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)
19 #include <mono/metadata/object.h>
20 #include <mono/metadata/domain-internals.h>
21 #include <mono/metadata/profiler-private.h>
22 #include <mono/metadata/threads.h>
23 #include <mono/metadata/threadpool.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-internal.h>
29 #include <mono/metadata/marshal.h>
30 #include <mono/io-layer/io-layer.h>
31 #ifndef PLATFORM_WIN32
32 #include <mono/io-layer/threads.h>
34 #include <mono/metadata/object-internals.h>
35 #include <mono/metadata/mono-debug-debugger.h>
36 #include <mono/utils/mono-compiler.h>
37 #include <mono/utils/mono-mmap.h>
38 #include <mono/utils/mono-membar.h>
39 #include <mono/utils/mono-time.h>
41 #include <mono/metadata/gc-internal.h>
43 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
44 #define THREAD_DEBUG(a)
45 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
46 #define THREAD_WAIT_DEBUG(a)
47 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
48 #define LIBGC_DEBUG(a)
50 /* Provide this for systems with glib < 2.6 */
51 #ifndef G_GSIZE_FORMAT
52 # if GLIB_SIZEOF_LONG == 8
53 # define G_GSIZE_FORMAT "lu"
55 # define G_GSIZE_FORMAT "u"
61 guint32 (*func)(void *);
78 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
79 struct _MonoThreadDomainTls {
80 MonoThreadDomainTls *next;
88 MonoThreadDomainTls *freelist;
93 MonoHazardousFreeFunc free_func;
96 /* Number of cached culture objects in the MonoThread->cached_culture_info array
97 * (per-type): we use the first NUM entries for CultureInfo and the last for
98 * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
100 #define NUM_CACHED_CULTURES 4
101 #define CULTURES_START_IDX 0
102 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
104 /* Controls access to the 'threads' hash table */
105 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
106 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
107 static CRITICAL_SECTION threads_mutex;
109 /* Controls access to context static data */
110 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
111 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
112 static CRITICAL_SECTION contexts_mutex;
114 /* Holds current status of static data heap */
115 static StaticDataInfo thread_static_info;
116 static StaticDataInfo context_static_info;
118 /* The hash of existing threads (key is thread ID) that need joining
121 static MonoGHashTable *threads=NULL;
124 * Threads which are starting up and they are not in the 'threads' hash yet.
125 * When handle_store is called for a thread, it will be removed from this hash table.
126 * Protected by mono_threads_lock ().
128 static MonoGHashTable *threads_starting_up = NULL;
130 /* The TLS key that holds the MonoObject assigned to each thread */
131 static guint32 current_object_key = -1;
133 #ifdef HAVE_KW_THREAD
134 /* we need to use both the Tls* functions and __thread because
135 * the gc needs to see all the threads
137 static __thread MonoThread * tls_current_object MONO_TLS_FAST;
138 #define SET_CURRENT_OBJECT(x) do { \
139 tls_current_object = x; \
140 TlsSetValue (current_object_key, x); \
142 #define GET_CURRENT_OBJECT() tls_current_object
144 #define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x);
145 #define GET_CURRENT_OBJECT() (MonoThread*) TlsGetValue (current_object_key);
148 /* function called at thread start */
149 static MonoThreadStartCB mono_thread_start_cb = NULL;
151 /* function called at thread attach */
152 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
154 /* function called at thread cleanup */
155 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
157 /* function called to notify the runtime about a pending exception on the current thread */
158 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
160 /* The default stack size for each thread */
161 static guint32 default_stacksize = 0;
162 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
164 static void thread_adjust_static_data (MonoThread *thread);
165 static void mono_init_static_data_info (StaticDataInfo *static_data);
166 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
167 static gboolean mono_thread_resume (MonoThread* thread);
168 static void mono_thread_start (MonoThread *thread);
169 static void signal_thread_state_change (MonoThread *thread);
171 /* Spin lock for InterlockedXXX 64 bit functions */
172 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
173 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
174 static CRITICAL_SECTION interlocked_mutex;
176 /* global count of thread interruptions requested */
177 static gint32 thread_interruption_requested = 0;
179 /* Event signaled when a thread changes its background mode */
180 static HANDLE background_change_event;
182 /* The table for small ID assignment */
183 static CRITICAL_SECTION small_id_mutex;
184 static int small_id_table_size = 0;
185 static int small_id_next = 0;
186 static int highest_small_id = -1;
187 static MonoThread **small_id_table = NULL;
189 /* The hazard table */
190 #define HAZARD_TABLE_MAX_SIZE 16384 /* There cannot be more threads than this number. */
191 static volatile int hazard_table_size = 0;
192 static MonoThreadHazardPointers * volatile hazard_table = NULL;
194 /* The table where we keep pointers to blocks to be freed but that
195 have to wait because they're guarded by a hazard pointer. */
196 static CRITICAL_SECTION delayed_free_table_mutex;
197 static GArray *delayed_free_table = NULL;
199 static gboolean shutting_down = FALSE;
202 mono_thread_get_tls_key (void)
204 return current_object_key;
208 mono_thread_get_tls_offset (void)
211 MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
215 /* handle_store() and handle_remove() manage the array of threads that
216 * still need to be waited for when the main thread exits.
218 * If handle_store() returns FALSE the thread must not be started
219 * because Mono is shutting down.
221 static gboolean handle_store(MonoThread *thread)
223 mono_threads_lock ();
225 THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->tid));
227 if (threads_starting_up)
228 mono_g_hash_table_remove (threads_starting_up, thread);
231 mono_threads_unlock ();
236 MONO_GC_REGISTER_ROOT (threads);
237 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
240 /* We don't need to duplicate thread->handle, because it is
241 * only closed when the thread object is finalized by the GC.
243 mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->tid),
246 mono_threads_unlock ();
251 static gboolean handle_remove(MonoThread *thread)
254 gsize tid = thread->tid;
256 THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
258 mono_threads_lock ();
261 /* We have to check whether the thread object for the
262 * tid is still the same in the table because the
263 * thread might have been destroyed and the tid reused
264 * in the meantime, in which case the tid would be in
265 * the table, but with another thread object.
267 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
268 mono_g_hash_table_remove (threads, (gpointer)tid);
277 mono_threads_unlock ();
279 /* Don't close the handle here, wait for the object finalizer
280 * to do it. Otherwise, the following race condition applies:
282 * 1) Thread exits (and handle_remove() closes the handle)
284 * 2) Some other handle is reassigned the same slot
286 * 3) Another thread tries to join the first thread, and
287 * blocks waiting for the reassigned handle to be signalled
288 * (which might never happen). This is possible, because the
289 * thread calling Join() still has a reference to the first
296 * Allocate a small thread id.
298 * FIXME: The biggest part of this function is very similar to
299 * domain_id_alloc() in domain.c and should be merged.
302 small_id_alloc (MonoThread *thread)
306 EnterCriticalSection (&small_id_mutex);
308 if (!small_id_table) {
309 small_id_table_size = 2;
310 small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoThread*), NULL);
312 for (i = small_id_next; i < small_id_table_size; ++i) {
313 if (!small_id_table [i]) {
319 for (i = 0; i < small_id_next; ++i) {
320 if (!small_id_table [i]) {
327 MonoThread **new_table;
328 int new_size = small_id_table_size * 2;
329 if (new_size >= (1 << 16))
330 g_assert_not_reached ();
331 id = small_id_table_size;
332 new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoThread*), NULL);
333 memcpy (new_table, small_id_table, small_id_table_size * sizeof (void*));
334 mono_gc_free_fixed (small_id_table);
335 small_id_table = new_table;
336 small_id_table_size = new_size;
338 thread->small_id = id;
339 g_assert (small_id_table [id] == NULL);
340 small_id_table [id] = thread;
342 if (small_id_next > small_id_table_size)
345 if (id >= hazard_table_size) {
347 int pagesize = mono_pagesize ();
348 int num_pages = (hazard_table_size * sizeof (MonoThreadHazardPointers) + pagesize - 1) / pagesize;
350 if (hazard_table == NULL) {
351 hazard_table = mono_valloc (NULL,
352 sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE,
356 g_assert (hazard_table != NULL);
357 page_addr = (guint8*)hazard_table + num_pages * pagesize;
359 g_assert (id < HAZARD_TABLE_MAX_SIZE);
361 mono_mprotect (page_addr, pagesize, MONO_MMAP_READ | MONO_MMAP_WRITE);
364 hazard_table_size = num_pages * pagesize / sizeof (MonoThreadHazardPointers);
366 g_assert (id < hazard_table_size);
368 hazard_table [id].hazard_pointers [0] = NULL;
369 hazard_table [id].hazard_pointers [1] = NULL;
372 if (id > highest_small_id) {
373 highest_small_id = id;
374 mono_memory_write_barrier ();
377 LeaveCriticalSection (&small_id_mutex);
383 small_id_free (int id)
385 g_assert (id >= 0 && id < small_id_table_size);
386 g_assert (small_id_table [id] != NULL);
388 small_id_table [id] = NULL;
392 is_pointer_hazardous (gpointer p)
395 int highest = highest_small_id;
397 g_assert (highest < hazard_table_size);
399 for (i = 0; i <= highest; ++i) {
400 if (hazard_table [i].hazard_pointers [0] == p
401 || hazard_table [i].hazard_pointers [1] == p)
408 MonoThreadHazardPointers*
409 mono_hazard_pointer_get (void)
411 MonoThread *current_thread = mono_thread_current ();
413 if (!(current_thread && current_thread->small_id >= 0)) {
414 static MonoThreadHazardPointers emerg_hazard_table;
415 g_warning ("Thread %p may have been prematurely finalized", current_thread);
416 return &emerg_hazard_table;
419 return &hazard_table [current_thread->small_id];
423 try_free_delayed_free_item (int index)
425 if (delayed_free_table->len > index) {
426 DelayedFreeItem item = { NULL, NULL };
428 EnterCriticalSection (&delayed_free_table_mutex);
429 /* We have to check the length again because another
430 thread might have freed an item before we acquired
432 if (delayed_free_table->len > index) {
433 item = g_array_index (delayed_free_table, DelayedFreeItem, index);
435 if (!is_pointer_hazardous (item.p))
436 g_array_remove_index_fast (delayed_free_table, index);
440 LeaveCriticalSection (&delayed_free_table_mutex);
443 item.free_func (item.p);
448 mono_thread_hazardous_free_or_queue (gpointer p, MonoHazardousFreeFunc free_func)
452 /* First try to free a few entries in the delayed free
454 for (i = 2; i >= 0; --i)
455 try_free_delayed_free_item (i);
457 /* Now see if the pointer we're freeing is hazardous. If it
458 isn't, free it. Otherwise put it in the delay list. */
459 if (is_pointer_hazardous (p)) {
460 DelayedFreeItem item = { p, free_func };
462 ++mono_stats.hazardous_pointer_count;
464 EnterCriticalSection (&delayed_free_table_mutex);
465 g_array_append_val (delayed_free_table, item);
466 LeaveCriticalSection (&delayed_free_table_mutex);
472 mono_thread_hazardous_try_free_all (void)
477 if (!delayed_free_table)
480 len = delayed_free_table->len;
482 for (i = len - 1; i >= 0; --i)
483 try_free_delayed_free_item (i);
486 static void ensure_synch_cs_set (MonoThread *thread)
488 CRITICAL_SECTION *synch_cs;
490 if (thread->synch_cs != NULL) {
494 synch_cs = g_new0 (CRITICAL_SECTION, 1);
495 InitializeCriticalSection (synch_cs);
497 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
498 synch_cs, NULL) != NULL) {
499 /* Another thread must have installed this CS */
500 DeleteCriticalSection (synch_cs);
506 * NOTE: this function can be called also for threads different from the current one:
507 * make sure no code called from it will ever assume it is run on the thread that is
508 * getting cleaned up.
510 static void thread_cleanup (MonoThread *thread)
512 g_assert (thread != NULL);
514 /* if the thread is not in the hash it has been removed already */
515 if (!handle_remove (thread))
517 mono_release_type_locks (thread);
519 EnterCriticalSection (thread->synch_cs);
521 thread->state |= ThreadState_Stopped;
522 thread->state &= ~ThreadState_Background;
524 LeaveCriticalSection (thread->synch_cs);
526 mono_profiler_thread_end (thread->tid);
528 if (thread == mono_thread_current ())
529 mono_thread_pop_appdomain_ref ();
531 if (thread->serialized_culture_info)
532 g_free (thread->serialized_culture_info);
534 g_free (thread->name);
536 thread->cached_culture_info = NULL;
538 mono_gc_free_fixed (thread->static_data);
539 thread->static_data = NULL;
541 if (mono_thread_cleanup_fn)
542 mono_thread_cleanup_fn (thread);
544 small_id_free (thread->small_id);
545 thread->small_id = -2;
548 static guint32 WINAPI start_wrapper(void *data)
550 struct StartInfo *start_info=(struct StartInfo *)data;
551 guint32 (*start_func)(void *);
554 MonoThread *thread=start_info->obj;
555 MonoObject *start_delegate = start_info->delegate;
557 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
559 /* We can be sure start_info->obj->tid and
560 * start_info->obj->handle have been set, because the thread
561 * was created suspended, and these values were set before the
567 SET_CURRENT_OBJECT (thread);
569 mono_monitor_init_tls ();
571 /* Every thread references the appdomain which created it */
572 mono_thread_push_appdomain_ref (start_info->domain);
574 if (!mono_domain_set (start_info->domain, FALSE)) {
575 /* No point in raising an appdomain_unloaded exception here */
576 /* FIXME: Cleanup here */
577 mono_thread_pop_appdomain_ref ();
581 start_func = start_info->func;
582 start_arg = start_info->start_arg;
584 /* This MUST be called before any managed code can be
585 * executed, as it calls the callback function that (for the
586 * jit) sets the lmf marker.
588 mono_thread_new_init (tid, &tid, start_func);
589 thread->stack_ptr = &tid;
591 LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
593 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
595 mono_profiler_thread_start (tid);
597 /* On 2.0 profile (and higher), set explicitly since state might have been
599 if (mono_framework_version () != 1) {
600 if (thread->apartment_state == ThreadApartmentState_Unknown)
601 thread->apartment_state = ThreadApartmentState_MTA;
604 mono_thread_init_apartment_state ();
606 if(thread->start_notify!=NULL) {
607 /* Let the thread that called Start() know we're
610 ReleaseSemaphore (thread->start_notify, 1, NULL);
613 MONO_GC_UNREGISTER_ROOT (start_info->start_arg);
616 thread_adjust_static_data (thread);
618 g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
622 /* start_func is set only for unmanaged start functions */
624 start_func (start_arg);
627 g_assert (start_delegate != NULL);
628 args [0] = start_arg;
629 /* we may want to handle the exception here. See comment below on unhandled exceptions */
630 mono_runtime_delegate_invoke (start_delegate, args, NULL);
633 /* If the thread calls ExitThread at all, this remaining code
634 * will not be executed, but the main thread will eventually
635 * call thread_cleanup() on this thread's behalf.
638 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
640 thread_cleanup (thread);
642 /* Do any cleanup needed for apartment state. This
643 * cannot be done in thread_cleanup since thread_cleanup could be
644 * called for a thread other than the current thread.
645 * mono_thread_cleanup_apartment_state cleans up apartment
646 * for the current thead */
647 mono_thread_cleanup_apartment_state ();
649 /* Remove the reference to the thread object in the TLS data,
650 * so the thread object can be finalized. This won't be
651 * reached if the thread threw an uncaught exception, so those
652 * thread handles will stay referenced :-( (This is due to
653 * missing support for scanning thread-specific data in the
654 * Boehm GC - the io-layer keeps a GC-visible hash of pointers
657 SET_CURRENT_OBJECT (NULL);
662 void mono_thread_new_init (gsize tid, gpointer stack_start, gpointer func)
664 if (mono_thread_start_cb) {
665 mono_thread_start_cb (tid, stack_start, func);
669 void mono_threads_set_default_stacksize (guint32 stacksize)
671 default_stacksize = stacksize;
674 guint32 mono_threads_get_default_stacksize (void)
676 return default_stacksize;
680 * mono_create_thread:
682 * This is a wrapper around CreateThread which handles differences in the type of
683 * the the 'tid' argument.
685 gpointer mono_create_thread (WapiSecurityAttributes *security,
686 guint32 stacksize, WapiThreadStart start,
687 gpointer param, guint32 create, gsize *tid)
691 #ifdef PLATFORM_WIN32
694 res = CreateThread (security, stacksize, start, param, create, &real_tid);
698 res = CreateThread (security, stacksize, start, param, create, tid);
704 void mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread)
707 HANDLE thread_handle;
708 struct StartInfo *start_info;
711 thread=(MonoThread *)mono_object_new (domain,
712 mono_defaults.thread_class);
714 start_info=g_new0 (struct StartInfo, 1);
715 start_info->func = func;
716 start_info->obj = thread;
717 start_info->domain = domain;
718 start_info->start_arg = arg;
721 * The argument may be an object reference, and there is no ref to keep it alive
722 * when the new thread is started but not yet registered with the collector.
724 MONO_GC_REGISTER_ROOT (start_info->start_arg);
726 mono_threads_lock ();
728 mono_threads_unlock ();
731 if (threads_starting_up == NULL) {
732 MONO_GC_REGISTER_ROOT (threads_starting_up);
733 threads_starting_up = mono_g_hash_table_new (NULL, NULL);
735 mono_g_hash_table_insert (threads_starting_up, thread, thread);
736 mono_threads_unlock ();
738 /* Create suspended, so we can do some housekeeping before the thread
741 thread_handle = mono_create_thread (NULL, default_stacksize_for_thread (thread), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
742 CREATE_SUSPENDED, &tid);
743 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
744 if (thread_handle == NULL) {
745 /* The thread couldn't be created, so throw an exception */
746 MONO_GC_UNREGISTER_ROOT (start_info->start_arg);
747 mono_threads_lock ();
748 mono_g_hash_table_remove (threads_starting_up, thread);
749 mono_threads_unlock ();
751 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
755 thread->handle=thread_handle;
757 thread->apartment_state=ThreadApartmentState_Unknown;
758 small_id_alloc (thread);
760 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
761 InitializeCriticalSection (thread->synch_cs);
763 thread->threadpool_thread = threadpool_thread;
764 if (threadpool_thread)
765 mono_thread_set_state (thread, ThreadState_Background);
767 if (handle_store (thread))
768 ResumeThread (thread_handle);
772 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
774 mono_thread_create_internal (domain, func, arg, FALSE);
778 * mono_thread_get_stack_bounds:
780 * Return the address and size of the current threads stack. Return NULL as the
781 * stack address if the stack address cannot be determined.
784 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
786 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
787 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
788 *stsize = pthread_get_stacksize_np (pthread_self ());
789 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
791 /* FIXME: simplify the mess below */
792 #elif !defined(PLATFORM_WIN32)
794 guint8 *current = (guint8*)&attr;
796 pthread_attr_init (&attr);
797 #ifdef HAVE_PTHREAD_GETATTR_NP
798 pthread_getattr_np (pthread_self(), &attr);
800 #ifdef HAVE_PTHREAD_ATTR_GET_NP
801 pthread_attr_get_np (pthread_self(), &attr);
804 pthread_attr_getstacksize (&attr, &stsize);
813 pthread_attr_getstack (&attr, (void**)staddr, stsize);
815 g_assert ((current > *staddr) && (current < *staddr + *stsize));
818 pthread_attr_destroy (&attr);
821 /* When running under emacs, sometimes staddr is not aligned to a page size */
822 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
826 mono_thread_attach (MonoDomain *domain)
829 HANDLE thread_handle;
832 if ((thread = mono_thread_current ())) {
833 if (domain != mono_domain_get ())
834 mono_domain_set (domain, TRUE);
835 /* Already attached */
839 if (!mono_gc_register_thread (&domain)) {
840 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.", GetCurrentThreadId ());
843 thread = (MonoThread *)mono_object_new (domain,
844 mono_defaults.thread_class);
846 thread_handle = GetCurrentThread ();
847 g_assert (thread_handle);
849 tid=GetCurrentThreadId ();
852 * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
853 * refer to the thread from other threads for things like aborting.
855 DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
856 THREAD_ALL_ACCESS, TRUE, 0);
858 thread->handle=thread_handle;
860 thread->apartment_state=ThreadApartmentState_Unknown;
861 small_id_alloc (thread);
862 thread->stack_ptr = &tid;
864 thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
865 InitializeCriticalSection (thread->synch_cs);
867 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
869 if (!handle_store (thread)) {
870 /* Mono is shutting down, so just wait for the end */
875 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
877 SET_CURRENT_OBJECT (thread);
878 mono_domain_set (domain, TRUE);
880 mono_monitor_init_tls ();
882 thread_adjust_static_data (thread);
884 if (mono_thread_attach_cb) {
888 mono_thread_get_stack_bounds (&staddr, &stsize);
891 mono_thread_attach_cb (tid, &tid);
893 mono_thread_attach_cb (tid, staddr + stsize);
900 mono_thread_detach (MonoThread *thread)
902 g_return_if_fail (thread != NULL);
904 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
906 thread_cleanup (thread);
908 SET_CURRENT_OBJECT (NULL);
910 /* Don't need to CloseHandle this thread, even though we took a
911 * reference in mono_thread_attach (), because the GC will do it
912 * when the Thread object is finalised.
919 MonoThread *thread = mono_thread_current ();
921 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
923 thread_cleanup (thread);
924 SET_CURRENT_OBJECT (NULL);
926 /* we could add a callback here for embedders to use. */
927 if (thread == mono_thread_get_main ())
928 exit (mono_environment_exitcode_get ());
932 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
935 guint32 (*start_func)(void *);
936 struct StartInfo *start_info;
942 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
944 ensure_synch_cs_set (this);
946 EnterCriticalSection (this->synch_cs);
948 if ((this->state & ThreadState_Unstarted) == 0) {
949 LeaveCriticalSection (this->synch_cs);
950 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
956 if ((this->state & ThreadState_Aborted) != 0) {
957 LeaveCriticalSection (this->synch_cs);
962 /* This is freed in start_wrapper */
963 start_info = g_new0 (struct StartInfo, 1);
964 start_info->func = start_func;
965 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
966 start_info->delegate = start;
967 start_info->obj = this;
968 start_info->domain = mono_domain_get ();
970 this->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
971 if(this->start_notify==NULL) {
972 LeaveCriticalSection (this->synch_cs);
973 g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
977 mono_threads_lock ();
978 if (threads_starting_up == NULL) {
979 MONO_GC_REGISTER_ROOT (threads_starting_up);
980 threads_starting_up = mono_g_hash_table_new (NULL, NULL);
982 mono_g_hash_table_insert (threads_starting_up, this, this);
983 mono_threads_unlock ();
985 thread=mono_create_thread(NULL, default_stacksize_for_thread (this), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
986 CREATE_SUSPENDED, &tid);
988 LeaveCriticalSection (this->synch_cs);
989 mono_threads_lock ();
990 mono_g_hash_table_remove (threads_starting_up, this);
991 mono_threads_unlock ();
992 g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
998 small_id_alloc (this);
1000 /* Don't call handle_store() here, delay it to Start.
1001 * We can't join a thread (trying to will just block
1002 * forever) until it actually starts running, so don't
1003 * store the handle till then.
1006 mono_thread_start (this);
1008 this->state &= ~ThreadState_Unstarted;
1010 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1012 LeaveCriticalSection (this->synch_cs);
1017 void ves_icall_System_Threading_Thread_Thread_init (MonoThread *this)
1019 MONO_ARCH_SAVE_REGS;
1021 ensure_synch_cs_set (this);
1024 void ves_icall_System_Threading_Thread_Thread_free_internal (MonoThread *this,
1027 MONO_ARCH_SAVE_REGS;
1029 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1031 CloseHandle (thread);
1033 DeleteCriticalSection (this->synch_cs);
1034 g_free (this->synch_cs);
1035 this->synch_cs = NULL;
1037 if (this->abort_state_handle) {
1038 g_assert (this->abort_exc);
1039 mono_gchandle_free (this->abort_state_handle);
1040 this->abort_state_handle = 0;
1044 static void mono_thread_start (MonoThread *thread)
1046 MONO_ARCH_SAVE_REGS;
1048 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1050 /* Only store the handle when the thread is about to be
1051 * launched, to avoid the main thread deadlocking while trying
1052 * to clean up a thread that will never be signalled.
1054 if (!handle_store (thread))
1057 ResumeThread (thread->handle);
1059 if(thread->start_notify!=NULL) {
1060 /* Wait for the thread to set up its TLS data etc, so
1061 * theres no potential race condition if someone tries
1062 * to look up the data believing the thread has
1066 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1068 WaitForSingleObjectEx (thread->start_notify, INFINITE, FALSE);
1069 CloseHandle (thread->start_notify);
1070 thread->start_notify = NULL;
1073 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1076 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1078 MonoThread *thread = mono_thread_current ();
1080 MONO_ARCH_SAVE_REGS;
1082 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1084 mono_thread_current_check_pending_interrupt ();
1086 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1090 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1093 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1098 ves_icall_System_Threading_Thread_GetDomainID (void)
1100 MONO_ARCH_SAVE_REGS;
1102 return mono_domain_get()->domain_id;
1106 ves_icall_System_Threading_Thread_GetName_internal (MonoThread *this_obj)
1110 ensure_synch_cs_set (this_obj);
1112 EnterCriticalSection (this_obj->synch_cs);
1114 if (!this_obj->name)
1117 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1119 LeaveCriticalSection (this_obj->synch_cs);
1125 ves_icall_System_Threading_Thread_SetName_internal (MonoThread *this_obj, MonoString *name)
1127 ensure_synch_cs_set (this_obj);
1129 EnterCriticalSection (this_obj->synch_cs);
1131 if (this_obj->name) {
1132 LeaveCriticalSection (this_obj->synch_cs);
1134 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1138 this_obj->name = g_new (gunichar2, mono_string_length (name));
1139 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1140 this_obj->name_len = mono_string_length (name);
1143 this_obj->name = NULL;
1145 LeaveCriticalSection (this_obj->synch_cs);
1149 lookup_cached_culture (MonoThread *this, MonoDomain *domain, int start_idx)
1154 if (this->cached_culture_info) {
1155 domain = mono_domain_get ();
1156 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1157 res = mono_array_get (this->cached_culture_info, MonoObject*, i);
1158 if (res && res->vtable->domain == domain)
1167 ves_icall_System_Threading_Thread_GetCachedCurrentCulture (MonoThread *this)
1169 return lookup_cached_culture (this, mono_domain_get (), CULTURES_START_IDX);
1173 ves_icall_System_Threading_Thread_GetSerializedCurrentCulture (MonoThread *this)
1177 ensure_synch_cs_set (this);
1179 EnterCriticalSection (this->synch_cs);
1181 if (this->serialized_culture_info) {
1182 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_culture_info_len);
1183 memcpy (mono_array_addr (res, guint8, 0), this->serialized_culture_info, this->serialized_culture_info_len);
1188 LeaveCriticalSection (this->synch_cs);
1194 cache_culture (MonoThread *this, MonoObject *culture, int start_idx)
1197 MonoDomain *domain = mono_domain_get ();
1200 int same_domain_slot = -1;
1202 ensure_synch_cs_set (this);
1204 EnterCriticalSection (this->synch_cs);
1206 if (!this->cached_culture_info)
1207 MONO_OBJECT_SETREF (this, cached_culture_info, mono_array_new_cached (mono_object_domain (this), mono_defaults.object_class, NUM_CACHED_CULTURES * 2));
1209 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1210 obj = mono_array_get (this->cached_culture_info, MonoObject*, i);
1214 /* we continue, because there may be a slot used with the same domain */
1218 if (obj->vtable->domain == domain) {
1219 same_domain_slot = i;
1223 if (same_domain_slot >= 0)
1224 mono_array_setref (this->cached_culture_info, same_domain_slot, culture);
1225 else if (free_slot >= 0)
1226 mono_array_setref (this->cached_culture_info, free_slot, culture);
1227 /* we may want to replace an existing entry here, even when no suitable slot is found */
1229 LeaveCriticalSection (this->synch_cs);
1233 ves_icall_System_Threading_Thread_SetCachedCurrentCulture (MonoThread *this, MonoObject *culture)
1235 cache_culture (this, culture, CULTURES_START_IDX);
1239 ves_icall_System_Threading_Thread_SetSerializedCurrentCulture (MonoThread *this, MonoArray *arr)
1241 ensure_synch_cs_set (this);
1243 EnterCriticalSection (this->synch_cs);
1245 if (this->serialized_culture_info)
1246 g_free (this->serialized_culture_info);
1247 this->serialized_culture_info = g_new0 (guint8, mono_array_length (arr));
1248 this->serialized_culture_info_len = mono_array_length (arr);
1249 memcpy (this->serialized_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1251 LeaveCriticalSection (this->synch_cs);
1256 ves_icall_System_Threading_Thread_GetCachedCurrentUICulture (MonoThread *this)
1258 return lookup_cached_culture (this, mono_domain_get (), UICULTURES_START_IDX);
1262 ves_icall_System_Threading_Thread_GetSerializedCurrentUICulture (MonoThread *this)
1266 ensure_synch_cs_set (this);
1268 EnterCriticalSection (this->synch_cs);
1270 if (this->serialized_ui_culture_info) {
1271 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_ui_culture_info_len);
1272 memcpy (mono_array_addr (res, guint8, 0), this->serialized_ui_culture_info, this->serialized_ui_culture_info_len);
1277 LeaveCriticalSection (this->synch_cs);
1283 ves_icall_System_Threading_Thread_SetCachedCurrentUICulture (MonoThread *this, MonoObject *culture)
1285 cache_culture (this, culture, UICULTURES_START_IDX);
1289 ves_icall_System_Threading_Thread_SetSerializedCurrentUICulture (MonoThread *this, MonoArray *arr)
1291 ensure_synch_cs_set (this);
1293 EnterCriticalSection (this->synch_cs);
1295 if (this->serialized_ui_culture_info)
1296 g_free (this->serialized_ui_culture_info);
1297 this->serialized_ui_culture_info = g_new0 (guint8, mono_array_length (arr));
1298 this->serialized_ui_culture_info_len = mono_array_length (arr);
1299 memcpy (this->serialized_ui_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1301 LeaveCriticalSection (this->synch_cs);
1304 /* the jit may read the compiled code of this function */
1306 mono_thread_current (void)
1308 MonoThread *res = GET_CURRENT_OBJECT ()
1309 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1313 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoThread *this,
1314 int ms, HANDLE thread)
1316 MonoThread *cur_thread = mono_thread_current ();
1319 MONO_ARCH_SAVE_REGS;
1321 mono_thread_current_check_pending_interrupt ();
1323 ensure_synch_cs_set (this);
1325 EnterCriticalSection (this->synch_cs);
1327 if ((this->state & ThreadState_Unstarted) != 0) {
1328 LeaveCriticalSection (this->synch_cs);
1330 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1334 LeaveCriticalSection (this->synch_cs);
1339 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1341 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1343 ret=WaitForSingleObjectEx (thread, ms, TRUE);
1345 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1347 if(ret==WAIT_OBJECT_0) {
1348 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1353 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1358 /* FIXME: exitContext isnt documented */
1359 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1365 MonoObject *waitHandle;
1366 MonoThread *thread = mono_thread_current ();
1368 MONO_ARCH_SAVE_REGS;
1370 /* Do this WaitSleepJoin check before creating objects */
1371 mono_thread_current_check_pending_interrupt ();
1373 numhandles = mono_array_length(mono_handles);
1374 handles = g_new0(HANDLE, numhandles);
1376 for(i = 0; i < numhandles; i++) {
1377 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1378 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1385 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1387 ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1389 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1393 if(ret==WAIT_FAILED) {
1394 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1396 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1397 /* Do we want to try again if we get
1398 * WAIT_IO_COMPLETION? The documentation for
1399 * WaitHandle doesn't give any clues. (We'd have to
1400 * fiddle with the timeout if we retry.)
1402 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1409 /* FIXME: exitContext isnt documented */
1410 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1416 MonoObject *waitHandle;
1417 MonoThread *thread = mono_thread_current ();
1419 MONO_ARCH_SAVE_REGS;
1421 /* Do this WaitSleepJoin check before creating objects */
1422 mono_thread_current_check_pending_interrupt ();
1424 numhandles = mono_array_length(mono_handles);
1425 handles = g_new0(HANDLE, numhandles);
1427 for(i = 0; i < numhandles; i++) {
1428 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1429 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1436 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1438 ret=WaitForMultipleObjectsEx(numhandles, handles, FALSE, ms, TRUE);
1440 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1444 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1447 * These need to be here. See MSDN dos on WaitForMultipleObjects.
1449 if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1450 return ret - WAIT_OBJECT_0;
1452 else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1453 return ret - WAIT_ABANDONED_0;
1460 /* FIXME: exitContext isnt documented */
1461 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1464 MonoThread *thread = mono_thread_current ();
1466 MONO_ARCH_SAVE_REGS;
1468 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1474 mono_thread_current_check_pending_interrupt ();
1476 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1478 ret=WaitForSingleObjectEx (handle, ms, TRUE);
1480 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1482 if(ret==WAIT_FAILED) {
1483 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1485 } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1486 /* Do we want to try again if we get
1487 * WAIT_IO_COMPLETION? The documentation for
1488 * WaitHandle doesn't give any clues. (We'd have to
1489 * fiddle with the timeout if we retry.)
1491 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1499 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1502 MonoThread *thread = mono_thread_current ();
1504 MONO_ARCH_SAVE_REGS;
1509 mono_thread_current_check_pending_interrupt ();
1511 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1513 ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1515 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1517 return (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1520 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1524 MONO_ARCH_SAVE_REGS;
1529 mutex = CreateMutex (NULL, owned, NULL);
1531 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1533 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1541 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1542 MONO_ARCH_SAVE_REGS;
1544 return(ReleaseMutex (handle));
1547 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1553 MONO_ARCH_SAVE_REGS;
1555 *error = ERROR_SUCCESS;
1557 ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1559 *error = GetLastError ();
1566 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1570 MONO_ARCH_SAVE_REGS;
1575 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1577 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1578 mono_string_chars (name));
1580 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1588 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1592 MONO_ARCH_SAVE_REGS;
1594 *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1599 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1603 MONO_ARCH_SAVE_REGS;
1605 *error = ERROR_SUCCESS;
1607 ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1609 *error = GetLastError ();
1615 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1619 MONO_ARCH_SAVE_REGS;
1624 event = CreateEvent (NULL, manual, initial, NULL);
1626 event = CreateEvent (NULL, manual, initial,
1627 mono_string_chars (name));
1629 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1637 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1638 MONO_ARCH_SAVE_REGS;
1640 return (SetEvent(handle));
1643 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1644 MONO_ARCH_SAVE_REGS;
1646 return (ResetEvent(handle));
1650 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1651 MONO_ARCH_SAVE_REGS;
1653 CloseHandle (handle);
1656 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1662 MONO_ARCH_SAVE_REGS;
1664 *error = ERROR_SUCCESS;
1666 ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1668 *error = GetLastError ();
1674 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1676 MONO_ARCH_SAVE_REGS;
1678 return InterlockedIncrement (location);
1681 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1685 MONO_ARCH_SAVE_REGS;
1687 mono_interlocked_lock ();
1691 mono_interlocked_unlock ();
1697 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1699 MONO_ARCH_SAVE_REGS;
1701 return InterlockedDecrement(location);
1704 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1708 MONO_ARCH_SAVE_REGS;
1710 mono_interlocked_lock ();
1714 mono_interlocked_unlock ();
1719 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1721 MONO_ARCH_SAVE_REGS;
1723 return InterlockedExchange(location, value);
1726 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1728 MONO_ARCH_SAVE_REGS;
1730 return (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1733 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1735 IntFloatUnion val, ret;
1737 MONO_ARCH_SAVE_REGS;
1740 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1746 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1748 #if SIZEOF_VOID_P == 8
1749 return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1754 * According to MSDN, this function is only atomic with regards to the
1755 * other Interlocked functions on 32 bit platforms.
1757 mono_interlocked_lock ();
1760 mono_interlocked_unlock ();
1767 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1769 #if SIZEOF_VOID_P == 8
1770 LongDoubleUnion val, ret;
1773 ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1780 * According to MSDN, this function is only atomic with regards to the
1781 * other Interlocked functions on 32 bit platforms.
1783 mono_interlocked_lock ();
1786 mono_interlocked_unlock ();
1792 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1794 MONO_ARCH_SAVE_REGS;
1796 return InterlockedCompareExchange(location, value, comparand);
1799 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1801 MONO_ARCH_SAVE_REGS;
1803 return (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1806 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1808 IntFloatUnion val, ret, cmp;
1810 MONO_ARCH_SAVE_REGS;
1813 cmp.fval = comparand;
1814 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1820 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1822 #if SIZEOF_VOID_P == 8
1823 LongDoubleUnion val, comp, ret;
1826 comp.fval = comparand;
1827 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1833 mono_interlocked_lock ();
1835 if (old == comparand)
1837 mono_interlocked_unlock ();
1844 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1846 #if SIZEOF_VOID_P == 8
1847 return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1851 mono_interlocked_lock ();
1853 if (old == comparand)
1855 mono_interlocked_unlock ();
1862 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1864 MONO_ARCH_SAVE_REGS;
1866 return InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1870 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1872 MONO_ARCH_SAVE_REGS;
1874 return InterlockedExchangePointer ((gpointer *)location, value);
1878 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1880 #if SIZEOF_VOID_P == 8
1881 /* Should be implemented as a JIT intrinsic */
1882 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1887 mono_interlocked_lock ();
1889 *location = orig + value;
1890 mono_interlocked_unlock ();
1892 return orig + value;
1897 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
1899 #if SIZEOF_VOID_P == 8
1900 /* Should be implemented as a JIT intrinsic */
1901 mono_raise_exception (mono_get_exception_not_implemented (NULL));
1906 mono_interlocked_lock ();
1908 *location = orig + value;
1909 mono_interlocked_unlock ();
1911 return orig + value;
1916 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
1918 #if SIZEOF_VOID_P == 8
1919 /* 64 bit reads are already atomic */
1924 mono_interlocked_lock ();
1926 mono_interlocked_unlock ();
1933 ves_icall_System_Threading_Thread_MemoryBarrier (void)
1935 mono_threads_lock ();
1936 mono_threads_unlock ();
1940 ves_icall_System_Threading_Thread_ClrState (MonoThread* this, guint32 state)
1942 mono_thread_clr_state (this, state);
1944 if (state & ThreadState_Background) {
1945 /* If the thread changes the background mode, the main thread has to
1946 * be notified, since it has to rebuild the list of threads to
1949 SetEvent (background_change_event);
1954 ves_icall_System_Threading_Thread_SetState (MonoThread* this, guint32 state)
1956 mono_thread_set_state (this, state);
1958 if (state & ThreadState_Background) {
1959 /* If the thread changes the background mode, the main thread has to
1960 * be notified, since it has to rebuild the list of threads to
1963 SetEvent (background_change_event);
1968 ves_icall_System_Threading_Thread_GetState (MonoThread* this)
1972 ensure_synch_cs_set (this);
1974 EnterCriticalSection (this->synch_cs);
1976 state = this->state;
1978 LeaveCriticalSection (this->synch_cs);
1983 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this)
1985 gboolean throw = FALSE;
1987 ensure_synch_cs_set (this);
1989 if (this == mono_thread_current ())
1992 EnterCriticalSection (this->synch_cs);
1994 this->thread_interrupt_requested = TRUE;
1996 if (this->state & ThreadState_WaitSleepJoin) {
2000 LeaveCriticalSection (this->synch_cs);
2003 signal_thread_state_change (this);
2007 void mono_thread_current_check_pending_interrupt ()
2009 MonoThread *thread = mono_thread_current ();
2010 gboolean throw = FALSE;
2012 mono_debugger_check_interruption ();
2014 ensure_synch_cs_set (thread);
2016 EnterCriticalSection (thread->synch_cs);
2018 if (thread->thread_interrupt_requested) {
2020 thread->thread_interrupt_requested = FALSE;
2023 LeaveCriticalSection (thread->synch_cs);
2026 mono_raise_exception (mono_get_exception_thread_interrupted ());
2031 mono_thread_get_abort_signal (void)
2033 #ifdef PLATFORM_WIN32
2043 static int abort_signum = -1;
2045 if (abort_signum != -1)
2046 return abort_signum;
2047 /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2048 for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2049 struct sigaction sinfo;
2050 sigaction (i, NULL, &sinfo);
2051 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2056 /* fallback to the old way */
2059 #endif /* PLATFORM_WIN32 */
2062 #ifdef PLATFORM_WIN32
2063 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2065 MonoException* exc = mono_thread_request_interruption (FALSE);
2066 if (exc) mono_raise_exception (exc);
2068 #endif /* PLATFORM_WIN32 */
2071 * signal_thread_state_change
2073 * Tells the thread that his state has changed and it has to enter the new
2074 * state as soon as possible.
2076 static void signal_thread_state_change (MonoThread *thread)
2078 if (thread == mono_thread_current ()) {
2079 /* Do it synchronously */
2080 MonoException *exc = mono_thread_request_interruption (FALSE);
2082 mono_raise_exception (exc);
2085 #ifdef PLATFORM_WIN32
2086 QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2088 /* fixme: store the state somewhere */
2089 #ifdef PTHREAD_POINTER_ID
2090 pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
2092 pthread_kill (thread->tid, mono_thread_get_abort_signal ());
2096 * This will cause waits to be broken.
2097 * It will also prevent the thread from entering a wait, so if the thread returns
2098 * from the wait before it receives the abort signal, it will just spin in the wait
2099 * functions in the io-layer until the signal handler calls QueueUserAPC which will
2102 wapi_interrupt_thread (thread->handle);
2103 #endif /* PLATFORM_WIN32 */
2107 ves_icall_System_Threading_Thread_Abort (MonoThread *thread, MonoObject *state)
2109 MONO_ARCH_SAVE_REGS;
2111 ensure_synch_cs_set (thread);
2113 EnterCriticalSection (thread->synch_cs);
2115 if ((thread->state & ThreadState_AbortRequested) != 0 ||
2116 (thread->state & ThreadState_StopRequested) != 0 ||
2117 (thread->state & ThreadState_Stopped) != 0)
2119 LeaveCriticalSection (thread->synch_cs);
2123 if ((thread->state & ThreadState_Unstarted) != 0) {
2124 thread->state |= ThreadState_Aborted;
2125 LeaveCriticalSection (thread->synch_cs);
2129 thread->state |= ThreadState_AbortRequested;
2130 if (thread->abort_state_handle)
2131 mono_gchandle_free (thread->abort_state_handle);
2133 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2134 g_assert (thread->abort_state_handle);
2136 thread->abort_state_handle = 0;
2138 thread->abort_exc = NULL;
2140 LeaveCriticalSection (thread->synch_cs);
2142 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2144 /* During shutdown, we can't wait for other threads */
2146 /* Make sure the thread is awake */
2147 mono_thread_resume (thread);
2149 signal_thread_state_change (thread);
2153 ves_icall_System_Threading_Thread_ResetAbort (void)
2155 MonoThread *thread = mono_thread_current ();
2157 MONO_ARCH_SAVE_REGS;
2159 ensure_synch_cs_set (thread);
2161 EnterCriticalSection (thread->synch_cs);
2163 thread->state &= ~ThreadState_AbortRequested;
2165 if (!thread->abort_exc) {
2166 const char *msg = "Unable to reset abort because no abort was requested";
2167 LeaveCriticalSection (thread->synch_cs);
2168 mono_raise_exception (mono_get_exception_thread_state (msg));
2170 thread->abort_exc = NULL;
2171 if (thread->abort_state_handle) {
2172 mono_gchandle_free (thread->abort_state_handle);
2173 /* This is actually not necessary - the handle
2174 only counts if the exception is set */
2175 thread->abort_state_handle = 0;
2179 LeaveCriticalSection (thread->synch_cs);
2183 serialize_object (MonoObject *obj, gboolean *failure, MonoObject **exc)
2185 static MonoMethod *serialize_method;
2190 if (!serialize_method) {
2191 MonoClass *klass = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting", "RemotingServices");
2192 serialize_method = mono_class_get_method_from_name (klass, "SerializeCallData", -1);
2195 if (!serialize_method) {
2200 g_assert (!obj->vtable->klass->marshalbyref);
2204 array = mono_runtime_invoke (serialize_method, NULL, params, exc);
2212 deserialize_object (MonoObject *obj, gboolean *failure, MonoObject **exc)
2214 static MonoMethod *deserialize_method;
2219 if (!deserialize_method) {
2220 MonoClass *klass = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting", "RemotingServices");
2221 deserialize_method = mono_class_get_method_from_name (klass, "DeserializeCallData", -1);
2223 if (!deserialize_method) {
2230 result = mono_runtime_invoke (deserialize_method, NULL, params, exc);
2238 make_transparent_proxy (MonoObject *obj, gboolean *failure, MonoObject **exc)
2240 static MonoMethod *get_proxy_method;
2242 MonoDomain *domain = mono_domain_get ();
2243 MonoRealProxy *real_proxy;
2244 MonoReflectionType *reflection_type;
2245 MonoTransparentProxy *transparent_proxy;
2247 if (!get_proxy_method)
2248 get_proxy_method = mono_class_get_method_from_name (mono_defaults.real_proxy_class, "GetTransparentProxy", 0);
2250 g_assert (obj->vtable->klass->marshalbyref);
2252 real_proxy = (MonoRealProxy*) mono_object_new (domain, mono_defaults.real_proxy_class);
2253 reflection_type = mono_type_get_object (domain, &obj->vtable->klass->byval_arg);
2255 real_proxy->class_to_proxy = reflection_type;
2256 real_proxy->unwrapped_server = obj;
2259 transparent_proxy = (MonoTransparentProxy*) mono_runtime_invoke (get_proxy_method, real_proxy, NULL, exc);
2263 return (MonoObject*) transparent_proxy;
2267 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *thread)
2269 MonoObject *state, *serialized, *deserialized, *exc;
2271 gboolean failure = FALSE;
2273 if (!thread->abort_state_handle)
2276 state = mono_gchandle_get_target (thread->abort_state_handle);
2279 domain = mono_domain_get ();
2280 if (state->vtable->domain == domain)
2283 if (state->vtable->klass->marshalbyref) {
2284 deserialized = make_transparent_proxy (state, &failure, &exc);
2286 mono_domain_set_internal_with_options (state->vtable->domain, FALSE);
2287 serialized = serialize_object (state, &failure, &exc);
2288 mono_domain_set_internal_with_options (domain, FALSE);
2290 deserialized = deserialize_object (serialized, &failure, &exc);
2294 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2296 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2297 mono_raise_exception (invalid_op_exc);
2300 return deserialized;
2304 mono_thread_suspend (MonoThread *thread)
2306 MONO_ARCH_SAVE_REGS;
2308 ensure_synch_cs_set (thread);
2310 EnterCriticalSection (thread->synch_cs);
2312 if ((thread->state & ThreadState_Unstarted) != 0 ||
2313 (thread->state & ThreadState_Aborted) != 0 ||
2314 (thread->state & ThreadState_Stopped) != 0)
2316 LeaveCriticalSection (thread->synch_cs);
2320 if ((thread->state & ThreadState_Suspended) != 0 ||
2321 (thread->state & ThreadState_SuspendRequested) != 0 ||
2322 (thread->state & ThreadState_StopRequested) != 0)
2324 LeaveCriticalSection (thread->synch_cs);
2328 thread->state |= ThreadState_SuspendRequested;
2330 LeaveCriticalSection (thread->synch_cs);
2332 signal_thread_state_change (thread);
2337 ves_icall_System_Threading_Thread_Suspend (MonoThread *thread)
2339 if (!mono_thread_suspend (thread))
2340 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2344 mono_thread_resume (MonoThread *thread)
2346 MONO_ARCH_SAVE_REGS;
2348 ensure_synch_cs_set (thread);
2350 EnterCriticalSection (thread->synch_cs);
2352 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2353 thread->state &= ~ThreadState_SuspendRequested;
2354 LeaveCriticalSection (thread->synch_cs);
2358 if ((thread->state & ThreadState_Suspended) == 0 ||
2359 (thread->state & ThreadState_Unstarted) != 0 ||
2360 (thread->state & ThreadState_Aborted) != 0 ||
2361 (thread->state & ThreadState_Stopped) != 0)
2363 LeaveCriticalSection (thread->synch_cs);
2367 thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2368 if (thread->resume_event == NULL) {
2369 LeaveCriticalSection (thread->synch_cs);
2373 /* Awake the thread */
2374 SetEvent (thread->suspend_event);
2376 LeaveCriticalSection (thread->synch_cs);
2378 /* Wait for the thread to awake */
2379 WaitForSingleObject (thread->resume_event, INFINITE);
2380 CloseHandle (thread->resume_event);
2381 thread->resume_event = NULL;
2387 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2389 if (!mono_thread_resume (thread))
2390 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2394 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2399 if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
2400 m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
2401 m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
2403 *((gboolean*)data) = TRUE;
2410 is_running_protected_wrapper (void)
2412 gboolean found = FALSE;
2413 mono_stack_walk (find_wrapper, &found);
2417 void mono_thread_stop (MonoThread *thread)
2419 ensure_synch_cs_set (thread);
2421 EnterCriticalSection (thread->synch_cs);
2423 if ((thread->state & ThreadState_StopRequested) != 0 ||
2424 (thread->state & ThreadState_Stopped) != 0)
2426 LeaveCriticalSection (thread->synch_cs);
2430 /* Make sure the thread is awake */
2431 mono_thread_resume (thread);
2433 thread->state |= ThreadState_StopRequested;
2434 thread->state &= ~ThreadState_AbortRequested;
2436 LeaveCriticalSection (thread->synch_cs);
2438 signal_thread_state_change (thread);
2442 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2444 return *((volatile gint8 *) (ptr));
2448 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2450 return *((volatile gint16 *) (ptr));
2454 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2456 return *((volatile gint32 *) (ptr));
2460 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2462 return *((volatile gint64 *) (ptr));
2466 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2468 return (void *) *((volatile void **) ptr);
2472 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2474 *((volatile gint8 *) ptr) = value;
2478 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2480 *((volatile gint16 *) ptr) = value;
2484 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2486 *((volatile gint32 *) ptr) = value;
2490 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2492 *((volatile gint64 *) ptr) = value;
2496 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2498 *((volatile void **) ptr) = value;
2501 void mono_thread_init (MonoThreadStartCB start_cb,
2502 MonoThreadAttachCB attach_cb)
2504 MONO_GC_REGISTER_ROOT (small_id_table);
2505 InitializeCriticalSection(&threads_mutex);
2506 InitializeCriticalSection(&interlocked_mutex);
2507 InitializeCriticalSection(&contexts_mutex);
2508 InitializeCriticalSection(&delayed_free_table_mutex);
2509 InitializeCriticalSection(&small_id_mutex);
2511 background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2512 g_assert(background_change_event != NULL);
2514 mono_init_static_data_info (&thread_static_info);
2515 mono_init_static_data_info (&context_static_info);
2517 current_object_key=TlsAlloc();
2518 THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2520 mono_thread_start_cb = start_cb;
2521 mono_thread_attach_cb = attach_cb;
2523 delayed_free_table = g_array_new (FALSE, FALSE, sizeof (DelayedFreeItem));
2525 /* Get a pseudo handle to the current process. This is just a
2526 * kludge so that wapi can build a process handle if needed.
2527 * As a pseudo handle is returned, we don't need to clean
2530 GetCurrentProcess ();
2533 void mono_thread_cleanup (void)
2535 mono_thread_hazardous_try_free_all ();
2537 #if !defined(PLATFORM_WIN32) && !defined(RUN_IN_SUBTHREAD)
2538 /* The main thread must abandon any held mutexes (particularly
2539 * important for named mutexes as they are shared across
2540 * processes, see bug 74680.) This will happen when the
2541 * thread exits, but if it's not running in a subthread it
2542 * won't exit in time.
2544 /* Using non-w32 API is a nasty kludge, but I couldn't find
2545 * anything in the documentation that would let me do this
2546 * here yet still be safe to call on windows.
2548 _wapi_thread_signal_self (mono_environment_exitcode_get ());
2552 /* This stuff needs more testing, it seems one of these
2553 * critical sections can be locked when mono_thread_cleanup is
2556 DeleteCriticalSection (&threads_mutex);
2557 DeleteCriticalSection (&interlocked_mutex);
2558 DeleteCriticalSection (&contexts_mutex);
2559 DeleteCriticalSection (&delayed_free_table_mutex);
2560 DeleteCriticalSection (&small_id_mutex);
2561 CloseHandle (background_change_event);
2564 g_array_free (delayed_free_table, TRUE);
2565 delayed_free_table = NULL;
2567 TlsFree (current_object_key);
2571 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2573 mono_thread_cleanup_fn = func;
2577 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2579 thread->manage_callback = func;
2582 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2584 mono_thread_notify_pending_exc_fn = func;
2588 static void print_tids (gpointer key, gpointer value, gpointer user)
2590 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2591 * sizeof(uint) and a cast to uint would overflow
2593 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2594 * print this as a pointer.
2596 g_message ("Waiting for: %p", key);
2601 HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2602 MonoThread *threads[MAXIMUM_WAIT_OBJECTS];
2606 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2610 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2612 ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, FALSE);
2614 if(ret==WAIT_FAILED) {
2615 /* See the comment in build_wait_tids() */
2616 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2620 for(i=0; i<wait->num; i++)
2621 CloseHandle (wait->handles[i]);
2623 if (ret == WAIT_TIMEOUT)
2626 for(i=0; i<wait->num; i++) {
2627 gsize tid = wait->threads[i]->tid;
2629 mono_threads_lock ();
2630 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2631 /* This thread must have been killed, because
2632 * it hasn't cleaned itself up. (It's just
2633 * possible that the thread exited before the
2634 * parent thread had a chance to store the
2635 * handle, and now there is another pointer to
2636 * the already-exited thread stored. In this
2637 * case, we'll just get two
2638 * mono_profiler_thread_end() calls for the
2642 mono_threads_unlock ();
2643 THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2644 thread_cleanup (wait->threads[i]);
2646 mono_threads_unlock ();
2651 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2653 guint32 i, ret, count;
2655 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2657 /* Add the thread state change event, so it wakes up if a thread changes
2658 * to background mode.
2661 if (count < MAXIMUM_WAIT_OBJECTS) {
2662 wait->handles [count] = background_change_event;
2666 ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, FALSE);
2668 if(ret==WAIT_FAILED) {
2669 /* See the comment in build_wait_tids() */
2670 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2674 for(i=0; i<wait->num; i++)
2675 CloseHandle (wait->handles[i]);
2677 if (ret == WAIT_TIMEOUT)
2680 if (ret < wait->num) {
2681 gsize tid = wait->threads[ret]->tid;
2682 mono_threads_lock ();
2683 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2684 /* See comment in wait_for_tids about thread cleanup */
2685 mono_threads_unlock ();
2686 THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2687 thread_cleanup (wait->threads [ret]);
2689 mono_threads_unlock ();
2693 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2695 struct wait_data *wait=(struct wait_data *)user;
2697 if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2699 MonoThread *thread=(MonoThread *)value;
2701 /* Ignore background threads, we abort them later */
2702 /* Do not lock here since it is not needed and the caller holds threads_lock */
2703 if (thread->state & ThreadState_Background) {
2704 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2705 return; /* just leave, ignore */
2708 if (mono_gc_is_finalizer_thread (thread)) {
2709 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2713 if (thread == mono_thread_current ()) {
2714 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2718 if (thread == mono_thread_get_main ()) {
2719 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2723 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2724 if (handle == NULL) {
2725 THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2729 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2730 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread) == TRUE)) {
2731 wait->handles[wait->num]=handle;
2732 wait->threads[wait->num]=thread;
2735 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2737 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2742 /* Just ignore the rest, we can't do anything with
2749 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2751 struct wait_data *wait=(struct wait_data *)user;
2752 gsize self = GetCurrentThreadId ();
2753 MonoThread *thread = (MonoThread *) value;
2756 if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2759 /* The finalizer thread is not a background thread */
2760 if (thread->tid != self && (thread->state & ThreadState_Background) != 0) {
2762 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2766 /* printf ("A: %d\n", wait->num); */
2767 wait->handles[wait->num]=thread->handle;
2768 wait->threads[wait->num]=thread;
2771 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2772 mono_thread_stop (thread);
2776 return (thread->tid != self && !mono_gc_is_finalizer_thread (thread));
2779 static MonoException* mono_thread_execute_interruption (MonoThread *thread);
2782 * mono_threads_set_shutting_down:
2784 * Is called by a thread that wants to shut down Mono. If the runtime is already
2785 * shutting down, the calling thread is suspended/stopped, and this function never
2789 mono_threads_set_shutting_down (void)
2791 MonoThread *current_thread = mono_thread_current ();
2793 mono_threads_lock ();
2795 if (shutting_down) {
2796 mono_threads_unlock ();
2798 /* Make sure we're properly suspended/stopped */
2800 EnterCriticalSection (current_thread->synch_cs);
2802 if ((current_thread->state & ThreadState_SuspendRequested) ||
2803 (current_thread->state & ThreadState_AbortRequested) ||
2804 (current_thread->state & ThreadState_StopRequested)) {
2805 LeaveCriticalSection (current_thread->synch_cs);
2806 mono_thread_execute_interruption (current_thread);
2808 current_thread->state |= ThreadState_Stopped;
2809 LeaveCriticalSection (current_thread->synch_cs);
2812 /* Wake up other threads potentially waiting for us */
2815 shutting_down = TRUE;
2817 /* Not really a background state change, but this will
2818 * interrupt the main thread if it is waiting for all
2819 * the other threads.
2821 SetEvent (background_change_event);
2823 mono_threads_unlock ();
2828 * mono_threads_is_shutting_down:
2830 * Returns whether a thread has commenced shutdown of Mono. Note that
2831 * if the function returns FALSE the caller must not assume that
2832 * shutdown is not in progress, because the situation might have
2833 * changed since the function returned. For that reason this function
2834 * is of very limited utility.
2837 mono_threads_is_shutting_down (void)
2839 return shutting_down;
2842 void mono_thread_manage (void)
2844 struct wait_data *wait=g_new0 (struct wait_data, 1);
2846 /* join each thread that's still running */
2847 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2849 mono_threads_lock ();
2851 THREAD_DEBUG (g_message("%s: No threads", __func__));
2852 mono_threads_unlock ();
2855 mono_threads_unlock ();
2858 mono_threads_lock ();
2859 if (shutting_down) {
2860 /* somebody else is shutting down */
2861 mono_threads_unlock ();
2864 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2865 mono_g_hash_table_foreach (threads, print_tids, NULL));
2867 ResetEvent (background_change_event);
2869 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2870 mono_threads_unlock ();
2872 /* Something to wait for */
2873 wait_for_tids_or_state_change (wait, INFINITE);
2875 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2876 } while(wait->num>0);
2878 mono_threads_set_shutting_down ();
2880 /* No new threads will be created after this point */
2882 mono_runtime_set_shutting_down ();
2884 THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2885 mono_thread_pool_cleanup ();
2888 * Remove everything but the finalizer thread and self.
2889 * Also abort all the background threads
2892 mono_threads_lock ();
2895 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
2897 mono_threads_unlock ();
2899 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
2901 /* Something to wait for */
2902 wait_for_tids (wait, INFINITE);
2904 } while (wait->num > 0);
2907 * give the subthreads a chance to really quit (this is mainly needed
2908 * to get correct user and system times from getrusage/wait/time(1)).
2909 * This could be removed if we avoid pthread_detach() and use pthread_join().
2911 #ifndef PLATFORM_WIN32
2918 static void terminate_thread (gpointer key, gpointer value, gpointer user)
2920 MonoThread *thread=(MonoThread *)value;
2922 if(thread->tid != (gsize)user) {
2923 /*TerminateThread (thread->handle, -1);*/
2927 void mono_thread_abort_all_other_threads (void)
2929 gsize self = GetCurrentThreadId ();
2931 mono_threads_lock ();
2932 THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
2933 mono_g_hash_table_size (threads));
2934 mono_g_hash_table_foreach (threads, print_tids, NULL));
2936 mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
2938 mono_threads_unlock ();
2942 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
2944 MonoThread *thread = (MonoThread*)value;
2945 struct wait_data *wait = (struct wait_data*)user_data;
2949 * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
2951 * This needs no locking.
2953 if ((thread->state & ThreadState_Suspended) != 0 ||
2954 (thread->state & ThreadState_Stopped) != 0)
2957 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
2958 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2962 wait->handles [wait->num] = handle;
2963 wait->threads [wait->num] = thread;
2969 * mono_thread_suspend_all_other_threads:
2971 * Suspend all managed threads except the finalizer thread and this thread. It is
2972 * not possible to resume them later.
2974 void mono_thread_suspend_all_other_threads (void)
2976 struct wait_data *wait = g_new0 (struct wait_data, 1);
2978 gsize self = GetCurrentThreadId ();
2980 guint32 eventidx = 0;
2981 gboolean starting, finished;
2984 * The other threads could be in an arbitrary state at this point, i.e.
2985 * they could be starting up, shutting down etc. This means that there could be
2986 * threads which are not even in the threads hash table yet.
2990 * First we set a barrier which will be checked by all threads before they
2991 * are added to the threads hash table, and they will exit if the flag is set.
2992 * This ensures that no threads could be added to the hash later.
2993 * We will use shutting_down as the barrier for now.
2995 g_assert (shutting_down);
2998 * We make multiple calls to WaitForMultipleObjects since:
2999 * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3000 * - some threads could exit without becoming suspended
3005 * Make a copy of the hashtable since we can't do anything with
3006 * threads while threads_mutex is held.
3009 mono_threads_lock ();
3010 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3011 mono_threads_unlock ();
3013 events = g_new0 (gpointer, wait->num);
3015 /* Get the suspended events that we'll be waiting for */
3016 for (i = 0; i < wait->num; ++i) {
3017 MonoThread *thread = wait->threads [i];
3018 gboolean signal_suspend = FALSE;
3020 if ((thread->tid == self) || mono_gc_is_finalizer_thread (thread)) {
3021 //CloseHandle (wait->handles [i]);
3022 wait->threads [i] = NULL; /* ignore this thread in next loop */
3026 ensure_synch_cs_set (thread);
3028 EnterCriticalSection (thread->synch_cs);
3030 if (thread->suspended_event == NULL) {
3031 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3032 if (thread->suspended_event == NULL) {
3033 /* Forget this one and go on to the next */
3034 LeaveCriticalSection (thread->synch_cs);
3039 if ((thread->state & ThreadState_Suspended) != 0 ||
3040 (thread->state & ThreadState_StopRequested) != 0 ||
3041 (thread->state & ThreadState_Stopped) != 0) {
3042 LeaveCriticalSection (thread->synch_cs);
3043 CloseHandle (wait->handles [i]);
3044 wait->threads [i] = NULL; /* ignore this thread in next loop */
3048 if ((thread->state & ThreadState_SuspendRequested) == 0)
3049 signal_suspend = TRUE;
3051 events [eventidx++] = thread->suspended_event;
3053 /* Convert abort requests into suspend requests */
3054 if ((thread->state & ThreadState_AbortRequested) != 0)
3055 thread->state &= ~ThreadState_AbortRequested;
3057 thread->state |= ThreadState_SuspendRequested;
3059 LeaveCriticalSection (thread->synch_cs);
3061 /* Signal the thread to suspend */
3063 signal_thread_state_change (thread);
3067 WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3068 for (i = 0; i < wait->num; ++i) {
3069 MonoThread *thread = wait->threads [i];
3074 EnterCriticalSection (thread->synch_cs);
3075 if ((thread->state & ThreadState_Suspended) != 0) {
3076 CloseHandle (thread->suspended_event);
3077 thread->suspended_event = NULL;
3079 LeaveCriticalSection (thread->synch_cs);
3083 * If there are threads which are starting up, we wait until they
3084 * are suspended when they try to register in the threads hash.
3085 * This is guaranteed to finish, since the threads which can create new
3086 * threads get suspended after a while.
3087 * FIXME: The finalizer thread can still create new threads.
3089 mono_threads_lock ();
3090 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3091 mono_threads_unlock ();
3105 collect_threads (gpointer key, gpointer value, gpointer user_data)
3107 MonoThread *thread = (MonoThread*)value;
3108 struct wait_data *wait = (struct wait_data*)user_data;
3111 if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3112 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3116 wait->handles [wait->num] = handle;
3117 wait->threads [wait->num] = thread;
3123 * mono_threads_request_thread_dump:
3125 * Ask all threads except the current to print their stacktrace to stdout.
3128 mono_threads_request_thread_dump (void)
3130 struct wait_data *wait = g_new0 (struct wait_data, 1);
3134 * Make a copy of the hashtable since we can't do anything with
3135 * threads while threads_mutex is held.
3137 mono_threads_lock ();
3138 mono_g_hash_table_foreach (threads, collect_threads, wait);
3139 mono_threads_unlock ();
3141 for (i = 0; i < wait->num; ++i) {
3142 MonoThread *thread = wait->threads [i];
3144 if (!mono_gc_is_finalizer_thread (thread) && (thread != mono_thread_current ()) && !thread->thread_dump_requested) {
3145 thread->thread_dump_requested = TRUE;
3147 signal_thread_state_change (thread);
3150 CloseHandle (wait->handles [i]);
3155 * mono_thread_push_appdomain_ref:
3157 * Register that the current thread may have references to objects in domain
3158 * @domain on its stack. Each call to this function should be paired with a
3159 * call to pop_appdomain_ref.
3162 mono_thread_push_appdomain_ref (MonoDomain *domain)
3164 MonoThread *thread = mono_thread_current ();
3167 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3168 mono_threads_lock ();
3169 thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
3170 mono_threads_unlock ();
3175 mono_thread_pop_appdomain_ref (void)
3177 MonoThread *thread = mono_thread_current ();
3180 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3181 mono_threads_lock ();
3182 /* FIXME: How can the list be empty ? */
3183 if (thread->appdomain_refs)
3184 thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
3185 mono_threads_unlock ();
3190 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3193 mono_threads_lock ();
3194 res = g_slist_find (thread->appdomain_refs, domain) != NULL;
3195 mono_threads_unlock ();
3199 typedef struct abort_appdomain_data {
3200 struct wait_data wait;
3202 } abort_appdomain_data;
3205 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3207 MonoThread *thread = (MonoThread*)value;
3208 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3209 MonoDomain *domain = data->domain;
3211 if (mono_thread_has_appdomain_ref (thread, domain)) {
3212 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3214 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3215 HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3218 data->wait.handles [data->wait.num] = handle;
3219 data->wait.threads [data->wait.num] = thread;
3222 /* Just ignore the rest, we can't do anything with
3230 * mono_threads_abort_appdomain_threads:
3232 * Abort threads which has references to the given appdomain.
3235 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3237 abort_appdomain_data user_data;
3239 int orig_timeout = timeout;
3242 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3244 start_time = mono_msec_ticks ();
3246 mono_threads_lock ();
3248 user_data.domain = domain;
3249 user_data.wait.num = 0;
3250 /* This shouldn't take any locks */
3251 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3252 mono_threads_unlock ();
3254 if (user_data.wait.num > 0) {
3255 /* Abort the threads outside the threads lock */
3256 for (i = 0; i < user_data.wait.num; ++i)
3257 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3260 * We should wait for the threads either to abort, or to leave the
3261 * domain. We can't do the latter, so we wait with a timeout.
3263 wait_for_tids (&user_data.wait, 100);
3266 /* Update remaining time */
3267 timeout -= mono_msec_ticks () - start_time;
3268 start_time = mono_msec_ticks ();
3270 if (orig_timeout != -1 && timeout < 0)
3273 while (user_data.wait.num > 0);
3275 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3281 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3283 MonoThread *thread = (MonoThread*)value;
3284 MonoDomain *domain = (MonoDomain*)user_data;
3287 /* No locking needed here */
3288 /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3290 if (thread->cached_culture_info) {
3291 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3292 MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3293 if (obj && obj->vtable->domain == domain)
3294 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3300 * mono_threads_clear_cached_culture:
3302 * Clear the cached_current_culture from all threads if it is in the
3306 mono_threads_clear_cached_culture (MonoDomain *domain)
3308 mono_threads_lock ();
3309 mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3310 mono_threads_unlock ();
3314 * mono_thread_get_undeniable_exception:
3316 * Return an exception which needs to be raised when leaving a catch clause.
3317 * This is used for undeniable exception propagation.
3320 mono_thread_get_undeniable_exception (void)
3322 MonoThread *thread = mono_thread_current ();
3324 MONO_ARCH_SAVE_REGS;
3326 if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3328 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3329 * exception if the thread no longer references a dying appdomain.
3331 thread->abort_exc->trace_ips = NULL;
3332 thread->abort_exc->stack_trace = NULL;
3333 return thread->abort_exc;
3339 #define NUM_STATIC_DATA_IDX 8
3340 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3341 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3346 * mono_alloc_static_data
3348 * Allocate memory blocks for storing threads or context static data
3351 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset)
3353 guint idx = (offset >> 24) - 1;
3356 gpointer* static_data = *static_data_ptr;
3358 static_data = mono_gc_alloc_fixed (static_data_size [0], NULL);
3359 *static_data_ptr = static_data;
3360 static_data [0] = static_data;
3363 for (i = 1; i <= idx; ++i) {
3364 if (static_data [i])
3366 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3371 * mono_init_static_data_info
3373 * Initializes static data counters
3375 static void mono_init_static_data_info (StaticDataInfo *static_data)
3377 static_data->idx = 0;
3378 static_data->offset = 0;
3379 static_data->freelist = NULL;
3383 * mono_alloc_static_data_slot
3385 * Generates an offset for static data. static_data contains the counters
3386 * used to generate it.
3389 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3393 if (!static_data->idx && !static_data->offset) {
3395 * we use the first chunk of the first allocation also as
3396 * an array for the rest of the data
3398 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3400 static_data->offset += align - 1;
3401 static_data->offset &= ~(align - 1);
3402 if (static_data->offset + size >= static_data_size [static_data->idx]) {
3403 static_data->idx ++;
3404 g_assert (size <= static_data_size [static_data->idx]);
3405 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3406 static_data->offset = 0;
3408 offset = static_data->offset | ((static_data->idx + 1) << 24);
3409 static_data->offset += size;
3414 * ensure thread static fields already allocated are valid for thread
3415 * This function is called when a thread is created or on thread attach.
3418 thread_adjust_static_data (MonoThread *thread)
3422 mono_threads_lock ();
3423 if (thread_static_info.offset || thread_static_info.idx > 0) {
3424 /* get the current allocated size */
3425 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3426 mono_alloc_static_data (&(thread->static_data), offset);
3428 mono_threads_unlock ();
3432 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3434 MonoThread *thread = value;
3435 guint32 offset = GPOINTER_TO_UINT (user);
3437 mono_alloc_static_data (&(thread->static_data), offset);
3440 static MonoThreadDomainTls*
3441 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3443 MonoThreadDomainTls* prev = NULL;
3444 MonoThreadDomainTls* tmp = static_data->freelist;
3446 if (tmp->size == size) {
3448 prev->next = tmp->next;
3450 static_data->freelist = tmp->next;
3459 * The offset for a special static variable is composed of three parts:
3460 * a bit that indicates the type of static data (0:thread, 1:context),
3461 * an index in the array of chunks of memory for the thread (thread->static_data)
3462 * and an offset in that chunk of mem. This allows allocating less memory in the
3467 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align)
3470 if (static_type == SPECIAL_STATIC_THREAD)
3472 MonoThreadDomainTls *item;
3473 mono_threads_lock ();
3474 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3475 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3477 offset = item->offset;
3480 offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3482 /* This can be called during startup */
3483 if (threads != NULL)
3484 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3485 mono_threads_unlock ();
3489 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3490 mono_contexts_lock ();
3491 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3492 mono_contexts_unlock ();
3493 offset |= 0x80000000; /* Set the high bit to indicate context static data */
3499 mono_get_special_static_data (guint32 offset)
3501 /* The high bit means either thread (0) or static (1) data. */
3503 guint32 static_type = (offset & 0x80000000);
3506 offset &= 0x7fffffff;
3507 idx = (offset >> 24) - 1;
3509 if (static_type == 0)
3511 MonoThread *thread = mono_thread_current ();
3512 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3516 /* Allocate static data block under demand, since we don't have a list
3519 MonoAppContext *context = mono_context_get ();
3520 if (!context->static_data || !context->static_data [idx]) {
3521 mono_contexts_lock ();
3522 mono_alloc_static_data (&(context->static_data), offset);
3523 mono_contexts_unlock ();
3525 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3535 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3537 MonoThread *thread = value;
3538 TlsOffsetSize *data = user;
3539 int idx = (data->offset >> 24) - 1;
3542 if (!thread->static_data || !thread->static_data [idx])
3544 ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3545 memset (ptr, 0, data->size);
3549 do_free_special (gpointer key, gpointer value, gpointer data)
3551 MonoClassField *field = key;
3552 guint32 offset = GPOINTER_TO_UINT (value);
3553 guint32 static_type = (offset & 0x80000000);
3556 size = mono_type_size (field->type, &align);
3557 /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3558 if (static_type == 0) {
3560 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3561 data.offset = offset & 0x7fffffff;
3563 if (threads != NULL)
3564 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3565 item->offset = offset;
3567 item->next = thread_static_info.freelist;
3568 thread_static_info.freelist = item;
3570 /* FIXME: free context static data as well */
3575 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3577 mono_threads_lock ();
3578 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3579 mono_threads_unlock ();
3582 static MonoClassField *local_slots = NULL;
3585 /* local tls data to get locals_slot from a thread */
3588 /* index in the locals_slot array */
3593 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3595 LocalSlotID *sid = user_data;
3596 MonoThread *thread = (MonoThread*)value;
3597 MonoArray *slots_array;
3599 * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3600 * it is for the right domain, so we need to check if it is allocated an initialized
3601 * for the current thread.
3603 /*g_print ("handling thread %p\n", thread);*/
3604 if (!thread->static_data || !thread->static_data [sid->idx])
3606 slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3607 if (!slots_array || sid->slot >= mono_array_length (slots_array))
3609 mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3613 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3621 local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3623 g_warning ("local_slots field not found in Thread class");
3627 domain = mono_domain_get ();
3628 mono_domain_lock (domain);
3629 if (domain->special_static_fields)
3630 addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3631 mono_domain_unlock (domain);
3634 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3635 sid.offset = GPOINTER_TO_UINT (addr);
3636 sid.offset &= 0x7fffffff;
3637 sid.idx = (sid.offset >> 24) - 1;
3638 mono_threads_lock ();
3639 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3640 mono_threads_unlock ();
3642 /* FIXME: clear the slot for MonoAppContexts, too */
3646 #ifdef PLATFORM_WIN32
3647 static void CALLBACK dummy_apc (ULONG_PTR param)
3651 static guint32 dummy_apc (gpointer param)
3658 * mono_thread_execute_interruption
3660 * Performs the operation that the requested thread state requires (abort,
3663 static MonoException* mono_thread_execute_interruption (MonoThread *thread)
3665 ensure_synch_cs_set (thread);
3667 EnterCriticalSection (thread->synch_cs);
3669 if (thread->interruption_requested) {
3670 /* this will consume pending APC calls */
3671 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
3672 InterlockedDecrement (&thread_interruption_requested);
3673 thread->interruption_requested = FALSE;
3674 #ifndef PLATFORM_WIN32
3675 /* Clear the interrupted flag of the thread so it can wait again */
3676 wapi_clear_interruption ();
3680 if ((thread->state & ThreadState_AbortRequested) != 0) {
3681 if (thread->abort_exc == NULL)
3682 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
3683 LeaveCriticalSection (thread->synch_cs);
3684 return thread->abort_exc;
3686 else if ((thread->state & ThreadState_SuspendRequested) != 0) {
3687 thread->state &= ~ThreadState_SuspendRequested;
3688 thread->state |= ThreadState_Suspended;
3689 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3690 if (thread->suspend_event == NULL) {
3691 LeaveCriticalSection (thread->synch_cs);
3694 if (thread->suspended_event)
3695 SetEvent (thread->suspended_event);
3697 LeaveCriticalSection (thread->synch_cs);
3699 if (shutting_down) {
3700 /* After we left the lock, the runtime might shut down so everything becomes invalid */
3705 WaitForSingleObject (thread->suspend_event, INFINITE);
3707 EnterCriticalSection (thread->synch_cs);
3709 CloseHandle (thread->suspend_event);
3710 thread->suspend_event = NULL;
3711 thread->state &= ~ThreadState_Suspended;
3713 /* The thread that requested the resume will have replaced this event
3714 * and will be waiting for it
3716 SetEvent (thread->resume_event);
3718 LeaveCriticalSection (thread->synch_cs);
3722 else if ((thread->state & ThreadState_StopRequested) != 0) {
3723 /* FIXME: do this through the JIT? */
3725 LeaveCriticalSection (thread->synch_cs);
3727 mono_thread_exit ();
3729 } else if (thread->thread_interrupt_requested) {
3731 thread->thread_interrupt_requested = FALSE;
3732 LeaveCriticalSection (thread->synch_cs);
3734 return(mono_get_exception_thread_interrupted ());
3737 LeaveCriticalSection (thread->synch_cs);
3743 * mono_thread_request_interruption
3745 * A signal handler can call this method to request the interruption of a
3746 * thread. The result of the interruption will depend on the current state of
3747 * the thread. If the result is an exception that needs to be throw, it is
3748 * provided as return value.
3751 mono_thread_request_interruption (gboolean running_managed)
3753 MonoThread *thread = mono_thread_current ();
3755 /* The thread may already be stopping */
3759 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
3762 if (!running_managed || is_running_protected_wrapper ()) {
3763 /* Can't stop while in unmanaged code. Increase the global interruption
3764 request count. When exiting the unmanaged method the count will be
3765 checked and the thread will be interrupted. */
3767 InterlockedIncrement (&thread_interruption_requested);
3769 if (mono_thread_notify_pending_exc_fn && !running_managed)
3770 /* The JIT will notify the thread about the interruption */
3771 /* This shouldn't take any locks */
3772 mono_thread_notify_pending_exc_fn ();
3774 /* this will awake the thread if it is in WaitForSingleObject
3776 /* Our implementation of this function ignores the func argument */
3777 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
3781 return mono_thread_execute_interruption (thread);
3785 gboolean mono_thread_interruption_requested ()
3787 if (thread_interruption_requested) {
3788 MonoThread *thread = mono_thread_current ();
3789 /* The thread may already be stopping */
3791 return (thread->interruption_requested);
3796 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
3798 MonoThread *thread = mono_thread_current ();
3800 /* The thread may already be stopping */
3804 mono_debugger_check_interruption ();
3806 if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
3807 MonoException* exc = mono_thread_execute_interruption (thread);
3808 if (exc) mono_raise_exception (exc);
3813 * Performs the interruption of the current thread, if one has been requested,
3814 * and the thread is not running a protected wrapper.
3816 void mono_thread_interruption_checkpoint ()
3818 mono_thread_interruption_checkpoint_request (FALSE);
3822 * Performs the interruption of the current thread, if one has been requested.
3824 void mono_thread_force_interruption_checkpoint ()
3826 mono_thread_interruption_checkpoint_request (TRUE);
3830 * mono_thread_get_and_clear_pending_exception:
3832 * Return any pending exceptions for the current thread and clear it as a side effect.
3835 mono_thread_get_and_clear_pending_exception (void)
3837 MonoThread *thread = mono_thread_current ();
3839 /* The thread may already be stopping */
3843 if (thread->interruption_requested && !is_running_protected_wrapper ()) {
3844 return mono_thread_execute_interruption (thread);
3847 if (thread->pending_exception) {
3848 MonoException *exc = thread->pending_exception;
3850 thread->pending_exception = NULL;
3858 * mono_set_pending_exception:
3860 * Set the pending exception of the current thread to EXC. On platforms which
3861 * support it, the exception will be thrown when execution returns to managed code.
3862 * On other platforms, this function is equivalent to mono_raise_exception ().
3863 * Internal calls which report exceptions using this function instead of
3864 * raise_exception () might be called by JITted code using a more efficient calling
3868 mono_set_pending_exception (MonoException *exc)
3870 MonoThread *thread = mono_thread_current ();
3872 /* The thread may already be stopping */
3876 if (mono_thread_notify_pending_exc_fn) {
3877 MONO_OBJECT_SETREF (thread, pending_exception, exc);
3879 mono_thread_notify_pending_exc_fn ();
3881 /* No way to notify the JIT about the exception, have to throw it now */
3882 mono_raise_exception (exc);
3887 * mono_thread_interruption_request_flag:
3889 * Returns the address of a flag that will be non-zero if an interruption has
3890 * been requested for a thread. The thread to interrupt may not be the current
3891 * thread, so an additional call to mono_thread_interruption_requested() or
3892 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
3895 gint32* mono_thread_interruption_request_flag ()
3897 return &thread_interruption_requested;
3901 mono_thread_init_apartment_state (void)
3904 thread = mono_thread_current ();
3906 #ifdef PLATFORM_WIN32
3907 /* Positive return value indicates success, either
3908 * S_OK if this is first CoInitialize call, or
3909 * S_FALSE if CoInitialize already called, but with same
3910 * threading model. A negative value indicates failure,
3911 * probably due to trying to change the threading model.
3913 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
3914 ? COINIT_APARTMENTTHREADED
3915 : COINIT_MULTITHREADED) < 0) {
3916 thread->apartment_state = ThreadApartmentState_Unknown;
3922 mono_thread_cleanup_apartment_state (void)
3924 #ifdef PLATFORM_WIN32
3926 thread = mono_thread_current ();
3928 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
3935 mono_thread_set_state (MonoThread *thread, MonoThreadState state)
3937 ensure_synch_cs_set (thread);
3939 EnterCriticalSection (thread->synch_cs);
3940 thread->state |= state;
3941 LeaveCriticalSection (thread->synch_cs);
3945 mono_thread_clr_state (MonoThread *thread, MonoThreadState state)
3947 ensure_synch_cs_set (thread);
3949 EnterCriticalSection (thread->synch_cs);
3950 thread->state &= ~state;
3951 LeaveCriticalSection (thread->synch_cs);
3955 mono_thread_test_state (MonoThread *thread, MonoThreadState test)
3957 gboolean ret = FALSE;
3959 ensure_synch_cs_set (thread);
3961 EnterCriticalSection (thread->synch_cs);
3963 if ((thread->state & test) != 0) {
3967 LeaveCriticalSection (thread->synch_cs);
3972 static MonoClassField *execution_context_field;
3975 get_execution_context_addr (void)
3977 MonoDomain *domain = mono_domain_get ();
3980 if (!execution_context_field) {
3981 execution_context_field = mono_class_get_field_from_name (mono_defaults.thread_class,
3983 g_assert (execution_context_field);
3986 g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
3988 mono_domain_lock (domain);
3989 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, execution_context_field));
3990 mono_domain_unlock (domain);
3993 return (MonoObject**) mono_get_special_static_data (offset);
3997 mono_thread_get_execution_context (void)
3999 return *get_execution_context_addr ();
4003 mono_thread_set_execution_context (MonoObject *ec)
4005 *get_execution_context_addr () = ec;