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)
20 #if defined(__OpenBSD__) || defined(__FreeBSD__)
22 #include <pthread_np.h>
25 #include <mono/metadata/object.h>
26 #include <mono/metadata/domain-internals.h>
27 #include <mono/metadata/profiler-private.h>
28 #include <mono/metadata/threads.h>
29 #include <mono/metadata/threadpool.h>
30 #include <mono/metadata/threads-types.h>
31 #include <mono/metadata/exception.h>
32 #include <mono/metadata/environment.h>
33 #include <mono/metadata/monitor.h>
34 #include <mono/metadata/gc-internal.h>
35 #include <mono/metadata/marshal.h>
36 #include <mono/metadata/runtime.h>
37 #include <mono/io-layer/io-layer.h>
39 #include <mono/io-layer/threads.h>
41 #include <mono/metadata/object-internals.h>
42 #include <mono/metadata/mono-debug-debugger.h>
43 #include <mono/utils/mono-compiler.h>
44 #include <mono/utils/mono-mmap.h>
45 #include <mono/utils/mono-membar.h>
46 #include <mono/utils/mono-time.h>
47 #include <mono/utils/mono-threads.h>
48 #include <mono/utils/hazard-pointer.h>
49 #include <mono/utils/mono-tls.h>
50 #include <mono/utils/atomic.h>
52 #include <mono/metadata/gc-internal.h>
54 #ifdef PLATFORM_ANDROID
57 extern int tkill (pid_t tid, int signal);
60 #if defined(PLATFORM_MACOSX) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
61 void *pthread_get_stackaddr_np(pthread_t);
62 size_t pthread_get_stacksize_np(pthread_t);
65 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
66 #define THREAD_DEBUG(a)
67 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
68 #define THREAD_WAIT_DEBUG(a)
69 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
70 #define LIBGC_DEBUG(a)
72 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
73 #define SPIN_LOCK(i) do { \
74 if (SPIN_TRYLOCK (i)) \
78 #define SPIN_UNLOCK(i) i = 0
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 _MonoThreadDomainTls MonoThreadDomainTls;
108 struct _MonoThreadDomainTls {
109 MonoThreadDomainTls *next;
117 MonoThreadDomainTls *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 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
130 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
131 static CRITICAL_SECTION threads_mutex;
133 /* Controls access to context static data */
134 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
135 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
136 static CRITICAL_SECTION contexts_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;
148 * Threads which are starting up and they are not in the 'threads' hash yet.
149 * When handle_store is called for a thread, it will be removed from this hash table.
150 * Protected by mono_threads_lock ().
152 static MonoGHashTable *threads_starting_up = NULL;
154 /* Maps a MonoThread to its start argument */
155 /* Protected by mono_threads_lock () */
156 static MonoGHashTable *thread_start_args = NULL;
158 /* The TLS key that holds the MonoObject assigned to each thread */
159 static MonoNativeTlsKey current_object_key;
161 #ifdef MONO_HAVE_FAST_TLS
162 /* we need to use both the Tls* functions and __thread because
163 * the gc needs to see all the threads
165 MONO_FAST_TLS_DECLARE(tls_current_object);
166 #define SET_CURRENT_OBJECT(x) do { \
167 MONO_FAST_TLS_SET (tls_current_object, x); \
168 mono_native_tls_set_value (current_object_key, x); \
170 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
172 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
173 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
176 /* function called at thread start */
177 static MonoThreadStartCB mono_thread_start_cb = NULL;
179 /* function called at thread attach */
180 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
182 /* function called at thread cleanup */
183 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
185 /* function called to notify the runtime about a pending exception on the current thread */
186 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
188 /* The default stack size for each thread */
189 static guint32 default_stacksize = 0;
190 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
192 static void thread_adjust_static_data (MonoInternalThread *thread);
193 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
194 static void mono_init_static_data_info (StaticDataInfo *static_data);
195 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
196 static gboolean mono_thread_resume (MonoInternalThread* thread);
197 static void mono_thread_start (MonoThread *thread);
198 static void signal_thread_state_change (MonoInternalThread *thread);
199 static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
200 static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
201 static void self_suspend_internal (MonoInternalThread *thread);
202 static gboolean resume_thread_internal (MonoInternalThread *thread);
204 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
205 static void ref_stack_destroy (gpointer rs);
207 /* Spin lock for InterlockedXXX 64 bit functions */
208 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
209 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
210 static CRITICAL_SECTION interlocked_mutex;
212 /* global count of thread interruptions requested */
213 static gint32 thread_interruption_requested = 0;
215 /* Event signaled when a thread changes its background mode */
216 static HANDLE background_change_event;
218 static gboolean shutting_down = FALSE;
220 static gint32 managed_thread_id_counter = 0;
223 get_next_managed_thread_id (void)
225 return InterlockedIncrement (&managed_thread_id_counter);
229 mono_thread_get_tls_key (void)
231 return current_object_key;
235 mono_thread_get_tls_offset (void)
238 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
242 /* handle_store() and handle_remove() manage the array of threads that
243 * still need to be waited for when the main thread exits.
245 * If handle_store() returns FALSE the thread must not be started
246 * because Mono is shutting down.
248 static gboolean handle_store(MonoThread *thread, gboolean force_attach)
250 mono_threads_lock ();
252 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
254 if (threads_starting_up)
255 mono_g_hash_table_remove (threads_starting_up, thread);
257 if (shutting_down && !force_attach) {
258 mono_threads_unlock ();
263 MONO_GC_REGISTER_ROOT_FIXED (threads);
264 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
267 /* We don't need to duplicate thread->handle, because it is
268 * only closed when the thread object is finalized by the GC.
270 g_assert (thread->internal_thread);
271 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
272 thread->internal_thread);
274 mono_threads_unlock ();
279 static gboolean handle_remove(MonoInternalThread *thread)
282 gsize tid = thread->tid;
284 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
286 mono_threads_lock ();
289 /* We have to check whether the thread object for the
290 * tid is still the same in the table because the
291 * thread might have been destroyed and the tid reused
292 * in the meantime, in which case the tid would be in
293 * the table, but with another thread object.
295 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
296 mono_g_hash_table_remove (threads, (gpointer)tid);
305 mono_threads_unlock ();
307 /* Don't close the handle here, wait for the object finalizer
308 * to do it. Otherwise, the following race condition applies:
310 * 1) Thread exits (and handle_remove() closes the handle)
312 * 2) Some other handle is reassigned the same slot
314 * 3) Another thread tries to join the first thread, and
315 * blocks waiting for the reassigned handle to be signalled
316 * (which might never happen). This is possible, because the
317 * thread calling Join() still has a reference to the first
323 static void ensure_synch_cs_set (MonoInternalThread *thread)
325 CRITICAL_SECTION *synch_cs;
327 if (thread->synch_cs != NULL) {
331 synch_cs = g_new0 (CRITICAL_SECTION, 1);
332 InitializeCriticalSection (synch_cs);
334 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
335 synch_cs, NULL) != NULL) {
336 /* Another thread must have installed this CS */
337 DeleteCriticalSection (synch_cs);
343 * NOTE: this function can be called also for threads different from the current one:
344 * make sure no code called from it will ever assume it is run on the thread that is
345 * getting cleaned up.
347 static void thread_cleanup (MonoInternalThread *thread)
349 g_assert (thread != NULL);
351 if (thread->abort_state_handle) {
352 mono_gchandle_free (thread->abort_state_handle);
353 thread->abort_state_handle = 0;
355 thread->abort_exc = NULL;
356 thread->current_appcontext = NULL;
359 * This is necessary because otherwise we might have
360 * cross-domain references which will not get cleaned up when
361 * the target domain is unloaded.
363 if (thread->cached_culture_info) {
365 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
366 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
369 ensure_synch_cs_set (thread);
371 EnterCriticalSection (thread->synch_cs);
373 thread->state |= ThreadState_Stopped;
374 thread->state &= ~ThreadState_Background;
376 LeaveCriticalSection (thread->synch_cs);
379 An interruption request has leaked to cleanup. Adjust the global counter.
381 This can happen is the abort source thread finds the abortee (this) thread
382 in unmanaged code. If this thread never trips back to managed code or check
383 the local flag it will be left set and positively unbalance the global counter.
385 Leaving the counter unbalanced will cause a performance degradation since all threads
386 will now keep checking their local flags all the time.
388 if (InterlockedExchange (&thread->interruption_requested, 0))
389 InterlockedDecrement (&thread_interruption_requested);
391 /* if the thread is not in the hash it has been removed already */
392 if (!handle_remove (thread)) {
393 if (thread == mono_thread_internal_current ()) {
394 mono_domain_unset ();
395 mono_memory_barrier ();
397 /* This needs to be called even if handle_remove () fails */
398 if (mono_thread_cleanup_fn)
399 mono_thread_cleanup_fn (thread);
402 mono_release_type_locks (thread);
404 mono_profiler_thread_end (thread->tid);
406 if (thread == mono_thread_internal_current ()) {
408 * This will signal async signal handlers that the thread has exited.
409 * The profiler callback needs this to be set, so it cannot be done earlier.
411 mono_domain_unset ();
412 mono_memory_barrier ();
415 if (thread == mono_thread_internal_current ())
416 mono_thread_pop_appdomain_ref ();
418 thread->cached_culture_info = NULL;
420 mono_free_static_data (thread->static_data, TRUE);
421 thread->static_data = NULL;
422 ref_stack_destroy (thread->appdomain_refs);
423 thread->appdomain_refs = NULL;
425 if (mono_thread_cleanup_fn)
426 mono_thread_cleanup_fn (thread);
428 if (mono_gc_is_moving ()) {
429 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
430 thread->thread_pinning_ref = NULL;
436 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
439 g_assert ((offset & 0x80000000) == 0);
440 offset &= 0x7fffffff;
441 idx = (offset >> 24) - 1;
442 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
446 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
448 static MonoClassField *current_thread_field = NULL;
452 if (!current_thread_field) {
453 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
454 g_assert (current_thread_field);
457 mono_class_vtable (domain, mono_defaults.thread_class);
458 mono_domain_lock (domain);
459 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
460 mono_domain_unlock (domain);
463 return get_thread_static_data (thread, offset);
467 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
469 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
471 g_assert (current->obj.vtable->domain == domain);
473 g_assert (!*current_thread_ptr);
474 *current_thread_ptr = current;
477 static MonoInternalThread*
478 create_internal_thread_object (void)
480 MonoVTable *vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
481 return (MonoInternalThread*)mono_gc_alloc_mature (vt);
485 create_thread_object (MonoDomain *domain)
487 MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
488 return (MonoThread*)mono_gc_alloc_mature (vt);
492 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
494 MonoThread *thread = create_thread_object (domain);
495 MONO_OBJECT_SETREF (thread, internal_thread, internal);
500 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
502 MonoDomain *domain = mono_get_root_domain ();
504 if (!candidate || candidate->obj.vtable->domain != domain)
505 candidate = new_thread_with_internal (domain, thread);
506 set_current_thread_for_domain (domain, thread, candidate);
507 g_assert (!thread->root_domain_thread);
508 MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
511 static guint32 WINAPI start_wrapper_internal(void *data)
513 MonoThreadInfo *info;
514 struct StartInfo *start_info=(struct StartInfo *)data;
515 guint32 (*start_func)(void *);
519 * We don't create a local to hold start_info->obj, so hopefully it won't get pinned during a
522 MonoInternalThread *internal = start_info->obj->internal_thread;
523 MonoObject *start_delegate = start_info->delegate;
524 MonoDomain *domain = start_info->obj->obj.vtable->domain;
526 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
528 /* We can be sure start_info->obj->tid and
529 * start_info->obj->handle have been set, because the thread
530 * was created suspended, and these values were set before the
534 info = mono_thread_info_current ();
536 internal->thread_info = info;
541 SET_CURRENT_OBJECT (internal);
543 mono_monitor_init_tls ();
545 /* Every thread references the appdomain which created it */
546 mono_thread_push_appdomain_ref (domain);
548 if (!mono_domain_set (domain, FALSE)) {
549 /* No point in raising an appdomain_unloaded exception here */
550 /* FIXME: Cleanup here */
551 mono_thread_pop_appdomain_ref ();
555 start_func = start_info->func;
556 start_arg = start_info->start_arg;
558 /* We have to do this here because mono_thread_new_init()
559 requires that root_domain_thread is set up. */
560 thread_adjust_static_data (internal);
561 init_root_domain_thread (internal, start_info->obj);
563 /* This MUST be called before any managed code can be
564 * executed, as it calls the callback function that (for the
565 * jit) sets the lmf marker.
567 mono_thread_new_init (tid, &tid, start_func);
568 internal->stack_ptr = &tid;
570 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
572 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
574 /* On 2.0 profile (and higher), set explicitly since state might have been
576 if (internal->apartment_state == ThreadApartmentState_Unknown)
577 internal->apartment_state = ThreadApartmentState_MTA;
579 mono_thread_init_apartment_state ();
581 if(internal->start_notify!=NULL) {
582 /* Let the thread that called Start() know we're
585 ReleaseSemaphore (internal->start_notify, 1, NULL);
588 mono_threads_lock ();
589 mono_g_hash_table_remove (thread_start_args, start_info->obj);
590 mono_threads_unlock ();
592 mono_thread_set_execution_context (start_info->obj->ec_to_set);
593 start_info->obj->ec_to_set = NULL;
596 THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
600 * Call this after calling start_notify, since the profiler callback might want
601 * to lock the thread, and the lock is held by thread_start () which waits for
604 mono_profiler_thread_start (tid);
606 /* start_func is set only for unmanaged start functions */
608 start_func (start_arg);
611 g_assert (start_delegate != NULL);
612 args [0] = start_arg;
613 /* we may want to handle the exception here. See comment below on unhandled exceptions */
614 mono_runtime_delegate_invoke (start_delegate, args, NULL);
617 /* If the thread calls ExitThread at all, this remaining code
618 * will not be executed, but the main thread will eventually
619 * call thread_cleanup() on this thread's behalf.
622 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
624 /* Do any cleanup needed for apartment state. This
625 * cannot be done in thread_cleanup since thread_cleanup could be
626 * called for a thread other than the current thread.
627 * mono_thread_cleanup_apartment_state cleans up apartment
628 * for the current thead */
629 mono_thread_cleanup_apartment_state ();
631 thread_cleanup (internal);
633 /* Remove the reference to the thread object in the TLS data,
634 * so the thread object can be finalized. This won't be
635 * reached if the thread threw an uncaught exception, so those
636 * thread handles will stay referenced :-( (This is due to
637 * missing support for scanning thread-specific data in the
638 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
641 SET_CURRENT_OBJECT (NULL);
646 static guint32 WINAPI start_wrapper(void *data)
650 /* Avoid scanning the frames above this frame during a GC */
651 mono_gc_set_stack_end ((void*)&dummy);
653 return start_wrapper_internal (data);
656 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
658 if (mono_thread_start_cb) {
659 mono_thread_start_cb (tid, stack_start, func);
663 void mono_threads_set_default_stacksize (guint32 stacksize)
665 default_stacksize = stacksize;
668 guint32 mono_threads_get_default_stacksize (void)
670 return default_stacksize;
674 * mono_create_thread:
676 * This is a wrapper around CreateThread which handles differences in the type of
677 * the the 'tid' argument.
679 gpointer mono_create_thread (WapiSecurityAttributes *security,
680 guint32 stacksize, WapiThreadStart start,
681 gpointer param, guint32 create, gsize *tid)
688 res = mono_threads_CreateThread (security, stacksize, start, param, create, &real_tid);
692 res = CreateThread (security, stacksize, start, param, create, tid);
699 * The thread start argument may be an object reference, and there is
700 * no ref to keep it alive when the new thread is started but not yet
701 * registered with the collector. So we store it in a GC tracked hash
704 * LOCKING: Assumes the threads lock is held.
707 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
709 if (thread_start_args == NULL) {
710 MONO_GC_REGISTER_ROOT_FIXED (thread_start_args);
711 thread_start_args = mono_g_hash_table_new (NULL, NULL);
713 mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
717 * mono_thread_create_internal:
719 * If NO_DETACH is TRUE, then the thread is not detached using pthread_detach (). This is needed to fix the race condition where waiting for a thred to exit only waits for its exit event to be
720 * signalled, which can cause shutdown crashes if the thread shutdown code accesses data already freed by the runtime shutdown.
721 * Currently, this is only used for the finalizer thread.
724 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, gboolean no_detach, guint32 stack_size)
727 MonoInternalThread *internal;
728 HANDLE thread_handle;
729 struct StartInfo *start_info;
731 guint32 create_flags;
733 thread = create_thread_object (domain);
734 internal = create_internal_thread_object ();
735 MONO_OBJECT_SETREF (thread, internal_thread, internal);
737 start_info=g_new0 (struct StartInfo, 1);
738 start_info->func = func;
739 start_info->obj = thread;
740 start_info->start_arg = arg;
742 mono_threads_lock ();
744 mono_threads_unlock ();
748 if (threads_starting_up == NULL) {
749 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
750 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
753 register_thread_start_argument (thread, start_info);
754 mono_g_hash_table_insert (threads_starting_up, thread, thread);
755 mono_threads_unlock ();
758 stack_size = default_stacksize_for_thread (internal);
760 /* Create suspended, so we can do some housekeeping before the thread
763 create_flags = CREATE_SUSPENDED;
766 create_flags |= CREATE_NO_DETACH;
768 thread_handle = mono_create_thread (NULL, stack_size, (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
770 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
771 if (thread_handle == NULL) {
772 /* The thread couldn't be created, so throw an exception */
773 mono_threads_lock ();
774 mono_g_hash_table_remove (threads_starting_up, thread);
775 mono_threads_unlock ();
777 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
781 internal->handle=thread_handle;
783 internal->apartment_state=ThreadApartmentState_Unknown;
784 internal->managed_id = get_next_managed_thread_id ();
785 if (mono_gc_is_moving ()) {
786 internal->thread_pinning_ref = internal;
787 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
790 internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
791 InitializeCriticalSection (internal->synch_cs);
793 internal->threadpool_thread = threadpool_thread;
794 if (threadpool_thread)
795 mono_thread_set_state (internal, ThreadState_Background);
797 if (handle_store (thread, FALSE))
798 ResumeThread (thread_handle);
800 /* Check that the managed and unmanaged layout of MonoInternalThread matches */
801 if (mono_check_corlib_version () == NULL)
802 g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
808 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
810 mono_thread_create_internal (domain, func, arg, FALSE, FALSE, 0);
813 #if defined(HOST_WIN32) && defined(__GNUC__)
814 static __inline__ __attribute__((always_inline))
815 /* This is not defined by gcc */
817 __readfsdword (unsigned long long offset)
819 unsigned long long value;
820 __asm__("movl %%fs:%a[offset], %k[value]" : [value] "=q" (value) : [offset] "irm" (offset));
826 * mono_thread_get_stack_bounds:
828 * Return the address and size of the current threads stack. Return NULL as the
829 * stack address if the stack address cannot be determined.
832 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
834 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
835 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
836 *stsize = pthread_get_stacksize_np (pthread_self ());
838 /* staddr points to the start of the stack, not the end */
840 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
842 /* FIXME: simplify the mess below */
843 #elif defined(HOST_WIN32)
844 /* http://en.wikipedia.org/wiki/Win32_Thread_Information_Block */
845 void* tib = (void*)__readfsdword(0x18);
846 guint8 *stackTop = (guint8*)*(int*)((char*)tib + 4);
847 guint8 *stackBottom = (guint8*)*(int*)((char*)tib + 8);
849 *staddr = stackBottom;
850 *stsize = stackTop - stackBottom;
854 guint8 *current = (guint8*)&attr;
857 *stsize = (size_t)-1;
859 pthread_attr_init (&attr);
860 # ifdef HAVE_PTHREAD_GETATTR_NP
861 pthread_getattr_np (pthread_self(), &attr);
863 # ifdef HAVE_PTHREAD_ATTR_GET_NP
864 pthread_attr_get_np (pthread_self(), &attr);
867 pthread_attr_getstacksize (&attr, &stsize);
868 # elif defined(__OpenBSD__)
872 rslt = pthread_stackseg_np(pthread_self(), &ss);
873 g_assert (rslt == 0);
875 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
876 *stsize = ss.ss_size;
885 # if defined(__native_client__)
887 pthread_attr_getstacksize (&attr, &stsize);
888 # elif !defined(__OpenBSD__)
889 pthread_attr_getstack (&attr, (void**)staddr, stsize);
892 g_assert ((current > *staddr) && (current < *staddr + *stsize));
895 pthread_attr_destroy (&attr);
898 /* When running under emacs, sometimes staddr is not aligned to a page size */
899 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
903 mono_thread_attach (MonoDomain *domain)
905 return mono_thread_attach_full (domain, FALSE);
909 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
911 MonoThreadInfo *info;
912 MonoInternalThread *thread;
913 MonoThread *current_thread;
914 HANDLE thread_handle;
917 if ((thread = mono_thread_internal_current ())) {
918 if (domain != mono_domain_get ())
919 mono_domain_set (domain, TRUE);
920 /* Already attached */
921 return mono_thread_current ();
924 if (!mono_gc_register_thread (&domain)) {
925 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.", GetCurrentThreadId ());
928 thread = create_internal_thread_object ();
930 thread_handle = GetCurrentThread ();
931 g_assert (thread_handle);
933 tid=GetCurrentThreadId ();
936 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
937 * refer to the thread from other threads for things like aborting.
939 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
940 THREAD_ALL_ACCESS, TRUE, 0);
942 thread->handle=thread_handle;
944 #ifdef PLATFORM_ANDROID
945 thread->android_tid = (gpointer) gettid ();
947 thread->apartment_state=ThreadApartmentState_Unknown;
948 thread->managed_id = get_next_managed_thread_id ();
949 if (mono_gc_is_moving ()) {
950 thread->thread_pinning_ref = thread;
951 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
954 thread->stack_ptr = &tid;
956 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
957 InitializeCriticalSection (thread->synch_cs);
959 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
961 info = mono_thread_info_current ();
963 thread->thread_info = info;
965 current_thread = new_thread_with_internal (domain, thread);
967 if (!handle_store (current_thread, force_attach)) {
968 /* Mono is shutting down, so just wait for the end */
973 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
975 SET_CURRENT_OBJECT (thread);
976 mono_domain_set (domain, TRUE);
978 mono_monitor_init_tls ();
980 thread_adjust_static_data (thread);
982 init_root_domain_thread (thread, current_thread);
983 if (domain != mono_get_root_domain ())
984 set_current_thread_for_domain (domain, thread, current_thread);
987 if (mono_thread_attach_cb) {
991 mono_thread_get_stack_bounds (&staddr, &stsize);
994 mono_thread_attach_cb (tid, &tid);
996 mono_thread_attach_cb (tid, staddr + stsize);
999 // FIXME: Need a separate callback
1000 mono_profiler_thread_start (tid);
1002 return current_thread;
1006 mono_thread_detach (MonoThread *thread)
1008 g_return_if_fail (thread != NULL);
1010 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
1012 thread_cleanup (thread->internal_thread);
1014 SET_CURRENT_OBJECT (NULL);
1015 mono_domain_unset ();
1017 /* Don't need to CloseHandle this thread, even though we took a
1018 * reference in mono_thread_attach (), because the GC will do it
1019 * when the Thread object is finalised.
1026 MonoInternalThread *thread = mono_thread_internal_current ();
1028 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1030 thread_cleanup (thread);
1031 SET_CURRENT_OBJECT (NULL);
1032 mono_domain_unset ();
1034 /* we could add a callback here for embedders to use. */
1035 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1036 exit (mono_environment_exitcode_get ());
1041 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1043 MonoInternalThread *internal = create_internal_thread_object ();
1045 internal->state = ThreadState_Unstarted;
1046 internal->apartment_state = ThreadApartmentState_Unknown;
1047 internal->managed_id = get_next_managed_thread_id ();
1049 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1052 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
1055 guint32 (*start_func)(void *);
1056 struct StartInfo *start_info;
1059 MonoInternalThread *internal;
1061 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1063 if (!this->internal_thread)
1064 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1065 internal = this->internal_thread;
1067 ensure_synch_cs_set (internal);
1069 EnterCriticalSection (internal->synch_cs);
1071 if ((internal->state & ThreadState_Unstarted) == 0) {
1072 LeaveCriticalSection (internal->synch_cs);
1073 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1077 if ((internal->state & ThreadState_Aborted) != 0) {
1078 LeaveCriticalSection (internal->synch_cs);
1083 /* This is freed in start_wrapper */
1084 start_info = g_new0 (struct StartInfo, 1);
1085 start_info->func = start_func;
1086 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1087 start_info->delegate = start;
1088 start_info->obj = this;
1089 g_assert (this->obj.vtable->domain == mono_domain_get ());
1091 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1092 if (internal->start_notify==NULL) {
1093 LeaveCriticalSection (internal->synch_cs);
1094 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1095 g_free (start_info);
1099 mono_threads_lock ();
1100 register_thread_start_argument (this, start_info);
1101 if (threads_starting_up == NULL) {
1102 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1103 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1105 mono_g_hash_table_insert (threads_starting_up, this, this);
1106 mono_threads_unlock ();
1108 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1109 CREATE_SUSPENDED, &tid);
1111 LeaveCriticalSection (internal->synch_cs);
1112 mono_threads_lock ();
1113 mono_g_hash_table_remove (threads_starting_up, this);
1114 mono_threads_unlock ();
1115 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1119 internal->handle=thread;
1121 if (mono_gc_is_moving ()) {
1122 internal->thread_pinning_ref = internal;
1123 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
1127 /* Don't call handle_store() here, delay it to Start.
1128 * We can't join a thread (trying to will just block
1129 * forever) until it actually starts running, so don't
1130 * store the handle till then.
1133 mono_thread_start (this);
1135 internal->state &= ~ThreadState_Unstarted;
1137 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1139 LeaveCriticalSection (internal->synch_cs);
1144 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1146 MONO_ARCH_SAVE_REGS;
1148 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1151 CloseHandle (thread);
1153 if (this->synch_cs) {
1154 CRITICAL_SECTION *synch_cs = this->synch_cs;
1155 this->synch_cs = NULL;
1156 DeleteCriticalSection (synch_cs);
1161 void *name = this->name;
1167 static void mono_thread_start (MonoThread *thread)
1169 MonoInternalThread *internal = thread->internal_thread;
1171 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1173 /* Only store the handle when the thread is about to be
1174 * launched, to avoid the main thread deadlocking while trying
1175 * to clean up a thread that will never be signalled.
1177 if (!handle_store (thread, FALSE))
1180 ResumeThread (internal->handle);
1182 if(internal->start_notify!=NULL) {
1183 /* Wait for the thread to set up its TLS data etc, so
1184 * theres no potential race condition if someone tries
1185 * to look up the data believing the thread has
1189 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1191 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1192 CloseHandle (internal->start_notify);
1193 internal->start_notify = NULL;
1196 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1199 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1202 MonoInternalThread *thread = mono_thread_internal_current ();
1204 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1206 mono_thread_current_check_pending_interrupt ();
1209 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1211 res = SleepEx(ms,TRUE);
1213 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1215 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1216 MonoException* exc = mono_thread_execute_interruption (thread);
1218 mono_raise_exception (exc);
1230 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1235 ves_icall_System_Threading_Thread_GetDomainID (void)
1237 MONO_ARCH_SAVE_REGS;
1239 return mono_domain_get()->domain_id;
1243 ves_icall_System_Threading_Thread_Yield (void)
1246 return SwitchToThread ();
1248 return sched_yield () == 0;
1253 * mono_thread_get_name:
1255 * Return the name of the thread. NAME_LEN is set to the length of the name.
1256 * Return NULL if the thread has no name. The returned memory is owned by the
1260 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1264 ensure_synch_cs_set (this_obj);
1266 EnterCriticalSection (this_obj->synch_cs);
1268 if (!this_obj->name) {
1272 *name_len = this_obj->name_len;
1273 res = g_new (gunichar2, this_obj->name_len);
1274 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1277 LeaveCriticalSection (this_obj->synch_cs);
1283 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1287 ensure_synch_cs_set (this_obj);
1289 EnterCriticalSection (this_obj->synch_cs);
1291 if (!this_obj->name)
1294 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1296 LeaveCriticalSection (this_obj->synch_cs);
1302 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1304 ensure_synch_cs_set (this_obj);
1306 EnterCriticalSection (this_obj->synch_cs);
1308 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1309 LeaveCriticalSection (this_obj->synch_cs);
1311 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1315 this_obj->name = g_new (gunichar2, mono_string_length (name));
1316 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1317 this_obj->name_len = mono_string_length (name);
1320 this_obj->name = NULL;
1323 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1325 LeaveCriticalSection (this_obj->synch_cs);
1326 if (this_obj->name) {
1327 char *tname = mono_string_to_utf8 (name);
1328 mono_profiler_thread_name (this_obj->tid, tname);
1334 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1336 mono_thread_set_name_internal (this_obj, name, TRUE);
1339 /* If the array is already in the requested domain, we just return it,
1340 otherwise we return a copy in that domain. */
1342 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1349 if (mono_object_domain (arr) == domain)
1352 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1353 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1358 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1360 return byte_array_to_domain (arr, mono_get_root_domain ());
1364 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1366 return byte_array_to_domain (arr, mono_domain_get ());
1370 mono_thread_current (void)
1372 MonoDomain *domain = mono_domain_get ();
1373 MonoInternalThread *internal = mono_thread_internal_current ();
1374 MonoThread **current_thread_ptr;
1376 g_assert (internal);
1377 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1379 if (!*current_thread_ptr) {
1380 g_assert (domain != mono_get_root_domain ());
1381 *current_thread_ptr = new_thread_with_internal (domain, internal);
1383 return *current_thread_ptr;
1387 mono_thread_internal_current (void)
1389 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1390 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1394 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1395 int ms, HANDLE thread)
1397 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1400 mono_thread_current_check_pending_interrupt ();
1402 ensure_synch_cs_set (this);
1404 EnterCriticalSection (this->synch_cs);
1406 if ((this->state & ThreadState_Unstarted) != 0) {
1407 LeaveCriticalSection (this->synch_cs);
1409 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1413 LeaveCriticalSection (this->synch_cs);
1418 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1420 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1422 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1424 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1426 if(ret==WAIT_OBJECT_0) {
1427 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1432 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1438 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1446 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1449 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1451 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1453 if (ret != WAIT_IO_COMPLETION)
1456 exc = mono_thread_execute_interruption (thread);
1458 mono_raise_exception (exc);
1463 /* Re-calculate ms according to the time passed */
1464 diff_ms = (mono_100ns_ticks () - start) / 10000;
1465 if (diff_ms >= ms) {
1469 wait = ms - diff_ms;
1475 /* FIXME: exitContext isnt documented */
1476 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1482 MonoObject *waitHandle;
1483 MonoInternalThread *thread = mono_thread_internal_current ();
1485 /* Do this WaitSleepJoin check before creating objects */
1486 mono_thread_current_check_pending_interrupt ();
1488 numhandles = mono_array_length(mono_handles);
1489 handles = g_new0(HANDLE, numhandles);
1491 for(i = 0; i < numhandles; i++) {
1492 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1493 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1500 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1502 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1504 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1508 if(ret==WAIT_FAILED) {
1509 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1511 } else if(ret==WAIT_TIMEOUT) {
1512 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1519 /* FIXME: exitContext isnt documented */
1520 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1522 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1526 MonoObject *waitHandle;
1527 MonoInternalThread *thread = mono_thread_internal_current ();
1529 /* Do this WaitSleepJoin check before creating objects */
1530 mono_thread_current_check_pending_interrupt ();
1532 numhandles = mono_array_length(mono_handles);
1533 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1536 for(i = 0; i < numhandles; i++) {
1537 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1538 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1545 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1547 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1549 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1551 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1554 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1556 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1557 return ret - WAIT_OBJECT_0;
1559 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1560 return ret - WAIT_ABANDONED_0;
1567 /* FIXME: exitContext isnt documented */
1568 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1571 MonoInternalThread *thread = mono_thread_internal_current ();
1573 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1579 mono_thread_current_check_pending_interrupt ();
1581 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1583 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1585 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1587 if(ret==WAIT_FAILED) {
1588 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1590 } else if(ret==WAIT_TIMEOUT) {
1591 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1599 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1602 MonoInternalThread *thread = mono_thread_internal_current ();
1604 MONO_ARCH_SAVE_REGS;
1609 mono_thread_current_check_pending_interrupt ();
1611 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1613 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1615 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1617 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1620 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1624 MONO_ARCH_SAVE_REGS;
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 MONO_ARCH_SAVE_REGS;
1644 return(ReleaseMutex (handle));
1647 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1653 MONO_ARCH_SAVE_REGS;
1655 *error = ERROR_SUCCESS;
1657 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1659 *error = GetLastError ();
1666 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1670 MONO_ARCH_SAVE_REGS;
1675 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1677 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1678 mono_string_chars (name));
1680 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1688 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1692 MONO_ARCH_SAVE_REGS;
1694 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1699 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1703 MONO_ARCH_SAVE_REGS;
1705 *error = ERROR_SUCCESS;
1707 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1709 *error = GetLastError ();
1715 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1719 MONO_ARCH_SAVE_REGS;
1724 event = CreateEvent (NULL, manual, initial, NULL);
1726 event = CreateEvent (NULL, manual, initial,
1727 mono_string_chars (name));
1729 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1737 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1738 MONO_ARCH_SAVE_REGS;
1740 return (SetEvent(handle));
1743 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1744 MONO_ARCH_SAVE_REGS;
1746 return (ResetEvent(handle));
1750 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1751 MONO_ARCH_SAVE_REGS;
1753 CloseHandle (handle);
1756 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1762 MONO_ARCH_SAVE_REGS;
1764 *error = ERROR_SUCCESS;
1766 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1768 *error = GetLastError ();
1774 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1776 MONO_ARCH_SAVE_REGS;
1778 return InterlockedIncrement (location);
1781 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1785 MONO_ARCH_SAVE_REGS;
1787 mono_interlocked_lock ();
1791 mono_interlocked_unlock ();
1797 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1799 MONO_ARCH_SAVE_REGS;
1801 return InterlockedDecrement(location);
1804 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1808 MONO_ARCH_SAVE_REGS;
1810 mono_interlocked_lock ();
1814 mono_interlocked_unlock ();
1819 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1821 MONO_ARCH_SAVE_REGS;
1823 return InterlockedExchange(location, value);
1826 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1829 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1830 mono_gc_wbarrier_generic_nostore (location);
1834 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1836 return InterlockedExchangePointer(location, value);
1839 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1841 IntFloatUnion val, ret;
1843 MONO_ARCH_SAVE_REGS;
1846 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1852 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1854 #if SIZEOF_VOID_P == 8
1855 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1860 * According to MSDN, this function is only atomic with regards to the
1861 * other Interlocked functions on 32 bit platforms.
1863 mono_interlocked_lock ();
1866 mono_interlocked_unlock ();
1873 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1875 #if SIZEOF_VOID_P == 8
1876 LongDoubleUnion val, ret;
1879 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1886 * According to MSDN, this function is only atomic with regards to the
1887 * other Interlocked functions on 32 bit platforms.
1889 mono_interlocked_lock ();
1892 mono_interlocked_unlock ();
1898 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1900 MONO_ARCH_SAVE_REGS;
1902 return InterlockedCompareExchange(location, value, comparand);
1905 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1908 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1909 mono_gc_wbarrier_generic_nostore (location);
1913 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1915 return InterlockedCompareExchangePointer(location, value, comparand);
1918 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1920 IntFloatUnion val, ret, cmp;
1922 MONO_ARCH_SAVE_REGS;
1925 cmp.fval = comparand;
1926 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1932 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1934 #if SIZEOF_VOID_P == 8
1935 LongDoubleUnion val, comp, ret;
1938 comp.fval = comparand;
1939 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1945 mono_interlocked_lock ();
1947 if (old == comparand)
1949 mono_interlocked_unlock ();
1956 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1958 #if SIZEOF_VOID_P == 8
1959 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1963 mono_interlocked_lock ();
1965 if (old == comparand)
1967 mono_interlocked_unlock ();
1974 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1977 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1978 mono_gc_wbarrier_generic_nostore (location);
1983 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1986 res = InterlockedExchangePointer ((gpointer *)location, value);
1987 mono_gc_wbarrier_generic_nostore (location);
1992 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1994 #if SIZEOF_VOID_P == 8
1995 /* Should be implemented as a JIT intrinsic */
1996 mono_raise_exception (mono_get_exception_not_implemented (NULL));
2001 mono_interlocked_lock ();
2003 *location = orig + value;
2004 mono_interlocked_unlock ();
2006 return orig + value;
2011 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2013 #if SIZEOF_VOID_P == 8
2014 /* Should be implemented as a JIT intrinsic */
2015 mono_raise_exception (mono_get_exception_not_implemented (NULL));
2020 mono_interlocked_lock ();
2022 *location = orig + value;
2023 mono_interlocked_unlock ();
2025 return orig + value;
2030 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2032 #if SIZEOF_VOID_P == 8
2033 /* 64 bit reads are already atomic */
2038 mono_interlocked_lock ();
2040 mono_interlocked_unlock ();
2047 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2049 mono_threads_lock ();
2050 mono_threads_unlock ();
2054 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
2056 mono_thread_clr_state (this, state);
2058 if (state & ThreadState_Background) {
2059 /* If the thread changes the background mode, the main thread has to
2060 * be notified, since it has to rebuild the list of threads to
2063 SetEvent (background_change_event);
2068 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
2070 mono_thread_set_state (this, state);
2072 if (state & ThreadState_Background) {
2073 /* If the thread changes the background mode, the main thread has to
2074 * be notified, since it has to rebuild the list of threads to
2077 SetEvent (background_change_event);
2082 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2086 ensure_synch_cs_set (this);
2088 EnterCriticalSection (this->synch_cs);
2090 state = this->state;
2092 LeaveCriticalSection (this->synch_cs);
2097 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2099 MonoInternalThread *current;
2102 ensure_synch_cs_set (this);
2104 current = mono_thread_internal_current ();
2106 EnterCriticalSection (this->synch_cs);
2108 this->thread_interrupt_requested = TRUE;
2109 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2111 LeaveCriticalSection (this->synch_cs);
2114 abort_thread_internal (this, TRUE, FALSE);
2118 void mono_thread_current_check_pending_interrupt ()
2120 MonoInternalThread *thread = mono_thread_internal_current ();
2121 gboolean throw = FALSE;
2123 mono_debugger_check_interruption ();
2125 ensure_synch_cs_set (thread);
2127 EnterCriticalSection (thread->synch_cs);
2129 if (thread->thread_interrupt_requested) {
2131 thread->thread_interrupt_requested = FALSE;
2134 LeaveCriticalSection (thread->synch_cs);
2137 mono_raise_exception (mono_get_exception_thread_interrupted ());
2142 mono_thread_get_abort_signal (void)
2146 #elif defined(PLATFORM_ANDROID)
2148 #elif !defined (SIGRTMIN)
2153 #endif /* SIGUSR1 */
2155 static int abort_signum = -1;
2157 if (abort_signum != -1)
2158 return abort_signum;
2159 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2160 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2161 struct sigaction sinfo;
2162 sigaction (i, NULL, &sinfo);
2163 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2168 /* fallback to the old way */
2170 #endif /* HOST_WIN32 */
2174 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2176 MonoException* exc = mono_thread_request_interruption (FALSE);
2177 if (exc) mono_raise_exception (exc);
2179 #endif /* HOST_WIN32 */
2182 * signal_thread_state_change
2184 * Tells the thread that his state has changed and it has to enter the new
2185 * state as soon as possible.
2187 static void signal_thread_state_change (MonoInternalThread *thread)
2189 if (thread == mono_thread_internal_current ()) {
2190 /* Do it synchronously */
2191 MonoException *exc = mono_thread_request_interruption (FALSE);
2193 mono_raise_exception (exc);
2197 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2199 /* fixme: store the state somewhere */
2200 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2203 * This will cause waits to be broken.
2204 * It will also prevent the thread from entering a wait, so if the thread returns
2205 * from the wait before it receives the abort signal, it will just spin in the wait
2206 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2209 wapi_interrupt_thread (thread->handle);
2210 #endif /* HOST_WIN32 */
2214 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2216 ensure_synch_cs_set (thread);
2218 EnterCriticalSection (thread->synch_cs);
2220 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2221 (thread->state & ThreadState_StopRequested) != 0 ||
2222 (thread->state & ThreadState_Stopped) != 0)
2224 LeaveCriticalSection (thread->synch_cs);
2228 if ((thread->state & ThreadState_Unstarted) != 0) {
2229 thread->state |= ThreadState_Aborted;
2230 LeaveCriticalSection (thread->synch_cs);
2234 thread->state |= ThreadState_AbortRequested;
2235 if (thread->abort_state_handle)
2236 mono_gchandle_free (thread->abort_state_handle);
2238 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2239 g_assert (thread->abort_state_handle);
2241 thread->abort_state_handle = 0;
2243 thread->abort_exc = NULL;
2246 * abort_exc is set in mono_thread_execute_interruption(),
2247 * triggered by the call to signal_thread_state_change(),
2248 * below. There's a point between where we have
2249 * abort_state_handle set, but abort_exc NULL, but that's not
2253 LeaveCriticalSection (thread->synch_cs);
2255 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2257 /* During shutdown, we can't wait for other threads */
2259 /* Make sure the thread is awake */
2260 mono_thread_resume (thread);
2262 abort_thread_internal (thread, TRUE, TRUE);
2266 ves_icall_System_Threading_Thread_ResetAbort (void)
2268 MonoInternalThread *thread = mono_thread_internal_current ();
2269 gboolean was_aborting;
2271 ensure_synch_cs_set (thread);
2273 EnterCriticalSection (thread->synch_cs);
2274 was_aborting = thread->state & ThreadState_AbortRequested;
2275 thread->state &= ~ThreadState_AbortRequested;
2276 LeaveCriticalSection (thread->synch_cs);
2278 if (!was_aborting) {
2279 const char *msg = "Unable to reset abort because no abort was requested";
2280 mono_raise_exception (mono_get_exception_thread_state (msg));
2282 thread->abort_exc = NULL;
2283 if (thread->abort_state_handle) {
2284 mono_gchandle_free (thread->abort_state_handle);
2285 /* This is actually not necessary - the handle
2286 only counts if the exception is set */
2287 thread->abort_state_handle = 0;
2292 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2294 ensure_synch_cs_set (thread);
2296 EnterCriticalSection (thread->synch_cs);
2298 thread->state &= ~ThreadState_AbortRequested;
2300 if (thread->abort_exc) {
2301 thread->abort_exc = NULL;
2302 if (thread->abort_state_handle) {
2303 mono_gchandle_free (thread->abort_state_handle);
2304 /* This is actually not necessary - the handle
2305 only counts if the exception is set */
2306 thread->abort_state_handle = 0;
2310 LeaveCriticalSection (thread->synch_cs);
2314 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2316 MonoInternalThread *thread = this->internal_thread;
2317 MonoObject *state, *deserialized = NULL, *exc;
2320 if (!thread->abort_state_handle)
2323 state = mono_gchandle_get_target (thread->abort_state_handle);
2326 domain = mono_domain_get ();
2327 if (mono_object_domain (state) == domain)
2330 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2332 if (!deserialized) {
2333 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2335 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2336 mono_raise_exception (invalid_op_exc);
2339 return deserialized;
2343 mono_thread_suspend (MonoInternalThread *thread)
2345 ensure_synch_cs_set (thread);
2347 EnterCriticalSection (thread->synch_cs);
2349 if ((thread->state & ThreadState_Unstarted) != 0 ||
2350 (thread->state & ThreadState_Aborted) != 0 ||
2351 (thread->state & ThreadState_Stopped) != 0)
2353 LeaveCriticalSection (thread->synch_cs);
2357 if ((thread->state & ThreadState_Suspended) != 0 ||
2358 (thread->state & ThreadState_SuspendRequested) != 0 ||
2359 (thread->state & ThreadState_StopRequested) != 0)
2361 LeaveCriticalSection (thread->synch_cs);
2365 thread->state |= ThreadState_SuspendRequested;
2367 LeaveCriticalSection (thread->synch_cs);
2369 suspend_thread_internal (thread, FALSE);
2374 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2376 if (!mono_thread_suspend (thread))
2377 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2381 mono_thread_resume (MonoInternalThread *thread)
2383 ensure_synch_cs_set (thread);
2385 EnterCriticalSection (thread->synch_cs);
2387 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2388 thread->state &= ~ThreadState_SuspendRequested;
2389 LeaveCriticalSection (thread->synch_cs);
2393 if ((thread->state & ThreadState_Suspended) == 0 ||
2394 (thread->state & ThreadState_Unstarted) != 0 ||
2395 (thread->state & ThreadState_Aborted) != 0 ||
2396 (thread->state & ThreadState_Stopped) != 0)
2398 LeaveCriticalSection (thread->synch_cs);
2402 return resume_thread_internal (thread);
2406 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2408 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2409 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2413 mono_threads_is_critical_method (MonoMethod *method)
2415 switch (method->wrapper_type) {
2416 case MONO_WRAPPER_RUNTIME_INVOKE:
2417 case MONO_WRAPPER_XDOMAIN_INVOKE:
2418 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2425 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2430 if (mono_threads_is_critical_method (m)) {
2431 *((gboolean*)data) = TRUE;
2438 is_running_protected_wrapper (void)
2440 gboolean found = FALSE;
2441 mono_stack_walk (find_wrapper, &found);
2445 void mono_thread_internal_stop (MonoInternalThread *thread)
2447 ensure_synch_cs_set (thread);
2449 EnterCriticalSection (thread->synch_cs);
2451 if ((thread->state & ThreadState_StopRequested) != 0 ||
2452 (thread->state & ThreadState_Stopped) != 0)
2454 LeaveCriticalSection (thread->synch_cs);
2458 /* Make sure the thread is awake */
2459 mono_thread_resume (thread);
2461 thread->state |= ThreadState_StopRequested;
2462 thread->state &= ~ThreadState_AbortRequested;
2464 LeaveCriticalSection (thread->synch_cs);
2466 abort_thread_internal (thread, TRUE, TRUE);
2469 void mono_thread_stop (MonoThread *thread)
2471 mono_thread_internal_stop (thread->internal_thread);
2475 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2477 return *((volatile gint8 *) (ptr));
2481 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2483 return *((volatile gint16 *) (ptr));
2487 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2489 return *((volatile gint32 *) (ptr));
2493 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2495 return *((volatile gint64 *) (ptr));
2499 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2501 return (void *) *((volatile void **) ptr);
2505 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2507 return *((volatile double *) (ptr));
2511 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2513 return *((volatile float *) (ptr));
2517 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2519 return (MonoObject*)*((volatile MonoObject**)ptr);
2523 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2525 *((volatile gint8 *) ptr) = value;
2529 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2531 *((volatile gint16 *) ptr) = value;
2535 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2537 *((volatile gint32 *) ptr) = value;
2541 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2543 *((volatile gint64 *) ptr) = value;
2547 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2549 *((volatile void **) ptr) = value;
2553 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2555 mono_gc_wbarrier_generic_store (ptr, value);
2559 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2561 *((volatile double *) ptr) = value;
2565 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2567 *((volatile float *) ptr) = value;
2571 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2573 *((volatile MonoObject **) ptr) = value;
2574 mono_gc_wbarrier_generic_nostore (ptr);
2578 mono_thread_init_tls (void)
2580 MONO_FAST_TLS_INIT (tls_current_object);
2581 mono_native_tls_alloc (¤t_object_key, NULL);
2584 void mono_thread_init (MonoThreadStartCB start_cb,
2585 MonoThreadAttachCB attach_cb)
2587 InitializeCriticalSection(&threads_mutex);
2588 InitializeCriticalSection(&interlocked_mutex);
2589 InitializeCriticalSection(&contexts_mutex);
2591 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2592 g_assert(background_change_event != NULL);
2594 mono_init_static_data_info (&thread_static_info);
2595 mono_init_static_data_info (&context_static_info);
2597 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2599 mono_thread_start_cb = start_cb;
2600 mono_thread_attach_cb = attach_cb;
2602 /* Get a pseudo handle to the current process. This is just a
2603 * kludge so that wapi can build a process handle if needed.
2604 * As a pseudo handle is returned, we don't need to clean
2607 GetCurrentProcess ();
2610 void mono_thread_cleanup (void)
2612 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2613 /* The main thread must abandon any held mutexes (particularly
2614 * important for named mutexes as they are shared across
2615 * processes, see bug 74680.) This will happen when the
2616 * thread exits, but if it's not running in a subthread it
2617 * won't exit in time.
2619 /* Using non-w32 API is a nasty kludge, but I couldn't find
2620 * anything in the documentation that would let me do this
2621 * here yet still be safe to call on windows.
2623 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2627 /* This stuff needs more testing, it seems one of these
2628 * critical sections can be locked when mono_thread_cleanup is
2631 DeleteCriticalSection (&threads_mutex);
2632 DeleteCriticalSection (&interlocked_mutex);
2633 DeleteCriticalSection (&contexts_mutex);
2634 DeleteCriticalSection (&delayed_free_table_mutex);
2635 DeleteCriticalSection (&small_id_mutex);
2636 CloseHandle (background_change_event);
2639 mono_native_tls_free (current_object_key);
2643 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2645 mono_thread_cleanup_fn = func;
2649 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2651 thread->internal_thread->manage_callback = func;
2654 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2656 mono_thread_notify_pending_exc_fn = func;
2660 static void print_tids (gpointer key, gpointer value, gpointer user)
2662 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2663 * sizeof(uint) and a cast to uint would overflow
2665 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2666 * print this as a pointer.
2668 g_message ("Waiting for: %p", key);
2673 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2674 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2678 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2682 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2684 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2686 if(ret==WAIT_FAILED) {
2687 /* See the comment in build_wait_tids() */
2688 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2692 for(i=0; i<wait->num; i++)
2693 CloseHandle (wait->handles[i]);
2695 if (ret == WAIT_TIMEOUT)
2698 for(i=0; i<wait->num; i++) {
2699 gsize tid = wait->threads[i]->tid;
2701 mono_threads_lock ();
2702 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2703 /* This thread must have been killed, because
2704 * it hasn't cleaned itself up. (It's just
2705 * possible that the thread exited before the
2706 * parent thread had a chance to store the
2707 * handle, and now there is another pointer to
2708 * the already-exited thread stored. In this
2709 * case, we'll just get two
2710 * mono_profiler_thread_end() calls for the
2714 mono_threads_unlock ();
2715 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2716 thread_cleanup (wait->threads[i]);
2718 mono_threads_unlock ();
2723 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2725 guint32 i, ret, count;
2727 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2729 /* Add the thread state change event, so it wakes up if a thread changes
2730 * to background mode.
2733 if (count < MAXIMUM_WAIT_OBJECTS) {
2734 wait->handles [count] = background_change_event;
2738 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2740 if(ret==WAIT_FAILED) {
2741 /* See the comment in build_wait_tids() */
2742 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2746 for(i=0; i<wait->num; i++)
2747 CloseHandle (wait->handles[i]);
2749 if (ret == WAIT_TIMEOUT)
2752 if (ret < wait->num) {
2753 gsize tid = wait->threads[ret]->tid;
2754 mono_threads_lock ();
2755 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2756 /* See comment in wait_for_tids about thread cleanup */
2757 mono_threads_unlock ();
2758 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2759 thread_cleanup (wait->threads [ret]);
2761 mono_threads_unlock ();
2765 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2767 struct wait_data *wait=(struct wait_data *)user;
2769 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2771 MonoInternalThread *thread=(MonoInternalThread *)value;
2773 /* Ignore background threads, we abort them later */
2774 /* Do not lock here since it is not needed and the caller holds threads_lock */
2775 if (thread->state & ThreadState_Background) {
2776 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2777 return; /* just leave, ignore */
2780 if (mono_gc_is_finalizer_internal_thread (thread)) {
2781 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2785 if (thread == mono_thread_internal_current ()) {
2786 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2790 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2791 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2795 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2796 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2800 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2801 if (handle == NULL) {
2802 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2806 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2807 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2808 wait->handles[wait->num]=handle;
2809 wait->threads[wait->num]=thread;
2812 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2814 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2819 /* Just ignore the rest, we can't do anything with
2826 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2828 struct wait_data *wait=(struct wait_data *)user;
2829 gsize self = GetCurrentThreadId ();
2830 MonoInternalThread *thread = value;
2833 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2836 /* The finalizer thread is not a background thread */
2837 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2838 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2840 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2844 /* printf ("A: %d\n", wait->num); */
2845 wait->handles[wait->num]=thread->handle;
2846 wait->threads[wait->num]=thread;
2849 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2850 mono_thread_internal_stop (thread);
2854 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2858 * mono_threads_set_shutting_down:
2860 * Is called by a thread that wants to shut down Mono. If the runtime is already
2861 * shutting down, the calling thread is suspended/stopped, and this function never
2865 mono_threads_set_shutting_down (void)
2867 MonoInternalThread *current_thread = mono_thread_internal_current ();
2869 mono_threads_lock ();
2871 if (shutting_down) {
2872 mono_threads_unlock ();
2874 /* Make sure we're properly suspended/stopped */
2876 EnterCriticalSection (current_thread->synch_cs);
2878 if ((current_thread->state & ThreadState_SuspendRequested) ||
2879 (current_thread->state & ThreadState_AbortRequested) ||
2880 (current_thread->state & ThreadState_StopRequested)) {
2881 LeaveCriticalSection (current_thread->synch_cs);
2882 mono_thread_execute_interruption (current_thread);
2884 current_thread->state |= ThreadState_Stopped;
2885 LeaveCriticalSection (current_thread->synch_cs);
2888 /*since we're killing the thread, unset the current domain.*/
2889 mono_domain_unset ();
2891 /* Wake up other threads potentially waiting for us */
2894 shutting_down = TRUE;
2896 /* Not really a background state change, but this will
2897 * interrupt the main thread if it is waiting for all
2898 * the other threads.
2900 SetEvent (background_change_event);
2902 mono_threads_unlock ();
2906 void mono_thread_manage (void)
2908 struct wait_data wait_data;
2909 struct wait_data *wait = &wait_data;
2911 memset (wait, 0, sizeof (struct wait_data));
2912 /* join each thread that's still running */
2913 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2915 mono_threads_lock ();
2917 THREAD_DEBUG (g_message("%s: No threads", __func__));
2918 mono_threads_unlock ();
2921 mono_threads_unlock ();
2924 mono_threads_lock ();
2925 if (shutting_down) {
2926 /* somebody else is shutting down */
2927 mono_threads_unlock ();
2930 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2931 mono_g_hash_table_foreach (threads, print_tids, NULL));
2933 ResetEvent (background_change_event);
2935 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2936 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2937 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2938 mono_threads_unlock ();
2940 /* Something to wait for */
2941 wait_for_tids_or_state_change (wait, INFINITE);
2943 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2944 } while(wait->num>0);
2946 /* Mono is shutting down, so just wait for the end */
2947 if (!mono_runtime_try_shutdown ()) {
2948 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2949 mono_thread_suspend (mono_thread_internal_current ());
2950 mono_thread_execute_interruption (mono_thread_internal_current ());
2954 * Remove everything but the finalizer thread and self.
2955 * Also abort all the background threads
2958 mono_threads_lock ();
2961 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2962 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2963 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2965 mono_threads_unlock ();
2967 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2969 /* Something to wait for */
2970 wait_for_tids (wait, INFINITE);
2972 } while (wait->num > 0);
2975 * give the subthreads a chance to really quit (this is mainly needed
2976 * to get correct user and system times from getrusage/wait/time(1)).
2977 * This could be removed if we avoid pthread_detach() and use pthread_join().
2984 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2986 MonoInternalThread *thread=(MonoInternalThread *)value;
2988 if(thread->tid != (gsize)user) {
2989 /*TerminateThread (thread->handle, -1);*/
2993 void mono_thread_abort_all_other_threads (void)
2995 gsize self = GetCurrentThreadId ();
2997 mono_threads_lock ();
2998 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2999 mono_g_hash_table_size (threads));
3000 mono_g_hash_table_foreach (threads, print_tids, NULL));
3002 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3004 mono_threads_unlock ();
3008 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3010 MonoInternalThread *thread = (MonoInternalThread*)value;
3011 struct wait_data *wait = (struct wait_data*)user_data;
3015 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3017 * This needs no locking.
3019 if ((thread->state & ThreadState_Suspended) != 0 ||
3020 (thread->state & ThreadState_Stopped) != 0)
3023 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3024 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3028 wait->handles [wait->num] = handle;
3029 wait->threads [wait->num] = thread;
3035 * mono_thread_suspend_all_other_threads:
3037 * Suspend all managed threads except the finalizer thread and this thread. It is
3038 * not possible to resume them later.
3040 void mono_thread_suspend_all_other_threads (void)
3042 struct wait_data wait_data;
3043 struct wait_data *wait = &wait_data;
3045 gsize self = GetCurrentThreadId ();
3047 guint32 eventidx = 0;
3048 gboolean starting, finished;
3050 memset (wait, 0, sizeof (struct wait_data));
3052 * The other threads could be in an arbitrary state at this point, i.e.
3053 * they could be starting up, shutting down etc. This means that there could be
3054 * threads which are not even in the threads hash table yet.
3058 * First we set a barrier which will be checked by all threads before they
3059 * are added to the threads hash table, and they will exit if the flag is set.
3060 * This ensures that no threads could be added to the hash later.
3061 * We will use shutting_down as the barrier for now.
3063 g_assert (shutting_down);
3066 * We make multiple calls to WaitForMultipleObjects since:
3067 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3068 * - some threads could exit without becoming suspended
3073 * Make a copy of the hashtable since we can't do anything with
3074 * threads while threads_mutex is held.
3077 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3078 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3079 mono_threads_lock ();
3080 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3081 mono_threads_unlock ();
3083 events = g_new0 (gpointer, wait->num);
3085 /* Get the suspended events that we'll be waiting for */
3086 for (i = 0; i < wait->num; ++i) {
3087 MonoInternalThread *thread = wait->threads [i];
3088 gboolean signal_suspend = FALSE;
3090 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3091 //CloseHandle (wait->handles [i]);
3092 wait->threads [i] = NULL; /* ignore this thread in next loop */
3096 ensure_synch_cs_set (thread);
3098 EnterCriticalSection (thread->synch_cs);
3100 if (thread->suspended_event == NULL) {
3101 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3102 if (thread->suspended_event == NULL) {
3103 /* Forget this one and go on to the next */
3104 LeaveCriticalSection (thread->synch_cs);
3109 if ((thread->state & ThreadState_Suspended) != 0 ||
3110 (thread->state & ThreadState_StopRequested) != 0 ||
3111 (thread->state & ThreadState_Stopped) != 0) {
3112 LeaveCriticalSection (thread->synch_cs);
3113 CloseHandle (wait->handles [i]);
3114 wait->threads [i] = NULL; /* ignore this thread in next loop */
3118 if ((thread->state & ThreadState_SuspendRequested) == 0)
3119 signal_suspend = TRUE;
3121 events [eventidx++] = thread->suspended_event;
3123 /* Convert abort requests into suspend requests */
3124 if ((thread->state & ThreadState_AbortRequested) != 0)
3125 thread->state &= ~ThreadState_AbortRequested;
3127 thread->state |= ThreadState_SuspendRequested;
3129 LeaveCriticalSection (thread->synch_cs);
3131 /* Signal the thread to suspend */
3132 if (mono_thread_info_new_interrupt_enabled ())
3133 suspend_thread_internal (thread, TRUE);
3134 else if (signal_suspend)
3135 signal_thread_state_change (thread);
3138 /*Only wait on the suspend event if we are using the old path */
3139 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3140 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3141 for (i = 0; i < wait->num; ++i) {
3142 MonoInternalThread *thread = wait->threads [i];
3147 ensure_synch_cs_set (thread);
3149 EnterCriticalSection (thread->synch_cs);
3150 if ((thread->state & ThreadState_Suspended) != 0) {
3151 CloseHandle (thread->suspended_event);
3152 thread->suspended_event = NULL;
3154 LeaveCriticalSection (thread->synch_cs);
3158 if (eventidx <= 0) {
3160 * If there are threads which are starting up, we wait until they
3161 * are suspended when they try to register in the threads hash.
3162 * This is guaranteed to finish, since the threads which can create new
3163 * threads get suspended after a while.
3164 * FIXME: The finalizer thread can still create new threads.
3166 mono_threads_lock ();
3167 if (threads_starting_up)
3168 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3171 mono_threads_unlock ();
3183 collect_threads (gpointer key, gpointer value, gpointer user_data)
3185 MonoInternalThread *thread = (MonoInternalThread*)value;
3186 struct wait_data *wait = (struct wait_data*)user_data;
3189 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3190 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3194 wait->handles [wait->num] = handle;
3195 wait->threads [wait->num] = thread;
3200 static gboolean thread_dump_requested;
3202 static G_GNUC_UNUSED gboolean
3203 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3205 GString *p = (GString*)data;
3206 MonoMethod *method = NULL;
3208 method = frame->ji->method;
3211 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3212 g_string_append_printf (p, " %s\n", location);
3215 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3221 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3223 GString* text = g_string_new (0);
3225 GError *error = NULL;
3228 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3230 g_string_append_printf (text, "\n\"%s\"", name);
3233 else if (thread->threadpool_thread)
3234 g_string_append (text, "\n\"<threadpool thread>\"");
3236 g_string_append (text, "\n\"<unnamed thread>\"");
3239 /* This no longer works with remote unwinding */
3241 wapi_desc = wapi_current_thread_desc ();
3242 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3247 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3248 mono_thread_info_resume (mono_thread_info_get_tid (info));
3250 fprintf (stdout, "%s", text->str);
3252 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3253 OutputDebugStringA(text->str);
3256 g_string_free (text, TRUE);
3261 dump_thread (gpointer key, gpointer value, gpointer user)
3263 MonoInternalThread *thread = (MonoInternalThread *)value;
3264 MonoThreadInfo *info;
3266 if (thread == mono_thread_internal_current ())
3270 FIXME This still can hang if we stop a thread during malloc.
3271 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3272 that takes a callback and runs it with the target suspended.
3273 We probably should loop a bit around trying to get it to either managed code
3276 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3281 print_thread_dump (thread, info);
3285 mono_threads_perform_thread_dump (void)
3287 if (!thread_dump_requested)
3290 printf ("Full thread dump:\n");
3293 * Make a copy of the hashtable since we can't do anything with
3294 * threads while threads_mutex is held.
3296 mono_threads_lock ();
3297 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3298 mono_threads_unlock ();
3300 thread_dump_requested = FALSE;
3304 * mono_threads_request_thread_dump:
3306 * Ask all threads except the current to print their stacktrace to stdout.
3309 mono_threads_request_thread_dump (void)
3311 struct wait_data wait_data;
3312 struct wait_data *wait = &wait_data;
3315 /*The new thread dump code runs out of the finalizer thread. */
3316 if (mono_thread_info_new_interrupt_enabled ()) {
3317 thread_dump_requested = TRUE;
3318 mono_gc_finalize_notify ();
3323 memset (wait, 0, sizeof (struct wait_data));
3326 * Make a copy of the hashtable since we can't do anything with
3327 * threads while threads_mutex is held.
3329 mono_threads_lock ();
3330 mono_g_hash_table_foreach (threads, collect_threads, wait);
3331 mono_threads_unlock ();
3333 for (i = 0; i < wait->num; ++i) {
3334 MonoInternalThread *thread = wait->threads [i];
3336 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3337 (thread != mono_thread_internal_current ()) &&
3338 !thread->thread_dump_requested) {
3339 thread->thread_dump_requested = TRUE;
3341 signal_thread_state_change (thread);
3344 CloseHandle (wait->handles [i]);
3350 gint allocated; /* +1 so that refs [allocated] == NULL */
3354 typedef struct ref_stack RefStack;
3357 ref_stack_new (gint initial_size)
3361 initial_size = MAX (initial_size, 16) + 1;
3362 rs = g_new0 (RefStack, 1);
3363 rs->refs = g_new0 (gpointer, initial_size);
3364 rs->allocated = initial_size;
3369 ref_stack_destroy (gpointer ptr)
3380 ref_stack_push (RefStack *rs, gpointer ptr)
3382 g_assert (rs != NULL);
3384 if (rs->bottom >= rs->allocated) {
3385 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3386 rs->allocated <<= 1;
3387 rs->refs [rs->allocated] = NULL;
3389 rs->refs [rs->bottom++] = ptr;
3393 ref_stack_pop (RefStack *rs)
3395 if (rs == NULL || rs->bottom == 0)
3399 rs->refs [rs->bottom] = NULL;
3403 ref_stack_find (RefStack *rs, gpointer ptr)
3410 for (refs = rs->refs; refs && *refs; refs++) {
3418 * mono_thread_push_appdomain_ref:
3420 * Register that the current thread may have references to objects in domain
3421 * @domain on its stack. Each call to this function should be paired with a
3422 * call to pop_appdomain_ref.
3425 mono_thread_push_appdomain_ref (MonoDomain *domain)
3427 MonoInternalThread *thread = mono_thread_internal_current ();
3430 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3431 SPIN_LOCK (thread->lock_thread_id);
3432 if (thread->appdomain_refs == NULL)
3433 thread->appdomain_refs = ref_stack_new (16);
3434 ref_stack_push (thread->appdomain_refs, domain);
3435 SPIN_UNLOCK (thread->lock_thread_id);
3440 mono_thread_pop_appdomain_ref (void)
3442 MonoInternalThread *thread = mono_thread_internal_current ();
3445 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3446 SPIN_LOCK (thread->lock_thread_id);
3447 ref_stack_pop (thread->appdomain_refs);
3448 SPIN_UNLOCK (thread->lock_thread_id);
3453 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3456 SPIN_LOCK (thread->lock_thread_id);
3457 res = ref_stack_find (thread->appdomain_refs, domain);
3458 SPIN_UNLOCK (thread->lock_thread_id);
3463 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3465 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3468 typedef struct abort_appdomain_data {
3469 struct wait_data wait;
3471 } abort_appdomain_data;
3474 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3476 MonoInternalThread *thread = (MonoInternalThread*)value;
3477 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3478 MonoDomain *domain = data->domain;
3480 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3481 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3483 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3484 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3487 data->wait.handles [data->wait.num] = handle;
3488 data->wait.threads [data->wait.num] = thread;
3491 /* Just ignore the rest, we can't do anything with
3499 * mono_threads_abort_appdomain_threads:
3501 * Abort threads which has references to the given appdomain.
3504 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3506 #ifdef __native_client__
3510 abort_appdomain_data user_data;
3512 int orig_timeout = timeout;
3515 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3517 start_time = mono_msec_ticks ();
3519 mono_threads_lock ();
3521 user_data.domain = domain;
3522 user_data.wait.num = 0;
3523 /* This shouldn't take any locks */
3524 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3525 mono_threads_unlock ();
3527 if (user_data.wait.num > 0) {
3528 /* Abort the threads outside the threads lock */
3529 for (i = 0; i < user_data.wait.num; ++i)
3530 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3533 * We should wait for the threads either to abort, or to leave the
3534 * domain. We can't do the latter, so we wait with a timeout.
3536 wait_for_tids (&user_data.wait, 100);
3539 /* Update remaining time */
3540 timeout -= mono_msec_ticks () - start_time;
3541 start_time = mono_msec_ticks ();
3543 if (orig_timeout != -1 && timeout < 0)
3546 while (user_data.wait.num > 0);
3548 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3554 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3556 MonoInternalThread *thread = (MonoInternalThread*)value;
3557 MonoDomain *domain = (MonoDomain*)user_data;
3560 /* No locking needed here */
3561 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3563 if (thread->cached_culture_info) {
3564 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3565 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3566 if (obj && obj->vtable->domain == domain)
3567 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3573 * mono_threads_clear_cached_culture:
3575 * Clear the cached_current_culture from all threads if it is in the
3579 mono_threads_clear_cached_culture (MonoDomain *domain)
3581 mono_threads_lock ();
3582 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3583 mono_threads_unlock ();
3587 * mono_thread_get_undeniable_exception:
3589 * Return an exception which needs to be raised when leaving a catch clause.
3590 * This is used for undeniable exception propagation.
3593 mono_thread_get_undeniable_exception (void)
3595 MonoInternalThread *thread = mono_thread_internal_current ();
3597 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3599 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3600 * exception if the thread no longer references a dying appdomain.
3602 thread->abort_exc->trace_ips = NULL;
3603 thread->abort_exc->stack_trace = NULL;
3604 return thread->abort_exc;
3610 #if MONO_SMALL_CONFIG
3611 #define NUM_STATIC_DATA_IDX 4
3612 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3616 #define NUM_STATIC_DATA_IDX 8
3617 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3618 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3622 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3625 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3628 gpointer *static_data = addr;
3629 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3632 if (!static_data [i])
3634 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3635 ptr = static_data [i];
3636 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3637 uintptr_t bmap = static_reference_bitmaps [i][j];
3640 if ((bmap & 1) && *p) {
3651 * mono_alloc_static_data
3653 * Allocate memory blocks for storing threads or context static data
3656 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3658 guint idx = (offset >> 24) - 1;
3661 gpointer* static_data = *static_data_ptr;
3663 static void* tls_desc = NULL;
3664 if (mono_gc_user_markers_supported () && !tls_desc)
3665 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3666 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3667 *static_data_ptr = static_data;
3668 static_data [0] = static_data;
3671 for (i = 1; i <= idx; ++i) {
3672 if (static_data [i])
3674 if (mono_gc_user_markers_supported () && threadlocal)
3675 static_data [i] = g_malloc0 (static_data_size [i]);
3677 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3682 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3685 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3686 if (!static_data [i])
3688 if (mono_gc_user_markers_supported () && threadlocal)
3689 g_free (static_data [i]);
3691 mono_gc_free_fixed (static_data [i]);
3693 mono_gc_free_fixed (static_data);
3697 * mono_init_static_data_info
3699 * Initializes static data counters
3701 static void mono_init_static_data_info (StaticDataInfo *static_data)
3703 static_data->idx = 0;
3704 static_data->offset = 0;
3705 static_data->freelist = NULL;
3709 * mono_alloc_static_data_slot
3711 * Generates an offset for static data. static_data contains the counters
3712 * used to generate it.
3715 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3719 if (!static_data->idx && !static_data->offset) {
3721 * we use the first chunk of the first allocation also as
3722 * an array for the rest of the data
3724 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3726 static_data->offset += align - 1;
3727 static_data->offset &= ~(align - 1);
3728 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3729 static_data->idx ++;
3730 g_assert (size <= static_data_size [static_data->idx]);
3731 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3732 static_data->offset = 0;
3734 offset = static_data->offset | ((static_data->idx + 1) << 24);
3735 static_data->offset += size;
3740 * ensure thread static fields already allocated are valid for thread
3741 * This function is called when a thread is created or on thread attach.
3744 thread_adjust_static_data (MonoInternalThread *thread)
3748 mono_threads_lock ();
3749 if (thread_static_info.offset || thread_static_info.idx > 0) {
3750 /* get the current allocated size */
3751 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3752 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3754 mono_threads_unlock ();
3758 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3760 MonoInternalThread *thread = value;
3761 guint32 offset = GPOINTER_TO_UINT (user);
3763 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3766 static MonoThreadDomainTls*
3767 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3769 MonoThreadDomainTls* prev = NULL;
3770 MonoThreadDomainTls* tmp = static_data->freelist;
3772 if (tmp->size == size) {
3774 prev->next = tmp->next;
3776 static_data->freelist = tmp->next;
3785 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3788 int idx = (offset >> 24) - 1;
3790 if (!static_reference_bitmaps [idx])
3791 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3792 rb = static_reference_bitmaps [idx];
3794 offset /= sizeof (gpointer);
3795 /* offset is now the bitmap offset */
3796 for (i = 0; i < numbits; ++i) {
3797 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3798 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3803 clear_reference_bitmap (guint32 offset, guint32 size)
3805 int idx = (offset >> 24) - 1;
3807 rb = static_reference_bitmaps [idx];
3809 offset /= sizeof (gpointer);
3810 size /= sizeof (gpointer);
3812 /* offset is now the bitmap offset */
3813 for (; offset < size; ++offset)
3814 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3818 * The offset for a special static variable is composed of three parts:
3819 * a bit that indicates the type of static data (0:thread, 1:context),
3820 * an index in the array of chunks of memory for the thread (thread->static_data)
3821 * and an offset in that chunk of mem. This allows allocating less memory in the
3826 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3829 if (static_type == SPECIAL_STATIC_THREAD) {
3830 MonoThreadDomainTls *item;
3831 mono_threads_lock ();
3832 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3833 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3835 offset = item->offset;
3838 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3840 update_tls_reference_bitmap (offset, bitmap, numbits);
3841 /* This can be called during startup */
3842 if (threads != NULL)
3843 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3844 mono_threads_unlock ();
3846 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3847 mono_contexts_lock ();
3848 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3849 mono_contexts_unlock ();
3850 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3856 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3858 /* The high bit means either thread (0) or static (1) data. */
3860 guint32 static_type = (offset & 0x80000000);
3863 offset &= 0x7fffffff;
3864 idx = (offset >> 24) - 1;
3866 if (static_type == 0) {
3867 return get_thread_static_data (thread, offset);
3869 /* Allocate static data block under demand, since we don't have a list
3872 MonoAppContext *context = mono_context_get ();
3873 if (!context->static_data || !context->static_data [idx]) {
3874 mono_contexts_lock ();
3875 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3876 mono_contexts_unlock ();
3878 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3883 mono_get_special_static_data (guint32 offset)
3885 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3894 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3896 MonoInternalThread *thread = value;
3897 TlsOffsetSize *data = user;
3898 int idx = (data->offset >> 24) - 1;
3901 if (!thread->static_data || !thread->static_data [idx])
3903 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3904 mono_gc_bzero (ptr, data->size);
3908 do_free_special_slot (guint32 offset, guint32 size)
3910 guint32 static_type = (offset & 0x80000000);
3911 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3912 if (static_type == 0) {
3914 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3915 data.offset = offset & 0x7fffffff;
3917 clear_reference_bitmap (data.offset, data.size);
3918 if (threads != NULL)
3919 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3920 item->offset = offset;
3923 if (!mono_runtime_is_shutting_down ()) {
3924 item->next = thread_static_info.freelist;
3925 thread_static_info.freelist = item;
3927 /* We could be called during shutdown after mono_thread_cleanup () is called */
3931 /* FIXME: free context static data as well */
3936 do_free_special (gpointer key, gpointer value, gpointer data)
3938 MonoClassField *field = key;
3939 guint32 offset = GPOINTER_TO_UINT (value);
3942 size = mono_type_size (field->type, &align);
3943 do_free_special_slot (offset, size);
3947 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3949 mono_threads_lock ();
3950 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3951 mono_threads_unlock ();
3955 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3957 mono_threads_lock ();
3958 do_free_special_slot (offset, size);
3959 mono_threads_unlock ();
3963 * allocates room in the thread local area for storing an instance of the struct type
3964 * the allocation is kept track of in domain->tlsrec_list.
3967 mono_thread_alloc_tls (MonoReflectionType *type)
3969 MonoDomain *domain = mono_domain_get ();
3971 MonoTlsDataRecord *tlsrec;
3974 gsize default_bitmap [4] = {0};
3975 uint32_t tls_offset;
3979 klass = mono_class_from_mono_type (type->type);
3980 /* TlsDatum is a struct, so we subtract the object header size offset */
3981 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3982 size = mono_type_size (type->type, &align);
3983 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3984 if (bitmap != default_bitmap)
3986 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3987 tlsrec->tls_offset = tls_offset;
3988 tlsrec->size = size;
3989 mono_domain_lock (domain);
3990 tlsrec->next = domain->tlsrec_list;
3991 domain->tlsrec_list = tlsrec;
3992 mono_domain_unlock (domain);
3997 mono_thread_destroy_tls (uint32_t tls_offset)
3999 MonoTlsDataRecord *prev = NULL;
4000 MonoTlsDataRecord *cur;
4002 MonoDomain *domain = mono_domain_get ();
4003 mono_domain_lock (domain);
4004 cur = domain->tlsrec_list;
4006 if (cur->tls_offset == tls_offset) {
4008 prev->next = cur->next;
4010 domain->tlsrec_list = cur->next;
4018 mono_domain_unlock (domain);
4020 mono_special_static_data_free_slot (tls_offset, size);
4024 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4027 mono_thread_destroy_domain_tls (MonoDomain *domain)
4029 while (domain->tlsrec_list)
4030 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
4033 static MonoClassField *local_slots = NULL;
4036 /* local tls data to get locals_slot from a thread */
4039 /* index in the locals_slot array */
4044 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4046 LocalSlotID *sid = user_data;
4047 MonoInternalThread *thread = (MonoInternalThread*)value;
4048 MonoArray *slots_array;
4050 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4051 * it is for the right domain, so we need to check if it is allocated an initialized
4052 * for the current thread.
4054 /*g_print ("handling thread %p\n", thread);*/
4055 if (!thread->static_data || !thread->static_data [sid->idx])
4057 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4058 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4060 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4064 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4072 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4074 g_warning ("local_slots field not found in Thread class");
4078 domain = mono_domain_get ();
4079 mono_domain_lock (domain);
4080 if (domain->special_static_fields)
4081 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4082 mono_domain_unlock (domain);
4085 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4086 sid.offset = GPOINTER_TO_UINT (addr);
4087 sid.offset &= 0x7fffffff;
4088 sid.idx = (sid.offset >> 24) - 1;
4089 mono_threads_lock ();
4090 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4091 mono_threads_unlock ();
4093 /* FIXME: clear the slot for MonoAppContexts, too */
4098 static void CALLBACK dummy_apc (ULONG_PTR param)
4102 static guint32 dummy_apc (gpointer param)
4109 * mono_thread_execute_interruption
4111 * Performs the operation that the requested thread state requires (abort,
4114 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4116 ensure_synch_cs_set (thread);
4118 EnterCriticalSection (thread->synch_cs);
4120 /* MonoThread::interruption_requested can only be changed with atomics */
4121 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4122 /* this will consume pending APC calls */
4123 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4124 InterlockedDecrement (&thread_interruption_requested);
4126 /* Clear the interrupted flag of the thread so it can wait again */
4127 wapi_clear_interruption ();
4131 if ((thread->state & ThreadState_AbortRequested) != 0) {
4132 LeaveCriticalSection (thread->synch_cs);
4133 if (thread->abort_exc == NULL) {
4135 * This might be racy, but it has to be called outside the lock
4136 * since it calls managed code.
4138 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4140 return thread->abort_exc;
4142 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4143 self_suspend_internal (thread);
4146 else if ((thread->state & ThreadState_StopRequested) != 0) {
4147 /* FIXME: do this through the JIT? */
4149 LeaveCriticalSection (thread->synch_cs);
4151 mono_thread_exit ();
4153 } else if (thread->pending_exception) {
4156 exc = thread->pending_exception;
4157 thread->pending_exception = NULL;
4159 LeaveCriticalSection (thread->synch_cs);
4161 } else if (thread->thread_interrupt_requested) {
4163 thread->thread_interrupt_requested = FALSE;
4164 LeaveCriticalSection (thread->synch_cs);
4166 return(mono_get_exception_thread_interrupted ());
4169 LeaveCriticalSection (thread->synch_cs);
4175 * mono_thread_request_interruption
4177 * A signal handler can call this method to request the interruption of a
4178 * thread. The result of the interruption will depend on the current state of
4179 * the thread. If the result is an exception that needs to be throw, it is
4180 * provided as return value.
4183 mono_thread_request_interruption (gboolean running_managed)
4185 MonoInternalThread *thread = mono_thread_internal_current ();
4187 /* The thread may already be stopping */
4192 if (thread->interrupt_on_stop &&
4193 thread->state & ThreadState_StopRequested &&
4194 thread->state & ThreadState_Background)
4198 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4200 InterlockedIncrement (&thread_interruption_requested);
4202 if (!running_managed || is_running_protected_wrapper ()) {
4203 /* Can't stop while in unmanaged code. Increase the global interruption
4204 request count. When exiting the unmanaged method the count will be
4205 checked and the thread will be interrupted. */
4208 if (mono_thread_notify_pending_exc_fn && !running_managed)
4209 /* The JIT will notify the thread about the interruption */
4210 /* This shouldn't take any locks */
4211 mono_thread_notify_pending_exc_fn ();
4213 /* this will awake the thread if it is in WaitForSingleObject
4215 /* Our implementation of this function ignores the func argument */
4216 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4220 return mono_thread_execute_interruption (thread);
4224 /*This function should be called by a thread after it has exited all of
4225 * its handle blocks at interruption time.*/
4227 mono_thread_resume_interruption (void)
4229 MonoInternalThread *thread = mono_thread_internal_current ();
4230 gboolean still_aborting;
4232 /* The thread may already be stopping */
4236 ensure_synch_cs_set (thread);
4237 EnterCriticalSection (thread->synch_cs);
4238 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4239 LeaveCriticalSection (thread->synch_cs);
4241 /*This can happen if the protected block called Thread::ResetAbort*/
4242 if (!still_aborting)
4245 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4247 InterlockedIncrement (&thread_interruption_requested);
4250 wapi_self_interrupt ();
4252 return mono_thread_execute_interruption (thread);
4255 gboolean mono_thread_interruption_requested ()
4257 if (thread_interruption_requested) {
4258 MonoInternalThread *thread = mono_thread_internal_current ();
4259 /* The thread may already be stopping */
4261 return (thread->interruption_requested);
4266 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4268 MonoInternalThread *thread = mono_thread_internal_current ();
4270 /* The thread may already be stopping */
4274 mono_debugger_check_interruption ();
4276 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4277 MonoException* exc = mono_thread_execute_interruption (thread);
4278 if (exc) mono_raise_exception (exc);
4283 * Performs the interruption of the current thread, if one has been requested,
4284 * and the thread is not running a protected wrapper.
4286 void mono_thread_interruption_checkpoint ()
4288 mono_thread_interruption_checkpoint_request (FALSE);
4292 * Performs the interruption of the current thread, if one has been requested.
4294 void mono_thread_force_interruption_checkpoint ()
4296 mono_thread_interruption_checkpoint_request (TRUE);
4300 * mono_thread_get_and_clear_pending_exception:
4302 * Return any pending exceptions for the current thread and clear it as a side effect.
4305 mono_thread_get_and_clear_pending_exception (void)
4307 MonoInternalThread *thread = mono_thread_internal_current ();
4309 /* The thread may already be stopping */
4313 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4314 return mono_thread_execute_interruption (thread);
4317 if (thread->pending_exception) {
4318 MonoException *exc = thread->pending_exception;
4320 thread->pending_exception = NULL;
4328 * mono_set_pending_exception:
4330 * Set the pending exception of the current thread to EXC.
4331 * The exception will be thrown when execution returns to managed code.
4334 mono_set_pending_exception (MonoException *exc)
4336 MonoInternalThread *thread = mono_thread_internal_current ();
4338 /* The thread may already be stopping */
4342 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4344 mono_thread_request_interruption (FALSE);
4348 * mono_thread_interruption_request_flag:
4350 * Returns the address of a flag that will be non-zero if an interruption has
4351 * been requested for a thread. The thread to interrupt may not be the current
4352 * thread, so an additional call to mono_thread_interruption_requested() or
4353 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4356 gint32* mono_thread_interruption_request_flag ()
4358 return &thread_interruption_requested;
4362 mono_thread_init_apartment_state (void)
4365 MonoInternalThread* thread = mono_thread_internal_current ();
4367 /* Positive return value indicates success, either
4368 * S_OK if this is first CoInitialize call, or
4369 * S_FALSE if CoInitialize already called, but with same
4370 * threading model. A negative value indicates failure,
4371 * probably due to trying to change the threading model.
4373 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4374 ? COINIT_APARTMENTTHREADED
4375 : COINIT_MULTITHREADED) < 0) {
4376 thread->apartment_state = ThreadApartmentState_Unknown;
4382 mono_thread_cleanup_apartment_state (void)
4385 MonoInternalThread* thread = mono_thread_internal_current ();
4387 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4394 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4396 ensure_synch_cs_set (thread);
4398 EnterCriticalSection (thread->synch_cs);
4399 thread->state |= state;
4400 LeaveCriticalSection (thread->synch_cs);
4404 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4406 ensure_synch_cs_set (thread);
4408 EnterCriticalSection (thread->synch_cs);
4409 thread->state &= ~state;
4410 LeaveCriticalSection (thread->synch_cs);
4414 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4416 gboolean ret = FALSE;
4418 ensure_synch_cs_set (thread);
4420 EnterCriticalSection (thread->synch_cs);
4422 if ((thread->state & test) != 0) {
4426 LeaveCriticalSection (thread->synch_cs);
4431 //static MonoClassField *execution_context_field;
4434 get_execution_context_addr (void)
4436 MonoDomain *domain = mono_domain_get ();
4437 guint32 offset = domain->execution_context_field_offset;
4440 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4443 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4445 mono_domain_lock (domain);
4446 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4447 mono_domain_unlock (domain);
4450 domain->execution_context_field_offset = offset;
4453 return (MonoObject**) mono_get_special_static_data (offset);
4457 mono_thread_get_execution_context (void)
4459 return *get_execution_context_addr ();
4463 mono_thread_set_execution_context (MonoObject *ec)
4465 *get_execution_context_addr () = ec;
4468 static gboolean has_tls_get = FALSE;
4471 mono_runtime_set_has_tls_get (gboolean val)
4477 mono_runtime_has_tls_get (void)
4483 mono_thread_kill (MonoInternalThread *thread, int signal)
4485 #ifdef __native_client__
4486 /* Workaround pthread_kill abort() in NaCl glibc. */
4490 /* Win32 uses QueueUserAPC and callers of this are guarded */
4491 g_assert_not_reached ();
4493 # ifdef PTHREAD_POINTER_ID
4494 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4496 # ifdef PLATFORM_ANDROID
4497 if (thread->android_tid != 0) {
4499 int old_errno = errno;
4501 ret = tkill ((pid_t) thread->android_tid, signal);
4510 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4512 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4519 self_interrupt_thread (void *_unused)
4521 MonoThreadInfo *info = mono_thread_info_current ();
4522 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4523 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4524 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4525 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4529 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4533 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4537 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4539 MonoJitInfo **dest = data;
4545 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4547 MonoJitInfo *ji = NULL;
4550 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4555 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4558 MonoThreadInfo *info = NULL;
4559 gboolean protected_wrapper;
4560 gboolean running_managed;
4562 if (!mono_thread_info_new_interrupt_enabled ()) {
4563 signal_thread_state_change (thread);
4568 FIXME this is insanely broken, it doesn't cause interruption to happen
4569 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4571 if (thread == mono_thread_internal_current ()) {
4572 /* Do it synchronously */
4573 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4575 mono_raise_exception (exc);
4577 wapi_interrupt_thread (thread->handle);
4582 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4583 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4587 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4588 mono_thread_info_resume (mono_thread_info_get_tid (info));
4592 /*someone is already interrupting it*/
4593 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4594 mono_thread_info_resume (mono_thread_info_get_tid (info));
4597 InterlockedIncrement (&thread_interruption_requested);
4599 ji = mono_thread_info_get_last_managed (info);
4600 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4601 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4603 if (!protected_wrapper && running_managed) {
4604 /*We are in managed code*/
4605 /*Set the thread to call */
4606 if (install_async_abort)
4607 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4608 mono_thread_info_resume (mono_thread_info_get_tid (info));
4610 gpointer interrupt_handle;
4612 * This will cause waits to be broken.
4613 * It will also prevent the thread from entering a wait, so if the thread returns
4614 * from the wait before it receives the abort signal, it will just spin in the wait
4615 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4619 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4621 mono_thread_info_resume (mono_thread_info_get_tid (info));
4623 wapi_finish_interrupt_thread (interrupt_handle);
4626 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4630 transition_to_suspended (MonoInternalThread *thread)
4632 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4633 g_assert (0); /*FIXME we should not reach this */
4634 /*Make sure we balance the suspend count.*/
4635 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4637 thread->state &= ~ThreadState_SuspendRequested;
4638 thread->state |= ThreadState_Suspended;
4640 LeaveCriticalSection (thread->synch_cs);
4644 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4646 if (!mono_thread_info_new_interrupt_enabled ()) {
4647 signal_thread_state_change (thread);
4651 EnterCriticalSection (thread->synch_cs);
4652 if (thread == mono_thread_internal_current ()) {
4653 transition_to_suspended (thread);
4654 mono_thread_info_self_suspend ();
4656 MonoThreadInfo *info;
4658 gboolean protected_wrapper;
4659 gboolean running_managed;
4661 /*A null info usually means the thread is already dead. */
4662 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4663 LeaveCriticalSection (thread->synch_cs);
4667 ji = mono_thread_info_get_last_managed (info);
4668 protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
4669 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4671 if (running_managed && !protected_wrapper) {
4672 transition_to_suspended (thread);
4674 gpointer interrupt_handle;
4676 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4677 InterlockedIncrement (&thread_interruption_requested);
4680 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4682 mono_thread_info_resume (mono_thread_info_get_tid (info));
4685 wapi_finish_interrupt_thread (interrupt_handle);
4687 LeaveCriticalSection (thread->synch_cs);
4692 /*This is called with @thread synch_cs held and it must release it*/
4694 self_suspend_internal (MonoInternalThread *thread)
4696 if (!mono_thread_info_new_interrupt_enabled ()) {
4697 thread->state &= ~ThreadState_SuspendRequested;
4698 thread->state |= ThreadState_Suspended;
4699 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4700 if (thread->suspend_event == NULL) {
4701 LeaveCriticalSection (thread->synch_cs);
4704 if (thread->suspended_event)
4705 SetEvent (thread->suspended_event);
4707 LeaveCriticalSection (thread->synch_cs);
4709 if (shutting_down) {
4710 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4715 WaitForSingleObject (thread->suspend_event, INFINITE);
4717 EnterCriticalSection (thread->synch_cs);
4719 CloseHandle (thread->suspend_event);
4720 thread->suspend_event = NULL;
4721 thread->state &= ~ThreadState_Suspended;
4723 /* The thread that requested the resume will have replaced this event
4724 * and will be waiting for it
4726 SetEvent (thread->resume_event);
4728 LeaveCriticalSection (thread->synch_cs);
4732 transition_to_suspended (thread);
4733 mono_thread_info_self_suspend ();
4736 /*This is called with @thread synch_cs held and it must release it*/
4738 resume_thread_internal (MonoInternalThread *thread)
4740 if (!mono_thread_info_new_interrupt_enabled ()) {
4741 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4742 if (thread->resume_event == NULL) {
4743 LeaveCriticalSection (thread->synch_cs);
4747 /* Awake the thread */
4748 SetEvent (thread->suspend_event);
4750 LeaveCriticalSection (thread->synch_cs);
4752 /* Wait for the thread to awake */
4753 WaitForSingleObject (thread->resume_event, INFINITE);
4754 CloseHandle (thread->resume_event);
4755 thread->resume_event = NULL;
4759 LeaveCriticalSection (thread->synch_cs);
4760 /* Awake the thread */
4761 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4763 EnterCriticalSection (thread->synch_cs);
4764 thread->state &= ~ThreadState_Suspended;
4765 LeaveCriticalSection (thread->synch_cs);
4771 * mono_thread_is_foreign:
4772 * @thread: the thread to query
4774 * This function allows one to determine if a thread was created by the mono runtime and has
4775 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4777 * Returns: true if @thread was not created by the runtime.
4780 mono_thread_is_foreign (MonoThread *thread)
4782 MonoThreadInfo *info = thread->internal_thread->thread_info;
4783 return info->runtime_thread == FALSE;