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/mono-debug-debugger.h>
33 #include <mono/utils/monobitset.h>
34 #include <mono/utils/mono-compiler.h>
35 #include <mono/utils/mono-mmap.h>
36 #include <mono/utils/mono-membar.h>
37 #include <mono/utils/mono-time.h>
38 #include <mono/utils/mono-threads.h>
39 #include <mono/utils/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 /* Number of cached culture objects in the MonoThread->cached_culture_info array
118 * (per-type): we use the first NUM entries for CultureInfo and the last for
119 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
121 #define NUM_CACHED_CULTURES 4
122 #define CULTURES_START_IDX 0
123 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
125 /* Controls access to the 'threads' hash table */
126 static void mono_threads_lock (void);
127 static void mono_threads_unlock (void);
128 static MonoCoopMutex threads_mutex;
130 /* Controls access to the 'joinable_threads' hash table */
131 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
132 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
133 static mono_mutex_t joinable_threads_mutex;
135 /* Holds current status of static data heap */
136 static StaticDataInfo thread_static_info;
137 static StaticDataInfo context_static_info;
139 /* The hash of existing threads (key is thread ID, value is
140 * MonoInternalThread*) that need joining before exit
142 static MonoGHashTable *threads=NULL;
144 /* List of app context GC handles.
145 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
147 static GHashTable *contexts = NULL;
149 /* Cleanup queue for contexts. */
150 static MonoReferenceQueue *context_queue;
153 * Threads which are starting up and they are not in the 'threads' hash yet.
154 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
155 * Protected by mono_threads_lock ().
157 static MonoGHashTable *threads_starting_up = NULL;
160 /* Protected by the threads lock */
161 static GHashTable *joinable_threads;
162 static int joinable_thread_count;
164 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
165 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
167 /* function called at thread start */
168 static MonoThreadStartCB mono_thread_start_cb = NULL;
170 /* function called at thread attach */
171 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
173 /* function called at thread cleanup */
174 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
176 /* The default stack size for each thread */
177 static guint32 default_stacksize = 0;
178 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
180 static void context_adjust_static_data (MonoAppContext *ctx);
181 static void mono_free_static_data (gpointer* static_data);
182 static void mono_init_static_data_info (StaticDataInfo *static_data);
183 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
184 static gboolean mono_thread_resume (MonoInternalThread* thread);
185 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
186 static void self_abort_internal (MonoError *error);
187 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
188 static void self_suspend_internal (void);
190 static MonoException* mono_thread_execute_interruption (void);
191 static void ref_stack_destroy (gpointer rs);
193 /* Spin lock for InterlockedXXX 64 bit functions */
194 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
195 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
196 static mono_mutex_t interlocked_mutex;
198 /* global count of thread interruptions requested */
199 static gint32 thread_interruption_requested = 0;
201 /* Event signaled when a thread changes its background mode */
202 static MonoOSEvent background_change_event;
204 static gboolean shutting_down = FALSE;
206 static gint32 managed_thread_id_counter = 0;
208 /* Class lazy loading functions */
209 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
212 mono_threads_lock (void)
214 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
218 mono_threads_unlock (void)
220 mono_locks_coop_release (&threads_mutex, ThreadsLock);
225 get_next_managed_thread_id (void)
227 return InterlockedIncrement (&managed_thread_id_counter);
231 INTERRUPT_REQUESTED_BIT = 0x1,
232 INTERRUPT_REQUEST_DEFERRED_BIT = 0x2,
233 ABORT_PROT_BLOCK_SHIFT = 2,
234 ABORT_PROT_BLOCK_BITS = 8,
235 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
239 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
241 gsize state = thread->thread_state;
242 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
246 verify_thread_state (gsize state)
248 //can't have both INTERRUPT_REQUESTED_BIT and INTERRUPT_REQUEST_DEFERRED_BIT set at the same time
249 g_assert ((state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) != (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT));
251 //XXX This would be nice to be true, but can happen due to self-aborts (and possibly set-pending-exception)
252 //if prot_count > 0, INTERRUPT_REQUESTED_BIT must never be set
253 // int prot_count = (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
254 // g_assert (!(prot_count > 0 && (state & INTERRUPT_REQUESTED_BIT)));
258 mono_threads_begin_abort_protected_block (void)
260 MonoInternalThread *thread = mono_thread_internal_current ();
261 gsize old_state, new_state;
263 old_state = thread->thread_state;
264 verify_thread_state (old_state);
266 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
269 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) {
270 if (old_state & INTERRUPT_REQUESTED_BIT)
271 printf ("begin prot happy as it demoted interrupt to deferred interrupt\n");
272 new_state |= INTERRUPT_REQUEST_DEFERRED_BIT;
275 //bounds check abort_prot_count
276 g_assert (new_val > 0);
277 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
278 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
280 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
284 mono_threads_end_abort_protected_block (void)
286 MonoInternalThread *thread = mono_thread_internal_current ();
287 gsize old_state, new_state;
289 old_state = thread->thread_state;
290 verify_thread_state (old_state);
292 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
295 if ((old_state & INTERRUPT_REQUEST_DEFERRED_BIT) && new_val == 0) {
296 printf ("end abort on alert, promoted deferred to pront interrupt\n");
297 new_state |= INTERRUPT_REQUESTED_BIT;
300 //bounds check abort_prot_count
301 g_assert (new_val >= 0);
302 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
303 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
305 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
306 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
310 //Don't use this function, use inc/dec below
312 mono_thread_abort_prot_block_count_add (MonoInternalThread *thread, int val)
314 gsize old_state, new_state;
316 old_state = thread->thread_state;
317 verify_thread_state (old_state);
319 int new_val = val + ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
320 //bounds check abort_prot_count
321 g_assert (new_val >= 0);
322 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
323 new_state = (old_state & ~ABORT_PROT_BLOCK_MASK) | (new_val << ABORT_PROT_BLOCK_SHIFT);
325 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
329 mono_thread_inc_abort_prot_block_count (MonoInternalThread *thread)
331 mono_thread_abort_prot_block_count_add (thread, 1);
335 mono_thread_dec_abort_prot_block_count (MonoInternalThread *thread)
337 mono_thread_abort_prot_block_count_add (thread, -1);
341 mono_thread_get_interruption_requested (MonoInternalThread *thread)
343 gsize state = thread->thread_state;
344 return (state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
347 /* Returns TRUE is there was a state change */
349 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
351 gsize old_state, new_state;
353 old_state = thread->thread_state;
354 verify_thread_state (old_state);
357 if (!(old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)))
359 new_state = old_state & ~(INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT);
360 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
364 /* Returns TRUE is there was a state change */
366 mono_thread_set_interruption_requested (MonoInternalThread *thread)
368 //always force when the current thread is doing it to itself.
369 gboolean force_interrupt = thread == mono_thread_internal_current ();
370 gsize old_state, new_state;
372 old_state = thread->thread_state;
373 verify_thread_state (old_state);
375 int prot_count = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
377 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT))
380 //If there's an outstanding prot block, we queue it
381 if (prot_count && !force_interrupt) {
382 printf ("set interrupt unhappy, as it's only putting a deferred req %d\n", force_interrupt);
383 new_state = old_state | INTERRUPT_REQUEST_DEFERRED_BIT;
385 new_state = old_state | INTERRUPT_REQUESTED_BIT;
386 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
388 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
391 static inline MonoNativeThreadId
392 thread_get_tid (MonoInternalThread *thread)
394 /* We store the tid as a guint64 to keep the object layout constant between platforms */
395 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
398 static void ensure_synch_cs_set (MonoInternalThread *thread)
400 MonoCoopMutex *synch_cs;
402 if (thread->synch_cs != NULL) {
406 synch_cs = g_new0 (MonoCoopMutex, 1);
407 mono_coop_mutex_init_recursive (synch_cs);
409 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
410 synch_cs, NULL) != NULL) {
411 /* Another thread must have installed this CS */
412 mono_coop_mutex_destroy (synch_cs);
418 lock_thread (MonoInternalThread *thread)
420 if (!thread->synch_cs)
421 ensure_synch_cs_set (thread);
423 g_assert (thread->synch_cs);
425 mono_coop_mutex_lock (thread->synch_cs);
429 unlock_thread (MonoInternalThread *thread)
431 mono_coop_mutex_unlock (thread->synch_cs);
434 static inline gboolean
435 is_appdomainunloaded_exception (MonoClass *klass)
437 return klass == mono_class_get_appdomain_unloaded_exception_class ();
440 static inline gboolean
441 is_threadabort_exception (MonoClass *klass)
443 return klass == mono_defaults.threadabortexception_class;
447 * A special static data offset (guint32) consists of 3 parts:
449 * [0] 6-bit index into the array of chunks.
450 * [6] 25-bit offset into the array.
451 * [31] Bit indicating thread or context static.
456 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
467 } SpecialStaticOffset;
469 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
470 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
472 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
473 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
474 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
475 (((SpecialStaticOffset *) &(x))->fields.f)
478 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
480 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
482 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
483 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
485 return ((char *) thread->static_data [idx]) + off;
489 get_context_static_data (MonoAppContext *ctx, guint32 offset)
491 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
493 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
494 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
496 return ((char *) ctx->static_data [idx]) + off;
500 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
502 static MonoClassField *current_thread_field = NULL;
506 if (!current_thread_field) {
507 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
508 g_assert (current_thread_field);
511 mono_class_vtable (domain, mono_defaults.thread_class);
512 mono_domain_lock (domain);
513 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
514 mono_domain_unlock (domain);
517 return (MonoThread **)get_thread_static_data (thread, offset);
521 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
523 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
525 g_assert (current->obj.vtable->domain == domain);
527 g_assert (!*current_thread_ptr);
528 *current_thread_ptr = current;
532 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
538 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
541 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
542 /* only possible failure mode is OOM, from which we don't expect to recover. */
543 mono_error_assert_ok (&error);
545 MONO_OBJECT_SETREF (thread, internal_thread, internal);
550 static MonoInternalThread*
551 create_internal_thread_object (void)
554 MonoInternalThread *thread;
557 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
558 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
559 /* only possible failure mode is OOM, from which we don't exect to recover */
560 mono_error_assert_ok (&error);
562 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
563 mono_coop_mutex_init_recursive (thread->synch_cs);
565 thread->apartment_state = ThreadApartmentState_Unknown;
566 thread->managed_id = get_next_managed_thread_id ();
567 if (mono_gc_is_moving ()) {
568 thread->thread_pinning_ref = thread;
569 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
572 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
574 thread->suspended = g_new0 (MonoOSEvent, 1);
575 mono_os_event_init (thread->suspended, TRUE);
581 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
585 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
586 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
587 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
592 g_assert (internal->native_handle);
594 res = SetThreadPriority (internal->native_handle, priority - 2);
596 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
597 #else /* HOST_WIN32 */
600 struct sched_param param;
603 tid = thread_get_tid (internal);
605 res = pthread_getschedparam (tid, &policy, ¶m);
607 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
609 #ifdef _POSIX_PRIORITY_SCHEDULING
612 /* Necessary to get valid priority range */
614 min = sched_get_priority_min (policy);
615 max = sched_get_priority_max (policy);
617 if (max > 0 && min >= 0 && max > min) {
618 double srange, drange, sposition, dposition;
619 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
621 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
622 dposition = (sposition / srange) * drange;
623 param.sched_priority = (int)(dposition + min);
630 param.sched_priority = 50;
636 param.sched_priority = 0;
639 g_warning ("%s: unknown policy %d", __func__, policy);
644 res = pthread_setschedparam (tid, policy, ¶m);
647 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
650 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
652 #endif /* HOST_WIN32 */
656 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
659 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain, gsize *stack_ptr)
661 MonoThreadInfo *info;
662 MonoInternalThread *internal;
663 MonoDomain *domain, *root_domain;
667 info = mono_thread_info_current ();
669 internal = thread->internal_thread;
670 internal->handle = mono_threads_open_thread_handle (info->handle);
672 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
674 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
675 internal->thread_info = info;
676 internal->small_id = info->small_id;
677 internal->stack_ptr = stack_ptr;
679 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
681 SET_CURRENT_OBJECT (internal);
683 domain = mono_object_domain (thread);
685 mono_thread_push_appdomain_ref (domain);
686 if (!mono_domain_set (domain, force_domain)) {
687 mono_thread_pop_appdomain_ref ();
691 mono_threads_lock ();
693 if (threads_starting_up)
694 mono_g_hash_table_remove (threads_starting_up, thread);
696 if (shutting_down && !force_attach) {
697 mono_threads_unlock ();
702 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
703 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
706 /* We don't need to duplicate thread->handle, because it is
707 * only closed when the thread object is finalized by the GC. */
708 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
710 /* We have to do this here because mono_thread_start_cb
711 * requires that root_domain_thread is set up. */
712 if (thread_static_info.offset || thread_static_info.idx > 0) {
713 /* get the current allocated size */
714 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
715 mono_alloc_static_data (&internal->static_data, offset, TRUE);
718 mono_threads_unlock ();
720 root_domain = mono_get_root_domain ();
722 g_assert (!internal->root_domain_thread);
723 if (domain != root_domain)
724 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
726 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
728 if (domain != root_domain)
729 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
731 set_current_thread_for_domain (domain, internal, thread);
733 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
741 MonoObject *start_delegate;
742 MonoObject *start_delegate_arg;
743 MonoThreadStart start_func;
744 gpointer start_func_arg;
746 MonoCoopSem registered;
749 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
752 MonoThreadStart start_func;
753 void *start_func_arg;
756 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
760 MonoInternalThread *internal;
761 MonoObject *start_delegate;
762 MonoObject *start_delegate_arg;
765 thread = start_info->thread;
766 internal = thread->internal_thread;
767 domain = mono_object_domain (start_info->thread);
769 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
771 if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
772 start_info->failed = TRUE;
774 mono_coop_sem_post (&start_info->registered);
776 if (InterlockedDecrement (&start_info->ref) == 0) {
777 mono_coop_sem_destroy (&start_info->registered);
784 mono_thread_internal_set_priority (internal, internal->priority);
788 start_delegate = start_info->start_delegate;
789 start_delegate_arg = start_info->start_delegate_arg;
790 start_func = start_info->start_func;
791 start_func_arg = start_info->start_func_arg;
793 /* This MUST be called before any managed code can be
794 * executed, as it calls the callback function that (for the
795 * jit) sets the lmf marker.
798 if (mono_thread_start_cb)
799 mono_thread_start_cb (tid, stack_ptr, start_func);
801 /* On 2.0 profile (and higher), set explicitly since state might have been
803 if (internal->apartment_state == ThreadApartmentState_Unknown)
804 internal->apartment_state = ThreadApartmentState_MTA;
806 mono_thread_init_apartment_state ();
808 /* Let the thread that called Start() know we're ready */
809 mono_coop_sem_post (&start_info->registered);
811 if (InterlockedDecrement (&start_info->ref) == 0) {
812 mono_coop_sem_destroy (&start_info->registered);
816 /* start_info is not valid anymore */
820 * Call this after calling start_notify, since the profiler callback might want
821 * to lock the thread, and the lock is held by thread_start () which waits for
824 mono_profiler_thread_start (tid);
826 /* if the name was set before starting, we didn't invoke the profiler callback */
827 if (internal->name) {
828 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
829 mono_profiler_thread_name (internal->tid, tname);
830 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
834 /* start_func is set only for unmanaged start functions */
836 start_func (start_func_arg);
840 g_assert (start_delegate != NULL);
842 /* we may want to handle the exception here. See comment below on unhandled exceptions */
843 args [0] = (gpointer) start_delegate_arg;
844 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
846 if (!mono_error_ok (&error)) {
847 MonoException *ex = mono_error_convert_to_exception (&error);
849 g_assert (ex != NULL);
850 MonoClass *klass = mono_object_get_class (&ex->object);
851 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
852 !is_threadabort_exception (klass)) {
853 mono_unhandled_exception (&ex->object);
854 mono_invoke_unhandled_exception_hook (&ex->object);
855 g_assert_not_reached ();
858 mono_error_cleanup (&error);
862 /* If the thread calls ExitThread at all, this remaining code
863 * will not be executed, but the main thread will eventually
864 * call mono_thread_detach_internal() on this thread's behalf.
867 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
869 /* Do any cleanup needed for apartment state. This
870 * cannot be done in mono_thread_detach_internal since
871 * mono_thread_detach_internal could be called for a
872 * thread other than the current thread.
873 * mono_thread_cleanup_apartment_state cleans up apartment
874 * for the current thead */
875 mono_thread_cleanup_apartment_state ();
877 mono_thread_detach_internal (internal);
884 static gsize WINAPI start_wrapper(void *data)
886 volatile gsize dummy;
888 return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
894 * Common thread creation code.
895 * LOCKING: Acquires the threads lock.
898 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
899 gboolean threadpool_thread, guint32 stack_size, MonoError *error)
901 StartInfo *start_info = NULL;
902 MonoThreadHandle *thread_handle;
903 MonoNativeThreadId tid;
905 gsize stack_set_size;
908 g_assert (!start_func && !start_func_arg);
910 g_assert (!start_delegate);
913 * Join joinable threads to prevent running out of threads since the finalizer
914 * thread might be blocked/backlogged.
916 mono_threads_join_threads ();
918 mono_error_init (error);
920 mono_threads_lock ();
922 mono_threads_unlock ();
925 if (threads_starting_up == NULL) {
926 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
927 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
929 mono_g_hash_table_insert (threads_starting_up, thread, thread);
930 mono_threads_unlock ();
932 internal->threadpool_thread = threadpool_thread;
933 if (threadpool_thread)
934 mono_thread_set_state (internal, ThreadState_Background);
936 start_info = g_new0 (StartInfo, 1);
938 start_info->thread = thread;
939 start_info->start_delegate = start_delegate;
940 start_info->start_delegate_arg = thread->start_obj;
941 start_info->start_func = start_func;
942 start_info->start_func_arg = start_func_arg;
943 start_info->failed = FALSE;
944 mono_coop_sem_init (&start_info->registered, 0);
947 stack_set_size = default_stacksize_for_thread (internal);
951 thread_handle = mono_threads_create_thread (start_wrapper, start_info, &stack_set_size, &tid);
953 if (thread_handle == NULL) {
954 /* The thread couldn't be created, so set an exception */
955 mono_threads_lock ();
956 mono_g_hash_table_remove (threads_starting_up, thread);
957 mono_threads_unlock ();
958 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
959 /* ref is not going to be decremented in start_wrapper_internal */
960 InterlockedDecrement (&start_info->ref);
965 internal->stack_size = (int) stack_set_size;
967 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
970 * Wait for the thread to set up its TLS data etc, so
971 * theres no potential race condition if someone tries
972 * to look up the data believing the thread has
976 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
978 mono_threads_close_thread_handle (thread_handle);
980 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));
982 ret = !start_info->failed;
985 if (InterlockedDecrement (&start_info->ref) == 0) {
986 mono_coop_sem_destroy (&start_info->registered);
993 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
995 if (mono_thread_start_cb) {
996 mono_thread_start_cb (tid, stack_start, func);
1000 void mono_threads_set_default_stacksize (guint32 stacksize)
1002 default_stacksize = stacksize;
1005 guint32 mono_threads_get_default_stacksize (void)
1007 return default_stacksize;
1011 * mono_thread_create_internal:
1013 * ARG should not be a GC reference.
1016 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
1019 MonoInternalThread *internal;
1022 mono_error_init (error);
1024 internal = create_internal_thread_object ();
1026 thread = create_thread_object (domain, internal);
1028 LOCK_THREAD (internal);
1030 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
1031 return_val_if_nok (error, NULL);
1033 UNLOCK_THREAD (internal);
1039 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1042 if (!mono_thread_create_checked (domain, func, arg, &error))
1043 mono_error_cleanup (&error);
1047 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1049 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
1053 mono_thread_attach (MonoDomain *domain)
1055 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1061 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1063 MonoInternalThread *internal;
1065 MonoNativeThreadId tid;
1068 if (mono_thread_internal_current_is_attached ()) {
1069 if (domain != mono_domain_get ())
1070 mono_domain_set (domain, TRUE);
1071 /* Already attached */
1072 return mono_thread_current ();
1075 if (!mono_gc_register_thread (&domain)) {
1076 g_error ("Thread %"G_GSIZE_FORMAT" calling into managed code is not registered with the GC. On UNIX, this can be fixed by #include-ing <gc.h> before <pthread.h> in the file containing the thread creation code.", mono_native_thread_id_get ());
1079 tid=mono_native_thread_id_get ();
1081 internal = create_internal_thread_object ();
1083 thread = create_thread_object (domain, internal);
1085 if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
1086 /* Mono is shutting down, so just wait for the end */
1088 mono_thread_info_sleep (10000, NULL);
1091 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1093 if (mono_thread_attach_cb) {
1097 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1100 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1102 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1105 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1106 if (!mono_thread_info_current ()->tools_thread)
1107 // FIXME: Need a separate callback
1108 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1114 mono_thread_detach_internal (MonoInternalThread *thread)
1118 g_assert (thread != NULL);
1120 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1123 mono_w32mutex_abandon ();
1126 if (thread->abort_state_handle) {
1127 mono_gchandle_free (thread->abort_state_handle);
1128 thread->abort_state_handle = 0;
1131 thread->abort_exc = NULL;
1132 thread->current_appcontext = NULL;
1135 * This is necessary because otherwise we might have
1136 * cross-domain references which will not get cleaned up when
1137 * the target domain is unloaded.
1139 if (thread->cached_culture_info) {
1141 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
1142 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
1146 * thread->synch_cs can be NULL if this was called after
1147 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1148 * This can happen only during shutdown.
1149 * The shutting_down flag is not always set, so we can't assert on it.
1151 if (thread->synch_cs)
1152 LOCK_THREAD (thread);
1154 thread->state |= ThreadState_Stopped;
1155 thread->state &= ~ThreadState_Background;
1157 if (thread->synch_cs)
1158 UNLOCK_THREAD (thread);
1161 An interruption request has leaked to cleanup. Adjust the global counter.
1163 This can happen is the abort source thread finds the abortee (this) thread
1164 in unmanaged code. If this thread never trips back to managed code or check
1165 the local flag it will be left set and positively unbalance the global counter.
1167 Leaving the counter unbalanced will cause a performance degradation since all threads
1168 will now keep checking their local flags all the time.
1170 if (mono_thread_clear_interruption_requested (thread))
1171 InterlockedDecrement (&thread_interruption_requested);
1173 mono_threads_lock ();
1177 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1178 /* We have to check whether the thread object for the
1179 * tid is still the same in the table because the
1180 * thread might have been destroyed and the tid reused
1181 * in the meantime, in which case the tid would be in
1182 * the table, but with another thread object.
1186 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1190 mono_threads_unlock ();
1192 /* Don't close the handle here, wait for the object finalizer
1193 * to do it. Otherwise, the following race condition applies:
1195 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1197 * 2) Some other handle is reassigned the same slot
1199 * 3) Another thread tries to join the first thread, and
1200 * blocks waiting for the reassigned handle to be signalled
1201 * (which might never happen). This is possible, because the
1202 * thread calling Join() still has a reference to the first
1206 /* if the thread is not in the hash it has been removed already */
1208 mono_domain_unset ();
1209 mono_memory_barrier ();
1211 if (mono_thread_cleanup_fn)
1212 mono_thread_cleanup_fn (thread_get_tid (thread));
1217 mono_release_type_locks (thread);
1219 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1220 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1221 mono_profiler_thread_end (thread->tid);
1223 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1226 * This will signal async signal handlers that the thread has exited.
1227 * The profiler callback needs this to be set, so it cannot be done earlier.
1229 mono_domain_unset ();
1230 mono_memory_barrier ();
1232 if (thread == mono_thread_internal_current ())
1233 mono_thread_pop_appdomain_ref ();
1235 thread->cached_culture_info = NULL;
1237 mono_free_static_data (thread->static_data);
1238 thread->static_data = NULL;
1239 ref_stack_destroy (thread->appdomain_refs);
1240 thread->appdomain_refs = NULL;
1242 g_assert (thread->suspended);
1243 mono_os_event_destroy (thread->suspended);
1244 g_free (thread->suspended);
1245 thread->suspended = NULL;
1247 if (mono_thread_cleanup_fn)
1248 mono_thread_cleanup_fn (thread_get_tid (thread));
1250 mono_memory_barrier ();
1252 if (mono_gc_is_moving ()) {
1253 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1254 thread->thread_pinning_ref = NULL;
1258 SET_CURRENT_OBJECT (NULL);
1259 mono_domain_unset ();
1261 /* Don't need to close the handle to this thread, even though we took a
1262 * reference in mono_thread_attach (), because the GC will do it
1263 * when the Thread object is finalised.
1268 mono_thread_detach (MonoThread *thread)
1271 mono_thread_detach_internal (thread->internal_thread);
1275 * mono_thread_detach_if_exiting:
1277 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1278 * This should be used at the end of embedding code which calls into managed code, and which
1279 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1282 mono_thread_detach_if_exiting (void)
1284 if (mono_thread_info_is_exiting ()) {
1285 MonoInternalThread *thread;
1287 thread = mono_thread_internal_current ();
1289 mono_thread_detach_internal (thread);
1290 mono_thread_info_detach ();
1298 mono_thread_internal_current_is_attached (void)
1300 MonoInternalThread *internal;
1302 internal = GET_CURRENT_OBJECT ();
1310 mono_thread_exit (void)
1312 MonoInternalThread *thread = mono_thread_internal_current ();
1314 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1316 mono_thread_detach_internal (thread);
1318 /* we could add a callback here for embedders to use. */
1319 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1320 exit (mono_environment_exitcode_get ());
1322 mono_thread_info_exit (0);
1326 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1328 MonoInternalThread *internal;
1330 internal = create_internal_thread_object ();
1332 internal->state = ThreadState_Unstarted;
1334 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1338 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1340 return mono_thread_current ();
1344 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1348 MonoInternalThread *internal;
1351 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1353 if (!this_obj->internal_thread)
1354 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1355 internal = this_obj->internal_thread;
1357 LOCK_THREAD (internal);
1359 if ((internal->state & ThreadState_Unstarted) == 0) {
1360 UNLOCK_THREAD (internal);
1361 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1365 if ((internal->state & ThreadState_Aborted) != 0) {
1366 UNLOCK_THREAD (internal);
1370 res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1372 mono_error_cleanup (&error);
1373 UNLOCK_THREAD (internal);
1377 internal->state &= ~ThreadState_Unstarted;
1379 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1381 UNLOCK_THREAD (internal);
1382 return internal->handle;
1386 * This is called from the finalizer of the internal thread object.
1389 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1391 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1394 * Since threads keep a reference to their thread object while running, by
1395 * the time this function is called, the thread has already exited/detached,
1396 * i.e. mono_thread_detach_internal () has ran. The exception is during
1397 * shutdown, when mono_thread_detach_internal () can be called after this.
1399 if (this_obj->handle) {
1400 mono_threads_close_thread_handle (this_obj->handle);
1401 this_obj->handle = NULL;
1405 CloseHandle (this_obj->native_handle);
1408 if (this_obj->synch_cs) {
1409 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1410 this_obj->synch_cs = NULL;
1411 mono_coop_mutex_destroy (synch_cs);
1415 if (this_obj->name) {
1416 void *name = this_obj->name;
1417 this_obj->name = NULL;
1423 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1426 MonoInternalThread *thread = mono_thread_internal_current ();
1428 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1430 if (mono_thread_current_check_pending_interrupt ())
1434 gboolean alerted = FALSE;
1436 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1438 res = mono_thread_info_sleep (ms, &alerted);
1440 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1443 MonoException* exc = mono_thread_execute_interruption ();
1445 mono_raise_exception (exc);
1447 // FIXME: !MONO_INFINITE_WAIT
1448 if (ms != MONO_INFINITE_WAIT)
1457 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1462 ves_icall_System_Threading_Thread_GetDomainID (void)
1464 return mono_domain_get()->domain_id;
1468 ves_icall_System_Threading_Thread_Yield (void)
1470 return mono_thread_info_yield ();
1474 * mono_thread_get_name:
1476 * Return the name of the thread. NAME_LEN is set to the length of the name.
1477 * Return NULL if the thread has no name. The returned memory is owned by the
1481 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1485 LOCK_THREAD (this_obj);
1487 if (!this_obj->name) {
1491 *name_len = this_obj->name_len;
1492 res = g_new (gunichar2, this_obj->name_len);
1493 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1496 UNLOCK_THREAD (this_obj);
1502 * mono_thread_get_name_utf8:
1504 * Return the name of the thread in UTF-8.
1505 * Return NULL if the thread has no name.
1506 * The returned memory is owned by the caller.
1509 mono_thread_get_name_utf8 (MonoThread *thread)
1514 MonoInternalThread *internal = thread->internal_thread;
1515 if (internal == NULL)
1518 LOCK_THREAD (internal);
1520 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1522 UNLOCK_THREAD (internal);
1528 * mono_thread_get_managed_id:
1530 * Return the Thread.ManagedThreadId value of `thread`.
1531 * Returns -1 if `thread` is NULL.
1534 mono_thread_get_managed_id (MonoThread *thread)
1539 MonoInternalThread *internal = thread->internal_thread;
1540 if (internal == NULL)
1543 int32_t id = internal->managed_id;
1549 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1554 mono_error_init (&error);
1556 LOCK_THREAD (this_obj);
1558 if (!this_obj->name)
1561 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1563 UNLOCK_THREAD (this_obj);
1565 if (mono_error_set_pending_exception (&error))
1572 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1574 LOCK_THREAD (this_obj);
1576 mono_error_init (error);
1579 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1580 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1581 UNLOCK_THREAD (this_obj);
1583 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1586 if (this_obj->name) {
1587 g_free (this_obj->name);
1588 this_obj->name_len = 0;
1591 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1592 this_obj->name_len = mono_string_length (name);
1595 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1598 this_obj->name = NULL;
1601 UNLOCK_THREAD (this_obj);
1603 if (this_obj->name && this_obj->tid) {
1604 char *tname = mono_string_to_utf8_checked (name, error);
1605 return_if_nok (error);
1606 mono_profiler_thread_name (this_obj->tid, tname);
1607 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1613 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1616 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1617 mono_error_set_pending_exception (&error);
1621 * ves_icall_System_Threading_Thread_GetPriority_internal:
1622 * @param this_obj: The MonoInternalThread on which to operate.
1624 * Gets the priority of the given thread.
1625 * @return: The priority of the given thread.
1628 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1631 MonoInternalThread *internal = this_obj->internal_thread;
1633 LOCK_THREAD (internal);
1634 priority = internal->priority;
1635 UNLOCK_THREAD (internal);
1641 * ves_icall_System_Threading_Thread_SetPriority_internal:
1642 * @param this_obj: The MonoInternalThread on which to operate.
1643 * @param priority: The priority to set.
1645 * Sets the priority of the given thread.
1648 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1650 MonoInternalThread *internal = this_obj->internal_thread;
1652 LOCK_THREAD (internal);
1653 internal->priority = priority;
1654 if (internal->thread_info != NULL)
1655 mono_thread_internal_set_priority (internal, priority);
1656 UNLOCK_THREAD (internal);
1659 /* If the array is already in the requested domain, we just return it,
1660 otherwise we return a copy in that domain. */
1662 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1666 mono_error_init (error);
1670 if (mono_object_domain (arr) == domain)
1673 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1674 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1679 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1682 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1683 mono_error_set_pending_exception (&error);
1688 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1691 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1692 mono_error_set_pending_exception (&error);
1697 mono_thread_current (void)
1699 MonoDomain *domain = mono_domain_get ();
1700 MonoInternalThread *internal = mono_thread_internal_current ();
1701 MonoThread **current_thread_ptr;
1703 g_assert (internal);
1704 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1706 if (!*current_thread_ptr) {
1707 g_assert (domain != mono_get_root_domain ());
1708 *current_thread_ptr = create_thread_object (domain, internal);
1710 return *current_thread_ptr;
1713 /* Return the thread object belonging to INTERNAL in the current domain */
1715 mono_thread_current_for_thread (MonoInternalThread *internal)
1717 MonoDomain *domain = mono_domain_get ();
1718 MonoThread **current_thread_ptr;
1720 g_assert (internal);
1721 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1723 if (!*current_thread_ptr) {
1724 g_assert (domain != mono_get_root_domain ());
1725 *current_thread_ptr = create_thread_object (domain, internal);
1727 return *current_thread_ptr;
1731 mono_thread_internal_current (void)
1733 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1734 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1738 static MonoThreadInfoWaitRet
1739 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1742 MonoThreadInfoWaitRet ret;
1747 mono_error_init (error);
1749 start = (ms == -1) ? 0 : mono_msec_ticks ();
1752 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1755 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1758 exc = mono_thread_execute_interruption ();
1760 mono_error_set_exception_instance (error, exc);
1767 /* Re-calculate ms according to the time passed */
1768 diff_ms = (gint32)(mono_msec_ticks () - start);
1769 if (diff_ms >= ms) {
1770 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1773 wait = ms - diff_ms;
1780 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1782 MonoInternalThread *thread = this_obj->internal_thread;
1783 MonoThreadHandle *handle = thread->handle;
1784 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1788 if (mono_thread_current_check_pending_interrupt ())
1791 LOCK_THREAD (thread);
1793 if ((thread->state & ThreadState_Unstarted) != 0) {
1794 UNLOCK_THREAD (thread);
1796 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1800 UNLOCK_THREAD (thread);
1803 ms=MONO_INFINITE_WAIT;
1805 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1807 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1809 ret=mono_join_uninterrupted (handle, ms, &error);
1811 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1813 mono_error_set_pending_exception (&error);
1815 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1816 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1821 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1826 #define MANAGED_WAIT_FAILED 0x7fffffff
1829 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1831 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1832 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1833 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1834 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1835 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1836 return WAIT_IO_COMPLETION;
1837 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1838 return WAIT_TIMEOUT;
1839 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1840 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1841 return MANAGED_WAIT_FAILED;
1843 g_error ("%s: unknown val value %d", __func__, val);
1847 static MonoW32HandleWaitRet
1848 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1851 MonoW32HandleWaitRet ret;
1856 mono_error_init (error);
1858 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1862 if (numhandles != 1)
1863 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1865 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1867 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1868 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1869 #endif /* HOST_WIN32 */
1872 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1875 exc = mono_thread_execute_interruption ();
1877 mono_error_set_exception_instance (error, exc);
1884 /* Re-calculate ms according to the time passed */
1885 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1886 if (diff_ms >= ms) {
1887 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1890 wait = ms - diff_ms;
1896 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1901 MonoW32HandleWaitRet ret;
1903 MonoObject *waitHandle;
1904 MonoInternalThread *thread = mono_thread_internal_current ();
1906 /* Do this WaitSleepJoin check before creating objects */
1907 if (mono_thread_current_check_pending_interrupt ())
1908 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1910 /* We fail in managed if the array has more than 64 elements */
1911 numhandles = (guint32)mono_array_length(mono_handles);
1912 handles = g_new0(HANDLE, numhandles);
1914 for(i = 0; i < numhandles; i++) {
1915 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1916 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1920 ms=MONO_INFINITE_WAIT;
1923 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1925 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1927 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1931 mono_error_set_pending_exception (&error);
1933 return map_native_wait_result_to_managed (ret, numhandles);
1936 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1939 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1940 uintptr_t numhandles;
1941 MonoW32HandleWaitRet ret;
1943 MonoObject *waitHandle;
1944 MonoInternalThread *thread = mono_thread_internal_current ();
1946 /* Do this WaitSleepJoin check before creating objects */
1947 if (mono_thread_current_check_pending_interrupt ())
1948 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1950 numhandles = mono_array_length(mono_handles);
1951 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1952 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1954 for(i = 0; i < numhandles; i++) {
1955 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1956 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1960 ms=MONO_INFINITE_WAIT;
1963 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1965 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1967 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1969 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1971 mono_error_set_pending_exception (&error);
1973 return map_native_wait_result_to_managed (ret, numhandles);
1976 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1979 MonoW32HandleWaitRet ret;
1980 MonoInternalThread *thread = mono_thread_internal_current ();
1982 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1985 ms=MONO_INFINITE_WAIT;
1988 if (mono_thread_current_check_pending_interrupt ())
1989 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1991 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1993 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1995 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1997 mono_error_set_pending_exception (&error);
1998 return map_native_wait_result_to_managed (ret, 1);
2002 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
2004 MonoW32HandleWaitRet ret;
2005 MonoInternalThread *thread = mono_thread_internal_current ();
2008 ms = MONO_INFINITE_WAIT;
2010 if (mono_thread_current_check_pending_interrupt ())
2011 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2013 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2017 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2019 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2023 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2025 return map_native_wait_result_to_managed (ret, 1);
2028 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2030 return InterlockedIncrement (location);
2033 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2035 #if SIZEOF_VOID_P == 4
2036 if (G_UNLIKELY ((size_t)location & 0x7)) {
2038 mono_interlocked_lock ();
2041 mono_interlocked_unlock ();
2045 return InterlockedIncrement64 (location);
2048 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2050 return InterlockedDecrement(location);
2053 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2055 #if SIZEOF_VOID_P == 4
2056 if (G_UNLIKELY ((size_t)location & 0x7)) {
2058 mono_interlocked_lock ();
2061 mono_interlocked_unlock ();
2065 return InterlockedDecrement64 (location);
2068 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2070 return InterlockedExchange(location, value);
2073 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2076 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2077 mono_gc_wbarrier_generic_nostore (location);
2081 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2083 return InterlockedExchangePointer(location, value);
2086 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2088 IntFloatUnion val, ret;
2091 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2097 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2099 #if SIZEOF_VOID_P == 4
2100 if (G_UNLIKELY ((size_t)location & 0x7)) {
2102 mono_interlocked_lock ();
2105 mono_interlocked_unlock ();
2109 return InterlockedExchange64 (location, value);
2113 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2115 LongDoubleUnion val, ret;
2118 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2123 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2125 return InterlockedCompareExchange(location, value, comparand);
2128 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2130 gint32 r = InterlockedCompareExchange(location, value, comparand);
2131 *success = r == comparand;
2135 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2138 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2139 mono_gc_wbarrier_generic_nostore (location);
2143 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2145 return InterlockedCompareExchangePointer(location, value, comparand);
2148 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2150 IntFloatUnion val, ret, cmp;
2153 cmp.fval = comparand;
2154 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2160 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2162 #if SIZEOF_VOID_P == 8
2163 LongDoubleUnion val, comp, ret;
2166 comp.fval = comparand;
2167 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2173 mono_interlocked_lock ();
2175 if (old == comparand)
2177 mono_interlocked_unlock ();
2184 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2186 #if SIZEOF_VOID_P == 4
2187 if (G_UNLIKELY ((size_t)location & 0x7)) {
2189 mono_interlocked_lock ();
2191 if (old == comparand)
2193 mono_interlocked_unlock ();
2197 return InterlockedCompareExchange64 (location, value, comparand);
2201 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2204 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2205 mono_gc_wbarrier_generic_nostore (location);
2210 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2213 MONO_CHECK_NULL (location, NULL);
2214 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2215 mono_gc_wbarrier_generic_nostore (location);
2220 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2222 return InterlockedAdd (location, value);
2226 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2228 #if SIZEOF_VOID_P == 4
2229 if (G_UNLIKELY ((size_t)location & 0x7)) {
2231 mono_interlocked_lock ();
2234 mono_interlocked_unlock ();
2238 return InterlockedAdd64 (location, value);
2242 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2244 #if SIZEOF_VOID_P == 4
2245 if (G_UNLIKELY ((size_t)location & 0x7)) {
2247 mono_interlocked_lock ();
2249 mono_interlocked_unlock ();
2253 return InterlockedRead64 (location);
2257 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2259 mono_memory_barrier ();
2263 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2265 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2267 if (state & ThreadState_Background) {
2268 /* If the thread changes the background mode, the main thread has to
2269 * be notified, since it has to rebuild the list of threads to
2272 mono_os_event_set (&background_change_event);
2277 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2279 mono_thread_set_state (this_obj, (MonoThreadState)state);
2281 if (state & ThreadState_Background) {
2282 /* If the thread changes the background mode, the main thread has to
2283 * be notified, since it has to rebuild the list of threads to
2286 mono_os_event_set (&background_change_event);
2291 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2295 LOCK_THREAD (this_obj);
2297 state = this_obj->state;
2299 UNLOCK_THREAD (this_obj);
2304 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2306 MonoInternalThread *current;
2308 MonoInternalThread *thread = this_obj->internal_thread;
2310 LOCK_THREAD (thread);
2312 current = mono_thread_internal_current ();
2314 thread->thread_interrupt_requested = TRUE;
2315 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2317 UNLOCK_THREAD (thread);
2320 async_abort_internal (thread, FALSE);
2325 * mono_thread_current_check_pending_interrupt:
2327 * Checks if there's a interruption request and set the pending exception if so.
2329 * @returns true if a pending exception was set
2332 mono_thread_current_check_pending_interrupt (void)
2334 MonoInternalThread *thread = mono_thread_internal_current ();
2335 gboolean throw_ = FALSE;
2337 LOCK_THREAD (thread);
2339 if (thread->thread_interrupt_requested) {
2341 thread->thread_interrupt_requested = FALSE;
2344 UNLOCK_THREAD (thread);
2347 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2352 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2354 LOCK_THREAD (thread);
2356 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2357 (thread->state & ThreadState_StopRequested) != 0 ||
2358 (thread->state & ThreadState_Stopped) != 0)
2360 UNLOCK_THREAD (thread);
2364 if ((thread->state & ThreadState_Unstarted) != 0) {
2365 thread->state |= ThreadState_Aborted;
2366 UNLOCK_THREAD (thread);
2370 thread->state |= ThreadState_AbortRequested;
2371 if (thread->abort_state_handle)
2372 mono_gchandle_free (thread->abort_state_handle);
2374 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2375 g_assert (thread->abort_state_handle);
2377 thread->abort_state_handle = 0;
2379 thread->abort_exc = NULL;
2381 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));
2383 /* During shutdown, we can't wait for other threads */
2385 /* Make sure the thread is awake */
2386 mono_thread_resume (thread);
2388 UNLOCK_THREAD (thread);
2393 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2395 if (!request_thread_abort (thread, state))
2398 if (thread == mono_thread_internal_current ()) {
2400 self_abort_internal (&error);
2401 mono_error_set_pending_exception (&error);
2403 async_abort_internal (thread, TRUE);
2408 * mono_thread_internal_abort:
2410 * Request thread @thread to be aborted.
2412 * @thread MUST NOT be the current thread.
2415 mono_thread_internal_abort (MonoInternalThread *thread)
2417 g_assert (thread != mono_thread_internal_current ());
2419 if (!request_thread_abort (thread, NULL))
2421 async_abort_internal (thread, TRUE);
2425 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2427 MonoInternalThread *thread = mono_thread_internal_current ();
2428 gboolean was_aborting;
2430 LOCK_THREAD (thread);
2431 was_aborting = thread->state & ThreadState_AbortRequested;
2432 thread->state &= ~ThreadState_AbortRequested;
2433 UNLOCK_THREAD (thread);
2435 if (!was_aborting) {
2436 const char *msg = "Unable to reset abort because no abort was requested";
2437 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2441 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2442 thread->abort_exc = NULL;
2443 if (thread->abort_state_handle) {
2444 mono_gchandle_free (thread->abort_state_handle);
2445 /* This is actually not necessary - the handle
2446 only counts if the exception is set */
2447 thread->abort_state_handle = 0;
2452 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2454 LOCK_THREAD (thread);
2456 thread->state &= ~ThreadState_AbortRequested;
2458 if (thread->abort_exc) {
2459 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2460 thread->abort_exc = NULL;
2461 if (thread->abort_state_handle) {
2462 mono_gchandle_free (thread->abort_state_handle);
2463 /* This is actually not necessary - the handle
2464 only counts if the exception is set */
2465 thread->abort_state_handle = 0;
2469 UNLOCK_THREAD (thread);
2473 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2476 MonoInternalThread *thread = this_obj->internal_thread;
2477 MonoObject *state, *deserialized = NULL;
2480 if (!thread->abort_state_handle)
2483 state = mono_gchandle_get_target (thread->abort_state_handle);
2486 domain = mono_domain_get ();
2487 if (mono_object_domain (state) == domain)
2490 deserialized = mono_object_xdomain_representation (state, domain, &error);
2492 if (!deserialized) {
2493 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2494 if (!is_ok (&error)) {
2495 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2496 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2498 mono_set_pending_exception (invalid_op_exc);
2502 return deserialized;
2506 mono_thread_suspend (MonoInternalThread *thread)
2508 LOCK_THREAD (thread);
2510 if ((thread->state & ThreadState_Unstarted) != 0 ||
2511 (thread->state & ThreadState_Aborted) != 0 ||
2512 (thread->state & ThreadState_Stopped) != 0)
2514 UNLOCK_THREAD (thread);
2518 if ((thread->state & ThreadState_Suspended) != 0 ||
2519 (thread->state & ThreadState_SuspendRequested) != 0 ||
2520 (thread->state & ThreadState_StopRequested) != 0)
2522 UNLOCK_THREAD (thread);
2526 thread->state |= ThreadState_SuspendRequested;
2527 mono_os_event_reset (thread->suspended);
2529 if (thread == mono_thread_internal_current ()) {
2530 /* calls UNLOCK_THREAD (thread) */
2531 self_suspend_internal ();
2533 /* calls UNLOCK_THREAD (thread) */
2534 async_suspend_internal (thread, FALSE);
2541 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2543 if (!mono_thread_suspend (this_obj->internal_thread)) {
2544 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2549 /* LOCKING: LOCK_THREAD(thread) must be held */
2551 mono_thread_resume (MonoInternalThread *thread)
2553 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2554 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2555 thread->state &= ~ThreadState_SuspendRequested;
2556 mono_os_event_set (thread->suspended);
2560 if ((thread->state & ThreadState_Suspended) == 0 ||
2561 (thread->state & ThreadState_Unstarted) != 0 ||
2562 (thread->state & ThreadState_Aborted) != 0 ||
2563 (thread->state & ThreadState_Stopped) != 0)
2565 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2569 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2571 mono_os_event_set (thread->suspended);
2573 if (!thread->self_suspended) {
2574 UNLOCK_THREAD (thread);
2576 /* Awake the thread */
2577 if (!mono_thread_info_resume (thread_get_tid (thread)))
2580 LOCK_THREAD (thread);
2583 thread->state &= ~ThreadState_Suspended;
2589 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2591 if (!thread->internal_thread) {
2592 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2594 LOCK_THREAD (thread->internal_thread);
2595 if (!mono_thread_resume (thread->internal_thread))
2596 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2597 UNLOCK_THREAD (thread->internal_thread);
2602 mono_threads_is_critical_method (MonoMethod *method)
2604 switch (method->wrapper_type) {
2605 case MONO_WRAPPER_RUNTIME_INVOKE:
2606 case MONO_WRAPPER_XDOMAIN_INVOKE:
2607 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2614 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2619 if (mono_threads_is_critical_method (m)) {
2620 *((gboolean*)data) = TRUE;
2627 is_running_protected_wrapper (void)
2629 gboolean found = FALSE;
2630 mono_stack_walk (find_wrapper, &found);
2635 request_thread_stop (MonoInternalThread *thread)
2637 LOCK_THREAD (thread);
2639 if ((thread->state & ThreadState_StopRequested) != 0 ||
2640 (thread->state & ThreadState_Stopped) != 0)
2642 UNLOCK_THREAD (thread);
2646 /* Make sure the thread is awake */
2647 mono_thread_resume (thread);
2649 thread->state |= ThreadState_StopRequested;
2650 thread->state &= ~ThreadState_AbortRequested;
2652 UNLOCK_THREAD (thread);
2657 * mono_thread_internal_stop:
2659 * Request thread @thread to stop.
2661 * @thread MUST NOT be the current thread.
2664 mono_thread_internal_stop (MonoInternalThread *thread)
2666 g_assert (thread != mono_thread_internal_current ());
2668 if (!request_thread_stop (thread))
2671 async_abort_internal (thread, TRUE);
2674 void mono_thread_stop (MonoThread *thread)
2676 MonoInternalThread *internal = thread->internal_thread;
2678 if (!request_thread_stop (internal))
2681 if (internal == mono_thread_internal_current ()) {
2683 self_abort_internal (&error);
2685 This function is part of the embeding API and has no way to return the exception
2686 to be thrown. So what we do is keep the old behavior and raise the exception.
2688 mono_error_raise_exception (&error); /* OK to throw, see note */
2690 async_abort_internal (internal, TRUE);
2695 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2697 gint8 tmp = *(volatile gint8 *)ptr;
2698 mono_memory_barrier ();
2703 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2705 gint16 tmp = *(volatile gint16 *)ptr;
2706 mono_memory_barrier ();
2711 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2713 gint32 tmp = *(volatile gint32 *)ptr;
2714 mono_memory_barrier ();
2719 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2721 gint64 tmp = *(volatile gint64 *)ptr;
2722 mono_memory_barrier ();
2727 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2729 volatile void *tmp = *(volatile void **)ptr;
2730 mono_memory_barrier ();
2731 return (void *) tmp;
2735 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2737 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2738 mono_memory_barrier ();
2739 return (MonoObject *) tmp;
2743 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2745 double tmp = *(volatile double *)ptr;
2746 mono_memory_barrier ();
2751 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2753 float tmp = *(volatile float *)ptr;
2754 mono_memory_barrier ();
2759 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2761 return InterlockedRead8 ((volatile gint8 *)ptr);
2765 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2767 return InterlockedRead16 ((volatile gint16 *)ptr);
2771 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2773 return InterlockedRead ((volatile gint32 *)ptr);
2777 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2779 #if SIZEOF_VOID_P == 4
2780 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2782 mono_interlocked_lock ();
2783 val = *(gint64*)ptr;
2784 mono_interlocked_unlock ();
2788 return InterlockedRead64 ((volatile gint64 *)ptr);
2792 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2794 return InterlockedReadPointer ((volatile gpointer *)ptr);
2798 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2802 #if SIZEOF_VOID_P == 4
2803 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2805 mono_interlocked_lock ();
2806 val = *(double*)ptr;
2807 mono_interlocked_unlock ();
2812 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2818 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2822 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2828 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2830 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2834 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2836 mono_memory_barrier ();
2837 *(volatile gint8 *)ptr = value;
2841 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2843 mono_memory_barrier ();
2844 *(volatile gint16 *)ptr = value;
2848 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2850 mono_memory_barrier ();
2851 *(volatile gint32 *)ptr = value;
2855 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2857 mono_memory_barrier ();
2858 *(volatile gint64 *)ptr = value;
2862 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2864 mono_memory_barrier ();
2865 *(volatile void **)ptr = value;
2869 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2871 mono_memory_barrier ();
2872 mono_gc_wbarrier_generic_store (ptr, value);
2876 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2878 mono_memory_barrier ();
2879 *(volatile double *)ptr = value;
2883 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2885 mono_memory_barrier ();
2886 *(volatile float *)ptr = value;
2890 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2892 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2896 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2898 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2902 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2904 InterlockedWrite ((volatile gint32 *)ptr, value);
2908 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2910 #if SIZEOF_VOID_P == 4
2911 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2912 mono_interlocked_lock ();
2913 *(gint64*)ptr = value;
2914 mono_interlocked_unlock ();
2919 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2923 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2925 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2929 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2933 #if SIZEOF_VOID_P == 4
2934 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2935 mono_interlocked_lock ();
2936 *(double*)ptr = value;
2937 mono_interlocked_unlock ();
2944 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2948 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2954 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2958 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2960 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2964 free_context (void *user_data)
2966 ContextStaticData *data = user_data;
2968 mono_threads_lock ();
2971 * There is no guarantee that, by the point this reference queue callback
2972 * has been invoked, the GC handle associated with the object will fail to
2973 * resolve as one might expect. So if we don't free and remove the GC
2974 * handle here, free_context_static_data_helper () could end up resolving
2975 * a GC handle to an actually-dead context which would contain a pointer
2976 * to an already-freed static data segment, resulting in a crash when
2979 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2981 mono_threads_unlock ();
2983 mono_gchandle_free (data->gc_handle);
2984 mono_free_static_data (data->static_data);
2989 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2991 mono_threads_lock ();
2993 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2996 contexts = g_hash_table_new (NULL, NULL);
2999 context_queue = mono_gc_reference_queue_new (free_context);
3001 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
3002 g_hash_table_insert (contexts, gch, gch);
3005 * We use this intermediate structure to contain a duplicate pointer to
3006 * the static data because we can't rely on being able to resolve the GC
3007 * handle in the reference queue callback.
3009 ContextStaticData *data = g_new0 (ContextStaticData, 1);
3010 data->gc_handle = GPOINTER_TO_UINT (gch);
3013 context_adjust_static_data (ctx);
3014 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
3016 mono_threads_unlock ();
3018 mono_profiler_context_loaded (ctx);
3022 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
3025 * NOTE: Since finalizers are unreliable for the purposes of ensuring
3026 * cleanup in exceptional circumstances, we don't actually do any
3027 * cleanup work here. We instead do this via a reference queue.
3030 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
3032 mono_profiler_context_unloaded (ctx);
3035 void mono_thread_init (MonoThreadStartCB start_cb,
3036 MonoThreadAttachCB attach_cb)
3038 mono_coop_mutex_init_recursive (&threads_mutex);
3040 mono_os_mutex_init_recursive(&interlocked_mutex);
3041 mono_os_mutex_init_recursive(&joinable_threads_mutex);
3043 mono_os_event_init (&background_change_event, FALSE);
3045 mono_init_static_data_info (&thread_static_info);
3046 mono_init_static_data_info (&context_static_info);
3048 mono_thread_start_cb = start_cb;
3049 mono_thread_attach_cb = attach_cb;
3052 void mono_thread_cleanup (void)
3054 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3055 /* The main thread must abandon any held mutexes (particularly
3056 * important for named mutexes as they are shared across
3057 * processes, see bug 74680.) This will happen when the
3058 * thread exits, but if it's not running in a subthread it
3059 * won't exit in time.
3061 mono_w32mutex_abandon ();
3065 /* This stuff needs more testing, it seems one of these
3066 * critical sections can be locked when mono_thread_cleanup is
3069 mono_coop_mutex_destroy (&threads_mutex);
3070 mono_os_mutex_destroy (&interlocked_mutex);
3071 mono_os_mutex_destroy (&delayed_free_table_mutex);
3072 mono_os_mutex_destroy (&small_id_mutex);
3073 mono_os_event_destroy (&background_change_event);
3078 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3080 mono_thread_cleanup_fn = func;
3084 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3086 thread->internal_thread->manage_callback = func;
3090 static void print_tids (gpointer key, gpointer value, gpointer user)
3092 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3093 * sizeof(uint) and a cast to uint would overflow
3095 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3096 * print this as a pointer.
3098 g_message ("Waiting for: %p", key);
3103 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3104 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3109 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3112 MonoThreadInfoWaitRet ret;
3114 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3116 /* Add the thread state change event, so it wakes
3117 * up if a thread changes to background mode. */
3120 if (check_state_change)
3121 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3123 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3126 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3127 /* See the comment in build_wait_tids() */
3128 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3132 for( i = 0; i < wait->num; i++)
3133 mono_threads_close_thread_handle (wait->handles [i]);
3135 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3138 if (ret < wait->num) {
3139 MonoInternalThread *internal;
3141 internal = wait->threads [ret];
3143 mono_threads_lock ();
3144 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3145 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3146 mono_threads_unlock ();
3150 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3152 struct wait_data *wait=(struct wait_data *)user;
3154 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3155 MonoInternalThread *thread=(MonoInternalThread *)value;
3157 /* Ignore background threads, we abort them later */
3158 /* Do not lock here since it is not needed and the caller holds threads_lock */
3159 if (thread->state & ThreadState_Background) {
3160 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3161 return; /* just leave, ignore */
3164 if (mono_gc_is_finalizer_internal_thread (thread)) {
3165 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3169 if (thread == mono_thread_internal_current ()) {
3170 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3174 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3175 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3179 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3180 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3184 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3185 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3186 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3187 wait->threads[wait->num]=thread;
3190 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3192 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3197 /* Just ignore the rest, we can't do anything with
3204 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3206 struct wait_data *wait=(struct wait_data *)user;
3207 MonoNativeThreadId self = mono_native_thread_id_get ();
3208 MonoInternalThread *thread = (MonoInternalThread *)value;
3210 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3213 /* The finalizer thread is not a background thread */
3214 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3215 && (thread->state & ThreadState_Background) != 0
3216 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3218 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3219 wait->threads[wait->num] = thread;
3222 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3223 mono_thread_internal_abort (thread);
3227 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3228 && !mono_gc_is_finalizer_internal_thread (thread);
3232 * mono_threads_set_shutting_down:
3234 * Is called by a thread that wants to shut down Mono. If the runtime is already
3235 * shutting down, the calling thread is suspended/stopped, and this function never
3239 mono_threads_set_shutting_down (void)
3241 MonoInternalThread *current_thread = mono_thread_internal_current ();
3243 mono_threads_lock ();
3245 if (shutting_down) {
3246 mono_threads_unlock ();
3248 /* Make sure we're properly suspended/stopped */
3250 LOCK_THREAD (current_thread);
3252 if ((current_thread->state & ThreadState_SuspendRequested) ||
3253 (current_thread->state & ThreadState_AbortRequested) ||
3254 (current_thread->state & ThreadState_StopRequested)) {
3255 UNLOCK_THREAD (current_thread);
3256 mono_thread_execute_interruption ();
3258 current_thread->state |= ThreadState_Stopped;
3259 UNLOCK_THREAD (current_thread);
3262 /*since we're killing the thread, detach it.*/
3263 mono_thread_detach_internal (current_thread);
3265 /* Wake up other threads potentially waiting for us */
3266 mono_thread_info_exit (0);
3268 shutting_down = TRUE;
3270 /* Not really a background state change, but this will
3271 * interrupt the main thread if it is waiting for all
3272 * the other threads.
3274 mono_os_event_set (&background_change_event);
3276 mono_threads_unlock ();
3280 void mono_thread_manage (void)
3282 struct wait_data wait_data;
3283 struct wait_data *wait = &wait_data;
3285 memset (wait, 0, sizeof (struct wait_data));
3286 /* join each thread that's still running */
3287 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3289 mono_threads_lock ();
3291 THREAD_DEBUG (g_message("%s: No threads", __func__));
3292 mono_threads_unlock ();
3295 mono_threads_unlock ();
3298 mono_threads_lock ();
3299 if (shutting_down) {
3300 /* somebody else is shutting down */
3301 mono_threads_unlock ();
3304 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3305 mono_g_hash_table_foreach (threads, print_tids, NULL));
3307 mono_os_event_reset (&background_change_event);
3309 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3310 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3311 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3312 mono_threads_unlock ();
3314 /* Something to wait for */
3315 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3316 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3317 } while(wait->num>0);
3319 /* Mono is shutting down, so just wait for the end */
3320 if (!mono_runtime_try_shutdown ()) {
3321 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3322 mono_thread_suspend (mono_thread_internal_current ());
3323 mono_thread_execute_interruption ();
3327 * Remove everything but the finalizer thread and self.
3328 * Also abort all the background threads
3331 mono_threads_lock ();
3334 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3335 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3336 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3338 mono_threads_unlock ();
3340 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3341 if (wait->num > 0) {
3342 /* Something to wait for */
3343 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3345 } while (wait->num > 0);
3348 * give the subthreads a chance to really quit (this is mainly needed
3349 * to get correct user and system times from getrusage/wait/time(1)).
3350 * This could be removed if we avoid pthread_detach() and use pthread_join().
3352 mono_thread_info_yield ();
3356 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3358 MonoInternalThread *thread = (MonoInternalThread*)value;
3359 struct wait_data *wait = (struct wait_data*)user_data;
3362 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3364 * This needs no locking.
3366 if ((thread->state & ThreadState_Suspended) != 0 ||
3367 (thread->state & ThreadState_Stopped) != 0)
3370 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3371 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3372 wait->threads [wait->num] = thread;
3378 * mono_thread_suspend_all_other_threads:
3380 * Suspend all managed threads except the finalizer thread and this thread. It is
3381 * not possible to resume them later.
3383 void mono_thread_suspend_all_other_threads (void)
3385 struct wait_data wait_data;
3386 struct wait_data *wait = &wait_data;
3388 MonoNativeThreadId self = mono_native_thread_id_get ();
3389 guint32 eventidx = 0;
3390 gboolean starting, finished;
3392 memset (wait, 0, sizeof (struct wait_data));
3394 * The other threads could be in an arbitrary state at this point, i.e.
3395 * they could be starting up, shutting down etc. This means that there could be
3396 * threads which are not even in the threads hash table yet.
3400 * First we set a barrier which will be checked by all threads before they
3401 * are added to the threads hash table, and they will exit if the flag is set.
3402 * This ensures that no threads could be added to the hash later.
3403 * We will use shutting_down as the barrier for now.
3405 g_assert (shutting_down);
3408 * We make multiple calls to WaitForMultipleObjects since:
3409 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3410 * - some threads could exit without becoming suspended
3415 * Make a copy of the hashtable since we can't do anything with
3416 * threads while threads_mutex is held.
3419 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3420 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3421 mono_threads_lock ();
3422 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3423 mono_threads_unlock ();
3426 /* Get the suspended events that we'll be waiting for */
3427 for (i = 0; i < wait->num; ++i) {
3428 MonoInternalThread *thread = wait->threads [i];
3430 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3431 || mono_gc_is_finalizer_internal_thread (thread)
3432 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3434 mono_threads_close_thread_handle (wait->handles [i]);
3435 wait->threads [i] = NULL;
3439 LOCK_THREAD (thread);
3441 if ((thread->state & ThreadState_Suspended) != 0 ||
3442 (thread->state & ThreadState_StopRequested) != 0 ||
3443 (thread->state & ThreadState_Stopped) != 0) {
3444 UNLOCK_THREAD (thread);
3445 mono_threads_close_thread_handle (wait->handles [i]);
3446 wait->threads [i] = NULL;
3452 /* Convert abort requests into suspend requests */
3453 if ((thread->state & ThreadState_AbortRequested) != 0)
3454 thread->state &= ~ThreadState_AbortRequested;
3456 thread->state |= ThreadState_SuspendRequested;
3457 mono_os_event_reset (thread->suspended);
3459 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3460 async_suspend_internal (thread, TRUE);
3462 mono_threads_close_thread_handle (wait->handles [i]);
3463 wait->threads [i] = NULL;
3465 if (eventidx <= 0) {
3467 * If there are threads which are starting up, we wait until they
3468 * are suspended when they try to register in the threads hash.
3469 * This is guaranteed to finish, since the threads which can create new
3470 * threads get suspended after a while.
3471 * FIXME: The finalizer thread can still create new threads.
3473 mono_threads_lock ();
3474 if (threads_starting_up)
3475 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3478 mono_threads_unlock ();
3480 mono_thread_info_sleep (100, NULL);
3488 MonoInternalThread *thread;
3489 MonoStackFrameInfo *frames;
3490 int nframes, max_frames;
3491 int nthreads, max_threads;
3492 MonoInternalThread **threads;
3493 } ThreadDumpUserData;
3495 static gboolean thread_dump_requested;
3497 /* This needs to be async safe */
3499 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3501 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3503 if (ud->nframes < ud->max_frames) {
3504 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3511 /* This needs to be async safe */
3512 static SuspendThreadResult
3513 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3515 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3516 MonoInternalThread *thread = user_data->thread;
3519 /* This no longer works with remote unwinding */
3520 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3521 mono_thread_internal_describe (thread, text);
3522 g_string_append (text, "\n");
3525 if (thread == mono_thread_internal_current ())
3526 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3528 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3530 return MonoResumeThread;
3534 int nthreads, max_threads;
3535 MonoInternalThread **threads;
3536 } CollectThreadsUserData;
3539 collect_thread (gpointer key, gpointer value, gpointer user)
3541 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3542 MonoInternalThread *thread = (MonoInternalThread *)value;
3544 if (ud->nthreads < ud->max_threads)
3545 ud->threads [ud->nthreads ++] = thread;
3549 * Collect running threads into the THREADS array.
3550 * THREADS should be an array allocated on the stack.
3553 collect_threads (MonoInternalThread **thread_array, int max_threads)
3555 CollectThreadsUserData ud;
3557 memset (&ud, 0, sizeof (ud));
3558 /* This array contains refs, but its on the stack, so its ok */
3559 ud.threads = thread_array;
3560 ud.max_threads = max_threads;
3562 mono_threads_lock ();
3563 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3564 mono_threads_unlock ();
3570 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3572 GString* text = g_string_new (0);
3574 GError *error = NULL;
3577 ud->thread = thread;
3580 /* Collect frames for the thread */
3581 if (thread == mono_thread_internal_current ()) {
3582 get_thread_dump (mono_thread_info_current (), ud);
3584 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3588 * Do all the non async-safe work outside of get_thread_dump.
3591 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3593 g_string_append_printf (text, "\n\"%s\"", name);
3596 else if (thread->threadpool_thread) {
3597 g_string_append (text, "\n\"<threadpool thread>\"");
3599 g_string_append (text, "\n\"<unnamed thread>\"");
3602 for (i = 0; i < ud->nframes; ++i) {
3603 MonoStackFrameInfo *frame = &ud->frames [i];
3604 MonoMethod *method = NULL;
3606 if (frame->type == FRAME_TYPE_MANAGED)
3607 method = mono_jit_info_get_method (frame->ji);
3610 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3611 g_string_append_printf (text, " %s\n", location);
3614 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3618 fprintf (stdout, "%s", text->str);
3620 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3621 OutputDebugStringA(text->str);
3624 g_string_free (text, TRUE);
3629 mono_threads_perform_thread_dump (void)
3631 ThreadDumpUserData ud;
3632 MonoInternalThread *thread_array [128];
3633 int tindex, nthreads;
3635 if (!thread_dump_requested)
3638 printf ("Full thread dump:\n");
3640 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3641 nthreads = collect_threads (thread_array, 128);
3643 memset (&ud, 0, sizeof (ud));
3644 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3645 ud.max_frames = 256;
3647 for (tindex = 0; tindex < nthreads; ++tindex)
3648 dump_thread (thread_array [tindex], &ud);
3652 thread_dump_requested = FALSE;
3655 /* Obtain the thread dump of all threads */
3657 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3660 ThreadDumpUserData ud;
3661 MonoInternalThread *thread_array [128];
3662 MonoDomain *domain = mono_domain_get ();
3663 MonoDebugSourceLocation *location;
3664 int tindex, nthreads;
3666 mono_error_init (error);
3668 *out_threads = NULL;
3669 *out_stack_frames = NULL;
3671 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3672 nthreads = collect_threads (thread_array, 128);
3674 memset (&ud, 0, sizeof (ud));
3675 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3676 ud.max_frames = 256;
3678 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3681 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3685 for (tindex = 0; tindex < nthreads; ++tindex) {
3686 MonoInternalThread *thread = thread_array [tindex];
3687 MonoArray *thread_frames;
3693 /* Collect frames for the thread */
3694 if (thread == mono_thread_internal_current ()) {
3695 get_thread_dump (mono_thread_info_current (), &ud);
3697 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3700 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3702 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3705 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3707 for (i = 0; i < ud.nframes; ++i) {
3708 MonoStackFrameInfo *frame = &ud.frames [i];
3709 MonoMethod *method = NULL;
3710 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3714 sf->native_offset = frame->native_offset;
3716 if (frame->type == FRAME_TYPE_MANAGED)
3717 method = mono_jit_info_get_method (frame->ji);
3720 sf->method_address = (gsize) frame->ji->code_start;
3722 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3725 MONO_OBJECT_SETREF (sf, method, rm);
3727 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3729 sf->il_offset = location->il_offset;
3731 if (location && location->source_file) {
3732 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3733 sf->line = location->row;
3734 sf->column = location->column;
3736 mono_debug_free_source_location (location);
3741 mono_array_setref (thread_frames, i, sf);
3747 return is_ok (error);
3751 * mono_threads_request_thread_dump:
3753 * Ask all threads except the current to print their stacktrace to stdout.
3756 mono_threads_request_thread_dump (void)
3758 /*The new thread dump code runs out of the finalizer thread. */
3759 thread_dump_requested = TRUE;
3760 mono_gc_finalize_notify ();
3765 gint allocated; /* +1 so that refs [allocated] == NULL */
3769 typedef struct ref_stack RefStack;
3772 ref_stack_new (gint initial_size)
3776 initial_size = MAX (initial_size, 16) + 1;
3777 rs = g_new0 (RefStack, 1);
3778 rs->refs = g_new0 (gpointer, initial_size);
3779 rs->allocated = initial_size;
3784 ref_stack_destroy (gpointer ptr)
3786 RefStack *rs = (RefStack *)ptr;
3795 ref_stack_push (RefStack *rs, gpointer ptr)
3797 g_assert (rs != NULL);
3799 if (rs->bottom >= rs->allocated) {
3800 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3801 rs->allocated <<= 1;
3802 rs->refs [rs->allocated] = NULL;
3804 rs->refs [rs->bottom++] = ptr;
3808 ref_stack_pop (RefStack *rs)
3810 if (rs == NULL || rs->bottom == 0)
3814 rs->refs [rs->bottom] = NULL;
3818 ref_stack_find (RefStack *rs, gpointer ptr)
3825 for (refs = rs->refs; refs && *refs; refs++) {
3833 * mono_thread_push_appdomain_ref:
3835 * Register that the current thread may have references to objects in domain
3836 * @domain on its stack. Each call to this function should be paired with a
3837 * call to pop_appdomain_ref.
3840 mono_thread_push_appdomain_ref (MonoDomain *domain)
3842 MonoInternalThread *thread = mono_thread_internal_current ();
3845 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3846 SPIN_LOCK (thread->lock_thread_id);
3847 if (thread->appdomain_refs == NULL)
3848 thread->appdomain_refs = ref_stack_new (16);
3849 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3850 SPIN_UNLOCK (thread->lock_thread_id);
3855 mono_thread_pop_appdomain_ref (void)
3857 MonoInternalThread *thread = mono_thread_internal_current ();
3860 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3861 SPIN_LOCK (thread->lock_thread_id);
3862 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3863 SPIN_UNLOCK (thread->lock_thread_id);
3868 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3871 SPIN_LOCK (thread->lock_thread_id);
3872 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3873 SPIN_UNLOCK (thread->lock_thread_id);
3878 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3880 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3883 typedef struct abort_appdomain_data {
3884 struct wait_data wait;
3886 } abort_appdomain_data;
3889 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3891 MonoInternalThread *thread = (MonoInternalThread*)value;
3892 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3893 MonoDomain *domain = data->domain;
3895 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3896 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3898 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3899 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3900 data->wait.threads [data->wait.num] = thread;
3903 /* Just ignore the rest, we can't do anything with
3911 * mono_threads_abort_appdomain_threads:
3913 * Abort threads which has references to the given appdomain.
3916 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3918 #ifdef __native_client__
3922 abort_appdomain_data user_data;
3924 int orig_timeout = timeout;
3927 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3929 start_time = mono_msec_ticks ();
3931 mono_threads_lock ();
3933 user_data.domain = domain;
3934 user_data.wait.num = 0;
3935 /* This shouldn't take any locks */
3936 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3937 mono_threads_unlock ();
3939 if (user_data.wait.num > 0) {
3940 /* Abort the threads outside the threads lock */
3941 for (i = 0; i < user_data.wait.num; ++i)
3942 mono_thread_internal_abort (user_data.wait.threads [i]);
3945 * We should wait for the threads either to abort, or to leave the
3946 * domain. We can't do the latter, so we wait with a timeout.
3948 wait_for_tids (&user_data.wait, 100, FALSE);
3951 /* Update remaining time */
3952 timeout -= mono_msec_ticks () - start_time;
3953 start_time = mono_msec_ticks ();
3955 if (orig_timeout != -1 && timeout < 0)
3958 while (user_data.wait.num > 0);
3960 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3966 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3968 MonoInternalThread *thread = (MonoInternalThread*)value;
3969 MonoDomain *domain = (MonoDomain*)user_data;
3972 /* No locking needed here */
3973 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3975 if (thread->cached_culture_info) {
3976 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3977 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3978 if (obj && obj->vtable->domain == domain)
3979 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3985 * mono_threads_clear_cached_culture:
3987 * Clear the cached_current_culture from all threads if it is in the
3991 mono_threads_clear_cached_culture (MonoDomain *domain)
3993 mono_threads_lock ();
3994 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3995 mono_threads_unlock ();
3999 * mono_thread_get_undeniable_exception:
4001 * Return an exception which needs to be raised when leaving a catch clause.
4002 * This is used for undeniable exception propagation.
4005 mono_thread_get_undeniable_exception (void)
4007 MonoInternalThread *thread = mono_thread_internal_current ();
4009 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
4012 // We don't want to have our exception effect calls made by
4013 // the catching block
4015 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
4019 * FIXME: Clear the abort exception and return an AppDomainUnloaded
4020 * exception if the thread no longer references a dying appdomain.
4022 thread->abort_exc->trace_ips = NULL;
4023 thread->abort_exc->stack_trace = NULL;
4024 return thread->abort_exc;
4027 #if MONO_SMALL_CONFIG
4028 #define NUM_STATIC_DATA_IDX 4
4029 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4033 #define NUM_STATIC_DATA_IDX 8
4034 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4035 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
4039 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4040 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4043 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4045 gpointer *static_data = (gpointer *)addr;
4047 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4048 void **ptr = (void **)static_data [i];
4053 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4054 void **p = ptr + idx;
4057 mark_func ((MonoObject**)p, gc_data);
4063 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4065 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4069 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4071 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4075 * mono_alloc_static_data
4077 * Allocate memory blocks for storing threads or context static data
4080 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4082 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4085 gpointer* static_data = *static_data_ptr;
4087 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4088 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4090 if (mono_gc_user_markers_supported ()) {
4091 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4092 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4094 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4095 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4098 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4099 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4100 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4101 *static_data_ptr = static_data;
4102 static_data [0] = static_data;
4105 for (i = 1; i <= idx; ++i) {
4106 if (static_data [i])
4109 if (mono_gc_user_markers_supported ())
4110 static_data [i] = g_malloc0 (static_data_size [i]);
4112 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4113 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4114 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4119 mono_free_static_data (gpointer* static_data)
4122 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4123 gpointer p = static_data [i];
4127 * At this point, the static data pointer array is still registered with the
4128 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4129 * data. Freeing the individual arrays without first nulling their slots
4130 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4131 * such an already freed array. See bug #13813.
4133 static_data [i] = NULL;
4134 mono_memory_write_barrier ();
4135 if (mono_gc_user_markers_supported ())
4138 mono_gc_free_fixed (p);
4140 mono_gc_free_fixed (static_data);
4144 * mono_init_static_data_info
4146 * Initializes static data counters
4148 static void mono_init_static_data_info (StaticDataInfo *static_data)
4150 static_data->idx = 0;
4151 static_data->offset = 0;
4152 static_data->freelist = NULL;
4156 * mono_alloc_static_data_slot
4158 * Generates an offset for static data. static_data contains the counters
4159 * used to generate it.
4162 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4164 if (!static_data->idx && !static_data->offset) {
4166 * we use the first chunk of the first allocation also as
4167 * an array for the rest of the data
4169 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4171 static_data->offset += align - 1;
4172 static_data->offset &= ~(align - 1);
4173 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4174 static_data->idx ++;
4175 g_assert (size <= static_data_size [static_data->idx]);
4176 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4177 static_data->offset = 0;
4179 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4180 static_data->offset += size;
4185 * LOCKING: requires that threads_mutex is held
4188 context_adjust_static_data (MonoAppContext *ctx)
4190 if (context_static_info.offset || context_static_info.idx > 0) {
4191 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4192 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4193 ctx->data->static_data = ctx->static_data;
4198 * LOCKING: requires that threads_mutex is held
4201 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4203 MonoInternalThread *thread = (MonoInternalThread *)value;
4204 guint32 offset = GPOINTER_TO_UINT (user);
4206 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4210 * LOCKING: requires that threads_mutex is held
4213 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4215 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4220 guint32 offset = GPOINTER_TO_UINT (user);
4221 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4222 ctx->data->static_data = ctx->static_data;
4225 static StaticDataFreeList*
4226 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4228 StaticDataFreeList* prev = NULL;
4229 StaticDataFreeList* tmp = static_data->freelist;
4231 if (tmp->size == size) {
4233 prev->next = tmp->next;
4235 static_data->freelist = tmp->next;
4244 #if SIZEOF_VOID_P == 4
4251 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4253 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4255 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4256 MonoBitSet *rb = sets [idx];
4257 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4258 offset /= sizeof (uintptr_t);
4259 /* offset is now the bitmap offset */
4260 for (int i = 0; i < numbits; ++i) {
4261 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4262 mono_bitset_set_fast (rb, offset + i);
4267 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4269 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4270 MonoBitSet *rb = sets [idx];
4271 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4272 offset /= sizeof (uintptr_t);
4273 /* offset is now the bitmap offset */
4274 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4275 mono_bitset_clear_fast (rb, offset + i);
4279 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4281 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4283 StaticDataInfo *info;
4286 if (static_type == SPECIAL_STATIC_THREAD) {
4287 info = &thread_static_info;
4288 sets = thread_reference_bitmaps;
4290 info = &context_static_info;
4291 sets = context_reference_bitmaps;
4294 mono_threads_lock ();
4296 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4300 offset = item->offset;
4303 offset = mono_alloc_static_data_slot (info, size, align);
4306 update_reference_bitmap (sets, offset, bitmap, numbits);
4308 if (static_type == SPECIAL_STATIC_THREAD) {
4309 /* This can be called during startup */
4310 if (threads != NULL)
4311 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4313 if (contexts != NULL)
4314 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4316 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4319 mono_threads_unlock ();
4325 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4327 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4329 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4330 return get_thread_static_data (thread, offset);
4332 return get_context_static_data (thread->current_appcontext, offset);
4337 mono_get_special_static_data (guint32 offset)
4339 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4348 * LOCKING: requires that threads_mutex is held
4351 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4353 MonoInternalThread *thread = (MonoInternalThread *)value;
4354 OffsetSize *data = (OffsetSize *)user;
4355 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4356 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4359 if (!thread->static_data || !thread->static_data [idx])
4361 ptr = ((char*) thread->static_data [idx]) + off;
4362 mono_gc_bzero_atomic (ptr, data->size);
4366 * LOCKING: requires that threads_mutex is held
4369 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4371 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4376 OffsetSize *data = (OffsetSize *)user;
4377 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4378 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4381 if (!ctx->static_data || !ctx->static_data [idx])
4384 ptr = ((char*) ctx->static_data [idx]) + off;
4385 mono_gc_bzero_atomic (ptr, data->size);
4389 do_free_special_slot (guint32 offset, guint32 size)
4391 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4393 StaticDataInfo *info;
4395 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4396 info = &thread_static_info;
4397 sets = thread_reference_bitmaps;
4399 info = &context_static_info;
4400 sets = context_reference_bitmaps;
4403 guint32 data_offset = offset;
4404 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4405 OffsetSize data = { data_offset, size };
4407 clear_reference_bitmap (sets, data.offset, data.size);
4409 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4410 if (threads != NULL)
4411 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4413 if (contexts != NULL)
4414 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4417 if (!mono_runtime_is_shutting_down ()) {
4418 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4420 item->offset = offset;
4423 item->next = info->freelist;
4424 info->freelist = item;
4429 do_free_special (gpointer key, gpointer value, gpointer data)
4431 MonoClassField *field = (MonoClassField *)key;
4432 guint32 offset = GPOINTER_TO_UINT (value);
4435 size = mono_type_size (field->type, &align);
4436 do_free_special_slot (offset, size);
4440 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4442 mono_threads_lock ();
4444 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4446 mono_threads_unlock ();
4450 static void CALLBACK dummy_apc (ULONG_PTR param)
4456 * mono_thread_execute_interruption
4458 * Performs the operation that the requested thread state requires (abort,
4461 static MonoException*
4462 mono_thread_execute_interruption (void)
4464 MonoInternalThread *thread = mono_thread_internal_current ();
4465 MonoThread *sys_thread = mono_thread_current ();
4467 LOCK_THREAD (thread);
4469 /* MonoThread::interruption_requested can only be changed with atomics */
4470 if (mono_thread_clear_interruption_requested (thread)) {
4471 /* this will consume pending APC calls */
4473 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4475 InterlockedDecrement (&thread_interruption_requested);
4477 /* Clear the interrupted flag of the thread so it can wait again */
4478 mono_thread_info_clear_self_interrupt ();
4481 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4482 if (sys_thread->pending_exception) {
4485 exc = sys_thread->pending_exception;
4486 sys_thread->pending_exception = NULL;
4488 UNLOCK_THREAD (thread);
4490 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4491 UNLOCK_THREAD (thread);
4492 g_assert (sys_thread->pending_exception == NULL);
4493 if (thread->abort_exc == NULL) {
4495 * This might be racy, but it has to be called outside the lock
4496 * since it calls managed code.
4498 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4500 return thread->abort_exc;
4502 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4503 /* calls UNLOCK_THREAD (thread) */
4504 self_suspend_internal ();
4507 else if ((thread->state & ThreadState_StopRequested) != 0) {
4508 /* FIXME: do this through the JIT? */
4510 UNLOCK_THREAD (thread);
4512 mono_thread_exit ();
4514 } else if (thread->thread_interrupt_requested) {
4516 thread->thread_interrupt_requested = FALSE;
4517 UNLOCK_THREAD (thread);
4519 return(mono_get_exception_thread_interrupted ());
4522 UNLOCK_THREAD (thread);
4528 * mono_thread_request_interruption
4530 * A signal handler can call this method to request the interruption of a
4531 * thread. The result of the interruption will depend on the current state of
4532 * the thread. If the result is an exception that needs to be throw, it is
4533 * provided as return value.
4536 mono_thread_request_interruption (gboolean running_managed)
4538 MonoInternalThread *thread = mono_thread_internal_current ();
4540 /* The thread may already be stopping */
4545 if (thread->interrupt_on_stop &&
4546 thread->state & ThreadState_StopRequested &&
4547 thread->state & ThreadState_Background)
4550 if (!mono_thread_set_interruption_requested (thread))
4552 InterlockedIncrement (&thread_interruption_requested);
4554 if (!running_managed || is_running_protected_wrapper ()) {
4555 /* Can't stop while in unmanaged code. Increase the global interruption
4556 request count. When exiting the unmanaged method the count will be
4557 checked and the thread will be interrupted. */
4559 /* this will awake the thread if it is in WaitForSingleObject
4561 /* Our implementation of this function ignores the func argument */
4563 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4565 mono_thread_info_self_interrupt ();
4570 return mono_thread_execute_interruption ();
4574 /*This function should be called by a thread after it has exited all of
4575 * its handle blocks at interruption time.*/
4577 mono_thread_resume_interruption (void)
4579 MonoInternalThread *thread = mono_thread_internal_current ();
4580 gboolean still_aborting;
4582 /* The thread may already be stopping */
4586 LOCK_THREAD (thread);
4587 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4588 UNLOCK_THREAD (thread);
4590 /*This can happen if the protected block called Thread::ResetAbort*/
4591 if (!still_aborting)
4594 if (!mono_thread_set_interruption_requested (thread))
4596 InterlockedIncrement (&thread_interruption_requested);
4598 mono_thread_info_self_interrupt ();
4600 return mono_thread_execute_interruption ();
4603 gboolean mono_thread_interruption_requested ()
4605 if (thread_interruption_requested) {
4606 MonoInternalThread *thread = mono_thread_internal_current ();
4607 /* The thread may already be stopping */
4609 return mono_thread_get_interruption_requested (thread);
4614 static MonoException*
4615 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4617 MonoInternalThread *thread = mono_thread_internal_current ();
4619 /* The thread may already be stopping */
4622 if (!mono_thread_get_interruption_requested (thread))
4624 if (!bypass_abort_protection && is_running_protected_wrapper ())
4627 return mono_thread_execute_interruption ();
4631 * Performs the interruption of the current thread, if one has been requested,
4632 * and the thread is not running a protected wrapper.
4633 * Return the exception which needs to be thrown, if any.
4636 mono_thread_interruption_checkpoint (void)
4638 return mono_thread_interruption_checkpoint_request (FALSE);
4642 * Performs the interruption of the current thread, if one has been requested.
4643 * Return the exception which needs to be thrown, if any.
4646 mono_thread_force_interruption_checkpoint_noraise (void)
4648 return mono_thread_interruption_checkpoint_request (TRUE);
4652 * mono_set_pending_exception:
4654 * Set the pending exception of the current thread to EXC.
4655 * The exception will be thrown when execution returns to managed code.
4658 mono_set_pending_exception (MonoException *exc)
4660 MonoThread *thread = mono_thread_current ();
4662 /* The thread may already be stopping */
4666 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4668 mono_thread_request_interruption (FALSE);
4672 * mono_thread_interruption_request_flag:
4674 * Returns the address of a flag that will be non-zero if an interruption has
4675 * been requested for a thread. The thread to interrupt may not be the current
4676 * thread, so an additional call to mono_thread_interruption_requested() or
4677 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4680 gint32* mono_thread_interruption_request_flag ()
4682 return &thread_interruption_requested;
4686 mono_thread_init_apartment_state (void)
4689 MonoInternalThread* thread = mono_thread_internal_current ();
4691 /* Positive return value indicates success, either
4692 * S_OK if this is first CoInitialize call, or
4693 * S_FALSE if CoInitialize already called, but with same
4694 * threading model. A negative value indicates failure,
4695 * probably due to trying to change the threading model.
4697 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4698 ? COINIT_APARTMENTTHREADED
4699 : COINIT_MULTITHREADED) < 0) {
4700 thread->apartment_state = ThreadApartmentState_Unknown;
4706 mono_thread_cleanup_apartment_state (void)
4709 MonoInternalThread* thread = mono_thread_internal_current ();
4711 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4718 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4720 LOCK_THREAD (thread);
4721 thread->state |= state;
4722 UNLOCK_THREAD (thread);
4726 * mono_thread_test_and_set_state:
4728 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4730 * Returns TRUE is @set was OR'd in.
4733 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4735 LOCK_THREAD (thread);
4737 if ((thread->state & test) != 0) {
4738 UNLOCK_THREAD (thread);
4742 thread->state |= set;
4743 UNLOCK_THREAD (thread);
4749 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4751 LOCK_THREAD (thread);
4752 thread->state &= ~state;
4753 UNLOCK_THREAD (thread);
4757 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4759 gboolean ret = FALSE;
4761 LOCK_THREAD (thread);
4763 if ((thread->state & test) != 0) {
4767 UNLOCK_THREAD (thread);
4773 self_interrupt_thread (void *_unused)
4776 MonoThreadInfo *info;
4778 exc = mono_thread_execute_interruption ();
4780 if (mono_threads_is_coop_enabled ()) {
4781 /* We can return from an async call in coop, as
4782 * it's simply called when exiting the safepoint */
4786 g_error ("%s: we can't resume from an async call", __func__);
4789 info = mono_thread_info_current ();
4791 /* We must use _with_context since we didn't trampoline into the runtime */
4792 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. */
4796 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4800 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4804 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4806 MonoJitInfo **dest = (MonoJitInfo **)data;
4812 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4814 MonoJitInfo *ji = NULL;
4819 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4820 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4821 * where we hold runtime locks.
4823 if (!mono_threads_is_coop_enabled ())
4824 mono_thread_info_set_is_async_context (TRUE);
4825 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4826 if (!mono_threads_is_coop_enabled ())
4827 mono_thread_info_set_is_async_context (FALSE);
4832 MonoInternalThread *thread;
4833 gboolean install_async_abort;
4834 MonoThreadInfoInterruptToken *interrupt_token;
4837 static SuspendThreadResult
4838 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4840 AbortThreadData *data = (AbortThreadData *)ud;
4841 MonoInternalThread *thread = data->thread;
4842 MonoJitInfo *ji = NULL;
4843 gboolean protected_wrapper;
4844 gboolean running_managed;
4846 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4847 return MonoResumeThread;
4850 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4851 The protected block code will give them a chance when appropriate.
4853 if (mono_thread_get_abort_prot_block_count (thread) > 0)
4854 return MonoResumeThread;
4856 /*someone is already interrupting it*/
4857 if (!mono_thread_set_interruption_requested (thread))
4858 return MonoResumeThread;
4860 InterlockedIncrement (&thread_interruption_requested);
4862 ji = mono_thread_info_get_last_managed (info);
4863 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4864 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4866 if (!protected_wrapper && running_managed) {
4867 /*We are in managed code*/
4868 /*Set the thread to call */
4869 if (data->install_async_abort)
4870 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4871 return MonoResumeThread;
4874 * This will cause waits to be broken.
4875 * It will also prevent the thread from entering a wait, so if the thread returns
4876 * from the wait before it receives the abort signal, it will just spin in the wait
4877 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4880 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4882 return MonoResumeThread;
4887 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4889 AbortThreadData data;
4891 g_assert (thread != mono_thread_internal_current ());
4893 data.thread = thread;
4894 data.install_async_abort = install_async_abort;
4895 data.interrupt_token = NULL;
4897 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4898 if (data.interrupt_token)
4899 mono_thread_info_finish_interrupt (data.interrupt_token);
4900 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4904 self_abort_internal (MonoError *error)
4908 mono_error_init (error);
4910 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4911 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4914 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.
4916 exc = mono_thread_request_interruption (TRUE);
4918 mono_error_set_exception_instance (error, exc);
4920 mono_thread_info_self_interrupt ();
4924 MonoInternalThread *thread;
4926 MonoThreadInfoInterruptToken *interrupt_token;
4927 } SuspendThreadData;
4929 static SuspendThreadResult
4930 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4932 SuspendThreadData *data = (SuspendThreadData *)ud;
4933 MonoInternalThread *thread = data->thread;
4934 MonoJitInfo *ji = NULL;
4935 gboolean protected_wrapper;
4936 gboolean running_managed;
4938 ji = mono_thread_info_get_last_managed (info);
4939 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4940 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4942 if (running_managed && !protected_wrapper) {
4943 if (mono_threads_is_coop_enabled ()) {
4944 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4945 return MonoResumeThread;
4947 thread->state &= ~ThreadState_SuspendRequested;
4948 thread->state |= ThreadState_Suspended;
4949 return KeepSuspended;
4952 if (mono_thread_set_interruption_requested (thread))
4953 InterlockedIncrement (&thread_interruption_requested);
4954 if (data->interrupt)
4955 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4957 return MonoResumeThread;
4961 /* LOCKING: called with @thread synch_cs held, and releases it */
4963 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4965 SuspendThreadData data;
4967 g_assert (thread != mono_thread_internal_current ());
4969 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4971 thread->self_suspended = FALSE;
4973 data.thread = thread;
4974 data.interrupt = interrupt;
4975 data.interrupt_token = NULL;
4977 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4978 if (data.interrupt_token)
4979 mono_thread_info_finish_interrupt (data.interrupt_token);
4981 UNLOCK_THREAD (thread);
4984 /* LOCKING: called with @thread synch_cs held, and releases it */
4986 self_suspend_internal (void)
4988 MonoInternalThread *thread;
4990 MonoOSEventWaitRet res;
4992 thread = mono_thread_internal_current ();
4994 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4996 thread->self_suspended = TRUE;
4998 thread->state &= ~ThreadState_SuspendRequested;
4999 thread->state |= ThreadState_Suspended;
5001 UNLOCK_THREAD (thread);
5003 event = thread->suspended;
5006 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT);
5007 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
5012 * mono_thread_is_foreign:
5013 * @thread: the thread to query
5015 * This function allows one to determine if a thread was created by the mono runtime and has
5016 * a well defined lifecycle or it's a foreigh one, created by the native environment.
5018 * Returns: TRUE if @thread was not created by the runtime.
5021 mono_thread_is_foreign (MonoThread *thread)
5023 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
5024 return info->runtime_thread == FALSE;
5028 * mono_add_joinable_thread:
5030 * Add TID to the list of joinable threads.
5031 * LOCKING: Acquires the threads lock.
5034 mono_threads_add_joinable_thread (gpointer tid)
5038 * We cannot detach from threads because it causes problems like
5039 * 2fd16f60/r114307. So we collect them and join them when
5040 * we have time (in he finalizer thread).
5042 joinable_threads_lock ();
5043 if (!joinable_threads)
5044 joinable_threads = g_hash_table_new (NULL, NULL);
5045 g_hash_table_insert (joinable_threads, tid, tid);
5046 joinable_thread_count ++;
5047 joinable_threads_unlock ();
5049 mono_gc_finalize_notify ();
5054 * mono_threads_join_threads:
5056 * Join all joinable threads. This is called from the finalizer thread.
5057 * LOCKING: Acquires the threads lock.
5060 mono_threads_join_threads (void)
5063 GHashTableIter iter;
5070 if (!joinable_thread_count)
5074 joinable_threads_lock ();
5076 if (g_hash_table_size (joinable_threads)) {
5077 g_hash_table_iter_init (&iter, joinable_threads);
5078 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5079 thread = (pthread_t)tid;
5080 g_hash_table_remove (joinable_threads, key);
5081 joinable_thread_count --;
5084 joinable_threads_unlock ();
5086 if (thread != pthread_self ()) {
5088 /* This shouldn't block */
5089 mono_threads_join_lock ();
5090 mono_native_thread_join (thread);
5091 mono_threads_join_unlock ();
5104 * Wait for thread TID to exit.
5105 * LOCKING: Acquires the threads lock.
5108 mono_thread_join (gpointer tid)
5112 gboolean found = FALSE;
5114 joinable_threads_lock ();
5115 if (!joinable_threads)
5116 joinable_threads = g_hash_table_new (NULL, NULL);
5117 if (g_hash_table_lookup (joinable_threads, tid)) {
5118 g_hash_table_remove (joinable_threads, tid);
5119 joinable_thread_count --;
5122 joinable_threads_unlock ();
5125 thread = (pthread_t)tid;
5127 mono_native_thread_join (thread);
5133 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5135 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5136 mono_thread_interruption_checkpoint ();
5140 mono_thread_internal_unhandled_exception (MonoObject* exc)
5142 MonoClass *klass = exc->vtable->klass;
5143 if (is_threadabort_exception (klass)) {
5144 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5145 } else if (!is_appdomainunloaded_exception (klass)
5146 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5147 mono_unhandled_exception (exc);
5148 if (mono_environment_exitcode_get () == 1) {
5149 mono_environment_exitcode_set (255);
5150 mono_invoke_unhandled_exception_hook (exc);
5151 g_assert_not_reached ();
5157 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5160 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5161 mono_error_set_pending_exception (&error);
5165 * mono_threads_attach_coop: called by native->managed wrappers
5169 * - @return: the original domain which needs to be restored, or NULL.
5172 * - @dummy: contains the original domain
5173 * - @return: a cookie containing current MonoThreadInfo*.
5176 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5179 gboolean fresh_thread = FALSE;
5182 /* Happens when called from AOTed code which is only used in the root domain. */
5183 domain = mono_get_root_domain ();
5188 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5189 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5190 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5191 * we're only responsible for making the cookie. */
5192 if (mono_threads_is_coop_enabled ()) {
5193 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5194 fresh_thread = !info || !mono_thread_info_is_live (info);
5197 if (!mono_thread_internal_current ()) {
5198 mono_thread_attach_full (domain, FALSE);
5201 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5204 orig = mono_domain_get ();
5206 mono_domain_set (domain, TRUE);
5208 if (!mono_threads_is_coop_enabled ())
5209 return orig != domain ? orig : NULL;
5213 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5214 * return the right cookie. */
5215 return mono_threads_enter_gc_unsafe_region_cookie ();
5218 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5219 return mono_threads_enter_gc_unsafe_region (dummy);
5224 * mono_threads_detach_coop: called by native->managed wrappers
5227 * - @cookie: the original domain which needs to be restored, or NULL.
5231 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5232 * - @dummy: contains the original domain
5235 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5237 MonoDomain *domain, *orig;
5239 if (!mono_threads_is_coop_enabled ()) {
5240 orig = (MonoDomain*) cookie;
5242 mono_domain_set (orig, TRUE);
5244 orig = (MonoDomain*) *dummy;
5246 domain = mono_domain_get ();
5249 /* it won't do anything if cookie is NULL
5250 * thread state RUNNING -> (RUNNING|BLOCKING) */
5251 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5253 if (orig != domain) {
5255 mono_domain_unset ();
5257 mono_domain_set (orig, TRUE);
5263 mono_thread_try_resume_interruption (void)
5265 MonoInternalThread *thread;
5267 thread = mono_thread_internal_current ();
5268 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
5270 if (mono_thread_get_abort_prot_block_count (thread) > 0 || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5273 return mono_thread_resume_interruption ();
5277 /* Returns TRUE if the current thread is ready to be interrupted. */
5279 mono_threads_is_ready_to_be_interrupted (void)
5281 MonoInternalThread *thread;
5283 thread = mono_thread_internal_current ();
5284 LOCK_THREAD (thread);
5285 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5286 UNLOCK_THREAD (thread);
5290 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5291 UNLOCK_THREAD (thread);
5295 UNLOCK_THREAD (thread);
5301 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5303 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5305 if (internal->thread_info) {
5306 g_string_append (text, ", state : ");
5307 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5310 if (internal->owned_mutexes) {
5313 g_string_append (text, ", owns : [");
5314 for (i = 0; i < internal->owned_mutexes->len; i++)
5315 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5316 g_string_append (text, "]");
5321 mono_thread_internal_is_current (MonoInternalThread *internal)
5323 g_assert (internal);
5324 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));