSingleObject
4261 /* Our implementation of this function ignores the func argument */
4263 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4265 mono_thread_info_self_interrupt ();
4270 return mono_thread_execute_interruption ();
4274 /*This function should be called by a thread after it has exited all of
4275 * its handle blocks at interruption time.*/
4277 mono_thread_resume_interruption (void)
4279 MonoInternalThread *thread = mono_thread_internal_current ();
4280 gboolean still_aborting;
4282 /* The thread may already be stopping */
4286 LOCK_THREAD (thread);
4287 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4288 UNLOCK_THREAD (thread);
4290 /*This can happen if the protected block called Thread::ResetAbort*/
4291 if (!still_aborting)
4294 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4296 InterlockedIncrement (&thread_interruption_requested);
4298 mono_thread_info_self_interrupt ();
4300 return mono_thread_execute_interruption ();
4303 gboolean mono_thread_interruption_requested ()
4305 if (thread_interruption_requested) {
4306 MonoInternalThread *thread = mono_thread_internal_current ();
4307 /* The thread may already be stopping */
4309 return (thread->interruption_requested);
4314 static MonoException*
4315 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4317 MonoInternalThread *thread = mono_thread_internal_current ();
4319 /* The thread may already be stopping */
4323 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4324 MonoException* exc = mono_thread_execute_interruption ();
4332 * Performs the interruption of the current thread, if one has been requested,
4333 * and the thread is not running a protected wrapper.
4334 * Return the exception which needs to be thrown, if any.
4337 mono_thread_interruption_checkpoint (void)
4339 return mono_thread_interruption_checkpoint_request (FALSE);
4343 * Performs the interruption of the current thread, if one has been requested.
4344 * Return the exception which needs to be thrown, if any.
4347 mono_thread_force_interruption_checkpoint_noraise (void)
4349 return mono_thread_interruption_checkpoint_request (TRUE);
4353 * Performs the interruption of the current thread, if one has been requested.
4354 * Throw the exception which needs to be thrown, if any.
4357 mono_thread_force_interruption_checkpoint (void)
4361 ex = mono_thread_interruption_checkpoint_request (TRUE);
4363 mono_raise_exception (ex);
4367 * mono_thread_get_and_clear_pending_exception:
4369 * Return any pending exceptions for the current thread and clear it as a side effect.
4372 mono_thread_get_and_clear_pending_exception (void)
4374 MonoInternalThread *thread = mono_thread_internal_current ();
4376 /* The thread may already be stopping */
4380 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4381 return mono_thread_execute_interruption ();
4384 if (thread->pending_exception) {
4385 MonoException *exc = thread->pending_exception;
4387 thread->pending_exception = NULL;
4395 * mono_set_pending_exception:
4397 * Set the pending exception of the current thread to EXC.
4398 * The exception will be thrown when execution returns to managed code.
4401 mono_set_pending_exception (MonoException *exc)
4403 MonoInternalThread *thread = mono_thread_internal_current ();
4405 /* The thread may already be stopping */
4409 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4411 mono_thread_request_interruption (FALSE);
4415 * mono_thread_interruption_request_flag:
4417 * Returns the address of a flag that will be non-zero if an interruption has
4418 * been requested for a thread. The thread to interrupt may not be the current
4419 * thread, so an additional call to mono_thread_interruption_requested() or
4420 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4423 gint32* mono_thread_interruption_request_flag ()
4425 return &thread_interruption_requested;
4429 mono_thread_init_apartment_state (void)
4432 MonoInternalThread* thread = mono_thread_internal_current ();
4434 /* Positive return value indicates success, either
4435 * S_OK if this is first CoInitialize call, or
4436 * S_FALSE if CoInitialize already called, but with same
4437 * threading model. A negative value indicates failure,
4438 * probably due to trying to change the threading model.
4440 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4441 ? COINIT_APARTMENTTHREADED
4442 : COINIT_MULTITHREADED) < 0) {
4443 thread->apartment_state = ThreadApartmentState_Unknown;
4449 mono_thread_cleanup_apartment_state (void)
4452 MonoInternalThread* thread = mono_thread_internal_current ();
4454 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4461 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4463 LOCK_THREAD (thread);
4464 thread->state |= state;
4465 UNLOCK_THREAD (thread);
4469 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4471 LOCK_THREAD (thread);
4472 thread->state &= ~state;
4473 UNLOCK_THREAD (thread);
4477 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4479 gboolean ret = FALSE;
4481 LOCK_THREAD (thread);
4483 if ((thread->state & test) != 0) {
4487 UNLOCK_THREAD (thread);
4492 static gboolean has_tls_get = FALSE;
4495 mono_runtime_set_has_tls_get (gboolean val)
4501 mono_runtime_has_tls_get (void)
4507 self_interrupt_thread (void *_unused)
4509 MonoThreadInfo *info = mono_thread_info_current ();
4510 MonoException *exc = mono_thread_execute_interruption ();
4511 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4512 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. */
4513 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4517 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4521 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4525 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4527 MonoJitInfo **dest = (MonoJitInfo **)data;
4533 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4535 MonoJitInfo *ji = NULL;
4538 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4543 MonoInternalThread *thread;
4544 gboolean install_async_abort;
4545 MonoThreadInfoInterruptToken *interrupt_token;
4548 static SuspendThreadResult
4549 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4551 AbortThreadData *data = (AbortThreadData *)ud;
4552 MonoInternalThread *thread = data->thread;
4553 MonoJitInfo *ji = NULL;
4554 gboolean protected_wrapper;
4555 gboolean running_managed;
4557 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4558 return MonoResumeThread;
4560 /*someone is already interrupting it*/
4561 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4562 return MonoResumeThread;
4564 InterlockedIncrement (&thread_interruption_requested);
4566 ji = mono_thread_info_get_last_managed (info);
4567 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4568 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4570 if (!protected_wrapper && running_managed) {
4571 /*We are in managed code*/
4572 /*Set the thread to call */
4573 if (data->install_async_abort)
4574 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4575 return MonoResumeThread;
4577 if (mono_thread_notify_pending_exc_fn)
4578 /* The JIT will notify the thread about the interruption */
4579 mono_thread_notify_pending_exc_fn (info);
4582 * This will cause waits to be broken.
4583 * It will also prevent the thread from entering a wait, so if the thread returns
4584 * from the wait before it receives the abort signal, it will just spin in the wait
4585 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4588 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4590 return MonoResumeThread;
4595 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4597 AbortThreadData data = { 0 };
4598 data.thread = thread;
4599 data.install_async_abort = install_async_abort;
4602 FIXME this is insanely broken, it doesn't cause interruption to happen
4603 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4605 if (thread == mono_thread_internal_current ()) {
4606 /* Do it synchronously */
4607 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4609 mono_raise_exception (exc);
4611 mono_thread_info_self_interrupt ();
4616 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4617 if (data.interrupt_token)
4618 mono_thread_info_finish_interrupt (data.interrupt_token);
4619 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4623 MonoInternalThread *thread;
4625 MonoThreadInfoInterruptToken *interrupt_token;
4626 } SuspendThreadData;
4628 static SuspendThreadResult
4629 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4631 SuspendThreadData *data = (SuspendThreadData *)ud;
4632 MonoInternalThread *thread = data->thread;
4633 MonoJitInfo *ji = NULL;
4634 gboolean protected_wrapper;
4635 gboolean running_managed;
4637 ji = mono_thread_info_get_last_managed (info);
4638 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4639 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4641 if (running_managed && !protected_wrapper) {
4642 thread->state &= ~ThreadState_SuspendRequested;
4643 thread->state |= ThreadState_Suspended;
4644 return KeepSuspended;
4646 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4647 InterlockedIncrement (&thread_interruption_requested);
4648 if (data->interrupt)
4649 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4651 if (mono_thread_notify_pending_exc_fn && !running_managed)
4652 /* The JIT will notify the thread about the interruption */
4653 mono_thread_notify_pending_exc_fn (info);
4654 return MonoResumeThread;
4659 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4661 LOCK_THREAD (thread);
4662 if (thread == mono_thread_internal_current ()) {
4663 mono_thread_info_begin_self_suspend ();
4664 //XXX replace this with better named functions
4665 thread->state &= ~ThreadState_SuspendRequested;
4666 thread->state |= ThreadState_Suspended;
4667 UNLOCK_THREAD (thread);
4668 mono_thread_info_end_self_suspend ();
4670 SuspendThreadData data = { 0 };
4671 data.thread = thread;
4672 data.interrupt = interrupt;
4674 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4675 if (data.interrupt_token)
4676 mono_thread_info_finish_interrupt (data.interrupt_token);
4677 UNLOCK_THREAD (thread);
4681 /*This is called with @thread synch_cs held and it must release it*/
4683 self_suspend_internal (MonoInternalThread *thread)
4685 mono_thread_info_begin_self_suspend ();
4686 thread->state &= ~ThreadState_SuspendRequested;
4687 thread->state |= ThreadState_Suspended;
4688 UNLOCK_THREAD (thread);
4689 mono_thread_info_end_self_suspend ();
4694 * mono_thread_is_foreign:
4695 * @thread: the thread to query
4697 * This function allows one to determine if a thread was created by the mono runtime and has
4698 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4700 * Returns: true if @thread was not created by the runtime.
4703 mono_thread_is_foreign (MonoThread *thread)
4705 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4706 return info->runtime_thread == FALSE;
4710 * mono_add_joinable_thread:
4712 * Add TID to the list of joinable threads.
4713 * LOCKING: Acquires the threads lock.
4716 mono_threads_add_joinable_thread (gpointer tid)
4720 * We cannot detach from threads because it causes problems like
4721 * 2fd16f60/r114307. So we collect them and join them when
4722 * we have time (in he finalizer thread).
4724 joinable_threads_lock ();
4725 if (!joinable_threads)
4726 joinable_threads = g_hash_table_new (NULL, NULL);
4727 g_hash_table_insert (joinable_threads, tid, tid);
4728 joinable_thread_count ++;
4729 joinable_threads_unlock ();
4731 mono_gc_finalize_notify ();
4736 * mono_threads_join_threads:
4738 * Join all joinable threads. This is called from the finalizer thread.
4739 * LOCKING: Acquires the threads lock.
4742 mono_threads_join_threads (void)
4745 GHashTableIter iter;
4752 if (!joinable_thread_count)
4756 joinable_threads_lock ();
4758 if (g_hash_table_size (joinable_threads)) {
4759 g_hash_table_iter_init (&iter, joinable_threads);
4760 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4761 thread = (pthread_t)tid;
4762 g_hash_table_remove (joinable_threads, key);
4763 joinable_thread_count --;
4766 joinable_threads_unlock ();
4768 if (thread != pthread_self ())
4769 /* This shouldn't block */
4770 pthread_join (thread, NULL);
4781 * Wait for thread TID to exit.
4782 * LOCKING: Acquires the threads lock.
4785 mono_thread_join (gpointer tid)
4789 gboolean found = FALSE;
4791 joinable_threads_lock ();
4792 if (!joinable_threads)
4793 joinable_threads = g_hash_table_new (NULL, NULL);
4794 if (g_hash_table_lookup (joinable_threads, tid)) {
4795 g_hash_table_remove (joinable_threads, tid);
4796 joinable_thread_count --;
4799 joinable_threads_unlock ();
4802 thread = (pthread_t)tid;
4803 pthread_join (thread, NULL);
4808 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4810 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4811 mono_thread_interruption_checkpoint ();
4814 static inline gboolean
4815 is_appdomainunloaded_exception (MonoClass *klass)
4817 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4819 if (!app_domain_unloaded_exception_klass)
4820 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4821 g_assert (app_domain_unloaded_exception_klass);
4823 return klass == app_domain_unloaded_exception_klass;
4826 static inline gboolean
4827 is_threadabort_exception (MonoClass *klass)
4829 return klass == mono_defaults.threadabortexception_class;
4833 mono_thread_internal_unhandled_exception (MonoObject* exc)
4835 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4836 MonoClass *klass = exc->vtable->klass;
4837 if (is_threadabort_exception (klass)) {
4838 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4839 } else if (!is_appdomainunloaded_exception (klass)) {
4840 mono_unhandled_exception (exc);
4841 if (mono_environment_exitcode_get () == 1)
4848 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4850 mono_threads_get_thread_dump (out_threads, out_stack_traces);