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-internal.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-internal.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 mono_mutex_t threads_mutex;
133 /* Controls access to the 'joinable_threads' hash table */
134 #define joinable_threads_lock() mono_mutex_lock (&joinable_threads_mutex)
135 #define joinable_threads_unlock() mono_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);
207 static gboolean resume_thread_internal (MonoInternalThread *thread);
209 static MonoException* mono_thread_execute_interruption ();
210 static void ref_stack_destroy (gpointer rs);
212 /* Spin lock for InterlockedXXX 64 bit functions */
213 #define mono_interlocked_lock() mono_mutex_lock (&interlocked_mutex)
214 #define mono_interlocked_unlock() mono_mutex_unlock (&interlocked_mutex)
215 static mono_mutex_t interlocked_mutex;
217 /* global count of thread interruptions requested */
218 static gint32 thread_interruption_requested = 0;
220 /* Event signaled when a thread changes its background mode */
221 static HANDLE background_change_event;
223 static gboolean shutting_down = FALSE;
225 static gint32 managed_thread_id_counter = 0;
228 mono_threads_lock (void)
231 mono_locks_acquire (&threads_mutex, ThreadsLock);
232 MONO_FINISH_TRY_BLOCKING;
236 mono_threads_unlock (void)
238 mono_locks_release (&threads_mutex, ThreadsLock);
243 get_next_managed_thread_id (void)
245 return InterlockedIncrement (&managed_thread_id_counter);
249 mono_thread_get_tls_key (void)
251 return current_object_key;
255 mono_thread_get_tls_offset (void)
258 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
262 static inline MonoNativeThreadId
263 thread_get_tid (MonoInternalThread *thread)
265 /* We store the tid as a guint64 to keep the object layout constant between platforms */
266 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
269 /* handle_store() and handle_remove() manage the array of threads that
270 * still need to be waited for when the main thread exits.
272 * If handle_store() returns FALSE the thread must not be started
273 * because Mono is shutting down.
275 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
277 mono_threads_lock ();
279 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
281 if (threads_starting_up)
282 mono_g_hash_table_remove (threads_starting_up, thread);
284 if (shutting_down && !force_attach) {
285 mono_threads_unlock ();
290 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
291 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
294 /* We don't need to duplicate thread->handle, because it is
295 * only closed when the thread object is finalized by the GC.
297 g_assert (thread->internal_thread);
298 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
299 thread->internal_thread);
301 mono_threads_unlock ();
306 static gboolean handle_remove(MonoInternalThread *thread)
309 gsize tid = thread->tid;
311 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
313 mono_threads_lock ();
316 /* We have to check whether the thread object for the
317 * tid is still the same in the table because the
318 * thread might have been destroyed and the tid reused
319 * in the meantime, in which case the tid would be in
320 * the table, but with another thread object.
322 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
323 mono_g_hash_table_remove (threads, (gpointer)tid);
332 mono_threads_unlock ();
334 /* Don't close the handle here, wait for the object finalizer
335 * to do it. Otherwise, the following race condition applies:
337 * 1) Thread exits (and handle_remove() closes the handle)
339 * 2) Some other handle is reassigned the same slot
341 * 3) Another thread tries to join the first thread, and
342 * blocks waiting for the reassigned handle to be signalled
343 * (which might never happen). This is possible, because the
344 * thread calling Join() still has a reference to the first
350 static void ensure_synch_cs_set (MonoInternalThread *thread)
352 mono_mutex_t *synch_cs;
354 if (thread->synch_cs != NULL) {
358 synch_cs = g_new0 (mono_mutex_t, 1);
359 mono_mutex_init_recursive (synch_cs);
361 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
362 synch_cs, NULL) != NULL) {
363 /* Another thread must have installed this CS */
364 mono_mutex_destroy (synch_cs);
370 lock_thread (MonoInternalThread *thread)
372 if (!thread->synch_cs)
373 ensure_synch_cs_set (thread);
375 g_assert (thread->synch_cs);
378 mono_mutex_lock (thread->synch_cs);
379 MONO_FINISH_TRY_BLOCKING;
383 unlock_thread (MonoInternalThread *thread)
385 mono_mutex_unlock (thread->synch_cs);
389 * NOTE: this function can be called also for threads different from the current one:
390 * make sure no code called from it will ever assume it is run on the thread that is
391 * getting cleaned up.
393 static void thread_cleanup (MonoInternalThread *thread)
395 g_assert (thread != NULL);
397 if (thread->abort_state_handle) {
398 mono_gchandle_free (thread->abort_state_handle);
399 thread->abort_state_handle = 0;
401 thread->abort_exc = NULL;
402 thread->current_appcontext = NULL;
405 * This is necessary because otherwise we might have
406 * cross-domain references which will not get cleaned up when
407 * the target domain is unloaded.
409 if (thread->cached_culture_info) {
411 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
412 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
416 * thread->synch_cs can be NULL if this was called after
417 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
418 * This can happen only during shutdown.
419 * The shutting_down flag is not always set, so we can't assert on it.
421 if (thread->synch_cs)
422 LOCK_THREAD (thread);
424 thread->state |= ThreadState_Stopped;
425 thread->state &= ~ThreadState_Background;
427 if (thread->synch_cs)
428 UNLOCK_THREAD (thread);
431 An interruption request has leaked to cleanup. Adjust the global counter.
433 This can happen is the abort source thread finds the abortee (this) thread
434 in unmanaged code. If this thread never trips back to managed code or check
435 the local flag it will be left set and positively unbalance the global counter.
437 Leaving the counter unbalanced will cause a performance degradation since all threads
438 will now keep checking their local flags all the time.
440 if (InterlockedExchange (&thread->interruption_requested, 0))
441 InterlockedDecrement (&thread_interruption_requested);
443 /* if the thread is not in the hash it has been removed already */
444 if (!handle_remove (thread)) {
445 if (thread == mono_thread_internal_current ()) {
446 mono_domain_unset ();
447 mono_memory_barrier ();
449 /* This needs to be called even if handle_remove () fails */
450 if (mono_thread_cleanup_fn)
451 mono_thread_cleanup_fn (thread_get_tid (thread));
454 mono_release_type_locks (thread);
456 mono_profiler_thread_end (thread->tid);
458 if (thread == mono_thread_internal_current ()) {
460 * This will signal async signal handlers that the thread has exited.
461 * The profiler callback needs this to be set, so it cannot be done earlier.
463 mono_domain_unset ();
464 mono_memory_barrier ();
467 if (thread == mono_thread_internal_current ())
468 mono_thread_pop_appdomain_ref ();
470 thread->cached_culture_info = NULL;
472 mono_free_static_data (thread->static_data);
473 thread->static_data = NULL;
474 ref_stack_destroy (thread->appdomain_refs);
475 thread->appdomain_refs = NULL;
477 if (mono_thread_cleanup_fn)
478 mono_thread_cleanup_fn (thread_get_tid (thread));
480 if (mono_gc_is_moving ()) {
481 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
482 thread->thread_pinning_ref = NULL;
487 * A special static data offset (guint32) consists of 3 parts:
489 * [0] 6-bit index into the array of chunks.
490 * [6] 25-bit offset into the array.
491 * [31] Bit indicating thread or context static.
496 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
507 } SpecialStaticOffset;
509 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
510 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
512 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
513 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
514 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
515 (((SpecialStaticOffset *) &(x))->fields.f)
518 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
520 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
522 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
523 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
525 return ((char *) thread->static_data [idx]) + off;
529 get_context_static_data (MonoAppContext *ctx, guint32 offset)
531 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
533 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
534 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
536 return ((char *) ctx->static_data [idx]) + off;
540 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
542 static MonoClassField *current_thread_field = NULL;
546 if (!current_thread_field) {
547 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
548 g_assert (current_thread_field);
551 mono_class_vtable (domain, mono_defaults.thread_class);
552 mono_domain_lock (domain);
553 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
554 mono_domain_unlock (domain);
557 return get_thread_static_data (thread, offset);
561 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
563 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
565 g_assert (current->obj.vtable->domain == domain);
567 g_assert (!*current_thread_ptr);
568 *current_thread_ptr = current;
572 create_thread_object (MonoDomain *domain)
574 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
575 return (MonoThread*)mono_gc_alloc_mature (vt);
579 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
581 MonoThread *thread = create_thread_object (domain);
582 MONO_OBJECT_SETREF (thread, internal_thread, internal);
586 static MonoInternalThread*
587 create_internal_thread (void)
589 MonoInternalThread *thread;
592 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
593 thread = (MonoInternalThread*)mono_gc_alloc_mature (vt);
595 thread->synch_cs = g_new0 (mono_mutex_t, 1);
596 mono_mutex_init_recursive (thread->synch_cs);
598 thread->apartment_state = ThreadApartmentState_Unknown;
599 thread->managed_id = get_next_managed_thread_id ();
600 if (mono_gc_is_moving ()) {
601 thread->thread_pinning_ref = thread;
602 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
609 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
611 MonoDomain *domain = mono_get_root_domain ();
613 if (!candidate || candidate->obj.vtable->domain != domain)
614 candidate = new_thread_with_internal (domain, thread);
615 set_current_thread_for_domain (domain, thread, candidate);
616 g_assert (!thread->root_domain_thread);
617 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
620 static guint32 WINAPI start_wrapper_internal(void *data)
622 MonoThreadInfo *info;
623 StartInfo *start_info = (StartInfo *)data;
624 guint32 (*start_func)(void *);
628 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
631 MonoInternalThread *internal = start_info->obj->internal_thread;
632 MonoObject *start_delegate = start_info->delegate;
633 MonoDomain *domain = start_info->obj->obj.vtable->domain;
635 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
637 /* We can be sure start_info->obj->tid and
638 * start_info->obj->handle have been set, because the thread
639 * was created suspended, and these values were set before the
643 info = mono_thread_info_current ();
645 internal->thread_info = info;
646 internal->small_id = info->small_id;
650 SET_CURRENT_OBJECT (internal);
652 /* Every thread references the appdomain which created it */
653 mono_thread_push_appdomain_ref (domain);
655 if (!mono_domain_set (domain, FALSE)) {
656 /* No point in raising an appdomain_unloaded exception here */
657 /* FIXME: Cleanup here */
658 mono_thread_pop_appdomain_ref ();
662 start_func = start_info->func;
663 start_arg = start_info->obj->start_obj;
665 start_arg = start_info->start_arg;
667 /* We have to do this here because mono_thread_new_init()
668 requires that root_domain_thread is set up. */
669 thread_adjust_static_data (internal);
670 init_root_domain_thread (internal, start_info->obj);
672 /* This MUST be called before any managed code can be
673 * executed, as it calls the callback function that (for the
674 * jit) sets the lmf marker.
676 mono_thread_new_init (tid, &tid, start_func);
677 internal->stack_ptr = &tid;
678 if (domain != mono_get_root_domain ())
679 set_current_thread_for_domain (domain, internal, start_info->obj);
681 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, mono_native_thread_id_get (), getpid (), thread->stack_ptr));
683 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
685 /* On 2.0 profile (and higher), set explicitly since state might have been
687 if (internal->apartment_state == ThreadApartmentState_Unknown)
688 internal->apartment_state = ThreadApartmentState_MTA;
690 mono_thread_init_apartment_state ();
692 if(internal->start_notify!=NULL) {
693 /* Let the thread that called Start() know we're
696 ReleaseSemaphore (internal->start_notify, 1, NULL);
700 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
704 * Call this after calling start_notify, since the profiler callback might want
705 * to lock the thread, and the lock is held by thread_start () which waits for
708 mono_profiler_thread_start (tid);
710 /* if the name was set before starting, we didn't invoke the profiler callback */
711 if (internal->name && (internal->flags & MONO_THREAD_FLAG_NAME_SET)) {
712 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
713 mono_profiler_thread_name (internal->tid, tname);
716 /* start_func is set only for unmanaged start functions */
718 start_func (start_arg);
721 g_assert (start_delegate != NULL);
722 args [0] = start_arg;
723 /* we may want to handle the exception here. See comment below on unhandled exceptions */
724 mono_runtime_delegate_invoke (start_delegate, args, NULL);
727 /* If the thread calls ExitThread at all, this remaining code
728 * will not be executed, but the main thread will eventually
729 * call thread_cleanup() on this thread's behalf.
732 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
734 /* Do any cleanup needed for apartment state. This
735 * cannot be done in thread_cleanup since thread_cleanup could be
736 * called for a thread other than the current thread.
737 * mono_thread_cleanup_apartment_state cleans up apartment
738 * for the current thead */
739 mono_thread_cleanup_apartment_state ();
741 thread_cleanup (internal);
745 /* Remove the reference to the thread object in the TLS data,
746 * so the thread object can be finalized. This won't be
747 * reached if the thread threw an uncaught exception, so those
748 * thread handles will stay referenced :-( (This is due to
749 * missing support for scanning thread-specific data in the
750 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
753 SET_CURRENT_OBJECT (NULL);
758 static guint32 WINAPI start_wrapper(void *data)
762 /* Avoid scanning the frames above this frame during a GC */
763 mono_gc_set_stack_end ((void*)&dummy);
765 return start_wrapper_internal (data);
771 * Common thread creation code.
772 * LOCKING: Acquires the threads lock.
775 create_thread (MonoThread *thread, MonoInternalThread *internal, StartInfo *start_info, gboolean threadpool_thread, guint32 stack_size,
776 gboolean throw_on_failure)
778 HANDLE thread_handle;
779 MonoNativeThreadId tid;
780 guint32 create_flags;
783 * Join joinable threads to prevent running out of threads since the finalizer
784 * thread might be blocked/backlogged.
786 mono_threads_join_threads ();
788 mono_threads_lock ();
791 mono_threads_unlock ();
794 if (threads_starting_up == NULL) {
795 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
796 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
798 mono_g_hash_table_insert (threads_starting_up, thread, thread);
799 mono_threads_unlock ();
801 internal->start_notify = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
802 if (!internal->start_notify) {
803 mono_threads_lock ();
804 mono_g_hash_table_remove (threads_starting_up, thread);
805 mono_threads_unlock ();
806 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
812 stack_size = default_stacksize_for_thread (internal);
814 /* Create suspended, so we can do some housekeeping before the thread
817 create_flags = CREATE_SUSPENDED;
819 MONO_PREPARE_BLOCKING;
820 thread_handle = mono_threads_create_thread ((LPTHREAD_START_ROUTINE)start_wrapper, start_info,
821 stack_size, create_flags, &tid);
822 MONO_FINISH_BLOCKING;
824 if (thread_handle == NULL) {
825 /* The thread couldn't be created, so throw an exception */
826 mono_threads_lock ();
827 mono_g_hash_table_remove (threads_starting_up, thread);
828 mono_threads_unlock ();
830 if (throw_on_failure)
831 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
833 g_warning ("%s: CreateThread error 0x%x", __func__, GetLastError ());
836 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
838 internal->handle = thread_handle;
839 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
841 internal->threadpool_thread = threadpool_thread;
842 if (threadpool_thread)
843 mono_thread_set_state (internal, ThreadState_Background);
845 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
847 /* Only store the handle when the thread is about to be
848 * launched, to avoid the main thread deadlocking while trying
849 * to clean up a thread that will never be signalled.
851 if (!handle_store (thread, FALSE))
854 MONO_PREPARE_BLOCKING;
855 mono_thread_info_resume (tid);
856 MONO_FINISH_BLOCKING;
858 if (internal->start_notify) {
860 * Wait for the thread to set up its TLS data etc, so
861 * theres no potential race condition if someone tries
862 * to look up the data believing the thread has
865 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
867 MONO_PREPARE_BLOCKING;
868 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
869 MONO_FINISH_BLOCKING;
871 CloseHandle (internal->start_notify);
872 internal->start_notify = NULL;
875 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
880 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
882 if (mono_thread_start_cb) {
883 mono_thread_start_cb (tid, stack_start, func);
887 void mono_threads_set_default_stacksize (guint32 stacksize)
889 default_stacksize = stacksize;
892 guint32 mono_threads_get_default_stacksize (void)
894 return default_stacksize;
898 * mono_thread_create_internal:
900 * ARG should not be a GC reference.
903 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
906 MonoInternalThread *internal;
907 StartInfo *start_info;
910 thread = create_thread_object (domain);
911 internal = create_internal_thread ();
912 MONO_OBJECT_SETREF (thread, internal_thread, internal);
914 start_info = g_new0 (StartInfo, 1);
915 start_info->func = func;
916 start_info->obj = thread;
917 start_info->start_arg = arg;
919 res = create_thread (thread, internal, start_info, threadpool_thread, stack_size, TRUE);
923 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
924 if (mono_check_corlib_version () == NULL)
925 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
931 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
933 mono_thread_create_internal (domain, func, arg, FALSE, 0);
937 mono_thread_attach (MonoDomain *domain)
939 return mono_thread_attach_full (domain, FALSE);
943 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
945 MonoThreadInfo *info;
946 MonoInternalThread *thread;
947 MonoThread *current_thread;
948 HANDLE thread_handle;
949 MonoNativeThreadId tid;
951 if ((thread = mono_thread_internal_current ())) {
952 if (domain != mono_domain_get ())
953 mono_domain_set (domain, TRUE);
954 /* Already attached */
955 return mono_thread_current ();
958 if (!mono_gc_register_thread (&domain)) {
959 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 ());
962 thread = create_internal_thread ();
964 thread_handle = mono_thread_info_open_handle ();
965 g_assert (thread_handle);
967 tid=mono_native_thread_id_get ();
969 thread->handle = thread_handle;
970 thread->tid = MONO_NATIVE_THREAD_ID_TO_UINT (tid);
971 thread->stack_ptr = &tid;
973 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
975 info = mono_thread_info_current ();
977 thread->thread_info = info;
978 thread->small_id = info->small_id;
980 current_thread = new_thread_with_internal (domain, thread);
982 if (!handle_store (current_thread, force_attach)) {
983 /* Mono is shutting down, so just wait for the end */
985 mono_thread_info_sleep (10000, NULL);
988 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), thread));
990 SET_CURRENT_OBJECT (thread);
991 mono_domain_set (domain, TRUE);
993 thread_adjust_static_data (thread);
995 init_root_domain_thread (thread, current_thread);
996 if (domain != mono_get_root_domain ())
997 set_current_thread_for_domain (domain, thread, current_thread);
1000 if (mono_thread_attach_cb) {
1004 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1007 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &tid);
1009 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1012 // FIXME: Need a separate callback
1013 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1015 return current_thread;
1019 mono_thread_detach_internal (MonoInternalThread *thread)
1021 g_return_if_fail (thread != NULL);
1023 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1025 thread_cleanup (thread);
1027 SET_CURRENT_OBJECT (NULL);
1028 mono_domain_unset ();
1030 /* Don't need to CloseHandle this thread, even though we took a
1031 * reference in mono_thread_attach (), because the GC will do it
1032 * when the Thread object is finalised.
1037 mono_thread_detach (MonoThread *thread)
1040 mono_thread_detach_internal (thread->internal_thread);
1044 * mono_thread_detach_if_exiting:
1046 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1047 * This should be used at the end of embedding code which calls into managed code, and which
1048 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1051 mono_thread_detach_if_exiting (void)
1053 if (mono_thread_info_is_exiting ()) {
1054 MonoInternalThread *thread;
1056 thread = mono_thread_internal_current ();
1058 mono_thread_detach_internal (thread);
1059 mono_thread_info_detach ();
1067 MonoInternalThread *thread = mono_thread_internal_current ();
1069 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1071 thread_cleanup (thread);
1072 SET_CURRENT_OBJECT (NULL);
1073 mono_domain_unset ();
1075 /* we could add a callback here for embedders to use. */
1076 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1077 exit (mono_environment_exitcode_get ());
1078 mono_thread_info_exit ();
1082 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1084 MonoInternalThread *internal = create_internal_thread ();
1086 internal->state = ThreadState_Unstarted;
1088 InterlockedCompareExchangePointer ((gpointer)&this_obj->internal_thread, internal, NULL);
1092 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1095 StartInfo *start_info;
1096 MonoInternalThread *internal;
1099 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1101 if (!this_obj->internal_thread)
1102 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1103 internal = this_obj->internal_thread;
1105 LOCK_THREAD (internal);
1107 if ((internal->state & ThreadState_Unstarted) == 0) {
1108 UNLOCK_THREAD (internal);
1109 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1113 if ((internal->state & ThreadState_Aborted) != 0) {
1114 UNLOCK_THREAD (internal);
1117 /* This is freed in start_wrapper */
1118 start_info = g_new0 (StartInfo, 1);
1119 start_info->func = NULL;
1120 start_info->start_arg = NULL;
1121 start_info->delegate = start;
1122 start_info->obj = this_obj;
1123 g_assert (this_obj->obj.vtable->domain == mono_domain_get ());
1125 res = create_thread (this_obj, internal, start_info, FALSE, 0, FALSE);
1127 UNLOCK_THREAD (internal);
1131 internal->state &= ~ThreadState_Unstarted;
1133 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1135 UNLOCK_THREAD (internal);
1136 return internal->handle;
1140 * This is called from the finalizer of the internal thread object.
1143 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1145 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1148 * Since threads keep a reference to their thread object while running, by the time this function is called,
1149 * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1150 * when thread_cleanup () can be called after this.
1153 CloseHandle (thread);
1155 if (this_obj->synch_cs) {
1156 mono_mutex_t *synch_cs = this_obj->synch_cs;
1157 this_obj->synch_cs = NULL;
1158 mono_mutex_destroy (synch_cs);
1162 if (this_obj->name) {
1163 void *name = this_obj->name;
1164 this_obj->name = NULL;
1170 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1173 MonoInternalThread *thread = mono_thread_internal_current ();
1175 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1177 mono_thread_current_check_pending_interrupt ();
1180 gboolean alerted = FALSE;
1182 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1184 MONO_PREPARE_BLOCKING
1185 res = mono_thread_info_sleep (ms, &alerted);
1186 MONO_FINISH_BLOCKING
1188 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1191 MonoException* exc = mono_thread_execute_interruption ();
1193 mono_raise_exception (exc);
1205 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1210 ves_icall_System_Threading_Thread_GetDomainID (void)
1212 return mono_domain_get()->domain_id;
1216 ves_icall_System_Threading_Thread_Yield (void)
1218 return mono_thread_info_yield ();
1222 * mono_thread_get_name:
1224 * Return the name of the thread. NAME_LEN is set to the length of the name.
1225 * Return NULL if the thread has no name. The returned memory is owned by the
1229 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1233 LOCK_THREAD (this_obj);
1235 if (!this_obj->name) {
1239 *name_len = this_obj->name_len;
1240 res = g_new (gunichar2, this_obj->name_len);
1241 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1244 UNLOCK_THREAD (this_obj);
1250 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1254 LOCK_THREAD (this_obj);
1256 if (!this_obj->name)
1259 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1261 UNLOCK_THREAD (this_obj);
1267 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1269 LOCK_THREAD (this_obj);
1271 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET) && !this_obj->threadpool_thread) {
1272 UNLOCK_THREAD (this_obj);
1274 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1277 if (this_obj->name) {
1278 g_free (this_obj->name);
1279 this_obj->name_len = 0;
1282 this_obj->name = g_new (gunichar2, mono_string_length (name));
1283 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1284 this_obj->name_len = mono_string_length (name);
1287 this_obj->name = NULL;
1290 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1292 UNLOCK_THREAD (this_obj);
1294 if (this_obj->name && this_obj->tid) {
1295 char *tname = mono_string_to_utf8 (name);
1296 mono_profiler_thread_name (this_obj->tid, tname);
1297 mono_thread_info_set_name (thread_get_tid (this_obj), tname);
1303 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1305 mono_thread_set_name_internal (this_obj, name, TRUE);
1309 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1311 return ThreadPriority_Lowest;
1315 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1319 /* If the array is already in the requested domain, we just return it,
1320 otherwise we return a copy in that domain. */
1322 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1329 if (mono_object_domain (arr) == domain)
1332 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1333 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1338 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1340 return byte_array_to_domain (arr, mono_get_root_domain ());
1344 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1346 return byte_array_to_domain (arr, mono_domain_get ());
1350 mono_thread_current (void)
1352 MonoDomain *domain = mono_domain_get ();
1353 MonoInternalThread *internal = mono_thread_internal_current ();
1354 MonoThread **current_thread_ptr;
1356 g_assert (internal);
1357 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1359 if (!*current_thread_ptr) {
1360 g_assert (domain != mono_get_root_domain ());
1361 *current_thread_ptr = new_thread_with_internal (domain, internal);
1363 return *current_thread_ptr;
1366 /* Return the thread object belonging to INTERNAL in the current domain */
1368 mono_thread_current_for_thread (MonoInternalThread *internal)
1370 MonoDomain *domain = mono_domain_get ();
1371 MonoThread **current_thread_ptr;
1373 g_assert (internal);
1374 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1376 if (!*current_thread_ptr) {
1377 g_assert (domain != mono_get_root_domain ());
1378 *current_thread_ptr = new_thread_with_internal (domain, internal);
1380 return *current_thread_ptr;
1384 mono_thread_internal_current (void)
1386 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1387 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1392 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1394 MonoInternalThread *thread = this_obj->internal_thread;
1395 HANDLE handle = thread->handle;
1396 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1399 mono_thread_current_check_pending_interrupt ();
1401 LOCK_THREAD (thread);
1403 if ((thread->state & ThreadState_Unstarted) != 0) {
1404 UNLOCK_THREAD (thread);
1406 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1410 UNLOCK_THREAD (thread);
1415 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1417 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1419 MONO_PREPARE_BLOCKING;
1420 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1421 MONO_FINISH_BLOCKING;
1423 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1425 if(ret==WAIT_OBJECT_0) {
1426 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1431 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1437 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1445 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1447 MONO_PREPARE_BLOCKING;
1449 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1451 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1452 MONO_FINISH_BLOCKING;
1454 if (ret != WAIT_IO_COMPLETION)
1457 exc = mono_thread_execute_interruption ();
1459 mono_raise_exception (exc);
1464 /* Re-calculate ms according to the time passed */
1465 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1466 if (diff_ms >= ms) {
1470 wait = ms - diff_ms;
1476 /* FIXME: exitContext isnt documented */
1477 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1483 MonoObject *waitHandle;
1484 MonoInternalThread *thread = mono_thread_internal_current ();
1486 /* Do this WaitSleepJoin check before creating objects */
1487 mono_thread_current_check_pending_interrupt ();
1489 /* We fail in managed if the array has more than 64 elements */
1490 numhandles = (guint32)mono_array_length(mono_handles);
1491 handles = g_new0(HANDLE, numhandles);
1493 for(i = 0; i < numhandles; i++) {
1494 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1495 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1502 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1504 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1506 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1510 if(ret==WAIT_FAILED) {
1511 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1513 } else if(ret==WAIT_TIMEOUT) {
1514 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1521 /* FIXME: exitContext isnt documented */
1522 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1524 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1525 uintptr_t numhandles;
1528 MonoObject *waitHandle;
1529 MonoInternalThread *thread = mono_thread_internal_current ();
1531 /* Do this WaitSleepJoin check before creating objects */
1532 mono_thread_current_check_pending_interrupt ();
1534 numhandles = mono_array_length(mono_handles);
1535 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1538 for(i = 0; i < numhandles; i++) {
1539 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1540 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1547 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1549 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1551 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1553 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1556 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1558 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1559 return ret - WAIT_OBJECT_0;
1561 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1562 return ret - WAIT_ABANDONED_0;
1569 /* FIXME: exitContext isnt documented */
1570 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this_obj, HANDLE handle, gint32 ms, gboolean exitContext)
1573 MonoInternalThread *thread = mono_thread_internal_current ();
1575 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1581 mono_thread_current_check_pending_interrupt ();
1583 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1585 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1587 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1589 if(ret==WAIT_FAILED) {
1590 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, mono_native_thread_id_get ()));
1592 } else if(ret==WAIT_TIMEOUT) {
1593 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, mono_native_thread_id_get ()));
1601 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1604 MonoInternalThread *thread = mono_thread_internal_current ();
1609 mono_thread_current_check_pending_interrupt ();
1611 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1613 MONO_PREPARE_BLOCKING;
1614 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1615 MONO_FINISH_BLOCKING;
1617 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1619 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1622 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1629 mutex = CreateMutex (NULL, owned, NULL);
1631 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1633 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1641 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1642 return(ReleaseMutex (handle));
1645 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1651 *error = ERROR_SUCCESS;
1653 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1655 *error = GetLastError ();
1662 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1669 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1671 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1672 mono_string_chars (name));
1674 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1682 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1686 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1691 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1695 *error = ERROR_SUCCESS;
1697 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1699 *error = GetLastError ();
1705 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1712 event = CreateEvent (NULL, manual, initial, NULL);
1714 event = CreateEvent (NULL, manual, initial,
1715 mono_string_chars (name));
1717 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1725 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1726 return (SetEvent(handle));
1729 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1730 return (ResetEvent(handle));
1734 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1735 CloseHandle (handle);
1738 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1744 *error = ERROR_SUCCESS;
1746 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1748 *error = GetLastError ();
1754 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1756 return InterlockedIncrement (location);
1759 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1761 #if SIZEOF_VOID_P == 4
1762 if (G_UNLIKELY ((size_t)location & 0x7)) {
1764 mono_interlocked_lock ();
1767 mono_interlocked_unlock ();
1771 return InterlockedIncrement64 (location);
1774 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1776 return InterlockedDecrement(location);
1779 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1781 #if SIZEOF_VOID_P == 4
1782 if (G_UNLIKELY ((size_t)location & 0x7)) {
1784 mono_interlocked_lock ();
1787 mono_interlocked_unlock ();
1791 return InterlockedDecrement64 (location);
1794 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1796 return InterlockedExchange(location, value);
1799 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1802 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1803 mono_gc_wbarrier_generic_nostore (location);
1807 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1809 return InterlockedExchangePointer(location, value);
1812 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1814 IntFloatUnion val, ret;
1817 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1823 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1825 #if SIZEOF_VOID_P == 4
1826 if (G_UNLIKELY ((size_t)location & 0x7)) {
1828 mono_interlocked_lock ();
1831 mono_interlocked_unlock ();
1835 return InterlockedExchange64 (location, value);
1839 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1841 LongDoubleUnion val, ret;
1844 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1849 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1851 return InterlockedCompareExchange(location, value, comparand);
1854 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1856 gint32 r = InterlockedCompareExchange(location, value, comparand);
1857 *success = r == comparand;
1861 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1864 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1865 mono_gc_wbarrier_generic_nostore (location);
1869 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1871 return InterlockedCompareExchangePointer(location, value, comparand);
1874 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1876 IntFloatUnion val, ret, cmp;
1879 cmp.fval = comparand;
1880 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1886 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1888 #if SIZEOF_VOID_P == 8
1889 LongDoubleUnion val, comp, ret;
1892 comp.fval = comparand;
1893 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1899 mono_interlocked_lock ();
1901 if (old == comparand)
1903 mono_interlocked_unlock ();
1910 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1912 #if SIZEOF_VOID_P == 4
1913 if (G_UNLIKELY ((size_t)location & 0x7)) {
1915 mono_interlocked_lock ();
1917 if (old == comparand)
1919 mono_interlocked_unlock ();
1923 return InterlockedCompareExchange64 (location, value, comparand);
1927 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1930 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1931 mono_gc_wbarrier_generic_nostore (location);
1936 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1939 res = InterlockedExchangePointer ((gpointer *)location, value);
1940 mono_gc_wbarrier_generic_nostore (location);
1945 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1947 return InterlockedAdd (location, value);
1951 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1953 #if SIZEOF_VOID_P == 4
1954 if (G_UNLIKELY ((size_t)location & 0x7)) {
1956 mono_interlocked_lock ();
1959 mono_interlocked_unlock ();
1963 return InterlockedAdd64 (location, value);
1967 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1969 #if SIZEOF_VOID_P == 4
1970 if (G_UNLIKELY ((size_t)location & 0x7)) {
1972 mono_interlocked_lock ();
1974 mono_interlocked_unlock ();
1978 return InterlockedRead64 (location);
1982 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1984 mono_memory_barrier ();
1988 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
1990 mono_thread_clr_state (this, state);
1992 if (state & ThreadState_Background) {
1993 /* If the thread changes the background mode, the main thread has to
1994 * be notified, since it has to rebuild the list of threads to
1997 SetEvent (background_change_event);
2002 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
2004 mono_thread_set_state (this, state);
2006 if (state & ThreadState_Background) {
2007 /* If the thread changes the background mode, the main thread has to
2008 * be notified, since it has to rebuild the list of threads to
2011 SetEvent (background_change_event);
2016 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2022 state = this->state;
2024 UNLOCK_THREAD (this);
2029 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2031 MonoInternalThread *current;
2033 MonoInternalThread *thread = this_obj->internal_thread;
2035 LOCK_THREAD (thread);
2037 current = mono_thread_internal_current ();
2039 thread->thread_interrupt_requested = TRUE;
2040 throw = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2042 UNLOCK_THREAD (thread);
2045 abort_thread_internal (thread, TRUE, FALSE);
2049 void mono_thread_current_check_pending_interrupt ()
2051 MonoInternalThread *thread = mono_thread_internal_current ();
2052 gboolean throw = FALSE;
2054 LOCK_THREAD (thread);
2056 if (thread->thread_interrupt_requested) {
2058 thread->thread_interrupt_requested = FALSE;
2061 UNLOCK_THREAD (thread);
2064 mono_raise_exception (mono_get_exception_thread_interrupted ());
2069 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2071 LOCK_THREAD (thread);
2073 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2074 (thread->state & ThreadState_StopRequested) != 0 ||
2075 (thread->state & ThreadState_Stopped) != 0)
2077 UNLOCK_THREAD (thread);
2081 if ((thread->state & ThreadState_Unstarted) != 0) {
2082 thread->state |= ThreadState_Aborted;
2083 UNLOCK_THREAD (thread);
2087 thread->state |= ThreadState_AbortRequested;
2088 if (thread->abort_state_handle)
2089 mono_gchandle_free (thread->abort_state_handle);
2091 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2092 g_assert (thread->abort_state_handle);
2094 thread->abort_state_handle = 0;
2096 thread->abort_exc = NULL;
2098 UNLOCK_THREAD (thread);
2100 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));
2102 /* During shutdown, we can't wait for other threads */
2104 /* Make sure the thread is awake */
2105 mono_thread_resume (thread);
2107 abort_thread_internal (thread, TRUE, TRUE);
2111 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2113 MonoInternalThread *thread = mono_thread_internal_current ();
2114 gboolean was_aborting;
2116 LOCK_THREAD (thread);
2117 was_aborting = thread->state & ThreadState_AbortRequested;
2118 thread->state &= ~ThreadState_AbortRequested;
2119 UNLOCK_THREAD (thread);
2121 if (!was_aborting) {
2122 const char *msg = "Unable to reset abort because no abort was requested";
2123 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2126 thread->abort_exc = NULL;
2127 if (thread->abort_state_handle) {
2128 mono_gchandle_free (thread->abort_state_handle);
2129 /* This is actually not necessary - the handle
2130 only counts if the exception is set */
2131 thread->abort_state_handle = 0;
2136 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2138 LOCK_THREAD (thread);
2140 thread->state &= ~ThreadState_AbortRequested;
2142 if (thread->abort_exc) {
2143 thread->abort_exc = NULL;
2144 if (thread->abort_state_handle) {
2145 mono_gchandle_free (thread->abort_state_handle);
2146 /* This is actually not necessary - the handle
2147 only counts if the exception is set */
2148 thread->abort_state_handle = 0;
2152 UNLOCK_THREAD (thread);
2156 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2158 MonoInternalThread *thread = this_obj->internal_thread;
2159 MonoObject *state, *deserialized = NULL, *exc;
2162 if (!thread->abort_state_handle)
2165 state = mono_gchandle_get_target (thread->abort_state_handle);
2168 domain = mono_domain_get ();
2169 if (mono_object_domain (state) == domain)
2172 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2174 if (!deserialized) {
2175 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2177 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2178 mono_set_pending_exception (invalid_op_exc);
2182 return deserialized;
2186 mono_thread_suspend (MonoInternalThread *thread)
2188 LOCK_THREAD (thread);
2190 if ((thread->state & ThreadState_Unstarted) != 0 ||
2191 (thread->state & ThreadState_Aborted) != 0 ||
2192 (thread->state & ThreadState_Stopped) != 0)
2194 UNLOCK_THREAD (thread);
2198 if ((thread->state & ThreadState_Suspended) != 0 ||
2199 (thread->state & ThreadState_SuspendRequested) != 0 ||
2200 (thread->state & ThreadState_StopRequested) != 0)
2202 UNLOCK_THREAD (thread);
2206 thread->state |= ThreadState_SuspendRequested;
2208 UNLOCK_THREAD (thread);
2210 suspend_thread_internal (thread, FALSE);
2215 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2217 if (!mono_thread_suspend (this_obj->internal_thread)) {
2218 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2224 mono_thread_resume (MonoInternalThread *thread)
2226 LOCK_THREAD (thread);
2228 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2229 thread->state &= ~ThreadState_SuspendRequested;
2230 UNLOCK_THREAD (thread);
2234 if ((thread->state & ThreadState_Suspended) == 0 ||
2235 (thread->state & ThreadState_Unstarted) != 0 ||
2236 (thread->state & ThreadState_Aborted) != 0 ||
2237 (thread->state & ThreadState_Stopped) != 0)
2239 UNLOCK_THREAD (thread);
2243 return resume_thread_internal (thread);
2247 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2249 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread)) {
2250 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2256 mono_threads_is_critical_method (MonoMethod *method)
2258 switch (method->wrapper_type) {
2259 case MONO_WRAPPER_RUNTIME_INVOKE:
2260 case MONO_WRAPPER_XDOMAIN_INVOKE:
2261 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2268 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2273 if (mono_threads_is_critical_method (m)) {
2274 *((gboolean*)data) = TRUE;
2281 is_running_protected_wrapper (void)
2283 gboolean found = FALSE;
2284 mono_stack_walk (find_wrapper, &found);
2288 void mono_thread_internal_stop (MonoInternalThread *thread)
2290 LOCK_THREAD (thread);
2292 if ((thread->state & ThreadState_StopRequested) != 0 ||
2293 (thread->state & ThreadState_Stopped) != 0)
2295 UNLOCK_THREAD (thread);
2299 /* Make sure the thread is awake */
2300 mono_thread_resume (thread);
2302 thread->state |= ThreadState_StopRequested;
2303 thread->state &= ~ThreadState_AbortRequested;
2305 UNLOCK_THREAD (thread);
2307 abort_thread_internal (thread, TRUE, TRUE);
2310 void mono_thread_stop (MonoThread *thread)
2312 mono_thread_internal_stop (thread->internal_thread);
2316 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2319 mono_atomic_load_acquire (tmp, gint8, (volatile gint8 *) ptr);
2324 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2327 mono_atomic_load_acquire (tmp, gint16, (volatile gint16 *) ptr);
2332 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2335 mono_atomic_load_acquire (tmp, gint32, (volatile gint32 *) ptr);
2340 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2343 mono_atomic_load_acquire (tmp, gint64, (volatile gint64 *) ptr);
2348 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2351 mono_atomic_load_acquire (tmp, volatile void *, (volatile void **) ptr);
2352 return (void *) tmp;
2356 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2358 volatile MonoObject *tmp;
2359 mono_atomic_load_acquire (tmp, volatile MonoObject *, (volatile MonoObject **) ptr);
2360 return (MonoObject *) tmp;
2364 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2367 mono_atomic_load_acquire (tmp, double, (volatile double *) ptr);
2372 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2375 mono_atomic_load_acquire (tmp, float, (volatile float *) ptr);
2380 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2382 return InterlockedRead8 (ptr);
2386 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2388 return InterlockedRead16 (ptr);
2392 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2394 return InterlockedRead (ptr);
2398 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2400 #if SIZEOF_VOID_P == 4
2401 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2403 mono_interlocked_lock ();
2404 val = *(gint64*)ptr;
2405 mono_interlocked_unlock ();
2409 return InterlockedRead64 (ptr);
2413 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2415 return InterlockedReadPointer (ptr);
2419 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2423 #if SIZEOF_VOID_P == 4
2424 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2426 mono_interlocked_lock ();
2427 val = *(double*)ptr;
2428 mono_interlocked_unlock ();
2433 u.ival = InterlockedRead64 (ptr);
2439 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2443 u.ival = InterlockedRead (ptr);
2449 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2451 return InterlockedReadPointer (ptr);
2455 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2457 mono_atomic_store_release ((volatile gint8 *) ptr, value);
2461 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2463 mono_atomic_store_release ((volatile gint16 *) ptr, value);
2467 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2469 mono_atomic_store_release ((volatile gint32 *) ptr, value);
2473 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2475 mono_atomic_store_release ((volatile gint64 *) ptr, value);
2479 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2481 mono_atomic_store_release ((volatile void **) ptr, value);
2485 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2487 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2491 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2493 mono_atomic_store_release ((volatile double *) ptr, value);
2497 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2499 mono_atomic_store_release ((volatile float *) ptr, value);
2503 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2505 InterlockedWrite8 (ptr, value);
2509 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2511 InterlockedWrite16 (ptr, value);
2515 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2517 InterlockedWrite (ptr, value);
2521 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2523 #if SIZEOF_VOID_P == 4
2524 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2525 mono_interlocked_lock ();
2526 *(gint64*)ptr = value;
2527 mono_interlocked_unlock ();
2532 InterlockedWrite64 (ptr, value);
2536 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2538 InterlockedWritePointer (ptr, value);
2542 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2546 #if SIZEOF_VOID_P == 4
2547 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2548 mono_interlocked_lock ();
2549 *(double*)ptr = value;
2550 mono_interlocked_unlock ();
2557 InterlockedWrite64 (ptr, u.ival);
2561 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2567 InterlockedWrite (ptr, u.ival);
2571 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2573 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2577 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2579 mono_threads_lock ();
2581 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2584 contexts = g_hash_table_new (NULL, NULL);
2586 context_adjust_static_data (ctx);
2587 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2588 g_hash_table_insert (contexts, gch, gch);
2590 mono_threads_unlock ();
2592 mono_profiler_context_loaded (ctx);
2596 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2599 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2600 * cleanup in exceptional circumstances, we don't actually do any
2601 * cleanup work here. We instead do this when we iterate the `contexts`
2602 * hash table. The only purpose of this finalizer, at the moment, is to
2603 * notify the profiler.
2606 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2608 mono_profiler_context_unloaded (ctx);
2612 mono_thread_init_tls (void)
2614 MONO_FAST_TLS_INIT (tls_current_object);
2615 mono_native_tls_alloc (¤t_object_key, NULL);
2618 void mono_thread_init (MonoThreadStartCB start_cb,
2619 MonoThreadAttachCB attach_cb)
2621 mono_mutex_init_recursive(&threads_mutex);
2622 mono_mutex_init_recursive(&interlocked_mutex);
2623 mono_mutex_init_recursive(&joinable_threads_mutex);
2625 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2626 g_assert(background_change_event != NULL);
2628 mono_init_static_data_info (&thread_static_info);
2629 mono_init_static_data_info (&context_static_info);
2631 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2633 mono_thread_start_cb = start_cb;
2634 mono_thread_attach_cb = attach_cb;
2636 /* Get a pseudo handle to the current process. This is just a
2637 * kludge so that wapi can build a process handle if needed.
2638 * As a pseudo handle is returned, we don't need to clean
2641 GetCurrentProcess ();
2644 void mono_thread_cleanup (void)
2646 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2647 MonoThreadInfo *info;
2649 /* The main thread must abandon any held mutexes (particularly
2650 * important for named mutexes as they are shared across
2651 * processes, see bug 74680.) This will happen when the
2652 * thread exits, but if it's not running in a subthread it
2653 * won't exit in time.
2655 info = mono_thread_info_current ();
2656 wapi_thread_handle_set_exited (info->handle, mono_environment_exitcode_get ());
2660 /* This stuff needs more testing, it seems one of these
2661 * critical sections can be locked when mono_thread_cleanup is
2664 mono_mutex_destroy (&threads_mutex);
2665 mono_mutex_destroy (&interlocked_mutex);
2666 mono_mutex_destroy (&delayed_free_table_mutex);
2667 mono_mutex_destroy (&small_id_mutex);
2668 CloseHandle (background_change_event);
2671 mono_native_tls_free (current_object_key);
2675 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2677 mono_thread_cleanup_fn = func;
2681 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2683 thread->internal_thread->manage_callback = func;
2686 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2688 mono_thread_notify_pending_exc_fn = func;
2692 static void print_tids (gpointer key, gpointer value, gpointer user)
2694 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2695 * sizeof(uint) and a cast to uint would overflow
2697 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2698 * print this as a pointer.
2700 g_message ("Waiting for: %p", key);
2705 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2706 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2710 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2714 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2716 MONO_PREPARE_BLOCKING;
2717 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2718 MONO_FINISH_BLOCKING;
2720 if(ret==WAIT_FAILED) {
2721 /* See the comment in build_wait_tids() */
2722 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2726 for(i=0; i<wait->num; i++)
2727 CloseHandle (wait->handles[i]);
2729 if (ret == WAIT_TIMEOUT)
2732 for(i=0; i<wait->num; i++) {
2733 gsize tid = wait->threads[i]->tid;
2736 * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2737 * it can still run io-layer etc. code. So wait for it to really exit.
2738 * FIXME: This won't join threads which are not in the joinable_hash yet.
2740 mono_thread_join ((gpointer)tid);
2742 mono_threads_lock ();
2743 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2744 /* This thread must have been killed, because
2745 * it hasn't cleaned itself up. (It's just
2746 * possible that the thread exited before the
2747 * parent thread had a chance to store the
2748 * handle, and now there is another pointer to
2749 * the already-exited thread stored. In this
2750 * case, we'll just get two
2751 * mono_profiler_thread_end() calls for the
2755 mono_threads_unlock ();
2756 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2757 thread_cleanup (wait->threads[i]);
2759 mono_threads_unlock ();
2764 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2766 guint32 i, ret, count;
2768 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2770 /* Add the thread state change event, so it wakes up if a thread changes
2771 * to background mode.
2774 if (count < MAXIMUM_WAIT_OBJECTS) {
2775 wait->handles [count] = background_change_event;
2779 MONO_PREPARE_BLOCKING;
2780 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2781 MONO_FINISH_BLOCKING;
2783 if(ret==WAIT_FAILED) {
2784 /* See the comment in build_wait_tids() */
2785 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2789 for(i=0; i<wait->num; i++)
2790 CloseHandle (wait->handles[i]);
2792 if (ret == WAIT_TIMEOUT)
2795 if (ret < wait->num) {
2796 gsize tid = wait->threads[ret]->tid;
2797 mono_threads_lock ();
2798 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2799 /* See comment in wait_for_tids about thread cleanup */
2800 mono_threads_unlock ();
2801 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2802 thread_cleanup (wait->threads [ret]);
2804 mono_threads_unlock ();
2808 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2810 struct wait_data *wait=(struct wait_data *)user;
2812 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2814 MonoInternalThread *thread=(MonoInternalThread *)value;
2816 /* Ignore background threads, we abort them later */
2817 /* Do not lock here since it is not needed and the caller holds threads_lock */
2818 if (thread->state & ThreadState_Background) {
2819 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2820 return; /* just leave, ignore */
2823 if (mono_gc_is_finalizer_internal_thread (thread)) {
2824 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2828 if (thread == mono_thread_internal_current ()) {
2829 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2833 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2834 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2838 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2839 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2843 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2844 if (handle == NULL) {
2845 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2849 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2850 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2851 wait->handles[wait->num]=handle;
2852 wait->threads[wait->num]=thread;
2855 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2857 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2862 /* Just ignore the rest, we can't do anything with
2869 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2871 struct wait_data *wait=(struct wait_data *)user;
2872 MonoNativeThreadId self = mono_native_thread_id_get ();
2873 MonoInternalThread *thread = value;
2876 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2879 /* The finalizer thread is not a background thread */
2880 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
2881 && (thread->state & ThreadState_Background) != 0
2882 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
2884 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
2888 /* printf ("A: %d\n", wait->num); */
2889 wait->handles[wait->num]=thread->handle;
2890 wait->threads[wait->num]=thread;
2893 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2894 mono_thread_internal_stop (thread);
2898 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
2899 && !mono_gc_is_finalizer_internal_thread (thread);
2903 * mono_threads_set_shutting_down:
2905 * Is called by a thread that wants to shut down Mono. If the runtime is already
2906 * shutting down, the calling thread is suspended/stopped, and this function never
2910 mono_threads_set_shutting_down (void)
2912 MonoInternalThread *current_thread = mono_thread_internal_current ();
2914 mono_threads_lock ();
2916 if (shutting_down) {
2917 mono_threads_unlock ();
2919 /* Make sure we're properly suspended/stopped */
2921 LOCK_THREAD (current_thread);
2923 if ((current_thread->state & ThreadState_SuspendRequested) ||
2924 (current_thread->state & ThreadState_AbortRequested) ||
2925 (current_thread->state & ThreadState_StopRequested)) {
2926 UNLOCK_THREAD (current_thread);
2927 mono_thread_execute_interruption ();
2929 current_thread->state |= ThreadState_Stopped;
2930 UNLOCK_THREAD (current_thread);
2933 /*since we're killing the thread, unset the current domain.*/
2934 mono_domain_unset ();
2936 /* Wake up other threads potentially waiting for us */
2937 mono_thread_info_exit ();
2939 shutting_down = TRUE;
2941 /* Not really a background state change, but this will
2942 * interrupt the main thread if it is waiting for all
2943 * the other threads.
2945 SetEvent (background_change_event);
2947 mono_threads_unlock ();
2951 void mono_thread_manage (void)
2953 struct wait_data wait_data;
2954 struct wait_data *wait = &wait_data;
2956 memset (wait, 0, sizeof (struct wait_data));
2957 /* join each thread that's still running */
2958 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2960 mono_threads_lock ();
2962 THREAD_DEBUG (g_message("%s: No threads", __func__));
2963 mono_threads_unlock ();
2966 mono_threads_unlock ();
2969 mono_threads_lock ();
2970 if (shutting_down) {
2971 /* somebody else is shutting down */
2972 mono_threads_unlock ();
2975 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2976 mono_g_hash_table_foreach (threads, print_tids, NULL));
2978 ResetEvent (background_change_event);
2980 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2981 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2982 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2983 mono_threads_unlock ();
2985 /* Something to wait for */
2986 wait_for_tids_or_state_change (wait, INFINITE);
2988 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2989 } while(wait->num>0);
2991 /* Mono is shutting down, so just wait for the end */
2992 if (!mono_runtime_try_shutdown ()) {
2993 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2994 mono_thread_suspend (mono_thread_internal_current ());
2995 mono_thread_execute_interruption ();
2999 * Remove everything but the finalizer thread and self.
3000 * Also abort all the background threads
3003 mono_threads_lock ();
3006 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3007 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3008 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3010 mono_threads_unlock ();
3012 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3014 /* Something to wait for */
3015 wait_for_tids (wait, INFINITE);
3017 } while (wait->num > 0);
3020 * give the subthreads a chance to really quit (this is mainly needed
3021 * to get correct user and system times from getrusage/wait/time(1)).
3022 * This could be removed if we avoid pthread_detach() and use pthread_join().
3024 mono_thread_info_yield ();
3028 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3030 MonoInternalThread *thread = (MonoInternalThread*)value;
3031 struct wait_data *wait = (struct wait_data*)user_data;
3035 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3037 * This needs no locking.
3039 if ((thread->state & ThreadState_Suspended) != 0 ||
3040 (thread->state & ThreadState_Stopped) != 0)
3043 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3044 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3048 wait->handles [wait->num] = handle;
3049 wait->threads [wait->num] = thread;
3055 * mono_thread_suspend_all_other_threads:
3057 * Suspend all managed threads except the finalizer thread and this thread. It is
3058 * not possible to resume them later.
3060 void mono_thread_suspend_all_other_threads (void)
3062 struct wait_data wait_data;
3063 struct wait_data *wait = &wait_data;
3065 MonoNativeThreadId self = mono_native_thread_id_get ();
3066 guint32 eventidx = 0;
3067 gboolean starting, finished;
3069 memset (wait, 0, sizeof (struct wait_data));
3071 * The other threads could be in an arbitrary state at this point, i.e.
3072 * they could be starting up, shutting down etc. This means that there could be
3073 * threads which are not even in the threads hash table yet.
3077 * First we set a barrier which will be checked by all threads before they
3078 * are added to the threads hash table, and they will exit if the flag is set.
3079 * This ensures that no threads could be added to the hash later.
3080 * We will use shutting_down as the barrier for now.
3082 g_assert (shutting_down);
3085 * We make multiple calls to WaitForMultipleObjects since:
3086 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3087 * - some threads could exit without becoming suspended
3092 * Make a copy of the hashtable since we can't do anything with
3093 * threads while threads_mutex is held.
3096 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3097 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3098 mono_threads_lock ();
3099 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3100 mono_threads_unlock ();
3103 /* Get the suspended events that we'll be waiting for */
3104 for (i = 0; i < wait->num; ++i) {
3105 MonoInternalThread *thread = wait->threads [i];
3107 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3108 || mono_gc_is_finalizer_internal_thread (thread)
3109 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3111 //CloseHandle (wait->handles [i]);
3112 wait->threads [i] = NULL; /* ignore this thread in next loop */
3116 LOCK_THREAD (thread);
3118 if ((thread->state & ThreadState_Suspended) != 0 ||
3119 (thread->state & ThreadState_StopRequested) != 0 ||
3120 (thread->state & ThreadState_Stopped) != 0) {
3121 UNLOCK_THREAD (thread);
3122 CloseHandle (wait->handles [i]);
3123 wait->threads [i] = NULL; /* ignore this thread in next loop */
3129 /* Convert abort requests into suspend requests */
3130 if ((thread->state & ThreadState_AbortRequested) != 0)
3131 thread->state &= ~ThreadState_AbortRequested;
3133 thread->state |= ThreadState_SuspendRequested;
3135 UNLOCK_THREAD (thread);
3137 /* Signal the thread to suspend */
3138 suspend_thread_internal (thread, TRUE);
3140 if (eventidx <= 0) {
3142 * If there are threads which are starting up, we wait until they
3143 * are suspended when they try to register in the threads hash.
3144 * This is guaranteed to finish, since the threads which can create new
3145 * threads get suspended after a while.
3146 * FIXME: The finalizer thread can still create new threads.
3148 mono_threads_lock ();
3149 if (threads_starting_up)
3150 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3153 mono_threads_unlock ();
3155 mono_thread_info_sleep (100, NULL);
3163 MonoInternalThread *thread;
3164 MonoStackFrameInfo *frames;
3165 int nframes, max_frames;
3166 int nthreads, max_threads;
3167 MonoInternalThread **threads;
3168 } ThreadDumpUserData;
3170 static gboolean thread_dump_requested;
3172 /* This needs to be async safe */
3174 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3176 ThreadDumpUserData *ud = data;
3178 if (ud->nframes < ud->max_frames) {
3179 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3186 /* This needs to be async safe */
3187 static SuspendThreadResult
3188 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3190 ThreadDumpUserData *user_data = ud;
3191 MonoInternalThread *thread = user_data->thread;
3194 /* This no longer works with remote unwinding */
3196 wapi_desc = wapi_current_thread_desc ();
3197 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3202 if (thread == mono_thread_internal_current ())
3203 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3205 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3207 return MonoResumeThread;
3211 int nthreads, max_threads;
3212 MonoInternalThread **threads;
3213 } CollectThreadsUserData;
3216 collect_thread (gpointer key, gpointer value, gpointer user)
3218 CollectThreadsUserData *ud = user;
3219 MonoInternalThread *thread = value;
3221 if (ud->nthreads < ud->max_threads)
3222 ud->threads [ud->nthreads ++] = thread;
3226 * Collect running threads into the THREADS array.
3227 * THREADS should be an array allocated on the stack.
3230 collect_threads (MonoInternalThread **thread_array, int max_threads)
3232 CollectThreadsUserData ud;
3234 memset (&ud, 0, sizeof (ud));
3235 /* This array contains refs, but its on the stack, so its ok */
3236 ud.threads = thread_array;
3237 ud.max_threads = max_threads;
3239 mono_threads_lock ();
3240 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3241 mono_threads_unlock ();
3247 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3249 GString* text = g_string_new (0);
3251 GError *error = NULL;
3254 ud->thread = thread;
3257 /* Collect frames for the thread */
3258 if (thread == mono_thread_internal_current ()) {
3259 get_thread_dump (mono_thread_info_current (), ud);
3261 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3265 * Do all the non async-safe work outside of get_thread_dump.
3268 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3270 g_string_append_printf (text, "\n\"%s\"", name);
3273 else if (thread->threadpool_thread) {
3274 g_string_append (text, "\n\"<threadpool thread>\"");
3276 g_string_append (text, "\n\"<unnamed thread>\"");
3279 for (i = 0; i < ud->nframes; ++i) {
3280 MonoStackFrameInfo *frame = &ud->frames [i];
3281 MonoMethod *method = NULL;
3283 if (frame->type == FRAME_TYPE_MANAGED)
3284 method = mono_jit_info_get_method (frame->ji);
3287 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3288 g_string_append_printf (text, " %s\n", location);
3291 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3295 fprintf (stdout, "%s", text->str);
3297 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3298 OutputDebugStringA(text->str);
3301 g_string_free (text, TRUE);
3306 mono_threads_perform_thread_dump (void)
3308 ThreadDumpUserData ud;
3309 MonoInternalThread *thread_array [128];
3310 int tindex, nthreads;
3312 if (!thread_dump_requested)
3315 printf ("Full thread dump:\n");
3317 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3318 nthreads = collect_threads (thread_array, 128);
3320 memset (&ud, 0, sizeof (ud));
3321 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3322 ud.max_frames = 256;
3324 for (tindex = 0; tindex < nthreads; ++tindex)
3325 dump_thread (thread_array [tindex], &ud);
3329 thread_dump_requested = FALSE;
3332 /* Obtain the thread dump of all threads */
3334 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames)
3336 ThreadDumpUserData ud;
3337 MonoInternalThread *thread_array [128];
3338 MonoDomain *domain = mono_domain_get ();
3339 MonoDebugSourceLocation *location;
3340 int tindex, nthreads;
3342 *out_threads = NULL;
3343 *out_stack_frames = NULL;
3345 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3346 nthreads = collect_threads (thread_array, 128);
3348 memset (&ud, 0, sizeof (ud));
3349 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3350 ud.max_frames = 256;
3352 *out_threads = mono_array_new (domain, mono_defaults.thread_class, nthreads);
3353 *out_stack_frames = mono_array_new (domain, mono_defaults.array_class, nthreads);
3355 for (tindex = 0; tindex < nthreads; ++tindex) {
3356 MonoInternalThread *thread = thread_array [tindex];
3357 MonoArray *thread_frames;
3363 /* Collect frames for the thread */
3364 if (thread == mono_thread_internal_current ()) {
3365 get_thread_dump (mono_thread_info_current (), &ud);
3367 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3370 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3372 thread_frames = mono_array_new (domain, mono_defaults.stack_frame_class, ud.nframes);
3373 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3375 for (i = 0; i < ud.nframes; ++i) {
3376 MonoStackFrameInfo *frame = &ud.frames [i];
3377 MonoMethod *method = NULL;
3378 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
3380 sf->native_offset = frame->native_offset;
3382 if (frame->type == FRAME_TYPE_MANAGED)
3383 method = mono_jit_info_get_method (frame->ji);
3386 sf->method_address = (gsize) frame->ji->code_start;
3388 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
3390 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3392 sf->il_offset = location->il_offset;
3394 if (location && location->source_file) {
3395 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3396 sf->line = location->row;
3397 sf->column = location->column;
3399 mono_debug_free_source_location (location);
3404 mono_array_setref (thread_frames, i, sf);
3412 * mono_threads_request_thread_dump:
3414 * Ask all threads except the current to print their stacktrace to stdout.
3417 mono_threads_request_thread_dump (void)
3419 /*The new thread dump code runs out of the finalizer thread. */
3420 thread_dump_requested = TRUE;
3421 mono_gc_finalize_notify ();
3426 gint allocated; /* +1 so that refs [allocated] == NULL */
3430 typedef struct ref_stack RefStack;
3433 ref_stack_new (gint initial_size)
3437 initial_size = MAX (initial_size, 16) + 1;
3438 rs = g_new0 (RefStack, 1);
3439 rs->refs = g_new0 (gpointer, initial_size);
3440 rs->allocated = initial_size;
3445 ref_stack_destroy (gpointer ptr)
3456 ref_stack_push (RefStack *rs, gpointer ptr)
3458 g_assert (rs != NULL);
3460 if (rs->bottom >= rs->allocated) {
3461 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3462 rs->allocated <<= 1;
3463 rs->refs [rs->allocated] = NULL;
3465 rs->refs [rs->bottom++] = ptr;
3469 ref_stack_pop (RefStack *rs)
3471 if (rs == NULL || rs->bottom == 0)
3475 rs->refs [rs->bottom] = NULL;
3479 ref_stack_find (RefStack *rs, gpointer ptr)
3486 for (refs = rs->refs; refs && *refs; refs++) {
3494 * mono_thread_push_appdomain_ref:
3496 * Register that the current thread may have references to objects in domain
3497 * @domain on its stack. Each call to this function should be paired with a
3498 * call to pop_appdomain_ref.
3501 mono_thread_push_appdomain_ref (MonoDomain *domain)
3503 MonoInternalThread *thread = mono_thread_internal_current ();
3506 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3507 SPIN_LOCK (thread->lock_thread_id);
3508 if (thread->appdomain_refs == NULL)
3509 thread->appdomain_refs = ref_stack_new (16);
3510 ref_stack_push (thread->appdomain_refs, domain);
3511 SPIN_UNLOCK (thread->lock_thread_id);
3516 mono_thread_pop_appdomain_ref (void)
3518 MonoInternalThread *thread = mono_thread_internal_current ();
3521 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3522 SPIN_LOCK (thread->lock_thread_id);
3523 ref_stack_pop (thread->appdomain_refs);
3524 SPIN_UNLOCK (thread->lock_thread_id);
3529 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3532 SPIN_LOCK (thread->lock_thread_id);
3533 res = ref_stack_find (thread->appdomain_refs, domain);
3534 SPIN_UNLOCK (thread->lock_thread_id);
3539 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3541 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3544 typedef struct abort_appdomain_data {
3545 struct wait_data wait;
3547 } abort_appdomain_data;
3550 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3552 MonoInternalThread *thread = (MonoInternalThread*)value;
3553 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3554 MonoDomain *domain = data->domain;
3556 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3557 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3559 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3560 HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3563 data->wait.handles [data->wait.num] = handle;
3564 data->wait.threads [data->wait.num] = thread;
3567 /* Just ignore the rest, we can't do anything with
3575 * mono_threads_abort_appdomain_threads:
3577 * Abort threads which has references to the given appdomain.
3580 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3582 #ifdef __native_client__
3586 abort_appdomain_data user_data;
3588 int orig_timeout = timeout;
3591 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3593 start_time = mono_msec_ticks ();
3595 mono_threads_lock ();
3597 user_data.domain = domain;
3598 user_data.wait.num = 0;
3599 /* This shouldn't take any locks */
3600 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3601 mono_threads_unlock ();
3603 if (user_data.wait.num > 0) {
3604 /* Abort the threads outside the threads lock */
3605 for (i = 0; i < user_data.wait.num; ++i)
3606 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3609 * We should wait for the threads either to abort, or to leave the
3610 * domain. We can't do the latter, so we wait with a timeout.
3612 wait_for_tids (&user_data.wait, 100);
3615 /* Update remaining time */
3616 timeout -= mono_msec_ticks () - start_time;
3617 start_time = mono_msec_ticks ();
3619 if (orig_timeout != -1 && timeout < 0)
3622 while (user_data.wait.num > 0);
3624 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3630 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3632 MonoInternalThread *thread = (MonoInternalThread*)value;
3633 MonoDomain *domain = (MonoDomain*)user_data;
3636 /* No locking needed here */
3637 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3639 if (thread->cached_culture_info) {
3640 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3641 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3642 if (obj && obj->vtable->domain == domain)
3643 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3649 * mono_threads_clear_cached_culture:
3651 * Clear the cached_current_culture from all threads if it is in the
3655 mono_threads_clear_cached_culture (MonoDomain *domain)
3657 mono_threads_lock ();
3658 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3659 mono_threads_unlock ();
3663 * mono_thread_get_undeniable_exception:
3665 * Return an exception which needs to be raised when leaving a catch clause.
3666 * This is used for undeniable exception propagation.
3669 mono_thread_get_undeniable_exception (void)
3671 MonoInternalThread *thread = mono_thread_internal_current ();
3673 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3675 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3676 * exception if the thread no longer references a dying appdomain.
3678 thread->abort_exc->trace_ips = NULL;
3679 thread->abort_exc->stack_trace = NULL;
3680 return thread->abort_exc;
3686 #if MONO_SMALL_CONFIG
3687 #define NUM_STATIC_DATA_IDX 4
3688 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3692 #define NUM_STATIC_DATA_IDX 8
3693 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3694 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3698 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3699 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3702 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3704 gpointer *static_data = addr;
3706 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3707 void **ptr = static_data [i];
3712 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3713 void **p = ptr + idx;
3716 mark_func ((MonoObject**)p, gc_data);
3722 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3724 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3728 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3730 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3734 * mono_alloc_static_data
3736 * Allocate memory blocks for storing threads or context static data
3739 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3741 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3744 gpointer* static_data = *static_data_ptr;
3746 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3747 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3749 if (mono_gc_user_markers_supported ()) {
3750 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3751 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3753 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3754 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3757 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3758 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3759 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3760 *static_data_ptr = static_data;
3761 static_data [0] = static_data;
3764 for (i = 1; i <= idx; ++i) {
3765 if (static_data [i])
3768 if (mono_gc_user_markers_supported ())
3769 static_data [i] = g_malloc0 (static_data_size [i]);
3771 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3772 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3773 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3778 mono_free_static_data (gpointer* static_data)
3781 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3782 gpointer p = static_data [i];
3786 * At this point, the static data pointer array is still registered with the
3787 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3788 * data. Freeing the individual arrays without first nulling their slots
3789 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3790 * such an already freed array. See bug #13813.
3792 static_data [i] = NULL;
3793 mono_memory_write_barrier ();
3794 if (mono_gc_user_markers_supported ())
3797 mono_gc_free_fixed (p);
3799 mono_gc_free_fixed (static_data);
3803 * mono_init_static_data_info
3805 * Initializes static data counters
3807 static void mono_init_static_data_info (StaticDataInfo *static_data)
3809 static_data->idx = 0;
3810 static_data->offset = 0;
3811 static_data->freelist = NULL;
3815 * mono_alloc_static_data_slot
3817 * Generates an offset for static data. static_data contains the counters
3818 * used to generate it.
3821 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3823 if (!static_data->idx && !static_data->offset) {
3825 * we use the first chunk of the first allocation also as
3826 * an array for the rest of the data
3828 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3830 static_data->offset += align - 1;
3831 static_data->offset &= ~(align - 1);
3832 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3833 static_data->idx ++;
3834 g_assert (size <= static_data_size [static_data->idx]);
3835 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3836 static_data->offset = 0;
3838 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
3839 static_data->offset += size;
3844 * ensure thread static fields already allocated are valid for thread
3845 * This function is called when a thread is created or on thread attach.
3848 thread_adjust_static_data (MonoInternalThread *thread)
3850 mono_threads_lock ();
3851 if (thread_static_info.offset || thread_static_info.idx > 0) {
3852 /* get the current allocated size */
3853 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
3854 mono_alloc_static_data (&thread->static_data, offset, TRUE);
3856 mono_threads_unlock ();
3860 * LOCKING: requires that threads_mutex is held
3863 context_adjust_static_data (MonoAppContext *ctx)
3865 if (context_static_info.offset || context_static_info.idx > 0) {
3866 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
3867 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3872 * LOCKING: requires that threads_mutex is held
3875 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3877 MonoInternalThread *thread = value;
3878 guint32 offset = GPOINTER_TO_UINT (user);
3880 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3884 * LOCKING: requires that threads_mutex is held
3887 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
3889 uint32_t gch = GPOINTER_TO_INT (key);
3890 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (gch);
3893 mono_gchandle_free (gch);
3894 return TRUE; // Remove this key/value pair
3897 guint32 offset = GPOINTER_TO_UINT (user);
3898 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
3900 return FALSE; // Don't remove it
3903 static StaticDataFreeList*
3904 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3906 StaticDataFreeList* prev = NULL;
3907 StaticDataFreeList* tmp = static_data->freelist;
3909 if (tmp->size == size) {
3911 prev->next = tmp->next;
3913 static_data->freelist = tmp->next;
3922 #if SIZEOF_VOID_P == 4
3929 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
3931 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3933 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
3934 MonoBitSet *rb = sets [idx];
3935 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3936 offset /= sizeof (uintptr_t);
3937 /* offset is now the bitmap offset */
3938 for (int i = 0; i < numbits; ++i) {
3939 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
3940 mono_bitset_set_fast (rb, offset + i);
3945 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
3947 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3948 MonoBitSet *rb = sets [idx];
3949 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
3950 offset /= sizeof (uintptr_t);
3951 /* offset is now the bitmap offset */
3952 for (int i = 0; i < size / sizeof (uintptr_t); i++)
3953 mono_bitset_clear_fast (rb, offset + i);
3957 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3959 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
3961 StaticDataInfo *info;
3964 if (static_type == SPECIAL_STATIC_THREAD) {
3965 info = &thread_static_info;
3966 sets = thread_reference_bitmaps;
3968 info = &context_static_info;
3969 sets = context_reference_bitmaps;
3972 mono_threads_lock ();
3974 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
3978 offset = item->offset;
3981 offset = mono_alloc_static_data_slot (info, size, align);
3984 update_reference_bitmap (sets, offset, bitmap, numbits);
3986 if (static_type == SPECIAL_STATIC_THREAD) {
3987 /* This can be called during startup */
3988 if (threads != NULL)
3989 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3991 if (contexts != NULL)
3992 g_hash_table_foreach_remove (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
3994 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
3997 mono_threads_unlock ();
4003 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4005 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4007 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4008 return get_thread_static_data (thread, offset);
4010 return get_context_static_data (thread->current_appcontext, offset);
4015 mono_get_special_static_data (guint32 offset)
4017 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4026 * LOCKING: requires that threads_mutex is held
4029 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4031 MonoInternalThread *thread = value;
4032 OffsetSize *data = user;
4033 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4034 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4037 if (!thread->static_data || !thread->static_data [idx])
4039 ptr = ((char*) thread->static_data [idx]) + off;
4040 mono_gc_bzero_atomic (ptr, data->size);
4044 * LOCKING: requires that threads_mutex is held
4047 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4049 uint32_t gch = GPOINTER_TO_INT (key);
4050 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (gch);
4053 mono_gchandle_free (gch);
4054 return TRUE; // Remove this key/value pair
4057 OffsetSize *data = user;
4058 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4059 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4062 if (!ctx->static_data || !ctx->static_data [idx])
4063 return FALSE; // Don't remove this key/value pair
4065 ptr = ((char*) ctx->static_data [idx]) + off;
4066 mono_gc_bzero_atomic (ptr, data->size);
4068 return FALSE; // Don't remove this key/value pair
4072 do_free_special_slot (guint32 offset, guint32 size)
4074 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4076 StaticDataInfo *info;
4078 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4079 info = &thread_static_info;
4080 sets = thread_reference_bitmaps;
4082 info = &context_static_info;
4083 sets = context_reference_bitmaps;
4086 guint32 data_offset = offset;
4087 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4088 OffsetSize data = { data_offset, size };
4090 clear_reference_bitmap (sets, data.offset, data.size);
4092 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4093 if (threads != NULL)
4094 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4096 if (contexts != NULL)
4097 g_hash_table_foreach_remove (contexts, free_context_static_data_helper, &data);
4100 if (!mono_runtime_is_shutting_down ()) {
4101 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4103 item->offset = offset;
4106 item->next = info->freelist;
4107 info->freelist = item;
4112 do_free_special (gpointer key, gpointer value, gpointer data)
4114 MonoClassField *field = key;
4115 guint32 offset = GPOINTER_TO_UINT (value);
4118 size = mono_type_size (field->type, &align);
4119 do_free_special_slot (offset, size);
4123 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4125 mono_threads_lock ();
4127 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4129 mono_threads_unlock ();
4133 mono_special_static_data_free_slot (guint32 offset, guint32 size)
4135 /* Only ever called for ThreadLocal instances */
4136 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
4138 mono_threads_lock ();
4139 do_free_special_slot (offset, size);
4140 mono_threads_unlock ();
4144 static void CALLBACK dummy_apc (ULONG_PTR param)
4150 * mono_thread_execute_interruption
4152 * Performs the operation that the requested thread state requires (abort,
4155 static MonoException*
4156 mono_thread_execute_interruption (void)
4158 MonoInternalThread *thread = mono_thread_internal_current ();
4160 LOCK_THREAD (thread);
4162 /* MonoThread::interruption_requested can only be changed with atomics */
4163 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4164 /* this will consume pending APC calls */
4166 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4168 InterlockedDecrement (&thread_interruption_requested);
4170 /* Clear the interrupted flag of the thread so it can wait again */
4171 mono_thread_info_clear_self_interrupt ();
4174 if ((thread->state & ThreadState_AbortRequested) != 0) {
4175 UNLOCK_THREAD (thread);
4176 if (thread->abort_exc == NULL) {
4178 * This might be racy, but it has to be called outside the lock
4179 * since it calls managed code.
4181 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4183 return thread->abort_exc;
4185 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4186 self_suspend_internal (thread);
4189 else if ((thread->state & ThreadState_StopRequested) != 0) {
4190 /* FIXME: do this through the JIT? */
4192 UNLOCK_THREAD (thread);
4194 mono_thread_exit ();
4196 } else if (thread->pending_exception) {
4199 exc = thread->pending_exception;
4200 thread->pending_exception = NULL;
4202 UNLOCK_THREAD (thread);
4204 } else if (thread->thread_interrupt_requested) {
4206 thread->thread_interrupt_requested = FALSE;
4207 UNLOCK_THREAD (thread);
4209 return(mono_get_exception_thread_interrupted ());
4212 UNLOCK_THREAD (thread);
4218 * mono_thread_request_interruption
4220 * A signal handler can call this method to request the interruption of a
4221 * thread. The result of the interruption will depend on the current state of
4222 * the thread. If the result is an exception that needs to be throw, it is
4223 * provided as return value.
4226 mono_thread_request_interruption (gboolean running_managed)
4228 MonoInternalThread *thread = mono_thread_internal_current ();
4230 /* The thread may already be stopping */
4235 if (thread->interrupt_on_stop &&
4236 thread->state & ThreadState_StopRequested &&
4237 thread->state & ThreadState_Background)
4241 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4243 InterlockedIncrement (&thread_interruption_requested);
4245 if (!running_managed || is_running_protected_wrapper ()) {
4246 /* Can't stop while in unmanaged code. Increase the global interruption
4247 request count. When exiting the unmanaged method the count will be
4248 checked and the thread will be interrupted. */
4250 if (mono_thread_notify_pending_exc_fn && !running_managed)
4251 /* The JIT will notify the thread about the interruption */
4252 /* This shouldn't take any locks */
4253 mono_thread_notify_pending_exc_fn (NULL);
4255 /* this will awake the thread if it is in WaitForSingleObject
4257 /* Our implementation of this function ignores the func argument */
4259 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4261 mono_thread_info_self_interrupt ();
4266 return mono_thread_execute_interruption ();
4270 /*This function should be called by a thread after it has exited all of
4271 * its handle blocks at interruption time.*/
4273 mono_thread_resume_interruption (void)
4275 MonoInternalThread *thread = mono_thread_internal_current ();
4276 gboolean still_aborting;
4278 /* The thread may already be stopping */
4282 LOCK_THREAD (thread);
4283 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4284 UNLOCK_THREAD (thread);
4286 /*This can happen if the protected block called Thread::ResetAbort*/
4287 if (!still_aborting)
4290 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4292 InterlockedIncrement (&thread_interruption_requested);
4294 mono_thread_info_self_interrupt ();
4296 return mono_thread_execute_interruption ();
4299 gboolean mono_thread_interruption_requested ()
4301 if (thread_interruption_requested) {
4302 MonoInternalThread *thread = mono_thread_internal_current ();
4303 /* The thread may already be stopping */
4305 return (thread->interruption_requested);
4310 static MonoException*
4311 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4313 MonoInternalThread *thread = mono_thread_internal_current ();
4315 /* The thread may already be stopping */
4319 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4320 MonoException* exc = mono_thread_execute_interruption ();
4328 * Performs the interruption of the current thread, if one has been requested,
4329 * and the thread is not running a protected wrapper.
4330 * Return the exception which needs to be thrown, if any.
4333 mono_thread_interruption_checkpoint (void)
4335 return mono_thread_interruption_checkpoint_request (FALSE);
4339 * Performs the interruption of the current thread, if one has been requested.
4340 * Return the exception which needs to be thrown, if any.
4343 mono_thread_force_interruption_checkpoint_noraise (void)
4345 return mono_thread_interruption_checkpoint_request (TRUE);
4349 * Performs the interruption of the current thread, if one has been requested.
4350 * Throw the exception which needs to be thrown, if any.
4353 mono_thread_force_interruption_checkpoint (void)
4357 ex = mono_thread_interruption_checkpoint_request (TRUE);
4359 mono_raise_exception (ex);
4363 * mono_thread_get_and_clear_pending_exception:
4365 * Return any pending exceptions for the current thread and clear it as a side effect.
4368 mono_thread_get_and_clear_pending_exception (void)
4370 MonoInternalThread *thread = mono_thread_internal_current ();
4372 /* The thread may already be stopping */
4376 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4377 return mono_thread_execute_interruption ();
4380 if (thread->pending_exception) {
4381 MonoException *exc = thread->pending_exception;
4383 thread->pending_exception = NULL;
4391 * mono_set_pending_exception:
4393 * Set the pending exception of the current thread to EXC.
4394 * The exception will be thrown when execution returns to managed code.
4397 mono_set_pending_exception (MonoException *exc)
4399 MonoInternalThread *thread = mono_thread_internal_current ();
4401 /* The thread may already be stopping */
4405 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4407 mono_thread_request_interruption (FALSE);
4411 * mono_thread_interruption_request_flag:
4413 * Returns the address of a flag that will be non-zero if an interruption has
4414 * been requested for a thread. The thread to interrupt may not be the current
4415 * thread, so an additional call to mono_thread_interruption_requested() or
4416 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4419 gint32* mono_thread_interruption_request_flag ()
4421 return &thread_interruption_requested;
4425 mono_thread_init_apartment_state (void)
4428 MonoInternalThread* thread = mono_thread_internal_current ();
4430 /* Positive return value indicates success, either
4431 * S_OK if this is first CoInitialize call, or
4432 * S_FALSE if CoInitialize already called, but with same
4433 * threading model. A negative value indicates failure,
4434 * probably due to trying to change the threading model.
4436 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4437 ? COINIT_APARTMENTTHREADED
4438 : COINIT_MULTITHREADED) < 0) {
4439 thread->apartment_state = ThreadApartmentState_Unknown;
4445 mono_thread_cleanup_apartment_state (void)
4448 MonoInternalThread* thread = mono_thread_internal_current ();
4450 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4457 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4459 LOCK_THREAD (thread);
4460 thread->state |= state;
4461 UNLOCK_THREAD (thread);
4465 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4467 LOCK_THREAD (thread);
4468 thread->state &= ~state;
4469 UNLOCK_THREAD (thread);
4473 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4475 gboolean ret = FALSE;
4477 LOCK_THREAD (thread);
4479 if ((thread->state & test) != 0) {
4483 UNLOCK_THREAD (thread);
4488 static gboolean has_tls_get = FALSE;
4491 mono_runtime_set_has_tls_get (gboolean val)
4497 mono_runtime_has_tls_get (void)
4503 self_interrupt_thread (void *_unused)
4505 MonoThreadInfo *info = mono_thread_info_current ();
4506 MonoException *exc = mono_thread_execute_interruption ();
4507 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4508 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. */
4509 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4513 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4517 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4521 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4523 MonoJitInfo **dest = data;
4529 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4531 MonoJitInfo *ji = NULL;
4534 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4539 MonoInternalThread *thread;
4540 gboolean install_async_abort;
4541 MonoThreadInfoInterruptToken *interrupt_token;
4544 static SuspendThreadResult
4545 abort_thread_critical (MonoThreadInfo *info, gpointer ud)
4547 AbortThreadData *data = ud;
4548 MonoInternalThread *thread = data->thread;
4549 MonoJitInfo *ji = NULL;
4550 gboolean protected_wrapper;
4551 gboolean running_managed;
4553 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4554 return MonoResumeThread;
4556 /*someone is already interrupting it*/
4557 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4558 return MonoResumeThread;
4560 InterlockedIncrement (&thread_interruption_requested);
4562 ji = mono_thread_info_get_last_managed (info);
4563 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4564 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4566 if (!protected_wrapper && running_managed) {
4567 /*We are in managed code*/
4568 /*Set the thread to call */
4569 if (data->install_async_abort)
4570 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4571 return MonoResumeThread;
4573 if (mono_thread_notify_pending_exc_fn)
4574 /* The JIT will notify the thread about the interruption */
4575 mono_thread_notify_pending_exc_fn (info);
4578 * This will cause waits to be broken.
4579 * It will also prevent the thread from entering a wait, so if the thread returns
4580 * from the wait before it receives the abort signal, it will just spin in the wait
4581 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4584 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4586 return MonoResumeThread;
4591 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4593 AbortThreadData data = { 0 };
4594 data.thread = thread;
4595 data.install_async_abort = install_async_abort;
4598 FIXME this is insanely broken, it doesn't cause interruption to happen
4599 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4601 if (thread == mono_thread_internal_current ()) {
4602 /* Do it synchronously */
4603 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4605 mono_raise_exception (exc);
4607 mono_thread_info_self_interrupt ();
4612 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, abort_thread_critical, &data);
4613 if (data.interrupt_token)
4614 mono_thread_info_finish_interrupt (data.interrupt_token);
4615 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4619 MonoInternalThread *thread;
4621 MonoThreadInfoInterruptToken *interrupt_token;
4622 } SuspendThreadData;
4624 static SuspendThreadResult
4625 suspend_thread_critical (MonoThreadInfo *info, gpointer ud)
4627 SuspendThreadData *data = ud;
4628 MonoInternalThread *thread = data->thread;
4629 MonoJitInfo *ji = NULL;
4630 gboolean protected_wrapper;
4631 gboolean running_managed;
4633 ji = mono_thread_info_get_last_managed (info);
4634 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4635 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4637 if (running_managed && !protected_wrapper) {
4638 thread->state &= ~ThreadState_SuspendRequested;
4639 thread->state |= ThreadState_Suspended;
4640 return KeepSuspended;
4642 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4643 InterlockedIncrement (&thread_interruption_requested);
4644 if (data->interrupt)
4645 data->interrupt_token = mono_thread_info_prepare_interrupt (thread->thread_info);
4647 if (mono_thread_notify_pending_exc_fn && !running_managed)
4648 /* The JIT will notify the thread about the interruption */
4649 mono_thread_notify_pending_exc_fn (info);
4650 return MonoResumeThread;
4655 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4657 LOCK_THREAD (thread);
4658 if (thread == mono_thread_internal_current ()) {
4659 mono_thread_info_begin_self_suspend ();
4660 //XXX replace this with better named functions
4661 thread->state &= ~ThreadState_SuspendRequested;
4662 thread->state |= ThreadState_Suspended;
4663 UNLOCK_THREAD (thread);
4664 mono_thread_info_end_self_suspend ();
4666 SuspendThreadData data = { 0 };
4667 data.thread = thread;
4668 data.interrupt = interrupt;
4670 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, suspend_thread_critical, &data);
4671 if (data.interrupt_token)
4672 mono_thread_info_finish_interrupt (data.interrupt_token);
4673 UNLOCK_THREAD (thread);
4677 /*This is called with @thread synch_cs held and it must release it*/
4679 self_suspend_internal (MonoInternalThread *thread)
4681 mono_thread_info_begin_self_suspend ();
4682 thread->state &= ~ThreadState_SuspendRequested;
4683 thread->state |= ThreadState_Suspended;
4684 UNLOCK_THREAD (thread);
4685 mono_thread_info_end_self_suspend ();
4688 /*This is called with @thread synch_cs held and it must release it*/
4690 resume_thread_internal (MonoInternalThread *thread)
4692 UNLOCK_THREAD (thread);
4693 /* Awake the thread */
4694 if (!mono_thread_info_resume (thread_get_tid (thread)))
4696 LOCK_THREAD (thread);
4697 thread->state &= ~ThreadState_Suspended;
4698 UNLOCK_THREAD (thread);
4704 * mono_thread_is_foreign:
4705 * @thread: the thread to query
4707 * This function allows one to determine if a thread was created by the mono runtime and has
4708 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4710 * Returns: true if @thread was not created by the runtime.
4713 mono_thread_is_foreign (MonoThread *thread)
4715 MonoThreadInfo *info = thread->internal_thread->thread_info;
4716 return info->runtime_thread == FALSE;
4720 * mono_add_joinable_thread:
4722 * Add TID to the list of joinable threads.
4723 * LOCKING: Acquires the threads lock.
4726 mono_threads_add_joinable_thread (gpointer tid)
4730 * We cannot detach from threads because it causes problems like
4731 * 2fd16f60/r114307. So we collect them and join them when
4732 * we have time (in he finalizer thread).
4734 joinable_threads_lock ();
4735 if (!joinable_threads)
4736 joinable_threads = g_hash_table_new (NULL, NULL);
4737 g_hash_table_insert (joinable_threads, tid, tid);
4738 joinable_thread_count ++;
4739 joinable_threads_unlock ();
4741 mono_gc_finalize_notify ();
4746 * mono_threads_join_threads:
4748 * Join all joinable threads. This is called from the finalizer thread.
4749 * LOCKING: Acquires the threads lock.
4752 mono_threads_join_threads (void)
4755 GHashTableIter iter;
4762 if (!joinable_thread_count)
4766 joinable_threads_lock ();
4768 if (g_hash_table_size (joinable_threads)) {
4769 g_hash_table_iter_init (&iter, joinable_threads);
4770 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4771 thread = (pthread_t)tid;
4772 g_hash_table_remove (joinable_threads, key);
4773 joinable_thread_count --;
4776 joinable_threads_unlock ();
4778 if (thread != pthread_self ())
4779 /* This shouldn't block */
4780 pthread_join (thread, NULL);
4791 * Wait for thread TID to exit.
4792 * LOCKING: Acquires the threads lock.
4795 mono_thread_join (gpointer tid)
4799 gboolean found = FALSE;
4801 joinable_threads_lock ();
4802 if (!joinable_threads)
4803 joinable_threads = g_hash_table_new (NULL, NULL);
4804 if (g_hash_table_lookup (joinable_threads, tid)) {
4805 g_hash_table_remove (joinable_threads, tid);
4806 joinable_thread_count --;
4809 joinable_threads_unlock ();
4812 thread = (pthread_t)tid;
4813 pthread_join (thread, NULL);
4818 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
4820 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
4821 mono_thread_interruption_checkpoint ();
4824 static inline gboolean
4825 is_appdomainunloaded_exception (MonoClass *klass)
4827 static MonoClass *app_domain_unloaded_exception_klass = NULL;
4829 if (!app_domain_unloaded_exception_klass)
4830 app_domain_unloaded_exception_klass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainUnloadedException");
4831 g_assert (app_domain_unloaded_exception_klass);
4833 return klass == app_domain_unloaded_exception_klass;
4836 static inline gboolean
4837 is_threadabort_exception (MonoClass *klass)
4839 return klass == mono_defaults.threadabortexception_class;
4843 mono_thread_internal_unhandled_exception (MonoObject* exc)
4845 if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
4846 MonoClass *klass = exc->vtable->klass;
4847 if (is_threadabort_exception (klass)) {
4848 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4849 } else if (!is_appdomainunloaded_exception (klass)) {
4850 mono_unhandled_exception (exc);
4851 if (mono_environment_exitcode_get () == 1)
4858 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
4860 mono_threads_get_thread_dump (out_threads, out_stack_traces);