2 * threads.c: Thread support internal calls
5 * Dick Porter (dick@ximian.com)
6 * Paolo Molaro (lupus@ximian.com)
7 * Patrik Torstensson (patrik.torstensson@labs2.com)
9 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
11 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
20 #include <mono/metadata/object.h>
21 #include <mono/metadata/domain-internals.h>
22 #include <mono/metadata/profiler-private.h>
23 #include <mono/metadata/threads.h>
24 #include <mono/metadata/threads-types.h>
25 #include <mono/metadata/exception.h>
26 #include <mono/metadata/environment.h>
27 #include <mono/metadata/monitor.h>
28 #include <mono/metadata/gc-internals.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/metadata/runtime.h>
31 #include <mono/metadata/object-internals.h>
32 #include <mono/metadata/debug-internals.h>
33 #include <mono/utils/monobitset.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/mono-threads-coop.h>
40 #include <mono/utils/hazard-pointer.h>
41 #include <mono/utils/mono-tls.h>
42 #include <mono/utils/atomic.h>
43 #include <mono/utils/mono-memory-model.h>
44 #include <mono/utils/mono-error-internals.h>
45 #include <mono/utils/os-event.h>
46 #include <mono/utils/mono-threads-debug.h>
47 #include <mono/metadata/w32handle.h>
48 #include <mono/metadata/w32event.h>
49 #include <mono/metadata/w32mutex.h>
51 #include <mono/metadata/reflection-internals.h>
52 #include <mono/metadata/abi-details.h>
53 #include <mono/metadata/w32error.h>
54 #include <mono/utils/w32api.h>
60 #if defined(HOST_WIN32)
64 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
65 #define USE_TKILL_ON_ANDROID 1
68 #ifdef PLATFORM_ANDROID
71 #ifdef USE_TKILL_ON_ANDROID
72 extern int tkill (pid_t tid, int signal);
76 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
77 #define THREAD_DEBUG(a)
78 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
79 #define THREAD_WAIT_DEBUG(a)
80 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
81 #define LIBGC_DEBUG(a)
83 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
84 #define SPIN_LOCK(i) do { \
85 if (SPIN_TRYLOCK (i)) \
89 #define SPIN_UNLOCK(i) i = 0
91 #define LOCK_THREAD(thread) lock_thread((thread))
92 #define UNLOCK_THREAD(thread) unlock_thread((thread))
104 typedef struct _StaticDataFreeList StaticDataFreeList;
105 struct _StaticDataFreeList {
106 StaticDataFreeList *next;
114 StaticDataFreeList *freelist;
117 /* Controls access to the 'threads' hash table */
118 static void mono_threads_lock (void);
119 static void mono_threads_unlock (void);
120 static MonoCoopMutex threads_mutex;
122 /* Controls access to the 'joinable_threads' hash table */
123 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
124 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
125 static mono_mutex_t joinable_threads_mutex;
127 /* Holds current status of static data heap */
128 static StaticDataInfo thread_static_info;
129 static StaticDataInfo context_static_info;
131 /* The hash of existing threads (key is thread ID, value is
132 * MonoInternalThread*) that need joining before exit
134 static MonoGHashTable *threads=NULL;
136 /* List of app context GC handles.
137 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
139 static GHashTable *contexts = NULL;
141 /* Cleanup queue for contexts. */
142 static MonoReferenceQueue *context_queue;
145 * Threads which are starting up and they are not in the 'threads' hash yet.
146 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
147 * Protected by mono_threads_lock ().
149 static MonoGHashTable *threads_starting_up = NULL;
152 /* Protected by the threads lock */
153 static GHashTable *joinable_threads;
154 static int joinable_thread_count;
156 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
157 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
159 /* function called at thread start */
160 static MonoThreadStartCB mono_thread_start_cb = NULL;
162 /* function called at thread attach */
163 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
165 /* function called at thread cleanup */
166 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
168 /* The default stack size for each thread */
169 static guint32 default_stacksize = 0;
170 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
172 static void context_adjust_static_data (MonoAppContext *ctx);
173 static void mono_free_static_data (gpointer* static_data);
174 static void mono_init_static_data_info (StaticDataInfo *static_data);
175 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
176 static gboolean mono_thread_resume (MonoInternalThread* thread);
177 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
178 static void self_abort_internal (MonoError *error);
179 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
180 static void self_suspend_internal (void);
182 static MonoException* mono_thread_execute_interruption (void);
183 static void ref_stack_destroy (gpointer rs);
185 /* Spin lock for InterlockedXXX 64 bit functions */
186 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
187 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
188 static mono_mutex_t interlocked_mutex;
190 /* global count of thread interruptions requested */
191 static gint32 thread_interruption_requested = 0;
193 /* Event signaled when a thread changes its background mode */
194 static MonoOSEvent background_change_event;
196 static gboolean shutting_down = FALSE;
198 static gint32 managed_thread_id_counter = 0;
200 /* Class lazy loading functions */
201 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
204 mono_threads_lock (void)
206 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
210 mono_threads_unlock (void)
212 mono_locks_coop_release (&threads_mutex, ThreadsLock);
217 get_next_managed_thread_id (void)
219 return InterlockedIncrement (&managed_thread_id_counter);
223 INTERRUPT_REQUESTED_BIT = 0x1,
224 INTERRUPT_REQUEST_DEFERRED_BIT = 0x2,
225 ABORT_PROT_BLOCK_SHIFT = 2,
226 ABORT_PROT_BLOCK_BITS = 8,
227 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
231 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
233 gsize state = thread->thread_state;
234 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
238 verify_thread_state (gsize state)
240 //can't have both INTERRUPT_REQUESTED_BIT and INTERRUPT_REQUEST_DEFERRED_BIT set at the same time
241 g_assert ((state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) != (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT));
243 //XXX This would be nice to be true, but can happen due to self-aborts (and possibly set-pending-exception)
244 //if prot_count > 0, INTERRUPT_REQUESTED_BIT must never be set
245 // int prot_count = (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
246 // g_assert (!(prot_count > 0 && (state & INTERRUPT_REQUESTED_BIT)));
250 mono_threads_begin_abort_protected_block (void)
252 MonoInternalThread *thread = mono_thread_internal_current ();
253 gsize old_state, new_state;
255 old_state = thread->thread_state;
256 verify_thread_state (old_state);
258 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
261 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) {
262 if (old_state & INTERRUPT_REQUESTED_BIT)
263 printf ("begin prot happy as it demoted interrupt to deferred interrupt\n");
264 new_state |= INTERRUPT_REQUEST_DEFERRED_BIT;
267 //bounds check abort_prot_count
268 g_assert (new_val > 0);
269 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
270 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
272 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
276 mono_threads_end_abort_protected_block (void)
278 MonoInternalThread *thread = mono_thread_internal_current ();
279 gsize old_state, new_state;
281 old_state = thread->thread_state;
282 verify_thread_state (old_state);
284 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
287 if ((old_state & INTERRUPT_REQUEST_DEFERRED_BIT) && new_val == 0) {
288 printf ("end abort on alert, promoted deferred to pront interrupt\n");
289 new_state |= INTERRUPT_REQUESTED_BIT;
292 //bounds check abort_prot_count
293 g_assert (new_val >= 0);
294 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
295 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
297 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
298 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
302 //Don't use this function, use inc/dec below
304 mono_thread_abort_prot_block_count_add (MonoInternalThread *thread, int val)
306 gsize old_state, new_state;
308 old_state = thread->thread_state;
309 verify_thread_state (old_state);
311 int new_val = val + ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
312 //bounds check abort_prot_count
313 g_assert (new_val >= 0);
314 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
315 new_state = (old_state & ~ABORT_PROT_BLOCK_MASK) | (new_val << ABORT_PROT_BLOCK_SHIFT);
317 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
321 mono_thread_inc_abort_prot_block_count (MonoInternalThread *thread)
323 mono_thread_abort_prot_block_count_add (thread, 1);
327 mono_thread_dec_abort_prot_block_count (MonoInternalThread *thread)
329 mono_thread_abort_prot_block_count_add (thread, -1);
333 mono_thread_get_interruption_requested (MonoInternalThread *thread)
335 gsize state = thread->thread_state;
336 return (state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
339 /* Returns TRUE is there was a state change */
341 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
343 gsize old_state, new_state;
345 old_state = thread->thread_state;
346 verify_thread_state (old_state);
349 if (!(old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)))
351 new_state = old_state & ~(INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT);
352 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
356 /* Returns TRUE is there was a state change */
358 mono_thread_set_interruption_requested (MonoInternalThread *thread)
360 //always force when the current thread is doing it to itself.
361 gboolean force_interrupt = thread == mono_thread_internal_current ();
362 gsize old_state, new_state;
364 old_state = thread->thread_state;
365 verify_thread_state (old_state);
367 int prot_count = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
369 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT))
372 //If there's an outstanding prot block, we queue it
373 if (prot_count && !force_interrupt) {
374 printf ("set interrupt unhappy, as it's only putting a deferred req %d\n", force_interrupt);
375 new_state = old_state | INTERRUPT_REQUEST_DEFERRED_BIT;
377 new_state = old_state | INTERRUPT_REQUESTED_BIT;
378 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
380 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
383 static inline MonoNativeThreadId
384 thread_get_tid (MonoInternalThread *thread)
386 /* We store the tid as a guint64 to keep the object layout constant between platforms */
387 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
390 static void ensure_synch_cs_set (MonoInternalThread *thread)
392 MonoCoopMutex *synch_cs;
394 if (thread->synch_cs != NULL) {
398 synch_cs = g_new0 (MonoCoopMutex, 1);
399 mono_coop_mutex_init_recursive (synch_cs);
401 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
402 synch_cs, NULL) != NULL) {
403 /* Another thread must have installed this CS */
404 mono_coop_mutex_destroy (synch_cs);
410 lock_thread (MonoInternalThread *thread)
412 if (!thread->synch_cs)
413 ensure_synch_cs_set (thread);
415 g_assert (thread->synch_cs);
417 mono_coop_mutex_lock (thread->synch_cs);
421 unlock_thread (MonoInternalThread *thread)
423 mono_coop_mutex_unlock (thread->synch_cs);
426 static inline gboolean
427 is_appdomainunloaded_exception (MonoClass *klass)
429 return klass == mono_class_get_appdomain_unloaded_exception_class ();
432 static inline gboolean
433 is_threadabort_exception (MonoClass *klass)
435 return klass == mono_defaults.threadabortexception_class;
439 * A special static data offset (guint32) consists of 3 parts:
441 * [0] 6-bit index into the array of chunks.
442 * [6] 25-bit offset into the array.
443 * [31] Bit indicating thread or context static.
448 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
459 } SpecialStaticOffset;
461 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
462 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
464 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
465 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
466 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
467 (((SpecialStaticOffset *) &(x))->fields.f)
470 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
472 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
474 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
475 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
477 return ((char *) thread->static_data [idx]) + off;
481 get_context_static_data (MonoAppContext *ctx, guint32 offset)
483 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
485 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
486 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
488 return ((char *) ctx->static_data [idx]) + off;
492 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
494 static MonoClassField *current_thread_field = NULL;
498 if (!current_thread_field) {
499 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
500 g_assert (current_thread_field);
503 mono_class_vtable (domain, mono_defaults.thread_class);
504 mono_domain_lock (domain);
505 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
506 mono_domain_unlock (domain);
509 return (MonoThread **)get_thread_static_data (thread, offset);
513 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
515 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
517 g_assert (current->obj.vtable->domain == domain);
519 g_assert (!*current_thread_ptr);
520 *current_thread_ptr = current;
524 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
530 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
533 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
534 /* only possible failure mode is OOM, from which we don't expect to recover. */
535 mono_error_assert_ok (&error);
537 MONO_OBJECT_SETREF (thread, internal_thread, internal);
542 static MonoInternalThread*
543 create_internal_thread_object (void)
546 MonoInternalThread *thread;
549 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
550 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
551 /* only possible failure mode is OOM, from which we don't exect to recover */
552 mono_error_assert_ok (&error);
554 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
555 mono_coop_mutex_init_recursive (thread->synch_cs);
557 thread->apartment_state = ThreadApartmentState_Unknown;
558 thread->managed_id = get_next_managed_thread_id ();
559 if (mono_gc_is_moving ()) {
560 thread->thread_pinning_ref = thread;
561 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
564 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
566 thread->suspended = g_new0 (MonoOSEvent, 1);
567 mono_os_event_init (thread->suspended, TRUE);
573 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
577 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
578 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
579 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
584 g_assert (internal->native_handle);
586 res = SetThreadPriority (internal->native_handle, priority - 2);
588 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
589 #else /* HOST_WIN32 */
592 struct sched_param param;
595 tid = thread_get_tid (internal);
597 res = pthread_getschedparam (tid, &policy, ¶m);
599 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
601 #ifdef _POSIX_PRIORITY_SCHEDULING
604 /* Necessary to get valid priority range */
606 min = sched_get_priority_min (policy);
607 max = sched_get_priority_max (policy);
609 if (max > 0 && min >= 0 && max > min) {
610 double srange, drange, sposition, dposition;
611 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
613 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
614 dposition = (sposition / srange) * drange;
615 param.sched_priority = (int)(dposition + min);
622 param.sched_priority = 50;
628 param.sched_priority = 0;
631 g_warning ("%s: unknown policy %d", __func__, policy);
636 res = pthread_setschedparam (tid, policy, ¶m);
639 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
642 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
644 #endif /* HOST_WIN32 */
648 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
651 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain, gsize *stack_ptr)
653 MonoThreadInfo *info;
654 MonoInternalThread *internal;
655 MonoDomain *domain, *root_domain;
659 info = mono_thread_info_current ();
661 internal = thread->internal_thread;
662 internal->handle = mono_threads_open_thread_handle (info->handle);
664 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
666 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
667 internal->thread_info = info;
668 internal->small_id = info->small_id;
669 internal->stack_ptr = stack_ptr;
671 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
673 SET_CURRENT_OBJECT (internal);
675 domain = mono_object_domain (thread);
677 mono_thread_push_appdomain_ref (domain);
678 if (!mono_domain_set (domain, force_domain)) {
679 mono_thread_pop_appdomain_ref ();
683 mono_threads_lock ();
685 if (threads_starting_up)
686 mono_g_hash_table_remove (threads_starting_up, thread);
688 if (shutting_down && !force_attach) {
689 mono_threads_unlock ();
690 mono_thread_pop_appdomain_ref ();
695 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
698 /* We don't need to duplicate thread->handle, because it is
699 * only closed when the thread object is finalized by the GC. */
700 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
702 /* We have to do this here because mono_thread_start_cb
703 * requires that root_domain_thread is set up. */
704 if (thread_static_info.offset || thread_static_info.idx > 0) {
705 /* get the current allocated size */
706 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
707 mono_alloc_static_data (&internal->static_data, offset, TRUE);
710 mono_threads_unlock ();
712 root_domain = mono_get_root_domain ();
714 g_assert (!internal->root_domain_thread);
715 if (domain != root_domain)
716 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
718 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
720 if (domain != root_domain)
721 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
723 set_current_thread_for_domain (domain, internal, thread);
725 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
733 MonoObject *start_delegate;
734 MonoObject *start_delegate_arg;
735 MonoThreadStart start_func;
736 gpointer start_func_arg;
738 MonoCoopSem registered;
741 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
744 MonoThreadStart start_func;
745 void *start_func_arg;
748 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
752 MonoInternalThread *internal;
753 MonoObject *start_delegate;
754 MonoObject *start_delegate_arg;
757 thread = start_info->thread;
758 internal = thread->internal_thread;
759 domain = mono_object_domain (start_info->thread);
761 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
763 if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
764 start_info->failed = TRUE;
766 mono_coop_sem_post (&start_info->registered);
768 if (InterlockedDecrement (&start_info->ref) == 0) {
769 mono_coop_sem_destroy (&start_info->registered);
776 mono_thread_internal_set_priority (internal, internal->priority);
780 start_delegate = start_info->start_delegate;
781 start_delegate_arg = start_info->start_delegate_arg;
782 start_func = start_info->start_func;
783 start_func_arg = start_info->start_func_arg;
785 /* This MUST be called before any managed code can be
786 * executed, as it calls the callback function that (for the
787 * jit) sets the lmf marker.
790 if (mono_thread_start_cb)
791 mono_thread_start_cb (tid, stack_ptr, start_func);
793 /* On 2.0 profile (and higher), set explicitly since state might have been
795 if (internal->apartment_state == ThreadApartmentState_Unknown)
796 internal->apartment_state = ThreadApartmentState_MTA;
798 mono_thread_init_apartment_state ();
800 /* Let the thread that called Start() know we're ready */
801 mono_coop_sem_post (&start_info->registered);
803 if (InterlockedDecrement (&start_info->ref) == 0) {
804 mono_coop_sem_destroy (&start_info->registered);
808 /* start_info is not valid anymore */
812 * Call this after calling start_notify, since the profiler callback might want
813 * to lock the thread, and the lock is held by thread_start () which waits for
816 mono_profiler_thread_start (tid);
818 /* if the name was set before starting, we didn't invoke the profiler callback */
819 if (internal->name) {
820 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
821 mono_profiler_thread_name (internal->tid, tname);
822 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
826 /* start_func is set only for unmanaged start functions */
828 start_func (start_func_arg);
832 g_assert (start_delegate != NULL);
834 /* we may want to handle the exception here. See comment below on unhandled exceptions */
835 args [0] = (gpointer) start_delegate_arg;
836 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
838 if (!mono_error_ok (&error)) {
839 MonoException *ex = mono_error_convert_to_exception (&error);
841 g_assert (ex != NULL);
842 MonoClass *klass = mono_object_get_class (&ex->object);
843 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
844 !is_threadabort_exception (klass)) {
845 mono_unhandled_exception (&ex->object);
846 mono_invoke_unhandled_exception_hook (&ex->object);
847 g_assert_not_reached ();
850 mono_error_cleanup (&error);
854 /* If the thread calls ExitThread at all, this remaining code
855 * will not be executed, but the main thread will eventually
856 * call mono_thread_detach_internal() on this thread's behalf.
859 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
861 /* Do any cleanup needed for apartment state. This
862 * cannot be done in mono_thread_detach_internal since
863 * mono_thread_detach_internal could be called for a
864 * thread other than the current thread.
865 * mono_thread_cleanup_apartment_state cleans up apartment
866 * for the current thead */
867 mono_thread_cleanup_apartment_state ();
869 mono_thread_detach_internal (internal);
876 static gsize WINAPI start_wrapper(void *data)
878 volatile gsize dummy;
880 return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
886 * Common thread creation code.
887 * LOCKING: Acquires the threads lock.
890 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
891 gboolean threadpool_thread, guint32 stack_size, MonoError *error)
893 StartInfo *start_info = NULL;
894 MonoThreadHandle *thread_handle;
895 MonoNativeThreadId tid;
897 gsize stack_set_size;
900 g_assert (!start_func && !start_func_arg);
902 g_assert (!start_delegate);
905 * Join joinable threads to prevent running out of threads since the finalizer
906 * thread might be blocked/backlogged.
908 mono_threads_join_threads ();
912 mono_threads_lock ();
914 mono_threads_unlock ();
917 if (threads_starting_up == NULL) {
918 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
920 mono_g_hash_table_insert (threads_starting_up, thread, thread);
921 mono_threads_unlock ();
923 internal->threadpool_thread = threadpool_thread;
924 if (threadpool_thread)
925 mono_thread_set_state (internal, ThreadState_Background);
927 start_info = g_new0 (StartInfo, 1);
929 start_info->thread = thread;
930 start_info->start_delegate = start_delegate;
931 start_info->start_delegate_arg = thread->start_obj;
932 start_info->start_func = start_func;
933 start_info->start_func_arg = start_func_arg;
934 start_info->failed = FALSE;
935 mono_coop_sem_init (&start_info->registered, 0);
938 stack_set_size = default_stacksize_for_thread (internal);
942 thread_handle = mono_threads_create_thread (start_wrapper, start_info, &stack_set_size, &tid);
944 if (thread_handle == NULL) {
945 /* The thread couldn't be created, so set an exception */
946 mono_threads_lock ();
947 mono_g_hash_table_remove (threads_starting_up, thread);
948 mono_threads_unlock ();
949 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
950 /* ref is not going to be decremented in start_wrapper_internal */
951 InterlockedDecrement (&start_info->ref);
956 internal->stack_size = (int) stack_set_size;
958 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
961 * Wait for the thread to set up its TLS data etc, so
962 * theres no potential race condition if someone tries
963 * to look up the data believing the thread has
967 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
969 mono_threads_close_thread_handle (thread_handle);
971 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
973 ret = !start_info->failed;
976 if (InterlockedDecrement (&start_info->ref) == 0) {
977 mono_coop_sem_destroy (&start_info->registered);
984 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
986 if (mono_thread_start_cb) {
987 mono_thread_start_cb (tid, stack_start, func);
991 void mono_threads_set_default_stacksize (guint32 stacksize)
993 default_stacksize = stacksize;
996 guint32 mono_threads_get_default_stacksize (void)
998 return default_stacksize;
1002 * mono_thread_create_internal:
1004 * ARG should not be a GC reference.
1007 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
1010 MonoInternalThread *internal;
1015 internal = create_internal_thread_object ();
1017 thread = create_thread_object (domain, internal);
1019 LOCK_THREAD (internal);
1021 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
1022 return_val_if_nok (error, NULL);
1024 UNLOCK_THREAD (internal);
1030 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1033 if (!mono_thread_create_checked (domain, func, arg, &error))
1034 mono_error_cleanup (&error);
1038 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1040 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
1044 mono_thread_attach (MonoDomain *domain)
1046 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1052 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1054 MonoInternalThread *internal;
1056 MonoNativeThreadId tid;
1059 if (mono_thread_internal_current_is_attached ()) {
1060 if (domain != mono_domain_get ())
1061 mono_domain_set (domain, TRUE);
1062 /* Already attached */
1063 return mono_thread_current ();
1066 if (!mono_gc_register_thread (&domain)) {
1067 g_error ("Thread %"G_GSIZE_FORMAT" calling into managed code is not registered with the GC. On UNIX, this can be fixed by #include-ing <gc.h> before <pthread.h> in the file containing the thread creation code.", mono_native_thread_id_get ());
1070 tid=mono_native_thread_id_get ();
1072 internal = create_internal_thread_object ();
1074 thread = create_thread_object (domain, internal);
1076 if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
1077 /* Mono is shutting down, so just wait for the end */
1079 mono_thread_info_sleep (10000, NULL);
1082 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1084 if (mono_thread_attach_cb) {
1088 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1091 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1093 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1096 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1097 if (!mono_thread_info_current ()->tools_thread)
1098 // FIXME: Need a separate callback
1099 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1105 mono_thread_detach_internal (MonoInternalThread *thread)
1109 g_assert (thread != NULL);
1111 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1114 mono_w32mutex_abandon ();
1117 if (thread->abort_state_handle) {
1118 mono_gchandle_free (thread->abort_state_handle);
1119 thread->abort_state_handle = 0;
1122 thread->abort_exc = NULL;
1123 thread->current_appcontext = NULL;
1126 * thread->synch_cs can be NULL if this was called after
1127 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1128 * This can happen only during shutdown.
1129 * The shutting_down flag is not always set, so we can't assert on it.
1131 if (thread->synch_cs)
1132 LOCK_THREAD (thread);
1134 thread->state |= ThreadState_Stopped;
1135 thread->state &= ~ThreadState_Background;
1137 if (thread->synch_cs)
1138 UNLOCK_THREAD (thread);
1141 An interruption request has leaked to cleanup. Adjust the global counter.
1143 This can happen is the abort source thread finds the abortee (this) thread
1144 in unmanaged code. If this thread never trips back to managed code or check
1145 the local flag it will be left set and positively unbalance the global counter.
1147 Leaving the counter unbalanced will cause a performance degradation since all threads
1148 will now keep checking their local flags all the time.
1150 if (mono_thread_clear_interruption_requested (thread))
1151 InterlockedDecrement (&thread_interruption_requested);
1153 mono_threads_lock ();
1157 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1158 /* We have to check whether the thread object for the
1159 * tid is still the same in the table because the
1160 * thread might have been destroyed and the tid reused
1161 * in the meantime, in which case the tid would be in
1162 * the table, but with another thread object.
1166 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1170 mono_threads_unlock ();
1172 /* Don't close the handle here, wait for the object finalizer
1173 * to do it. Otherwise, the following race condition applies:
1175 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1177 * 2) Some other handle is reassigned the same slot
1179 * 3) Another thread tries to join the first thread, and
1180 * blocks waiting for the reassigned handle to be signalled
1181 * (which might never happen). This is possible, because the
1182 * thread calling Join() still has a reference to the first
1186 /* if the thread is not in the hash it has been removed already */
1188 mono_domain_unset ();
1189 mono_memory_barrier ();
1191 if (mono_thread_cleanup_fn)
1192 mono_thread_cleanup_fn (thread_get_tid (thread));
1197 mono_release_type_locks (thread);
1199 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1200 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1201 mono_profiler_thread_end (thread->tid);
1203 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1206 * This will signal async signal handlers that the thread has exited.
1207 * The profiler callback needs this to be set, so it cannot be done earlier.
1209 mono_domain_unset ();
1210 mono_memory_barrier ();
1212 if (thread == mono_thread_internal_current ())
1213 mono_thread_pop_appdomain_ref ();
1215 mono_free_static_data (thread->static_data);
1216 thread->static_data = NULL;
1217 ref_stack_destroy (thread->appdomain_refs);
1218 thread->appdomain_refs = NULL;
1220 g_assert (thread->suspended);
1221 mono_os_event_destroy (thread->suspended);
1222 g_free (thread->suspended);
1223 thread->suspended = NULL;
1225 if (mono_thread_cleanup_fn)
1226 mono_thread_cleanup_fn (thread_get_tid (thread));
1228 mono_memory_barrier ();
1230 if (mono_gc_is_moving ()) {
1231 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1232 thread->thread_pinning_ref = NULL;
1236 SET_CURRENT_OBJECT (NULL);
1237 mono_domain_unset ();
1239 /* Don't need to close the handle to this thread, even though we took a
1240 * reference in mono_thread_attach (), because the GC will do it
1241 * when the Thread object is finalised.
1246 mono_thread_detach (MonoThread *thread)
1249 mono_thread_detach_internal (thread->internal_thread);
1253 * mono_thread_detach_if_exiting:
1255 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1256 * This should be used at the end of embedding code which calls into managed code, and which
1257 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1260 mono_thread_detach_if_exiting (void)
1262 if (mono_thread_info_is_exiting ()) {
1263 MonoInternalThread *thread;
1265 thread = mono_thread_internal_current ();
1267 mono_thread_detach_internal (thread);
1268 mono_thread_info_detach ();
1276 mono_thread_internal_current_is_attached (void)
1278 MonoInternalThread *internal;
1280 internal = GET_CURRENT_OBJECT ();
1288 mono_thread_exit (void)
1290 MonoInternalThread *thread = mono_thread_internal_current ();
1292 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1294 mono_thread_detach_internal (thread);
1296 /* we could add a callback here for embedders to use. */
1297 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1298 exit (mono_environment_exitcode_get ());
1300 mono_thread_info_exit (0);
1304 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1306 MonoInternalThread *internal;
1308 internal = create_internal_thread_object ();
1310 internal->state = ThreadState_Unstarted;
1312 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1316 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1318 return mono_thread_current ();
1322 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1326 MonoInternalThread *internal;
1329 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1331 if (!this_obj->internal_thread)
1332 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1333 internal = this_obj->internal_thread;
1335 LOCK_THREAD (internal);
1337 if ((internal->state & ThreadState_Unstarted) == 0) {
1338 UNLOCK_THREAD (internal);
1339 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1343 if ((internal->state & ThreadState_Aborted) != 0) {
1344 UNLOCK_THREAD (internal);
1348 res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1350 mono_error_cleanup (&error);
1351 UNLOCK_THREAD (internal);
1355 internal->state &= ~ThreadState_Unstarted;
1357 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1359 UNLOCK_THREAD (internal);
1360 return internal->handle;
1364 * This is called from the finalizer of the internal thread object.
1367 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1369 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1372 * Since threads keep a reference to their thread object while running, by
1373 * the time this function is called, the thread has already exited/detached,
1374 * i.e. mono_thread_detach_internal () has ran. The exception is during
1375 * shutdown, when mono_thread_detach_internal () can be called after this.
1377 if (this_obj->handle) {
1378 mono_threads_close_thread_handle (this_obj->handle);
1379 this_obj->handle = NULL;
1383 CloseHandle (this_obj->native_handle);
1386 if (this_obj->synch_cs) {
1387 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1388 this_obj->synch_cs = NULL;
1389 mono_coop_mutex_destroy (synch_cs);
1393 if (this_obj->name) {
1394 void *name = this_obj->name;
1395 this_obj->name = NULL;
1401 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1404 MonoInternalThread *thread = mono_thread_internal_current ();
1406 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1408 if (mono_thread_current_check_pending_interrupt ())
1412 gboolean alerted = FALSE;
1414 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1416 res = mono_thread_info_sleep (ms, &alerted);
1418 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1421 MonoException* exc = mono_thread_execute_interruption ();
1423 mono_raise_exception (exc);
1425 // FIXME: !MONO_INFINITE_WAIT
1426 if (ms != MONO_INFINITE_WAIT)
1435 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1440 ves_icall_System_Threading_Thread_GetDomainID (void)
1442 return mono_domain_get()->domain_id;
1446 ves_icall_System_Threading_Thread_Yield (void)
1448 return mono_thread_info_yield ();
1452 * mono_thread_get_name:
1454 * Return the name of the thread. NAME_LEN is set to the length of the name.
1455 * Return NULL if the thread has no name. The returned memory is owned by the
1459 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1463 LOCK_THREAD (this_obj);
1465 if (!this_obj->name) {
1469 *name_len = this_obj->name_len;
1470 res = g_new (gunichar2, this_obj->name_len);
1471 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1474 UNLOCK_THREAD (this_obj);
1480 * mono_thread_get_name_utf8:
1482 * Return the name of the thread in UTF-8.
1483 * Return NULL if the thread has no name.
1484 * The returned memory is owned by the caller.
1487 mono_thread_get_name_utf8 (MonoThread *thread)
1492 MonoInternalThread *internal = thread->internal_thread;
1493 if (internal == NULL)
1496 LOCK_THREAD (internal);
1498 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1500 UNLOCK_THREAD (internal);
1506 * mono_thread_get_managed_id:
1508 * Return the Thread.ManagedThreadId value of `thread`.
1509 * Returns -1 if `thread` is NULL.
1512 mono_thread_get_managed_id (MonoThread *thread)
1517 MonoInternalThread *internal = thread->internal_thread;
1518 if (internal == NULL)
1521 int32_t id = internal->managed_id;
1527 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1532 error_init (&error);
1534 LOCK_THREAD (this_obj);
1536 if (!this_obj->name)
1539 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1541 UNLOCK_THREAD (this_obj);
1543 if (mono_error_set_pending_exception (&error))
1550 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1552 LOCK_THREAD (this_obj);
1557 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1558 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1559 UNLOCK_THREAD (this_obj);
1561 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1564 if (this_obj->name) {
1565 g_free (this_obj->name);
1566 this_obj->name_len = 0;
1569 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1570 this_obj->name_len = mono_string_length (name);
1573 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1576 this_obj->name = NULL;
1579 UNLOCK_THREAD (this_obj);
1581 if (this_obj->name && this_obj->tid) {
1582 char *tname = mono_string_to_utf8_checked (name, error);
1583 return_if_nok (error);
1584 mono_profiler_thread_name (this_obj->tid, tname);
1585 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1591 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1594 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1595 mono_error_set_pending_exception (&error);
1599 * ves_icall_System_Threading_Thread_GetPriority_internal:
1600 * @param this_obj: The MonoInternalThread on which to operate.
1602 * Gets the priority of the given thread.
1603 * @return: The priority of the given thread.
1606 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1609 MonoInternalThread *internal = this_obj->internal_thread;
1611 LOCK_THREAD (internal);
1612 priority = internal->priority;
1613 UNLOCK_THREAD (internal);
1619 * ves_icall_System_Threading_Thread_SetPriority_internal:
1620 * @param this_obj: The MonoInternalThread on which to operate.
1621 * @param priority: The priority to set.
1623 * Sets the priority of the given thread.
1626 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1628 MonoInternalThread *internal = this_obj->internal_thread;
1630 LOCK_THREAD (internal);
1631 internal->priority = priority;
1632 if (internal->thread_info != NULL)
1633 mono_thread_internal_set_priority (internal, priority);
1634 UNLOCK_THREAD (internal);
1637 /* If the array is already in the requested domain, we just return it,
1638 otherwise we return a copy in that domain. */
1640 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1648 if (mono_object_domain (arr) == domain)
1651 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1652 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1657 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1660 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1661 mono_error_set_pending_exception (&error);
1666 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1669 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1670 mono_error_set_pending_exception (&error);
1675 mono_thread_current (void)
1677 MonoDomain *domain = mono_domain_get ();
1678 MonoInternalThread *internal = mono_thread_internal_current ();
1679 MonoThread **current_thread_ptr;
1681 g_assert (internal);
1682 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1684 if (!*current_thread_ptr) {
1685 g_assert (domain != mono_get_root_domain ());
1686 *current_thread_ptr = create_thread_object (domain, internal);
1688 return *current_thread_ptr;
1691 /* Return the thread object belonging to INTERNAL in the current domain */
1693 mono_thread_current_for_thread (MonoInternalThread *internal)
1695 MonoDomain *domain = mono_domain_get ();
1696 MonoThread **current_thread_ptr;
1698 g_assert (internal);
1699 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1701 if (!*current_thread_ptr) {
1702 g_assert (domain != mono_get_root_domain ());
1703 *current_thread_ptr = create_thread_object (domain, internal);
1705 return *current_thread_ptr;
1709 mono_thread_internal_current (void)
1711 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1712 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1716 static MonoThreadInfoWaitRet
1717 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1720 MonoThreadInfoWaitRet ret;
1727 start = (ms == -1) ? 0 : mono_msec_ticks ();
1730 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1733 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1736 exc = mono_thread_execute_interruption ();
1738 mono_error_set_exception_instance (error, exc);
1745 /* Re-calculate ms according to the time passed */
1746 diff_ms = (gint32)(mono_msec_ticks () - start);
1747 if (diff_ms >= ms) {
1748 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1751 wait = ms - diff_ms;
1758 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1760 MonoInternalThread *thread = this_obj->internal_thread;
1761 MonoThreadHandle *handle = thread->handle;
1762 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1766 if (mono_thread_current_check_pending_interrupt ())
1769 LOCK_THREAD (thread);
1771 if ((thread->state & ThreadState_Unstarted) != 0) {
1772 UNLOCK_THREAD (thread);
1774 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1778 UNLOCK_THREAD (thread);
1781 ms=MONO_INFINITE_WAIT;
1783 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1785 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1787 ret=mono_join_uninterrupted (handle, ms, &error);
1789 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1791 mono_error_set_pending_exception (&error);
1793 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1794 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1799 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1804 #define MANAGED_WAIT_FAILED 0x7fffffff
1807 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1809 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1810 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1811 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1812 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1813 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1814 return WAIT_IO_COMPLETION;
1815 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1816 return WAIT_TIMEOUT;
1817 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1818 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1819 return MANAGED_WAIT_FAILED;
1821 g_error ("%s: unknown val value %d", __func__, val);
1825 static MonoW32HandleWaitRet
1826 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1829 MonoW32HandleWaitRet ret;
1836 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1840 if (numhandles != 1)
1841 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1843 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1845 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1846 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1847 #endif /* HOST_WIN32 */
1850 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1853 exc = mono_thread_execute_interruption ();
1855 mono_error_set_exception_instance (error, exc);
1862 /* Re-calculate ms according to the time passed */
1863 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1864 if (diff_ms >= ms) {
1865 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1868 wait = ms - diff_ms;
1874 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1879 MonoW32HandleWaitRet ret;
1881 MonoObject *waitHandle;
1882 MonoInternalThread *thread = mono_thread_internal_current ();
1884 /* Do this WaitSleepJoin check before creating objects */
1885 if (mono_thread_current_check_pending_interrupt ())
1886 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1888 /* We fail in managed if the array has more than 64 elements */
1889 numhandles = (guint32)mono_array_length(mono_handles);
1890 handles = g_new0(HANDLE, numhandles);
1892 for(i = 0; i < numhandles; i++) {
1893 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1894 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1898 ms=MONO_INFINITE_WAIT;
1901 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1903 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1905 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1909 mono_error_set_pending_exception (&error);
1911 return map_native_wait_result_to_managed (ret, numhandles);
1914 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1917 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1918 uintptr_t numhandles;
1919 MonoW32HandleWaitRet ret;
1921 MonoObject *waitHandle;
1922 MonoInternalThread *thread = mono_thread_internal_current ();
1924 /* Do this WaitSleepJoin check before creating objects */
1925 if (mono_thread_current_check_pending_interrupt ())
1926 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1928 numhandles = mono_array_length(mono_handles);
1929 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1930 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1932 for(i = 0; i < numhandles; i++) {
1933 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1934 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1938 ms=MONO_INFINITE_WAIT;
1941 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1943 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1945 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1947 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1949 mono_error_set_pending_exception (&error);
1951 return map_native_wait_result_to_managed (ret, numhandles);
1954 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1957 MonoW32HandleWaitRet ret;
1958 MonoInternalThread *thread = mono_thread_internal_current ();
1960 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1963 ms=MONO_INFINITE_WAIT;
1966 if (mono_thread_current_check_pending_interrupt ())
1967 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1969 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1971 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1973 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1975 mono_error_set_pending_exception (&error);
1976 return map_native_wait_result_to_managed (ret, 1);
1980 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1982 MonoW32HandleWaitRet ret;
1983 MonoInternalThread *thread = mono_thread_internal_current ();
1986 ms = MONO_INFINITE_WAIT;
1988 if (mono_thread_current_check_pending_interrupt ())
1989 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1991 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1995 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1997 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2001 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2003 return map_native_wait_result_to_managed (ret, 1);
2006 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2008 return InterlockedIncrement (location);
2011 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2013 #if SIZEOF_VOID_P == 4
2014 if (G_UNLIKELY ((size_t)location & 0x7)) {
2016 mono_interlocked_lock ();
2019 mono_interlocked_unlock ();
2023 return InterlockedIncrement64 (location);
2026 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2028 return InterlockedDecrement(location);
2031 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2033 #if SIZEOF_VOID_P == 4
2034 if (G_UNLIKELY ((size_t)location & 0x7)) {
2036 mono_interlocked_lock ();
2039 mono_interlocked_unlock ();
2043 return InterlockedDecrement64 (location);
2046 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2048 return InterlockedExchange(location, value);
2051 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2054 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2055 mono_gc_wbarrier_generic_nostore (location);
2059 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2061 return InterlockedExchangePointer(location, value);
2064 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2066 IntFloatUnion val, ret;
2069 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2075 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2077 #if SIZEOF_VOID_P == 4
2078 if (G_UNLIKELY ((size_t)location & 0x7)) {
2080 mono_interlocked_lock ();
2083 mono_interlocked_unlock ();
2087 return InterlockedExchange64 (location, value);
2091 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2093 LongDoubleUnion val, ret;
2096 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2101 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2103 return InterlockedCompareExchange(location, value, comparand);
2106 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2108 gint32 r = InterlockedCompareExchange(location, value, comparand);
2109 *success = r == comparand;
2113 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2116 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2117 mono_gc_wbarrier_generic_nostore (location);
2121 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2123 return InterlockedCompareExchangePointer(location, value, comparand);
2126 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2128 IntFloatUnion val, ret, cmp;
2131 cmp.fval = comparand;
2132 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2138 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2140 #if SIZEOF_VOID_P == 8
2141 LongDoubleUnion val, comp, ret;
2144 comp.fval = comparand;
2145 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2151 mono_interlocked_lock ();
2153 if (old == comparand)
2155 mono_interlocked_unlock ();
2162 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2164 #if SIZEOF_VOID_P == 4
2165 if (G_UNLIKELY ((size_t)location & 0x7)) {
2167 mono_interlocked_lock ();
2169 if (old == comparand)
2171 mono_interlocked_unlock ();
2175 return InterlockedCompareExchange64 (location, value, comparand);
2179 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2182 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2183 mono_gc_wbarrier_generic_nostore (location);
2188 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2191 MONO_CHECK_NULL (location, NULL);
2192 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2193 mono_gc_wbarrier_generic_nostore (location);
2198 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2200 return InterlockedAdd (location, value);
2204 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2206 #if SIZEOF_VOID_P == 4
2207 if (G_UNLIKELY ((size_t)location & 0x7)) {
2209 mono_interlocked_lock ();
2212 mono_interlocked_unlock ();
2216 return InterlockedAdd64 (location, value);
2220 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2222 #if SIZEOF_VOID_P == 4
2223 if (G_UNLIKELY ((size_t)location & 0x7)) {
2225 mono_interlocked_lock ();
2227 mono_interlocked_unlock ();
2231 return InterlockedRead64 (location);
2235 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2237 mono_memory_barrier ();
2241 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2243 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2245 if (state & ThreadState_Background) {
2246 /* If the thread changes the background mode, the main thread has to
2247 * be notified, since it has to rebuild the list of threads to
2250 mono_os_event_set (&background_change_event);
2255 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2257 mono_thread_set_state (this_obj, (MonoThreadState)state);
2259 if (state & ThreadState_Background) {
2260 /* If the thread changes the background mode, the main thread has to
2261 * be notified, since it has to rebuild the list of threads to
2264 mono_os_event_set (&background_change_event);
2269 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2273 LOCK_THREAD (this_obj);
2275 state = this_obj->state;
2277 UNLOCK_THREAD (this_obj);
2282 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2284 MonoInternalThread *current;
2286 MonoInternalThread *thread = this_obj->internal_thread;
2288 LOCK_THREAD (thread);
2290 current = mono_thread_internal_current ();
2292 thread->thread_interrupt_requested = TRUE;
2293 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2295 UNLOCK_THREAD (thread);
2298 async_abort_internal (thread, FALSE);
2303 * mono_thread_current_check_pending_interrupt:
2305 * Checks if there's a interruption request and set the pending exception if so.
2307 * @returns true if a pending exception was set
2310 mono_thread_current_check_pending_interrupt (void)
2312 MonoInternalThread *thread = mono_thread_internal_current ();
2313 gboolean throw_ = FALSE;
2315 LOCK_THREAD (thread);
2317 if (thread->thread_interrupt_requested) {
2319 thread->thread_interrupt_requested = FALSE;
2322 UNLOCK_THREAD (thread);
2325 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2330 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2332 LOCK_THREAD (thread);
2334 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2335 (thread->state & ThreadState_StopRequested) != 0 ||
2336 (thread->state & ThreadState_Stopped) != 0)
2338 UNLOCK_THREAD (thread);
2342 if ((thread->state & ThreadState_Unstarted) != 0) {
2343 thread->state |= ThreadState_Aborted;
2344 UNLOCK_THREAD (thread);
2348 thread->state |= ThreadState_AbortRequested;
2349 if (thread->abort_state_handle)
2350 mono_gchandle_free (thread->abort_state_handle);
2352 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2353 g_assert (thread->abort_state_handle);
2355 thread->abort_state_handle = 0;
2357 thread->abort_exc = NULL;
2359 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), thread, (gsize)thread->tid));
2361 /* During shutdown, we can't wait for other threads */
2363 /* Make sure the thread is awake */
2364 mono_thread_resume (thread);
2366 UNLOCK_THREAD (thread);
2371 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2373 if (!request_thread_abort (thread, state))
2376 if (thread == mono_thread_internal_current ()) {
2378 self_abort_internal (&error);
2379 mono_error_set_pending_exception (&error);
2381 async_abort_internal (thread, TRUE);
2386 * mono_thread_internal_abort:
2388 * Request thread @thread to be aborted.
2390 * @thread MUST NOT be the current thread.
2393 mono_thread_internal_abort (MonoInternalThread *thread)
2395 g_assert (thread != mono_thread_internal_current ());
2397 if (!request_thread_abort (thread, NULL))
2399 async_abort_internal (thread, TRUE);
2403 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2405 MonoInternalThread *thread = mono_thread_internal_current ();
2406 gboolean was_aborting;
2408 LOCK_THREAD (thread);
2409 was_aborting = thread->state & ThreadState_AbortRequested;
2410 thread->state &= ~ThreadState_AbortRequested;
2411 UNLOCK_THREAD (thread);
2413 if (!was_aborting) {
2414 const char *msg = "Unable to reset abort because no abort was requested";
2415 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2419 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2420 thread->abort_exc = NULL;
2421 if (thread->abort_state_handle) {
2422 mono_gchandle_free (thread->abort_state_handle);
2423 /* This is actually not necessary - the handle
2424 only counts if the exception is set */
2425 thread->abort_state_handle = 0;
2430 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2432 LOCK_THREAD (thread);
2434 thread->state &= ~ThreadState_AbortRequested;
2436 if (thread->abort_exc) {
2437 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2438 thread->abort_exc = NULL;
2439 if (thread->abort_state_handle) {
2440 mono_gchandle_free (thread->abort_state_handle);
2441 /* This is actually not necessary - the handle
2442 only counts if the exception is set */
2443 thread->abort_state_handle = 0;
2447 UNLOCK_THREAD (thread);
2451 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2454 MonoInternalThread *thread = this_obj->internal_thread;
2455 MonoObject *state, *deserialized = NULL;
2458 if (!thread->abort_state_handle)
2461 state = mono_gchandle_get_target (thread->abort_state_handle);
2464 domain = mono_domain_get ();
2465 if (mono_object_domain (state) == domain)
2468 deserialized = mono_object_xdomain_representation (state, domain, &error);
2470 if (!deserialized) {
2471 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2472 if (!is_ok (&error)) {
2473 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2474 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2476 mono_set_pending_exception (invalid_op_exc);
2480 return deserialized;
2484 mono_thread_suspend (MonoInternalThread *thread)
2486 LOCK_THREAD (thread);
2488 if ((thread->state & ThreadState_Unstarted) != 0 ||
2489 (thread->state & ThreadState_Aborted) != 0 ||
2490 (thread->state & ThreadState_Stopped) != 0)
2492 UNLOCK_THREAD (thread);
2496 if ((thread->state & ThreadState_Suspended) != 0 ||
2497 (thread->state & ThreadState_SuspendRequested) != 0 ||
2498 (thread->state & ThreadState_StopRequested) != 0)
2500 UNLOCK_THREAD (thread);
2504 thread->state |= ThreadState_SuspendRequested;
2505 mono_os_event_reset (thread->suspended);
2507 if (thread == mono_thread_internal_current ()) {
2508 /* calls UNLOCK_THREAD (thread) */
2509 self_suspend_internal ();
2511 /* calls UNLOCK_THREAD (thread) */
2512 async_suspend_internal (thread, FALSE);
2519 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2521 if (!mono_thread_suspend (this_obj->internal_thread)) {
2522 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2527 /* LOCKING: LOCK_THREAD(thread) must be held */
2529 mono_thread_resume (MonoInternalThread *thread)
2531 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2532 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2533 thread->state &= ~ThreadState_SuspendRequested;
2534 mono_os_event_set (thread->suspended);
2538 if ((thread->state & ThreadState_Suspended) == 0 ||
2539 (thread->state & ThreadState_Unstarted) != 0 ||
2540 (thread->state & ThreadState_Aborted) != 0 ||
2541 (thread->state & ThreadState_Stopped) != 0)
2543 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2547 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2549 mono_os_event_set (thread->suspended);
2551 if (!thread->self_suspended) {
2552 UNLOCK_THREAD (thread);
2554 /* Awake the thread */
2555 if (!mono_thread_info_resume (thread_get_tid (thread)))
2558 LOCK_THREAD (thread);
2561 thread->state &= ~ThreadState_Suspended;
2567 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2569 if (!thread->internal_thread) {
2570 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2572 LOCK_THREAD (thread->internal_thread);
2573 if (!mono_thread_resume (thread->internal_thread))
2574 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2575 UNLOCK_THREAD (thread->internal_thread);
2580 mono_threads_is_critical_method (MonoMethod *method)
2582 switch (method->wrapper_type) {
2583 case MONO_WRAPPER_RUNTIME_INVOKE:
2584 case MONO_WRAPPER_XDOMAIN_INVOKE:
2585 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2592 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2597 if (mono_threads_is_critical_method (m)) {
2598 *((gboolean*)data) = TRUE;
2605 is_running_protected_wrapper (void)
2607 gboolean found = FALSE;
2608 mono_stack_walk (find_wrapper, &found);
2613 mono_thread_stop (MonoThread *thread)
2615 MonoInternalThread *internal = thread->internal_thread;
2617 LOCK_THREAD (internal);
2619 if (internal->state & (ThreadState_StopRequested | ThreadState_Stopped))
2621 UNLOCK_THREAD (internal);
2625 /* Make sure the internal is awake */
2626 mono_thread_resume (internal);
2628 internal->state |= ThreadState_StopRequested;
2629 internal->state &= ~ThreadState_AbortRequested;
2631 UNLOCK_THREAD (internal);
2633 if (internal == mono_thread_internal_current ()) {
2635 self_abort_internal (&error);
2637 This function is part of the embeding API and has no way to return the exception
2638 to be thrown. So what we do is keep the old behavior and raise the exception.
2640 mono_error_raise_exception (&error); /* OK to throw, see note */
2642 async_abort_internal (internal, TRUE);
2647 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2649 gint8 tmp = *(volatile gint8 *)ptr;
2650 mono_memory_barrier ();
2655 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2657 gint16 tmp = *(volatile gint16 *)ptr;
2658 mono_memory_barrier ();
2663 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2665 gint32 tmp = *(volatile gint32 *)ptr;
2666 mono_memory_barrier ();
2671 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2673 gint64 tmp = *(volatile gint64 *)ptr;
2674 mono_memory_barrier ();
2679 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2681 volatile void *tmp = *(volatile void **)ptr;
2682 mono_memory_barrier ();
2683 return (void *) tmp;
2687 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2689 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2690 mono_memory_barrier ();
2691 return (MonoObject *) tmp;
2695 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2697 double tmp = *(volatile double *)ptr;
2698 mono_memory_barrier ();
2703 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2705 float tmp = *(volatile float *)ptr;
2706 mono_memory_barrier ();
2711 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2713 return InterlockedRead8 ((volatile gint8 *)ptr);
2717 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2719 return InterlockedRead16 ((volatile gint16 *)ptr);
2723 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2725 return InterlockedRead ((volatile gint32 *)ptr);
2729 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2731 #if SIZEOF_VOID_P == 4
2732 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2734 mono_interlocked_lock ();
2735 val = *(gint64*)ptr;
2736 mono_interlocked_unlock ();
2740 return InterlockedRead64 ((volatile gint64 *)ptr);
2744 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2746 return InterlockedReadPointer ((volatile gpointer *)ptr);
2750 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2754 #if SIZEOF_VOID_P == 4
2755 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2757 mono_interlocked_lock ();
2758 val = *(double*)ptr;
2759 mono_interlocked_unlock ();
2764 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2770 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2774 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2780 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2782 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2786 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2788 mono_memory_barrier ();
2789 *(volatile gint8 *)ptr = value;
2793 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2795 mono_memory_barrier ();
2796 *(volatile gint16 *)ptr = value;
2800 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2802 mono_memory_barrier ();
2803 *(volatile gint32 *)ptr = value;
2807 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2809 mono_memory_barrier ();
2810 *(volatile gint64 *)ptr = value;
2814 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2816 mono_memory_barrier ();
2817 *(volatile void **)ptr = value;
2821 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2823 mono_memory_barrier ();
2824 mono_gc_wbarrier_generic_store (ptr, value);
2828 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2830 mono_memory_barrier ();
2831 *(volatile double *)ptr = value;
2835 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2837 mono_memory_barrier ();
2838 *(volatile float *)ptr = value;
2842 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2844 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2848 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2850 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2854 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2856 InterlockedWrite ((volatile gint32 *)ptr, value);
2860 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2862 #if SIZEOF_VOID_P == 4
2863 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2864 mono_interlocked_lock ();
2865 *(gint64*)ptr = value;
2866 mono_interlocked_unlock ();
2871 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2875 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2877 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2881 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2885 #if SIZEOF_VOID_P == 4
2886 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2887 mono_interlocked_lock ();
2888 *(double*)ptr = value;
2889 mono_interlocked_unlock ();
2896 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2900 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2906 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2910 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2912 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2916 free_context (void *user_data)
2918 ContextStaticData *data = user_data;
2920 mono_threads_lock ();
2923 * There is no guarantee that, by the point this reference queue callback
2924 * has been invoked, the GC handle associated with the object will fail to
2925 * resolve as one might expect. So if we don't free and remove the GC
2926 * handle here, free_context_static_data_helper () could end up resolving
2927 * a GC handle to an actually-dead context which would contain a pointer
2928 * to an already-freed static data segment, resulting in a crash when
2931 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2933 mono_threads_unlock ();
2935 mono_gchandle_free (data->gc_handle);
2936 mono_free_static_data (data->static_data);
2941 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2943 mono_threads_lock ();
2945 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2948 contexts = g_hash_table_new (NULL, NULL);
2951 context_queue = mono_gc_reference_queue_new (free_context);
2953 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2954 g_hash_table_insert (contexts, gch, gch);
2957 * We use this intermediate structure to contain a duplicate pointer to
2958 * the static data because we can't rely on being able to resolve the GC
2959 * handle in the reference queue callback.
2961 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2962 data->gc_handle = GPOINTER_TO_UINT (gch);
2965 context_adjust_static_data (ctx);
2966 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2968 mono_threads_unlock ();
2970 mono_profiler_context_loaded (ctx);
2974 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2977 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2978 * cleanup in exceptional circumstances, we don't actually do any
2979 * cleanup work here. We instead do this via a reference queue.
2982 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2984 mono_profiler_context_unloaded (ctx);
2987 void mono_thread_init (MonoThreadStartCB start_cb,
2988 MonoThreadAttachCB attach_cb)
2990 mono_coop_mutex_init_recursive (&threads_mutex);
2992 mono_os_mutex_init_recursive(&interlocked_mutex);
2993 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2995 mono_os_event_init (&background_change_event, FALSE);
2997 mono_init_static_data_info (&thread_static_info);
2998 mono_init_static_data_info (&context_static_info);
3000 mono_thread_start_cb = start_cb;
3001 mono_thread_attach_cb = attach_cb;
3004 void mono_thread_cleanup (void)
3006 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3007 /* The main thread must abandon any held mutexes (particularly
3008 * important for named mutexes as they are shared across
3009 * processes, see bug 74680.) This will happen when the
3010 * thread exits, but if it's not running in a subthread it
3011 * won't exit in time.
3013 mono_w32mutex_abandon ();
3017 /* This stuff needs more testing, it seems one of these
3018 * critical sections can be locked when mono_thread_cleanup is
3021 mono_coop_mutex_destroy (&threads_mutex);
3022 mono_os_mutex_destroy (&interlocked_mutex);
3023 mono_os_mutex_destroy (&delayed_free_table_mutex);
3024 mono_os_mutex_destroy (&small_id_mutex);
3025 mono_os_event_destroy (&background_change_event);
3030 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3032 mono_thread_cleanup_fn = func;
3036 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3038 thread->internal_thread->manage_callback = func;
3042 static void print_tids (gpointer key, gpointer value, gpointer user)
3044 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3045 * sizeof(uint) and a cast to uint would overflow
3047 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3048 * print this as a pointer.
3050 g_message ("Waiting for: %p", key);
3055 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3056 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3061 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3064 MonoThreadInfoWaitRet ret;
3066 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3068 /* Add the thread state change event, so it wakes
3069 * up if a thread changes to background mode. */
3072 if (check_state_change)
3073 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3075 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3078 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3079 /* See the comment in build_wait_tids() */
3080 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3084 for( i = 0; i < wait->num; i++)
3085 mono_threads_close_thread_handle (wait->handles [i]);
3087 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3090 if (ret < wait->num) {
3091 MonoInternalThread *internal;
3093 internal = wait->threads [ret];
3095 mono_threads_lock ();
3096 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3097 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3098 mono_threads_unlock ();
3102 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3104 struct wait_data *wait=(struct wait_data *)user;
3106 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3107 MonoInternalThread *thread=(MonoInternalThread *)value;
3109 /* Ignore background threads, we abort them later */
3110 /* Do not lock here since it is not needed and the caller holds threads_lock */
3111 if (thread->state & ThreadState_Background) {
3112 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3113 return; /* just leave, ignore */
3116 if (mono_gc_is_finalizer_internal_thread (thread)) {
3117 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3121 if (thread == mono_thread_internal_current ()) {
3122 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3126 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3127 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3131 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3132 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3136 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3137 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3138 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3139 wait->threads[wait->num]=thread;
3142 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3144 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3149 /* Just ignore the rest, we can't do anything with
3156 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3158 struct wait_data *wait=(struct wait_data *)user;
3159 MonoNativeThreadId self = mono_native_thread_id_get ();
3160 MonoInternalThread *thread = (MonoInternalThread *)value;
3162 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3165 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3167 if (mono_gc_is_finalizer_internal_thread (thread))
3170 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3171 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3172 wait->threads[wait->num] = thread;
3175 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3176 mono_thread_internal_abort (thread);
3183 * mono_threads_set_shutting_down:
3185 * Is called by a thread that wants to shut down Mono. If the runtime is already
3186 * shutting down, the calling thread is suspended/stopped, and this function never
3190 mono_threads_set_shutting_down (void)
3192 MonoInternalThread *current_thread = mono_thread_internal_current ();
3194 mono_threads_lock ();
3196 if (shutting_down) {
3197 mono_threads_unlock ();
3199 /* Make sure we're properly suspended/stopped */
3201 LOCK_THREAD (current_thread);
3203 if ((current_thread->state & ThreadState_SuspendRequested) ||
3204 (current_thread->state & ThreadState_AbortRequested) ||
3205 (current_thread->state & ThreadState_StopRequested)) {
3206 UNLOCK_THREAD (current_thread);
3207 mono_thread_execute_interruption ();
3209 current_thread->state |= ThreadState_Stopped;
3210 UNLOCK_THREAD (current_thread);
3213 /*since we're killing the thread, detach it.*/
3214 mono_thread_detach_internal (current_thread);
3216 /* Wake up other threads potentially waiting for us */
3217 mono_thread_info_exit (0);
3219 shutting_down = TRUE;
3221 /* Not really a background state change, but this will
3222 * interrupt the main thread if it is waiting for all
3223 * the other threads.
3225 mono_os_event_set (&background_change_event);
3227 mono_threads_unlock ();
3231 void mono_thread_manage (void)
3233 struct wait_data wait_data;
3234 struct wait_data *wait = &wait_data;
3236 memset (wait, 0, sizeof (struct wait_data));
3237 /* join each thread that's still running */
3238 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3240 mono_threads_lock ();
3242 THREAD_DEBUG (g_message("%s: No threads", __func__));
3243 mono_threads_unlock ();
3246 mono_threads_unlock ();
3249 mono_threads_lock ();
3250 if (shutting_down) {
3251 /* somebody else is shutting down */
3252 mono_threads_unlock ();
3255 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3256 mono_g_hash_table_foreach (threads, print_tids, NULL));
3258 mono_os_event_reset (&background_change_event);
3260 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3261 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3262 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3263 mono_threads_unlock ();
3265 /* Something to wait for */
3266 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3267 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3268 } while(wait->num>0);
3270 /* Mono is shutting down, so just wait for the end */
3271 if (!mono_runtime_try_shutdown ()) {
3272 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3273 mono_thread_suspend (mono_thread_internal_current ());
3274 mono_thread_execute_interruption ();
3278 * Remove everything but the finalizer thread and self.
3279 * Also abort all the background threads
3282 mono_threads_lock ();
3285 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3286 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3287 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3289 mono_threads_unlock ();
3291 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3292 if (wait->num > 0) {
3293 /* Something to wait for */
3294 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3296 } while (wait->num > 0);
3299 * give the subthreads a chance to really quit (this is mainly needed
3300 * to get correct user and system times from getrusage/wait/time(1)).
3301 * This could be removed if we avoid pthread_detach() and use pthread_join().
3303 mono_thread_info_yield ();
3307 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3309 MonoInternalThread *thread = (MonoInternalThread*)value;
3310 struct wait_data *wait = (struct wait_data*)user_data;
3313 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3315 * This needs no locking.
3317 if ((thread->state & ThreadState_Suspended) != 0 ||
3318 (thread->state & ThreadState_Stopped) != 0)
3321 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3322 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3323 wait->threads [wait->num] = thread;
3329 * mono_thread_suspend_all_other_threads:
3331 * Suspend all managed threads except the finalizer thread and this thread. It is
3332 * not possible to resume them later.
3334 void mono_thread_suspend_all_other_threads (void)
3336 struct wait_data wait_data;
3337 struct wait_data *wait = &wait_data;
3339 MonoNativeThreadId self = mono_native_thread_id_get ();
3340 guint32 eventidx = 0;
3341 gboolean starting, finished;
3343 memset (wait, 0, sizeof (struct wait_data));
3345 * The other threads could be in an arbitrary state at this point, i.e.
3346 * they could be starting up, shutting down etc. This means that there could be
3347 * threads which are not even in the threads hash table yet.
3351 * First we set a barrier which will be checked by all threads before they
3352 * are added to the threads hash table, and they will exit if the flag is set.
3353 * This ensures that no threads could be added to the hash later.
3354 * We will use shutting_down as the barrier for now.
3356 g_assert (shutting_down);
3359 * We make multiple calls to WaitForMultipleObjects since:
3360 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3361 * - some threads could exit without becoming suspended
3366 * Make a copy of the hashtable since we can't do anything with
3367 * threads while threads_mutex is held.
3370 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3371 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3372 mono_threads_lock ();
3373 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3374 mono_threads_unlock ();
3377 /* Get the suspended events that we'll be waiting for */
3378 for (i = 0; i < wait->num; ++i) {
3379 MonoInternalThread *thread = wait->threads [i];
3381 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3382 || mono_gc_is_finalizer_internal_thread (thread)
3383 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3385 mono_threads_close_thread_handle (wait->handles [i]);
3386 wait->threads [i] = NULL;
3390 LOCK_THREAD (thread);
3392 if ((thread->state & ThreadState_Suspended) != 0 ||
3393 (thread->state & ThreadState_StopRequested) != 0 ||
3394 (thread->state & ThreadState_Stopped) != 0) {
3395 UNLOCK_THREAD (thread);
3396 mono_threads_close_thread_handle (wait->handles [i]);
3397 wait->threads [i] = NULL;
3403 /* Convert abort requests into suspend requests */
3404 if ((thread->state & ThreadState_AbortRequested) != 0)
3405 thread->state &= ~ThreadState_AbortRequested;
3407 thread->state |= ThreadState_SuspendRequested;
3408 mono_os_event_reset (thread->suspended);
3410 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3411 async_suspend_internal (thread, TRUE);
3413 mono_threads_close_thread_handle (wait->handles [i]);
3414 wait->threads [i] = NULL;
3416 if (eventidx <= 0) {
3418 * If there are threads which are starting up, we wait until they
3419 * are suspended when they try to register in the threads hash.
3420 * This is guaranteed to finish, since the threads which can create new
3421 * threads get suspended after a while.
3422 * FIXME: The finalizer thread can still create new threads.
3424 mono_threads_lock ();
3425 if (threads_starting_up)
3426 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3429 mono_threads_unlock ();
3431 mono_thread_info_sleep (100, NULL);
3439 MonoInternalThread *thread;
3440 MonoStackFrameInfo *frames;
3441 int nframes, max_frames;
3442 int nthreads, max_threads;
3443 MonoInternalThread **threads;
3444 } ThreadDumpUserData;
3446 static gboolean thread_dump_requested;
3448 /* This needs to be async safe */
3450 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3452 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3454 if (ud->nframes < ud->max_frames) {
3455 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3462 /* This needs to be async safe */
3463 static SuspendThreadResult
3464 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3466 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3467 MonoInternalThread *thread = user_data->thread;
3470 /* This no longer works with remote unwinding */
3471 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3472 mono_thread_internal_describe (thread, text);
3473 g_string_append (text, "\n");
3476 if (thread == mono_thread_internal_current ())
3477 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3479 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3481 return MonoResumeThread;
3485 int nthreads, max_threads;
3486 MonoInternalThread **threads;
3487 } CollectThreadsUserData;
3490 collect_thread (gpointer key, gpointer value, gpointer user)
3492 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3493 MonoInternalThread *thread = (MonoInternalThread *)value;
3495 if (ud->nthreads < ud->max_threads)
3496 ud->threads [ud->nthreads ++] = thread;
3500 * Collect running threads into the THREADS array.
3501 * THREADS should be an array allocated on the stack.
3504 collect_threads (MonoInternalThread **thread_array, int max_threads)
3506 CollectThreadsUserData ud;
3508 memset (&ud, 0, sizeof (ud));
3509 /* This array contains refs, but its on the stack, so its ok */
3510 ud.threads = thread_array;
3511 ud.max_threads = max_threads;
3513 mono_threads_lock ();
3514 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3515 mono_threads_unlock ();
3521 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3523 GString* text = g_string_new (0);
3525 GError *error = NULL;
3528 ud->thread = thread;
3531 /* Collect frames for the thread */
3532 if (thread == mono_thread_internal_current ()) {
3533 get_thread_dump (mono_thread_info_current (), ud);
3535 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3539 * Do all the non async-safe work outside of get_thread_dump.
3542 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3544 g_string_append_printf (text, "\n\"%s\"", name);
3547 else if (thread->threadpool_thread) {
3548 g_string_append (text, "\n\"<threadpool thread>\"");
3550 g_string_append (text, "\n\"<unnamed thread>\"");
3553 for (i = 0; i < ud->nframes; ++i) {
3554 MonoStackFrameInfo *frame = &ud->frames [i];
3555 MonoMethod *method = NULL;
3557 if (frame->type == FRAME_TYPE_MANAGED)
3558 method = mono_jit_info_get_method (frame->ji);
3561 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3562 g_string_append_printf (text, " %s\n", location);
3565 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3569 fprintf (stdout, "%s", text->str);
3571 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3572 OutputDebugStringA(text->str);
3575 g_string_free (text, TRUE);
3580 mono_threads_perform_thread_dump (void)
3582 ThreadDumpUserData ud;
3583 MonoInternalThread *thread_array [128];
3584 int tindex, nthreads;
3586 if (!thread_dump_requested)
3589 printf ("Full thread dump:\n");
3591 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3592 nthreads = collect_threads (thread_array, 128);
3594 memset (&ud, 0, sizeof (ud));
3595 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3596 ud.max_frames = 256;
3598 for (tindex = 0; tindex < nthreads; ++tindex)
3599 dump_thread (thread_array [tindex], &ud);
3603 thread_dump_requested = FALSE;
3606 /* Obtain the thread dump of all threads */
3608 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3611 ThreadDumpUserData ud;
3612 MonoInternalThread *thread_array [128];
3613 MonoDomain *domain = mono_domain_get ();
3614 MonoDebugSourceLocation *location;
3615 int tindex, nthreads;
3619 *out_threads = NULL;
3620 *out_stack_frames = NULL;
3622 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3623 nthreads = collect_threads (thread_array, 128);
3625 memset (&ud, 0, sizeof (ud));
3626 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3627 ud.max_frames = 256;
3629 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3632 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3636 for (tindex = 0; tindex < nthreads; ++tindex) {
3637 MonoInternalThread *thread = thread_array [tindex];
3638 MonoArray *thread_frames;
3644 /* Collect frames for the thread */
3645 if (thread == mono_thread_internal_current ()) {
3646 get_thread_dump (mono_thread_info_current (), &ud);
3648 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3651 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3653 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3656 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3658 for (i = 0; i < ud.nframes; ++i) {
3659 MonoStackFrameInfo *frame = &ud.frames [i];
3660 MonoMethod *method = NULL;
3661 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3665 sf->native_offset = frame->native_offset;
3667 if (frame->type == FRAME_TYPE_MANAGED)
3668 method = mono_jit_info_get_method (frame->ji);
3671 sf->method_address = (gsize) frame->ji->code_start;
3673 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3676 MONO_OBJECT_SETREF (sf, method, rm);
3678 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3680 sf->il_offset = location->il_offset;
3682 if (location && location->source_file) {
3683 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3684 sf->line = location->row;
3685 sf->column = location->column;
3687 mono_debug_free_source_location (location);
3692 mono_array_setref (thread_frames, i, sf);
3698 return is_ok (error);
3702 * mono_threads_request_thread_dump:
3704 * Ask all threads except the current to print their stacktrace to stdout.
3707 mono_threads_request_thread_dump (void)
3709 /*The new thread dump code runs out of the finalizer thread. */
3710 thread_dump_requested = TRUE;
3711 mono_gc_finalize_notify ();
3716 gint allocated; /* +1 so that refs [allocated] == NULL */
3720 typedef struct ref_stack RefStack;
3723 ref_stack_new (gint initial_size)
3727 initial_size = MAX (initial_size, 16) + 1;
3728 rs = g_new0 (RefStack, 1);
3729 rs->refs = g_new0 (gpointer, initial_size);
3730 rs->allocated = initial_size;
3735 ref_stack_destroy (gpointer ptr)
3737 RefStack *rs = (RefStack *)ptr;
3746 ref_stack_push (RefStack *rs, gpointer ptr)
3748 g_assert (rs != NULL);
3750 if (rs->bottom >= rs->allocated) {
3751 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3752 rs->allocated <<= 1;
3753 rs->refs [rs->allocated] = NULL;
3755 rs->refs [rs->bottom++] = ptr;
3759 ref_stack_pop (RefStack *rs)
3761 if (rs == NULL || rs->bottom == 0)
3765 rs->refs [rs->bottom] = NULL;
3769 ref_stack_find (RefStack *rs, gpointer ptr)
3776 for (refs = rs->refs; refs && *refs; refs++) {
3784 * mono_thread_push_appdomain_ref:
3786 * Register that the current thread may have references to objects in domain
3787 * @domain on its stack. Each call to this function should be paired with a
3788 * call to pop_appdomain_ref.
3791 mono_thread_push_appdomain_ref (MonoDomain *domain)
3793 MonoInternalThread *thread = mono_thread_internal_current ();
3796 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3797 SPIN_LOCK (thread->lock_thread_id);
3798 if (thread->appdomain_refs == NULL)
3799 thread->appdomain_refs = ref_stack_new (16);
3800 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3801 SPIN_UNLOCK (thread->lock_thread_id);
3806 mono_thread_pop_appdomain_ref (void)
3808 MonoInternalThread *thread = mono_thread_internal_current ();
3811 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3812 SPIN_LOCK (thread->lock_thread_id);
3813 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3814 SPIN_UNLOCK (thread->lock_thread_id);
3819 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3822 SPIN_LOCK (thread->lock_thread_id);
3823 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3824 SPIN_UNLOCK (thread->lock_thread_id);
3829 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3831 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3834 typedef struct abort_appdomain_data {
3835 struct wait_data wait;
3837 } abort_appdomain_data;
3840 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3842 MonoInternalThread *thread = (MonoInternalThread*)value;
3843 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3844 MonoDomain *domain = data->domain;
3846 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3847 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3849 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3850 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3851 data->wait.threads [data->wait.num] = thread;
3854 /* Just ignore the rest, we can't do anything with
3862 * mono_threads_abort_appdomain_threads:
3864 * Abort threads which has references to the given appdomain.
3867 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3869 #ifdef __native_client__
3873 abort_appdomain_data user_data;
3875 int orig_timeout = timeout;
3878 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3880 start_time = mono_msec_ticks ();
3882 mono_threads_lock ();
3884 user_data.domain = domain;
3885 user_data.wait.num = 0;
3886 /* This shouldn't take any locks */
3887 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3888 mono_threads_unlock ();
3890 if (user_data.wait.num > 0) {
3891 /* Abort the threads outside the threads lock */
3892 for (i = 0; i < user_data.wait.num; ++i)
3893 mono_thread_internal_abort (user_data.wait.threads [i]);
3896 * We should wait for the threads either to abort, or to leave the
3897 * domain. We can't do the latter, so we wait with a timeout.
3899 wait_for_tids (&user_data.wait, 100, FALSE);
3902 /* Update remaining time */
3903 timeout -= mono_msec_ticks () - start_time;
3904 start_time = mono_msec_ticks ();
3906 if (orig_timeout != -1 && timeout < 0)
3909 while (user_data.wait.num > 0);
3911 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3917 * mono_thread_get_undeniable_exception:
3919 * Return an exception which needs to be raised when leaving a catch clause.
3920 * This is used for undeniable exception propagation.
3923 mono_thread_get_undeniable_exception (void)
3925 MonoInternalThread *thread = mono_thread_internal_current ();
3927 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3930 // We don't want to have our exception effect calls made by
3931 // the catching block
3933 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3937 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3938 * exception if the thread no longer references a dying appdomain.
3940 thread->abort_exc->trace_ips = NULL;
3941 thread->abort_exc->stack_trace = NULL;
3942 return thread->abort_exc;
3945 #if MONO_SMALL_CONFIG
3946 #define NUM_STATIC_DATA_IDX 4
3947 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3951 #define NUM_STATIC_DATA_IDX 8
3952 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3953 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3957 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3958 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3961 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3963 gpointer *static_data = (gpointer *)addr;
3965 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3966 void **ptr = (void **)static_data [i];
3971 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3972 void **p = ptr + idx;
3975 mark_func ((MonoObject**)p, gc_data);
3981 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3983 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3987 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3989 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3993 * mono_alloc_static_data
3995 * Allocate memory blocks for storing threads or context static data
3998 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4000 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4003 gpointer* static_data = *static_data_ptr;
4005 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4006 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4008 if (mono_gc_user_markers_supported ()) {
4009 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4010 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4012 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4013 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4016 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4017 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4018 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4019 *static_data_ptr = static_data;
4020 static_data [0] = static_data;
4023 for (i = 1; i <= idx; ++i) {
4024 if (static_data [i])
4027 if (mono_gc_user_markers_supported ())
4028 static_data [i] = g_malloc0 (static_data_size [i]);
4030 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4031 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4032 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4037 mono_free_static_data (gpointer* static_data)
4040 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4041 gpointer p = static_data [i];
4045 * At this point, the static data pointer array is still registered with the
4046 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4047 * data. Freeing the individual arrays without first nulling their slots
4048 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4049 * such an already freed array. See bug #13813.
4051 static_data [i] = NULL;
4052 mono_memory_write_barrier ();
4053 if (mono_gc_user_markers_supported ())
4056 mono_gc_free_fixed (p);
4058 mono_gc_free_fixed (static_data);
4062 * mono_init_static_data_info
4064 * Initializes static data counters
4066 static void mono_init_static_data_info (StaticDataInfo *static_data)
4068 static_data->idx = 0;
4069 static_data->offset = 0;
4070 static_data->freelist = NULL;
4074 * mono_alloc_static_data_slot
4076 * Generates an offset for static data. static_data contains the counters
4077 * used to generate it.
4080 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4082 if (!static_data->idx && !static_data->offset) {
4084 * we use the first chunk of the first allocation also as
4085 * an array for the rest of the data
4087 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4089 static_data->offset += align - 1;
4090 static_data->offset &= ~(align - 1);
4091 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4092 static_data->idx ++;
4093 g_assert (size <= static_data_size [static_data->idx]);
4094 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4095 static_data->offset = 0;
4097 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4098 static_data->offset += size;
4103 * LOCKING: requires that threads_mutex is held
4106 context_adjust_static_data (MonoAppContext *ctx)
4108 if (context_static_info.offset || context_static_info.idx > 0) {
4109 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4110 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4111 ctx->data->static_data = ctx->static_data;
4116 * LOCKING: requires that threads_mutex is held
4119 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4121 MonoInternalThread *thread = (MonoInternalThread *)value;
4122 guint32 offset = GPOINTER_TO_UINT (user);
4124 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4128 * LOCKING: requires that threads_mutex is held
4131 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4133 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4138 guint32 offset = GPOINTER_TO_UINT (user);
4139 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4140 ctx->data->static_data = ctx->static_data;
4143 static StaticDataFreeList*
4144 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4146 StaticDataFreeList* prev = NULL;
4147 StaticDataFreeList* tmp = static_data->freelist;
4149 if (tmp->size == size) {
4151 prev->next = tmp->next;
4153 static_data->freelist = tmp->next;
4162 #if SIZEOF_VOID_P == 4
4169 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4171 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4173 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4174 MonoBitSet *rb = sets [idx];
4175 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4176 offset /= sizeof (uintptr_t);
4177 /* offset is now the bitmap offset */
4178 for (int i = 0; i < numbits; ++i) {
4179 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4180 mono_bitset_set_fast (rb, offset + i);
4185 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4187 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4188 MonoBitSet *rb = sets [idx];
4189 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4190 offset /= sizeof (uintptr_t);
4191 /* offset is now the bitmap offset */
4192 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4193 mono_bitset_clear_fast (rb, offset + i);
4197 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4199 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4201 StaticDataInfo *info;
4204 if (static_type == SPECIAL_STATIC_THREAD) {
4205 info = &thread_static_info;
4206 sets = thread_reference_bitmaps;
4208 info = &context_static_info;
4209 sets = context_reference_bitmaps;
4212 mono_threads_lock ();
4214 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4218 offset = item->offset;
4221 offset = mono_alloc_static_data_slot (info, size, align);
4224 update_reference_bitmap (sets, offset, bitmap, numbits);
4226 if (static_type == SPECIAL_STATIC_THREAD) {
4227 /* This can be called during startup */
4228 if (threads != NULL)
4229 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4231 if (contexts != NULL)
4232 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4234 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4237 mono_threads_unlock ();
4243 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4245 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4247 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4248 return get_thread_static_data (thread, offset);
4250 return get_context_static_data (thread->current_appcontext, offset);
4255 mono_get_special_static_data (guint32 offset)
4257 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4266 * LOCKING: requires that threads_mutex is held
4269 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4271 MonoInternalThread *thread = (MonoInternalThread *)value;
4272 OffsetSize *data = (OffsetSize *)user;
4273 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4274 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4277 if (!thread->static_data || !thread->static_data [idx])
4279 ptr = ((char*) thread->static_data [idx]) + off;
4280 mono_gc_bzero_atomic (ptr, data->size);
4284 * LOCKING: requires that threads_mutex is held
4287 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4289 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4294 OffsetSize *data = (OffsetSize *)user;
4295 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4296 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4299 if (!ctx->static_data || !ctx->static_data [idx])
4302 ptr = ((char*) ctx->static_data [idx]) + off;
4303 mono_gc_bzero_atomic (ptr, data->size);
4307 do_free_special_slot (guint32 offset, guint32 size)
4309 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4311 StaticDataInfo *info;
4313 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4314 info = &thread_static_info;
4315 sets = thread_reference_bitmaps;
4317 info = &context_static_info;
4318 sets = context_reference_bitmaps;
4321 guint32 data_offset = offset;
4322 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4323 OffsetSize data = { data_offset, size };
4325 clear_reference_bitmap (sets, data.offset, data.size);
4327 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4328 if (threads != NULL)
4329 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4331 if (contexts != NULL)
4332 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4335 if (!mono_runtime_is_shutting_down ()) {
4336 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4338 item->offset = offset;
4341 item->next = info->freelist;
4342 info->freelist = item;
4347 do_free_special (gpointer key, gpointer value, gpointer data)
4349 MonoClassField *field = (MonoClassField *)key;
4350 guint32 offset = GPOINTER_TO_UINT (value);
4353 size = mono_type_size (field->type, &align);
4354 do_free_special_slot (offset, size);
4358 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4360 mono_threads_lock ();
4362 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4364 mono_threads_unlock ();
4368 static void CALLBACK dummy_apc (ULONG_PTR param)
4374 * mono_thread_execute_interruption
4376 * Performs the operation that the requested thread state requires (abort,
4379 static MonoException*
4380 mono_thread_execute_interruption (void)
4382 MonoInternalThread *thread = mono_thread_internal_current ();
4383 MonoThread *sys_thread = mono_thread_current ();
4385 LOCK_THREAD (thread);
4387 /* MonoThread::interruption_requested can only be changed with atomics */
4388 if (mono_thread_clear_interruption_requested (thread)) {
4389 /* this will consume pending APC calls */
4391 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4393 InterlockedDecrement (&thread_interruption_requested);
4395 /* Clear the interrupted flag of the thread so it can wait again */
4396 mono_thread_info_clear_self_interrupt ();
4399 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4400 if (sys_thread->pending_exception) {
4403 exc = sys_thread->pending_exception;
4404 sys_thread->pending_exception = NULL;
4406 UNLOCK_THREAD (thread);
4408 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4409 UNLOCK_THREAD (thread);
4410 g_assert (sys_thread->pending_exception == NULL);
4411 if (thread->abort_exc == NULL) {
4413 * This might be racy, but it has to be called outside the lock
4414 * since it calls managed code.
4416 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4418 return thread->abort_exc;
4420 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4421 /* calls UNLOCK_THREAD (thread) */
4422 self_suspend_internal ();
4425 else if ((thread->state & ThreadState_StopRequested) != 0) {
4426 /* FIXME: do this through the JIT? */
4428 UNLOCK_THREAD (thread);
4430 mono_thread_exit ();
4432 } else if (thread->thread_interrupt_requested) {
4434 thread->thread_interrupt_requested = FALSE;
4435 UNLOCK_THREAD (thread);
4437 return(mono_get_exception_thread_interrupted ());
4440 UNLOCK_THREAD (thread);
4446 * mono_thread_request_interruption
4448 * A signal handler can call this method to request the interruption of a
4449 * thread. The result of the interruption will depend on the current state of
4450 * the thread. If the result is an exception that needs to be throw, it is
4451 * provided as return value.
4454 mono_thread_request_interruption (gboolean running_managed)
4456 MonoInternalThread *thread = mono_thread_internal_current ();
4458 /* The thread may already be stopping */
4463 if (thread->interrupt_on_stop &&
4464 thread->state & ThreadState_StopRequested &&
4465 thread->state & ThreadState_Background)
4468 if (!mono_thread_set_interruption_requested (thread))
4470 InterlockedIncrement (&thread_interruption_requested);
4472 if (!running_managed || is_running_protected_wrapper ()) {
4473 /* Can't stop while in unmanaged code. Increase the global interruption
4474 request count. When exiting the unmanaged method the count will be
4475 checked and the thread will be interrupted. */
4477 /* this will awake the thread if it is in WaitForSingleObject
4479 /* Our implementation of this function ignores the func argument */
4481 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4483 mono_thread_info_self_interrupt ();
4488 return mono_thread_execute_interruption ();
4492 /*This function should be called by a thread after it has exited all of
4493 * its handle blocks at interruption time.*/
4495 mono_thread_resume_interruption (void)
4497 MonoInternalThread *thread = mono_thread_internal_current ();
4498 gboolean still_aborting;
4500 /* The thread may already be stopping */
4504 LOCK_THREAD (thread);
4505 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4506 UNLOCK_THREAD (thread);
4508 /*This can happen if the protected block called Thread::ResetAbort*/
4509 if (!still_aborting)
4512 if (!mono_thread_set_interruption_requested (thread))
4514 InterlockedIncrement (&thread_interruption_requested);
4516 mono_thread_info_self_interrupt ();
4518 return mono_thread_execute_interruption ();
4521 gboolean mono_thread_interruption_requested ()
4523 if (thread_interruption_requested) {
4524 MonoInternalThread *thread = mono_thread_internal_current ();
4525 /* The thread may already be stopping */
4527 return mono_thread_get_interruption_requested (thread);
4532 static MonoException*
4533 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4535 MonoInternalThread *thread = mono_thread_internal_current ();
4537 /* The thread may already be stopping */
4540 if (!mono_thread_get_interruption_requested (thread))
4542 if (!bypass_abort_protection && is_running_protected_wrapper ())
4545 return mono_thread_execute_interruption ();
4549 * Performs the interruption of the current thread, if one has been requested,
4550 * and the thread is not running a protected wrapper.
4551 * Return the exception which needs to be thrown, if any.
4554 mono_thread_interruption_checkpoint (void)
4556 return mono_thread_interruption_checkpoint_request (FALSE);
4560 * Performs the interruption of the current thread, if one has been requested.
4561 * Return the exception which needs to be thrown, if any.
4564 mono_thread_force_interruption_checkpoint_noraise (void)
4566 return mono_thread_interruption_checkpoint_request (TRUE);
4570 * mono_set_pending_exception:
4572 * Set the pending exception of the current thread to EXC.
4573 * The exception will be thrown when execution returns to managed code.
4576 mono_set_pending_exception (MonoException *exc)
4578 MonoThread *thread = mono_thread_current ();
4580 /* The thread may already be stopping */
4584 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4586 mono_thread_request_interruption (FALSE);
4590 * mono_thread_interruption_request_flag:
4592 * Returns the address of a flag that will be non-zero if an interruption has
4593 * been requested for a thread. The thread to interrupt may not be the current
4594 * thread, so an additional call to mono_thread_interruption_requested() or
4595 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4598 gint32* mono_thread_interruption_request_flag ()
4600 return &thread_interruption_requested;
4604 mono_thread_init_apartment_state (void)
4607 MonoInternalThread* thread = mono_thread_internal_current ();
4609 /* Positive return value indicates success, either
4610 * S_OK if this is first CoInitialize call, or
4611 * S_FALSE if CoInitialize already called, but with same
4612 * threading model. A negative value indicates failure,
4613 * probably due to trying to change the threading model.
4615 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4616 ? COINIT_APARTMENTTHREADED
4617 : COINIT_MULTITHREADED) < 0) {
4618 thread->apartment_state = ThreadApartmentState_Unknown;
4624 mono_thread_cleanup_apartment_state (void)
4627 MonoInternalThread* thread = mono_thread_internal_current ();
4629 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4636 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4638 LOCK_THREAD (thread);
4639 thread->state |= state;
4640 UNLOCK_THREAD (thread);
4644 * mono_thread_test_and_set_state:
4646 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4648 * Returns TRUE is @set was OR'd in.
4651 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4653 LOCK_THREAD (thread);
4655 if ((thread->state & test) != 0) {
4656 UNLOCK_THREAD (thread);
4660 thread->state |= set;
4661 UNLOCK_THREAD (thread);
4667 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4669 LOCK_THREAD (thread);
4670 thread->state &= ~state;
4671 UNLOCK_THREAD (thread);
4675 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4677 gboolean ret = FALSE;
4679 LOCK_THREAD (thread);
4681 if ((thread->state & test) != 0) {
4685 UNLOCK_THREAD (thread);
4691 self_interrupt_thread (void *_unused)
4694 MonoThreadInfo *info;
4696 exc = mono_thread_execute_interruption ();
4698 if (mono_threads_is_coop_enabled ()) {
4699 /* We can return from an async call in coop, as
4700 * it's simply called when exiting the safepoint */
4704 g_error ("%s: we can't resume from an async call", __func__);
4707 info = mono_thread_info_current ();
4709 /* We must use _with_context since we didn't trampoline into the runtime */
4710 mono_raise_exception_with_context (exc, &info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX].ctx); /* FIXME using thread_saved_state [ASYNC_SUSPEND_STATE_INDEX] can race with another suspend coming in. */
4714 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4718 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4722 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4724 MonoJitInfo **dest = (MonoJitInfo **)data;
4730 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4732 MonoJitInfo *ji = NULL;
4737 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4738 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4739 * where we hold runtime locks.
4741 if (!mono_threads_is_coop_enabled ())
4742 mono_thread_info_set_is_async_context (TRUE);
4743 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4744 if (!mono_threads_is_coop_enabled ())
4745 mono_thread_info_set_is_async_context (FALSE);
4750 MonoInternalThread *thread;
4751 gboolean install_async_abort;
4752 MonoThreadInfoInterruptToken *interrupt_token;
4755 static SuspendThreadResult
4756 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4758 AbortThreadData *data = (AbortThreadData *)ud;
4759 MonoInternalThread *thread = data->thread;
4760 MonoJitInfo *ji = NULL;
4761 gboolean protected_wrapper;
4762 gboolean running_managed;
4764 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4765 return MonoResumeThread;
4767 /*someone is already interrupting it*/
4768 if (!mono_thread_set_interruption_requested (thread))
4769 return MonoResumeThread;
4771 InterlockedIncrement (&thread_interruption_requested);
4773 ji = mono_thread_info_get_last_managed (info);
4774 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4775 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4777 if (!protected_wrapper && running_managed) {
4778 /*We are in managed code*/
4779 /*Set the thread to call */
4780 if (data->install_async_abort)
4781 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4782 return MonoResumeThread;
4785 * This will cause waits to be broken.
4786 * It will also prevent the thread from entering a wait, so if the thread returns
4787 * from the wait before it receives the abort signal, it will just spin in the wait
4788 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4791 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4793 return MonoResumeThread;
4798 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4800 AbortThreadData data;
4802 g_assert (thread != mono_thread_internal_current ());
4804 data.thread = thread;
4805 data.install_async_abort = install_async_abort;
4806 data.interrupt_token = NULL;
4808 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4809 if (data.interrupt_token)
4810 mono_thread_info_finish_interrupt (data.interrupt_token);
4811 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4815 self_abort_internal (MonoError *error)
4821 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4822 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4825 Self aborts ignore the protected block logic and raise the TAE regardless. This is verified by one of the tests in mono/tests/abort-cctor.cs.
4827 exc = mono_thread_request_interruption (TRUE);
4829 mono_error_set_exception_instance (error, exc);
4831 mono_thread_info_self_interrupt ();
4835 MonoInternalThread *thread;
4837 MonoThreadInfoInterruptToken *interrupt_token;
4838 } SuspendThreadData;
4840 static SuspendThreadResult
4841 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4843 SuspendThreadData *data = (SuspendThreadData *)ud;
4844 MonoInternalThread *thread = data->thread;
4845 MonoJitInfo *ji = NULL;
4846 gboolean protected_wrapper;
4847 gboolean running_managed;
4849 ji = mono_thread_info_get_last_managed (info);
4850 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4851 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4853 if (running_managed && !protected_wrapper) {
4854 if (mono_threads_is_coop_enabled ()) {
4855 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4856 return MonoResumeThread;
4858 thread->state &= ~ThreadState_SuspendRequested;
4859 thread->state |= ThreadState_Suspended;
4860 return KeepSuspended;
4863 if (mono_thread_set_interruption_requested (thread))
4864 InterlockedIncrement (&thread_interruption_requested);
4865 if (data->interrupt)
4866 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4868 return MonoResumeThread;
4872 /* LOCKING: called with @thread synch_cs held, and releases it */
4874 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4876 SuspendThreadData data;
4878 g_assert (thread != mono_thread_internal_current ());
4880 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4882 thread->self_suspended = FALSE;
4884 data.thread = thread;
4885 data.interrupt = interrupt;
4886 data.interrupt_token = NULL;
4888 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4889 if (data.interrupt_token)
4890 mono_thread_info_finish_interrupt (data.interrupt_token);
4892 UNLOCK_THREAD (thread);
4895 /* LOCKING: called with @thread synch_cs held, and releases it */
4897 self_suspend_internal (void)
4899 MonoInternalThread *thread;
4901 MonoOSEventWaitRet res;
4903 thread = mono_thread_internal_current ();
4905 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4907 thread->self_suspended = TRUE;
4909 thread->state &= ~ThreadState_SuspendRequested;
4910 thread->state |= ThreadState_Suspended;
4912 UNLOCK_THREAD (thread);
4914 event = thread->suspended;
4917 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4918 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4923 suspend_for_shutdown_async_call (gpointer unused)
4926 mono_thread_info_yield ();
4929 static SuspendThreadResult
4930 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4932 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4933 return MonoResumeThread;
4937 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4939 g_assert (thread != mono_thread_internal_current ());
4941 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4945 * mono_thread_is_foreign:
4946 * @thread: the thread to query
4948 * This function allows one to determine if a thread was created by the mono runtime and has
4949 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4951 * Returns: TRUE if @thread was not created by the runtime.
4954 mono_thread_is_foreign (MonoThread *thread)
4956 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4957 return info->runtime_thread == FALSE;
4961 * mono_add_joinable_thread:
4963 * Add TID to the list of joinable threads.
4964 * LOCKING: Acquires the threads lock.
4967 mono_threads_add_joinable_thread (gpointer tid)
4971 * We cannot detach from threads because it causes problems like
4972 * 2fd16f60/r114307. So we collect them and join them when
4973 * we have time (in he finalizer thread).
4975 joinable_threads_lock ();
4976 if (!joinable_threads)
4977 joinable_threads = g_hash_table_new (NULL, NULL);
4978 g_hash_table_insert (joinable_threads, tid, tid);
4979 joinable_thread_count ++;
4980 joinable_threads_unlock ();
4982 mono_gc_finalize_notify ();
4987 * mono_threads_join_threads:
4989 * Join all joinable threads. This is called from the finalizer thread.
4990 * LOCKING: Acquires the threads lock.
4993 mono_threads_join_threads (void)
4996 GHashTableIter iter;
5003 if (!joinable_thread_count)
5007 joinable_threads_lock ();
5009 if (g_hash_table_size (joinable_threads)) {
5010 g_hash_table_iter_init (&iter, joinable_threads);
5011 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5012 thread = (pthread_t)tid;
5013 g_hash_table_remove (joinable_threads, key);
5014 joinable_thread_count --;
5017 joinable_threads_unlock ();
5019 if (thread != pthread_self ()) {
5021 /* This shouldn't block */
5022 mono_threads_join_lock ();
5023 mono_native_thread_join (thread);
5024 mono_threads_join_unlock ();
5037 * Wait for thread TID to exit.
5038 * LOCKING: Acquires the threads lock.
5041 mono_thread_join (gpointer tid)
5045 gboolean found = FALSE;
5047 joinable_threads_lock ();
5048 if (!joinable_threads)
5049 joinable_threads = g_hash_table_new (NULL, NULL);
5050 if (g_hash_table_lookup (joinable_threads, tid)) {
5051 g_hash_table_remove (joinable_threads, tid);
5052 joinable_thread_count --;
5055 joinable_threads_unlock ();
5058 thread = (pthread_t)tid;
5060 mono_native_thread_join (thread);
5066 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5068 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5069 mono_thread_interruption_checkpoint ();
5073 mono_thread_internal_unhandled_exception (MonoObject* exc)
5075 MonoClass *klass = exc->vtable->klass;
5076 if (is_threadabort_exception (klass)) {
5077 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5078 } else if (!is_appdomainunloaded_exception (klass)
5079 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5080 mono_unhandled_exception (exc);
5081 if (mono_environment_exitcode_get () == 1) {
5082 mono_environment_exitcode_set (255);
5083 mono_invoke_unhandled_exception_hook (exc);
5084 g_assert_not_reached ();
5090 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5093 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5094 mono_error_set_pending_exception (&error);
5098 * mono_threads_attach_coop: called by native->managed wrappers
5102 * - @return: the original domain which needs to be restored, or NULL.
5105 * - @dummy: contains the original domain
5106 * - @return: a cookie containing current MonoThreadInfo*.
5109 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5112 gboolean fresh_thread = FALSE;
5115 /* Happens when called from AOTed code which is only used in the root domain. */
5116 domain = mono_get_root_domain ();
5121 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5122 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5123 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5124 * we're only responsible for making the cookie. */
5125 if (mono_threads_is_coop_enabled ()) {
5126 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5127 fresh_thread = !info || !mono_thread_info_is_live (info);
5130 if (!mono_thread_internal_current ()) {
5131 mono_thread_attach_full (domain, FALSE);
5134 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5137 orig = mono_domain_get ();
5139 mono_domain_set (domain, TRUE);
5141 if (!mono_threads_is_coop_enabled ())
5142 return orig != domain ? orig : NULL;
5146 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5147 * return the right cookie. */
5148 return mono_threads_enter_gc_unsafe_region_cookie ();
5151 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5152 return mono_threads_enter_gc_unsafe_region (dummy);
5157 * mono_threads_detach_coop: called by native->managed wrappers
5160 * - @cookie: the original domain which needs to be restored, or NULL.
5164 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5165 * - @dummy: contains the original domain
5168 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5170 MonoDomain *domain, *orig;
5172 if (!mono_threads_is_coop_enabled ()) {
5173 orig = (MonoDomain*) cookie;
5175 mono_domain_set (orig, TRUE);
5177 orig = (MonoDomain*) *dummy;
5179 domain = mono_domain_get ();
5182 /* it won't do anything if cookie is NULL
5183 * thread state RUNNING -> (RUNNING|BLOCKING) */
5184 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5186 if (orig != domain) {
5188 mono_domain_unset ();
5190 mono_domain_set (orig, TRUE);
5196 mono_thread_try_resume_interruption (void)
5198 MonoInternalThread *thread;
5200 thread = mono_thread_internal_current ();
5201 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
5203 if (mono_thread_get_abort_prot_block_count (thread) > 0 || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5206 return mono_thread_resume_interruption ();
5210 /* Returns TRUE if the current thread is ready to be interrupted. */
5212 mono_threads_is_ready_to_be_interrupted (void)
5214 MonoInternalThread *thread;
5216 thread = mono_thread_internal_current ();
5217 LOCK_THREAD (thread);
5218 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5219 UNLOCK_THREAD (thread);
5223 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5224 UNLOCK_THREAD (thread);
5228 UNLOCK_THREAD (thread);
5234 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5236 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5238 if (internal->thread_info) {
5239 g_string_append (text, ", state : ");
5240 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5243 if (internal->owned_mutexes) {
5246 g_string_append (text, ", owns : [");
5247 for (i = 0; i < internal->owned_mutexes->len; i++)
5248 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5249 g_string_append (text, "]");
5254 mono_thread_internal_is_current (MonoInternalThread *internal)
5256 g_assert (internal);
5257 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));