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)
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;
670 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
672 SET_CURRENT_OBJECT (internal);
674 domain = mono_object_domain (thread);
676 mono_thread_push_appdomain_ref (domain);
677 if (!mono_domain_set (domain, force_domain)) {
678 mono_thread_pop_appdomain_ref ();
682 mono_threads_lock ();
684 if (threads_starting_up)
685 mono_g_hash_table_remove (threads_starting_up, thread);
687 if (shutting_down && !force_attach) {
688 mono_threads_unlock ();
689 mono_thread_pop_appdomain_ref ();
694 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
697 /* We don't need to duplicate thread->handle, because it is
698 * only closed when the thread object is finalized by the GC. */
699 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
701 /* We have to do this here because mono_thread_start_cb
702 * requires that root_domain_thread is set up. */
703 if (thread_static_info.offset || thread_static_info.idx > 0) {
704 /* get the current allocated size */
705 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
706 mono_alloc_static_data (&internal->static_data, offset, TRUE);
709 mono_threads_unlock ();
711 root_domain = mono_get_root_domain ();
713 g_assert (!internal->root_domain_thread);
714 if (domain != root_domain)
715 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
717 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
719 if (domain != root_domain)
720 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
722 set_current_thread_for_domain (domain, internal, thread);
724 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
732 MonoObject *start_delegate;
733 MonoObject *start_delegate_arg;
734 MonoThreadStart start_func;
735 gpointer start_func_arg;
736 gboolean force_attach;
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, start_info->force_attach, FALSE)) {
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);
877 start_wrapper (gpointer data)
879 StartInfo *start_info;
880 MonoThreadInfo *info;
883 start_info = (StartInfo*) data;
884 g_assert (start_info);
886 info = mono_thread_info_attach (&res);
887 info->runtime_thread = TRUE;
889 /* Run the actual main function of the thread */
890 res = start_wrapper_internal (start_info, &res);
892 mono_thread_info_exit (res);
894 g_assert_not_reached ();
900 * Common thread creation code.
901 * LOCKING: Acquires the threads lock.
904 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
905 MonoThreadCreateFlags flags, MonoError *error)
907 StartInfo *start_info = NULL;
908 MonoNativeThreadId tid;
910 gsize stack_set_size;
913 g_assert (!start_func && !start_func_arg);
915 g_assert (!start_delegate);
917 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
918 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
919 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
921 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
922 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
923 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
927 * Join joinable threads to prevent running out of threads since the finalizer
928 * thread might be blocked/backlogged.
930 mono_threads_join_threads ();
934 mono_threads_lock ();
935 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
936 mono_threads_unlock ();
939 if (threads_starting_up == NULL) {
940 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
942 mono_g_hash_table_insert (threads_starting_up, thread, thread);
943 mono_threads_unlock ();
945 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
946 if (internal->threadpool_thread)
947 mono_thread_set_state (internal, ThreadState_Background);
949 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
951 start_info = g_new0 (StartInfo, 1);
953 start_info->thread = thread;
954 start_info->start_delegate = start_delegate;
955 start_info->start_delegate_arg = thread->start_obj;
956 start_info->start_func = start_func;
957 start_info->start_func_arg = start_func_arg;
958 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
959 start_info->failed = FALSE;
960 mono_coop_sem_init (&start_info->registered, 0);
962 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
963 stack_set_size = default_stacksize_for_thread (internal);
967 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
968 /* The thread couldn't be created, so set an exception */
969 mono_threads_lock ();
970 mono_g_hash_table_remove (threads_starting_up, thread);
971 mono_threads_unlock ();
972 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
973 /* ref is not going to be decremented in start_wrapper_internal */
974 InterlockedDecrement (&start_info->ref);
979 internal->stack_size = (int) stack_set_size;
981 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
984 * Wait for the thread to set up its TLS data etc, so
985 * theres no potential race condition if someone tries
986 * to look up the data believing the thread has
990 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
992 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));
994 ret = !start_info->failed;
997 if (InterlockedDecrement (&start_info->ref) == 0) {
998 mono_coop_sem_destroy (&start_info->registered);
1005 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1007 if (mono_thread_start_cb) {
1008 mono_thread_start_cb (tid, stack_start, func);
1012 void mono_threads_set_default_stacksize (guint32 stacksize)
1014 default_stacksize = stacksize;
1017 guint32 mono_threads_get_default_stacksize (void)
1019 return default_stacksize;
1023 * mono_thread_create_internal:
1025 * ARG should not be a GC reference.
1028 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1031 MonoInternalThread *internal;
1036 internal = create_internal_thread_object ();
1038 thread = create_thread_object (domain, internal);
1040 LOCK_THREAD (internal);
1042 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1044 UNLOCK_THREAD (internal);
1046 return_val_if_nok (error, NULL);
1051 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1054 if (!mono_thread_create_checked (domain, func, arg, &error))
1055 mono_error_cleanup (&error);
1059 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1061 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1065 mono_thread_attach (MonoDomain *domain)
1067 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1073 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1075 MonoInternalThread *internal;
1077 MonoThreadInfo *info;
1078 MonoNativeThreadId tid;
1081 if (mono_thread_internal_current_is_attached ()) {
1082 if (domain != mono_domain_get ())
1083 mono_domain_set (domain, TRUE);
1084 /* Already attached */
1085 return mono_thread_current ();
1088 info = mono_thread_info_attach (&stack_ptr);
1091 tid=mono_native_thread_id_get ();
1093 internal = create_internal_thread_object ();
1095 thread = create_thread_object (domain, internal);
1097 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1098 /* Mono is shutting down, so just wait for the end */
1100 mono_thread_info_sleep (10000, NULL);
1103 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1105 if (mono_thread_attach_cb) {
1109 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1112 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1114 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1117 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1118 if (!mono_thread_info_current ()->tools_thread)
1119 // FIXME: Need a separate callback
1120 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1126 mono_thread_detach_internal (MonoInternalThread *thread)
1130 g_assert (thread != NULL);
1132 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1135 mono_w32mutex_abandon ();
1138 if (thread->abort_state_handle) {
1139 mono_gchandle_free (thread->abort_state_handle);
1140 thread->abort_state_handle = 0;
1143 thread->abort_exc = NULL;
1144 thread->current_appcontext = NULL;
1147 * thread->synch_cs can be NULL if this was called after
1148 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1149 * This can happen only during shutdown.
1150 * The shutting_down flag is not always set, so we can't assert on it.
1152 if (thread->synch_cs)
1153 LOCK_THREAD (thread);
1155 thread->state |= ThreadState_Stopped;
1156 thread->state &= ~ThreadState_Background;
1158 if (thread->synch_cs)
1159 UNLOCK_THREAD (thread);
1162 An interruption request has leaked to cleanup. Adjust the global counter.
1164 This can happen is the abort source thread finds the abortee (this) thread
1165 in unmanaged code. If this thread never trips back to managed code or check
1166 the local flag it will be left set and positively unbalance the global counter.
1168 Leaving the counter unbalanced will cause a performance degradation since all threads
1169 will now keep checking their local flags all the time.
1171 if (mono_thread_clear_interruption_requested (thread))
1172 InterlockedDecrement (&thread_interruption_requested);
1174 mono_threads_lock ();
1178 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1179 /* We have to check whether the thread object for the
1180 * tid is still the same in the table because the
1181 * thread might have been destroyed and the tid reused
1182 * in the meantime, in which case the tid would be in
1183 * the table, but with another thread object.
1187 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1191 mono_threads_unlock ();
1193 /* Don't close the handle here, wait for the object finalizer
1194 * to do it. Otherwise, the following race condition applies:
1196 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1198 * 2) Some other handle is reassigned the same slot
1200 * 3) Another thread tries to join the first thread, and
1201 * blocks waiting for the reassigned handle to be signalled
1202 * (which might never happen). This is possible, because the
1203 * thread calling Join() still has a reference to the first
1207 /* if the thread is not in the hash it has been removed already */
1209 mono_domain_unset ();
1210 mono_memory_barrier ();
1212 if (mono_thread_cleanup_fn)
1213 mono_thread_cleanup_fn (thread_get_tid (thread));
1218 mono_release_type_locks (thread);
1220 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1221 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1222 mono_profiler_thread_end (thread->tid);
1224 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1227 * This will signal async signal handlers that the thread has exited.
1228 * The profiler callback needs this to be set, so it cannot be done earlier.
1230 mono_domain_unset ();
1231 mono_memory_barrier ();
1233 if (thread == mono_thread_internal_current ())
1234 mono_thread_pop_appdomain_ref ();
1236 mono_free_static_data (thread->static_data);
1237 thread->static_data = NULL;
1238 ref_stack_destroy (thread->appdomain_refs);
1239 thread->appdomain_refs = NULL;
1241 g_assert (thread->suspended);
1242 mono_os_event_destroy (thread->suspended);
1243 g_free (thread->suspended);
1244 thread->suspended = NULL;
1246 if (mono_thread_cleanup_fn)
1247 mono_thread_cleanup_fn (thread_get_tid (thread));
1249 mono_memory_barrier ();
1251 if (mono_gc_is_moving ()) {
1252 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1253 thread->thread_pinning_ref = NULL;
1257 SET_CURRENT_OBJECT (NULL);
1258 mono_domain_unset ();
1260 /* Don't need to close the handle to this thread, even though we took a
1261 * reference in mono_thread_attach (), because the GC will do it
1262 * when the Thread object is finalised.
1267 mono_thread_detach (MonoThread *thread)
1270 mono_thread_detach_internal (thread->internal_thread);
1274 * mono_thread_detach_if_exiting:
1276 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1277 * This should be used at the end of embedding code which calls into managed code, and which
1278 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1281 mono_thread_detach_if_exiting (void)
1283 if (mono_thread_info_is_exiting ()) {
1284 MonoInternalThread *thread;
1286 thread = mono_thread_internal_current ();
1288 mono_thread_detach_internal (thread);
1289 mono_thread_info_detach ();
1297 mono_thread_internal_current_is_attached (void)
1299 MonoInternalThread *internal;
1301 internal = GET_CURRENT_OBJECT ();
1309 mono_thread_exit (void)
1311 MonoInternalThread *thread = mono_thread_internal_current ();
1313 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1315 mono_thread_detach_internal (thread);
1317 /* we could add a callback here for embedders to use. */
1318 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1319 exit (mono_environment_exitcode_get ());
1321 mono_thread_info_exit (0);
1325 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1327 MonoInternalThread *internal;
1329 internal = create_internal_thread_object ();
1331 internal->state = ThreadState_Unstarted;
1333 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1337 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1339 return mono_thread_current ();
1343 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1347 MonoInternalThread *internal;
1350 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1352 if (!this_obj->internal_thread)
1353 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1354 internal = this_obj->internal_thread;
1356 LOCK_THREAD (internal);
1358 if ((internal->state & ThreadState_Unstarted) == 0) {
1359 UNLOCK_THREAD (internal);
1360 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1364 if ((internal->state & ThreadState_Aborted) != 0) {
1365 UNLOCK_THREAD (internal);
1369 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1371 mono_error_cleanup (&error);
1372 UNLOCK_THREAD (internal);
1376 internal->state &= ~ThreadState_Unstarted;
1378 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1380 UNLOCK_THREAD (internal);
1381 return internal->handle;
1385 * This is called from the finalizer of the internal thread object.
1388 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1390 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1393 * Since threads keep a reference to their thread object while running, by
1394 * the time this function is called, the thread has already exited/detached,
1395 * i.e. mono_thread_detach_internal () has ran. The exception is during
1396 * shutdown, when mono_thread_detach_internal () can be called after this.
1398 if (this_obj->handle) {
1399 mono_threads_close_thread_handle (this_obj->handle);
1400 this_obj->handle = NULL;
1404 CloseHandle (this_obj->native_handle);
1407 if (this_obj->synch_cs) {
1408 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1409 this_obj->synch_cs = NULL;
1410 mono_coop_mutex_destroy (synch_cs);
1414 if (this_obj->name) {
1415 void *name = this_obj->name;
1416 this_obj->name = NULL;
1422 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1425 MonoInternalThread *thread = mono_thread_internal_current ();
1427 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1429 if (mono_thread_current_check_pending_interrupt ())
1433 gboolean alerted = FALSE;
1435 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1437 res = mono_thread_info_sleep (ms, &alerted);
1439 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1442 MonoException* exc = mono_thread_execute_interruption ();
1444 mono_raise_exception (exc);
1446 // FIXME: !MONO_INFINITE_WAIT
1447 if (ms != MONO_INFINITE_WAIT)
1456 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1461 ves_icall_System_Threading_Thread_GetDomainID (void)
1463 return mono_domain_get()->domain_id;
1467 ves_icall_System_Threading_Thread_Yield (void)
1469 return mono_thread_info_yield ();
1473 * mono_thread_get_name:
1475 * Return the name of the thread. NAME_LEN is set to the length of the name.
1476 * Return NULL if the thread has no name. The returned memory is owned by the
1480 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1484 LOCK_THREAD (this_obj);
1486 if (!this_obj->name) {
1490 *name_len = this_obj->name_len;
1491 res = g_new (gunichar2, this_obj->name_len);
1492 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1495 UNLOCK_THREAD (this_obj);
1501 * mono_thread_get_name_utf8:
1503 * Return the name of the thread in UTF-8.
1504 * Return NULL if the thread has no name.
1505 * The returned memory is owned by the caller.
1508 mono_thread_get_name_utf8 (MonoThread *thread)
1513 MonoInternalThread *internal = thread->internal_thread;
1514 if (internal == NULL)
1517 LOCK_THREAD (internal);
1519 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1521 UNLOCK_THREAD (internal);
1527 * mono_thread_get_managed_id:
1529 * Return the Thread.ManagedThreadId value of `thread`.
1530 * Returns -1 if `thread` is NULL.
1533 mono_thread_get_managed_id (MonoThread *thread)
1538 MonoInternalThread *internal = thread->internal_thread;
1539 if (internal == NULL)
1542 int32_t id = internal->managed_id;
1548 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1553 error_init (&error);
1555 LOCK_THREAD (this_obj);
1557 if (!this_obj->name)
1560 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1562 UNLOCK_THREAD (this_obj);
1564 if (mono_error_set_pending_exception (&error))
1571 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1573 LOCK_THREAD (this_obj);
1578 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1579 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1580 UNLOCK_THREAD (this_obj);
1582 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1585 if (this_obj->name) {
1586 g_free (this_obj->name);
1587 this_obj->name_len = 0;
1590 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1591 this_obj->name_len = mono_string_length (name);
1594 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1597 this_obj->name = NULL;
1600 UNLOCK_THREAD (this_obj);
1602 if (this_obj->name && this_obj->tid) {
1603 char *tname = mono_string_to_utf8_checked (name, error);
1604 return_if_nok (error);
1605 mono_profiler_thread_name (this_obj->tid, tname);
1606 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1612 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1615 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1616 mono_error_set_pending_exception (&error);
1620 * ves_icall_System_Threading_Thread_GetPriority_internal:
1621 * @param this_obj: The MonoInternalThread on which to operate.
1623 * Gets the priority of the given thread.
1624 * @return: The priority of the given thread.
1627 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1630 MonoInternalThread *internal = this_obj->internal_thread;
1632 LOCK_THREAD (internal);
1633 priority = internal->priority;
1634 UNLOCK_THREAD (internal);
1640 * ves_icall_System_Threading_Thread_SetPriority_internal:
1641 * @param this_obj: The MonoInternalThread on which to operate.
1642 * @param priority: The priority to set.
1644 * Sets the priority of the given thread.
1647 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1649 MonoInternalThread *internal = this_obj->internal_thread;
1651 LOCK_THREAD (internal);
1652 internal->priority = priority;
1653 if (internal->thread_info != NULL)
1654 mono_thread_internal_set_priority (internal, priority);
1655 UNLOCK_THREAD (internal);
1658 /* If the array is already in the requested domain, we just return it,
1659 otherwise we return a copy in that domain. */
1661 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1669 if (mono_object_domain (arr) == domain)
1672 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1673 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1678 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1681 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1682 mono_error_set_pending_exception (&error);
1687 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1690 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1691 mono_error_set_pending_exception (&error);
1696 mono_thread_current (void)
1698 MonoDomain *domain = mono_domain_get ();
1699 MonoInternalThread *internal = mono_thread_internal_current ();
1700 MonoThread **current_thread_ptr;
1702 g_assert (internal);
1703 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1705 if (!*current_thread_ptr) {
1706 g_assert (domain != mono_get_root_domain ());
1707 *current_thread_ptr = create_thread_object (domain, internal);
1709 return *current_thread_ptr;
1712 /* Return the thread object belonging to INTERNAL in the current domain */
1714 mono_thread_current_for_thread (MonoInternalThread *internal)
1716 MonoDomain *domain = mono_domain_get ();
1717 MonoThread **current_thread_ptr;
1719 g_assert (internal);
1720 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1722 if (!*current_thread_ptr) {
1723 g_assert (domain != mono_get_root_domain ());
1724 *current_thread_ptr = create_thread_object (domain, internal);
1726 return *current_thread_ptr;
1730 mono_thread_internal_current (void)
1732 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1733 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1737 static MonoThreadInfoWaitRet
1738 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1741 MonoThreadInfoWaitRet ret;
1748 start = (ms == -1) ? 0 : mono_msec_ticks ();
1751 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1754 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1757 exc = mono_thread_execute_interruption ();
1759 mono_error_set_exception_instance (error, exc);
1766 /* Re-calculate ms according to the time passed */
1767 diff_ms = (gint32)(mono_msec_ticks () - start);
1768 if (diff_ms >= ms) {
1769 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1772 wait = ms - diff_ms;
1779 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1781 MonoInternalThread *thread = this_obj->internal_thread;
1782 MonoThreadHandle *handle = thread->handle;
1783 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1787 if (mono_thread_current_check_pending_interrupt ())
1790 LOCK_THREAD (thread);
1792 if ((thread->state & ThreadState_Unstarted) != 0) {
1793 UNLOCK_THREAD (thread);
1795 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1799 UNLOCK_THREAD (thread);
1802 ms=MONO_INFINITE_WAIT;
1804 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1806 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1808 ret=mono_join_uninterrupted (handle, ms, &error);
1810 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1812 mono_error_set_pending_exception (&error);
1814 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1815 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1820 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1825 #define MANAGED_WAIT_FAILED 0x7fffffff
1828 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1830 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1831 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1832 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1833 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1834 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1835 return WAIT_IO_COMPLETION;
1836 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1837 return WAIT_TIMEOUT;
1838 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1839 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1840 return MANAGED_WAIT_FAILED;
1842 g_error ("%s: unknown val value %d", __func__, val);
1846 static MonoW32HandleWaitRet
1847 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1850 MonoW32HandleWaitRet ret;
1857 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1861 if (numhandles != 1)
1862 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1864 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1866 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1867 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1868 #endif /* HOST_WIN32 */
1871 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1874 exc = mono_thread_execute_interruption ();
1876 mono_error_set_exception_instance (error, exc);
1883 /* Re-calculate ms according to the time passed */
1884 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1885 if (diff_ms >= ms) {
1886 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1889 wait = ms - diff_ms;
1895 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1900 MonoW32HandleWaitRet ret;
1902 MonoObject *waitHandle;
1903 MonoInternalThread *thread = mono_thread_internal_current ();
1905 /* Do this WaitSleepJoin check before creating objects */
1906 if (mono_thread_current_check_pending_interrupt ())
1907 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1909 /* We fail in managed if the array has more than 64 elements */
1910 numhandles = (guint32)mono_array_length(mono_handles);
1911 handles = g_new0(HANDLE, numhandles);
1913 for(i = 0; i < numhandles; i++) {
1914 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1915 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1919 ms=MONO_INFINITE_WAIT;
1922 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1924 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1926 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1930 mono_error_set_pending_exception (&error);
1932 return map_native_wait_result_to_managed (ret, numhandles);
1935 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1938 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1939 uintptr_t numhandles;
1940 MonoW32HandleWaitRet ret;
1942 MonoObject *waitHandle;
1943 MonoInternalThread *thread = mono_thread_internal_current ();
1945 /* Do this WaitSleepJoin check before creating objects */
1946 if (mono_thread_current_check_pending_interrupt ())
1947 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1949 numhandles = mono_array_length(mono_handles);
1950 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1951 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1953 for(i = 0; i < numhandles; i++) {
1954 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1955 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1959 ms=MONO_INFINITE_WAIT;
1962 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1964 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1966 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1968 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1970 mono_error_set_pending_exception (&error);
1972 return map_native_wait_result_to_managed (ret, numhandles);
1975 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1978 MonoW32HandleWaitRet ret;
1979 MonoInternalThread *thread = mono_thread_internal_current ();
1981 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1984 ms=MONO_INFINITE_WAIT;
1987 if (mono_thread_current_check_pending_interrupt ())
1988 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1990 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1992 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1994 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1996 mono_error_set_pending_exception (&error);
1997 return map_native_wait_result_to_managed (ret, 1);
2001 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
2003 MonoW32HandleWaitRet ret;
2004 MonoInternalThread *thread = mono_thread_internal_current ();
2007 ms = MONO_INFINITE_WAIT;
2009 if (mono_thread_current_check_pending_interrupt ())
2010 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2012 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2016 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2018 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2022 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2024 return map_native_wait_result_to_managed (ret, 1);
2027 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2029 return InterlockedIncrement (location);
2032 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2034 #if SIZEOF_VOID_P == 4
2035 if (G_UNLIKELY ((size_t)location & 0x7)) {
2037 mono_interlocked_lock ();
2040 mono_interlocked_unlock ();
2044 return InterlockedIncrement64 (location);
2047 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2049 return InterlockedDecrement(location);
2052 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2054 #if SIZEOF_VOID_P == 4
2055 if (G_UNLIKELY ((size_t)location & 0x7)) {
2057 mono_interlocked_lock ();
2060 mono_interlocked_unlock ();
2064 return InterlockedDecrement64 (location);
2067 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2069 return InterlockedExchange(location, value);
2072 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2075 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2076 mono_gc_wbarrier_generic_nostore (location);
2080 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2082 return InterlockedExchangePointer(location, value);
2085 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2087 IntFloatUnion val, ret;
2090 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2096 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2098 #if SIZEOF_VOID_P == 4
2099 if (G_UNLIKELY ((size_t)location & 0x7)) {
2101 mono_interlocked_lock ();
2104 mono_interlocked_unlock ();
2108 return InterlockedExchange64 (location, value);
2112 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2114 LongDoubleUnion val, ret;
2117 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2122 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2124 return InterlockedCompareExchange(location, value, comparand);
2127 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2129 gint32 r = InterlockedCompareExchange(location, value, comparand);
2130 *success = r == comparand;
2134 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2137 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2138 mono_gc_wbarrier_generic_nostore (location);
2142 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2144 return InterlockedCompareExchangePointer(location, value, comparand);
2147 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2149 IntFloatUnion val, ret, cmp;
2152 cmp.fval = comparand;
2153 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2159 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2161 #if SIZEOF_VOID_P == 8
2162 LongDoubleUnion val, comp, ret;
2165 comp.fval = comparand;
2166 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2172 mono_interlocked_lock ();
2174 if (old == comparand)
2176 mono_interlocked_unlock ();
2183 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2185 #if SIZEOF_VOID_P == 4
2186 if (G_UNLIKELY ((size_t)location & 0x7)) {
2188 mono_interlocked_lock ();
2190 if (old == comparand)
2192 mono_interlocked_unlock ();
2196 return InterlockedCompareExchange64 (location, value, comparand);
2200 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2203 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2204 mono_gc_wbarrier_generic_nostore (location);
2209 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2212 MONO_CHECK_NULL (location, NULL);
2213 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2214 mono_gc_wbarrier_generic_nostore (location);
2219 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2221 return InterlockedAdd (location, value);
2225 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2227 #if SIZEOF_VOID_P == 4
2228 if (G_UNLIKELY ((size_t)location & 0x7)) {
2230 mono_interlocked_lock ();
2233 mono_interlocked_unlock ();
2237 return InterlockedAdd64 (location, value);
2241 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2243 #if SIZEOF_VOID_P == 4
2244 if (G_UNLIKELY ((size_t)location & 0x7)) {
2246 mono_interlocked_lock ();
2248 mono_interlocked_unlock ();
2252 return InterlockedRead64 (location);
2256 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2258 mono_memory_barrier ();
2262 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2264 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2266 if (state & ThreadState_Background) {
2267 /* If the thread changes the background mode, the main thread has to
2268 * be notified, since it has to rebuild the list of threads to
2271 mono_os_event_set (&background_change_event);
2276 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2278 mono_thread_set_state (this_obj, (MonoThreadState)state);
2280 if (state & ThreadState_Background) {
2281 /* If the thread changes the background mode, the main thread has to
2282 * be notified, since it has to rebuild the list of threads to
2285 mono_os_event_set (&background_change_event);
2290 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2294 LOCK_THREAD (this_obj);
2296 state = this_obj->state;
2298 UNLOCK_THREAD (this_obj);
2303 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2305 MonoInternalThread *current;
2307 MonoInternalThread *thread = this_obj->internal_thread;
2309 LOCK_THREAD (thread);
2311 current = mono_thread_internal_current ();
2313 thread->thread_interrupt_requested = TRUE;
2314 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2316 UNLOCK_THREAD (thread);
2319 async_abort_internal (thread, FALSE);
2324 * mono_thread_current_check_pending_interrupt:
2326 * Checks if there's a interruption request and set the pending exception if so.
2328 * @returns true if a pending exception was set
2331 mono_thread_current_check_pending_interrupt (void)
2333 MonoInternalThread *thread = mono_thread_internal_current ();
2334 gboolean throw_ = FALSE;
2336 LOCK_THREAD (thread);
2338 if (thread->thread_interrupt_requested) {
2340 thread->thread_interrupt_requested = FALSE;
2343 UNLOCK_THREAD (thread);
2346 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2351 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2353 LOCK_THREAD (thread);
2355 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2356 (thread->state & ThreadState_StopRequested) != 0 ||
2357 (thread->state & ThreadState_Stopped) != 0)
2359 UNLOCK_THREAD (thread);
2363 if ((thread->state & ThreadState_Unstarted) != 0) {
2364 thread->state |= ThreadState_Aborted;
2365 UNLOCK_THREAD (thread);
2369 thread->state |= ThreadState_AbortRequested;
2370 if (thread->abort_state_handle)
2371 mono_gchandle_free (thread->abort_state_handle);
2373 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2374 g_assert (thread->abort_state_handle);
2376 thread->abort_state_handle = 0;
2378 thread->abort_exc = NULL;
2380 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));
2382 /* During shutdown, we can't wait for other threads */
2384 /* Make sure the thread is awake */
2385 mono_thread_resume (thread);
2387 UNLOCK_THREAD (thread);
2392 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2394 if (!request_thread_abort (thread, state))
2397 if (thread == mono_thread_internal_current ()) {
2399 self_abort_internal (&error);
2400 mono_error_set_pending_exception (&error);
2402 async_abort_internal (thread, TRUE);
2407 * mono_thread_internal_abort:
2409 * Request thread @thread to be aborted.
2411 * @thread MUST NOT be the current thread.
2414 mono_thread_internal_abort (MonoInternalThread *thread)
2416 g_assert (thread != mono_thread_internal_current ());
2418 if (!request_thread_abort (thread, NULL))
2420 async_abort_internal (thread, TRUE);
2424 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2426 MonoInternalThread *thread = mono_thread_internal_current ();
2427 gboolean was_aborting;
2429 LOCK_THREAD (thread);
2430 was_aborting = thread->state & ThreadState_AbortRequested;
2431 thread->state &= ~ThreadState_AbortRequested;
2432 UNLOCK_THREAD (thread);
2434 if (!was_aborting) {
2435 const char *msg = "Unable to reset abort because no abort was requested";
2436 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2440 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2441 thread->abort_exc = NULL;
2442 if (thread->abort_state_handle) {
2443 mono_gchandle_free (thread->abort_state_handle);
2444 /* This is actually not necessary - the handle
2445 only counts if the exception is set */
2446 thread->abort_state_handle = 0;
2451 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2453 LOCK_THREAD (thread);
2455 thread->state &= ~ThreadState_AbortRequested;
2457 if (thread->abort_exc) {
2458 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2459 thread->abort_exc = NULL;
2460 if (thread->abort_state_handle) {
2461 mono_gchandle_free (thread->abort_state_handle);
2462 /* This is actually not necessary - the handle
2463 only counts if the exception is set */
2464 thread->abort_state_handle = 0;
2468 UNLOCK_THREAD (thread);
2472 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2475 MonoInternalThread *thread = this_obj->internal_thread;
2476 MonoObject *state, *deserialized = NULL;
2479 if (!thread->abort_state_handle)
2482 state = mono_gchandle_get_target (thread->abort_state_handle);
2485 domain = mono_domain_get ();
2486 if (mono_object_domain (state) == domain)
2489 deserialized = mono_object_xdomain_representation (state, domain, &error);
2491 if (!deserialized) {
2492 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2493 if (!is_ok (&error)) {
2494 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2495 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2497 mono_set_pending_exception (invalid_op_exc);
2501 return deserialized;
2505 mono_thread_suspend (MonoInternalThread *thread)
2507 LOCK_THREAD (thread);
2509 if ((thread->state & ThreadState_Unstarted) != 0 ||
2510 (thread->state & ThreadState_Aborted) != 0 ||
2511 (thread->state & ThreadState_Stopped) != 0)
2513 UNLOCK_THREAD (thread);
2517 if ((thread->state & ThreadState_Suspended) != 0 ||
2518 (thread->state & ThreadState_SuspendRequested) != 0 ||
2519 (thread->state & ThreadState_StopRequested) != 0)
2521 UNLOCK_THREAD (thread);
2525 thread->state |= ThreadState_SuspendRequested;
2526 mono_os_event_reset (thread->suspended);
2528 if (thread == mono_thread_internal_current ()) {
2529 /* calls UNLOCK_THREAD (thread) */
2530 self_suspend_internal ();
2532 /* calls UNLOCK_THREAD (thread) */
2533 async_suspend_internal (thread, FALSE);
2540 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2542 if (!mono_thread_suspend (this_obj->internal_thread)) {
2543 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2548 /* LOCKING: LOCK_THREAD(thread) must be held */
2550 mono_thread_resume (MonoInternalThread *thread)
2552 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2553 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2554 thread->state &= ~ThreadState_SuspendRequested;
2555 mono_os_event_set (thread->suspended);
2559 if ((thread->state & ThreadState_Suspended) == 0 ||
2560 (thread->state & ThreadState_Unstarted) != 0 ||
2561 (thread->state & ThreadState_Aborted) != 0 ||
2562 (thread->state & ThreadState_Stopped) != 0)
2564 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2568 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2570 mono_os_event_set (thread->suspended);
2572 if (!thread->self_suspended) {
2573 UNLOCK_THREAD (thread);
2575 /* Awake the thread */
2576 if (!mono_thread_info_resume (thread_get_tid (thread)))
2579 LOCK_THREAD (thread);
2582 thread->state &= ~ThreadState_Suspended;
2588 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2590 if (!thread->internal_thread) {
2591 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2593 LOCK_THREAD (thread->internal_thread);
2594 if (!mono_thread_resume (thread->internal_thread))
2595 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2596 UNLOCK_THREAD (thread->internal_thread);
2601 mono_threads_is_critical_method (MonoMethod *method)
2603 switch (method->wrapper_type) {
2604 case MONO_WRAPPER_RUNTIME_INVOKE:
2605 case MONO_WRAPPER_XDOMAIN_INVOKE:
2606 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2613 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2618 if (mono_threads_is_critical_method (m)) {
2619 *((gboolean*)data) = TRUE;
2626 is_running_protected_wrapper (void)
2628 gboolean found = FALSE;
2629 mono_stack_walk (find_wrapper, &found);
2634 mono_thread_stop (MonoThread *thread)
2636 MonoInternalThread *internal = thread->internal_thread;
2638 LOCK_THREAD (internal);
2640 if (internal->state & (ThreadState_StopRequested | ThreadState_Stopped))
2642 UNLOCK_THREAD (internal);
2646 /* Make sure the internal is awake */
2647 mono_thread_resume (internal);
2649 internal->state |= ThreadState_StopRequested;
2650 internal->state &= ~ThreadState_AbortRequested;
2652 UNLOCK_THREAD (internal);
2654 if (internal == mono_thread_internal_current ()) {
2656 self_abort_internal (&error);
2658 This function is part of the embeding API and has no way to return the exception
2659 to be thrown. So what we do is keep the old behavior and raise the exception.
2661 mono_error_raise_exception (&error); /* OK to throw, see note */
2663 async_abort_internal (internal, TRUE);
2668 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2670 gint8 tmp = *(volatile gint8 *)ptr;
2671 mono_memory_barrier ();
2676 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2678 gint16 tmp = *(volatile gint16 *)ptr;
2679 mono_memory_barrier ();
2684 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2686 gint32 tmp = *(volatile gint32 *)ptr;
2687 mono_memory_barrier ();
2692 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2694 gint64 tmp = *(volatile gint64 *)ptr;
2695 mono_memory_barrier ();
2700 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2702 volatile void *tmp = *(volatile void **)ptr;
2703 mono_memory_barrier ();
2704 return (void *) tmp;
2708 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2710 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2711 mono_memory_barrier ();
2712 return (MonoObject *) tmp;
2716 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2718 double tmp = *(volatile double *)ptr;
2719 mono_memory_barrier ();
2724 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2726 float tmp = *(volatile float *)ptr;
2727 mono_memory_barrier ();
2732 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2734 return InterlockedRead8 ((volatile gint8 *)ptr);
2738 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2740 return InterlockedRead16 ((volatile gint16 *)ptr);
2744 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2746 return InterlockedRead ((volatile gint32 *)ptr);
2750 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2752 #if SIZEOF_VOID_P == 4
2753 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2755 mono_interlocked_lock ();
2756 val = *(gint64*)ptr;
2757 mono_interlocked_unlock ();
2761 return InterlockedRead64 ((volatile gint64 *)ptr);
2765 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2767 return InterlockedReadPointer ((volatile gpointer *)ptr);
2771 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2775 #if SIZEOF_VOID_P == 4
2776 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2778 mono_interlocked_lock ();
2779 val = *(double*)ptr;
2780 mono_interlocked_unlock ();
2785 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2791 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2795 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2801 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2803 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2807 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2809 mono_memory_barrier ();
2810 *(volatile gint8 *)ptr = value;
2814 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2816 mono_memory_barrier ();
2817 *(volatile gint16 *)ptr = value;
2821 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2823 mono_memory_barrier ();
2824 *(volatile gint32 *)ptr = value;
2828 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2830 mono_memory_barrier ();
2831 *(volatile gint64 *)ptr = value;
2835 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2837 mono_memory_barrier ();
2838 *(volatile void **)ptr = value;
2842 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2844 mono_memory_barrier ();
2845 mono_gc_wbarrier_generic_store (ptr, value);
2849 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2851 mono_memory_barrier ();
2852 *(volatile double *)ptr = value;
2856 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2858 mono_memory_barrier ();
2859 *(volatile float *)ptr = value;
2863 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2865 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2869 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2871 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2875 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2877 InterlockedWrite ((volatile gint32 *)ptr, value);
2881 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2883 #if SIZEOF_VOID_P == 4
2884 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2885 mono_interlocked_lock ();
2886 *(gint64*)ptr = value;
2887 mono_interlocked_unlock ();
2892 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2896 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2898 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2902 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2906 #if SIZEOF_VOID_P == 4
2907 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2908 mono_interlocked_lock ();
2909 *(double*)ptr = value;
2910 mono_interlocked_unlock ();
2917 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2921 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2927 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2931 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2933 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2937 free_context (void *user_data)
2939 ContextStaticData *data = user_data;
2941 mono_threads_lock ();
2944 * There is no guarantee that, by the point this reference queue callback
2945 * has been invoked, the GC handle associated with the object will fail to
2946 * resolve as one might expect. So if we don't free and remove the GC
2947 * handle here, free_context_static_data_helper () could end up resolving
2948 * a GC handle to an actually-dead context which would contain a pointer
2949 * to an already-freed static data segment, resulting in a crash when
2952 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2954 mono_threads_unlock ();
2956 mono_gchandle_free (data->gc_handle);
2957 mono_free_static_data (data->static_data);
2962 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2964 mono_threads_lock ();
2966 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2969 contexts = g_hash_table_new (NULL, NULL);
2972 context_queue = mono_gc_reference_queue_new (free_context);
2974 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2975 g_hash_table_insert (contexts, gch, gch);
2978 * We use this intermediate structure to contain a duplicate pointer to
2979 * the static data because we can't rely on being able to resolve the GC
2980 * handle in the reference queue callback.
2982 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2983 data->gc_handle = GPOINTER_TO_UINT (gch);
2986 context_adjust_static_data (ctx);
2987 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2989 mono_threads_unlock ();
2991 mono_profiler_context_loaded (ctx);
2995 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2998 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2999 * cleanup in exceptional circumstances, we don't actually do any
3000 * cleanup work here. We instead do this via a reference queue.
3003 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
3005 mono_profiler_context_unloaded (ctx);
3008 void mono_thread_init (MonoThreadStartCB start_cb,
3009 MonoThreadAttachCB attach_cb)
3011 mono_coop_mutex_init_recursive (&threads_mutex);
3013 mono_os_mutex_init_recursive(&interlocked_mutex);
3014 mono_os_mutex_init_recursive(&joinable_threads_mutex);
3016 mono_os_event_init (&background_change_event, FALSE);
3018 mono_init_static_data_info (&thread_static_info);
3019 mono_init_static_data_info (&context_static_info);
3021 mono_thread_start_cb = start_cb;
3022 mono_thread_attach_cb = attach_cb;
3025 void mono_thread_cleanup (void)
3027 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3028 /* The main thread must abandon any held mutexes (particularly
3029 * important for named mutexes as they are shared across
3030 * processes, see bug 74680.) This will happen when the
3031 * thread exits, but if it's not running in a subthread it
3032 * won't exit in time.
3034 mono_w32mutex_abandon ();
3038 /* This stuff needs more testing, it seems one of these
3039 * critical sections can be locked when mono_thread_cleanup is
3042 mono_coop_mutex_destroy (&threads_mutex);
3043 mono_os_mutex_destroy (&interlocked_mutex);
3044 mono_os_mutex_destroy (&delayed_free_table_mutex);
3045 mono_os_mutex_destroy (&small_id_mutex);
3046 mono_os_event_destroy (&background_change_event);
3051 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3053 mono_thread_cleanup_fn = func;
3057 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3059 thread->internal_thread->manage_callback = func;
3063 static void print_tids (gpointer key, gpointer value, gpointer user)
3065 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3066 * sizeof(uint) and a cast to uint would overflow
3068 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3069 * print this as a pointer.
3071 g_message ("Waiting for: %p", key);
3076 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3077 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3082 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3085 MonoThreadInfoWaitRet ret;
3087 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3089 /* Add the thread state change event, so it wakes
3090 * up if a thread changes to background mode. */
3093 if (check_state_change)
3094 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3096 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3099 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3100 /* See the comment in build_wait_tids() */
3101 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3105 for( i = 0; i < wait->num; i++)
3106 mono_threads_close_thread_handle (wait->handles [i]);
3108 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3111 if (ret < wait->num) {
3112 MonoInternalThread *internal;
3114 internal = wait->threads [ret];
3116 mono_threads_lock ();
3117 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3118 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3119 mono_threads_unlock ();
3123 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3125 struct wait_data *wait=(struct wait_data *)user;
3127 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3128 MonoInternalThread *thread=(MonoInternalThread *)value;
3130 /* Ignore background threads, we abort them later */
3131 /* Do not lock here since it is not needed and the caller holds threads_lock */
3132 if (thread->state & ThreadState_Background) {
3133 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3134 return; /* just leave, ignore */
3137 if (mono_gc_is_finalizer_internal_thread (thread)) {
3138 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3142 if (thread == mono_thread_internal_current ()) {
3143 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3147 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3148 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3152 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3153 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3157 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3158 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3159 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3160 wait->threads[wait->num]=thread;
3163 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3165 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3170 /* Just ignore the rest, we can't do anything with
3177 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3179 struct wait_data *wait=(struct wait_data *)user;
3180 MonoNativeThreadId self = mono_native_thread_id_get ();
3181 MonoInternalThread *thread = (MonoInternalThread *)value;
3183 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3186 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3188 if (mono_gc_is_finalizer_internal_thread (thread))
3191 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3192 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3193 wait->threads[wait->num] = thread;
3196 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3197 mono_thread_internal_abort (thread);
3204 * mono_threads_set_shutting_down:
3206 * Is called by a thread that wants to shut down Mono. If the runtime is already
3207 * shutting down, the calling thread is suspended/stopped, and this function never
3211 mono_threads_set_shutting_down (void)
3213 MonoInternalThread *current_thread = mono_thread_internal_current ();
3215 mono_threads_lock ();
3217 if (shutting_down) {
3218 mono_threads_unlock ();
3220 /* Make sure we're properly suspended/stopped */
3222 LOCK_THREAD (current_thread);
3224 if ((current_thread->state & ThreadState_SuspendRequested) ||
3225 (current_thread->state & ThreadState_AbortRequested) ||
3226 (current_thread->state & ThreadState_StopRequested)) {
3227 UNLOCK_THREAD (current_thread);
3228 mono_thread_execute_interruption ();
3230 current_thread->state |= ThreadState_Stopped;
3231 UNLOCK_THREAD (current_thread);
3234 /*since we're killing the thread, detach it.*/
3235 mono_thread_detach_internal (current_thread);
3237 /* Wake up other threads potentially waiting for us */
3238 mono_thread_info_exit (0);
3240 shutting_down = TRUE;
3242 /* Not really a background state change, but this will
3243 * interrupt the main thread if it is waiting for all
3244 * the other threads.
3246 mono_os_event_set (&background_change_event);
3248 mono_threads_unlock ();
3252 void mono_thread_manage (void)
3254 struct wait_data wait_data;
3255 struct wait_data *wait = &wait_data;
3257 memset (wait, 0, sizeof (struct wait_data));
3258 /* join each thread that's still running */
3259 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3261 mono_threads_lock ();
3263 THREAD_DEBUG (g_message("%s: No threads", __func__));
3264 mono_threads_unlock ();
3267 mono_threads_unlock ();
3270 mono_threads_lock ();
3271 if (shutting_down) {
3272 /* somebody else is shutting down */
3273 mono_threads_unlock ();
3276 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3277 mono_g_hash_table_foreach (threads, print_tids, NULL));
3279 mono_os_event_reset (&background_change_event);
3281 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3282 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3283 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3284 mono_threads_unlock ();
3286 /* Something to wait for */
3287 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3288 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3289 } while(wait->num>0);
3291 /* Mono is shutting down, so just wait for the end */
3292 if (!mono_runtime_try_shutdown ()) {
3293 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3294 mono_thread_suspend (mono_thread_internal_current ());
3295 mono_thread_execute_interruption ();
3299 * Remove everything but the finalizer thread and self.
3300 * Also abort all the background threads
3303 mono_threads_lock ();
3306 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3307 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3308 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3310 mono_threads_unlock ();
3312 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3313 if (wait->num > 0) {
3314 /* Something to wait for */
3315 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3317 } while (wait->num > 0);
3320 * give the subthreads a chance to really quit (this is mainly needed
3321 * to get correct user and system times from getrusage/wait/time(1)).
3322 * This could be removed if we avoid pthread_detach() and use pthread_join().
3324 mono_thread_info_yield ();
3328 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3330 MonoInternalThread *thread = (MonoInternalThread*)value;
3331 struct wait_data *wait = (struct wait_data*)user_data;
3334 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3336 * This needs no locking.
3338 if ((thread->state & ThreadState_Suspended) != 0 ||
3339 (thread->state & ThreadState_Stopped) != 0)
3342 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3343 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3344 wait->threads [wait->num] = thread;
3350 * mono_thread_suspend_all_other_threads:
3352 * Suspend all managed threads except the finalizer thread and this thread. It is
3353 * not possible to resume them later.
3355 void mono_thread_suspend_all_other_threads (void)
3357 struct wait_data wait_data;
3358 struct wait_data *wait = &wait_data;
3360 MonoNativeThreadId self = mono_native_thread_id_get ();
3361 guint32 eventidx = 0;
3362 gboolean starting, finished;
3364 memset (wait, 0, sizeof (struct wait_data));
3366 * The other threads could be in an arbitrary state at this point, i.e.
3367 * they could be starting up, shutting down etc. This means that there could be
3368 * threads which are not even in the threads hash table yet.
3372 * First we set a barrier which will be checked by all threads before they
3373 * are added to the threads hash table, and they will exit if the flag is set.
3374 * This ensures that no threads could be added to the hash later.
3375 * We will use shutting_down as the barrier for now.
3377 g_assert (shutting_down);
3380 * We make multiple calls to WaitForMultipleObjects since:
3381 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3382 * - some threads could exit without becoming suspended
3387 * Make a copy of the hashtable since we can't do anything with
3388 * threads while threads_mutex is held.
3391 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3392 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3393 mono_threads_lock ();
3394 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3395 mono_threads_unlock ();
3398 /* Get the suspended events that we'll be waiting for */
3399 for (i = 0; i < wait->num; ++i) {
3400 MonoInternalThread *thread = wait->threads [i];
3402 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3403 || mono_gc_is_finalizer_internal_thread (thread)
3404 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3406 mono_threads_close_thread_handle (wait->handles [i]);
3407 wait->threads [i] = NULL;
3411 LOCK_THREAD (thread);
3413 if ((thread->state & ThreadState_Suspended) != 0 ||
3414 (thread->state & ThreadState_StopRequested) != 0 ||
3415 (thread->state & ThreadState_Stopped) != 0) {
3416 UNLOCK_THREAD (thread);
3417 mono_threads_close_thread_handle (wait->handles [i]);
3418 wait->threads [i] = NULL;
3424 /* Convert abort requests into suspend requests */
3425 if ((thread->state & ThreadState_AbortRequested) != 0)
3426 thread->state &= ~ThreadState_AbortRequested;
3428 thread->state |= ThreadState_SuspendRequested;
3429 mono_os_event_reset (thread->suspended);
3431 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3432 async_suspend_internal (thread, TRUE);
3434 mono_threads_close_thread_handle (wait->handles [i]);
3435 wait->threads [i] = NULL;
3437 if (eventidx <= 0) {
3439 * If there are threads which are starting up, we wait until they
3440 * are suspended when they try to register in the threads hash.
3441 * This is guaranteed to finish, since the threads which can create new
3442 * threads get suspended after a while.
3443 * FIXME: The finalizer thread can still create new threads.
3445 mono_threads_lock ();
3446 if (threads_starting_up)
3447 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3450 mono_threads_unlock ();
3452 mono_thread_info_sleep (100, NULL);
3460 MonoInternalThread *thread;
3461 MonoStackFrameInfo *frames;
3462 int nframes, max_frames;
3463 int nthreads, max_threads;
3464 MonoInternalThread **threads;
3465 } ThreadDumpUserData;
3467 static gboolean thread_dump_requested;
3469 /* This needs to be async safe */
3471 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3473 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3475 if (ud->nframes < ud->max_frames) {
3476 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3483 /* This needs to be async safe */
3484 static SuspendThreadResult
3485 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3487 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3488 MonoInternalThread *thread = user_data->thread;
3491 /* This no longer works with remote unwinding */
3492 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3493 mono_thread_internal_describe (thread, text);
3494 g_string_append (text, "\n");
3497 if (thread == mono_thread_internal_current ())
3498 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3500 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3502 return MonoResumeThread;
3506 int nthreads, max_threads;
3507 MonoInternalThread **threads;
3508 } CollectThreadsUserData;
3511 collect_thread (gpointer key, gpointer value, gpointer user)
3513 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3514 MonoInternalThread *thread = (MonoInternalThread *)value;
3516 if (ud->nthreads < ud->max_threads)
3517 ud->threads [ud->nthreads ++] = thread;
3521 * Collect running threads into the THREADS array.
3522 * THREADS should be an array allocated on the stack.
3525 collect_threads (MonoInternalThread **thread_array, int max_threads)
3527 CollectThreadsUserData ud;
3529 memset (&ud, 0, sizeof (ud));
3530 /* This array contains refs, but its on the stack, so its ok */
3531 ud.threads = thread_array;
3532 ud.max_threads = max_threads;
3534 mono_threads_lock ();
3535 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3536 mono_threads_unlock ();
3542 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3544 GString* text = g_string_new (0);
3546 GError *error = NULL;
3549 ud->thread = thread;
3552 /* Collect frames for the thread */
3553 if (thread == mono_thread_internal_current ()) {
3554 get_thread_dump (mono_thread_info_current (), ud);
3556 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3560 * Do all the non async-safe work outside of get_thread_dump.
3563 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3565 g_string_append_printf (text, "\n\"%s\"", name);
3568 else if (thread->threadpool_thread) {
3569 g_string_append (text, "\n\"<threadpool thread>\"");
3571 g_string_append (text, "\n\"<unnamed thread>\"");
3574 for (i = 0; i < ud->nframes; ++i) {
3575 MonoStackFrameInfo *frame = &ud->frames [i];
3576 MonoMethod *method = NULL;
3578 if (frame->type == FRAME_TYPE_MANAGED)
3579 method = mono_jit_info_get_method (frame->ji);
3582 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3583 g_string_append_printf (text, " %s\n", location);
3586 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3590 fprintf (stdout, "%s", text->str);
3592 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3593 OutputDebugStringA(text->str);
3596 g_string_free (text, TRUE);
3601 mono_threads_perform_thread_dump (void)
3603 ThreadDumpUserData ud;
3604 MonoInternalThread *thread_array [128];
3605 int tindex, nthreads;
3607 if (!thread_dump_requested)
3610 printf ("Full thread dump:\n");
3612 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3613 nthreads = collect_threads (thread_array, 128);
3615 memset (&ud, 0, sizeof (ud));
3616 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3617 ud.max_frames = 256;
3619 for (tindex = 0; tindex < nthreads; ++tindex)
3620 dump_thread (thread_array [tindex], &ud);
3624 thread_dump_requested = FALSE;
3627 /* Obtain the thread dump of all threads */
3629 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3632 ThreadDumpUserData ud;
3633 MonoInternalThread *thread_array [128];
3634 MonoDomain *domain = mono_domain_get ();
3635 MonoDebugSourceLocation *location;
3636 int tindex, nthreads;
3640 *out_threads = NULL;
3641 *out_stack_frames = NULL;
3643 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3644 nthreads = collect_threads (thread_array, 128);
3646 memset (&ud, 0, sizeof (ud));
3647 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3648 ud.max_frames = 256;
3650 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3653 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3657 for (tindex = 0; tindex < nthreads; ++tindex) {
3658 MonoInternalThread *thread = thread_array [tindex];
3659 MonoArray *thread_frames;
3665 /* Collect frames for the thread */
3666 if (thread == mono_thread_internal_current ()) {
3667 get_thread_dump (mono_thread_info_current (), &ud);
3669 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3672 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3674 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3677 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3679 for (i = 0; i < ud.nframes; ++i) {
3680 MonoStackFrameInfo *frame = &ud.frames [i];
3681 MonoMethod *method = NULL;
3682 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3686 sf->native_offset = frame->native_offset;
3688 if (frame->type == FRAME_TYPE_MANAGED)
3689 method = mono_jit_info_get_method (frame->ji);
3692 sf->method_address = (gsize) frame->ji->code_start;
3694 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3697 MONO_OBJECT_SETREF (sf, method, rm);
3699 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3701 sf->il_offset = location->il_offset;
3703 if (location && location->source_file) {
3704 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3705 sf->line = location->row;
3706 sf->column = location->column;
3708 mono_debug_free_source_location (location);
3713 mono_array_setref (thread_frames, i, sf);
3719 return is_ok (error);
3723 * mono_threads_request_thread_dump:
3725 * Ask all threads except the current to print their stacktrace to stdout.
3728 mono_threads_request_thread_dump (void)
3730 /*The new thread dump code runs out of the finalizer thread. */
3731 thread_dump_requested = TRUE;
3732 mono_gc_finalize_notify ();
3737 gint allocated; /* +1 so that refs [allocated] == NULL */
3741 typedef struct ref_stack RefStack;
3744 ref_stack_new (gint initial_size)
3748 initial_size = MAX (initial_size, 16) + 1;
3749 rs = g_new0 (RefStack, 1);
3750 rs->refs = g_new0 (gpointer, initial_size);
3751 rs->allocated = initial_size;
3756 ref_stack_destroy (gpointer ptr)
3758 RefStack *rs = (RefStack *)ptr;
3767 ref_stack_push (RefStack *rs, gpointer ptr)
3769 g_assert (rs != NULL);
3771 if (rs->bottom >= rs->allocated) {
3772 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3773 rs->allocated <<= 1;
3774 rs->refs [rs->allocated] = NULL;
3776 rs->refs [rs->bottom++] = ptr;
3780 ref_stack_pop (RefStack *rs)
3782 if (rs == NULL || rs->bottom == 0)
3786 rs->refs [rs->bottom] = NULL;
3790 ref_stack_find (RefStack *rs, gpointer ptr)
3797 for (refs = rs->refs; refs && *refs; refs++) {
3805 * mono_thread_push_appdomain_ref:
3807 * Register that the current thread may have references to objects in domain
3808 * @domain on its stack. Each call to this function should be paired with a
3809 * call to pop_appdomain_ref.
3812 mono_thread_push_appdomain_ref (MonoDomain *domain)
3814 MonoInternalThread *thread = mono_thread_internal_current ();
3817 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3818 SPIN_LOCK (thread->lock_thread_id);
3819 if (thread->appdomain_refs == NULL)
3820 thread->appdomain_refs = ref_stack_new (16);
3821 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3822 SPIN_UNLOCK (thread->lock_thread_id);
3827 mono_thread_pop_appdomain_ref (void)
3829 MonoInternalThread *thread = mono_thread_internal_current ();
3832 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3833 SPIN_LOCK (thread->lock_thread_id);
3834 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3835 SPIN_UNLOCK (thread->lock_thread_id);
3840 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3843 SPIN_LOCK (thread->lock_thread_id);
3844 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3845 SPIN_UNLOCK (thread->lock_thread_id);
3850 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3852 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3855 typedef struct abort_appdomain_data {
3856 struct wait_data wait;
3858 } abort_appdomain_data;
3861 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3863 MonoInternalThread *thread = (MonoInternalThread*)value;
3864 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3865 MonoDomain *domain = data->domain;
3867 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3868 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3870 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3871 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3872 data->wait.threads [data->wait.num] = thread;
3875 /* Just ignore the rest, we can't do anything with
3883 * mono_threads_abort_appdomain_threads:
3885 * Abort threads which has references to the given appdomain.
3888 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3890 #ifdef __native_client__
3894 abort_appdomain_data user_data;
3896 int orig_timeout = timeout;
3899 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3901 start_time = mono_msec_ticks ();
3903 mono_threads_lock ();
3905 user_data.domain = domain;
3906 user_data.wait.num = 0;
3907 /* This shouldn't take any locks */
3908 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3909 mono_threads_unlock ();
3911 if (user_data.wait.num > 0) {
3912 /* Abort the threads outside the threads lock */
3913 for (i = 0; i < user_data.wait.num; ++i)
3914 mono_thread_internal_abort (user_data.wait.threads [i]);
3917 * We should wait for the threads either to abort, or to leave the
3918 * domain. We can't do the latter, so we wait with a timeout.
3920 wait_for_tids (&user_data.wait, 100, FALSE);
3923 /* Update remaining time */
3924 timeout -= mono_msec_ticks () - start_time;
3925 start_time = mono_msec_ticks ();
3927 if (orig_timeout != -1 && timeout < 0)
3930 while (user_data.wait.num > 0);
3932 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3938 * mono_thread_get_undeniable_exception:
3940 * Return an exception which needs to be raised when leaving a catch clause.
3941 * This is used for undeniable exception propagation.
3944 mono_thread_get_undeniable_exception (void)
3946 MonoInternalThread *thread = mono_thread_internal_current ();
3948 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3951 // We don't want to have our exception effect calls made by
3952 // the catching block
3954 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3958 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3959 * exception if the thread no longer references a dying appdomain.
3961 thread->abort_exc->trace_ips = NULL;
3962 thread->abort_exc->stack_trace = NULL;
3963 return thread->abort_exc;
3966 #if MONO_SMALL_CONFIG
3967 #define NUM_STATIC_DATA_IDX 4
3968 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3972 #define NUM_STATIC_DATA_IDX 8
3973 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3974 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3978 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3979 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3982 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3984 gpointer *static_data = (gpointer *)addr;
3986 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3987 void **ptr = (void **)static_data [i];
3992 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3993 void **p = ptr + idx;
3996 mark_func ((MonoObject**)p, gc_data);
4002 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4004 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4008 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4010 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4014 * mono_alloc_static_data
4016 * Allocate memory blocks for storing threads or context static data
4019 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4021 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4024 gpointer* static_data = *static_data_ptr;
4026 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4027 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4029 if (mono_gc_user_markers_supported ()) {
4030 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4031 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4033 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4034 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4037 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4038 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4039 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4040 *static_data_ptr = static_data;
4041 static_data [0] = static_data;
4044 for (i = 1; i <= idx; ++i) {
4045 if (static_data [i])
4048 if (mono_gc_user_markers_supported ())
4049 static_data [i] = g_malloc0 (static_data_size [i]);
4051 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4052 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4053 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4058 mono_free_static_data (gpointer* static_data)
4061 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4062 gpointer p = static_data [i];
4066 * At this point, the static data pointer array is still registered with the
4067 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4068 * data. Freeing the individual arrays without first nulling their slots
4069 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4070 * such an already freed array. See bug #13813.
4072 static_data [i] = NULL;
4073 mono_memory_write_barrier ();
4074 if (mono_gc_user_markers_supported ())
4077 mono_gc_free_fixed (p);
4079 mono_gc_free_fixed (static_data);
4083 * mono_init_static_data_info
4085 * Initializes static data counters
4087 static void mono_init_static_data_info (StaticDataInfo *static_data)
4089 static_data->idx = 0;
4090 static_data->offset = 0;
4091 static_data->freelist = NULL;
4095 * mono_alloc_static_data_slot
4097 * Generates an offset for static data. static_data contains the counters
4098 * used to generate it.
4101 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4103 if (!static_data->idx && !static_data->offset) {
4105 * we use the first chunk of the first allocation also as
4106 * an array for the rest of the data
4108 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4110 static_data->offset += align - 1;
4111 static_data->offset &= ~(align - 1);
4112 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4113 static_data->idx ++;
4114 g_assert (size <= static_data_size [static_data->idx]);
4115 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4116 static_data->offset = 0;
4118 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4119 static_data->offset += size;
4124 * LOCKING: requires that threads_mutex is held
4127 context_adjust_static_data (MonoAppContext *ctx)
4129 if (context_static_info.offset || context_static_info.idx > 0) {
4130 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4131 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4132 ctx->data->static_data = ctx->static_data;
4137 * LOCKING: requires that threads_mutex is held
4140 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4142 MonoInternalThread *thread = (MonoInternalThread *)value;
4143 guint32 offset = GPOINTER_TO_UINT (user);
4145 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4149 * LOCKING: requires that threads_mutex is held
4152 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4154 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4159 guint32 offset = GPOINTER_TO_UINT (user);
4160 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4161 ctx->data->static_data = ctx->static_data;
4164 static StaticDataFreeList*
4165 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4167 StaticDataFreeList* prev = NULL;
4168 StaticDataFreeList* tmp = static_data->freelist;
4170 if (tmp->size == size) {
4172 prev->next = tmp->next;
4174 static_data->freelist = tmp->next;
4183 #if SIZEOF_VOID_P == 4
4190 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4192 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4194 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4195 MonoBitSet *rb = sets [idx];
4196 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4197 offset /= sizeof (uintptr_t);
4198 /* offset is now the bitmap offset */
4199 for (int i = 0; i < numbits; ++i) {
4200 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4201 mono_bitset_set_fast (rb, offset + i);
4206 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4208 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4209 MonoBitSet *rb = sets [idx];
4210 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4211 offset /= sizeof (uintptr_t);
4212 /* offset is now the bitmap offset */
4213 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4214 mono_bitset_clear_fast (rb, offset + i);
4218 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4220 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4222 StaticDataInfo *info;
4225 if (static_type == SPECIAL_STATIC_THREAD) {
4226 info = &thread_static_info;
4227 sets = thread_reference_bitmaps;
4229 info = &context_static_info;
4230 sets = context_reference_bitmaps;
4233 mono_threads_lock ();
4235 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4239 offset = item->offset;
4242 offset = mono_alloc_static_data_slot (info, size, align);
4245 update_reference_bitmap (sets, offset, bitmap, numbits);
4247 if (static_type == SPECIAL_STATIC_THREAD) {
4248 /* This can be called during startup */
4249 if (threads != NULL)
4250 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4252 if (contexts != NULL)
4253 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4255 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4258 mono_threads_unlock ();
4264 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4266 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4268 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4269 return get_thread_static_data (thread, offset);
4271 return get_context_static_data (thread->current_appcontext, offset);
4276 mono_get_special_static_data (guint32 offset)
4278 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4287 * LOCKING: requires that threads_mutex is held
4290 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4292 MonoInternalThread *thread = (MonoInternalThread *)value;
4293 OffsetSize *data = (OffsetSize *)user;
4294 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4295 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4298 if (!thread->static_data || !thread->static_data [idx])
4300 ptr = ((char*) thread->static_data [idx]) + off;
4301 mono_gc_bzero_atomic (ptr, data->size);
4305 * LOCKING: requires that threads_mutex is held
4308 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4310 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4315 OffsetSize *data = (OffsetSize *)user;
4316 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4317 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4320 if (!ctx->static_data || !ctx->static_data [idx])
4323 ptr = ((char*) ctx->static_data [idx]) + off;
4324 mono_gc_bzero_atomic (ptr, data->size);
4328 do_free_special_slot (guint32 offset, guint32 size)
4330 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4332 StaticDataInfo *info;
4334 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4335 info = &thread_static_info;
4336 sets = thread_reference_bitmaps;
4338 info = &context_static_info;
4339 sets = context_reference_bitmaps;
4342 guint32 data_offset = offset;
4343 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4344 OffsetSize data = { data_offset, size };
4346 clear_reference_bitmap (sets, data.offset, data.size);
4348 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4349 if (threads != NULL)
4350 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4352 if (contexts != NULL)
4353 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4356 if (!mono_runtime_is_shutting_down ()) {
4357 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4359 item->offset = offset;
4362 item->next = info->freelist;
4363 info->freelist = item;
4368 do_free_special (gpointer key, gpointer value, gpointer data)
4370 MonoClassField *field = (MonoClassField *)key;
4371 guint32 offset = GPOINTER_TO_UINT (value);
4374 size = mono_type_size (field->type, &align);
4375 do_free_special_slot (offset, size);
4379 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4381 mono_threads_lock ();
4383 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4385 mono_threads_unlock ();
4389 static void CALLBACK dummy_apc (ULONG_PTR param)
4395 * mono_thread_execute_interruption
4397 * Performs the operation that the requested thread state requires (abort,
4400 static MonoException*
4401 mono_thread_execute_interruption (void)
4403 MonoInternalThread *thread = mono_thread_internal_current ();
4404 MonoThread *sys_thread = mono_thread_current ();
4406 LOCK_THREAD (thread);
4408 /* MonoThread::interruption_requested can only be changed with atomics */
4409 if (mono_thread_clear_interruption_requested (thread)) {
4410 /* this will consume pending APC calls */
4412 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4414 InterlockedDecrement (&thread_interruption_requested);
4416 /* Clear the interrupted flag of the thread so it can wait again */
4417 mono_thread_info_clear_self_interrupt ();
4420 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4421 if (sys_thread->pending_exception) {
4424 exc = sys_thread->pending_exception;
4425 sys_thread->pending_exception = NULL;
4427 UNLOCK_THREAD (thread);
4429 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4430 UNLOCK_THREAD (thread);
4431 g_assert (sys_thread->pending_exception == NULL);
4432 if (thread->abort_exc == NULL) {
4434 * This might be racy, but it has to be called outside the lock
4435 * since it calls managed code.
4437 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4439 return thread->abort_exc;
4441 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4442 /* calls UNLOCK_THREAD (thread) */
4443 self_suspend_internal ();
4446 else if ((thread->state & ThreadState_StopRequested) != 0) {
4447 /* FIXME: do this through the JIT? */
4449 UNLOCK_THREAD (thread);
4451 mono_thread_exit ();
4453 } else if (thread->thread_interrupt_requested) {
4455 thread->thread_interrupt_requested = FALSE;
4456 UNLOCK_THREAD (thread);
4458 return(mono_get_exception_thread_interrupted ());
4461 UNLOCK_THREAD (thread);
4467 * mono_thread_request_interruption
4469 * A signal handler can call this method to request the interruption of a
4470 * thread. The result of the interruption will depend on the current state of
4471 * the thread. If the result is an exception that needs to be throw, it is
4472 * provided as return value.
4475 mono_thread_request_interruption (gboolean running_managed)
4477 MonoInternalThread *thread = mono_thread_internal_current ();
4479 /* The thread may already be stopping */
4484 if (thread->interrupt_on_stop &&
4485 thread->state & ThreadState_StopRequested &&
4486 thread->state & ThreadState_Background)
4489 if (!mono_thread_set_interruption_requested (thread))
4491 InterlockedIncrement (&thread_interruption_requested);
4493 if (!running_managed || is_running_protected_wrapper ()) {
4494 /* Can't stop while in unmanaged code. Increase the global interruption
4495 request count. When exiting the unmanaged method the count will be
4496 checked and the thread will be interrupted. */
4498 /* this will awake the thread if it is in WaitForSingleObject
4500 /* Our implementation of this function ignores the func argument */
4502 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4504 mono_thread_info_self_interrupt ();
4509 return mono_thread_execute_interruption ();
4513 /*This function should be called by a thread after it has exited all of
4514 * its handle blocks at interruption time.*/
4516 mono_thread_resume_interruption (void)
4518 MonoInternalThread *thread = mono_thread_internal_current ();
4519 gboolean still_aborting;
4521 /* The thread may already be stopping */
4525 LOCK_THREAD (thread);
4526 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4527 UNLOCK_THREAD (thread);
4529 /*This can happen if the protected block called Thread::ResetAbort*/
4530 if (!still_aborting)
4533 if (!mono_thread_set_interruption_requested (thread))
4535 InterlockedIncrement (&thread_interruption_requested);
4537 mono_thread_info_self_interrupt ();
4539 return mono_thread_execute_interruption ();
4542 gboolean mono_thread_interruption_requested ()
4544 if (thread_interruption_requested) {
4545 MonoInternalThread *thread = mono_thread_internal_current ();
4546 /* The thread may already be stopping */
4548 return mono_thread_get_interruption_requested (thread);
4553 static MonoException*
4554 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4556 MonoInternalThread *thread = mono_thread_internal_current ();
4558 /* The thread may already be stopping */
4561 if (!mono_thread_get_interruption_requested (thread))
4563 if (!bypass_abort_protection && is_running_protected_wrapper ())
4566 return mono_thread_execute_interruption ();
4570 * Performs the interruption of the current thread, if one has been requested,
4571 * and the thread is not running a protected wrapper.
4572 * Return the exception which needs to be thrown, if any.
4575 mono_thread_interruption_checkpoint (void)
4577 return mono_thread_interruption_checkpoint_request (FALSE);
4581 * Performs the interruption of the current thread, if one has been requested.
4582 * Return the exception which needs to be thrown, if any.
4585 mono_thread_force_interruption_checkpoint_noraise (void)
4587 return mono_thread_interruption_checkpoint_request (TRUE);
4591 * mono_set_pending_exception:
4593 * Set the pending exception of the current thread to EXC.
4594 * The exception will be thrown when execution returns to managed code.
4597 mono_set_pending_exception (MonoException *exc)
4599 MonoThread *thread = mono_thread_current ();
4601 /* The thread may already be stopping */
4605 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4607 mono_thread_request_interruption (FALSE);
4611 * mono_thread_interruption_request_flag:
4613 * Returns the address of a flag that will be non-zero if an interruption has
4614 * been requested for a thread. The thread to interrupt may not be the current
4615 * thread, so an additional call to mono_thread_interruption_requested() or
4616 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4619 gint32* mono_thread_interruption_request_flag ()
4621 return &thread_interruption_requested;
4625 mono_thread_init_apartment_state (void)
4628 MonoInternalThread* thread = mono_thread_internal_current ();
4630 /* Positive return value indicates success, either
4631 * S_OK if this is first CoInitialize call, or
4632 * S_FALSE if CoInitialize already called, but with same
4633 * threading model. A negative value indicates failure,
4634 * probably due to trying to change the threading model.
4636 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4637 ? COINIT_APARTMENTTHREADED
4638 : COINIT_MULTITHREADED) < 0) {
4639 thread->apartment_state = ThreadApartmentState_Unknown;
4645 mono_thread_cleanup_apartment_state (void)
4648 MonoInternalThread* thread = mono_thread_internal_current ();
4650 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4657 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4659 LOCK_THREAD (thread);
4660 thread->state |= state;
4661 UNLOCK_THREAD (thread);
4665 * mono_thread_test_and_set_state:
4667 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4669 * Returns TRUE is @set was OR'd in.
4672 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4674 LOCK_THREAD (thread);
4676 if ((thread->state & test) != 0) {
4677 UNLOCK_THREAD (thread);
4681 thread->state |= set;
4682 UNLOCK_THREAD (thread);
4688 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4690 LOCK_THREAD (thread);
4691 thread->state &= ~state;
4692 UNLOCK_THREAD (thread);
4696 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4698 gboolean ret = FALSE;
4700 LOCK_THREAD (thread);
4702 if ((thread->state & test) != 0) {
4706 UNLOCK_THREAD (thread);
4712 self_interrupt_thread (void *_unused)
4715 MonoThreadInfo *info;
4717 exc = mono_thread_execute_interruption ();
4719 if (mono_threads_is_coop_enabled ()) {
4720 /* We can return from an async call in coop, as
4721 * it's simply called when exiting the safepoint */
4725 g_error ("%s: we can't resume from an async call", __func__);
4728 info = mono_thread_info_current ();
4730 /* We must use _with_context since we didn't trampoline into the runtime */
4731 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. */
4735 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4739 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4743 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4745 MonoJitInfo **dest = (MonoJitInfo **)data;
4751 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4753 MonoJitInfo *ji = NULL;
4758 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4759 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4760 * where we hold runtime locks.
4762 if (!mono_threads_is_coop_enabled ())
4763 mono_thread_info_set_is_async_context (TRUE);
4764 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4765 if (!mono_threads_is_coop_enabled ())
4766 mono_thread_info_set_is_async_context (FALSE);
4771 MonoInternalThread *thread;
4772 gboolean install_async_abort;
4773 MonoThreadInfoInterruptToken *interrupt_token;
4776 static SuspendThreadResult
4777 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4779 AbortThreadData *data = (AbortThreadData *)ud;
4780 MonoInternalThread *thread = data->thread;
4781 MonoJitInfo *ji = NULL;
4782 gboolean protected_wrapper;
4783 gboolean running_managed;
4785 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4786 return MonoResumeThread;
4788 /*someone is already interrupting it*/
4789 if (!mono_thread_set_interruption_requested (thread))
4790 return MonoResumeThread;
4792 InterlockedIncrement (&thread_interruption_requested);
4794 ji = mono_thread_info_get_last_managed (info);
4795 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4796 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4798 if (!protected_wrapper && running_managed) {
4799 /*We are in managed code*/
4800 /*Set the thread to call */
4801 if (data->install_async_abort)
4802 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4803 return MonoResumeThread;
4806 * This will cause waits to be broken.
4807 * It will also prevent the thread from entering a wait, so if the thread returns
4808 * from the wait before it receives the abort signal, it will just spin in the wait
4809 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4812 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4814 return MonoResumeThread;
4819 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4821 AbortThreadData data;
4823 g_assert (thread != mono_thread_internal_current ());
4825 data.thread = thread;
4826 data.install_async_abort = install_async_abort;
4827 data.interrupt_token = NULL;
4829 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4830 if (data.interrupt_token)
4831 mono_thread_info_finish_interrupt (data.interrupt_token);
4832 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4836 self_abort_internal (MonoError *error)
4842 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4843 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4846 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.
4848 exc = mono_thread_request_interruption (TRUE);
4850 mono_error_set_exception_instance (error, exc);
4852 mono_thread_info_self_interrupt ();
4856 MonoInternalThread *thread;
4858 MonoThreadInfoInterruptToken *interrupt_token;
4859 } SuspendThreadData;
4861 static SuspendThreadResult
4862 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4864 SuspendThreadData *data = (SuspendThreadData *)ud;
4865 MonoInternalThread *thread = data->thread;
4866 MonoJitInfo *ji = NULL;
4867 gboolean protected_wrapper;
4868 gboolean running_managed;
4870 ji = mono_thread_info_get_last_managed (info);
4871 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4872 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4874 if (running_managed && !protected_wrapper) {
4875 if (mono_threads_is_coop_enabled ()) {
4876 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4877 return MonoResumeThread;
4879 thread->state &= ~ThreadState_SuspendRequested;
4880 thread->state |= ThreadState_Suspended;
4881 return KeepSuspended;
4884 if (mono_thread_set_interruption_requested (thread))
4885 InterlockedIncrement (&thread_interruption_requested);
4886 if (data->interrupt)
4887 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4889 return MonoResumeThread;
4893 /* LOCKING: called with @thread synch_cs held, and releases it */
4895 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4897 SuspendThreadData data;
4899 g_assert (thread != mono_thread_internal_current ());
4901 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4903 thread->self_suspended = FALSE;
4905 data.thread = thread;
4906 data.interrupt = interrupt;
4907 data.interrupt_token = NULL;
4909 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4910 if (data.interrupt_token)
4911 mono_thread_info_finish_interrupt (data.interrupt_token);
4913 UNLOCK_THREAD (thread);
4916 /* LOCKING: called with @thread synch_cs held, and releases it */
4918 self_suspend_internal (void)
4920 MonoInternalThread *thread;
4922 MonoOSEventWaitRet res;
4924 thread = mono_thread_internal_current ();
4926 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4928 thread->self_suspended = TRUE;
4930 thread->state &= ~ThreadState_SuspendRequested;
4931 thread->state |= ThreadState_Suspended;
4933 UNLOCK_THREAD (thread);
4935 event = thread->suspended;
4938 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4939 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4944 suspend_for_shutdown_async_call (gpointer unused)
4947 mono_thread_info_yield ();
4950 static SuspendThreadResult
4951 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4953 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4954 return MonoResumeThread;
4958 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4960 g_assert (thread != mono_thread_internal_current ());
4962 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4966 * mono_thread_is_foreign:
4967 * @thread: the thread to query
4969 * This function allows one to determine if a thread was created by the mono runtime and has
4970 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4972 * Returns: TRUE if @thread was not created by the runtime.
4975 mono_thread_is_foreign (MonoThread *thread)
4977 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4978 return info->runtime_thread == FALSE;
4982 * mono_add_joinable_thread:
4984 * Add TID to the list of joinable threads.
4985 * LOCKING: Acquires the threads lock.
4988 mono_threads_add_joinable_thread (gpointer tid)
4992 * We cannot detach from threads because it causes problems like
4993 * 2fd16f60/r114307. So we collect them and join them when
4994 * we have time (in he finalizer thread).
4996 joinable_threads_lock ();
4997 if (!joinable_threads)
4998 joinable_threads = g_hash_table_new (NULL, NULL);
4999 g_hash_table_insert (joinable_threads, tid, tid);
5000 joinable_thread_count ++;
5001 joinable_threads_unlock ();
5003 mono_gc_finalize_notify ();
5008 * mono_threads_join_threads:
5010 * Join all joinable threads. This is called from the finalizer thread.
5011 * LOCKING: Acquires the threads lock.
5014 mono_threads_join_threads (void)
5017 GHashTableIter iter;
5024 if (!joinable_thread_count)
5028 joinable_threads_lock ();
5030 if (g_hash_table_size (joinable_threads)) {
5031 g_hash_table_iter_init (&iter, joinable_threads);
5032 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5033 thread = (pthread_t)tid;
5034 g_hash_table_remove (joinable_threads, key);
5035 joinable_thread_count --;
5038 joinable_threads_unlock ();
5040 if (thread != pthread_self ()) {
5042 /* This shouldn't block */
5043 mono_threads_join_lock ();
5044 mono_native_thread_join (thread);
5045 mono_threads_join_unlock ();
5058 * Wait for thread TID to exit.
5059 * LOCKING: Acquires the threads lock.
5062 mono_thread_join (gpointer tid)
5066 gboolean found = FALSE;
5068 joinable_threads_lock ();
5069 if (!joinable_threads)
5070 joinable_threads = g_hash_table_new (NULL, NULL);
5071 if (g_hash_table_lookup (joinable_threads, tid)) {
5072 g_hash_table_remove (joinable_threads, tid);
5073 joinable_thread_count --;
5076 joinable_threads_unlock ();
5079 thread = (pthread_t)tid;
5081 mono_native_thread_join (thread);
5087 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5089 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5090 mono_thread_interruption_checkpoint ();
5094 mono_thread_internal_unhandled_exception (MonoObject* exc)
5096 MonoClass *klass = exc->vtable->klass;
5097 if (is_threadabort_exception (klass)) {
5098 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5099 } else if (!is_appdomainunloaded_exception (klass)
5100 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5101 mono_unhandled_exception (exc);
5102 if (mono_environment_exitcode_get () == 1) {
5103 mono_environment_exitcode_set (255);
5104 mono_invoke_unhandled_exception_hook (exc);
5105 g_assert_not_reached ();
5111 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5114 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5115 mono_error_set_pending_exception (&error);
5119 * mono_threads_attach_coop: called by native->managed wrappers
5123 * - @return: the original domain which needs to be restored, or NULL.
5126 * - @dummy: contains the original domain
5127 * - @return: a cookie containing current MonoThreadInfo*.
5130 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5133 gboolean fresh_thread = FALSE;
5136 /* Happens when called from AOTed code which is only used in the root domain. */
5137 domain = mono_get_root_domain ();
5142 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5143 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5144 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5145 * we're only responsible for making the cookie. */
5146 if (mono_threads_is_coop_enabled ()) {
5147 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5148 fresh_thread = !info || !mono_thread_info_is_live (info);
5151 if (!mono_thread_internal_current ()) {
5152 mono_thread_attach_full (domain, FALSE);
5155 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5158 orig = mono_domain_get ();
5160 mono_domain_set (domain, TRUE);
5162 if (!mono_threads_is_coop_enabled ())
5163 return orig != domain ? orig : NULL;
5167 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5168 * return the right cookie. */
5169 return mono_threads_enter_gc_unsafe_region_cookie ();
5172 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5173 return mono_threads_enter_gc_unsafe_region (dummy);
5178 * mono_threads_detach_coop: called by native->managed wrappers
5181 * - @cookie: the original domain which needs to be restored, or NULL.
5185 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5186 * - @dummy: contains the original domain
5189 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5191 MonoDomain *domain, *orig;
5193 if (!mono_threads_is_coop_enabled ()) {
5194 orig = (MonoDomain*) cookie;
5196 mono_domain_set (orig, TRUE);
5198 orig = (MonoDomain*) *dummy;
5200 domain = mono_domain_get ();
5203 /* it won't do anything if cookie is NULL
5204 * thread state RUNNING -> (RUNNING|BLOCKING) */
5205 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5207 if (orig != domain) {
5209 mono_domain_unset ();
5211 mono_domain_set (orig, TRUE);
5217 mono_thread_try_resume_interruption (void)
5219 MonoInternalThread *thread;
5221 thread = mono_thread_internal_current ();
5222 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
5224 if (mono_thread_get_abort_prot_block_count (thread) > 0 || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5227 return mono_thread_resume_interruption ();
5231 /* Returns TRUE if the current thread is ready to be interrupted. */
5233 mono_threads_is_ready_to_be_interrupted (void)
5235 MonoInternalThread *thread;
5237 thread = mono_thread_internal_current ();
5238 LOCK_THREAD (thread);
5239 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5240 UNLOCK_THREAD (thread);
5244 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5245 UNLOCK_THREAD (thread);
5249 UNLOCK_THREAD (thread);
5255 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5257 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5259 if (internal->thread_info) {
5260 g_string_append (text, ", state : ");
5261 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5264 if (internal->owned_mutexes) {
5267 g_string_append (text, ", owns : [");
5268 for (i = 0; i < internal->owned_mutexes->len; i++)
5269 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5270 g_string_append (text, "]");
5275 mono_thread_internal_is_current (MonoInternalThread *internal)
5277 g_assert (internal);
5278 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));