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, MonoError *error)
1574 LOCK_THREAD (this_obj);
1576 mono_error_init (error);
1578 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1579 UNLOCK_THREAD (this_obj);
1581 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1584 if (this_obj->name) {
1585 g_free (this_obj->name);
1586 this_obj->name_len = 0;
1589 this_obj->name = g_new (gunichar2, mono_string_length (name));
1590 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1591 this_obj->name_len = mono_string_length (name);
1594 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1597 this_obj->name = NULL;
1600 UNLOCK_THREAD (this_obj);
1602 if (this_obj->name && this_obj->tid) {
1603 char *tname = mono_string_to_utf8_checked (name, error);
1604 return_if_nok (error);
1605 mono_profiler_thread_name (this_obj->tid, tname);
1606 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1612 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1615 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1616 mono_error_set_pending_exception (&error);
1620 * ves_icall_System_Threading_Thread_GetPriority_internal:
1621 * @param this_obj: The MonoInternalThread on which to operate.
1623 * Gets the priority of the given thread.
1624 * @return: The priority of the given thread.
1627 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1630 MonoInternalThread *internal = this_obj->internal_thread;
1632 LOCK_THREAD (internal);
1633 priority = internal->priority;
1634 UNLOCK_THREAD (internal);
1640 * ves_icall_System_Threading_Thread_SetPriority_internal:
1641 * @param this_obj: The MonoInternalThread on which to operate.
1642 * @param priority: The priority to set.
1644 * Sets the priority of the given thread.
1647 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1649 MonoInternalThread *internal = this_obj->internal_thread;
1651 LOCK_THREAD (internal);
1652 internal->priority = priority;
1653 if (internal->thread_info != NULL)
1654 mono_thread_internal_set_priority (internal, priority);
1655 UNLOCK_THREAD (internal);
1658 /* If the array is already in the requested domain, we just return it,
1659 otherwise we return a copy in that domain. */
1661 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1665 mono_error_init (error);
1669 if (mono_object_domain (arr) == domain)
1672 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1673 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1678 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1681 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1682 mono_error_set_pending_exception (&error);
1687 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1690 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1691 mono_error_set_pending_exception (&error);
1696 mono_thread_current (void)
1698 MonoDomain *domain = mono_domain_get ();
1699 MonoInternalThread *internal = mono_thread_internal_current ();
1700 MonoThread **current_thread_ptr;
1702 g_assert (internal);
1703 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1705 if (!*current_thread_ptr) {
1706 g_assert (domain != mono_get_root_domain ());
1707 *current_thread_ptr = create_thread_object (domain, internal);
1709 return *current_thread_ptr;
1712 /* Return the thread object belonging to INTERNAL in the current domain */
1714 mono_thread_current_for_thread (MonoInternalThread *internal)
1716 MonoDomain *domain = mono_domain_get ();
1717 MonoThread **current_thread_ptr;
1719 g_assert (internal);
1720 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1722 if (!*current_thread_ptr) {
1723 g_assert (domain != mono_get_root_domain ());
1724 *current_thread_ptr = create_thread_object (domain, internal);
1726 return *current_thread_ptr;
1730 mono_thread_internal_current (void)
1732 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1733 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1737 static MonoThreadInfoWaitRet
1738 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1741 MonoThreadInfoWaitRet ret;
1746 mono_error_init (error);
1748 start = (ms == -1) ? 0 : mono_msec_ticks ();
1751 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1754 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1757 exc = mono_thread_execute_interruption ();
1759 mono_error_set_exception_instance (error, exc);
1766 /* Re-calculate ms according to the time passed */
1767 diff_ms = (gint32)(mono_msec_ticks () - start);
1768 if (diff_ms >= ms) {
1769 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1772 wait = ms - diff_ms;
1779 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1781 MonoInternalThread *thread = this_obj->internal_thread;
1782 MonoThreadHandle *handle = thread->handle;
1783 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1787 if (mono_thread_current_check_pending_interrupt ())
1790 LOCK_THREAD (thread);
1792 if ((thread->state & ThreadState_Unstarted) != 0) {
1793 UNLOCK_THREAD (thread);
1795 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1799 UNLOCK_THREAD (thread);
1802 ms=MONO_INFINITE_WAIT;
1804 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1806 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1808 ret=mono_join_uninterrupted (handle, ms, &error);
1810 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1812 mono_error_set_pending_exception (&error);
1814 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1815 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1820 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1825 #define MANAGED_WAIT_FAILED 0x7fffffff
1828 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1830 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1831 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1832 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1833 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1834 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1835 return WAIT_IO_COMPLETION;
1836 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1837 return WAIT_TIMEOUT;
1838 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1839 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1840 return MANAGED_WAIT_FAILED;
1842 g_error ("%s: unknown val value %d", __func__, val);
1846 static MonoW32HandleWaitRet
1847 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1850 MonoW32HandleWaitRet ret;
1855 mono_error_init (error);
1857 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1861 if (numhandles != 1)
1862 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1864 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1866 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1867 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1868 #endif /* HOST_WIN32 */
1871 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1874 exc = mono_thread_execute_interruption ();
1876 mono_error_set_exception_instance (error, exc);
1883 /* Re-calculate ms according to the time passed */
1884 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1885 if (diff_ms >= ms) {
1886 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1889 wait = ms - diff_ms;
1895 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1900 MonoW32HandleWaitRet ret;
1902 MonoObject *waitHandle;
1903 MonoInternalThread *thread = mono_thread_internal_current ();
1905 /* Do this WaitSleepJoin check before creating objects */
1906 if (mono_thread_current_check_pending_interrupt ())
1907 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1909 /* We fail in managed if the array has more than 64 elements */
1910 numhandles = (guint32)mono_array_length(mono_handles);
1911 handles = g_new0(HANDLE, numhandles);
1913 for(i = 0; i < numhandles; i++) {
1914 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1915 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1919 ms=MONO_INFINITE_WAIT;
1922 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1924 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1926 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1930 mono_error_set_pending_exception (&error);
1932 return map_native_wait_result_to_managed (ret, numhandles);
1935 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1938 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1939 uintptr_t numhandles;
1940 MonoW32HandleWaitRet ret;
1942 MonoObject *waitHandle;
1943 MonoInternalThread *thread = mono_thread_internal_current ();
1945 /* Do this WaitSleepJoin check before creating objects */
1946 if (mono_thread_current_check_pending_interrupt ())
1947 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1949 numhandles = mono_array_length(mono_handles);
1950 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1951 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1953 for(i = 0; i < numhandles; i++) {
1954 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1955 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1959 ms=MONO_INFINITE_WAIT;
1962 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1964 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1966 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1968 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1970 mono_error_set_pending_exception (&error);
1972 return map_native_wait_result_to_managed (ret, numhandles);
1975 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1978 MonoW32HandleWaitRet ret;
1979 MonoInternalThread *thread = mono_thread_internal_current ();
1981 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1984 ms=MONO_INFINITE_WAIT;
1987 if (mono_thread_current_check_pending_interrupt ())
1988 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1990 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1992 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1994 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1996 mono_error_set_pending_exception (&error);
1997 return map_native_wait_result_to_managed (ret, 1);
2001 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
2003 MonoW32HandleWaitRet ret;
2004 MonoInternalThread *thread = mono_thread_internal_current ();
2007 ms = MONO_INFINITE_WAIT;
2009 if (mono_thread_current_check_pending_interrupt ())
2010 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2012 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2016 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2018 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2022 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2024 return map_native_wait_result_to_managed (ret, 1);
2027 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2029 return InterlockedIncrement (location);
2032 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2034 #if SIZEOF_VOID_P == 4
2035 if (G_UNLIKELY ((size_t)location & 0x7)) {
2037 mono_interlocked_lock ();
2040 mono_interlocked_unlock ();
2044 return InterlockedIncrement64 (location);
2047 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2049 return InterlockedDecrement(location);
2052 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2054 #if SIZEOF_VOID_P == 4
2055 if (G_UNLIKELY ((size_t)location & 0x7)) {
2057 mono_interlocked_lock ();
2060 mono_interlocked_unlock ();
2064 return InterlockedDecrement64 (location);
2067 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2069 return InterlockedExchange(location, value);
2072 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2075 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2076 mono_gc_wbarrier_generic_nostore (location);
2080 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2082 return InterlockedExchangePointer(location, value);
2085 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2087 IntFloatUnion val, ret;
2090 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2096 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2098 #if SIZEOF_VOID_P == 4
2099 if (G_UNLIKELY ((size_t)location & 0x7)) {
2101 mono_interlocked_lock ();
2104 mono_interlocked_unlock ();
2108 return InterlockedExchange64 (location, value);
2112 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2114 LongDoubleUnion val, ret;
2117 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2122 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2124 return InterlockedCompareExchange(location, value, comparand);
2127 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2129 gint32 r = InterlockedCompareExchange(location, value, comparand);
2130 *success = r == comparand;
2134 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2137 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2138 mono_gc_wbarrier_generic_nostore (location);
2142 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2144 return InterlockedCompareExchangePointer(location, value, comparand);
2147 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2149 IntFloatUnion val, ret, cmp;
2152 cmp.fval = comparand;
2153 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2159 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2161 #if SIZEOF_VOID_P == 8
2162 LongDoubleUnion val, comp, ret;
2165 comp.fval = comparand;
2166 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2172 mono_interlocked_lock ();
2174 if (old == comparand)
2176 mono_interlocked_unlock ();
2183 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2185 #if SIZEOF_VOID_P == 4
2186 if (G_UNLIKELY ((size_t)location & 0x7)) {
2188 mono_interlocked_lock ();
2190 if (old == comparand)
2192 mono_interlocked_unlock ();
2196 return InterlockedCompareExchange64 (location, value, comparand);
2200 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2203 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2204 mono_gc_wbarrier_generic_nostore (location);
2209 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2212 MONO_CHECK_NULL (location, NULL);
2213 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2214 mono_gc_wbarrier_generic_nostore (location);
2219 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2221 return InterlockedAdd (location, value);
2225 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2227 #if SIZEOF_VOID_P == 4
2228 if (G_UNLIKELY ((size_t)location & 0x7)) {
2230 mono_interlocked_lock ();
2233 mono_interlocked_unlock ();
2237 return InterlockedAdd64 (location, value);
2241 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2243 #if SIZEOF_VOID_P == 4
2244 if (G_UNLIKELY ((size_t)location & 0x7)) {
2246 mono_interlocked_lock ();
2248 mono_interlocked_unlock ();
2252 return InterlockedRead64 (location);
2256 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2258 mono_memory_barrier ();
2262 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2264 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2266 if (state & ThreadState_Background) {
2267 /* If the thread changes the background mode, the main thread has to
2268 * be notified, since it has to rebuild the list of threads to
2271 mono_os_event_set (&background_change_event);
2276 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2278 mono_thread_set_state (this_obj, (MonoThreadState)state);
2280 if (state & ThreadState_Background) {
2281 /* If the thread changes the background mode, the main thread has to
2282 * be notified, since it has to rebuild the list of threads to
2285 mono_os_event_set (&background_change_event);
2290 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2294 LOCK_THREAD (this_obj);
2296 state = this_obj->state;
2298 UNLOCK_THREAD (this_obj);
2303 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2305 MonoInternalThread *current;
2307 MonoInternalThread *thread = this_obj->internal_thread;
2309 LOCK_THREAD (thread);
2311 current = mono_thread_internal_current ();
2313 thread->thread_interrupt_requested = TRUE;
2314 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2316 UNLOCK_THREAD (thread);
2319 async_abort_internal (thread, FALSE);
2324 * mono_thread_current_check_pending_interrupt:
2326 * Checks if there's a interruption request and set the pending exception if so.
2328 * @returns true if a pending exception was set
2331 mono_thread_current_check_pending_interrupt (void)
2333 MonoInternalThread *thread = mono_thread_internal_current ();
2334 gboolean throw_ = FALSE;
2336 LOCK_THREAD (thread);
2338 if (thread->thread_interrupt_requested) {
2340 thread->thread_interrupt_requested = FALSE;
2343 UNLOCK_THREAD (thread);
2346 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2351 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2353 LOCK_THREAD (thread);
2355 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2356 (thread->state & ThreadState_StopRequested) != 0 ||
2357 (thread->state & ThreadState_Stopped) != 0)
2359 UNLOCK_THREAD (thread);
2363 if ((thread->state & ThreadState_Unstarted) != 0) {
2364 thread->state |= ThreadState_Aborted;
2365 UNLOCK_THREAD (thread);
2369 thread->state |= ThreadState_AbortRequested;
2370 if (thread->abort_state_handle)
2371 mono_gchandle_free (thread->abort_state_handle);
2373 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2374 g_assert (thread->abort_state_handle);
2376 thread->abort_state_handle = 0;
2378 thread->abort_exc = NULL;
2380 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), thread, (gsize)thread->tid));
2382 /* During shutdown, we can't wait for other threads */
2384 /* Make sure the thread is awake */
2385 mono_thread_resume (thread);
2387 UNLOCK_THREAD (thread);
2392 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2394 if (!request_thread_abort (thread, state))
2397 if (thread == mono_thread_internal_current ()) {
2399 self_abort_internal (&error);
2400 mono_error_set_pending_exception (&error);
2402 async_abort_internal (thread, TRUE);
2407 * mono_thread_internal_abort:
2409 * Request thread @thread to be aborted.
2411 * @thread MUST NOT be the current thread.
2414 mono_thread_internal_abort (MonoInternalThread *thread)
2416 g_assert (thread != mono_thread_internal_current ());
2418 if (!request_thread_abort (thread, NULL))
2420 async_abort_internal (thread, TRUE);
2424 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2426 MonoInternalThread *thread = mono_thread_internal_current ();
2427 gboolean was_aborting;
2429 LOCK_THREAD (thread);
2430 was_aborting = thread->state & ThreadState_AbortRequested;
2431 thread->state &= ~ThreadState_AbortRequested;
2432 UNLOCK_THREAD (thread);
2434 if (!was_aborting) {
2435 const char *msg = "Unable to reset abort because no abort was requested";
2436 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2440 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2441 thread->abort_exc = NULL;
2442 if (thread->abort_state_handle) {
2443 mono_gchandle_free (thread->abort_state_handle);
2444 /* This is actually not necessary - the handle
2445 only counts if the exception is set */
2446 thread->abort_state_handle = 0;
2451 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2453 LOCK_THREAD (thread);
2455 thread->state &= ~ThreadState_AbortRequested;
2457 if (thread->abort_exc) {
2458 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2459 thread->abort_exc = NULL;
2460 if (thread->abort_state_handle) {
2461 mono_gchandle_free (thread->abort_state_handle);
2462 /* This is actually not necessary - the handle
2463 only counts if the exception is set */
2464 thread->abort_state_handle = 0;
2468 UNLOCK_THREAD (thread);
2472 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2475 MonoInternalThread *thread = this_obj->internal_thread;
2476 MonoObject *state, *deserialized = NULL;
2479 if (!thread->abort_state_handle)
2482 state = mono_gchandle_get_target (thread->abort_state_handle);
2485 domain = mono_domain_get ();
2486 if (mono_object_domain (state) == domain)
2489 deserialized = mono_object_xdomain_representation (state, domain, &error);
2491 if (!deserialized) {
2492 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2493 if (!is_ok (&error)) {
2494 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2495 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2497 mono_set_pending_exception (invalid_op_exc);
2501 return deserialized;
2505 mono_thread_suspend (MonoInternalThread *thread)
2507 LOCK_THREAD (thread);
2509 if ((thread->state & ThreadState_Unstarted) != 0 ||
2510 (thread->state & ThreadState_Aborted) != 0 ||
2511 (thread->state & ThreadState_Stopped) != 0)
2513 UNLOCK_THREAD (thread);
2517 if ((thread->state & ThreadState_Suspended) != 0 ||
2518 (thread->state & ThreadState_SuspendRequested) != 0 ||
2519 (thread->state & ThreadState_StopRequested) != 0)
2521 UNLOCK_THREAD (thread);
2525 thread->state |= ThreadState_SuspendRequested;
2526 mono_os_event_reset (thread->suspended);
2528 if (thread == mono_thread_internal_current ()) {
2529 /* calls UNLOCK_THREAD (thread) */
2530 self_suspend_internal ();
2532 /* calls UNLOCK_THREAD (thread) */
2533 async_suspend_internal (thread, FALSE);
2540 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2542 if (!mono_thread_suspend (this_obj->internal_thread)) {
2543 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2548 /* LOCKING: LOCK_THREAD(thread) must be held */
2550 mono_thread_resume (MonoInternalThread *thread)
2552 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2553 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2554 thread->state &= ~ThreadState_SuspendRequested;
2555 mono_os_event_set (thread->suspended);
2559 if ((thread->state & ThreadState_Suspended) == 0 ||
2560 (thread->state & ThreadState_Unstarted) != 0 ||
2561 (thread->state & ThreadState_Aborted) != 0 ||
2562 (thread->state & ThreadState_Stopped) != 0)
2564 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2568 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2570 mono_os_event_set (thread->suspended);
2572 if (!thread->self_suspended) {
2573 UNLOCK_THREAD (thread);
2575 /* Awake the thread */
2576 if (!mono_thread_info_resume (thread_get_tid (thread)))
2579 LOCK_THREAD (thread);
2582 thread->state &= ~ThreadState_Suspended;
2588 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2590 if (!thread->internal_thread) {
2591 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2593 LOCK_THREAD (thread->internal_thread);
2594 if (!mono_thread_resume (thread->internal_thread))
2595 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2596 UNLOCK_THREAD (thread->internal_thread);
2601 mono_threads_is_critical_method (MonoMethod *method)
2603 switch (method->wrapper_type) {
2604 case MONO_WRAPPER_RUNTIME_INVOKE:
2605 case MONO_WRAPPER_XDOMAIN_INVOKE:
2606 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2613 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2618 if (mono_threads_is_critical_method (m)) {
2619 *((gboolean*)data) = TRUE;
2626 is_running_protected_wrapper (void)
2628 gboolean found = FALSE;
2629 mono_stack_walk (find_wrapper, &found);
2634 request_thread_stop (MonoInternalThread *thread)
2636 LOCK_THREAD (thread);
2638 if ((thread->state & ThreadState_StopRequested) != 0 ||
2639 (thread->state & ThreadState_Stopped) != 0)
2641 UNLOCK_THREAD (thread);
2645 /* Make sure the thread is awake */
2646 mono_thread_resume (thread);
2648 thread->state |= ThreadState_StopRequested;
2649 thread->state &= ~ThreadState_AbortRequested;
2651 UNLOCK_THREAD (thread);
2656 * mono_thread_internal_stop:
2658 * Request thread @thread to stop.
2660 * @thread MUST NOT be the current thread.
2663 mono_thread_internal_stop (MonoInternalThread *thread)
2665 g_assert (thread != mono_thread_internal_current ());
2667 if (!request_thread_stop (thread))
2670 async_abort_internal (thread, TRUE);
2673 void mono_thread_stop (MonoThread *thread)
2675 MonoInternalThread *internal = thread->internal_thread;
2677 if (!request_thread_stop (internal))
2680 if (internal == mono_thread_internal_current ()) {
2682 self_abort_internal (&error);
2684 This function is part of the embeding API and has no way to return the exception
2685 to be thrown. So what we do is keep the old behavior and raise the exception.
2687 mono_error_raise_exception (&error); /* OK to throw, see note */
2689 async_abort_internal (internal, TRUE);
2694 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2696 gint8 tmp = *(volatile gint8 *)ptr;
2697 mono_memory_barrier ();
2702 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2704 gint16 tmp = *(volatile gint16 *)ptr;
2705 mono_memory_barrier ();
2710 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2712 gint32 tmp = *(volatile gint32 *)ptr;
2713 mono_memory_barrier ();
2718 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2720 gint64 tmp = *(volatile gint64 *)ptr;
2721 mono_memory_barrier ();
2726 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2728 volatile void *tmp = *(volatile void **)ptr;
2729 mono_memory_barrier ();
2730 return (void *) tmp;
2734 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2736 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2737 mono_memory_barrier ();
2738 return (MonoObject *) tmp;
2742 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2744 double tmp = *(volatile double *)ptr;
2745 mono_memory_barrier ();
2750 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2752 float tmp = *(volatile float *)ptr;
2753 mono_memory_barrier ();
2758 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2760 return InterlockedRead8 ((volatile gint8 *)ptr);
2764 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2766 return InterlockedRead16 ((volatile gint16 *)ptr);
2770 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2772 return InterlockedRead ((volatile gint32 *)ptr);
2776 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2778 #if SIZEOF_VOID_P == 4
2779 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2781 mono_interlocked_lock ();
2782 val = *(gint64*)ptr;
2783 mono_interlocked_unlock ();
2787 return InterlockedRead64 ((volatile gint64 *)ptr);
2791 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2793 return InterlockedReadPointer ((volatile gpointer *)ptr);
2797 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2801 #if SIZEOF_VOID_P == 4
2802 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2804 mono_interlocked_lock ();
2805 val = *(double*)ptr;
2806 mono_interlocked_unlock ();
2811 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2817 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2821 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2827 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2829 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2833 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2835 mono_memory_barrier ();
2836 *(volatile gint8 *)ptr = value;
2840 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2842 mono_memory_barrier ();
2843 *(volatile gint16 *)ptr = value;
2847 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2849 mono_memory_barrier ();
2850 *(volatile gint32 *)ptr = value;
2854 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2856 mono_memory_barrier ();
2857 *(volatile gint64 *)ptr = value;
2861 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2863 mono_memory_barrier ();
2864 *(volatile void **)ptr = value;
2868 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2870 mono_memory_barrier ();
2871 mono_gc_wbarrier_generic_store (ptr, value);
2875 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2877 mono_memory_barrier ();
2878 *(volatile double *)ptr = value;
2882 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2884 mono_memory_barrier ();
2885 *(volatile float *)ptr = value;
2889 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2891 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2895 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2897 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2901 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2903 InterlockedWrite ((volatile gint32 *)ptr, value);
2907 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2909 #if SIZEOF_VOID_P == 4
2910 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2911 mono_interlocked_lock ();
2912 *(gint64*)ptr = value;
2913 mono_interlocked_unlock ();
2918 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2922 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2924 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2928 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2932 #if SIZEOF_VOID_P == 4
2933 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2934 mono_interlocked_lock ();
2935 *(double*)ptr = value;
2936 mono_interlocked_unlock ();
2943 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2947 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2953 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2957 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2959 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2963 free_context (void *user_data)
2965 ContextStaticData *data = user_data;
2967 mono_threads_lock ();
2970 * There is no guarantee that, by the point this reference queue callback
2971 * has been invoked, the GC handle associated with the object will fail to
2972 * resolve as one might expect. So if we don't free and remove the GC
2973 * handle here, free_context_static_data_helper () could end up resolving
2974 * a GC handle to an actually-dead context which would contain a pointer
2975 * to an already-freed static data segment, resulting in a crash when
2978 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2980 mono_threads_unlock ();
2982 mono_gchandle_free (data->gc_handle);
2983 mono_free_static_data (data->static_data);
2988 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2990 mono_threads_lock ();
2992 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2995 contexts = g_hash_table_new (NULL, NULL);
2998 context_queue = mono_gc_reference_queue_new (free_context);
3000 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
3001 g_hash_table_insert (contexts, gch, gch);
3004 * We use this intermediate structure to contain a duplicate pointer to
3005 * the static data because we can't rely on being able to resolve the GC
3006 * handle in the reference queue callback.
3008 ContextStaticData *data = g_new0 (ContextStaticData, 1);
3009 data->gc_handle = GPOINTER_TO_UINT (gch);
3012 context_adjust_static_data (ctx);
3013 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
3015 mono_threads_unlock ();
3017 mono_profiler_context_loaded (ctx);
3021 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
3024 * NOTE: Since finalizers are unreliable for the purposes of ensuring
3025 * cleanup in exceptional circumstances, we don't actually do any
3026 * cleanup work here. We instead do this via a reference queue.
3029 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
3031 mono_profiler_context_unloaded (ctx);
3034 void mono_thread_init (MonoThreadStartCB start_cb,
3035 MonoThreadAttachCB attach_cb)
3037 mono_coop_mutex_init_recursive (&threads_mutex);
3039 mono_os_mutex_init_recursive(&interlocked_mutex);
3040 mono_os_mutex_init_recursive(&joinable_threads_mutex);
3042 mono_os_event_init (&background_change_event, FALSE);
3044 mono_init_static_data_info (&thread_static_info);
3045 mono_init_static_data_info (&context_static_info);
3047 mono_thread_start_cb = start_cb;
3048 mono_thread_attach_cb = attach_cb;
3051 void mono_thread_cleanup (void)
3053 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3054 /* The main thread must abandon any held mutexes (particularly
3055 * important for named mutexes as they are shared across
3056 * processes, see bug 74680.) This will happen when the
3057 * thread exits, but if it's not running in a subthread it
3058 * won't exit in time.
3060 mono_w32mutex_abandon ();
3064 /* This stuff needs more testing, it seems one of these
3065 * critical sections can be locked when mono_thread_cleanup is
3068 mono_coop_mutex_destroy (&threads_mutex);
3069 mono_os_mutex_destroy (&interlocked_mutex);
3070 mono_os_mutex_destroy (&delayed_free_table_mutex);
3071 mono_os_mutex_destroy (&small_id_mutex);
3072 mono_os_event_destroy (&background_change_event);
3077 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3079 mono_thread_cleanup_fn = func;
3083 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3085 thread->internal_thread->manage_callback = func;
3089 static void print_tids (gpointer key, gpointer value, gpointer user)
3091 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3092 * sizeof(uint) and a cast to uint would overflow
3094 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3095 * print this as a pointer.
3097 g_message ("Waiting for: %p", key);
3102 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3103 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3108 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3111 MonoThreadInfoWaitRet ret;
3113 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3115 /* Add the thread state change event, so it wakes
3116 * up if a thread changes to background mode. */
3119 if (check_state_change)
3120 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3122 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3125 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3126 /* See the comment in build_wait_tids() */
3127 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3131 for( i = 0; i < wait->num; i++)
3132 mono_threads_close_thread_handle (wait->handles [i]);
3134 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3137 if (ret < wait->num) {
3138 MonoInternalThread *internal;
3140 internal = wait->threads [ret];
3142 mono_threads_lock ();
3143 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3144 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3145 mono_threads_unlock ();
3149 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3151 struct wait_data *wait=(struct wait_data *)user;
3153 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3154 MonoInternalThread *thread=(MonoInternalThread *)value;
3156 /* Ignore background threads, we abort them later */
3157 /* Do not lock here since it is not needed and the caller holds threads_lock */
3158 if (thread->state & ThreadState_Background) {
3159 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3160 return; /* just leave, ignore */
3163 if (mono_gc_is_finalizer_internal_thread (thread)) {
3164 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3168 if (thread == mono_thread_internal_current ()) {
3169 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3173 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3174 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3178 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3179 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3183 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3184 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3185 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3186 wait->threads[wait->num]=thread;
3189 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3191 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3196 /* Just ignore the rest, we can't do anything with
3203 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3205 struct wait_data *wait=(struct wait_data *)user;
3206 MonoNativeThreadId self = mono_native_thread_id_get ();
3207 MonoInternalThread *thread = (MonoInternalThread *)value;
3209 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3212 /* The finalizer thread is not a background thread */
3213 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3214 && (thread->state & ThreadState_Background) != 0
3215 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3217 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3218 wait->threads[wait->num] = thread;
3221 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3222 mono_thread_internal_abort (thread);
3226 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3227 && !mono_gc_is_finalizer_internal_thread (thread);
3231 * mono_threads_set_shutting_down:
3233 * Is called by a thread that wants to shut down Mono. If the runtime is already
3234 * shutting down, the calling thread is suspended/stopped, and this function never
3238 mono_threads_set_shutting_down (void)
3240 MonoInternalThread *current_thread = mono_thread_internal_current ();
3242 mono_threads_lock ();
3244 if (shutting_down) {
3245 mono_threads_unlock ();
3247 /* Make sure we're properly suspended/stopped */
3249 LOCK_THREAD (current_thread);
3251 if ((current_thread->state & ThreadState_SuspendRequested) ||
3252 (current_thread->state & ThreadState_AbortRequested) ||
3253 (current_thread->state & ThreadState_StopRequested)) {
3254 UNLOCK_THREAD (current_thread);
3255 mono_thread_execute_interruption ();
3257 current_thread->state |= ThreadState_Stopped;
3258 UNLOCK_THREAD (current_thread);
3261 /*since we're killing the thread, detach it.*/
3262 mono_thread_detach_internal (current_thread);
3264 /* Wake up other threads potentially waiting for us */
3265 mono_thread_info_exit (0);
3267 shutting_down = TRUE;
3269 /* Not really a background state change, but this will
3270 * interrupt the main thread if it is waiting for all
3271 * the other threads.
3273 mono_os_event_set (&background_change_event);
3275 mono_threads_unlock ();
3279 void mono_thread_manage (void)
3281 struct wait_data wait_data;
3282 struct wait_data *wait = &wait_data;
3284 memset (wait, 0, sizeof (struct wait_data));
3285 /* join each thread that's still running */
3286 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3288 mono_threads_lock ();
3290 THREAD_DEBUG (g_message("%s: No threads", __func__));
3291 mono_threads_unlock ();
3294 mono_threads_unlock ();
3297 mono_threads_lock ();
3298 if (shutting_down) {
3299 /* somebody else is shutting down */
3300 mono_threads_unlock ();
3303 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3304 mono_g_hash_table_foreach (threads, print_tids, NULL));
3306 mono_os_event_reset (&background_change_event);
3308 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3309 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3310 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3311 mono_threads_unlock ();
3313 /* Something to wait for */
3314 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3315 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3316 } while(wait->num>0);
3318 /* Mono is shutting down, so just wait for the end */
3319 if (!mono_runtime_try_shutdown ()) {
3320 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3321 mono_thread_suspend (mono_thread_internal_current ());
3322 mono_thread_execute_interruption ();
3326 * Remove everything but the finalizer thread and self.
3327 * Also abort all the background threads
3330 mono_threads_lock ();
3333 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3334 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3335 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3337 mono_threads_unlock ();
3339 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3340 if (wait->num > 0) {
3341 /* Something to wait for */
3342 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3344 } while (wait->num > 0);
3347 * give the subthreads a chance to really quit (this is mainly needed
3348 * to get correct user and system times from getrusage/wait/time(1)).
3349 * This could be removed if we avoid pthread_detach() and use pthread_join().
3351 mono_thread_info_yield ();
3355 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3357 MonoInternalThread *thread = (MonoInternalThread*)value;
3358 struct wait_data *wait = (struct wait_data*)user_data;
3361 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3363 * This needs no locking.
3365 if ((thread->state & ThreadState_Suspended) != 0 ||
3366 (thread->state & ThreadState_Stopped) != 0)
3369 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3370 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3371 wait->threads [wait->num] = thread;
3377 * mono_thread_suspend_all_other_threads:
3379 * Suspend all managed threads except the finalizer thread and this thread. It is
3380 * not possible to resume them later.
3382 void mono_thread_suspend_all_other_threads (void)
3384 struct wait_data wait_data;
3385 struct wait_data *wait = &wait_data;
3387 MonoNativeThreadId self = mono_native_thread_id_get ();
3388 guint32 eventidx = 0;
3389 gboolean starting, finished;
3391 memset (wait, 0, sizeof (struct wait_data));
3393 * The other threads could be in an arbitrary state at this point, i.e.
3394 * they could be starting up, shutting down etc. This means that there could be
3395 * threads which are not even in the threads hash table yet.
3399 * First we set a barrier which will be checked by all threads before they
3400 * are added to the threads hash table, and they will exit if the flag is set.
3401 * This ensures that no threads could be added to the hash later.
3402 * We will use shutting_down as the barrier for now.
3404 g_assert (shutting_down);
3407 * We make multiple calls to WaitForMultipleObjects since:
3408 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3409 * - some threads could exit without becoming suspended
3414 * Make a copy of the hashtable since we can't do anything with
3415 * threads while threads_mutex is held.
3418 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3419 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3420 mono_threads_lock ();
3421 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3422 mono_threads_unlock ();
3425 /* Get the suspended events that we'll be waiting for */
3426 for (i = 0; i < wait->num; ++i) {
3427 MonoInternalThread *thread = wait->threads [i];
3429 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3430 || mono_gc_is_finalizer_internal_thread (thread)
3431 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3433 mono_threads_close_thread_handle (wait->handles [i]);
3434 wait->threads [i] = NULL;
3438 LOCK_THREAD (thread);
3440 if ((thread->state & ThreadState_Suspended) != 0 ||
3441 (thread->state & ThreadState_StopRequested) != 0 ||
3442 (thread->state & ThreadState_Stopped) != 0) {
3443 UNLOCK_THREAD (thread);
3444 mono_threads_close_thread_handle (wait->handles [i]);
3445 wait->threads [i] = NULL;
3451 /* Convert abort requests into suspend requests */
3452 if ((thread->state & ThreadState_AbortRequested) != 0)
3453 thread->state &= ~ThreadState_AbortRequested;
3455 thread->state |= ThreadState_SuspendRequested;
3456 mono_os_event_reset (thread->suspended);
3458 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3459 async_suspend_internal (thread, TRUE);
3461 mono_threads_close_thread_handle (wait->handles [i]);
3462 wait->threads [i] = NULL;
3464 if (eventidx <= 0) {
3466 * If there are threads which are starting up, we wait until they
3467 * are suspended when they try to register in the threads hash.
3468 * This is guaranteed to finish, since the threads which can create new
3469 * threads get suspended after a while.
3470 * FIXME: The finalizer thread can still create new threads.
3472 mono_threads_lock ();
3473 if (threads_starting_up)
3474 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3477 mono_threads_unlock ();
3479 mono_thread_info_sleep (100, NULL);
3487 MonoInternalThread *thread;
3488 MonoStackFrameInfo *frames;
3489 int nframes, max_frames;
3490 int nthreads, max_threads;
3491 MonoInternalThread **threads;
3492 } ThreadDumpUserData;
3494 static gboolean thread_dump_requested;
3496 /* This needs to be async safe */
3498 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3500 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3502 if (ud->nframes < ud->max_frames) {
3503 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3510 /* This needs to be async safe */
3511 static SuspendThreadResult
3512 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3514 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3515 MonoInternalThread *thread = user_data->thread;
3518 /* This no longer works with remote unwinding */
3519 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3520 mono_thread_internal_describe (thread, text);
3521 g_string_append (text, "\n");
3524 if (thread == mono_thread_internal_current ())
3525 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3527 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3529 return MonoResumeThread;
3533 int nthreads, max_threads;
3534 MonoInternalThread **threads;
3535 } CollectThreadsUserData;
3538 collect_thread (gpointer key, gpointer value, gpointer user)
3540 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3541 MonoInternalThread *thread = (MonoInternalThread *)value;
3543 if (ud->nthreads < ud->max_threads)
3544 ud->threads [ud->nthreads ++] = thread;
3548 * Collect running threads into the THREADS array.
3549 * THREADS should be an array allocated on the stack.
3552 collect_threads (MonoInternalThread **thread_array, int max_threads)
3554 CollectThreadsUserData ud;
3556 memset (&ud, 0, sizeof (ud));
3557 /* This array contains refs, but its on the stack, so its ok */
3558 ud.threads = thread_array;
3559 ud.max_threads = max_threads;
3561 mono_threads_lock ();
3562 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3563 mono_threads_unlock ();
3569 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3571 GString* text = g_string_new (0);
3573 GError *error = NULL;
3576 ud->thread = thread;
3579 /* Collect frames for the thread */
3580 if (thread == mono_thread_internal_current ()) {
3581 get_thread_dump (mono_thread_info_current (), ud);
3583 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3587 * Do all the non async-safe work outside of get_thread_dump.
3590 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3592 g_string_append_printf (text, "\n\"%s\"", name);
3595 else if (thread->threadpool_thread) {
3596 g_string_append (text, "\n\"<threadpool thread>\"");
3598 g_string_append (text, "\n\"<unnamed thread>\"");
3601 for (i = 0; i < ud->nframes; ++i) {
3602 MonoStackFrameInfo *frame = &ud->frames [i];
3603 MonoMethod *method = NULL;
3605 if (frame->type == FRAME_TYPE_MANAGED)
3606 method = mono_jit_info_get_method (frame->ji);
3609 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3610 g_string_append_printf (text, " %s\n", location);
3613 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3617 fprintf (stdout, "%s", text->str);
3619 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3620 OutputDebugStringA(text->str);
3623 g_string_free (text, TRUE);
3628 mono_threads_perform_thread_dump (void)
3630 ThreadDumpUserData ud;
3631 MonoInternalThread *thread_array [128];
3632 int tindex, nthreads;
3634 if (!thread_dump_requested)
3637 printf ("Full thread dump:\n");
3639 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3640 nthreads = collect_threads (thread_array, 128);
3642 memset (&ud, 0, sizeof (ud));
3643 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3644 ud.max_frames = 256;
3646 for (tindex = 0; tindex < nthreads; ++tindex)
3647 dump_thread (thread_array [tindex], &ud);
3651 thread_dump_requested = FALSE;
3654 /* Obtain the thread dump of all threads */
3656 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3659 ThreadDumpUserData ud;
3660 MonoInternalThread *thread_array [128];
3661 MonoDomain *domain = mono_domain_get ();
3662 MonoDebugSourceLocation *location;
3663 int tindex, nthreads;
3665 mono_error_init (error);
3667 *out_threads = NULL;
3668 *out_stack_frames = NULL;
3670 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3671 nthreads = collect_threads (thread_array, 128);
3673 memset (&ud, 0, sizeof (ud));
3674 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3675 ud.max_frames = 256;
3677 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3680 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3684 for (tindex = 0; tindex < nthreads; ++tindex) {
3685 MonoInternalThread *thread = thread_array [tindex];
3686 MonoArray *thread_frames;
3692 /* Collect frames for the thread */
3693 if (thread == mono_thread_internal_current ()) {
3694 get_thread_dump (mono_thread_info_current (), &ud);
3696 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3699 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3701 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3704 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3706 for (i = 0; i < ud.nframes; ++i) {
3707 MonoStackFrameInfo *frame = &ud.frames [i];
3708 MonoMethod *method = NULL;
3709 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3713 sf->native_offset = frame->native_offset;
3715 if (frame->type == FRAME_TYPE_MANAGED)
3716 method = mono_jit_info_get_method (frame->ji);
3719 sf->method_address = (gsize) frame->ji->code_start;
3721 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3724 MONO_OBJECT_SETREF (sf, method, rm);
3726 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3728 sf->il_offset = location->il_offset;
3730 if (location && location->source_file) {
3731 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3732 sf->line = location->row;
3733 sf->column = location->column;
3735 mono_debug_free_source_location (location);
3740 mono_array_setref (thread_frames, i, sf);
3746 return is_ok (error);
3750 * mono_threads_request_thread_dump:
3752 * Ask all threads except the current to print their stacktrace to stdout.
3755 mono_threads_request_thread_dump (void)
3757 /*The new thread dump code runs out of the finalizer thread. */
3758 thread_dump_requested = TRUE;
3759 mono_gc_finalize_notify ();
3764 gint allocated; /* +1 so that refs [allocated] == NULL */
3768 typedef struct ref_stack RefStack;
3771 ref_stack_new (gint initial_size)
3775 initial_size = MAX (initial_size, 16) + 1;
3776 rs = g_new0 (RefStack, 1);
3777 rs->refs = g_new0 (gpointer, initial_size);
3778 rs->allocated = initial_size;
3783 ref_stack_destroy (gpointer ptr)
3785 RefStack *rs = (RefStack *)ptr;
3794 ref_stack_push (RefStack *rs, gpointer ptr)
3796 g_assert (rs != NULL);
3798 if (rs->bottom >= rs->allocated) {
3799 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3800 rs->allocated <<= 1;
3801 rs->refs [rs->allocated] = NULL;
3803 rs->refs [rs->bottom++] = ptr;
3807 ref_stack_pop (RefStack *rs)
3809 if (rs == NULL || rs->bottom == 0)
3813 rs->refs [rs->bottom] = NULL;
3817 ref_stack_find (RefStack *rs, gpointer ptr)
3824 for (refs = rs->refs; refs && *refs; refs++) {
3832 * mono_thread_push_appdomain_ref:
3834 * Register that the current thread may have references to objects in domain
3835 * @domain on its stack. Each call to this function should be paired with a
3836 * call to pop_appdomain_ref.
3839 mono_thread_push_appdomain_ref (MonoDomain *domain)
3841 MonoInternalThread *thread = mono_thread_internal_current ();
3844 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3845 SPIN_LOCK (thread->lock_thread_id);
3846 if (thread->appdomain_refs == NULL)
3847 thread->appdomain_refs = ref_stack_new (16);
3848 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3849 SPIN_UNLOCK (thread->lock_thread_id);
3854 mono_thread_pop_appdomain_ref (void)
3856 MonoInternalThread *thread = mono_thread_internal_current ();
3859 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3860 SPIN_LOCK (thread->lock_thread_id);
3861 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3862 SPIN_UNLOCK (thread->lock_thread_id);
3867 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3870 SPIN_LOCK (thread->lock_thread_id);
3871 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3872 SPIN_UNLOCK (thread->lock_thread_id);
3877 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3879 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3882 typedef struct abort_appdomain_data {
3883 struct wait_data wait;
3885 } abort_appdomain_data;
3888 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3890 MonoInternalThread *thread = (MonoInternalThread*)value;
3891 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3892 MonoDomain *domain = data->domain;
3894 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3895 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3897 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3898 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3899 data->wait.threads [data->wait.num] = thread;
3902 /* Just ignore the rest, we can't do anything with
3910 * mono_threads_abort_appdomain_threads:
3912 * Abort threads which has references to the given appdomain.
3915 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3917 #ifdef __native_client__
3921 abort_appdomain_data user_data;
3923 int orig_timeout = timeout;
3926 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3928 start_time = mono_msec_ticks ();
3930 mono_threads_lock ();
3932 user_data.domain = domain;
3933 user_data.wait.num = 0;
3934 /* This shouldn't take any locks */
3935 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3936 mono_threads_unlock ();
3938 if (user_data.wait.num > 0) {
3939 /* Abort the threads outside the threads lock */
3940 for (i = 0; i < user_data.wait.num; ++i)
3941 mono_thread_internal_abort (user_data.wait.threads [i]);
3944 * We should wait for the threads either to abort, or to leave the
3945 * domain. We can't do the latter, so we wait with a timeout.
3947 wait_for_tids (&user_data.wait, 100, FALSE);
3950 /* Update remaining time */
3951 timeout -= mono_msec_ticks () - start_time;
3952 start_time = mono_msec_ticks ();
3954 if (orig_timeout != -1 && timeout < 0)
3957 while (user_data.wait.num > 0);
3959 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3965 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3967 MonoInternalThread *thread = (MonoInternalThread*)value;
3968 MonoDomain *domain = (MonoDomain*)user_data;
3971 /* No locking needed here */
3972 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3974 if (thread->cached_culture_info) {
3975 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3976 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3977 if (obj && obj->vtable->domain == domain)
3978 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3984 * mono_threads_clear_cached_culture:
3986 * Clear the cached_current_culture from all threads if it is in the
3990 mono_threads_clear_cached_culture (MonoDomain *domain)
3992 mono_threads_lock ();
3993 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3994 mono_threads_unlock ();
3998 * mono_thread_get_undeniable_exception:
4000 * Return an exception which needs to be raised when leaving a catch clause.
4001 * This is used for undeniable exception propagation.
4004 mono_thread_get_undeniable_exception (void)
4006 MonoInternalThread *thread = mono_thread_internal_current ();
4008 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
4011 // We don't want to have our exception effect calls made by
4012 // the catching block
4014 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
4018 * FIXME: Clear the abort exception and return an AppDomainUnloaded
4019 * exception if the thread no longer references a dying appdomain.
4021 thread->abort_exc->trace_ips = NULL;
4022 thread->abort_exc->stack_trace = NULL;
4023 return thread->abort_exc;
4026 #if MONO_SMALL_CONFIG
4027 #define NUM_STATIC_DATA_IDX 4
4028 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4032 #define NUM_STATIC_DATA_IDX 8
4033 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4034 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
4038 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4039 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4042 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4044 gpointer *static_data = (gpointer *)addr;
4046 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4047 void **ptr = (void **)static_data [i];
4052 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4053 void **p = ptr + idx;
4056 mark_func ((MonoObject**)p, gc_data);
4062 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4064 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4068 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4070 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4074 * mono_alloc_static_data
4076 * Allocate memory blocks for storing threads or context static data
4079 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4081 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4084 gpointer* static_data = *static_data_ptr;
4086 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4087 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4089 if (mono_gc_user_markers_supported ()) {
4090 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4091 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4093 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4094 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4097 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4098 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4099 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4100 *static_data_ptr = static_data;
4101 static_data [0] = static_data;
4104 for (i = 1; i <= idx; ++i) {
4105 if (static_data [i])
4108 if (mono_gc_user_markers_supported ())
4109 static_data [i] = g_malloc0 (static_data_size [i]);
4111 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4112 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4113 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4118 mono_free_static_data (gpointer* static_data)
4121 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4122 gpointer p = static_data [i];
4126 * At this point, the static data pointer array is still registered with the
4127 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4128 * data. Freeing the individual arrays without first nulling their slots
4129 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4130 * such an already freed array. See bug #13813.
4132 static_data [i] = NULL;
4133 mono_memory_write_barrier ();
4134 if (mono_gc_user_markers_supported ())
4137 mono_gc_free_fixed (p);
4139 mono_gc_free_fixed (static_data);
4143 * mono_init_static_data_info
4145 * Initializes static data counters
4147 static void mono_init_static_data_info (StaticDataInfo *static_data)
4149 static_data->idx = 0;
4150 static_data->offset = 0;
4151 static_data->freelist = NULL;
4155 * mono_alloc_static_data_slot
4157 * Generates an offset for static data. static_data contains the counters
4158 * used to generate it.
4161 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4163 if (!static_data->idx && !static_data->offset) {
4165 * we use the first chunk of the first allocation also as
4166 * an array for the rest of the data
4168 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4170 static_data->offset += align - 1;
4171 static_data->offset &= ~(align - 1);
4172 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4173 static_data->idx ++;
4174 g_assert (size <= static_data_size [static_data->idx]);
4175 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4176 static_data->offset = 0;
4178 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4179 static_data->offset += size;
4184 * LOCKING: requires that threads_mutex is held
4187 context_adjust_static_data (MonoAppContext *ctx)
4189 if (context_static_info.offset || context_static_info.idx > 0) {
4190 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4191 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4192 ctx->data->static_data = ctx->static_data;
4197 * LOCKING: requires that threads_mutex is held
4200 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4202 MonoInternalThread *thread = (MonoInternalThread *)value;
4203 guint32 offset = GPOINTER_TO_UINT (user);
4205 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4209 * LOCKING: requires that threads_mutex is held
4212 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4214 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4219 guint32 offset = GPOINTER_TO_UINT (user);
4220 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4221 ctx->data->static_data = ctx->static_data;
4224 static StaticDataFreeList*
4225 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4227 StaticDataFreeList* prev = NULL;
4228 StaticDataFreeList* tmp = static_data->freelist;
4230 if (tmp->size == size) {
4232 prev->next = tmp->next;
4234 static_data->freelist = tmp->next;
4243 #if SIZEOF_VOID_P == 4
4250 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4252 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4254 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4255 MonoBitSet *rb = sets [idx];
4256 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4257 offset /= sizeof (uintptr_t);
4258 /* offset is now the bitmap offset */
4259 for (int i = 0; i < numbits; ++i) {
4260 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4261 mono_bitset_set_fast (rb, offset + i);
4266 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4268 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4269 MonoBitSet *rb = sets [idx];
4270 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4271 offset /= sizeof (uintptr_t);
4272 /* offset is now the bitmap offset */
4273 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4274 mono_bitset_clear_fast (rb, offset + i);
4278 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4280 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4282 StaticDataInfo *info;
4285 if (static_type == SPECIAL_STATIC_THREAD) {
4286 info = &thread_static_info;
4287 sets = thread_reference_bitmaps;
4289 info = &context_static_info;
4290 sets = context_reference_bitmaps;
4293 mono_threads_lock ();
4295 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4299 offset = item->offset;
4302 offset = mono_alloc_static_data_slot (info, size, align);
4305 update_reference_bitmap (sets, offset, bitmap, numbits);
4307 if (static_type == SPECIAL_STATIC_THREAD) {
4308 /* This can be called during startup */
4309 if (threads != NULL)
4310 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4312 if (contexts != NULL)
4313 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4315 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4318 mono_threads_unlock ();
4324 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4326 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4328 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4329 return get_thread_static_data (thread, offset);
4331 return get_context_static_data (thread->current_appcontext, offset);
4336 mono_get_special_static_data (guint32 offset)
4338 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4347 * LOCKING: requires that threads_mutex is held
4350 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4352 MonoInternalThread *thread = (MonoInternalThread *)value;
4353 OffsetSize *data = (OffsetSize *)user;
4354 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4355 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4358 if (!thread->static_data || !thread->static_data [idx])
4360 ptr = ((char*) thread->static_data [idx]) + off;
4361 mono_gc_bzero_atomic (ptr, data->size);
4365 * LOCKING: requires that threads_mutex is held
4368 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4370 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4375 OffsetSize *data = (OffsetSize *)user;
4376 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4377 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4380 if (!ctx->static_data || !ctx->static_data [idx])
4383 ptr = ((char*) ctx->static_data [idx]) + off;
4384 mono_gc_bzero_atomic (ptr, data->size);
4388 do_free_special_slot (guint32 offset, guint32 size)
4390 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4392 StaticDataInfo *info;
4394 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4395 info = &thread_static_info;
4396 sets = thread_reference_bitmaps;
4398 info = &context_static_info;
4399 sets = context_reference_bitmaps;
4402 guint32 data_offset = offset;
4403 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4404 OffsetSize data = { data_offset, size };
4406 clear_reference_bitmap (sets, data.offset, data.size);
4408 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4409 if (threads != NULL)
4410 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4412 if (contexts != NULL)
4413 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4416 if (!mono_runtime_is_shutting_down ()) {
4417 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4419 item->offset = offset;
4422 item->next = info->freelist;
4423 info->freelist = item;
4428 do_free_special (gpointer key, gpointer value, gpointer data)
4430 MonoClassField *field = (MonoClassField *)key;
4431 guint32 offset = GPOINTER_TO_UINT (value);
4434 size = mono_type_size (field->type, &align);
4435 do_free_special_slot (offset, size);
4439 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4441 mono_threads_lock ();
4443 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4445 mono_threads_unlock ();
4449 static void CALLBACK dummy_apc (ULONG_PTR param)
4455 * mono_thread_execute_interruption
4457 * Performs the operation that the requested thread state requires (abort,
4460 static MonoException*
4461 mono_thread_execute_interruption (void)
4463 MonoInternalThread *thread = mono_thread_internal_current ();
4464 MonoThread *sys_thread = mono_thread_current ();
4466 LOCK_THREAD (thread);
4468 /* MonoThread::interruption_requested can only be changed with atomics */
4469 if (mono_thread_clear_interruption_requested (thread)) {
4470 /* this will consume pending APC calls */
4472 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4474 InterlockedDecrement (&thread_interruption_requested);
4476 /* Clear the interrupted flag of the thread so it can wait again */
4477 mono_thread_info_clear_self_interrupt ();
4480 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4481 if (sys_thread->pending_exception) {
4484 exc = sys_thread->pending_exception;
4485 sys_thread->pending_exception = NULL;
4487 UNLOCK_THREAD (thread);
4489 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4490 UNLOCK_THREAD (thread);
4491 g_assert (sys_thread->pending_exception == NULL);
4492 if (thread->abort_exc == NULL) {
4494 * This might be racy, but it has to be called outside the lock
4495 * since it calls managed code.
4497 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4499 return thread->abort_exc;
4501 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4502 /* calls UNLOCK_THREAD (thread) */
4503 self_suspend_internal ();
4506 else if ((thread->state & ThreadState_StopRequested) != 0) {
4507 /* FIXME: do this through the JIT? */
4509 UNLOCK_THREAD (thread);
4511 mono_thread_exit ();
4513 } else if (thread->thread_interrupt_requested) {
4515 thread->thread_interrupt_requested = FALSE;
4516 UNLOCK_THREAD (thread);
4518 return(mono_get_exception_thread_interrupted ());
4521 UNLOCK_THREAD (thread);
4527 * mono_thread_request_interruption
4529 * A signal handler can call this method to request the interruption of a
4530 * thread. The result of the interruption will depend on the current state of
4531 * the thread. If the result is an exception that needs to be throw, it is
4532 * provided as return value.
4535 mono_thread_request_interruption (gboolean running_managed)
4537 MonoInternalThread *thread = mono_thread_internal_current ();
4539 /* The thread may already be stopping */
4544 if (thread->interrupt_on_stop &&
4545 thread->state & ThreadState_StopRequested &&
4546 thread->state & ThreadState_Background)
4549 if (!mono_thread_set_interruption_requested (thread))
4551 InterlockedIncrement (&thread_interruption_requested);
4553 if (!running_managed || is_running_protected_wrapper ()) {
4554 /* Can't stop while in unmanaged code. Increase the global interruption
4555 request count. When exiting the unmanaged method the count will be
4556 checked and the thread will be interrupted. */
4558 /* this will awake the thread if it is in WaitForSingleObject
4560 /* Our implementation of this function ignores the func argument */
4562 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4564 mono_thread_info_self_interrupt ();
4569 return mono_thread_execute_interruption ();
4573 /*This function should be called by a thread after it has exited all of
4574 * its handle blocks at interruption time.*/
4576 mono_thread_resume_interruption (void)
4578 MonoInternalThread *thread = mono_thread_internal_current ();
4579 gboolean still_aborting;
4581 /* The thread may already be stopping */
4585 LOCK_THREAD (thread);
4586 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4587 UNLOCK_THREAD (thread);
4589 /*This can happen if the protected block called Thread::ResetAbort*/
4590 if (!still_aborting)
4593 if (!mono_thread_set_interruption_requested (thread))
4595 InterlockedIncrement (&thread_interruption_requested);
4597 mono_thread_info_self_interrupt ();
4599 return mono_thread_execute_interruption ();
4602 gboolean mono_thread_interruption_requested ()
4604 if (thread_interruption_requested) {
4605 MonoInternalThread *thread = mono_thread_internal_current ();
4606 /* The thread may already be stopping */
4608 return mono_thread_get_interruption_requested (thread);
4613 static MonoException*
4614 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4616 MonoInternalThread *thread = mono_thread_internal_current ();
4618 /* The thread may already be stopping */
4621 if (!mono_thread_get_interruption_requested (thread))
4623 if (!bypass_abort_protection && is_running_protected_wrapper ())
4626 return mono_thread_execute_interruption ();
4630 * Performs the interruption of the current thread, if one has been requested,
4631 * and the thread is not running a protected wrapper.
4632 * Return the exception which needs to be thrown, if any.
4635 mono_thread_interruption_checkpoint (void)
4637 return mono_thread_interruption_checkpoint_request (FALSE);
4641 * Performs the interruption of the current thread, if one has been requested.
4642 * Return the exception which needs to be thrown, if any.
4645 mono_thread_force_interruption_checkpoint_noraise (void)
4647 return mono_thread_interruption_checkpoint_request (TRUE);
4651 * mono_set_pending_exception:
4653 * Set the pending exception of the current thread to EXC.
4654 * The exception will be thrown when execution returns to managed code.
4657 mono_set_pending_exception (MonoException *exc)
4659 MonoThread *thread = mono_thread_current ();
4661 /* The thread may already be stopping */
4665 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4667 mono_thread_request_interruption (FALSE);
4671 * mono_thread_interruption_request_flag:
4673 * Returns the address of a flag that will be non-zero if an interruption has
4674 * been requested for a thread. The thread to interrupt may not be the current
4675 * thread, so an additional call to mono_thread_interruption_requested() or
4676 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4679 gint32* mono_thread_interruption_request_flag ()
4681 return &thread_interruption_requested;
4685 mono_thread_init_apartment_state (void)
4688 MonoInternalThread* thread = mono_thread_internal_current ();
4690 /* Positive return value indicates success, either
4691 * S_OK if this is first CoInitialize call, or
4692 * S_FALSE if CoInitialize already called, but with same
4693 * threading model. A negative value indicates failure,
4694 * probably due to trying to change the threading model.
4696 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4697 ? COINIT_APARTMENTTHREADED
4698 : COINIT_MULTITHREADED) < 0) {
4699 thread->apartment_state = ThreadApartmentState_Unknown;
4705 mono_thread_cleanup_apartment_state (void)
4708 MonoInternalThread* thread = mono_thread_internal_current ();
4710 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4717 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4719 LOCK_THREAD (thread);
4720 thread->state |= state;
4721 UNLOCK_THREAD (thread);
4725 * mono_thread_test_and_set_state:
4727 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4729 * Returns TRUE is @set was OR'd in.
4732 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4734 LOCK_THREAD (thread);
4736 if ((thread->state & test) != 0) {
4737 UNLOCK_THREAD (thread);
4741 thread->state |= set;
4742 UNLOCK_THREAD (thread);
4748 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4750 LOCK_THREAD (thread);
4751 thread->state &= ~state;
4752 UNLOCK_THREAD (thread);
4756 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4758 gboolean ret = FALSE;
4760 LOCK_THREAD (thread);
4762 if ((thread->state & test) != 0) {
4766 UNLOCK_THREAD (thread);
4772 self_interrupt_thread (void *_unused)
4775 MonoThreadInfo *info;
4777 exc = mono_thread_execute_interruption ();
4779 if (mono_threads_is_coop_enabled ()) {
4780 /* We can return from an async call in coop, as
4781 * it's simply called when exiting the safepoint */
4785 g_error ("%s: we can't resume from an async call", __func__);
4788 info = mono_thread_info_current ();
4790 /* We must use _with_context since we didn't trampoline into the runtime */
4791 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. */
4795 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4799 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4803 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4805 MonoJitInfo **dest = (MonoJitInfo **)data;
4811 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4813 MonoJitInfo *ji = NULL;
4818 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4819 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4820 * where we hold runtime locks.
4822 if (!mono_threads_is_coop_enabled ())
4823 mono_thread_info_set_is_async_context (TRUE);
4824 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4825 if (!mono_threads_is_coop_enabled ())
4826 mono_thread_info_set_is_async_context (FALSE);
4831 MonoInternalThread *thread;
4832 gboolean install_async_abort;
4833 MonoThreadInfoInterruptToken *interrupt_token;
4836 static SuspendThreadResult
4837 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4839 AbortThreadData *data = (AbortThreadData *)ud;
4840 MonoInternalThread *thread = data->thread;
4841 MonoJitInfo *ji = NULL;
4842 gboolean protected_wrapper;
4843 gboolean running_managed;
4845 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4846 return MonoResumeThread;
4849 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4850 The protected block code will give them a chance when appropriate.
4852 if (mono_thread_get_abort_prot_block_count (thread) > 0)
4853 return MonoResumeThread;
4855 /*someone is already interrupting it*/
4856 if (!mono_thread_set_interruption_requested (thread))
4857 return MonoResumeThread;
4859 InterlockedIncrement (&thread_interruption_requested);
4861 ji = mono_thread_info_get_last_managed (info);
4862 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4863 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4865 if (!protected_wrapper && running_managed) {
4866 /*We are in managed code*/
4867 /*Set the thread to call */
4868 if (data->install_async_abort)
4869 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4870 return MonoResumeThread;
4873 * This will cause waits to be broken.
4874 * It will also prevent the thread from entering a wait, so if the thread returns
4875 * from the wait before it receives the abort signal, it will just spin in the wait
4876 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4879 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4881 return MonoResumeThread;
4886 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4888 AbortThreadData data;
4890 g_assert (thread != mono_thread_internal_current ());
4892 data.thread = thread;
4893 data.install_async_abort = install_async_abort;
4894 data.interrupt_token = NULL;
4896 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4897 if (data.interrupt_token)
4898 mono_thread_info_finish_interrupt (data.interrupt_token);
4899 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4903 self_abort_internal (MonoError *error)
4907 mono_error_init (error);
4909 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4910 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4913 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.
4915 exc = mono_thread_request_interruption (TRUE);
4917 mono_error_set_exception_instance (error, exc);
4919 mono_thread_info_self_interrupt ();
4923 MonoInternalThread *thread;
4925 MonoThreadInfoInterruptToken *interrupt_token;
4926 } SuspendThreadData;
4928 static SuspendThreadResult
4929 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4931 SuspendThreadData *data = (SuspendThreadData *)ud;
4932 MonoInternalThread *thread = data->thread;
4933 MonoJitInfo *ji = NULL;
4934 gboolean protected_wrapper;
4935 gboolean running_managed;
4937 ji = mono_thread_info_get_last_managed (info);
4938 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4939 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4941 if (running_managed && !protected_wrapper) {
4942 if (mono_threads_is_coop_enabled ()) {
4943 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4944 return MonoResumeThread;
4946 thread->state &= ~ThreadState_SuspendRequested;
4947 thread->state |= ThreadState_Suspended;
4948 return KeepSuspended;
4951 if (mono_thread_set_interruption_requested (thread))
4952 InterlockedIncrement (&thread_interruption_requested);
4953 if (data->interrupt)
4954 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4956 return MonoResumeThread;
4960 /* LOCKING: called with @thread synch_cs held, and releases it */
4962 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4964 SuspendThreadData data;
4966 g_assert (thread != mono_thread_internal_current ());
4968 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4970 thread->self_suspended = FALSE;
4972 data.thread = thread;
4973 data.interrupt = interrupt;
4974 data.interrupt_token = NULL;
4976 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4977 if (data.interrupt_token)
4978 mono_thread_info_finish_interrupt (data.interrupt_token);
4980 UNLOCK_THREAD (thread);
4983 /* LOCKING: called with @thread synch_cs held, and releases it */
4985 self_suspend_internal (void)
4987 MonoInternalThread *thread;
4989 MonoOSEventWaitRet res;
4991 thread = mono_thread_internal_current ();
4993 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4995 thread->self_suspended = TRUE;
4997 thread->state &= ~ThreadState_SuspendRequested;
4998 thread->state |= ThreadState_Suspended;
5000 UNLOCK_THREAD (thread);
5002 event = thread->suspended;
5005 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT);
5006 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
5011 * mono_thread_is_foreign:
5012 * @thread: the thread to query
5014 * This function allows one to determine if a thread was created by the mono runtime and has
5015 * a well defined lifecycle or it's a foreigh one, created by the native environment.
5017 * Returns: TRUE if @thread was not created by the runtime.
5020 mono_thread_is_foreign (MonoThread *thread)
5022 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
5023 return info->runtime_thread == FALSE;
5027 * mono_add_joinable_thread:
5029 * Add TID to the list of joinable threads.
5030 * LOCKING: Acquires the threads lock.
5033 mono_threads_add_joinable_thread (gpointer tid)
5037 * We cannot detach from threads because it causes problems like
5038 * 2fd16f60/r114307. So we collect them and join them when
5039 * we have time (in he finalizer thread).
5041 joinable_threads_lock ();
5042 if (!joinable_threads)
5043 joinable_threads = g_hash_table_new (NULL, NULL);
5044 g_hash_table_insert (joinable_threads, tid, tid);
5045 joinable_thread_count ++;
5046 joinable_threads_unlock ();
5048 mono_gc_finalize_notify ();
5053 * mono_threads_join_threads:
5055 * Join all joinable threads. This is called from the finalizer thread.
5056 * LOCKING: Acquires the threads lock.
5059 mono_threads_join_threads (void)
5062 GHashTableIter iter;
5069 if (!joinable_thread_count)
5073 joinable_threads_lock ();
5075 if (g_hash_table_size (joinable_threads)) {
5076 g_hash_table_iter_init (&iter, joinable_threads);
5077 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5078 thread = (pthread_t)tid;
5079 g_hash_table_remove (joinable_threads, key);
5080 joinable_thread_count --;
5083 joinable_threads_unlock ();
5085 if (thread != pthread_self ()) {
5087 /* This shouldn't block */
5088 mono_threads_join_lock ();
5089 mono_native_thread_join (thread);
5090 mono_threads_join_unlock ();
5103 * Wait for thread TID to exit.
5104 * LOCKING: Acquires the threads lock.
5107 mono_thread_join (gpointer tid)
5111 gboolean found = FALSE;
5113 joinable_threads_lock ();
5114 if (!joinable_threads)
5115 joinable_threads = g_hash_table_new (NULL, NULL);
5116 if (g_hash_table_lookup (joinable_threads, tid)) {
5117 g_hash_table_remove (joinable_threads, tid);
5118 joinable_thread_count --;
5121 joinable_threads_unlock ();
5124 thread = (pthread_t)tid;
5126 mono_native_thread_join (thread);
5132 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5134 if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5135 mono_thread_interruption_checkpoint ();
5139 mono_thread_internal_unhandled_exception (MonoObject* exc)
5141 MonoClass *klass = exc->vtable->klass;
5142 if (is_threadabort_exception (klass)) {
5143 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5144 } else if (!is_appdomainunloaded_exception (klass)
5145 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5146 mono_unhandled_exception (exc);
5147 if (mono_environment_exitcode_get () == 1) {
5148 mono_environment_exitcode_set (255);
5149 mono_invoke_unhandled_exception_hook (exc);
5150 g_assert_not_reached ();
5156 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5159 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5160 mono_error_set_pending_exception (&error);
5164 * mono_threads_attach_coop: called by native->managed wrappers
5168 * - @return: the original domain which needs to be restored, or NULL.
5171 * - @dummy: contains the original domain
5172 * - @return: a cookie containing current MonoThreadInfo*.
5175 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5178 gboolean fresh_thread = FALSE;
5181 /* Happens when called from AOTed code which is only used in the root domain. */
5182 domain = mono_get_root_domain ();
5187 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5188 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5189 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5190 * we're only responsible for making the cookie. */
5191 if (mono_threads_is_coop_enabled ()) {
5192 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5193 fresh_thread = !info || !mono_thread_info_is_live (info);
5196 if (!mono_thread_internal_current ()) {
5197 mono_thread_attach_full (domain, FALSE);
5200 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5203 orig = mono_domain_get ();
5205 mono_domain_set (domain, TRUE);
5207 if (!mono_threads_is_coop_enabled ())
5208 return orig != domain ? orig : NULL;
5212 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5213 * return the right cookie. */
5214 return mono_threads_enter_gc_unsafe_region_cookie ();
5217 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5218 return mono_threads_enter_gc_unsafe_region (dummy);
5223 * mono_threads_detach_coop: called by native->managed wrappers
5226 * - @cookie: the original domain which needs to be restored, or NULL.
5230 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5231 * - @dummy: contains the original domain
5234 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5236 MonoDomain *domain, *orig;
5238 if (!mono_threads_is_coop_enabled ()) {
5239 orig = (MonoDomain*) cookie;
5241 mono_domain_set (orig, TRUE);
5243 orig = (MonoDomain*) *dummy;
5245 domain = mono_domain_get ();
5248 /* it won't do anything if cookie is NULL
5249 * thread state RUNNING -> (RUNNING|BLOCKING) */
5250 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5252 if (orig != domain) {
5254 mono_domain_unset ();
5256 mono_domain_set (orig, TRUE);
5262 mono_thread_try_resume_interruption (void)
5264 MonoInternalThread *thread;
5266 thread = mono_thread_internal_current ();
5267 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
5269 if (mono_thread_get_abort_prot_block_count (thread) > 0 || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5272 return mono_thread_resume_interruption ();
5276 /* Returns TRUE if the current thread is ready to be interrupted. */
5278 mono_threads_is_ready_to_be_interrupted (void)
5280 MonoInternalThread *thread;
5282 thread = mono_thread_internal_current ();
5283 LOCK_THREAD (thread);
5284 if (thread->state & (MonoThreadState)(ThreadState_StopRequested | ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5285 UNLOCK_THREAD (thread);
5289 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5290 UNLOCK_THREAD (thread);
5294 UNLOCK_THREAD (thread);
5300 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5302 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5304 if (internal->thread_info) {
5305 g_string_append (text, ", state : ");
5306 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5309 if (internal->owned_mutexes) {
5312 g_string_append (text, ", owns : [");
5313 for (i = 0; i < internal->owned_mutexes->len; i++)
5314 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5315 g_string_append (text, "]");
5320 mono_thread_internal_is_current (MonoInternalThread *internal)
5322 g_assert (internal);
5323 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));