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 offset)
820 // __asm__("movl %%fs:%a[offset], %k[value]" : [value] "=q" (value) : [offset] "irm" (offset));
821 __asm__ volatile ("movl %%fs:%1,%0"
822 : "=r" (value) ,"=m" ((*(volatile long *) offset)));
828 * mono_thread_get_stack_bounds:
830 * Return the address and size of the current threads stack. Return NULL as the
831 * stack address if the stack address cannot be determined.
834 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
836 #if defined(HOST_WIN32)
838 /* http://en.wikipedia.org/wiki/Win32_Thread_Information_Block */
839 void* tib = (void*)__readfsdword(0x18);
840 guint8 *stackTop = (guint8*)*(int*)((char*)tib + 4);
841 guint8 *stackBottom = (guint8*)*(int*)((char*)tib + 8);
843 *staddr = stackBottom;
844 *stsize = stackTop - stackBottom;
847 #elif defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
849 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self());
850 *stsize = pthread_get_stacksize_np (pthread_self());
852 /* staddr points to the start of the stack, not the end */
855 /* When running under emacs, sometimes staddr is not aligned to a page size */
856 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize() - 1));
859 #elif (defined(HAVE_PTHREAD_GETATTR_NP) || defined(HAVE_PTHREAD_ATTR_GET_NP)) && defined(HAVE_PTHREAD_ATTR_GETSTACK)
863 guint8 *current = (guint8*)&attr;
866 *stsize = (size_t)-1;
868 pthread_attr_init (&attr);
870 #if defined(HAVE_PTHREAD_GETATTR_NP)
872 pthread_getattr_np (pthread_self(), &attr);
874 #elif defined(HAVE_PTHREAD_ATTR_GET_NP)
876 pthread_attr_get_np (pthread_self(), &attr);
879 #error Cannot determine which API is needed to retrieve pthread attributes.
882 pthread_attr_getstack (&attr, (void**)staddr, stsize);
883 pthread_attr_destroy (&attr);
886 g_assert ((current > *staddr) && (current < *staddr + *stsize));
888 /* When running under emacs, sometimes staddr is not aligned to a page size */
889 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
892 #elif defined(__OpenBSD__)
894 /* TODO : Determine if this code is actually still needed. It may already be covered by the case above. */
897 guint8 *current = (guint8*)&attr;
900 *stsize = (size_t)-1;
902 pthread_attr_init (&attr);
907 rslt = pthread_stackseg_np(pthread_self(), &ss);
908 g_assert (rslt == 0);
910 *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
911 *stsize = ss.ss_size;
913 pthread_attr_destroy (&attr);
916 g_assert ((current > *staddr) && (current < *staddr + *stsize));
918 /* When running under emacs, sometimes staddr is not aligned to a page size */
919 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
922 #elif defined(sun) || defined(__native_client__)
923 /* Solaris/Illumos, NaCl */
925 pthread_attr_init (&attr);
926 pthread_attr_getstacksize (&attr, &stsize);
927 pthread_attr_destroy (&attr);
932 /* FIXME: It'd be better to use the 'error' preprocessor macro here so we know
933 at compile-time if the target platform isn't supported. */
934 #warning "Unable to determine how to retrieve a thread's stack-bounds for this platform in 'mono_thread_get_stack_bounds()'."
942 mono_thread_attach (MonoDomain *domain)
944 return mono_thread_attach_full (domain, FALSE);
948 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
950 MonoThreadInfo *info;
951 MonoInternalThread *thread;
952 MonoThread *current_thread;
953 HANDLE thread_handle;
956 if ((thread = mono_thread_internal_current ())) {
957 if (domain != mono_domain_get ())
958 mono_domain_set (domain, TRUE);
959 /* Already attached */
960 return mono_thread_current ();
963 if (!mono_gc_register_thread (&domain)) {
964 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 ());
967 thread = create_internal_thread_object ();
969 thread_handle = GetCurrentThread ();
970 g_assert (thread_handle);
972 tid=GetCurrentThreadId ();
975 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
976 * refer to the thread from other threads for things like aborting.
978 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
979 THREAD_ALL_ACCESS, TRUE, 0);
981 thread->handle=thread_handle;
983 #ifdef PLATFORM_ANDROID
984 thread->android_tid = (gpointer) gettid ();
986 thread->apartment_state=ThreadApartmentState_Unknown;
987 thread->managed_id = get_next_managed_thread_id ();
988 if (mono_gc_is_moving ()) {
989 thread->thread_pinning_ref = thread;
990 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
993 thread->stack_ptr = &tid;
995 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
996 InitializeCriticalSection (thread->synch_cs);
998 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1000 info = mono_thread_info_current ();
1002 thread->thread_info = info;
1004 current_thread = new_thread_with_internal (domain, thread);
1006 if (!handle_store (current_thread, force_attach)) {
1007 /* Mono is shutting down, so just wait for the end */
1012 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
1014 SET_CURRENT_OBJECT (thread);
1015 mono_domain_set (domain, TRUE);
1017 mono_monitor_init_tls ();
1019 thread_adjust_static_data (thread);
1021 init_root_domain_thread (thread, current_thread);
1022 if (domain != mono_get_root_domain ())
1023 set_current_thread_for_domain (domain, thread, current_thread);
1026 if (mono_thread_attach_cb) {
1030 mono_thread_get_stack_bounds (&staddr, &stsize);
1033 mono_thread_attach_cb (tid, &tid);
1035 mono_thread_attach_cb (tid, staddr + stsize);
1038 // FIXME: Need a separate callback
1039 mono_profiler_thread_start (tid);
1041 return current_thread;
1045 mono_thread_detach (MonoThread *thread)
1047 g_return_if_fail (thread != NULL);
1049 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
1051 thread_cleanup (thread->internal_thread);
1053 SET_CURRENT_OBJECT (NULL);
1054 mono_domain_unset ();
1056 /* Don't need to CloseHandle this thread, even though we took a
1057 * reference in mono_thread_attach (), because the GC will do it
1058 * when the Thread object is finalised.
1065 MonoInternalThread *thread = mono_thread_internal_current ();
1067 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1069 thread_cleanup (thread);
1070 SET_CURRENT_OBJECT (NULL);
1071 mono_domain_unset ();
1073 /* we could add a callback here for embedders to use. */
1074 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1075 exit (mono_environment_exitcode_get ());
1080 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1082 MonoInternalThread *internal = create_internal_thread_object ();
1084 internal->state = ThreadState_Unstarted;
1085 internal->apartment_state = ThreadApartmentState_Unknown;
1086 internal->managed_id = get_next_managed_thread_id ();
1088 InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1091 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
1094 guint32 (*start_func)(void *);
1095 struct StartInfo *start_info;
1098 MonoInternalThread *internal;
1100 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1102 if (!this->internal_thread)
1103 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1104 internal = this->internal_thread;
1106 ensure_synch_cs_set (internal);
1108 EnterCriticalSection (internal->synch_cs);
1110 if ((internal->state & ThreadState_Unstarted) == 0) {
1111 LeaveCriticalSection (internal->synch_cs);
1112 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1116 if ((internal->state & ThreadState_Aborted) != 0) {
1117 LeaveCriticalSection (internal->synch_cs);
1122 /* This is freed in start_wrapper */
1123 start_info = g_new0 (struct StartInfo, 1);
1124 start_info->func = start_func;
1125 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1126 start_info->delegate = start;
1127 start_info->obj = this;
1128 g_assert (this->obj.vtable->domain == mono_domain_get ());
1130 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1131 if (internal->start_notify==NULL) {
1132 LeaveCriticalSection (internal->synch_cs);
1133 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1134 g_free (start_info);
1138 mono_threads_lock ();
1139 register_thread_start_argument (this, start_info);
1140 if (threads_starting_up == NULL) {
1141 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up);
1142 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1144 mono_g_hash_table_insert (threads_starting_up, this, this);
1145 mono_threads_unlock ();
1147 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1148 CREATE_SUSPENDED, &tid);
1150 LeaveCriticalSection (internal->synch_cs);
1151 mono_threads_lock ();
1152 mono_g_hash_table_remove (threads_starting_up, this);
1153 mono_threads_unlock ();
1154 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1158 internal->handle=thread;
1160 if (mono_gc_is_moving ()) {
1161 internal->thread_pinning_ref = internal;
1162 MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
1166 /* Don't call handle_store() here, delay it to Start.
1167 * We can't join a thread (trying to will just block
1168 * forever) until it actually starts running, so don't
1169 * store the handle till then.
1172 mono_thread_start (this);
1174 internal->state &= ~ThreadState_Unstarted;
1176 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1178 LeaveCriticalSection (internal->synch_cs);
1183 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1185 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1188 CloseHandle (thread);
1190 if (this->synch_cs) {
1191 CRITICAL_SECTION *synch_cs = this->synch_cs;
1192 this->synch_cs = NULL;
1193 DeleteCriticalSection (synch_cs);
1198 void *name = this->name;
1204 static void mono_thread_start (MonoThread *thread)
1206 MonoInternalThread *internal = thread->internal_thread;
1208 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1210 /* Only store the handle when the thread is about to be
1211 * launched, to avoid the main thread deadlocking while trying
1212 * to clean up a thread that will never be signalled.
1214 if (!handle_store (thread, FALSE))
1217 ResumeThread (internal->handle);
1219 if(internal->start_notify!=NULL) {
1220 /* Wait for the thread to set up its TLS data etc, so
1221 * theres no potential race condition if someone tries
1222 * to look up the data believing the thread has
1226 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1228 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1229 CloseHandle (internal->start_notify);
1230 internal->start_notify = NULL;
1233 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
1236 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1239 MonoInternalThread *thread = mono_thread_internal_current ();
1241 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1243 mono_thread_current_check_pending_interrupt ();
1246 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1248 res = SleepEx(ms,TRUE);
1250 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1252 if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1253 MonoException* exc = mono_thread_execute_interruption (thread);
1255 mono_raise_exception (exc);
1267 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1272 ves_icall_System_Threading_Thread_GetDomainID (void)
1274 return mono_domain_get()->domain_id;
1278 ves_icall_System_Threading_Thread_Yield (void)
1281 return SwitchToThread ();
1283 return sched_yield () == 0;
1288 * mono_thread_get_name:
1290 * Return the name of the thread. NAME_LEN is set to the length of the name.
1291 * Return NULL if the thread has no name. The returned memory is owned by the
1295 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1299 ensure_synch_cs_set (this_obj);
1301 EnterCriticalSection (this_obj->synch_cs);
1303 if (!this_obj->name) {
1307 *name_len = this_obj->name_len;
1308 res = g_new (gunichar2, this_obj->name_len);
1309 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1312 LeaveCriticalSection (this_obj->synch_cs);
1318 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1322 ensure_synch_cs_set (this_obj);
1324 EnterCriticalSection (this_obj->synch_cs);
1326 if (!this_obj->name)
1329 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1331 LeaveCriticalSection (this_obj->synch_cs);
1337 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
1339 ensure_synch_cs_set (this_obj);
1341 EnterCriticalSection (this_obj->synch_cs);
1343 if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1344 LeaveCriticalSection (this_obj->synch_cs);
1346 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1350 this_obj->name = g_new (gunichar2, mono_string_length (name));
1351 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1352 this_obj->name_len = mono_string_length (name);
1355 this_obj->name = NULL;
1358 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1360 LeaveCriticalSection (this_obj->synch_cs);
1361 if (this_obj->name) {
1362 char *tname = mono_string_to_utf8 (name);
1363 mono_profiler_thread_name (this_obj->tid, tname);
1369 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1371 mono_thread_set_name_internal (this_obj, name, TRUE);
1374 /* If the array is already in the requested domain, we just return it,
1375 otherwise we return a copy in that domain. */
1377 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1384 if (mono_object_domain (arr) == domain)
1387 copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1388 mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1393 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1395 return byte_array_to_domain (arr, mono_get_root_domain ());
1399 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1401 return byte_array_to_domain (arr, mono_domain_get ());
1405 mono_thread_current (void)
1407 MonoDomain *domain = mono_domain_get ();
1408 MonoInternalThread *internal = mono_thread_internal_current ();
1409 MonoThread **current_thread_ptr;
1411 g_assert (internal);
1412 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1414 if (!*current_thread_ptr) {
1415 g_assert (domain != mono_get_root_domain ());
1416 *current_thread_ptr = new_thread_with_internal (domain, internal);
1418 return *current_thread_ptr;
1422 mono_thread_internal_current (void)
1424 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1425 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1429 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1430 int ms, HANDLE thread)
1432 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1435 mono_thread_current_check_pending_interrupt ();
1437 ensure_synch_cs_set (this);
1439 EnterCriticalSection (this->synch_cs);
1441 if ((this->state & ThreadState_Unstarted) != 0) {
1442 LeaveCriticalSection (this->synch_cs);
1444 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1448 LeaveCriticalSection (this->synch_cs);
1453 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1455 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1457 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1459 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1461 if(ret==WAIT_OBJECT_0) {
1462 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1467 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1473 mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
1481 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1484 ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
1486 ret = WaitForSingleObjectEx (handles [0], ms, alertable);
1488 if (ret != WAIT_IO_COMPLETION)
1491 exc = mono_thread_execute_interruption (thread);
1493 mono_raise_exception (exc);
1498 /* Re-calculate ms according to the time passed */
1499 diff_ms = (mono_100ns_ticks () - start) / 10000;
1500 if (diff_ms >= ms) {
1504 wait = ms - diff_ms;
1510 /* FIXME: exitContext isnt documented */
1511 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1517 MonoObject *waitHandle;
1518 MonoInternalThread *thread = mono_thread_internal_current ();
1520 /* Do this WaitSleepJoin check before creating objects */
1521 mono_thread_current_check_pending_interrupt ();
1523 numhandles = mono_array_length(mono_handles);
1524 handles = g_new0(HANDLE, numhandles);
1526 for(i = 0; i < numhandles; i++) {
1527 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1528 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1535 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1537 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
1539 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1543 if(ret==WAIT_FAILED) {
1544 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1546 } else if(ret==WAIT_TIMEOUT) {
1547 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1554 /* FIXME: exitContext isnt documented */
1555 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1557 HANDLE handles [MAXIMUM_WAIT_OBJECTS];
1561 MonoObject *waitHandle;
1562 MonoInternalThread *thread = mono_thread_internal_current ();
1564 /* Do this WaitSleepJoin check before creating objects */
1565 mono_thread_current_check_pending_interrupt ();
1567 numhandles = mono_array_length(mono_handles);
1568 if (numhandles > MAXIMUM_WAIT_OBJECTS)
1571 for(i = 0; i < numhandles; i++) {
1572 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1573 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1580 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1582 ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
1584 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1586 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1589 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1591 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1592 return ret - WAIT_OBJECT_0;
1594 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1595 return ret - WAIT_ABANDONED_0;
1602 /* FIXME: exitContext isnt documented */
1603 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1606 MonoInternalThread *thread = mono_thread_internal_current ();
1608 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1614 mono_thread_current_check_pending_interrupt ();
1616 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1618 ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
1620 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1622 if(ret==WAIT_FAILED) {
1623 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1625 } else if(ret==WAIT_TIMEOUT) {
1626 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1634 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1637 MonoInternalThread *thread = mono_thread_internal_current ();
1642 mono_thread_current_check_pending_interrupt ();
1644 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1646 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1648 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1650 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1653 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1660 mutex = CreateMutex (NULL, owned, NULL);
1662 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1664 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1672 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1673 return(ReleaseMutex (handle));
1676 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1682 *error = ERROR_SUCCESS;
1684 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1686 *error = GetLastError ();
1693 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1700 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1702 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1703 mono_string_chars (name));
1705 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1713 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1717 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1722 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1726 *error = ERROR_SUCCESS;
1728 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1730 *error = GetLastError ();
1736 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1743 event = CreateEvent (NULL, manual, initial, NULL);
1745 event = CreateEvent (NULL, manual, initial,
1746 mono_string_chars (name));
1748 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1756 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1757 return (SetEvent(handle));
1760 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1761 return (ResetEvent(handle));
1765 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1766 CloseHandle (handle);
1769 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1775 *error = ERROR_SUCCESS;
1777 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1779 *error = GetLastError ();
1785 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1787 return InterlockedIncrement (location);
1790 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1792 return InterlockedIncrement64 (location);
1795 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1797 return InterlockedDecrement(location);
1800 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1804 mono_interlocked_lock ();
1808 mono_interlocked_unlock ();
1813 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1815 return InterlockedExchange(location, value);
1818 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1821 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1822 mono_gc_wbarrier_generic_nostore (location);
1826 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1828 return InterlockedExchangePointer(location, value);
1831 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1833 IntFloatUnion val, ret;
1836 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1842 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1844 #if SIZEOF_VOID_P == 8
1845 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1850 * According to MSDN, this function is only atomic with regards to the
1851 * other Interlocked functions on 32 bit platforms.
1853 mono_interlocked_lock ();
1856 mono_interlocked_unlock ();
1863 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1865 #if SIZEOF_VOID_P == 8
1866 LongDoubleUnion val, ret;
1869 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1876 * According to MSDN, this function is only atomic with regards to the
1877 * other Interlocked functions on 32 bit platforms.
1879 mono_interlocked_lock ();
1882 mono_interlocked_unlock ();
1888 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1890 return InterlockedCompareExchange(location, value, comparand);
1893 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1896 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1897 mono_gc_wbarrier_generic_nostore (location);
1901 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1903 return InterlockedCompareExchangePointer(location, value, comparand);
1906 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1908 IntFloatUnion val, ret, cmp;
1911 cmp.fval = comparand;
1912 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1918 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1920 #if SIZEOF_VOID_P == 8
1921 LongDoubleUnion val, comp, ret;
1924 comp.fval = comparand;
1925 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1931 mono_interlocked_lock ();
1933 if (old == comparand)
1935 mono_interlocked_unlock ();
1942 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1944 #if SIZEOF_VOID_P == 4
1945 if ((size_t)location & 0x7) {
1947 mono_interlocked_lock ();
1949 if (old == comparand)
1951 mono_interlocked_unlock ();
1955 return InterlockedCompareExchange64 (location, value, comparand);
1959 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1962 res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1963 mono_gc_wbarrier_generic_nostore (location);
1968 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1971 res = InterlockedExchangePointer ((gpointer *)location, value);
1972 mono_gc_wbarrier_generic_nostore (location);
1977 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1979 #if SIZEOF_VOID_P == 8
1980 /* Should be implemented as a JIT intrinsic */
1981 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1986 mono_interlocked_lock ();
1988 *location = orig + value;
1989 mono_interlocked_unlock ();
1991 return orig + value;
1996 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1998 #if SIZEOF_VOID_P == 8
1999 /* Should be implemented as a JIT intrinsic */
2000 mono_raise_exception (mono_get_exception_not_implemented (NULL));
2005 mono_interlocked_lock ();
2007 *location = orig + value;
2008 mono_interlocked_unlock ();
2010 return orig + value;
2015 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2017 return InterlockedRead64 (location);
2021 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2023 mono_memory_barrier ();
2027 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
2029 mono_thread_clr_state (this, state);
2031 if (state & ThreadState_Background) {
2032 /* If the thread changes the background mode, the main thread has to
2033 * be notified, since it has to rebuild the list of threads to
2036 SetEvent (background_change_event);
2041 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
2043 mono_thread_set_state (this, state);
2045 if (state & ThreadState_Background) {
2046 /* If the thread changes the background mode, the main thread has to
2047 * be notified, since it has to rebuild the list of threads to
2050 SetEvent (background_change_event);
2055 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2059 ensure_synch_cs_set (this);
2061 EnterCriticalSection (this->synch_cs);
2063 state = this->state;
2065 LeaveCriticalSection (this->synch_cs);
2070 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2072 MonoInternalThread *current;
2075 ensure_synch_cs_set (this);
2077 current = mono_thread_internal_current ();
2079 EnterCriticalSection (this->synch_cs);
2081 this->thread_interrupt_requested = TRUE;
2082 throw = current != this && (this->state & ThreadState_WaitSleepJoin);
2084 LeaveCriticalSection (this->synch_cs);
2087 abort_thread_internal (this, TRUE, FALSE);
2091 void mono_thread_current_check_pending_interrupt ()
2093 MonoInternalThread *thread = mono_thread_internal_current ();
2094 gboolean throw = FALSE;
2096 mono_debugger_check_interruption ();
2098 ensure_synch_cs_set (thread);
2100 EnterCriticalSection (thread->synch_cs);
2102 if (thread->thread_interrupt_requested) {
2104 thread->thread_interrupt_requested = FALSE;
2107 LeaveCriticalSection (thread->synch_cs);
2110 mono_raise_exception (mono_get_exception_thread_interrupted ());
2115 mono_thread_get_abort_signal (void)
2119 #elif defined(PLATFORM_ANDROID)
2121 #elif !defined (SIGRTMIN)
2126 #endif /* SIGUSR1 */
2128 static int abort_signum = -1;
2130 if (abort_signum != -1)
2131 return abort_signum;
2132 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2133 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2134 struct sigaction sinfo;
2135 sigaction (i, NULL, &sinfo);
2136 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2141 /* fallback to the old way */
2143 #endif /* HOST_WIN32 */
2147 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2149 MonoException* exc = mono_thread_request_interruption (FALSE);
2150 if (exc) mono_raise_exception (exc);
2152 #endif /* HOST_WIN32 */
2155 * signal_thread_state_change
2157 * Tells the thread that his state has changed and it has to enter the new
2158 * state as soon as possible.
2160 static void signal_thread_state_change (MonoInternalThread *thread)
2162 if (thread == mono_thread_internal_current ()) {
2163 /* Do it synchronously */
2164 MonoException *exc = mono_thread_request_interruption (FALSE);
2166 mono_raise_exception (exc);
2170 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2172 /* fixme: store the state somewhere */
2173 mono_thread_kill (thread, mono_thread_get_abort_signal ());
2176 * This will cause waits to be broken.
2177 * It will also prevent the thread from entering a wait, so if the thread returns
2178 * from the wait before it receives the abort signal, it will just spin in the wait
2179 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2182 wapi_interrupt_thread (thread->handle);
2183 #endif /* HOST_WIN32 */
2187 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2189 ensure_synch_cs_set (thread);
2191 EnterCriticalSection (thread->synch_cs);
2193 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2194 (thread->state & ThreadState_StopRequested) != 0 ||
2195 (thread->state & ThreadState_Stopped) != 0)
2197 LeaveCriticalSection (thread->synch_cs);
2201 if ((thread->state & ThreadState_Unstarted) != 0) {
2202 thread->state |= ThreadState_Aborted;
2203 LeaveCriticalSection (thread->synch_cs);
2207 thread->state |= ThreadState_AbortRequested;
2208 if (thread->abort_state_handle)
2209 mono_gchandle_free (thread->abort_state_handle);
2211 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2212 g_assert (thread->abort_state_handle);
2214 thread->abort_state_handle = 0;
2216 thread->abort_exc = NULL;
2219 * abort_exc is set in mono_thread_execute_interruption(),
2220 * triggered by the call to signal_thread_state_change(),
2221 * below. There's a point between where we have
2222 * abort_state_handle set, but abort_exc NULL, but that's not
2226 LeaveCriticalSection (thread->synch_cs);
2228 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2230 /* During shutdown, we can't wait for other threads */
2232 /* Make sure the thread is awake */
2233 mono_thread_resume (thread);
2235 abort_thread_internal (thread, TRUE, TRUE);
2239 ves_icall_System_Threading_Thread_ResetAbort (void)
2241 MonoInternalThread *thread = mono_thread_internal_current ();
2242 gboolean was_aborting;
2244 ensure_synch_cs_set (thread);
2246 EnterCriticalSection (thread->synch_cs);
2247 was_aborting = thread->state & ThreadState_AbortRequested;
2248 thread->state &= ~ThreadState_AbortRequested;
2249 LeaveCriticalSection (thread->synch_cs);
2251 if (!was_aborting) {
2252 const char *msg = "Unable to reset abort because no abort was requested";
2253 mono_raise_exception (mono_get_exception_thread_state (msg));
2255 thread->abort_exc = NULL;
2256 if (thread->abort_state_handle) {
2257 mono_gchandle_free (thread->abort_state_handle);
2258 /* This is actually not necessary - the handle
2259 only counts if the exception is set */
2260 thread->abort_state_handle = 0;
2265 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2267 ensure_synch_cs_set (thread);
2269 EnterCriticalSection (thread->synch_cs);
2271 thread->state &= ~ThreadState_AbortRequested;
2273 if (thread->abort_exc) {
2274 thread->abort_exc = NULL;
2275 if (thread->abort_state_handle) {
2276 mono_gchandle_free (thread->abort_state_handle);
2277 /* This is actually not necessary - the handle
2278 only counts if the exception is set */
2279 thread->abort_state_handle = 0;
2283 LeaveCriticalSection (thread->synch_cs);
2287 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2289 MonoInternalThread *thread = this->internal_thread;
2290 MonoObject *state, *deserialized = NULL, *exc;
2293 if (!thread->abort_state_handle)
2296 state = mono_gchandle_get_target (thread->abort_state_handle);
2299 domain = mono_domain_get ();
2300 if (mono_object_domain (state) == domain)
2303 deserialized = mono_object_xdomain_representation (state, domain, &exc);
2305 if (!deserialized) {
2306 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2308 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2309 mono_raise_exception (invalid_op_exc);
2312 return deserialized;
2316 mono_thread_suspend (MonoInternalThread *thread)
2318 ensure_synch_cs_set (thread);
2320 EnterCriticalSection (thread->synch_cs);
2322 if ((thread->state & ThreadState_Unstarted) != 0 ||
2323 (thread->state & ThreadState_Aborted) != 0 ||
2324 (thread->state & ThreadState_Stopped) != 0)
2326 LeaveCriticalSection (thread->synch_cs);
2330 if ((thread->state & ThreadState_Suspended) != 0 ||
2331 (thread->state & ThreadState_SuspendRequested) != 0 ||
2332 (thread->state & ThreadState_StopRequested) != 0)
2334 LeaveCriticalSection (thread->synch_cs);
2338 thread->state |= ThreadState_SuspendRequested;
2340 LeaveCriticalSection (thread->synch_cs);
2342 suspend_thread_internal (thread, FALSE);
2347 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2349 if (!mono_thread_suspend (thread))
2350 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2354 mono_thread_resume (MonoInternalThread *thread)
2356 ensure_synch_cs_set (thread);
2358 EnterCriticalSection (thread->synch_cs);
2360 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2361 thread->state &= ~ThreadState_SuspendRequested;
2362 LeaveCriticalSection (thread->synch_cs);
2366 if ((thread->state & ThreadState_Suspended) == 0 ||
2367 (thread->state & ThreadState_Unstarted) != 0 ||
2368 (thread->state & ThreadState_Aborted) != 0 ||
2369 (thread->state & ThreadState_Stopped) != 0)
2371 LeaveCriticalSection (thread->synch_cs);
2375 return resume_thread_internal (thread);
2379 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2381 if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2382 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2386 mono_threads_is_critical_method (MonoMethod *method)
2388 switch (method->wrapper_type) {
2389 case MONO_WRAPPER_RUNTIME_INVOKE:
2390 case MONO_WRAPPER_XDOMAIN_INVOKE:
2391 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2398 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2403 if (mono_threads_is_critical_method (m)) {
2404 *((gboolean*)data) = TRUE;
2411 is_running_protected_wrapper (void)
2413 gboolean found = FALSE;
2414 mono_stack_walk (find_wrapper, &found);
2418 void mono_thread_internal_stop (MonoInternalThread *thread)
2420 ensure_synch_cs_set (thread);
2422 EnterCriticalSection (thread->synch_cs);
2424 if ((thread->state & ThreadState_StopRequested) != 0 ||
2425 (thread->state & ThreadState_Stopped) != 0)
2427 LeaveCriticalSection (thread->synch_cs);
2431 /* Make sure the thread is awake */
2432 mono_thread_resume (thread);
2434 thread->state |= ThreadState_StopRequested;
2435 thread->state &= ~ThreadState_AbortRequested;
2437 LeaveCriticalSection (thread->synch_cs);
2439 abort_thread_internal (thread, TRUE, TRUE);
2442 void mono_thread_stop (MonoThread *thread)
2444 mono_thread_internal_stop (thread->internal_thread);
2448 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2450 return *((volatile gint8 *) (ptr));
2454 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2456 return *((volatile gint16 *) (ptr));
2460 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2462 return *((volatile gint32 *) (ptr));
2466 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2468 #if SIZEOF_VOID_P == 8
2469 return *((volatile gint64 *) (ptr));
2471 if ((size_t)ptr & 0x7) {
2473 mono_interlocked_lock ();
2474 value = *(gint64 *)ptr;
2475 mono_interlocked_unlock ();
2478 return InterlockedCompareExchange64 (ptr, 0, 0); /*Must ensure atomicity of the operation. */
2483 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2485 return (void *) *((volatile void **) ptr);
2489 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2491 return *((volatile double *) (ptr));
2495 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2497 return *((volatile float *) (ptr));
2501 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2503 return (MonoObject*)*((volatile MonoObject**)ptr);
2507 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2509 *((volatile gint8 *) ptr) = value;
2513 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2515 *((volatile gint16 *) ptr) = value;
2519 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2521 *((volatile gint32 *) ptr) = value;
2525 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2527 *((volatile gint64 *) ptr) = value;
2531 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2533 *((volatile void **) ptr) = value;
2537 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2539 mono_gc_wbarrier_generic_store (ptr, value);
2543 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2545 *((volatile double *) ptr) = value;
2549 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2551 *((volatile float *) ptr) = value;
2555 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2557 *((volatile MonoObject **) ptr) = value;
2558 mono_gc_wbarrier_generic_nostore (ptr);
2562 mono_thread_init_tls (void)
2564 MONO_FAST_TLS_INIT (tls_current_object);
2565 mono_native_tls_alloc (¤t_object_key, NULL);
2568 void mono_thread_init (MonoThreadStartCB start_cb,
2569 MonoThreadAttachCB attach_cb)
2571 InitializeCriticalSection(&threads_mutex);
2572 InitializeCriticalSection(&interlocked_mutex);
2573 InitializeCriticalSection(&contexts_mutex);
2575 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2576 g_assert(background_change_event != NULL);
2578 mono_init_static_data_info (&thread_static_info);
2579 mono_init_static_data_info (&context_static_info);
2581 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2583 mono_thread_start_cb = start_cb;
2584 mono_thread_attach_cb = attach_cb;
2586 /* Get a pseudo handle to the current process. This is just a
2587 * kludge so that wapi can build a process handle if needed.
2588 * As a pseudo handle is returned, we don't need to clean
2591 GetCurrentProcess ();
2594 void mono_thread_cleanup (void)
2596 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2597 /* The main thread must abandon any held mutexes (particularly
2598 * important for named mutexes as they are shared across
2599 * processes, see bug 74680.) This will happen when the
2600 * thread exits, but if it's not running in a subthread it
2601 * won't exit in time.
2603 /* Using non-w32 API is a nasty kludge, but I couldn't find
2604 * anything in the documentation that would let me do this
2605 * here yet still be safe to call on windows.
2607 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2611 /* This stuff needs more testing, it seems one of these
2612 * critical sections can be locked when mono_thread_cleanup is
2615 DeleteCriticalSection (&threads_mutex);
2616 DeleteCriticalSection (&interlocked_mutex);
2617 DeleteCriticalSection (&contexts_mutex);
2618 DeleteCriticalSection (&delayed_free_table_mutex);
2619 DeleteCriticalSection (&small_id_mutex);
2620 CloseHandle (background_change_event);
2623 mono_native_tls_free (current_object_key);
2627 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2629 mono_thread_cleanup_fn = func;
2633 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2635 thread->internal_thread->manage_callback = func;
2638 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2640 mono_thread_notify_pending_exc_fn = func;
2644 static void print_tids (gpointer key, gpointer value, gpointer user)
2646 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2647 * sizeof(uint) and a cast to uint would overflow
2649 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2650 * print this as a pointer.
2652 g_message ("Waiting for: %p", key);
2657 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2658 MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2662 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2666 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2668 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2670 if(ret==WAIT_FAILED) {
2671 /* See the comment in build_wait_tids() */
2672 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2676 for(i=0; i<wait->num; i++)
2677 CloseHandle (wait->handles[i]);
2679 if (ret == WAIT_TIMEOUT)
2682 for(i=0; i<wait->num; i++) {
2683 gsize tid = wait->threads[i]->tid;
2685 mono_threads_lock ();
2686 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2687 /* This thread must have been killed, because
2688 * it hasn't cleaned itself up. (It's just
2689 * possible that the thread exited before the
2690 * parent thread had a chance to store the
2691 * handle, and now there is another pointer to
2692 * the already-exited thread stored. In this
2693 * case, we'll just get two
2694 * mono_profiler_thread_end() calls for the
2698 mono_threads_unlock ();
2699 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2700 thread_cleanup (wait->threads[i]);
2702 mono_threads_unlock ();
2707 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2709 guint32 i, ret, count;
2711 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2713 /* Add the thread state change event, so it wakes up if a thread changes
2714 * to background mode.
2717 if (count < MAXIMUM_WAIT_OBJECTS) {
2718 wait->handles [count] = background_change_event;
2722 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2724 if(ret==WAIT_FAILED) {
2725 /* See the comment in build_wait_tids() */
2726 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2730 for(i=0; i<wait->num; i++)
2731 CloseHandle (wait->handles[i]);
2733 if (ret == WAIT_TIMEOUT)
2736 if (ret < wait->num) {
2737 gsize tid = wait->threads[ret]->tid;
2738 mono_threads_lock ();
2739 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2740 /* See comment in wait_for_tids about thread cleanup */
2741 mono_threads_unlock ();
2742 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2743 thread_cleanup (wait->threads [ret]);
2745 mono_threads_unlock ();
2749 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2751 struct wait_data *wait=(struct wait_data *)user;
2753 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2755 MonoInternalThread *thread=(MonoInternalThread *)value;
2757 /* Ignore background threads, we abort them later */
2758 /* Do not lock here since it is not needed and the caller holds threads_lock */
2759 if (thread->state & ThreadState_Background) {
2760 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2761 return; /* just leave, ignore */
2764 if (mono_gc_is_finalizer_internal_thread (thread)) {
2765 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2769 if (thread == mono_thread_internal_current ()) {
2770 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2774 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2775 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2779 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2780 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2784 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2785 if (handle == NULL) {
2786 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2790 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2791 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2792 wait->handles[wait->num]=handle;
2793 wait->threads[wait->num]=thread;
2796 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2798 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2803 /* Just ignore the rest, we can't do anything with
2810 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2812 struct wait_data *wait=(struct wait_data *)user;
2813 gsize self = GetCurrentThreadId ();
2814 MonoInternalThread *thread = value;
2817 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2820 /* The finalizer thread is not a background thread */
2821 if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2822 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2824 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2828 /* printf ("A: %d\n", wait->num); */
2829 wait->handles[wait->num]=thread->handle;
2830 wait->threads[wait->num]=thread;
2833 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2834 mono_thread_internal_stop (thread);
2838 return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2842 * mono_threads_set_shutting_down:
2844 * Is called by a thread that wants to shut down Mono. If the runtime is already
2845 * shutting down, the calling thread is suspended/stopped, and this function never
2849 mono_threads_set_shutting_down (void)
2851 MonoInternalThread *current_thread = mono_thread_internal_current ();
2853 mono_threads_lock ();
2855 if (shutting_down) {
2856 mono_threads_unlock ();
2858 /* Make sure we're properly suspended/stopped */
2860 EnterCriticalSection (current_thread->synch_cs);
2862 if ((current_thread->state & ThreadState_SuspendRequested) ||
2863 (current_thread->state & ThreadState_AbortRequested) ||
2864 (current_thread->state & ThreadState_StopRequested)) {
2865 LeaveCriticalSection (current_thread->synch_cs);
2866 mono_thread_execute_interruption (current_thread);
2868 current_thread->state |= ThreadState_Stopped;
2869 LeaveCriticalSection (current_thread->synch_cs);
2872 /*since we're killing the thread, unset the current domain.*/
2873 mono_domain_unset ();
2875 /* Wake up other threads potentially waiting for us */
2878 shutting_down = TRUE;
2880 /* Not really a background state change, but this will
2881 * interrupt the main thread if it is waiting for all
2882 * the other threads.
2884 SetEvent (background_change_event);
2886 mono_threads_unlock ();
2890 void mono_thread_manage (void)
2892 struct wait_data wait_data;
2893 struct wait_data *wait = &wait_data;
2895 memset (wait, 0, sizeof (struct wait_data));
2896 /* join each thread that's still running */
2897 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2899 mono_threads_lock ();
2901 THREAD_DEBUG (g_message("%s: No threads", __func__));
2902 mono_threads_unlock ();
2905 mono_threads_unlock ();
2908 mono_threads_lock ();
2909 if (shutting_down) {
2910 /* somebody else is shutting down */
2911 mono_threads_unlock ();
2914 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2915 mono_g_hash_table_foreach (threads, print_tids, NULL));
2917 ResetEvent (background_change_event);
2919 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2920 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2921 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2922 mono_threads_unlock ();
2924 /* Something to wait for */
2925 wait_for_tids_or_state_change (wait, INFINITE);
2927 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2928 } while(wait->num>0);
2930 /* Mono is shutting down, so just wait for the end */
2931 if (!mono_runtime_try_shutdown ()) {
2932 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
2933 mono_thread_suspend (mono_thread_internal_current ());
2934 mono_thread_execute_interruption (mono_thread_internal_current ());
2938 * Remove everything but the finalizer thread and self.
2939 * Also abort all the background threads
2942 mono_threads_lock ();
2945 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
2946 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
2947 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2949 mono_threads_unlock ();
2951 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2953 /* Something to wait for */
2954 wait_for_tids (wait, INFINITE);
2956 } while (wait->num > 0);
2959 * give the subthreads a chance to really quit (this is mainly needed
2960 * to get correct user and system times from getrusage/wait/time(1)).
2961 * This could be removed if we avoid pthread_detach() and use pthread_join().
2968 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2970 MonoInternalThread *thread=(MonoInternalThread *)value;
2972 if(thread->tid != (gsize)user) {
2973 /*TerminateThread (thread->handle, -1);*/
2977 void mono_thread_abort_all_other_threads (void)
2979 gsize self = GetCurrentThreadId ();
2981 mono_threads_lock ();
2982 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2983 mono_g_hash_table_size (threads));
2984 mono_g_hash_table_foreach (threads, print_tids, NULL));
2986 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2988 mono_threads_unlock ();
2992 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2994 MonoInternalThread *thread = (MonoInternalThread*)value;
2995 struct wait_data *wait = (struct wait_data*)user_data;
2999 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3001 * This needs no locking.
3003 if ((thread->state & ThreadState_Suspended) != 0 ||
3004 (thread->state & ThreadState_Stopped) != 0)
3007 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3008 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3012 wait->handles [wait->num] = handle;
3013 wait->threads [wait->num] = thread;
3019 * mono_thread_suspend_all_other_threads:
3021 * Suspend all managed threads except the finalizer thread and this thread. It is
3022 * not possible to resume them later.
3024 void mono_thread_suspend_all_other_threads (void)
3026 struct wait_data wait_data;
3027 struct wait_data *wait = &wait_data;
3029 gsize self = GetCurrentThreadId ();
3031 guint32 eventidx = 0;
3032 gboolean starting, finished;
3034 memset (wait, 0, sizeof (struct wait_data));
3036 * The other threads could be in an arbitrary state at this point, i.e.
3037 * they could be starting up, shutting down etc. This means that there could be
3038 * threads which are not even in the threads hash table yet.
3042 * First we set a barrier which will be checked by all threads before they
3043 * are added to the threads hash table, and they will exit if the flag is set.
3044 * This ensures that no threads could be added to the hash later.
3045 * We will use shutting_down as the barrier for now.
3047 g_assert (shutting_down);
3050 * We make multiple calls to WaitForMultipleObjects since:
3051 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3052 * - some threads could exit without becoming suspended
3057 * Make a copy of the hashtable since we can't do anything with
3058 * threads while threads_mutex is held.
3061 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3062 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3063 mono_threads_lock ();
3064 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3065 mono_threads_unlock ();
3067 events = g_new0 (gpointer, wait->num);
3069 /* Get the suspended events that we'll be waiting for */
3070 for (i = 0; i < wait->num; ++i) {
3071 MonoInternalThread *thread = wait->threads [i];
3072 gboolean signal_suspend = FALSE;
3074 if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3075 //CloseHandle (wait->handles [i]);
3076 wait->threads [i] = NULL; /* ignore this thread in next loop */
3080 ensure_synch_cs_set (thread);
3082 EnterCriticalSection (thread->synch_cs);
3084 if (thread->suspended_event == NULL) {
3085 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3086 if (thread->suspended_event == NULL) {
3087 /* Forget this one and go on to the next */
3088 LeaveCriticalSection (thread->synch_cs);
3093 if ((thread->state & ThreadState_Suspended) != 0 ||
3094 (thread->state & ThreadState_StopRequested) != 0 ||
3095 (thread->state & ThreadState_Stopped) != 0) {
3096 LeaveCriticalSection (thread->synch_cs);
3097 CloseHandle (wait->handles [i]);
3098 wait->threads [i] = NULL; /* ignore this thread in next loop */
3102 if ((thread->state & ThreadState_SuspendRequested) == 0)
3103 signal_suspend = TRUE;
3105 events [eventidx++] = thread->suspended_event;
3107 /* Convert abort requests into suspend requests */
3108 if ((thread->state & ThreadState_AbortRequested) != 0)
3109 thread->state &= ~ThreadState_AbortRequested;
3111 thread->state |= ThreadState_SuspendRequested;
3113 LeaveCriticalSection (thread->synch_cs);
3115 /* Signal the thread to suspend */
3116 if (mono_thread_info_new_interrupt_enabled ())
3117 suspend_thread_internal (thread, TRUE);
3118 else if (signal_suspend)
3119 signal_thread_state_change (thread);
3122 /*Only wait on the suspend event if we are using the old path */
3123 if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
3124 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3125 for (i = 0; i < wait->num; ++i) {
3126 MonoInternalThread *thread = wait->threads [i];
3131 ensure_synch_cs_set (thread);
3133 EnterCriticalSection (thread->synch_cs);
3134 if ((thread->state & ThreadState_Suspended) != 0) {
3135 CloseHandle (thread->suspended_event);
3136 thread->suspended_event = NULL;
3138 LeaveCriticalSection (thread->synch_cs);
3142 if (eventidx <= 0) {
3144 * If there are threads which are starting up, we wait until they
3145 * are suspended when they try to register in the threads hash.
3146 * This is guaranteed to finish, since the threads which can create new
3147 * threads get suspended after a while.
3148 * FIXME: The finalizer thread can still create new threads.
3150 mono_threads_lock ();
3151 if (threads_starting_up)
3152 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3155 mono_threads_unlock ();
3167 collect_threads (gpointer key, gpointer value, gpointer user_data)
3169 MonoInternalThread *thread = (MonoInternalThread*)value;
3170 struct wait_data *wait = (struct wait_data*)user_data;
3173 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3174 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3178 wait->handles [wait->num] = handle;
3179 wait->threads [wait->num] = thread;
3184 static gboolean thread_dump_requested;
3186 static G_GNUC_UNUSED gboolean
3187 print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3189 GString *p = (GString*)data;
3190 MonoMethod *method = NULL;
3192 method = mono_jit_info_get_method (frame->ji);
3195 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3196 g_string_append_printf (p, " %s\n", location);
3199 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
3205 print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
3207 GString* text = g_string_new (0);
3209 GError *error = NULL;
3212 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3214 g_string_append_printf (text, "\n\"%s\"", name);
3217 else if (thread->threadpool_thread)
3218 g_string_append (text, "\n\"<threadpool thread>\"");
3220 g_string_append (text, "\n\"<unnamed thread>\"");
3223 /* This no longer works with remote unwinding */
3225 wapi_desc = wapi_current_thread_desc ();
3226 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
3231 mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
3232 mono_thread_info_resume (mono_thread_info_get_tid (info));
3234 fprintf (stdout, "%s", text->str);
3236 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3237 OutputDebugStringA(text->str);
3240 g_string_free (text, TRUE);
3245 dump_thread (gpointer key, gpointer value, gpointer user)
3247 MonoInternalThread *thread = (MonoInternalThread *)value;
3248 MonoThreadInfo *info;
3250 if (thread == mono_thread_internal_current ())
3254 FIXME This still can hang if we stop a thread during malloc.
3255 FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
3256 that takes a callback and runs it with the target suspended.
3257 We probably should loop a bit around trying to get it to either managed code
3260 info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
3265 print_thread_dump (thread, info);
3269 mono_threads_perform_thread_dump (void)
3271 if (!thread_dump_requested)
3274 printf ("Full thread dump:\n");
3277 * Make a copy of the hashtable since we can't do anything with
3278 * threads while threads_mutex is held.
3280 mono_threads_lock ();
3281 mono_g_hash_table_foreach (threads, dump_thread, NULL);
3282 mono_threads_unlock ();
3284 thread_dump_requested = FALSE;
3288 * mono_threads_request_thread_dump:
3290 * Ask all threads except the current to print their stacktrace to stdout.
3293 mono_threads_request_thread_dump (void)
3295 struct wait_data wait_data;
3296 struct wait_data *wait = &wait_data;
3299 /*The new thread dump code runs out of the finalizer thread. */
3300 if (mono_thread_info_new_interrupt_enabled ()) {
3301 thread_dump_requested = TRUE;
3302 mono_gc_finalize_notify ();
3307 memset (wait, 0, sizeof (struct wait_data));
3310 * Make a copy of the hashtable since we can't do anything with
3311 * threads while threads_mutex is held.
3313 mono_threads_lock ();
3314 mono_g_hash_table_foreach (threads, collect_threads, wait);
3315 mono_threads_unlock ();
3317 for (i = 0; i < wait->num; ++i) {
3318 MonoInternalThread *thread = wait->threads [i];
3320 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3321 (thread != mono_thread_internal_current ()) &&
3322 !thread->thread_dump_requested) {
3323 thread->thread_dump_requested = TRUE;
3325 signal_thread_state_change (thread);
3328 CloseHandle (wait->handles [i]);
3334 gint allocated; /* +1 so that refs [allocated] == NULL */
3338 typedef struct ref_stack RefStack;
3341 ref_stack_new (gint initial_size)
3345 initial_size = MAX (initial_size, 16) + 1;
3346 rs = g_new0 (RefStack, 1);
3347 rs->refs = g_new0 (gpointer, initial_size);
3348 rs->allocated = initial_size;
3353 ref_stack_destroy (gpointer ptr)
3364 ref_stack_push (RefStack *rs, gpointer ptr)
3366 g_assert (rs != NULL);
3368 if (rs->bottom >= rs->allocated) {
3369 rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3370 rs->allocated <<= 1;
3371 rs->refs [rs->allocated] = NULL;
3373 rs->refs [rs->bottom++] = ptr;
3377 ref_stack_pop (RefStack *rs)
3379 if (rs == NULL || rs->bottom == 0)
3383 rs->refs [rs->bottom] = NULL;
3387 ref_stack_find (RefStack *rs, gpointer ptr)
3394 for (refs = rs->refs; refs && *refs; refs++) {
3402 * mono_thread_push_appdomain_ref:
3404 * Register that the current thread may have references to objects in domain
3405 * @domain on its stack. Each call to this function should be paired with a
3406 * call to pop_appdomain_ref.
3409 mono_thread_push_appdomain_ref (MonoDomain *domain)
3411 MonoInternalThread *thread = mono_thread_internal_current ();
3414 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3415 SPIN_LOCK (thread->lock_thread_id);
3416 if (thread->appdomain_refs == NULL)
3417 thread->appdomain_refs = ref_stack_new (16);
3418 ref_stack_push (thread->appdomain_refs, domain);
3419 SPIN_UNLOCK (thread->lock_thread_id);
3424 mono_thread_pop_appdomain_ref (void)
3426 MonoInternalThread *thread = mono_thread_internal_current ();
3429 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3430 SPIN_LOCK (thread->lock_thread_id);
3431 ref_stack_pop (thread->appdomain_refs);
3432 SPIN_UNLOCK (thread->lock_thread_id);
3437 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3440 SPIN_LOCK (thread->lock_thread_id);
3441 res = ref_stack_find (thread->appdomain_refs, domain);
3442 SPIN_UNLOCK (thread->lock_thread_id);
3447 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3449 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3452 typedef struct abort_appdomain_data {
3453 struct wait_data wait;
3455 } abort_appdomain_data;
3458 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3460 MonoInternalThread *thread = (MonoInternalThread*)value;
3461 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3462 MonoDomain *domain = data->domain;
3464 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3465 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3467 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3468 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3471 data->wait.handles [data->wait.num] = handle;
3472 data->wait.threads [data->wait.num] = thread;
3475 /* Just ignore the rest, we can't do anything with
3483 * mono_threads_abort_appdomain_threads:
3485 * Abort threads which has references to the given appdomain.
3488 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3490 #ifdef __native_client__
3494 abort_appdomain_data user_data;
3496 int orig_timeout = timeout;
3499 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3501 start_time = mono_msec_ticks ();
3503 mono_threads_lock ();
3505 user_data.domain = domain;
3506 user_data.wait.num = 0;
3507 /* This shouldn't take any locks */
3508 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3509 mono_threads_unlock ();
3511 if (user_data.wait.num > 0) {
3512 /* Abort the threads outside the threads lock */
3513 for (i = 0; i < user_data.wait.num; ++i)
3514 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3517 * We should wait for the threads either to abort, or to leave the
3518 * domain. We can't do the latter, so we wait with a timeout.
3520 wait_for_tids (&user_data.wait, 100);
3523 /* Update remaining time */
3524 timeout -= mono_msec_ticks () - start_time;
3525 start_time = mono_msec_ticks ();
3527 if (orig_timeout != -1 && timeout < 0)
3530 while (user_data.wait.num > 0);
3532 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3538 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3540 MonoInternalThread *thread = (MonoInternalThread*)value;
3541 MonoDomain *domain = (MonoDomain*)user_data;
3544 /* No locking needed here */
3545 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3547 if (thread->cached_culture_info) {
3548 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3549 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3550 if (obj && obj->vtable->domain == domain)
3551 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3557 * mono_threads_clear_cached_culture:
3559 * Clear the cached_current_culture from all threads if it is in the
3563 mono_threads_clear_cached_culture (MonoDomain *domain)
3565 mono_threads_lock ();
3566 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3567 mono_threads_unlock ();
3571 * mono_thread_get_undeniable_exception:
3573 * Return an exception which needs to be raised when leaving a catch clause.
3574 * This is used for undeniable exception propagation.
3577 mono_thread_get_undeniable_exception (void)
3579 MonoInternalThread *thread = mono_thread_internal_current ();
3581 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3583 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3584 * exception if the thread no longer references a dying appdomain.
3586 thread->abort_exc->trace_ips = NULL;
3587 thread->abort_exc->stack_trace = NULL;
3588 return thread->abort_exc;
3594 #if MONO_SMALL_CONFIG
3595 #define NUM_STATIC_DATA_IDX 4
3596 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3600 #define NUM_STATIC_DATA_IDX 8
3601 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3602 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3606 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3609 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3612 gpointer *static_data = addr;
3613 for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3616 if (!static_data [i])
3618 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3619 ptr = static_data [i];
3620 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3621 uintptr_t bmap = static_reference_bitmaps [i][j];
3624 if ((bmap & 1) && *p) {
3635 * mono_alloc_static_data
3637 * Allocate memory blocks for storing threads or context static data
3640 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3642 guint idx = (offset >> 24) - 1;
3645 gpointer* static_data = *static_data_ptr;
3647 static void* tls_desc = NULL;
3648 if (mono_gc_user_markers_supported () && !tls_desc)
3649 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3650 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3651 *static_data_ptr = static_data;
3652 static_data [0] = static_data;
3655 for (i = 1; i <= idx; ++i) {
3656 if (static_data [i])
3658 if (mono_gc_user_markers_supported () && threadlocal)
3659 static_data [i] = g_malloc0 (static_data_size [i]);
3661 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3666 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3669 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3670 gpointer p = static_data [i];
3674 * At this point, the static data pointer array is still registered with the
3675 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3676 * data. Freeing the individual arrays without first nulling their slots
3677 * would make it possible for mark_tls_slots() to encounter a pointer to
3678 * such an already freed array. See bug #13813.
3680 static_data [i] = NULL;
3681 mono_memory_write_barrier ();
3682 if (mono_gc_user_markers_supported () && threadlocal)
3685 mono_gc_free_fixed (p);
3687 mono_gc_free_fixed (static_data);
3691 * mono_init_static_data_info
3693 * Initializes static data counters
3695 static void mono_init_static_data_info (StaticDataInfo *static_data)
3697 static_data->idx = 0;
3698 static_data->offset = 0;
3699 static_data->freelist = NULL;
3703 * mono_alloc_static_data_slot
3705 * Generates an offset for static data. static_data contains the counters
3706 * used to generate it.
3709 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3713 if (!static_data->idx && !static_data->offset) {
3715 * we use the first chunk of the first allocation also as
3716 * an array for the rest of the data
3718 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3720 static_data->offset += align - 1;
3721 static_data->offset &= ~(align - 1);
3722 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3723 static_data->idx ++;
3724 g_assert (size <= static_data_size [static_data->idx]);
3725 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3726 static_data->offset = 0;
3728 offset = static_data->offset | ((static_data->idx + 1) << 24);
3729 static_data->offset += size;
3734 * ensure thread static fields already allocated are valid for thread
3735 * This function is called when a thread is created or on thread attach.
3738 thread_adjust_static_data (MonoInternalThread *thread)
3742 mono_threads_lock ();
3743 if (thread_static_info.offset || thread_static_info.idx > 0) {
3744 /* get the current allocated size */
3745 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3746 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3748 mono_threads_unlock ();
3752 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3754 MonoInternalThread *thread = value;
3755 guint32 offset = GPOINTER_TO_UINT (user);
3757 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3760 static MonoThreadDomainTls*
3761 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3763 MonoThreadDomainTls* prev = NULL;
3764 MonoThreadDomainTls* tmp = static_data->freelist;
3766 if (tmp->size == size) {
3768 prev->next = tmp->next;
3770 static_data->freelist = tmp->next;
3779 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
3782 int idx = (offset >> 24) - 1;
3784 if (!static_reference_bitmaps [idx])
3785 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3786 rb = static_reference_bitmaps [idx];
3788 offset /= sizeof (gpointer);
3789 /* offset is now the bitmap offset */
3790 for (i = 0; i < numbits; ++i) {
3791 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3792 rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3797 clear_reference_bitmap (guint32 offset, guint32 size)
3799 int idx = (offset >> 24) - 1;
3801 rb = static_reference_bitmaps [idx];
3803 offset /= sizeof (gpointer);
3804 size /= sizeof (gpointer);
3806 /* offset is now the bitmap offset */
3807 for (; offset < size; ++offset)
3808 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3812 * The offset for a special static variable is composed of three parts:
3813 * a bit that indicates the type of static data (0:thread, 1:context),
3814 * an index in the array of chunks of memory for the thread (thread->static_data)
3815 * and an offset in that chunk of mem. This allows allocating less memory in the
3820 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
3823 if (static_type == SPECIAL_STATIC_THREAD) {
3824 MonoThreadDomainTls *item;
3825 mono_threads_lock ();
3826 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3827 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3829 offset = item->offset;
3832 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3834 update_tls_reference_bitmap (offset, bitmap, numbits);
3835 /* This can be called during startup */
3836 if (threads != NULL)
3837 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3838 mono_threads_unlock ();
3840 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3841 mono_contexts_lock ();
3842 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3843 mono_contexts_unlock ();
3844 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3850 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
3852 /* The high bit means either thread (0) or static (1) data. */
3854 guint32 static_type = (offset & 0x80000000);
3857 offset &= 0x7fffffff;
3858 idx = (offset >> 24) - 1;
3860 if (static_type == 0) {
3861 return get_thread_static_data (thread, offset);
3863 /* Allocate static data block under demand, since we don't have a list
3866 MonoAppContext *context = mono_context_get ();
3867 if (!context->static_data || !context->static_data [idx]) {
3868 mono_contexts_lock ();
3869 mono_alloc_static_data (&(context->static_data), offset, FALSE);
3870 mono_contexts_unlock ();
3872 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3877 mono_get_special_static_data (guint32 offset)
3879 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
3888 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3890 MonoInternalThread *thread = value;
3891 TlsOffsetSize *data = user;
3892 int idx = (data->offset >> 24) - 1;
3895 if (!thread->static_data || !thread->static_data [idx])
3897 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3898 mono_gc_bzero (ptr, data->size);
3902 do_free_special_slot (guint32 offset, guint32 size)
3904 guint32 static_type = (offset & 0x80000000);
3905 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3906 if (static_type == 0) {
3908 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3909 data.offset = offset & 0x7fffffff;
3911 clear_reference_bitmap (data.offset, data.size);
3912 if (threads != NULL)
3913 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3914 item->offset = offset;
3917 if (!mono_runtime_is_shutting_down ()) {
3918 item->next = thread_static_info.freelist;
3919 thread_static_info.freelist = item;
3921 /* We could be called during shutdown after mono_thread_cleanup () is called */
3925 /* FIXME: free context static data as well */
3930 do_free_special (gpointer key, gpointer value, gpointer data)
3932 MonoClassField *field = key;
3933 guint32 offset = GPOINTER_TO_UINT (value);
3936 size = mono_type_size (field->type, &align);
3937 do_free_special_slot (offset, size);
3941 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3943 mono_threads_lock ();
3944 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3945 mono_threads_unlock ();
3949 mono_special_static_data_free_slot (guint32 offset, guint32 size)
3951 mono_threads_lock ();
3952 do_free_special_slot (offset, size);
3953 mono_threads_unlock ();
3957 * allocates room in the thread local area for storing an instance of the struct type
3958 * the allocation is kept track of in domain->tlsrec_list.
3961 mono_thread_alloc_tls (MonoReflectionType *type)
3963 MonoDomain *domain = mono_domain_get ();
3965 MonoTlsDataRecord *tlsrec;
3968 gsize default_bitmap [4] = {0};
3969 uint32_t tls_offset;
3973 klass = mono_class_from_mono_type (type->type);
3974 /* TlsDatum is a struct, so we subtract the object header size offset */
3975 bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
3976 size = mono_type_size (type->type, &align);
3977 tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set + 1);
3978 if (bitmap != default_bitmap)
3980 tlsrec = g_new0 (MonoTlsDataRecord, 1);
3981 tlsrec->tls_offset = tls_offset;
3982 tlsrec->size = size;
3983 mono_domain_lock (domain);
3984 tlsrec->next = domain->tlsrec_list;
3985 domain->tlsrec_list = tlsrec;
3986 mono_domain_unlock (domain);
3991 mono_thread_destroy_tls (uint32_t tls_offset)
3993 MonoTlsDataRecord *prev = NULL;
3994 MonoTlsDataRecord *cur;
3996 MonoDomain *domain = mono_domain_get ();
3997 mono_domain_lock (domain);
3998 cur = domain->tlsrec_list;
4000 if (cur->tls_offset == tls_offset) {
4002 prev->next = cur->next;
4004 domain->tlsrec_list = cur->next;
4012 mono_domain_unlock (domain);
4014 mono_special_static_data_free_slot (tls_offset, size);
4018 * This is just to ensure cleanup: the finalizers should have taken care, so this is not perf-critical.
4021 mono_thread_destroy_domain_tls (MonoDomain *domain)
4023 while (domain->tlsrec_list)
4024 mono_thread_destroy_tls (domain->tlsrec_list->tls_offset);
4027 static MonoClassField *local_slots = NULL;
4030 /* local tls data to get locals_slot from a thread */
4033 /* index in the locals_slot array */
4038 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
4040 LocalSlotID *sid = user_data;
4041 MonoInternalThread *thread = (MonoInternalThread*)value;
4042 MonoArray *slots_array;
4044 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
4045 * it is for the right domain, so we need to check if it is allocated an initialized
4046 * for the current thread.
4048 /*g_print ("handling thread %p\n", thread);*/
4049 if (!thread->static_data || !thread->static_data [sid->idx])
4051 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
4052 if (!slots_array || sid->slot >= mono_array_length (slots_array))
4054 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
4058 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
4066 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
4068 g_warning ("local_slots field not found in Thread class");
4072 domain = mono_domain_get ();
4073 mono_domain_lock (domain);
4074 if (domain->special_static_fields)
4075 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
4076 mono_domain_unlock (domain);
4079 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
4080 sid.offset = GPOINTER_TO_UINT (addr);
4081 sid.offset &= 0x7fffffff;
4082 sid.idx = (sid.offset >> 24) - 1;
4083 mono_threads_lock ();
4084 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
4085 mono_threads_unlock ();
4087 /* FIXME: clear the slot for MonoAppContexts, too */
4092 static void CALLBACK dummy_apc (ULONG_PTR param)
4096 static guint32 dummy_apc (gpointer param)
4103 * mono_thread_execute_interruption
4105 * Performs the operation that the requested thread state requires (abort,
4108 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
4110 ensure_synch_cs_set (thread);
4112 EnterCriticalSection (thread->synch_cs);
4114 /* MonoThread::interruption_requested can only be changed with atomics */
4115 if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4116 /* this will consume pending APC calls */
4117 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4118 InterlockedDecrement (&thread_interruption_requested);
4120 /* Clear the interrupted flag of the thread so it can wait again */
4121 wapi_clear_interruption ();
4125 if ((thread->state & ThreadState_AbortRequested) != 0) {
4126 LeaveCriticalSection (thread->synch_cs);
4127 if (thread->abort_exc == NULL) {
4129 * This might be racy, but it has to be called outside the lock
4130 * since it calls managed code.
4132 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4134 return thread->abort_exc;
4136 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4137 self_suspend_internal (thread);
4140 else if ((thread->state & ThreadState_StopRequested) != 0) {
4141 /* FIXME: do this through the JIT? */
4143 LeaveCriticalSection (thread->synch_cs);
4145 mono_thread_exit ();
4147 } else if (thread->pending_exception) {
4150 exc = thread->pending_exception;
4151 thread->pending_exception = NULL;
4153 LeaveCriticalSection (thread->synch_cs);
4155 } else if (thread->thread_interrupt_requested) {
4157 thread->thread_interrupt_requested = FALSE;
4158 LeaveCriticalSection (thread->synch_cs);
4160 return(mono_get_exception_thread_interrupted ());
4163 LeaveCriticalSection (thread->synch_cs);
4169 * mono_thread_request_interruption
4171 * A signal handler can call this method to request the interruption of a
4172 * thread. The result of the interruption will depend on the current state of
4173 * the thread. If the result is an exception that needs to be throw, it is
4174 * provided as return value.
4177 mono_thread_request_interruption (gboolean running_managed)
4179 MonoInternalThread *thread = mono_thread_internal_current ();
4181 /* The thread may already be stopping */
4186 if (thread->interrupt_on_stop &&
4187 thread->state & ThreadState_StopRequested &&
4188 thread->state & ThreadState_Background)
4192 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4194 InterlockedIncrement (&thread_interruption_requested);
4196 if (!running_managed || is_running_protected_wrapper ()) {
4197 /* Can't stop while in unmanaged code. Increase the global interruption
4198 request count. When exiting the unmanaged method the count will be
4199 checked and the thread will be interrupted. */
4202 if (mono_thread_notify_pending_exc_fn && !running_managed)
4203 /* The JIT will notify the thread about the interruption */
4204 /* This shouldn't take any locks */
4205 mono_thread_notify_pending_exc_fn ();
4207 /* this will awake the thread if it is in WaitForSingleObject
4209 /* Our implementation of this function ignores the func argument */
4210 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4214 return mono_thread_execute_interruption (thread);
4218 /*This function should be called by a thread after it has exited all of
4219 * its handle blocks at interruption time.*/
4221 mono_thread_resume_interruption (void)
4223 MonoInternalThread *thread = mono_thread_internal_current ();
4224 gboolean still_aborting;
4226 /* The thread may already be stopping */
4230 ensure_synch_cs_set (thread);
4231 EnterCriticalSection (thread->synch_cs);
4232 still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4233 LeaveCriticalSection (thread->synch_cs);
4235 /*This can happen if the protected block called Thread::ResetAbort*/
4236 if (!still_aborting)
4239 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4241 InterlockedIncrement (&thread_interruption_requested);
4244 wapi_self_interrupt ();
4246 return mono_thread_execute_interruption (thread);
4249 gboolean mono_thread_interruption_requested ()
4251 if (thread_interruption_requested) {
4252 MonoInternalThread *thread = mono_thread_internal_current ();
4253 /* The thread may already be stopping */
4255 return (thread->interruption_requested);
4260 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4262 MonoInternalThread *thread = mono_thread_internal_current ();
4264 /* The thread may already be stopping */
4268 mono_debugger_check_interruption ();
4270 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4271 MonoException* exc = mono_thread_execute_interruption (thread);
4272 if (exc) mono_raise_exception (exc);
4277 * Performs the interruption of the current thread, if one has been requested,
4278 * and the thread is not running a protected wrapper.
4280 void mono_thread_interruption_checkpoint ()
4282 mono_thread_interruption_checkpoint_request (FALSE);
4286 * Performs the interruption of the current thread, if one has been requested.
4288 void mono_thread_force_interruption_checkpoint ()
4290 mono_thread_interruption_checkpoint_request (TRUE);
4294 * mono_thread_get_and_clear_pending_exception:
4296 * Return any pending exceptions for the current thread and clear it as a side effect.
4299 mono_thread_get_and_clear_pending_exception (void)
4301 MonoInternalThread *thread = mono_thread_internal_current ();
4303 /* The thread may already be stopping */
4307 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4308 return mono_thread_execute_interruption (thread);
4311 if (thread->pending_exception) {
4312 MonoException *exc = thread->pending_exception;
4314 thread->pending_exception = NULL;
4322 * mono_set_pending_exception:
4324 * Set the pending exception of the current thread to EXC.
4325 * The exception will be thrown when execution returns to managed code.
4328 mono_set_pending_exception (MonoException *exc)
4330 MonoInternalThread *thread = mono_thread_internal_current ();
4332 /* The thread may already be stopping */
4336 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4338 mono_thread_request_interruption (FALSE);
4342 * mono_thread_interruption_request_flag:
4344 * Returns the address of a flag that will be non-zero if an interruption has
4345 * been requested for a thread. The thread to interrupt may not be the current
4346 * thread, so an additional call to mono_thread_interruption_requested() or
4347 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4350 gint32* mono_thread_interruption_request_flag ()
4352 return &thread_interruption_requested;
4356 mono_thread_init_apartment_state (void)
4359 MonoInternalThread* thread = mono_thread_internal_current ();
4361 /* Positive return value indicates success, either
4362 * S_OK if this is first CoInitialize call, or
4363 * S_FALSE if CoInitialize already called, but with same
4364 * threading model. A negative value indicates failure,
4365 * probably due to trying to change the threading model.
4367 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4368 ? COINIT_APARTMENTTHREADED
4369 : COINIT_MULTITHREADED) < 0) {
4370 thread->apartment_state = ThreadApartmentState_Unknown;
4376 mono_thread_cleanup_apartment_state (void)
4379 MonoInternalThread* thread = mono_thread_internal_current ();
4381 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4388 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4390 ensure_synch_cs_set (thread);
4392 EnterCriticalSection (thread->synch_cs);
4393 thread->state |= state;
4394 LeaveCriticalSection (thread->synch_cs);
4398 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4400 ensure_synch_cs_set (thread);
4402 EnterCriticalSection (thread->synch_cs);
4403 thread->state &= ~state;
4404 LeaveCriticalSection (thread->synch_cs);
4408 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4410 gboolean ret = FALSE;
4412 ensure_synch_cs_set (thread);
4414 EnterCriticalSection (thread->synch_cs);
4416 if ((thread->state & test) != 0) {
4420 LeaveCriticalSection (thread->synch_cs);
4425 //static MonoClassField *execution_context_field;
4428 get_execution_context_addr (void)
4430 MonoDomain *domain = mono_domain_get ();
4431 guint32 offset = domain->execution_context_field_offset;
4434 MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
4437 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4439 mono_domain_lock (domain);
4440 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
4441 mono_domain_unlock (domain);
4444 domain->execution_context_field_offset = offset;
4447 return (MonoObject**) mono_get_special_static_data (offset);
4451 mono_thread_get_execution_context (void)
4453 return *get_execution_context_addr ();
4457 mono_thread_set_execution_context (MonoObject *ec)
4459 *get_execution_context_addr () = ec;
4462 static gboolean has_tls_get = FALSE;
4465 mono_runtime_set_has_tls_get (gboolean val)
4471 mono_runtime_has_tls_get (void)
4477 mono_thread_kill (MonoInternalThread *thread, int signal)
4479 #ifdef __native_client__
4480 /* Workaround pthread_kill abort() in NaCl glibc. */
4484 /* Win32 uses QueueUserAPC and callers of this are guarded */
4485 g_assert_not_reached ();
4487 # ifdef PTHREAD_POINTER_ID
4488 return pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
4490 # ifdef PLATFORM_ANDROID
4491 if (thread->android_tid != 0) {
4493 int old_errno = errno;
4495 ret = tkill ((pid_t) thread->android_tid, signal);
4504 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4506 return pthread_kill (thread->tid, mono_thread_get_abort_signal ());
4513 self_interrupt_thread (void *_unused)
4515 MonoThreadInfo *info = mono_thread_info_current ();
4516 MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
4517 if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4518 mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
4519 g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4523 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4527 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4531 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4533 MonoJitInfo **dest = data;
4539 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4541 MonoJitInfo *ji = NULL;
4544 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
4549 abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
4552 MonoThreadInfo *info = NULL;
4553 gboolean protected_wrapper;
4554 gboolean running_managed;
4556 if (!mono_thread_info_new_interrupt_enabled ()) {
4557 signal_thread_state_change (thread);
4562 FIXME this is insanely broken, it doesn't cause interruption to happen
4563 synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
4565 if (thread == mono_thread_internal_current ()) {
4566 /* Do it synchronously */
4567 MonoException *exc = mono_thread_request_interruption (can_raise_exception);
4569 mono_raise_exception (exc);
4571 wapi_interrupt_thread (thread->handle);
4576 /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
4577 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
4581 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
4582 mono_thread_info_resume (mono_thread_info_get_tid (info));
4586 /*someone is already interrupting it*/
4587 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
4588 mono_thread_info_resume (mono_thread_info_get_tid (info));
4591 InterlockedIncrement (&thread_interruption_requested);
4593 ji = mono_thread_info_get_last_managed (info);
4594 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4595 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4597 if (!protected_wrapper && running_managed) {
4598 /*We are in managed code*/
4599 /*Set the thread to call */
4600 if (install_async_abort)
4601 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4602 mono_thread_info_resume (mono_thread_info_get_tid (info));
4604 gpointer interrupt_handle;
4606 * This will cause waits to be broken.
4607 * It will also prevent the thread from entering a wait, so if the thread returns
4608 * from the wait before it receives the abort signal, it will just spin in the wait
4609 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4613 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4615 mono_thread_info_resume (mono_thread_info_get_tid (info));
4617 wapi_finish_interrupt_thread (interrupt_handle);
4620 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4624 transition_to_suspended (MonoInternalThread *thread)
4626 if ((thread->state & ThreadState_SuspendRequested) == 0) {
4627 g_assert (0); /*FIXME we should not reach this */
4628 /*Make sure we balance the suspend count.*/
4629 mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
4631 thread->state &= ~ThreadState_SuspendRequested;
4632 thread->state |= ThreadState_Suspended;
4633 mono_thread_info_finish_suspend ();
4635 LeaveCriticalSection (thread->synch_cs);
4639 suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
4641 if (!mono_thread_info_new_interrupt_enabled ()) {
4642 signal_thread_state_change (thread);
4646 EnterCriticalSection (thread->synch_cs);
4647 if (thread == mono_thread_internal_current ()) {
4648 transition_to_suspended (thread);
4649 mono_thread_info_self_suspend ();
4651 MonoThreadInfo *info;
4653 gboolean protected_wrapper;
4654 gboolean running_managed;
4656 /*A null info usually means the thread is already dead. */
4657 if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt))) {
4658 LeaveCriticalSection (thread->synch_cs);
4662 ji = mono_thread_info_get_last_managed (info);
4663 protected_wrapper = ji && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4664 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
4666 if (running_managed && !protected_wrapper) {
4667 transition_to_suspended (thread);
4669 gpointer interrupt_handle;
4671 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4672 InterlockedIncrement (&thread_interruption_requested);
4675 interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
4677 mono_thread_info_resume (mono_thread_info_get_tid (info));
4680 wapi_finish_interrupt_thread (interrupt_handle);
4682 LeaveCriticalSection (thread->synch_cs);
4687 /*This is called with @thread synch_cs held and it must release it*/
4689 self_suspend_internal (MonoInternalThread *thread)
4691 if (!mono_thread_info_new_interrupt_enabled ()) {
4692 thread->state &= ~ThreadState_SuspendRequested;
4693 thread->state |= ThreadState_Suspended;
4694 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4695 if (thread->suspend_event == NULL) {
4696 LeaveCriticalSection (thread->synch_cs);
4699 if (thread->suspended_event)
4700 SetEvent (thread->suspended_event);
4702 LeaveCriticalSection (thread->synch_cs);
4704 if (shutting_down) {
4705 /* After we left the lock, the runtime might shut down so everything becomes invalid */
4710 WaitForSingleObject (thread->suspend_event, INFINITE);
4712 EnterCriticalSection (thread->synch_cs);
4714 CloseHandle (thread->suspend_event);
4715 thread->suspend_event = NULL;
4716 thread->state &= ~ThreadState_Suspended;
4718 /* The thread that requested the resume will have replaced this event
4719 * and will be waiting for it
4721 SetEvent (thread->resume_event);
4723 LeaveCriticalSection (thread->synch_cs);
4727 transition_to_suspended (thread);
4728 mono_thread_info_self_suspend ();
4731 /*This is called with @thread synch_cs held and it must release it*/
4733 resume_thread_internal (MonoInternalThread *thread)
4735 if (!mono_thread_info_new_interrupt_enabled ()) {
4736 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
4737 if (thread->resume_event == NULL) {
4738 LeaveCriticalSection (thread->synch_cs);
4742 /* Awake the thread */
4743 SetEvent (thread->suspend_event);
4745 LeaveCriticalSection (thread->synch_cs);
4747 /* Wait for the thread to awake */
4748 WaitForSingleObject (thread->resume_event, INFINITE);
4749 CloseHandle (thread->resume_event);
4750 thread->resume_event = NULL;
4754 LeaveCriticalSection (thread->synch_cs);
4755 /* Awake the thread */
4756 if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
4758 EnterCriticalSection (thread->synch_cs);
4759 thread->state &= ~ThreadState_Suspended;
4760 LeaveCriticalSection (thread->synch_cs);
4766 * mono_thread_is_foreign:
4767 * @thread: the thread to query
4769 * This function allows one to determine if a thread was created by the mono runtime and has
4770 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4772 * Returns: true if @thread was not created by the runtime.
4775 mono_thread_is_foreign (MonoThread *thread)
4777 MonoThreadInfo *info = thread->internal_thread->thread_info;
4778 return info->runtime_thread == FALSE;