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-threads-coop.h>
45 #include <mono/utils/mono-error-internals.h>
46 #include <mono/utils/os-event.h>
47 #include <mono/utils/mono-threads-debug.h>
48 #include <mono/metadata/w32handle.h>
49 #include <mono/metadata/w32event.h>
50 #include <mono/metadata/w32mutex.h>
52 #include <mono/metadata/gc-internals.h>
53 #include <mono/metadata/reflection-internals.h>
54 #include <mono/metadata/abi-details.h>
55 #include <mono/metadata/w32error.h>
56 #include <mono/utils/w32api.h>
62 #if defined(HOST_WIN32)
66 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
67 #define USE_TKILL_ON_ANDROID 1
70 #ifdef PLATFORM_ANDROID
73 #ifdef USE_TKILL_ON_ANDROID
74 extern int tkill (pid_t tid, int signal);
78 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
79 #define THREAD_DEBUG(a)
80 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
81 #define THREAD_WAIT_DEBUG(a)
82 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
83 #define LIBGC_DEBUG(a)
85 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
86 #define SPIN_LOCK(i) do { \
87 if (SPIN_TRYLOCK (i)) \
91 #define SPIN_UNLOCK(i) i = 0
93 #define LOCK_THREAD(thread) lock_thread((thread))
94 #define UNLOCK_THREAD(thread) unlock_thread((thread))
106 typedef struct _StaticDataFreeList StaticDataFreeList;
107 struct _StaticDataFreeList {
108 StaticDataFreeList *next;
116 StaticDataFreeList *freelist;
119 /* Number of cached culture objects in the MonoThread->cached_culture_info array
120 * (per-type): we use the first NUM entries for CultureInfo and the last for
121 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
123 #define NUM_CACHED_CULTURES 4
124 #define CULTURES_START_IDX 0
125 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
127 /* Controls access to the 'threads' hash table */
128 static void mono_threads_lock (void);
129 static void mono_threads_unlock (void);
130 static MonoCoopMutex threads_mutex;
132 /* Controls access to the 'joinable_threads' hash table */
133 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
134 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
135 static mono_mutex_t joinable_threads_mutex;
137 /* Holds current status of static data heap */
138 static StaticDataInfo thread_static_info;
139 static StaticDataInfo context_static_info;
141 /* The hash of existing threads (key is thread ID, value is
142 * MonoInternalThread*) that need joining before exit
144 static MonoGHashTable *threads=NULL;
146 /* List of app context GC handles.
147 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
149 static GHashTable *contexts = NULL;
151 /* Cleanup queue for contexts. */
152 static MonoReferenceQueue *context_queue;
155 * Threads which are starting up and they are not in the 'threads' hash yet.
156 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
157 * Protected by mono_threads_lock ().
159 static MonoGHashTable *threads_starting_up = NULL;
162 /* Protected by the threads lock */
163 static GHashTable *joinable_threads;
164 static int joinable_thread_count;
166 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
167 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
169 /* function called at thread start */
170 static MonoThreadStartCB mono_thread_start_cb = NULL;
172 /* function called at thread attach */
173 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
175 /* function called at thread cleanup */
176 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
178 /* The default stack size for each thread */
179 static guint32 default_stacksize = 0;
180 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
182 static void context_adjust_static_data (MonoAppContext *ctx);
183 static void mono_free_static_data (gpointer* static_data);
184 static void mono_init_static_data_info (StaticDataInfo *static_data);
185 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
186 static gboolean mono_thread_resume (MonoInternalThread* thread);
187 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
188 static void self_abort_internal (MonoError *error);
189 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
190 static void self_suspend_internal (void);
192 static MonoException* mono_thread_execute_interruption (void);
193 static void ref_stack_destroy (gpointer rs);
195 /* Spin lock for InterlockedXXX 64 bit functions */
196 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
197 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
198 static mono_mutex_t interlocked_mutex;
200 /* global count of thread interruptions requested */
201 static gint32 thread_interruption_requested = 0;
203 /* Event signaled when a thread changes its background mode */
204 static MonoOSEvent background_change_event;
206 static gboolean shutting_down = FALSE;
208 static gint32 managed_thread_id_counter = 0;
210 /* Class lazy loading functions */
211 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
214 mono_threads_lock (void)
216 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
220 mono_threads_unlock (void)
222 mono_locks_coop_release (&threads_mutex, ThreadsLock);
227 get_next_managed_thread_id (void)
229 return InterlockedIncrement (&managed_thread_id_counter);
233 INTERRUPT_REQUESTED_BIT = 0x1,
234 INTERRUPT_REQUEST_DEFERRED_BIT = 0x2,
235 ABORT_PROT_BLOCK_SHIFT = 2,
236 ABORT_PROT_BLOCK_BITS = 8,
237 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
241 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
243 gsize state = thread->thread_state;
244 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
248 verify_thread_state (gsize state)
250 //can't have both INTERRUPT_REQUESTED_BIT and INTERRUPT_REQUEST_DEFERRED_BIT set at the same time
251 g_assert ((state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) != (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT));
253 //XXX This would be nice to be true, but can happen due to self-aborts (and possibly set-pending-exception)
254 //if prot_count > 0, INTERRUPT_REQUESTED_BIT must never be set
255 // int prot_count = (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
256 // g_assert (!(prot_count > 0 && (state & INTERRUPT_REQUESTED_BIT)));
260 mono_threads_begin_abort_protected_block (void)
262 MonoInternalThread *thread = mono_thread_internal_current ();
263 gsize old_state, new_state;
265 old_state = thread->thread_state;
266 verify_thread_state (old_state);
268 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
271 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)) {
272 if (old_state & INTERRUPT_REQUESTED_BIT)
273 printf ("begin prot happy as it demoted interrupt to deferred interrupt\n");
274 new_state |= INTERRUPT_REQUEST_DEFERRED_BIT;
277 //bounds check abort_prot_count
278 g_assert (new_val > 0);
279 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
280 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
282 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
286 mono_threads_end_abort_protected_block (void)
288 MonoInternalThread *thread = mono_thread_internal_current ();
289 gsize old_state, new_state;
291 old_state = thread->thread_state;
292 verify_thread_state (old_state);
294 int new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
297 if ((old_state & INTERRUPT_REQUEST_DEFERRED_BIT) && new_val == 0) {
298 printf ("end abort on alert, promoted deferred to pront interrupt\n");
299 new_state |= INTERRUPT_REQUESTED_BIT;
302 //bounds check abort_prot_count
303 g_assert (new_val >= 0);
304 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
305 new_state |= new_val << ABORT_PROT_BLOCK_SHIFT;
307 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
308 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
312 //Don't use this function, use inc/dec below
314 mono_thread_abort_prot_block_count_add (MonoInternalThread *thread, int val)
316 gsize old_state, new_state;
318 old_state = thread->thread_state;
319 verify_thread_state (old_state);
321 int new_val = val + ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
322 //bounds check abort_prot_count
323 g_assert (new_val >= 0);
324 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
325 new_state = (old_state & ~ABORT_PROT_BLOCK_MASK) | (new_val << ABORT_PROT_BLOCK_SHIFT);
327 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
331 mono_thread_inc_abort_prot_block_count (MonoInternalThread *thread)
333 mono_thread_abort_prot_block_count_add (thread, 1);
337 mono_thread_dec_abort_prot_block_count (MonoInternalThread *thread)
339 mono_thread_abort_prot_block_count_add (thread, -1);
343 mono_thread_get_interruption_requested (MonoInternalThread *thread)
345 gsize state = thread->thread_state;
346 return (state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
349 /* Returns TRUE is there was a state change */
351 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
353 gsize old_state, new_state;
355 old_state = thread->thread_state;
356 verify_thread_state (old_state);
359 if (!(old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT)))
361 new_state = old_state & ~(INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT);
362 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
366 /* Returns TRUE is there was a state change */
368 mono_thread_set_interruption_requested (MonoInternalThread *thread)
370 //always force when the current thread is doing it to itself.
371 gboolean force_interrupt = thread == mono_thread_internal_current ();
372 gsize old_state, new_state;
374 old_state = thread->thread_state;
375 verify_thread_state (old_state);
377 int prot_count = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT);
379 if (old_state & (INTERRUPT_REQUESTED_BIT | INTERRUPT_REQUEST_DEFERRED_BIT))
382 //If there's an outstanding prot block, we queue it
383 if (prot_count && !force_interrupt) {
384 printf ("set interrupt unhappy, as it's only putting a deferred req %d\n", force_interrupt);
385 new_state = old_state | INTERRUPT_REQUEST_DEFERRED_BIT;
387 new_state = old_state | INTERRUPT_REQUESTED_BIT;
388 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
390 return (new_state & INTERRUPT_REQUESTED_BIT) == INTERRUPT_REQUESTED_BIT;
393 static inline MonoNativeThreadId
394 thread_get_tid (MonoInternalThread *thread)
396 /* We store the tid as a guint64 to keep the object layout constant between platforms */
397 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
400 static void ensure_synch_cs_set (MonoInternalThread *thread)
402 MonoCoopMutex *synch_cs;
404 if (thread->synch_cs != NULL) {
408 synch_cs = g_new0 (MonoCoopMutex, 1);
409 mono_coop_mutex_init_recursive (synch_cs);
411 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
412 synch_cs, NULL) != NULL) {
413 /* Another thread must have installed this CS */
414 mono_coop_mutex_destroy (synch_cs);
420 lock_thread (MonoInternalThread *thread)
422 if (!thread->synch_cs)
423 ensure_synch_cs_set (thread);
425 g_assert (thread->synch_cs);
427 mono_coop_mutex_lock (thread->synch_cs);
431 unlock_thread (MonoInternalThread *thread)
433 mono_coop_mutex_unlock (thread->synch_cs);
436 static inline gboolean
437 is_appdomainunloaded_exception (MonoClass *klass)
439 return klass == mono_class_get_appdomain_unloaded_exception_class ();
442 static inline gboolean
443 is_threadabort_exception (MonoClass *klass)
445 return klass == mono_defaults.threadabortexception_class;
449 * A special static data offset (guint32) consists of 3 parts:
451 * [0] 6-bit index into the array of chunks.
452 * [6] 25-bit offset into the array.
453 * [31] Bit indicating thread or context static.
458 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
469 } SpecialStaticOffset;
471 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
472 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
474 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
475 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
476 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
477 (((SpecialStaticOffset *) &(x))->fields.f)
480 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
482 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
484 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
485 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
487 return ((char *) thread->static_data [idx]) + off;
491 get_context_static_data (MonoAppContext *ctx, guint32 offset)
493 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
495 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
496 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
498 return ((char *) ctx->static_data [idx]) + off;
502 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
504 static MonoClassField *current_thread_field = NULL;
508 if (!current_thread_field) {
509 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
510 g_assert (current_thread_field);
513 mono_class_vtable (domain, mono_defaults.thread_class);
514 mono_domain_lock (domain);
515 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
516 mono_domain_unlock (domain);
519 return (MonoThread **)get_thread_static_data (thread, offset);
523 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
525 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
527 g_assert (current->obj.vtable->domain == domain);
529 g_assert (!*current_thread_ptr);
530 *current_thread_ptr = current;
534 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
540 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
543 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
544 /* only possible failure mode is OOM, from which we don't expect to recover. */
545 mono_error_assert_ok (&error);
547 MONO_OBJECT_SETREF (thread, internal_thread, internal);
552 static MonoInternalThread*
553 create_internal_thread_object (void)
556 MonoInternalThread *thread;
559 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
560 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
561 /* only possible failure mode is OOM, from which we don't exect to recover */
562 mono_error_assert_ok (&error);
564 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
565 mono_coop_mutex_init_recursive (thread->synch_cs);
567 thread->apartment_state = ThreadApartmentState_Unknown;
568 thread->managed_id = get_next_managed_thread_id ();
569 if (mono_gc_is_moving ()) {
570 thread->thread_pinning_ref = thread;
571 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
574 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
576 thread->suspended = g_new0 (MonoOSEvent, 1);
577 mono_os_event_init (thread->suspended, TRUE);
583 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
587 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
588 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
589 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
594 g_assert (internal->native_handle);
596 res = SetThreadPriority (internal->native_handle, priority - 2);
598 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
599 #else /* HOST_WIN32 */
602 struct sched_param param;
605 tid = thread_get_tid (internal);
607 res = pthread_getschedparam (tid, &policy, ¶m);
609 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
611 #ifdef _POSIX_PRIORITY_SCHEDULING
614 /* Necessary to get valid priority range */
616 min = sched_get_priority_min (policy);
617 max = sched_get_priority_max (policy);
619 if (max > 0 && min >= 0 && max > min) {
620 double srange, drange, sposition, dposition;
621 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
623 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
624 dposition = (sposition / srange) * drange;
625 param.sched_priority = (int)(dposition + min);
632 param.sched_priority = 50;
638 param.sched_priority = 0;
641 g_warning ("%s: unknown policy %d", __func__, policy);
646 res = pthread_setschedparam (tid, policy, ¶m);
649 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
652 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
654 #endif /* HOST_WIN32 */
658 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
661 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain, gsize *stack_ptr)
663 MonoThreadInfo *info;
664 MonoInternalThread *internal;
665 MonoDomain *domain, *root_domain;
669 info = mono_thread_info_current ();
671 internal = thread->internal_thread;
672 internal->handle = mono_threads_open_thread_handle (info->handle);
674 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
676 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
677 internal->thread_info = info;
678 internal->small_id = info->small_id;
679 internal->stack_ptr = stack_ptr;
681 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
683 SET_CURRENT_OBJECT (internal);
685 domain = mono_object_domain (thread);
687 mono_thread_push_appdomain_ref (domain);
688 if (!mono_domain_set (domain, force_domain)) {
689 mono_thread_pop_appdomain_ref ();
693 mono_threads_lock ();
695 if (threads_starting_up)
696 mono_g_hash_table_remove (threads_starting_up, thread);
698 if (shutting_down && !force_attach) {
699 mono_threads_unlock ();
704 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
705 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
708 /* We don't need to duplicate thread->handle, because it is
709 * only closed when the thread object is finalized by the GC. */
710 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
712 /* We have to do this here because mono_thread_start_cb
713 * requires that root_domain_thread is set up. */
714 if (thread_static_info.offset || thread_static_info.idx > 0) {
715 /* get the current allocated size */
716 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
717 mono_alloc_static_data (&internal->static_data, offset, TRUE);
720 mono_threads_unlock ();
722 root_domain = mono_get_root_domain ();
724 g_assert (!internal->root_domain_thread);
725 if (domain != root_domain)
726 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
728 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
730 if (domain != root_domain)
731 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
733 set_current_thread_for_domain (domain, internal, thread);
735 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
743 MonoObject *start_delegate;
744 MonoObject *start_delegate_arg;
745 MonoThreadStart start_func;
746 gpointer start_func_arg;
748 MonoCoopSem registered;
751 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
754 MonoThreadStart start_func;
755 void *start_func_arg;
758 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
762 MonoInternalThread *internal;
763 MonoObject *start_delegate;
764 MonoObject *start_delegate_arg;
767 thread = start_info->thread;
768 internal = thread->internal_thread;
769 domain = mono_object_domain (start_info->thread);
771 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
773 if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
774 start_info->failed = TRUE;
776 mono_coop_sem_post (&start_info->registered);
778 if (InterlockedDecrement (&start_info->ref) == 0) {
779 mono_coop_sem_destroy (&start_info->registered);
786 mono_thread_internal_set_priority (internal, internal->priority);
790 start_delegate = start_info->start_delegate;
791 start_delegate_arg = start_info->start_delegate_arg;
792 start_func = start_info->start_func;
793 start_func_arg = start_info->start_func_arg;
795 /* This MUST be called before any managed code can be
796 * executed, as it calls the callback function that (for the
797 * jit) sets the lmf marker.
800 if (mono_thread_start_cb)
801 mono_thread_start_cb (tid, stack_ptr, start_func);
803 /* On 2.0 profile (and higher), set explicitly since state might have been
805 if (internal->apartment_state == ThreadApartmentState_Unknown)
806 internal->apartment_state = ThreadApartmentState_MTA;
808 mono_thread_init_apartment_state ();
810 /* Let the thread that called Start() know we're ready */
811 mono_coop_sem_post (&start_info->registered);
813 if (InterlockedDecrement (&start_info->ref) == 0) {
814 mono_coop_sem_destroy (&start_info->registered);
818 /* start_info is not valid anymore */
822 * Call this after calling start_notify, since the profiler callback might want
823 * to lock the thread, and the lock is held by thread_start () which waits for
826 mono_profiler_thread_start (tid);
828 /* if the name was set before starting, we didn't invoke the profiler callback */
829 if (internal->name) {
830 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
831 mono_profiler_thread_name (internal->tid, tname);
832 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
836 /* start_func is set only for unmanaged start functions */
838 start_func (start_func_arg);
842 g_assert (start_delegate != NULL);
844 /* we may want to handle the exception here. See comment below on unhandled exceptions */
845 args [0] = (gpointer) start_delegate_arg;
846 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
848 if (!mono_error_ok (&error)) {
849 MonoException *ex = mono_error_convert_to_exception (&error);
851 g_assert (ex != NULL);
852 MonoClass *klass = mono_object_get_class (&ex->object);
853 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
854 !is_threadabort_exception (klass)) {
855 mono_unhandled_exception (&ex->object);
856 mono_invoke_unhandled_exception_hook (&ex->object);
857 g_assert_not_reached ();
860 mono_error_cleanup (&error);
864 /* If the thread calls ExitThread at all, this remaining code
865 * will not be executed, but the main thread will eventually
866 * call mono_thread_detach_internal() on this thread's behalf.
869 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
871 /* Do any cleanup needed for apartment state. This
872 * cannot be done in mono_thread_detach_internal since
873 * mono_thread_detach_internal could be called for a
874 * thread other than the current thread.
875 * mono_thread_cleanup_apartment_state cleans up apartment
876 * for the current thead */
877 mono_thread_cleanup_apartment_state ();
879 mono_thread_detach_internal (internal);
886 static gsize WINAPI start_wrapper(void *data)
888 volatile gsize dummy;
890 return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
896 * Common thread creation code.
897 * LOCKING: Acquires the threads lock.
900 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
901 gboolean threadpool_thread, guint32 stack_size, MonoError *error)
903 StartInfo *start_info = NULL;
904 MonoThreadHandle *thread_handle;
905 MonoNativeThreadId tid;
907 gsize stack_set_size;
910 g_assert (!start_func && !start_func_arg);
912 g_assert (!start_delegate);
915 * Join joinable threads to prevent running out of threads since the finalizer
916 * thread might be blocked/backlogged.
918 mono_threads_join_threads ();
920 mono_error_init (error);
922 mono_threads_lock ();
924 mono_threads_unlock ();
927 if (threads_starting_up == NULL) {
928 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
929 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
931 mono_g_hash_table_insert (threads_starting_up, thread, thread);
932 mono_threads_unlock ();
934 internal->threadpool_thread = threadpool_thread;
935 if (threadpool_thread)
936 mono_thread_set_state (internal, ThreadState_Background);
938 start_info = g_new0 (StartInfo, 1);
940 start_info->thread = thread;
941 start_info->start_delegate = start_delegate;
942 start_info->start_delegate_arg = thread->start_obj;
943 start_info->start_func = start_func;
944 start_info->start_func_arg = start_func_arg;
945 start_info->failed = FALSE;
946 mono_coop_sem_init (&start_info->registered, 0);
949 stack_set_size = default_stacksize_for_thread (internal);
953 thread_handle = mono_threads_create_thread (start_wrapper, start_info, &stack_set_size, &tid);
955 if (thread_handle == NULL) {
956 /* The thread couldn't be created, so set an exception */
957 mono_threads_lock ();
958 mono_g_hash_table_remove (threads_starting_up, thread);
959 mono_threads_unlock ();
960 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
961 /* ref is not going to be decremented in start_wrapper_internal */
962 InterlockedDecrement (&start_info->ref);
967 internal->stack_size = (int) stack_set_size;
969 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
972 * Wait for the thread to set up its TLS data etc, so
973 * theres no potential race condition if someone tries
974 * to look up the data believing the thread has
978 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
980 mono_threads_close_thread_handle (thread_handle);
982 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));
984 ret = !start_info->failed;
987 if (InterlockedDecrement (&start_info->ref) == 0) {
988 mono_coop_sem_destroy (&start_info->registered);
995 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
997 if (mono_thread_start_cb) {
998 mono_thread_start_cb (tid, stack_start, func);
1002 void mono_threads_set_default_stacksize (guint32 stacksize)
1004 default_stacksize = stacksize;
1007 guint32 mono_threads_get_default_stacksize (void)
1009 return default_stacksize;
1013 * mono_thread_create_internal:
1015 * ARG should not be a GC reference.
1018 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
1021 MonoInternalThread *internal;
1024 mono_error_init (error);
1026 internal = create_internal_thread_object ();
1028 thread = create_thread_object (domain, internal);
1030 LOCK_THREAD (internal);
1032 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
1033 return_val_if_nok (error, NULL);
1035 UNLOCK_THREAD (internal);
1041 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1044 if (!mono_thread_create_checked (domain, func, arg, &error))
1045 mono_error_cleanup (&error);
1049 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1051 return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
1055 mono_thread_attach (MonoDomain *domain)
1057 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1063 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1065 MonoInternalThread *internal;
1067 MonoNativeThreadId tid;
1070 if (mono_thread_internal_current_is_attached ()) {
1071 if (domain != mono_domain_get ())
1072 mono_domain_set (domain, TRUE);
1073 /* Already attached */
1074 return mono_thread_current ();
1077 if (!mono_gc_register_thread (&domain)) {
1078 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 ());
1081 tid=mono_native_thread_id_get ();
1083 internal = create_internal_thread_object ();
1085 thread = create_thread_object (domain, internal);
1087 if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
1088 /* Mono is shutting down, so just wait for the end */
1090 mono_thread_info_sleep (10000, NULL);
1093 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1095 if (mono_thread_attach_cb) {
1099 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1102 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1104 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1107 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1108 if (!mono_thread_info_current ()->tools_thread)
1109 // FIXME: Need a separate callback
1110 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1116 mono_thread_detach_internal (MonoInternalThread *thread)
1120 g_assert (thread != NULL);
1122 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1125 mono_w32mutex_abandon ();
1128 if (thread->abort_state_handle) {
1129 mono_gchandle_free (thread->abort_state_handle);
1130 thread->abort_state_handle = 0;
1133 thread->abort_exc = NULL;
1134 thread->current_appcontext = NULL;
1137 * This is necessary because otherwise we might have
1138 * cross-domain references which will not get cleaned up when
1139 * the target domain is unloaded.
1141 if (thread->cached_culture_info) {
1143 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
1144 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
1148 * thread->synch_cs can be NULL if this was called after
1149 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1150 * This can happen only during shutdown.
1151 * The shutting_down flag is not always set, so we can't assert on it.
1153 if (thread->synch_cs)
1154 LOCK_THREAD (thread);
1156 thread->state |= ThreadState_Stopped;
1157 thread->state &= ~ThreadState_Background;
1159 if (thread->synch_cs)
1160 UNLOCK_THREAD (thread);
1163 An interruption request has leaked to cleanup. Adjust the global counter.
1165 This can happen is the abort source thread finds the abortee (this) thread
1166 in unmanaged code. If this thread never trips back to managed code or check
1167 the local flag it will be left set and positively unbalance the global counter.
1169 Leaving the counter unbalanced will cause a performance degradation since all threads
1170 will now keep checking their local flags all the time.
1172 if (mono_thread_clear_interruption_requested (thread))
1173 InterlockedDecrement (&thread_interruption_requested);
1175 mono_threads_lock ();
1179 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1180 /* We have to check whether the thread object for the
1181 * tid is still the same in the table because the
1182 * thread might have been destroyed and the tid reused
1183 * in the meantime, in which case the tid would be in
1184 * the table, but with another thread object.
1188 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1192 mono_threads_unlock ();
1194 /* Don't close the handle here, wait for the object finalizer
1195 * to do it. Otherwise, the following race condition applies:
1197 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1199 * 2) Some other handle is reassigned the same slot
1201 * 3) Another thread tries to join the first thread, and
1202 * blocks waiting for the reassigned handle to be signalled
1203 * (which might never happen). This is possible, because the
1204 * thread calling Join() still has a reference to the first
1208 /* if the thread is not in the hash it has been removed already */
1210 mono_domain_unset ();
1211 mono_memory_barrier ();
1213 if (mono_thread_cleanup_fn)
1214 mono_thread_cleanup_fn (thread_get_tid (thread));
1219 mono_release_type_locks (thread);
1221 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1222 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1223 mono_profiler_thread_end (thread->tid);
1225 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1228 * This will signal async signal handlers that the thread has exited.
1229 * The profiler callback needs this to be set, so it cannot be done earlier.
1231 mono_domain_unset ();
1232 mono_memory_barrier ();
1234 if (thread == mono_thread_internal_current ())
1235 mono_thread_pop_appdomain_ref ();
1237 thread->cached_culture_info = NULL;
1239 mono_free_static_data (thread->static_data);
1240 thread->static_data = NULL;
1241 ref_stack_destroy (thread->appdomain_refs);
1242 thread->appdomain_refs = NULL;
1244 g_assert (thread->suspended);
1245 mono_os_event_destroy (thread->suspended);
1246 g_free (thread->suspended);
1247 thread->suspended = NULL;
1249 if (mono_thread_cleanup_fn)
1250 mono_thread_cleanup_fn (thread_get_tid (thread));
1252 mono_memory_barrier ();
1254 if (mono_gc_is_moving ()) {
1255 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1256 thread->thread_pinning_ref = NULL;
1260 SET_CURRENT_OBJECT (NULL);
1261 mono_domain_unset ();
1263 /* Don't need to close the handle to this thread, even though we took a
1264 * reference in mono_thread_attach (), because the GC will do it
1265 * when the Thread object is finalised.
1270 mono_thread_detach (MonoThread *thread)
1273 mono_thread_detach_internal (thread->internal_thread);
1277 * mono_thread_detach_if_exiting:
1279 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1280 * This should be used at the end of embedding code which calls into managed code, and which
1281 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1284 mono_thread_detach_if_exiting (void)
1286 if (mono_thread_info_is_exiting ()) {
1287 MonoInternalThread *thread;
1289 thread = mono_thread_internal_current ();
1291 mono_thread_detach_internal (thread);
1292 mono_thread_info_detach ();
1300 mono_thread_internal_current_is_attached (void)
1302 MonoInternalThread *internal;
1304 internal = GET_CURRENT_OBJECT ();
1312 mono_thread_exit (void)
1314 MonoInternalThread *thread = mono_thread_internal_current ();
1316 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1318 mono_thread_detach_internal (thread);
1320 /* we could add a callback here for embedders to use. */
1321 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1322 exit (mono_environment_exitcode_get ());
1324 mono_thread_info_exit (0);
1328 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1330 MonoInternalThread *internal;
1332 internal = create_internal_thread_object ();
1334 internal->state = ThreadState_Unstarted;
1336 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1340 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1342 return mono_thread_current ();
1346 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1350 MonoInternalThread *internal;
1353 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1355 if (!this_obj->internal_thread)
1356 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1357 internal = this_obj->internal_thread;
1359 LOCK_THREAD (internal);
1361 if ((internal->state & ThreadState_Unstarted) == 0) {
1362 UNLOCK_THREAD (internal);
1363 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1367 if ((internal->state & ThreadState_Aborted) != 0) {
1368 UNLOCK_THREAD (internal);
1372 res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1374 mono_error_cleanup (&error);
1375 UNLOCK_THREAD (internal);
1379 internal->state &= ~ThreadState_Unstarted;
1381 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1383 UNLOCK_THREAD (internal);
1384 return internal->handle;
1388 * This is called from the finalizer of the internal thread object.
1391 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1393 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1396 * Since threads keep a reference to their thread object while running, by
1397 * the time this function is called, the thread has already exited/detached,
1398 * i.e. mono_thread_detach_internal () has ran. The exception is during
1399 * shutdown, when mono_thread_detach_internal () can be called after this.
1401 if (this_obj->handle) {
1402 mono_threads_close_thread_handle (this_obj->handle);
1403 this_obj->handle = NULL;
1407 CloseHandle (this_obj->native_handle);
1410 if (this_obj->synch_cs) {
1411 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1412 this_obj->synch_cs = NULL;
1413 mono_coop_mutex_destroy (synch_cs);
1417 if (this_obj->name) {
1418 void *name = this_obj->name;
1419 this_obj->name = NULL;
1425 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1428 MonoInternalThread *thread = mono_thread_internal_current ();
1430 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1432 if (mono_thread_current_check_pending_interrupt ())
1436 gboolean alerted = FALSE;
1438 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1440 res = mono_thread_info_sleep (ms, &alerted);
1442 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1445 MonoException* exc = mono_thread_execute_interruption ();
1447 mono_raise_exception (exc);
1449 // FIXME: !MONO_INFINITE_WAIT
1450 if (ms != MONO_INFINITE_WAIT)
1459 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1464 ves_icall_System_Threading_Thread_GetDomainID (void)
1466 return mono_domain_get()->domain_id;
1470 ves_icall_System_Threading_Thread_Yield (void)
1472 return mono_thread_info_yield ();
1476 * mono_thread_get_name:
1478 * Return the name of the thread. NAME_LEN is set to the length of the name.
1479 * Return NULL if the thread has no name. The returned memory is owned by the
1483 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1487 LOCK_THREAD (this_obj);
1489 if (!this_obj->name) {
1493 *name_len = this_obj->name_len;
1494 res = g_new (gunichar2, this_obj->name_len);
1495 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1498 UNLOCK_THREAD (this_obj);
1504 * mono_thread_get_name_utf8:
1506 * Return the name of the thread in UTF-8.
1507 * Return NULL if the thread has no name.
1508 * The returned memory is owned by the caller.
1511 mono_thread_get_name_utf8 (MonoThread *thread)
1516 MonoInternalThread *internal = thread->internal_thread;
1517 if (internal == NULL)
1520 LOCK_THREAD (internal);
1522 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1524 UNLOCK_THREAD (internal);
1530 * mono_thread_get_managed_id:
1532 * Return the Thread.ManagedThreadId value of `thread`.
1533 * Returns -1 if `thread` is NULL.
1536 mono_thread_get_managed_id (MonoThread *thread)
1541 MonoInternalThread *internal = thread->internal_thread;
1542 if (internal == NULL)
1545 int32_t id = internal->managed_id;
1551 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1556 mono_error_init (&error);
1558 LOCK_THREAD (this_obj);
1560 if (!this_obj->name)
1563 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1565 UNLOCK_THREAD (this_obj);
1567 if (mono_error_set_pending_exception (&error))
1574 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1576 LOCK_THREAD (this_obj);
1578 mono_error_init (error);
1580 if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1581 UNLOCK_THREAD (this_obj);
1583 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1586 if (this_obj->name) {
1587 g_free (this_obj->name);
1588 this_obj->name_len = 0;
1591 this_obj->name = g_new (gunichar2, mono_string_length (name));
1592 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1593 this_obj->name_len = mono_string_length (name);
1596 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1599 this_obj->name = NULL;
1602 UNLOCK_THREAD (this_obj);
1604 if (this_obj->name && this_obj->tid) {
1605 char *tname = mono_string_to_utf8_checked (name, error);
1606 return_if_nok (error);
1607 mono_profiler_thread_name (this_obj->tid, tname);
1608 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1614 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1617 mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1618 mono_error_set_pending_exception (&error);
1622 * ves_icall_System_Threading_Thread_GetPriority_internal:
1623 * @param this_obj: The MonoInternalThread on which to operate.
1625 * Gets the priority of the given thread.
1626 * @return: The priority of the given thread.
1629 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1632 MonoInternalThread *internal = this_obj->internal_thread;
1634 LOCK_THREAD (internal);
1635 priority = internal->priority;
1636 UNLOCK_THREAD (internal);
1642 * ves_icall_System_Threading_Thread_SetPriority_internal:
1643 * @param this_obj: The MonoInternalThread on which to operate.
1644 * @param priority: The priority to set.
1646 * Sets the priority of the given thread.
1649 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1651 MonoInternalThread *internal = this_obj->internal_thread;
1653 LOCK_THREAD (internal);
1654 internal->priority = priority;
1655 if (internal->thread_info != NULL)
1656 mono_thread_internal_set_priority (internal, priority);
1657 UNLOCK_THREAD (internal);
1660 /* If the array is already in the requested domain, we just return it,
1661 otherwise we return a copy in that domain. */
1663 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1667 mono_error_init (error);
1671 if (mono_object_domain (arr) == domain)
1674 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1675 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1680 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1683 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1684 mono_error_set_pending_exception (&error);
1689 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1692 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1693 mono_error_set_pending_exception (&error);
1698 mono_thread_current (void)
1700 MonoDomain *domain = mono_domain_get ();
1701 MonoInternalThread *internal = mono_thread_internal_current ();
1702 MonoThread **current_thread_ptr;
1704 g_assert (internal);
1705 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1707 if (!*current_thread_ptr) {
1708 g_assert (domain != mono_get_root_domain ());
1709 *current_thread_ptr = create_thread_object (domain, internal);
1711 return *current_thread_ptr;
1714 /* Return the thread object belonging to INTERNAL in the current domain */
1716 mono_thread_current_for_thread (MonoInternalThread *internal)
1718 MonoDomain *domain = mono_domain_get ();
1719 MonoThread **current_thread_ptr;
1721 g_assert (internal);
1722 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1724 if (!*current_thread_ptr) {
1725 g_assert (domain != mono_get_root_domain ());
1726 *current_thread_ptr = create_thread_object (domain, internal);
1728 return *current_thread_ptr;
1732 mono_thread_internal_current (void)
1734 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1735 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1739 static MonoThreadInfoWaitRet
1740 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1743 MonoThreadInfoWaitRet ret;
1748 mono_error_init (error);
1750 start = (ms == -1) ? 0 : mono_msec_ticks ();
1753 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1756 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1759 exc = mono_thread_execute_interruption ();
1761 mono_error_set_exception_instance (error, exc);
1768 /* Re-calculate ms according to the time passed */
1769 diff_ms = (gint32)(mono_msec_ticks () - start);
1770 if (diff_ms >= ms) {
1771 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1774 wait = ms - diff_ms;
1781 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1783 MonoInternalThread *thread = this_obj->internal_thread;
1784 MonoThreadHandle *handle = thread->handle;
1785 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1789 if (mono_thread_current_check_pending_interrupt ())
1792 LOCK_THREAD (thread);
1794 if ((thread->state & ThreadState_Unstarted) != 0) {
1795 UNLOCK_THREAD (thread);
1797 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1801 UNLOCK_THREAD (thread);
1804 ms=MONO_INFINITE_WAIT;
1806 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1808 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1810 ret=mono_join_uninterrupted (handle, ms, &error);
1812 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1814 mono_error_set_pending_exception (&error);
1816 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1817 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1822 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1827 #define MANAGED_WAIT_FAILED 0x7fffffff
1830 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1832 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1833 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1834 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1835 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1836 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1837 return WAIT_IO_COMPLETION;
1838 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1839 return WAIT_TIMEOUT;
1840 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1841 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1842 return MANAGED_WAIT_FAILED;
1844 g_error ("%s: unknown val value %d", __func__, val);
1848 static MonoW32HandleWaitRet
1849 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1852 MonoW32HandleWaitRet ret;
1857 mono_error_init (error);
1859 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1863 if (numhandles != 1)
1864 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1866 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1868 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1869 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1870 #endif /* HOST_WIN32 */
1873 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1876 exc = mono_thread_execute_interruption ();
1878 mono_error_set_exception_instance (error, exc);
1885 /* Re-calculate ms according to the time passed */
1886 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1887 if (diff_ms >= ms) {
1888 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1891 wait = ms - diff_ms;
1897 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1902 MonoW32HandleWaitRet ret;
1904 MonoObject *waitHandle;
1905 MonoInternalThread *thread = mono_thread_internal_current ();
1907 /* Do this WaitSleepJoin check before creating objects */
1908 if (mono_thread_current_check_pending_interrupt ())
1909 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1911 /* We fail in managed if the array has more than 64 elements */
1912 numhandles = (guint32)mono_array_length(mono_handles);
1913 handles = g_new0(HANDLE, numhandles);
1915 for(i = 0; i < numhandles; i++) {
1916 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1917 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1921 ms=MONO_INFINITE_WAIT;
1924 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1926 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1928 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1932 mono_error_set_pending_exception (&error);
1934 return map_native_wait_result_to_managed (ret, numhandles);
1937 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1940 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1941 uintptr_t numhandles;
1942 MonoW32HandleWaitRet ret;
1944 MonoObject *waitHandle;
1945 MonoInternalThread *thread = mono_thread_internal_current ();
1947 /* Do this WaitSleepJoin check before creating objects */
1948 if (mono_thread_current_check_pending_interrupt ())
1949 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1951 numhandles = mono_array_length(mono_handles);
1952 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1953 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1955 for(i = 0; i < numhandles; i++) {
1956 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1957 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1961 ms=MONO_INFINITE_WAIT;
1964 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1966 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1968 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1970 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1972 mono_error_set_pending_exception (&error);
1974 return map_native_wait_result_to_managed (ret, numhandles);
1977 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1980 MonoW32HandleWaitRet ret;
1981 MonoInternalThread *thread = mono_thread_internal_current ();
1983 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1986 ms=MONO_INFINITE_WAIT;
1989 if (mono_thread_current_check_pending_interrupt ())
1990 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1992 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1994 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1996 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1998 mono_error_set_pending_exception (&error);
1999 return map_native_wait_result_to_managed (ret, 1);
2003 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
2005 MonoW32HandleWaitRet ret;
2006 MonoInternalThread *thread = mono_thread_internal_current ();
2009 ms = MONO_INFINITE_WAIT;
2011 if (mono_thread_current_check_pending_interrupt ())
2012 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2014 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2018 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2020 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2024 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2026 return map_native_wait_result_to_managed (ret, 1);
2029 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2031 return InterlockedIncrement (location);
2034 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2036 #if SIZEOF_VOID_P == 4
2037 if (G_UNLIKELY ((size_t)location & 0x7)) {
2039 mono_interlocked_lock ();
2042 mono_interlocked_unlock ();
2046 return InterlockedIncrement64 (location);
2049 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2051 return InterlockedDecrement(location);
2054 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2056 #if SIZEOF_VOID_P == 4
2057 if (G_UNLIKELY ((size_t)location & 0x7)) {
2059 mono_interlocked_lock ();
2062 mono_interlocked_unlock ();
2066 return InterlockedDecrement64 (location);
2069 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2071 return InterlockedExchange(location, value);
2074 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2077 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2078 mono_gc_wbarrier_generic_nostore (location);
2082 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2084 return InterlockedExchangePointer(location, value);
2087 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2089 IntFloatUnion val, ret;
2092 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2098 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2100 #if SIZEOF_VOID_P == 4
2101 if (G_UNLIKELY ((size_t)location & 0x7)) {
2103 mono_interlocked_lock ();
2106 mono_interlocked_unlock ();
2110 return InterlockedExchange64 (location, value);
2114 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2116 LongDoubleUnion val, ret;
2119 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2124 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2126 return InterlockedCompareExchange(location, value, comparand);
2129 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2131 gint32 r = InterlockedCompareExchange(location, value, comparand);
2132 *success = r == comparand;
2136 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2139 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2140 mono_gc_wbarrier_generic_nostore (location);
2144 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2146 return InterlockedCompareExchangePointer(location, value, comparand);
2149 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2151 IntFloatUnion val, ret, cmp;
2154 cmp.fval = comparand;
2155 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2161 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2163 #if SIZEOF_VOID_P == 8
2164 LongDoubleUnion val, comp, ret;
2167 comp.fval = comparand;
2168 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2174 mono_interlocked_lock ();
2176 if (old == comparand)
2178 mono_interlocked_unlock ();
2185 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2187 #if SIZEOF_VOID_P == 4
2188 if (G_UNLIKELY ((size_t)location & 0x7)) {
2190 mono_interlocked_lock ();
2192 if (old == comparand)
2194 mono_interlocked_unlock ();
2198 return InterlockedCompareExchange64 (location, value, comparand);
2202 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2205 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2206 mono_gc_wbarrier_generic_nostore (location);
2211 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2214 MONO_CHECK_NULL (location, NULL);
2215 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2216 mono_gc_wbarrier_generic_nostore (location);
2221 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2223 return InterlockedAdd (location, value);
2227 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2229 #if SIZEOF_VOID_P == 4
2230 if (G_UNLIKELY ((size_t)location & 0x7)) {
2232 mono_interlocked_lock ();
2235 mono_interlocked_unlock ();
2239 return InterlockedAdd64 (location, value);
2243 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2245 #if SIZEOF_VOID_P == 4
2246 if (G_UNLIKELY ((size_t)location & 0x7)) {
2248 mono_interlocked_lock ();
2250 mono_interlocked_unlock ();
2254 return InterlockedRead64 (location);
2258 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2260 mono_memory_barrier ();
2264 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2266 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2268 if (state & ThreadState_Background) {
2269 /* If the thread changes the background mode, the main thread has to
2270 * be notified, since it has to rebuild the list of threads to
2273 mono_os_event_set (&background_change_event);
2278 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2280 mono_thread_set_state (this_obj, (MonoThreadState)state);
2282 if (state & ThreadState_Background) {
2283 /* If the thread changes the background mode, the main thread has to
2284 * be notified, since it has to rebuild the list of threads to
2287 mono_os_event_set (&background_change_event);
2292 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2296 LOCK_THREAD (this_obj);
2298 state = this_obj->state;
2300 UNLOCK_THREAD (this_obj);
2305 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2307 MonoInternalThread *current;
2309 MonoInternalThread *thread = this_obj->internal_thread;
2311 LOCK_THREAD (thread);
2313 current = mono_thread_internal_current ();
2315 thread->thread_interrupt_requested = TRUE;
2316 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2318 UNLOCK_THREAD (thread);
2321 async_abort_internal (thread, FALSE);
2326 * mono_thread_current_check_pending_interrupt:
2328 * Checks if there's a interruption request and set the pending exception if so.
2330 * @returns true if a pending exception was set
2333 mono_thread_current_check_pending_interrupt (void)
2335 MonoInternalThread *thread = mono_thread_internal_current ();
2336 gboolean throw_ = FALSE;
2338 LOCK_THREAD (thread);
2340 if (thread->thread_interrupt_requested) {
2342 thread->thread_interrupt_requested = FALSE;
2345 UNLOCK_THREAD (thread);
2348 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2353 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2355 LOCK_THREAD (thread);
2357 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2358 (thread->state & ThreadState_StopRequested) != 0 ||
2359 (thread->state & ThreadState_Stopped) != 0)
2361 UNLOCK_THREAD (thread);
2365 if ((thread->state & ThreadState_Unstarted) != 0) {
2366 thread->state |= ThreadState_Aborted;
2367 UNLOCK_THREAD (thread);
2371 thread->state |= ThreadState_AbortRequested;
2372 if (thread->abort_state_handle)
2373 mono_gchandle_free (thread->abort_state_handle);
2375 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2376 g_assert (thread->abort_state_handle);
2378 thread->abort_state_handle = 0;
2380 thread->abort_exc = NULL;
2382 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));
2384 /* During shutdown, we can't wait for other threads */
2386 /* Make sure the thread is awake */
2387 mono_thread_resume (thread);
2389 UNLOCK_THREAD (thread);
2394 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2396 if (!request_thread_abort (thread, state))
2399 if (thread == mono_thread_internal_current ()) {
2401 self_abort_internal (&error);
2402 mono_error_set_pending_exception (&error);
2404 async_abort_internal (thread, TRUE);
2409 * mono_thread_internal_abort:
2411 * Request thread @thread to be aborted.
2413 * @thread MUST NOT be the current thread.
2416 mono_thread_internal_abort (MonoInternalThread *thread)
2418 g_assert (thread != mono_thread_internal_current ());
2420 if (!request_thread_abort (thread, NULL))
2422 async_abort_internal (thread, TRUE);
2426 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2428 MonoInternalThread *thread = mono_thread_internal_current ();
2429 gboolean was_aborting;
2431 LOCK_THREAD (thread);
2432 was_aborting = thread->state & ThreadState_AbortRequested;
2433 thread->state &= ~ThreadState_AbortRequested;
2434 UNLOCK_THREAD (thread);
2436 if (!was_aborting) {
2437 const char *msg = "Unable to reset abort because no abort was requested";
2438 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2442 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2443 thread->abort_exc = NULL;
2444 if (thread->abort_state_handle) {
2445 mono_gchandle_free (thread->abort_state_handle);
2446 /* This is actually not necessary - the handle
2447 only counts if the exception is set */
2448 thread->abort_state_handle = 0;
2453 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2455 LOCK_THREAD (thread);
2457 thread->state &= ~ThreadState_AbortRequested;
2459 if (thread->abort_exc) {
2460 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2461 thread->abort_exc = NULL;
2462 if (thread->abort_state_handle) {
2463 mono_gchandle_free (thread->abort_state_handle);
2464 /* This is actually not necessary - the handle
2465 only counts if the exception is set */
2466 thread->abort_state_handle = 0;
2470 UNLOCK_THREAD (thread);
2474 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2477 MonoInternalThread *thread = this_obj->internal_thread;
2478 MonoObject *state, *deserialized = NULL;
2481 if (!thread->abort_state_handle)
2484 state = mono_gchandle_get_target (thread->abort_state_handle);
2487 domain = mono_domain_get ();
2488 if (mono_object_domain (state) == domain)
2491 deserialized = mono_object_xdomain_representation (state, domain, &error);
2493 if (!deserialized) {
2494 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2495 if (!is_ok (&error)) {
2496 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2497 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2499 mono_set_pending_exception (invalid_op_exc);
2503 return deserialized;
2507 mono_thread_suspend (MonoInternalThread *thread)
2509 LOCK_THREAD (thread);
2511 if ((thread->state & ThreadState_Unstarted) != 0 ||
2512 (thread->state & ThreadState_Aborted) != 0 ||
2513 (thread->state & ThreadState_Stopped) != 0)
2515 UNLOCK_THREAD (thread);
2519 if ((thread->state & ThreadState_Suspended) != 0 ||
2520 (thread->state & ThreadState_SuspendRequested) != 0 ||
2521 (thread->state & ThreadState_StopRequested) != 0)
2523 UNLOCK_THREAD (thread);
2527 thread->state |= ThreadState_SuspendRequested;
2528 mono_os_event_reset (thread->suspended);
2530 if (thread == mono_thread_internal_current ()) {
2531 /* calls UNLOCK_THREAD (thread) */
2532 self_suspend_internal ();
2534 /* calls UNLOCK_THREAD (thread) */
2535 async_suspend_internal (thread, FALSE);
2542 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2544 if (!mono_thread_suspend (this_obj->internal_thread)) {
2545 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2550 /* LOCKING: LOCK_THREAD(thread) must be held */
2552 mono_thread_resume (MonoInternalThread *thread)
2554 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2555 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2556 thread->state &= ~ThreadState_SuspendRequested;
2557 mono_os_event_set (thread->suspended);
2561 if ((thread->state & ThreadState_Suspended) == 0 ||
2562 (thread->state & ThreadState_Unstarted) != 0 ||
2563 (thread->state & ThreadState_Aborted) != 0 ||
2564 (thread->state & ThreadState_Stopped) != 0)
2566 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2570 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2572 mono_os_event_set (thread->suspended);
2574 if (!thread->self_suspended) {
2575 UNLOCK_THREAD (thread);
2577 /* Awake the thread */
2578 if (!mono_thread_info_resume (thread_get_tid (thread)))
2581 LOCK_THREAD (thread);
2584 thread->state &= ~ThreadState_Suspended;
2590 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2592 if (!thread->internal_thread) {
2593 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2595 LOCK_THREAD (thread->internal_thread);
2596 if (!mono_thread_resume (thread->internal_thread))
2597 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2598 UNLOCK_THREAD (thread->internal_thread);
2603 mono_threads_is_critical_method (MonoMethod *method)
2605 switch (method->wrapper_type) {
2606 case MONO_WRAPPER_RUNTIME_INVOKE:
2607 case MONO_WRAPPER_XDOMAIN_INVOKE:
2608 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2615 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2620 if (mono_threads_is_critical_method (m)) {
2621 *((gboolean*)data) = TRUE;
2628 is_running_protected_wrapper (void)
2630 gboolean found = FALSE;
2631 mono_stack_walk (find_wrapper, &found);
2636 request_thread_stop (MonoInternalThread *thread)
2638 LOCK_THREAD (thread);
2640 if ((thread->state & ThreadState_StopRequested) != 0 ||
2641 (thread->state & ThreadState_Stopped) != 0)
2643 UNLOCK_THREAD (thread);
2647 /* Make sure the thread is awake */
2648 mono_thread_resume (thread);
2650 thread->state |= ThreadState_StopRequested;
2651 thread->state &= ~ThreadState_AbortRequested;
2653 UNLOCK_THREAD (thread);
2658 * mono_thread_internal_stop:
2660 * Request thread @thread to stop.
2662 * @thread MUST NOT be the current thread.
2665 mono_thread_internal_stop (MonoInternalThread *thread)
2667 g_assert (thread != mono_thread_internal_current ());
2669 if (!request_thread_stop (thread))
2672 async_abort_internal (thread, TRUE);
2675 void mono_thread_stop (MonoThread *thread)
2677 MonoInternalThread *internal = thread->internal_thread;
2679 if (!request_thread_stop (internal))
2682 if (internal == mono_thread_internal_current ()) {
2684 self_abort_internal (&error);
2686 This function is part of the embeding API and has no way to return the exception
2687 to be thrown. So what we do is keep the old behavior and raise the exception.
2689 mono_error_raise_exception (&error); /* OK to throw, see note */
2691 async_abort_internal (internal, TRUE);
2696 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2698 gint8 tmp = *(volatile gint8 *)ptr;
2699 mono_memory_barrier ();
2704 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2706 gint16 tmp = *(volatile gint16 *)ptr;
2707 mono_memory_barrier ();
2712 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2714 gint32 tmp = *(volatile gint32 *)ptr;
2715 mono_memory_barrier ();
2720 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2722 gint64 tmp = *(volatile gint64 *)ptr;
2723 mono_memory_barrier ();
2728 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2730 volatile void *tmp = *(volatile void **)ptr;
2731 mono_memory_barrier ();
2732 return (void *) tmp;
2736 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2738 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2739 mono_memory_barrier ();
2740 return (MonoObject *) tmp;
2744 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2746 double tmp = *(volatile double *)ptr;
2747 mono_memory_barrier ();
2752 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2754 float tmp = *(volatile float *)ptr;
2755 mono_memory_barrier ();
2760 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2762 return InterlockedRead8 ((volatile gint8 *)ptr);
2766 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2768 return InterlockedRead16 ((volatile gint16 *)ptr);
2772 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2774 return InterlockedRead ((volatile gint32 *)ptr);
2778 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2780 #if SIZEOF_VOID_P == 4
2781 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2783 mono_interlocked_lock ();
2784 val = *(gint64*)ptr;
2785 mono_interlocked_unlock ();
2789 return InterlockedRead64 ((volatile gint64 *)ptr);
2793 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2795 return InterlockedReadPointer ((volatile gpointer *)ptr);
2799 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2803 #if SIZEOF_VOID_P == 4
2804 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2806 mono_interlocked_lock ();
2807 val = *(double*)ptr;
2808 mono_interlocked_unlock ();
2813 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2819 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2823 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2829 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2831 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2835 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2837 mono_memory_barrier ();
2838 *(volatile gint8 *)ptr = value;
2842 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2844 mono_memory_barrier ();
2845 *(volatile gint16 *)ptr = value;
2849 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2851 mono_memory_barrier ();
2852 *(volatile gint32 *)ptr = value;
2856 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2858 mono_memory_barrier ();
2859 *(volatile gint64 *)ptr = value;
2863 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2865 mono_memory_barrier ();
2866 *(volatile void **)ptr = value;
2870 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2872 mono_memory_barrier ();
2873 mono_gc_wbarrier_generic_store (ptr, value);
2877 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2879 mono_memory_barrier ();
2880 *(volatile double *)ptr = value;
2884 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2886 mono_memory_barrier ();
2887 *(volatile float *)ptr = value;
2891 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2893 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2897 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2899 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2903 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2905 InterlockedWrite ((volatile gint32 *)ptr, value);
2909 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2911 #if SIZEOF_VOID_P == 4
2912 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2913 mono_interlocked_lock ();
2914 *(gint64*)ptr = value;
2915 mono_interlocked_unlock ();
2920 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2924 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2926 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2930 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2934 #if SIZEOF_VOID_P == 4
2935 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2936 mono_interlocked_lock ();
2937 *(double*)ptr = value;
2938 mono_interlocked_unlock ();
2945 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2949 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2955 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2959 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2961 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2965 free_context (void *user_data)
2967 ContextStaticData *data = user_data;
2969 mono_threads_lock ();
2972 * There is no guarantee that, by the point this reference queue callback
2973 * has been invoked, the GC handle associated with the object will fail to
2974 * resolve as one might expect. So if we don't free and remove the GC
2975 * handle here, free_context_static_data_helper () could end up resolving
2976 * a GC handle to an actually-dead context which would contain a pointer
2977 * to an already-freed static data segment, resulting in a crash when
2980 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2982 mono_threads_unlock ();
2984 mono_gchandle_free (data->gc_handle);
2985 mono_free_static_data (data->static_data);
2990 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2992 mono_threads_lock ();
2994 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2997 contexts = g_hash_table_new (NULL, NULL);
3000 context_queue = mono_gc_reference_queue_new (free_context);
3002 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
3003 g_hash_table_insert (contexts, gch, gch);
3006 * We use this intermediate structure to contain a duplicate pointer to
3007 * the static data because we can't rely on being able to resolve the GC
3008 * handle in the reference queue callback.
3010 ContextStaticData *data = g_new0 (ContextStaticData, 1);
3011 data->gc_handle = GPOINTER_TO_UINT (gch);
3014 context_adjust_static_data (ctx);
3015 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
3017 mono_threads_unlock ();
3019 mono_profiler_context_loaded (ctx);
3023 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
3026 * NOTE: Since finalizers are unreliable for the purposes of ensuring
3027 * cleanup in exceptional circumstances, we don't actually do any
3028 * cleanup work here. We instead do this via a reference queue.
3031 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
3033 mono_profiler_context_unloaded (ctx);
3036 void mono_thread_init (MonoThreadStartCB start_cb,
3037 MonoThreadAttachCB attach_cb)
3039 mono_coop_mutex_init_recursive (&threads_mutex);
3041 mono_os_mutex_init_recursive(&interlocked_mutex);
3042 mono_os_mutex_init_recursive(&joinable_threads_mutex);
3044 mono_os_event_init (&background_change_event, FALSE);
3046 mono_init_static_data_info (&thread_static_info);
3047 mono_init_static_data_info (&context_static_info);
3049 mono_thread_start_cb = start_cb;
3050 mono_thread_attach_cb = attach_cb;
3053 void mono_thread_cleanup (void)
3055 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3056 /* The main thread must abandon any held mutexes (particularly
3057 * important for named mutexes as they are shared across
3058 * processes, see bug 74680.) This will happen when the
3059 * thread exits, but if it's not running in a subthread it
3060 * won't exit in time.
3062 mono_w32mutex_abandon ();
3066 /* This stuff needs more testing, it seems one of these
3067 * critical sections can be locked when mono_thread_cleanup is
3070 mono_coop_mutex_destroy (&threads_mutex);
3071 mono_os_mutex_destroy (&interlocked_mutex);
3072 mono_os_mutex_destroy (&delayed_free_table_mutex);
3073 mono_os_mutex_destroy (&small_id_mutex);
3074 mono_os_event_destroy (&background_change_event);
3079 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3081 mono_thread_cleanup_fn = func;
3085 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3087 thread->internal_thread->manage_callback = func;
3091 static void print_tids (gpointer key, gpointer value, gpointer user)
3093 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3094 * sizeof(uint) and a cast to uint would overflow
3096 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3097 * print this as a pointer.
3099 g_message ("Waiting for: %p", key);
3104 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3105 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3110 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3113 MonoThreadInfoWaitRet ret;
3115 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3117 /* Add the thread state change event, so it wakes
3118 * up if a thread changes to background mode. */
3121 if (check_state_change)
3122 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3124 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3127 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3128 /* See the comment in build_wait_tids() */
3129 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3133 for( i = 0; i < wait->num; i++)
3134 mono_threads_close_thread_handle (wait->handles [i]);
3136 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3139 if (ret < wait->num) {
3140 MonoInternalThread *internal;
3142 internal = wait->threads [ret];
3144 mono_threads_lock ();
3145 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3146 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3147 mono_threads_unlock ();
3151 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3153 struct wait_data *wait=(struct wait_data *)user;
3155 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3156 MonoInternalThread *thread=(MonoInternalThread *)value;
3158 /* Ignore background threads, we abort them later */
3159 /* Do not lock here since it is not needed and the caller holds threads_lock */
3160 if (thread->state & ThreadState_Background) {
3161 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3162 return; /* just leave, ignore */
3165 if (mono_gc_is_finalizer_internal_thread (thread)) {
3166 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3170 if (thread == mono_thread_internal_current ()) {
3171 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3175 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3176 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3180 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3181 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3185 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3186 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3187 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3188 wait->threads[wait->num]=thread;
3191 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3193 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3198 /* Just ignore the rest, we can't do anything with
3205 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3207 struct wait_data *wait=(struct wait_data *)user;
3208 MonoNativeThreadId self = mono_native_thread_id_get ();
3209 MonoInternalThread *thread = (MonoInternalThread *)value;
3211 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3214 /* The finalizer thread is not a background thread */
3215 if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3216 && (thread->state & ThreadState_Background) != 0
3217 && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3219 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3220 wait->threads[wait->num] = thread;
3223 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3224 mono_thread_internal_abort (thread);
3228 return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3229 && !mono_gc_is_finalizer_internal_thread (thread);
3233 * mono_threads_set_shutting_down:
3235 * Is called by a thread that wants to shut down Mono. If the runtime is already
3236 * shutting down, the calling thread is suspended/stopped, and this function never
3240 mono_threads_set_shutting_down (void)
3242 MonoInternalThread *current_thread = mono_thread_internal_current ();
3244 mono_threads_lock ();
3246 if (shutting_down) {
3247 mono_threads_unlock ();
3249 /* Make sure we're properly suspended/stopped */
3251 LOCK_THREAD (current_thread);
3253 if ((current_thread->state & ThreadState_SuspendRequested) ||
3254 (current_thread->state & ThreadState_AbortRequested) ||
3255 (current_thread->state & ThreadState_StopRequested)) {
3256 UNLOCK_THREAD (current_thread);
3257 mono_thread_execute_interruption ();
3259 current_thread->state |= ThreadState_Stopped;
3260 UNLOCK_THREAD (current_thread);
3263 /*since we're killing the thread, detach it.*/
3264 mono_thread_detach_internal (current_thread);
3266 /* Wake up other threads potentially waiting for us */
3267 mono_thread_info_exit (0);
3269 shutting_down = TRUE;
3271 /* Not really a background state change, but this will
3272 * interrupt the main thread if it is waiting for all
3273 * the other threads.
3275 mono_os_event_set (&background_change_event);
3277 mono_threads_unlock ();
3281 void mono_thread_manage (void)
3283 struct wait_data wait_data;
3284 struct wait_data *wait = &wait_data;
3286 memset (wait, 0, sizeof (struct wait_data));
3287 /* join each thread that's still running */
3288 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3290 mono_threads_lock ();
3292 THREAD_DEBUG (g_message("%s: No threads", __func__));
3293 mono_threads_unlock ();
3296 mono_threads_unlock ();
3299 mono_threads_lock ();
3300 if (shutting_down) {
3301 /* somebody else is shutting down */
3302 mono_threads_unlock ();
3305 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3306 mono_g_hash_table_foreach (threads, print_tids, NULL));
3308 mono_os_event_reset (&background_change_event);
3310 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3311 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3312 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3313 mono_threads_unlock ();
3315 /* Something to wait for */
3316 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3317 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3318 } while(wait->num>0);
3320 /* Mono is shutting down, so just wait for the end */
3321 if (!mono_runtime_try_shutdown ()) {
3322 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3323 mono_thread_suspend (mono_thread_internal_current ());
3324 mono_thread_execute_interruption ();
3328 * Remove everything but the finalizer thread and self.
3329 * Also abort all the background threads
3332 mono_threads_lock ();
3335 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3336 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3337 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3339 mono_threads_unlock ();
3341 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3342 if (wait->num > 0) {
3343 /* Something to wait for */
3344 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3346 } while (wait->num > 0);
3349 * give the subthreads a chance to really quit (this is mainly needed
3350 * to get correct user and system times from getrusage/wait/time(1)).
3351 * This could be removed if we avoid pthread_detach() and use pthread_join().
3353 mono_thread_info_yield ();
3357 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3359 MonoInternalThread *thread = (MonoInternalThread*)value;
3360 struct wait_data *wait = (struct wait_data*)user_data;
3363 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3365 * This needs no locking.
3367 if ((thread->state & ThreadState_Suspended) != 0 ||
3368 (thread->state & ThreadState_Stopped) != 0)
3371 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3372 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3373 wait->threads [wait->num] = thread;
3379 * mono_thread_suspend_all_other_threads:
3381 * Suspend all managed threads except the finalizer thread and this thread. It is
3382 * not possible to resume them later.
3384 void mono_thread_suspend_all_other_threads (void)
3386 struct wait_data wait_data;
3387 struct wait_data *wait = &wait_data;
3389 MonoNativeThreadId self = mono_native_thread_id_get ();
3390 guint32 eventidx = 0;
3391 gboolean starting, finished;
3393 memset (wait, 0, sizeof (struct wait_data));
3395 * The other threads could be in an arbitrary state at this point, i.e.
3396 * they could be starting up, shutting down etc. This means that there could be
3397 * threads which are not even in the threads hash table yet.
3401 * First we set a barrier which will be checked by all threads before they
3402 * are added to the threads hash table, and they will exit if the flag is set.
3403 * This ensures that no threads could be added to the hash later.
3404 * We will use shutting_down as the barrier for now.
3406 g_assert (shutting_down);
3409 * We make multiple calls to WaitForMultipleObjects since:
3410 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3411 * - some threads could exit without becoming suspended
3416 * Make a copy of the hashtable since we can't do anything with
3417 * threads while threads_mutex is held.
3420 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3421 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3422 mono_threads_lock ();
3423 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3424 mono_threads_unlock ();
3427 /* Get the suspended events that we'll be waiting for */
3428 for (i = 0; i < wait->num; ++i) {
3429 MonoInternalThread *thread = wait->threads [i];
3431 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3432 || mono_gc_is_finalizer_internal_thread (thread)
3433 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3435 mono_threads_close_thread_handle (wait->handles [i]);
3436 wait->threads [i] = NULL;
3440 LOCK_THREAD (thread);
3442 if ((thread->state & ThreadState_Suspended) != 0 ||
3443 (thread->state & ThreadState_StopRequested) != 0 ||
3444 (thread->state & ThreadState_Stopped) != 0) {
3445 UNLOCK_THREAD (thread);
3446 mono_threads_close_thread_handle (wait->handles [i]);
3447 wait->threads [i] = NULL;
3453 /* Convert abort requests into suspend requests */
3454 if ((thread->state & ThreadState_AbortRequested) != 0)
3455 thread->state &= ~ThreadState_AbortRequested;
3457 thread->state |= ThreadState_SuspendRequested;
3458 mono_os_event_reset (thread->suspended);
3460 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3461 async_suspend_internal (thread, TRUE);
3463 mono_threads_close_thread_handle (wait->handles [i]);
3464 wait->threads [i] = NULL;
3466 if (eventidx <= 0) {
3468 * If there are threads which are starting up, we wait until they
3469 * are suspended when they try to register in the threads hash.
3470 * This is guaranteed to finish, since the threads which can create new
3471 * threads get suspended after a while.
3472 * FIXME: The finalizer thread can still create new threads.
3474 mono_threads_lock ();
3475 if (threads_starting_up)
3476 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3479 mono_threads_unlock ();
3481 mono_thread_info_sleep (100, NULL);
3489 MonoInternalThread *thread;
3490 MonoStackFrameInfo *frames;
3491 int nframes, max_frames;
3492 int nthreads, max_threads;
3493 MonoInternalThread **threads;
3494 } ThreadDumpUserData;
3496 static gboolean thread_dump_requested;
3498 /* This needs to be async safe */
3500 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3502 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3504 if (ud->nframes < ud->max_frames) {
3505 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3512 /* This needs to be async safe */
3513 static SuspendThreadResult
3514 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3516 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3517 MonoInternalThread *thread = user_data->thread;
3520 /* This no longer works with remote unwinding */
3521 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3522 mono_thread_internal_describe (thread, text);
3523 g_string_append (text, "\n");
3526 if (thread == mono_thread_internal_current ())
3527 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3529 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3531 return MonoResumeThread;
3535 int nthreads, max_threads;
3536 MonoInternalThread **threads;
3537 } CollectThreadsUserData;
3540 collect_thread (gpointer key, gpointer value, gpointer user)
3542 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3543 MonoInternalThread *thread = (MonoInternalThread *)value;
3545 if (ud->nthreads < ud->max_threads)
3546 ud->threads [ud->nthreads ++] = thread;
3550 * Collect running threads into the THREADS array.
3551 * THREADS should be an array allocated on the stack.
3554 collect_threads (MonoInternalThread **thread_array, int max_threads)
3556 CollectThreadsUserData ud;
3558 memset (&ud, 0, sizeof (ud));
3559 /* This array contains refs, but its on the stack, so its ok */
3560 ud.threads = thread_array;
3561 ud.max_threads = max_threads;
3563 mono_threads_lock ();
3564 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3565 mono_threads_unlock ();
3571 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3573 GString* text = g_string_new (0);
3575 GError *error = NULL;
3578 ud->thread = thread;
3581 /* Collect frames for the thread */
3582 if (thread == mono_thread_internal_current ()) {
3583 get_thread_dump (mono_thread_info_current (), ud);
3585 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3589 * Do all the non async-safe work outside of get_thread_dump.
3592 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3594 g_string_append_printf (text, "\n\"%s\"", name);
3597 else if (thread->threadpool_thread) {
3598 g_string_append (text, "\n\"<threadpool thread>\"");
3600 g_string_append (text, "\n\"<unnamed thread>\"");
3603 for (i = 0; i < ud->nframes; ++i) {
3604 MonoStackFrameInfo *frame = &ud->frames [i];
3605 MonoMethod *method = NULL;
3607 if (frame->type == FRAME_TYPE_MANAGED)
3608 method = mono_jit_info_get_method (frame->ji);
3611 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3612 g_string_append_printf (text, " %s\n", location);
3615 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3619 fprintf (stdout, "%s", text->str);
3621 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3622 OutputDebugStringA(text->str);
3625 g_string_free (text, TRUE);
3630 mono_threads_perform_thread_dump (void)
3632 ThreadDumpUserData ud;
3633 MonoInternalThread *thread_array [128];
3634 int tindex, nthreads;
3636 if (!thread_dump_requested)
3639 printf ("Full thread dump:\n");
3641 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3642 nthreads = collect_threads (thread_array, 128);
3644 memset (&ud, 0, sizeof (ud));
3645 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3646 ud.max_frames = 256;
3648 for (tindex = 0; tindex < nthreads; ++tindex)
3649 dump_thread (thread_array [tindex], &ud);
3653 thread_dump_requested = FALSE;
3656 /* Obtain the thread dump of all threads */
3658 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3661 ThreadDumpUserData ud;
3662 MonoInternalThread *thread_array [128];
3663 MonoDomain *domain = mono_domain_get ();
3664 MonoDebugSourceLocation *location;
3665 int tindex, nthreads;
3667 mono_error_init (error);
3669 *out_threads = NULL;
3670 *out_stack_frames = NULL;
3672 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3673 nthreads = collect_threads (thread_array, 128);
3675 memset (&ud, 0, sizeof (ud));
3676 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3677 ud.max_frames = 256;
3679 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3682 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3686 for (tindex = 0; tindex < nthreads; ++tindex) {
3687 MonoInternalThread *thread = thread_array [tindex];
3688 MonoArray *thread_frames;
3694 /* Collect frames for the thread */
3695 if (thread == mono_thread_internal_current ()) {
3696 get_thread_dump (mono_thread_info_current (), &ud);
3698 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3701 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3703 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3706 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3708 for (i = 0; i < ud.nframes; ++i) {
3709 MonoStackFrameInfo *frame = &ud.frames [i];
3710 MonoMethod *method = NULL;
3711 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3715 sf->native_offset = frame->native_offset;
3717 if (frame->type == FRAME_TYPE_MANAGED)
3718 method = mono_jit_info_get_method (frame->ji);
3721 sf->method_address = (gsize) frame->ji->code_start;
3723 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3726 MONO_OBJECT_SETREF (sf, method, rm);
3728 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3730 sf->il_offset = location->il_offset;
3732 if (location && location->source_file) {
3733 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3734 sf->line = location->row;
3735 sf->column = location->column;
3737 mono_debug_free_source_location (location);
3742 mono_array_setref (thread_frames, i, sf);
3748 return is_ok (error);
3752 * mono_threads_request_thread_dump:
3754 * Ask all threads except the current to print their stacktrace to stdout.
3757 mono_threads_request_thread_dump (void)
3759 /*The new thread dump code runs out of the finalizer thread. */
3760 thread_dump_requested = TRUE;
3761 mono_gc_finalize_notify ();
3766 gint allocated; /* +1 so that refs [allocated] == NULL */
3770 typedef struct ref_stack RefStack;
3773 ref_stack_new (gint initial_size)
3777 initial_size = MAX (initial_size, 16) + 1;
3778 rs = g_new0 (RefStack, 1);
3779 rs->refs = g_new0 (gpointer, initial_size);
3780 rs->allocated = initial_size;
3785 ref_stack_destroy (gpointer ptr)
3787 RefStack *rs = (RefStack *)ptr;
3796 ref_stack_push (RefStack *rs, gpointer ptr)
3798 g_assert (rs != NULL);
3800 if (rs->bottom >= rs->allocated) {
3801 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3802 rs->allocated <<= 1;
3803 rs->refs [rs->allocated] = NULL;
3805 rs->refs [rs->bottom++] = ptr;
3809 ref_stack_pop (RefStack *rs)
3811 if (rs == NULL || rs->bottom == 0)
3815 rs->refs [rs->bottom] = NULL;
3819 ref_stack_find (RefStack *rs, gpointer ptr)
3826 for (refs = rs->refs; refs && *refs; refs++) {
3834 * mono_thread_push_appdomain_ref:
3836 * Register that the current thread may have references to objects in domain
3837 * @domain on its stack. Each call to this function should be paired with a
3838 * call to pop_appdomain_ref.
3841 mono_thread_push_appdomain_ref (MonoDomain *domain)
3843 MonoInternalThread *thread = mono_thread_internal_current ();
3846 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3847 SPIN_LOCK (thread->lock_thread_id);
3848 if (thread->appdomain_refs == NULL)
3849 thread->appdomain_refs = ref_stack_new (16);
3850 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3851 SPIN_UNLOCK (thread->lock_thread_id);
3856 mono_thread_pop_appdomain_ref (void)
3858 MonoInternalThread *thread = mono_thread_internal_current ();
3861 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3862 SPIN_LOCK (thread->lock_thread_id);
3863 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3864 SPIN_UNLOCK (thread->lock_thread_id);
3869 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3872 SPIN_LOCK (thread->lock_thread_id);
3873 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3874 SPIN_UNLOCK (thread->lock_thread_id);
3879 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3881 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3884 typedef struct abort_appdomain_data {
3885 struct wait_data wait;
3887 } abort_appdomain_data;
3890 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3892 MonoInternalThread *thread = (MonoInternalThread*)value;
3893 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3894 MonoDomain *domain = data->domain;
3896 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3897 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3899 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3900 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3901 data->wait.threads [data->wait.num] = thread;
3904 /* Just ignore the rest, we can't do anything with
3912 * mono_threads_abort_appdomain_threads:
3914 * Abort threads which has references to the given appdomain.
3917 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3919 #ifdef __native_client__
3923 abort_appdomain_data user_data;
3925 int orig_timeout = timeout;
3928 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3930 start_time = mono_msec_ticks ();
3932 mono_threads_lock ();
3934 user_data.domain = domain;
3935 user_data.wait.num = 0;
3936 /* This shouldn't take any locks */
3937 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3938 mono_threads_unlock ();
3940 if (user_data.wait.num > 0) {
3941 /* Abort the threads outside the threads lock */
3942 for (i = 0; i < user_data.wait.num; ++i)
3943 mono_thread_internal_abort (user_data.wait.threads [i]);
3946 * We should wait for the threads either to abort, or to leave the
3947 * domain. We can't do the latter, so we wait with a timeout.
3949 wait_for_tids (&user_data.wait, 100, FALSE);
3952 /* Update remaining time */
3953 timeout -= mono_msec_ticks () - start_time;
3954 start_time = mono_msec_ticks ();
3956 if (orig_timeout != -1 && timeout < 0)
3959 while (user_data.wait.num > 0);
3961 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3967 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3969 MonoInternalThread *thread = (MonoInternalThread*)value;
3970 MonoDomain *domain = (MonoDomain*)user_data;
3973 /* No locking needed here */
3974 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3976 if (thread->cached_culture_info) {
3977 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3978 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3979 if (obj && obj->vtable->domain == domain)
3980 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3986 * mono_threads_clear_cached_culture:
3988 * Clear the cached_current_culture from all threads if it is in the
3992 mono_threads_clear_cached_culture (MonoDomain *domain)
3994 mono_threads_lock ();
3995 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3996 mono_threads_unlock ();
4000 * mono_thread_get_undeniable_exception:
4002 * Return an exception which needs to be raised when leaving a catch clause.
4003 * This is used for undeniable exception propagation.
4006 mono_thread_get_undeniable_exception (void)
4008 MonoInternalThread *thread = mono_thread_internal_current ();
4010 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
4013 // We don't want to have our exception effect calls made by
4014 // the catching block
4016 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
4020 * FIXME: Clear the abort exception and return an AppDomainUnloaded
4021 * exception if the thread no longer references a dying appdomain.
4023 thread->abort_exc->trace_ips = NULL;
4024 thread->abort_exc->stack_trace = NULL;
4025 return thread->abort_exc;
4028 #if MONO_SMALL_CONFIG
4029 #define NUM_STATIC_DATA_IDX 4
4030 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4034 #define NUM_STATIC_DATA_IDX 8
4035 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4036 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
4040 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4041 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4044 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4046 gpointer *static_data = (gpointer *)addr;
4048 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4049 void **ptr = (void **)static_data [i];
4054 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4055 void **p = ptr + idx;
4058 mark_func ((MonoObject**)p, gc_data);
4064 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4066 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4070 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4072 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4076 * mono_alloc_static_data
4078 * Allocate memory blocks for storing threads or context static data
4081 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4083 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4086 gpointer* static_data = *static_data_ptr;
4088 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4089 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4091 if (mono_gc_user_markers_supported ()) {
4092 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4093 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4095 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4096 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4099 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4100 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4101 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4102 *static_data_ptr = static_data;
4103 static_data [0] = static_data;
4106 for (i = 1; i <= idx; ++i) {
4107 if (static_data [i])
4110 if (mono_gc_user_markers_supported ())
4111 static_data [i] = g_malloc0 (static_data_size [i]);
4113 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4114 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4115 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4120 mono_free_static_data (gpointer* static_data)
4123 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4124 gpointer p = static_data [i];
4128 * At this point, the static data pointer array is still registered with the
4129 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4130 * data. Freeing the individual arrays without first nulling their slots
4131 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4132 * such an already freed array. See bug #13813.
4134 static_data [i] = NULL;
4135 mono_memory_write_barrier ();
4136 if (mono_gc_user_markers_supported ())
4139 mono_gc_free_fixed (p);
4141 mono_gc_free_fixed (static_data);
4145 * mono_init_static_data_info
4147 * Initializes static data counters
4149 static void mono_init_static_data_info (StaticDataInfo *static_data)
4151 static_data->idx = 0;
4152 static_data->offset = 0;
4153 static_data->freelist = NULL;
4157 * mono_alloc_static_data_slot
4159 * Generates an offset for static data. static_data contains the counters
4160 * used to generate it.
4163 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4165 if (!static_data->idx && !static_data->offset) {
4167 * we use the first chunk of the first allocation also as
4168 * an array for the rest of the data
4170 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4172 static_data->offset += align - 1;
4173 static_data->offset &= ~(align - 1);
4174 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4175 static_data->idx ++;
4176 g_assert (size <= static_data_size [static_data->idx]);
4177 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4178 static_data->offset = 0;
4180 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4181 static_data->offset += size;
4186 * LOCKING: requires that threads_mutex is held
4189 context_adjust_static_data (MonoAppContext *ctx)
4191 if (context_static_info.offset || context_static_info.idx > 0) {
4192 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4193 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4194 ctx->data->static_data = ctx->static_data;
4199 * LOCKING: requires that threads_mutex is held
4202 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4204 MonoInternalThread *thread = (MonoInternalThread *)value;
4205 guint32 offset = GPOINTER_TO_UINT (user);
4207 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4211 * LOCKING: requires that threads_mutex is held
4214 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4216 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4221 guint32 offset = GPOINTER_TO_UINT (user);
4222 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4223 ctx->data->static_data = ctx->static_data;
4226 static StaticDataFreeList*
4227 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4229 StaticDataFreeList* prev = NULL;
4230 StaticDataFreeList* tmp = static_data->freelist;
4232 if (tmp->size == size) {
4234 prev->next = tmp->next;
4236 static_data->freelist = tmp->next;
4245 #if SIZEOF_VOID_P == 4
4252 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4254 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4256 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4257 MonoBitSet *rb = sets [idx];
4258 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4259 offset /= sizeof (uintptr_t);
4260 /* offset is now the bitmap offset */
4261 for (int i = 0; i < numbits; ++i) {
4262 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4263 mono_bitset_set_fast (rb, offset + i);
4268 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4270 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4271 MonoBitSet *rb = sets [idx];
4272 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4273 offset /= sizeof (uintptr_t);
4274 /* offset is now the bitmap offset */
4275 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4276 mono_bitset_clear_fast (rb, offset + i);
4280 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4282 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4284 StaticDataInfo *info;
4287 if (static_type == SPECIAL_STATIC_THREAD) {
4288 info = &thread_static_info;
4289 sets = thread_reference_bitmaps;
4291 info = &context_static_info;
4292 sets = context_reference_bitmaps;
4295 mono_threads_lock ();
4297 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4301 offset = item->offset;
4304 offset = mono_alloc_static_data_slot (info, size, align);
4307 update_reference_bitmap (sets, offset, bitmap, numbits);
4309 if (static_type == SPECIAL_STATIC_THREAD) {
4310 /* This can be called during startup */
4311 if (threads != NULL)
4312 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4314 if (contexts != NULL)
4315 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4317 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4320 mono_threads_unlock ();
4326 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4328 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4330 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4331 return get_thread_static_data (thread, offset);
4333 return get_context_static_data (thread->current_appcontext, offset);
4338 mono_get_special_static_data (guint32 offset)
4340 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4349 * LOCKING: requires that threads_mutex is held
4352 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4354 MonoInternalThread *thread = (MonoInternalThread *)value;
4355 OffsetSize *data = (OffsetSize *)user;
4356 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4357 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4360 if (!thread->static_data || !thread->static_data [idx])
4362 ptr = ((char*) thread->static_data [idx]) + off;
4363 mono_gc_bzero_atomic (ptr, data->size);
4367 * LOCKING: requires that threads_mutex is held
4370 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4372 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4377 OffsetSize *data = (OffsetSize *)user;
4378 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4379 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4382 if (!ctx->static_data || !ctx->static_data [idx])
4385 ptr = ((char*) ctx->static_data [idx]) + off;
4386 mono_gc_bzero_atomic (ptr, data->size);
4390 do_free_special_slot (guint32 offset, guint32 size)
4392 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4394 StaticDataInfo *info;
4396 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4397 info = &thread_static_info;
4398 sets = thread_reference_bitmaps;
4400 info = &context_static_info;
4401 sets = context_reference_bitmaps;
4404 guint32 data_offset = offset;
4405 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4406 OffsetSize data = { data_offset, size };
4408 clear_reference_bitmap (sets, data.offset, data.size);
4410 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4411 if (threads != NULL)
4412 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4414 if (contexts != NULL)
4415 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4418 if (!mono_runtime_is_shutting_down ()) {
4419 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4421 item->offset = offset;
4424 item->next = info->freelist;
4425 info->freelist = item;
4430 do_free_special (gpointer key, gpointer value, gpointer data)
4432 MonoClassField *field = (MonoClassField *)key;
4433 guint32 offset = GPOINTER_TO_UINT (value);
4436 size = mono_type_size (field->type, &align);
4437 do_free_special_slot (offset, size);
4441 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4443 mono_threads_lock ();
4445 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4447 mono_threads_unlock ();
4451 static void CALLBACK dummy_apc (ULONG_PTR param)
4457 * mono_thread_execute_interruption
4459 * Performs the operation that the requested thread state requires (abort,
4462 static MonoException*
4463 mono_thread_execute_interruption (void)
4465 MonoInternalThread *thread = mono_thread_internal_current ();
4466 MonoThread *sys_thread = mono_thread_current ();
4468 LOCK_THREAD (thread);
4470 /* MonoThread::interruption_requested can only be changed with atomics */
4471 if (mono_thread_clear_interruption_requested (thread)) {
4472 /* this will consume pending APC calls */
4474 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4476 InterlockedDecrement (&thread_interruption_requested);
4478 /* Clear the interrupted flag of the thread so it can wait again */
4479 mono_thread_info_clear_self_interrupt ();
4482 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4483 if (sys_thread->pending_exception) {
4486 exc = sys_thread->pending_exception;
4487 sys_thread->pending_exception = NULL;
4489 UNLOCK_THREAD (thread);
4491 } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4492 UNLOCK_THREAD (thread);
4493 g_assert (sys_thread->pending_exception == NULL);
4494 if (thread->abort_exc == NULL) {
4496 * This might be racy, but it has to be called outside the lock
4497 * since it calls managed code.
4499 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4501 return thread->abort_exc;
4503 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4504 /* calls UNLOCK_THREAD (thread) */
4505 self_suspend_internal ();
4508 else if ((thread->state & ThreadState_StopRequested) != 0) {
4509 /* FIXME: do this through the JIT? */
4511 UNLOCK_THREAD (thread);
4513 mono_thread_exit ();
4515 } else if (thread->thread_interrupt_requested) {
4517 thread->thread_interrupt_requested = FALSE;
4518 UNLOCK_THREAD (thread);
4520 return(mono_get_exception_thread_interrupted ());
4523 UNLOCK_THREAD (thread);
4529 * mono_thread_request_interruption
4531 * A signal handler can call this method to request the interruption of a
4532 * thread. The result of the interruption will depend on the current state of
4533 * the thread. If the result is an exception that needs to be throw, it is
4534 * provided as return value.
4537 mono_thread_request_interruption (gboolean running_managed)
4539 MonoInternalThread *thread = mono_thread_internal_current ();
4541 /* The thread may already be stopping */
4546 if (thread->interrupt_on_stop &&
4547 thread->state & ThreadState_StopRequested &&
4548 thread->state & ThreadState_Background)
4551 if (!mono_thread_set_interruption_requested (thread))
4553 InterlockedIncrement (&thread_interruption_requested);
4555 if (!running_managed || is_running_protected_wrapper ()) {
4556 /* Can't stop while in unmanaged code. Increase the global interruption
4557 request count. When exiting the unmanaged method the count will be
4558 checked and the thread will be interrupted. */
4560 /* this will awake the thread if it is in WaitForSingleObject
4562 /* Our implementation of this function ignores the func argument */
4564 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4566 mono_thread_info_self_interrupt ();
4571 return mono_thread_execute_interruption ();
4575 /*This function should be called by a thread after it has exited all of
4576 * its handle blocks at interruption time.*/
4578 mono_thread_resume_interruption (void)
4580 MonoInternalThread *thread = mono_thread_internal_current ();
4581 gboolean still_aborting;
4583 /* The thread may already be stopping */
4587 LOCK_THREAD (thread);
4588 still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4589 UNLOCK_THREAD (thread);
4591 /*This can happen if the protected block called Thread::ResetAbort*/
4592 if (!still_aborting)
4595 if (!mono_thread_set_interruption_requested (thread))
4597 InterlockedIncrement (&thread_interruption_requested);
4599 mono_thread_info_self_interrupt ();
4601 return mono_thread_execute_interruption ();
4604 gboolean mono_thread_interruption_requested ()
4606 if (thread_interruption_requested) {
4607 MonoInternalThread *thread = mono_thread_internal_current ();
4608 /* The thread may already be stopping */
4610 return mono_thread_get_interruption_requested (thread);
4615 static MonoException*
4616 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4618 MonoInternalThread *thread = mono_thread_internal_current ();
4620 /* The thread may already be stopping */
4623 if (!mono_thread_get_interruption_requested (thread))
4625 if (!bypass_abort_protection && is_running_protected_wrapper ())
4628 return mono_thread_execute_interruption ();
4632 * Performs the interruption of the current thread, if one has been requested,
4633 * and the thread is not running a protected wrapper.
4634 * Return the exception which needs to be thrown, if any.
4637 mono_thread_interruption_checkpoint (void)
4639 return mono_thread_interruption_checkpoint_request (FALSE);
4643 * Performs the interruption of the current thread, if one has been requested.
4644 * Return the exception which needs to be thrown, if any.
4647 mono_thread_force_interruption_checkpoint_noraise (void)
4649 return mono_thread_interruption_checkpoint_request (TRUE);
4653 * mono_set_pending_exception:
4655 * Set the pending exception of the current thread to EXC.
4656 * The exception will be thrown when execution returns to managed code.
4659 mono_set_pending_exception (MonoException *exc)
4661 MonoThread *thread = mono_thread_current ();
4663 /* The thread may already be stopping */
4667 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4669 mono_thread_request_interruption (FALSE);
4673 * mono_thread_interruption_request_flag:
4675 * Returns the address of a flag that will be non-zero if an interruption has
4676 * been requested for a thread. The thread to interrupt may not be the current
4677 * thread, so an additional call to mono_thread_interruption_requested() or
4678 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4681 gint32* mono_thread_interruption_request_flag ()
4683 return &thread_interruption_requested;
4687 mono_thread_init_apartment_state (void)
4690 MonoInternalThread* thread = mono_thread_internal_current ();
4692 /* Positive return value indicates success, either
4693 * S_OK if this is first CoInitialize call, or
4694 * S_FALSE if CoInitialize already called, but with same
4695 * threading model. A negative value indicates failure,
4696 * probably due to trying to change the threading model.
4698 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4699 ? COINIT_APARTMENTTHREADED
4700 : COINIT_MULTITHREADED) < 0) {
4701 thread->apartment_state = ThreadApartmentState_Unknown;
4707 mono_thread_cleanup_apartment_state (void)
4710 MonoInternalThread* thread = mono_thread_internal_current ();
4712 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4719 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4721 LOCK_THREAD (thread);
4722 thread->state |= state;
4723 UNLOCK_THREAD (thread);
4727 * mono_thread_test_and_set_state:
4729 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4731 * Returns TRUE is @set was OR'd in.
4734 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4736 LOCK_THREAD (thread);
4738 if ((thread->state & test) != 0) {
4739 UNLOCK_THREAD (thread);
4743 thread->state |= set;
4744 UNLOCK_THREAD (thread);
4750 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4752 LOCK_THREAD (thread);
4753 thread->state &= ~state;
4754 UNLOCK_THREAD (thread);
4758 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4760 gboolean ret = FALSE;
4762 LOCK_THREAD (thread);
4764 if ((thread->state & test) != 0) {
4768 UNLOCK_THREAD (thread);
4774 self_interrupt_thread (void *_unused)
4777 MonoThreadInfo *info;
4779 exc = mono_thread_execute_interruption ();
4781 if (mono_threads_is_coop_enabled ()) {
4782 /* We can return from an async call in coop, as
4783 * it's simply called when exiting the safepoint */
4787 g_error ("%s: we can't resume from an async call", __func__);
4790 info = mono_thread_info_current ();
4792 /* We must use _with_context since we didn't trampoline into the runtime */
4793 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. */
4797 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4801 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4805 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4807 MonoJitInfo **dest = (MonoJitInfo **)data;
4813 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4815 MonoJitInfo *ji = NULL;
4820 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4821 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4822 * where we hold runtime locks.
4824 if (!mono_threads_is_coop_enabled ())
4825 mono_thread_info_set_is_async_context (TRUE);
4826 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4827 if (!mono_threads_is_coop_enabled ())
4828 mono_thread_info_set_is_async_context (FALSE);
4833 MonoInternalThread *thread;
4834 gboolean install_async_abort;
4835 MonoThreadInfoInterruptToken *interrupt_token;
4838 static SuspendThreadResult
4839 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4841 AbortThreadData *data = (AbortThreadData *)ud;
4842 MonoInternalThread *thread = data->thread;
4843 MonoJitInfo *ji = NULL;
4844 gboolean protected_wrapper;
4845 gboolean running_managed;
4847 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4848 return MonoResumeThread;
4851 The target thread is running at least one protected block, which must not be interrupted, so we give up.
4852 The protected block code will give them a chance when appropriate.
4854 if (mono_thread_get_abort_prot_block_count (thread) > 0)
4855 return MonoResumeThread;
4857 /*someone is already interrupting it*/
4858 if (!mono_thread_set_interruption_requested (thread))
4859 return MonoResumeThread;
4861 InterlockedIncrement (&thread_interruption_requested);
4863 ji = mono_thread_info_get_last_managed (info);
4864 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4865 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4867 if (!protected_wrapper && running_managed) {
4868 /*We are in managed code*/
4869 /*Set the thread to call */
4870 if (data->install_async_abort)
4871 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4872 return MonoResumeThread;
4875 * This will cause waits to be broken.
4876 * It will also prevent the thread from entering a wait, so if the thread returns
4877 * from the wait before it receives the abort signal, it will just spin in the wait
4878 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4881 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4883 return MonoResumeThread;
4888 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4890 AbortThreadData data;
4892 g_assert (thread != mono_thread_internal_current ());
4894 data.thread = thread;
4895 data.install_async_abort = install_async_abort;
4896 data.interrupt_token = NULL;
4898 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4899 if (data.interrupt_token)
4900 mono_thread_info_finish_interrupt (data.interrupt_token);
4901 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4905 self_abort_internal (MonoError *error)
4909 mono_error_init (error);
4911 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4912 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4915 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.
4917 exc = mono_thread_request_interruption (TRUE);
4919 mono_error_set_exception_instance (error, exc);
4921 mono_thread_info_self_interrupt ();
4925 MonoInternalThread *thread;
4927 MonoThreadInfoInterruptToken *interrupt_token;
4928 } SuspendThreadData;
4930 static SuspendThreadResult
4931 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4933 SuspendThreadData *data = (SuspendThreadData *)ud;
4934 MonoInternalThread *thread = data->thread;
4935 MonoJitInfo *ji = NULL;
4936 gboolean protected_wrapper;
4937 gboolean running_managed;
4939 ji = mono_thread_info_get_last_managed (info);
4940 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4941 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4943 if (running_managed && !protected_wrapper) {
4944 if (mono_threads_is_coop_enabled ()) {
4945 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4946 return MonoResumeThread;
4948 thread->state &= ~ThreadState_SuspendRequested;
4949 thread->state |= ThreadState_Suspended;
4950 return KeepSuspended;
4953 if (mono_thread_set_interruption_requested (thread))
4954 InterlockedIncrement (&thread_interruption_requested);
4955 if (data->interrupt)
4956 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4958 return MonoResumeThread;
4962 /* LOCKING: called with @thread synch_cs held, and releases it */
4964 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4966 SuspendThreadData data;
4968 g_assert (thread != mono_thread_internal_current ());
4970 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4972 thread->self_suspended = FALSE;
4974 data.thread = thread;
4975 data.interrupt = interrupt;
4976 data.interrupt_token = NULL;
4978 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4979 if (data.interrupt_token)
4980 mono_thread_info_finish_interrupt (data.interrupt_token);
4982 UNLOCK_THREAD (thread);
4985 /* LOCKING: called with @thread synch_cs held, and releases it */
4987 self_suspend_internal (void)
4989 MonoInternalThread *thread;
4991 MonoOSEventWaitRet res;
4993 thread = mono_thread_internal_current ();
4995 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4997 thread->self_suspended = TRUE;
4999 thread->state &= ~ThreadState_SuspendRequested;
5000 thread->state |= ThreadState_Suspended;
5002 UNLOCK_THREAD (thread);
5004 event = thread->suspended;
5007 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT);
5008 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
5013 * mono_thread_is_foreign:
5014 * @thread: the thread to query
5016 * This function allows one to determine if a thread was created by the mono runtime and has
5017 * a well defined lifecycle or it's a foreigh one, created by the native environment.
5019 * Returns: TRUE if @thread was not created by the runtime.
5022 mono_thread_is_foreign (MonoThread *thread)
5024 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
5025 return info->runtime_thread == FALSE;
5029 * mono_add_joinable_thread:
5031 * Add TID to the list of joinable threads.
5032 * LOCKING: Acquires the threads lock.
5035 mono_threads_add_joinable_thread (gpointer tid)
5039 * We cannot detach from threads because it causes problems like
5040 * 2fd16f60/r114307. So we collect them and join them when
5041 * we have time (in he finalizer thread).
5043 joinable_threads_lock ();
5044 if (!joinable_threads)
5045 joinable_threads = g_hash_table_new (NULL, NULL);
5046 g_hash_table_insert (joinable_threads, tid, tid);
5047 joinable_thread_count ++;
5048 joinable_threads_unlock ();
5050 mono_gc_finalize_notify ();
5055 * mono_threads_join_threads:
5057 * Join all joinable threads. This is called from the finalizer thread.
5058 * LOCKING: Acquires the threads lock.
5061 mono_threads_join_threads (void)
5064 GHashTableIter iter;
5071 if (!joinable_thread_count)
5075 joinable_threads_lock ();
5077 if (g_hash_table_size (joinable_threads)) {
5078 g_hash_table_iter_init (&iter, joinable_threads);
5079 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5080 thread = (pthread_t)tid;
5081 g_hash_table_remove (joinable_threads, key);
5082 joinable_thread_count --;
5085 joinable_threads_unlock ();
5087 if (thread != pthread_self ()) {
5089 /* This shouldn't block */
5090 mono_native_thread_join (thread);
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));