*
* Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
* Copyright 2004-2009 Novell, Inc (http://www.novell.com)
+ * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
*/
#include <config.h>
#include <signal.h>
#include <string.h>
-#if defined(__OpenBSD__)
+#if defined(__OpenBSD__) || defined(__FreeBSD__)
#include <pthread.h>
#include <pthread_np.h>
#endif
#include <mono/utils/mono-mmap.h>
#include <mono/utils/mono-membar.h>
#include <mono/utils/mono-time.h>
+#include <mono/utils/mono-threads.h>
+#include <mono/utils/hazard-pointer.h>
+#include <mono/utils/mono-tls.h>
#include <mono/metadata/gc-internal.h>
extern int tkill (pid_t tid, int signal);
#endif
+#if defined(PLATFORM_MACOSX) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
+void *pthread_get_stackaddr_np(pthread_t);
+size_t pthread_get_stacksize_np(pthread_t);
+#endif
+
/*#define THREAD_DEBUG(a) do { a; } while (0)*/
#define THREAD_DEBUG(a)
/*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
MonoThreadDomainTls *freelist;
} StaticDataInfo;
-typedef struct {
- gpointer p;
- MonoHazardousFreeFunc free_func;
-} DelayedFreeItem;
-
/* Number of cached culture objects in the MonoThread->cached_culture_info array
* (per-type): we use the first NUM entries for CultureInfo and the last for
* UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
static MonoGHashTable *thread_start_args = NULL;
/* The TLS key that holds the MonoObject assigned to each thread */
-static guint32 current_object_key = -1;
+static MonoNativeTlsKey current_object_key;
#ifdef MONO_HAVE_FAST_TLS
/* we need to use both the Tls* functions and __thread because
MONO_FAST_TLS_DECLARE(tls_current_object);
#define SET_CURRENT_OBJECT(x) do { \
MONO_FAST_TLS_SET (tls_current_object, x); \
- TlsSetValue (current_object_key, x); \
+ mono_native_tls_set_value (current_object_key, x); \
} while (FALSE)
#define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
#else
-#define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x)
-#define GET_CURRENT_OBJECT() (MonoInternalThread*) TlsGetValue (current_object_key)
+#define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
+#define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
#endif
/* function called at thread start */
static gboolean mono_thread_resume (MonoInternalThread* thread);
static void mono_thread_start (MonoThread *thread);
static void signal_thread_state_change (MonoInternalThread *thread);
+static void abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort);
+static void suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt);
+static void self_suspend_internal (MonoInternalThread *thread);
+static gboolean resume_thread_internal (MonoInternalThread *thread);
static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
+static void ref_stack_destroy (gpointer rs);
/* Spin lock for InterlockedXXX 64 bit functions */
#define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
/* Event signaled when a thread changes its background mode */
static HANDLE background_change_event;
-/* The table for small ID assignment */
-static CRITICAL_SECTION small_id_mutex;
-static int small_id_table_size = 0;
-static int small_id_next = 0;
-static int highest_small_id = -1;
-static MonoInternalThread **small_id_table = NULL;
-
-/* The hazard table */
-#if MONO_SMALL_CONFIG
-#define HAZARD_TABLE_MAX_SIZE 256
-#else
-#define HAZARD_TABLE_MAX_SIZE 16384 /* There cannot be more threads than this number. */
-#endif
-static volatile int hazard_table_size = 0;
-static MonoThreadHazardPointers * volatile hazard_table = NULL;
+static gboolean shutting_down = FALSE;
-/* The table where we keep pointers to blocks to be freed but that
- have to wait because they're guarded by a hazard pointer. */
-static CRITICAL_SECTION delayed_free_table_mutex;
-static GArray *delayed_free_table = NULL;
+static gint32 managed_thread_id_counter = 0;
-static gboolean shutting_down = FALSE;
+static guint32
+get_next_managed_thread_id (void)
+{
+ return InterlockedIncrement (&managed_thread_id_counter);
+}
-guint32
+MonoNativeTlsKey
mono_thread_get_tls_key (void)
{
return current_object_key;
{
mono_threads_lock ();
- THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->tid));
+ THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->internal_thread->tid));
if (threads_starting_up)
mono_g_hash_table_remove (threads_starting_up, thread);
return ret;
}
-/*
- * Allocate a small thread id.
- *
- * FIXME: The biggest part of this function is very similar to
- * domain_id_alloc() in domain.c and should be merged.
- */
-static int
-small_id_alloc (MonoInternalThread *thread)
-{
- int id = -1, i;
-
- EnterCriticalSection (&small_id_mutex);
-
- if (!small_id_table) {
- small_id_table_size = 2;
- /*
- * Enabling this causes problems, because SGEN doesn't track/update the TLS slot holding
- * the current thread.
- */
- //small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoInternalThread*), mono_gc_make_root_descr_all_refs (small_id_table_size));
- small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoInternalThread*), NULL);
- }
- for (i = small_id_next; i < small_id_table_size; ++i) {
- if (!small_id_table [i]) {
- id = i;
- break;
- }
- }
- if (id == -1) {
- for (i = 0; i < small_id_next; ++i) {
- if (!small_id_table [i]) {
- id = i;
- break;
- }
- }
- }
- if (id == -1) {
- MonoInternalThread **new_table;
- int new_size = small_id_table_size * 2;
- if (new_size >= (1 << 16))
- g_assert_not_reached ();
- id = small_id_table_size;
- //new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoInternalThread*), mono_gc_make_root_descr_all_refs (new_size));
- new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoInternalThread*), NULL);
- memcpy (new_table, small_id_table, small_id_table_size * sizeof (void*));
- mono_gc_free_fixed (small_id_table);
- small_id_table = new_table;
- small_id_table_size = new_size;
- }
- thread->small_id = id;
- g_assert (small_id_table [id] == NULL);
- small_id_table [id] = thread;
- small_id_next++;
- if (small_id_next > small_id_table_size)
- small_id_next = 0;
-
- g_assert (id < HAZARD_TABLE_MAX_SIZE);
- if (id >= hazard_table_size) {
-#if MONO_SMALL_CONFIG
- hazard_table = g_malloc0 (sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE);
- hazard_table_size = HAZARD_TABLE_MAX_SIZE;
-#else
- gpointer page_addr;
- int pagesize = mono_pagesize ();
- int num_pages = (hazard_table_size * sizeof (MonoThreadHazardPointers) + pagesize - 1) / pagesize;
-
- if (hazard_table == NULL) {
- hazard_table = mono_valloc (NULL,
- sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE,
- MONO_MMAP_NONE);
- }
-
- g_assert (hazard_table != NULL);
- page_addr = (guint8*)hazard_table + num_pages * pagesize;
-
- mono_mprotect (page_addr, pagesize, MONO_MMAP_READ | MONO_MMAP_WRITE);
-
- ++num_pages;
- hazard_table_size = num_pages * pagesize / sizeof (MonoThreadHazardPointers);
-
-#endif
- g_assert (id < hazard_table_size);
- hazard_table [id].hazard_pointers [0] = NULL;
- hazard_table [id].hazard_pointers [1] = NULL;
- }
-
- if (id > highest_small_id) {
- highest_small_id = id;
- mono_memory_write_barrier ();
- }
-
- LeaveCriticalSection (&small_id_mutex);
-
- return id;
-}
-
-static void
-small_id_free (int id)
-{
- g_assert (id >= 0 && id < small_id_table_size);
- g_assert (small_id_table [id] != NULL);
-
- small_id_table [id] = NULL;
-}
-
-static gboolean
-is_pointer_hazardous (gpointer p)
-{
- int i;
- int highest = highest_small_id;
-
- g_assert (highest < hazard_table_size);
-
- for (i = 0; i <= highest; ++i) {
- if (hazard_table [i].hazard_pointers [0] == p
- || hazard_table [i].hazard_pointers [1] == p)
- return TRUE;
- }
-
- return FALSE;
-}
-
-MonoThreadHazardPointers*
-mono_hazard_pointer_get (void)
-{
- MonoInternalThread *current_thread = mono_thread_internal_current ();
-
- if (!(current_thread && current_thread->small_id >= 0)) {
- static MonoThreadHazardPointers emerg_hazard_table;
- g_warning ("Thread %p may have been prematurely finalized", current_thread);
- return &emerg_hazard_table;
- }
-
- return &hazard_table [current_thread->small_id];
-}
-
-static void
-try_free_delayed_free_item (int index)
-{
- if (delayed_free_table->len > index) {
- DelayedFreeItem item = { NULL, NULL };
-
- EnterCriticalSection (&delayed_free_table_mutex);
- /* We have to check the length again because another
- thread might have freed an item before we acquired
- the lock. */
- if (delayed_free_table->len > index) {
- item = g_array_index (delayed_free_table, DelayedFreeItem, index);
-
- if (!is_pointer_hazardous (item.p))
- g_array_remove_index_fast (delayed_free_table, index);
- else
- item.p = NULL;
- }
- LeaveCriticalSection (&delayed_free_table_mutex);
-
- if (item.p != NULL)
- item.free_func (item.p);
- }
-}
-
-void
-mono_thread_hazardous_free_or_queue (gpointer p, MonoHazardousFreeFunc free_func)
-{
- int i;
-
- /* First try to free a few entries in the delayed free
- table. */
- for (i = 2; i >= 0; --i)
- try_free_delayed_free_item (i);
-
- /* Now see if the pointer we're freeing is hazardous. If it
- isn't, free it. Otherwise put it in the delay list. */
- if (is_pointer_hazardous (p)) {
- DelayedFreeItem item = { p, free_func };
-
- ++mono_stats.hazardous_pointer_count;
-
- EnterCriticalSection (&delayed_free_table_mutex);
- g_array_append_val (delayed_free_table, item);
- LeaveCriticalSection (&delayed_free_table_mutex);
- } else
- free_func (p);
-}
-
-void
-mono_thread_hazardous_try_free_all (void)
-{
- int len;
- int i;
-
- if (!delayed_free_table)
- return;
-
- len = delayed_free_table->len;
-
- for (i = len - 1; i >= 0; --i)
- try_free_delayed_free_item (i);
-}
-
static void ensure_synch_cs_set (MonoInternalThread *thread)
{
CRITICAL_SECTION *synch_cs;
mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
}
+ ensure_synch_cs_set (thread);
+
+ EnterCriticalSection (thread->synch_cs);
+
+ thread->state |= ThreadState_Stopped;
+ thread->state &= ~ThreadState_Background;
+
+ LeaveCriticalSection (thread->synch_cs);
+
+ /*
+ An interruption request has leaked to cleanup. Adjust the global counter.
+
+ This can happen is the abort source thread finds the abortee (this) thread
+ in unmanaged code. If this thread never trips back to managed code or check
+ the local flag it will be left set and positively unbalance the global counter.
+
+ Leaving the counter unbalanced will cause a performance degradation since all threads
+ will now keep checking their local flags all the time.
+ */
+ if (InterlockedExchange (&thread->interruption_requested, 0))
+ InterlockedDecrement (&thread_interruption_requested);
+
/* if the thread is not in the hash it has been removed already */
if (!handle_remove (thread)) {
/* This needs to be called even if handle_remove () fails */
}
mono_release_type_locks (thread);
- EnterCriticalSection (thread->synch_cs);
-
- thread->state |= ThreadState_Stopped;
- thread->state &= ~ThreadState_Background;
-
- LeaveCriticalSection (thread->synch_cs);
-
mono_profiler_thread_end (thread->tid);
if (thread == mono_thread_internal_current ())
mono_free_static_data (thread->static_data, TRUE);
thread->static_data = NULL;
+ ref_stack_destroy (thread->appdomain_refs);
+ thread->appdomain_refs = NULL;
if (mono_thread_cleanup_fn)
mono_thread_cleanup_fn (thread);
- small_id_free (thread->small_id);
- thread->small_id = -2;
-
+ MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
}
static gpointer
static guint32 WINAPI start_wrapper_internal(void *data)
{
+ MonoThreadInfo *info;
struct StartInfo *start_info=(struct StartInfo *)data;
guint32 (*start_func)(void *);
void *start_arg;
* thread resumed
*/
+ info = mono_thread_info_current ();
+ g_assert (info);
+ internal->thread_info = info;
+
+
tid=internal->tid;
SET_CURRENT_OBJECT (internal);
LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
- THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
+ THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), internal));
/* On 2.0 profile (and higher), set explicitly since state might have been
Unknown */
start_info->obj->ec_to_set = NULL;
g_free (start_info);
-#ifdef DEBUG
- g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
- thread->tid);
-#endif
+ THREAD_DEBUG (g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
+ internal->tid));
/*
* Call this after calling start_notify, since the profiler callback might want
static guint32 WINAPI start_wrapper(void *data)
{
-#ifdef HAVE_SGEN_GC
volatile int dummy;
/* Avoid scanning the frames above this frame during a GC */
mono_gc_set_stack_end ((void*)&dummy);
-#endif
return start_wrapper_internal (data);
}
#ifdef HOST_WIN32
DWORD real_tid;
- res = CreateThread (security, stacksize, start, param, create, &real_tid);
+ res = mono_threads_CreateThread (security, stacksize, start, param, create, &real_tid);
if (tid)
*tid = real_tid;
#else
mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
}
-MonoInternalThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread)
+MonoInternalThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size)
{
MonoThread *thread;
MonoInternalThread *internal;
mono_g_hash_table_insert (threads_starting_up, thread, thread);
mono_threads_unlock ();
+ if (stack_size == 0)
+ stack_size = default_stacksize_for_thread (internal);
+
/* Create suspended, so we can do some housekeeping before the thread
* starts
*/
- thread_handle = mono_create_thread (NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
+ thread_handle = mono_create_thread (NULL, stack_size, (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
CREATE_SUSPENDED, &tid);
THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
if (thread_handle == NULL) {
internal->handle=thread_handle;
internal->tid=tid;
internal->apartment_state=ThreadApartmentState_Unknown;
- small_id_alloc (internal);
+ internal->thread_pinning_ref = internal;
+ internal->managed_id = get_next_managed_thread_id ();
+ MONO_GC_REGISTER_ROOT (internal->thread_pinning_ref);
internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
InitializeCriticalSection (internal->synch_cs);
void
mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
{
- mono_thread_create_internal (domain, func, arg, FALSE);
+ mono_thread_create_internal (domain, func, arg, FALSE, 0);
}
/*
#if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
*staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
*stsize = pthread_get_stacksize_np (pthread_self ());
+
+ /* staddr points to the start of the stack, not the end */
+ *staddr -= *stsize;
*staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
return;
/* FIXME: simplify the mess below */
thread->android_tid = (gpointer) gettid ();
#endif
thread->apartment_state=ThreadApartmentState_Unknown;
- small_id_alloc (thread);
+ thread->thread_pinning_ref = thread;
+ thread->managed_id = get_next_managed_thread_id ();
+ MONO_GC_REGISTER_ROOT (thread->thread_pinning_ref);
+
thread->stack_ptr = &tid;
thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
{
g_return_if_fail (thread != NULL);
- THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
+ THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->internal_thread->tid));
+ mono_profiler_thread_end (thread->internal_thread->tid);
+
thread_cleanup (thread->internal_thread);
SET_CURRENT_OBJECT (NULL);
internal->state = ThreadState_Unstarted;
internal->apartment_state = ThreadApartmentState_Unknown;
+ internal->managed_id = get_next_managed_thread_id ();
InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
}
return NULL;
}
- internal->small_id = -1;
-
if ((internal->state & ThreadState_Aborted) != 0) {
LeaveCriticalSection (internal->synch_cs);
return this;
internal->handle=thread;
internal->tid=tid;
- small_id_alloc (internal);
+ internal->thread_pinning_ref = internal;
+ MONO_GC_REGISTER_ROOT (internal->thread_pinning_ref);
+
/* Don't call handle_store() here, delay it to Start.
* We can't join a thread (trying to will just block
CloseHandle (thread);
if (this->synch_cs) {
- DeleteCriticalSection (this->synch_cs);
- g_free (this->synch_cs);
+ CRITICAL_SECTION *synch_cs = this->synch_cs;
this->synch_cs = NULL;
+ DeleteCriticalSection (synch_cs);
+ g_free (synch_cs);
}
- g_free (this->name);
+ if (this->name) {
+ void *name = this->name;
+ this->name = NULL;
+ g_free (name);
+ }
}
static void mono_thread_start (MonoThread *thread)
{
MonoInternalThread *internal = thread->internal_thread;
- THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
+ THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
/* Only store the handle when the thread is about to be
* launched, to avoid the main thread deadlocking while trying
* started
*/
- THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
+ THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
CloseHandle (internal->start_notify);
internal->start_notify = NULL;
}
- THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
+ THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), internal, (gsize)internal->tid));
}
void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
mono_thread_current_check_pending_interrupt ();
- mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
+ while (TRUE) {
+ mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
- res = SleepEx(ms,TRUE);
+ res = SleepEx(ms,TRUE);
- mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
-
- if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
- MonoException* exc = mono_thread_execute_interruption (thread);
- if (exc) mono_raise_exception (exc);
+ mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
+
+ if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
+ MonoException* exc = mono_thread_execute_interruption (thread);
+ if (exc) {
+ mono_raise_exception (exc);
+ } else {
+ // FIXME: !INFINITE
+ if (ms != INFINITE)
+ break;
+ }
+ } else {
+ break;
+ }
}
}
}
void
-ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
+mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean managed)
{
ensure_synch_cs_set (this_obj);
EnterCriticalSection (this_obj->synch_cs);
-
- if (this_obj->name) {
+
+ if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
LeaveCriticalSection (this_obj->synch_cs);
mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
}
else
this_obj->name = NULL;
+
+ if (managed)
+ this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
LeaveCriticalSection (this_obj->synch_cs);
if (this_obj->name) {
}
}
+void
+ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
+{
+ mono_thread_set_name_internal (this_obj, name, TRUE);
+}
+
/* If the array is already in the requested domain, we just return it,
otherwise we return a copy in that domain. */
static MonoArray*
return arr;
copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
- memcpy (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
+ mono_gc_memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
return copy;
}
void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
{
- gboolean throw = FALSE;
-
+ MonoInternalThread *current;
+ gboolean throw;
+
ensure_synch_cs_set (this);
- if (this == mono_thread_internal_current ())
- return;
-
- EnterCriticalSection (this->synch_cs);
-
- this->thread_interrupt_requested = TRUE;
-
- if (this->state & ThreadState_WaitSleepJoin) {
- throw = TRUE;
- }
-
+ current = mono_thread_internal_current ();
+
+ EnterCriticalSection (this->synch_cs);
+
+ this->thread_interrupt_requested = TRUE;
+ throw = current != this && (this->state & ThreadState_WaitSleepJoin);
+
LeaveCriticalSection (this->synch_cs);
if (throw) {
- signal_thread_state_change (this);
+ abort_thread_internal (this, TRUE, FALSE);
}
}
/* Make sure the thread is awake */
mono_thread_resume (thread);
- signal_thread_state_change (thread);
+ abort_thread_internal (thread, TRUE, TRUE);
}
void
LeaveCriticalSection (thread->synch_cs);
- signal_thread_state_change (thread);
+ suspend_thread_internal (thread, FALSE);
return TRUE;
}
LeaveCriticalSection (thread->synch_cs);
return FALSE;
}
-
- thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
- if (thread->resume_event == NULL) {
- LeaveCriticalSection (thread->synch_cs);
- return(FALSE);
- }
-
- /* Awake the thread */
- SetEvent (thread->suspend_event);
- LeaveCriticalSection (thread->synch_cs);
-
- /* Wait for the thread to awake */
- WaitForSingleObject (thread->resume_event, INFINITE);
- CloseHandle (thread->resume_event);
- thread->resume_event = NULL;
-
- return TRUE;
+ return resume_thread_internal (thread);
}
void
mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
}
+static gboolean
+mono_threads_is_critical_method (MonoMethod *method)
+{
+ switch (method->wrapper_type) {
+ case MONO_WRAPPER_RUNTIME_INVOKE:
+ case MONO_WRAPPER_XDOMAIN_INVOKE:
+ case MONO_WRAPPER_XDOMAIN_DISPATCH:
+ return TRUE;
+ }
+ return FALSE;
+}
+
static gboolean
find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
{
if (managed)
return TRUE;
- if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
- m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
- m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
- {
+ if (mono_threads_is_critical_method (m)) {
*((gboolean*)data) = TRUE;
return TRUE;
}
LeaveCriticalSection (thread->synch_cs);
- signal_thread_state_change (thread);
+ abort_thread_internal (thread, TRUE, TRUE);
}
void mono_thread_stop (MonoThread *thread)
return (void *) *((volatile void **) ptr);
}
+double
+ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
+{
+ return *((volatile double *) (ptr));
+}
+
+float
+ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
+{
+ return *((volatile float *) (ptr));
+}
+
void
ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
{
mono_gc_wbarrier_generic_store (ptr, value);
}
+void
+ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
+{
+ *((volatile double *) ptr) = value;
+}
+
+void
+ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
+{
+ *((volatile float *) ptr) = value;
+}
+
void mono_thread_init (MonoThreadStartCB start_cb,
MonoThreadAttachCB attach_cb)
{
- MONO_GC_REGISTER_ROOT_FIXED (small_id_table);
InitializeCriticalSection(&threads_mutex);
InitializeCriticalSection(&interlocked_mutex);
InitializeCriticalSection(&contexts_mutex);
- InitializeCriticalSection(&delayed_free_table_mutex);
- InitializeCriticalSection(&small_id_mutex);
background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
g_assert(background_change_event != NULL);
mono_init_static_data_info (&context_static_info);
MONO_FAST_TLS_INIT (tls_current_object);
- current_object_key=TlsAlloc();
+ mono_native_tls_alloc (¤t_object_key, NULL);
THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
mono_thread_start_cb = start_cb;
mono_thread_attach_cb = attach_cb;
- delayed_free_table = g_array_new (FALSE, FALSE, sizeof (DelayedFreeItem));
-
/* Get a pseudo handle to the current process. This is just a
* kludge so that wapi can build a process handle if needed.
* As a pseudo handle is returned, we don't need to clean
void mono_thread_cleanup (void)
{
- mono_thread_hazardous_try_free_all ();
-
#if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
/* The main thread must abandon any held mutexes (particularly
* important for named mutexes as they are shared across
CloseHandle (background_change_event);
#endif
- g_array_free (delayed_free_table, TRUE);
- delayed_free_table = NULL;
-
- TlsFree (current_object_key);
+ mono_native_tls_free (current_object_key);
}
void
LeaveCriticalSection (thread->synch_cs);
/* Signal the thread to suspend */
- if (signal_suspend)
+ if (mono_thread_info_new_interrupt_enabled ())
+ suspend_thread_internal (thread, TRUE);
+ else if (signal_suspend)
signal_thread_state_change (thread);
}
- if (eventidx > 0) {
+ /*Only wait on the suspend event if we are using the old path */
+ if (eventidx > 0 && !mono_thread_info_new_interrupt_enabled ()) {
WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
for (i = 0; i < wait->num; ++i) {
MonoInternalThread *thread = wait->threads [i];
}
LeaveCriticalSection (thread->synch_cs);
}
- } else {
+ }
+
+ if (eventidx <= 0) {
/*
* If there are threads which are starting up, we wait until they
* are suspended when they try to register in the threads hash.
}
}
+static gboolean thread_dump_requested;
+
+static G_GNUC_UNUSED gboolean
+print_stack_frame_to_string (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
+{
+ GString *p = (GString*)data;
+ MonoMethod *method = NULL;
+ if (frame->ji)
+ method = frame->ji->method;
+
+ if (method) {
+ gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
+ g_string_append_printf (p, " %s\n", location);
+ g_free (location);
+ } else
+ g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
+
+ return FALSE;
+}
+
+static void
+print_thread_dump (MonoInternalThread *thread, MonoThreadInfo *info)
+{
+ GString* text = g_string_new (0);
+ char *name;
+ GError *error = NULL;
+
+ if (thread->name) {
+ name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
+ g_assert (!error);
+ g_string_append_printf (text, "\n\"%s\"", name);
+ g_free (name);
+ }
+ else if (thread->threadpool_thread)
+ g_string_append (text, "\n\"<threadpool thread>\"");
+ else
+ g_string_append (text, "\n\"<unnamed thread>\"");
+
+#if 0
+/* This no longer works with remote unwinding */
+#ifndef HOST_WIN32
+ wapi_desc = wapi_current_thread_desc ();
+ g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
+ free (wapi_desc);
+#endif
+#endif
+
+ mono_get_eh_callbacks ()->mono_walk_stack_with_state (print_stack_frame_to_string, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, text);
+ mono_thread_info_resume (mono_thread_info_get_tid (info));
+
+ fprintf (stdout, "%s", text->str);
+
+#if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
+ OutputDebugStringA(text->str);
+#endif
+
+ g_string_free (text, TRUE);
+ fflush (stdout);
+}
+
+static void
+dump_thread (gpointer key, gpointer value, gpointer user)
+{
+ MonoInternalThread *thread = (MonoInternalThread *)value;
+ MonoThreadInfo *info;
+
+ if (thread == mono_thread_internal_current ())
+ return;
+
+ /*
+ FIXME This still can hang if we stop a thread during malloc.
+ FIXME This can hang if we suspend on a critical method and the GC kicks in. A fix might be to have function
+ that takes a callback and runs it with the target suspended.
+ We probably should loop a bit around trying to get it to either managed code
+ or WSJ state.
+ */
+ info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gpointer)(gsize)thread->tid, FALSE);
+
+ if (!info)
+ return;
+
+ print_thread_dump (thread, info);
+}
+
+void
+mono_threads_perform_thread_dump (void)
+{
+ if (!thread_dump_requested)
+ return;
+
+ printf ("Full thread dump:\n");
+
+ /*
+ * Make a copy of the hashtable since we can't do anything with
+ * threads while threads_mutex is held.
+ */
+ mono_threads_lock ();
+ mono_g_hash_table_foreach (threads, dump_thread, NULL);
+ mono_threads_unlock ();
+
+ thread_dump_requested = FALSE;
+}
+
/**
* mono_threads_request_thread_dump:
*
struct wait_data *wait = &wait_data;
int i;
+ /*The new thread dump code runs out of the finalizer thread. */
+ if (mono_thread_info_new_interrupt_enabled ()) {
+ thread_dump_requested = TRUE;
+ mono_gc_finalize_notify ();
+ return;
+ }
+
+
memset (wait, 0, sizeof (struct wait_data));
/*
}
}
+struct ref_stack {
+ gpointer *refs;
+ gint allocated; /* +1 so that refs [allocated] == NULL */
+ gint bottom;
+};
+
+typedef struct ref_stack RefStack;
+
+static RefStack *
+ref_stack_new (gint initial_size)
+{
+ RefStack *rs;
+
+ initial_size = MAX (initial_size, 16) + 1;
+ rs = g_new0 (RefStack, 1);
+ rs->refs = g_new0 (gpointer, initial_size);
+ rs->allocated = initial_size;
+ return rs;
+}
+
+static void
+ref_stack_destroy (gpointer ptr)
+{
+ RefStack *rs = ptr;
+
+ if (rs != NULL) {
+ g_free (rs->refs);
+ g_free (rs);
+ }
+}
+
+static void
+ref_stack_push (RefStack *rs, gpointer ptr)
+{
+ g_assert (rs != NULL);
+
+ if (rs->bottom >= rs->allocated) {
+ rs->refs = g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
+ rs->allocated <<= 1;
+ rs->refs [rs->allocated] = NULL;
+ }
+ rs->refs [rs->bottom++] = ptr;
+}
+
+static void
+ref_stack_pop (RefStack *rs)
+{
+ if (rs == NULL || rs->bottom == 0)
+ return;
+
+ rs->bottom--;
+ rs->refs [rs->bottom] = NULL;
+}
+
+static gboolean
+ref_stack_find (RefStack *rs, gpointer ptr)
+{
+ gpointer *refs;
+
+ if (rs == NULL)
+ return FALSE;
+
+ for (refs = rs->refs; refs && *refs; refs++) {
+ if (*refs == ptr)
+ return TRUE;
+ }
+ return FALSE;
+}
+
/*
* mono_thread_push_appdomain_ref:
*
if (thread) {
/* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
SPIN_LOCK (thread->lock_thread_id);
- thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
+ if (thread->appdomain_refs == NULL)
+ thread->appdomain_refs = ref_stack_new (16);
+ ref_stack_push (thread->appdomain_refs, domain);
SPIN_UNLOCK (thread->lock_thread_id);
}
}
if (thread) {
/* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
- /* FIXME: How can the list be empty ? */
SPIN_LOCK (thread->lock_thread_id);
- if (thread->appdomain_refs)
- thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
+ ref_stack_pop (thread->appdomain_refs);
SPIN_UNLOCK (thread->lock_thread_id);
}
}
{
gboolean res;
SPIN_LOCK (thread->lock_thread_id);
- res = g_slist_find (thread->appdomain_refs, domain) != NULL;
+ res = ref_stack_find (thread->appdomain_refs, domain);
SPIN_UNLOCK (thread->lock_thread_id);
return res;
}
static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
-#ifdef HAVE_SGEN_GC
static void
mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
{
}
}
}
-#endif
/*
* mono_alloc_static_data
gpointer* static_data = *static_data_ptr;
if (!static_data) {
static void* tls_desc = NULL;
-#ifdef HAVE_SGEN_GC
- if (!tls_desc)
+ if (mono_gc_user_markers_supported () && !tls_desc)
tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
-#endif
static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
*static_data_ptr = static_data;
static_data [0] = static_data;
for (i = 1; i <= idx; ++i) {
if (static_data [i])
continue;
-#ifdef HAVE_SGEN_GC
- static_data [i] = threadlocal?g_malloc0 (static_data_size [i]):mono_gc_alloc_fixed (static_data_size [i], NULL);
-#else
- static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
-#endif
+ if (mono_gc_user_markers_supported () && threadlocal)
+ static_data [i] = g_malloc0 (static_data_size [i]);
+ else
+ static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
}
}
for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
if (!static_data [i])
continue;
-#ifdef HAVE_SGEN_GC
- if (threadlocal)
+ if (mono_gc_user_markers_supported () && threadlocal)
g_free (static_data [i]);
else
mono_gc_free_fixed (static_data [i]);
-#else
- mono_gc_free_fixed (static_data [i]);
-#endif
}
mono_gc_free_fixed (static_data);
}
if (!thread->static_data || !thread->static_data [idx])
return;
ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
- memset (ptr, 0, data->size);
+ mono_gc_bzero (ptr, data->size);
}
static void
/* TlsDatum is a struct, so we subtract the object header size offset */
bitmap = mono_class_compute_bitmap (klass, default_bitmap, sizeof (default_bitmap) * 8, - (int)(sizeof (MonoObject) / sizeof (gpointer)), &max_set, FALSE);
size = mono_type_size (type->type, &align);
- tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, bitmap, max_set);
+ tls_offset = mono_alloc_special_static_data (SPECIAL_STATIC_THREAD, size, align, (uintptr_t*)bitmap, max_set);
if (bitmap != default_bitmap)
g_free (bitmap);
tlsrec = g_new0 (MonoTlsDataRecord, 1);
return thread->abort_exc;
}
else if ((thread->state & ThreadState_SuspendRequested) != 0) {
- thread->state &= ~ThreadState_SuspendRequested;
- thread->state |= ThreadState_Suspended;
- thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
- if (thread->suspend_event == NULL) {
- LeaveCriticalSection (thread->synch_cs);
- return(NULL);
- }
- if (thread->suspended_event)
- SetEvent (thread->suspended_event);
-
- LeaveCriticalSection (thread->synch_cs);
-
- if (shutting_down) {
- /* After we left the lock, the runtime might shut down so everything becomes invalid */
- for (;;)
- Sleep (1000);
- }
-
- WaitForSingleObject (thread->suspend_event, INFINITE);
-
- EnterCriticalSection (thread->synch_cs);
-
- CloseHandle (thread->suspend_event);
- thread->suspend_event = NULL;
- thread->state &= ~ThreadState_Suspended;
-
- /* The thread that requested the resume will have replaced this event
- * and will be waiting for it
- */
- SetEvent (thread->resume_event);
-
- LeaveCriticalSection (thread->synch_cs);
-
+ self_suspend_internal (thread);
return NULL;
}
else if ((thread->state & ThreadState_StopRequested) != 0) {
mono_thread_exit ();
return NULL;
+ } else if (thread->pending_exception) {
+ MonoException *exc;
+
+ exc = thread->pending_exception;
+ thread->pending_exception = NULL;
+
+ LeaveCriticalSection (thread->synch_cs);
+ return exc;
} else if (thread->thread_interrupt_requested) {
thread->thread_interrupt_requested = FALSE;
if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
return NULL;
+ InterlockedIncrement (&thread_interruption_requested);
if (!running_managed || is_running_protected_wrapper ()) {
/* Can't stop while in unmanaged code. Increase the global interruption
request count. When exiting the unmanaged method the count will be
checked and the thread will be interrupted. */
- InterlockedIncrement (&thread_interruption_requested);
if (mono_thread_notify_pending_exc_fn && !running_managed)
/* The JIT will notify the thread about the interruption */
/*
* mono_set_pending_exception:
*
- * Set the pending exception of the current thread to EXC. On platforms which
- * support it, the exception will be thrown when execution returns to managed code.
- * On other platforms, this function is equivalent to mono_raise_exception ().
- * Internal calls which report exceptions using this function instead of
- * raise_exception () might be called by JITted code using a more efficient calling
- * convention.
+ * Set the pending exception of the current thread to EXC.
+ * The exception will be thrown when execution returns to managed code.
*/
void
mono_set_pending_exception (MonoException *exc)
if (thread == NULL)
return;
- if (mono_thread_notify_pending_exc_fn) {
- MONO_OBJECT_SETREF (thread, pending_exception, exc);
+ MONO_OBJECT_SETREF (thread, pending_exception, exc);
- mono_thread_notify_pending_exc_fn ();
- } else {
- /* No way to notify the JIT about the exception, have to throw it now */
- mono_raise_exception (exc);
- }
+ mono_thread_request_interruption (FALSE);
}
/**
return ret;
}
-static MonoClassField *execution_context_field;
+//static MonoClassField *execution_context_field;
static MonoObject**
get_execution_context_addr (void)
{
MonoDomain *domain = mono_domain_get ();
- guint32 offset;
+ guint32 offset = domain->execution_context_field_offset;
- if (!execution_context_field) {
- execution_context_field = mono_class_get_field_from_name (mono_defaults.thread_class,
- "_ec");
- g_assert (execution_context_field);
- }
+ if (!offset) {
+ MonoClassField *field = mono_class_get_field_from_name (mono_defaults.thread_class, "_ec");
+ g_assert (field);
- g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
+ g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
- mono_domain_lock (domain);
- offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, execution_context_field));
- mono_domain_unlock (domain);
- g_assert (offset);
+ mono_domain_lock (domain);
+ offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, field));
+ mono_domain_unlock (domain);
+ g_assert (offset);
+
+ domain->execution_context_field_offset = offset;
+ }
return (MonoObject**) mono_get_special_static_data (offset);
}
# endif
#endif
}
+
+static void
+self_interrupt_thread (void *_unused)
+{
+ MonoThreadInfo *info = mono_thread_info_current ();
+ MonoException *exc = mono_thread_execute_interruption (mono_thread_internal_current ());
+ if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
+ mono_raise_exception_with_context (exc, &info->suspend_state.ctx);
+ g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
+}
+
+static gboolean
+mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
+{
+ if (!ji)
+ return FALSE;
+ return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
+}
+
+static gboolean
+last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
+{
+ MonoJitInfo **dest = data;
+ *dest = frame->ji;
+ return TRUE;
+}
+
+static MonoJitInfo*
+mono_thread_info_get_last_managed (MonoThreadInfo *info)
+{
+ MonoJitInfo *ji = NULL;
+ mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, &info->suspend_state, MONO_UNWIND_SIGNAL_SAFE, &ji);
+ return ji;
+}
+
+static void
+abort_thread_internal (MonoInternalThread *thread, gboolean can_raise_exception, gboolean install_async_abort)
+{
+ MonoJitInfo *ji;
+ MonoThreadInfo *info = NULL;
+ gboolean protected_wrapper;
+ gboolean running_managed;
+
+ if (!mono_thread_info_new_interrupt_enabled ()) {
+ signal_thread_state_change (thread);
+ return;
+ }
+
+ /*
+ FIXME this is insanely broken, it doesn't cause interruption to happen
+ synchronously since passing FALSE to mono_thread_request_interruption makes sure it returns NULL
+ */
+ if (thread == mono_thread_internal_current ()) {
+ /* Do it synchronously */
+ MonoException *exc = mono_thread_request_interruption (can_raise_exception);
+ if (exc)
+ mono_raise_exception (exc);
+#ifndef HOST_WIN32
+ wapi_interrupt_thread (thread->handle);
+#endif
+ return;
+ }
+
+ /*FIXME we need to check 2 conditions here, request to interrupt this thread or if the target died*/
+ if (!(info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, TRUE))) {
+ return;
+ }
+
+ if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (&info->suspend_state)) {
+ mono_thread_info_resume (mono_thread_info_get_tid (info));
+ return;
+ }
+
+ /*someone is already interrupting it*/
+ if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1) {
+ mono_thread_info_resume (mono_thread_info_get_tid (info));
+ return;
+ }
+ InterlockedIncrement (&thread_interruption_requested);
+
+ ji = mono_thread_info_get_last_managed (info);
+ protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
+ running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
+
+ if (!protected_wrapper && running_managed) {
+ /*We are in managed code*/
+ /*Set the thread to call */
+ if (install_async_abort)
+ mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
+ mono_thread_info_resume (mono_thread_info_get_tid (info));
+ } else {
+ gpointer interrupt_handle;
+ /*
+ * This will cause waits to be broken.
+ * It will also prevent the thread from entering a wait, so if the thread returns
+ * from the wait before it receives the abort signal, it will just spin in the wait
+ * functions in the io-layer until the signal handler calls QueueUserAPC which will
+ * make it return.
+ */
+#ifndef HOST_WIN32
+ interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
+#endif
+ mono_thread_info_resume (mono_thread_info_get_tid (info));
+#ifndef HOST_WIN32
+ wapi_finish_interrupt_thread (interrupt_handle);
+#endif
+ }
+ /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
+}
+
+static void
+transition_to_suspended (MonoInternalThread *thread)
+{
+ if ((thread->state & ThreadState_SuspendRequested) == 0) {
+ g_assert (0); /*FIXME we should not reach this */
+ /*Make sure we balance the suspend count.*/
+ mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid);
+ } else {
+ thread->state &= ~ThreadState_SuspendRequested;
+ thread->state |= ThreadState_Suspended;
+ }
+ LeaveCriticalSection (thread->synch_cs);
+}
+
+static void
+suspend_thread_internal (MonoInternalThread *thread, gboolean interrupt)
+{
+ if (!mono_thread_info_new_interrupt_enabled ()) {
+ signal_thread_state_change (thread);
+ return;
+ }
+
+ EnterCriticalSection (thread->synch_cs);
+ if (thread == mono_thread_internal_current ()) {
+ transition_to_suspended (thread);
+ mono_thread_info_self_suspend ();
+ } else {
+ MonoThreadInfo *info = mono_thread_info_safe_suspend_sync ((MonoNativeThreadId)(gsize)thread->tid, interrupt);
+ MonoJitInfo *ji = mono_thread_info_get_last_managed (info);
+ gboolean protected_wrapper = ji && mono_threads_is_critical_method (ji->method);
+ gboolean running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&info->suspend_state.ctx));
+
+ if (running_managed && !protected_wrapper) {
+ transition_to_suspended (thread);
+ } else {
+ gpointer interrupt_handle;
+
+ if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
+ InterlockedIncrement (&thread_interruption_requested);
+#ifndef HOST_WIN32
+ if (interrupt)
+ interrupt_handle = wapi_prepare_interrupt_thread (thread->handle);
+#endif
+ mono_thread_info_resume (mono_thread_info_get_tid (info));
+#ifndef HOST_WIN32
+ if (interrupt)
+ wapi_finish_interrupt_thread (interrupt_handle);
+#endif
+ LeaveCriticalSection (thread->synch_cs);
+ }
+ }
+}
+
+/*This is called with @thread synch_cs held and it must release it*/
+static void
+self_suspend_internal (MonoInternalThread *thread)
+{
+ if (!mono_thread_info_new_interrupt_enabled ()) {
+ thread->state &= ~ThreadState_SuspendRequested;
+ thread->state |= ThreadState_Suspended;
+ thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
+ if (thread->suspend_event == NULL) {
+ LeaveCriticalSection (thread->synch_cs);
+ return;
+ }
+ if (thread->suspended_event)
+ SetEvent (thread->suspended_event);
+
+ LeaveCriticalSection (thread->synch_cs);
+
+ if (shutting_down) {
+ /* After we left the lock, the runtime might shut down so everything becomes invalid */
+ for (;;)
+ Sleep (1000);
+ }
+
+ WaitForSingleObject (thread->suspend_event, INFINITE);
+
+ EnterCriticalSection (thread->synch_cs);
+
+ CloseHandle (thread->suspend_event);
+ thread->suspend_event = NULL;
+ thread->state &= ~ThreadState_Suspended;
+
+ /* The thread that requested the resume will have replaced this event
+ * and will be waiting for it
+ */
+ SetEvent (thread->resume_event);
+
+ LeaveCriticalSection (thread->synch_cs);
+ return;
+ }
+
+ transition_to_suspended (thread);
+ mono_thread_info_self_suspend ();
+}
+
+/*This is called with @thread synch_cs held and it must release it*/
+static gboolean
+resume_thread_internal (MonoInternalThread *thread)
+{
+ if (!mono_thread_info_new_interrupt_enabled ()) {
+ thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
+ if (thread->resume_event == NULL) {
+ LeaveCriticalSection (thread->synch_cs);
+ return FALSE;
+ }
+
+ /* Awake the thread */
+ SetEvent (thread->suspend_event);
+
+ LeaveCriticalSection (thread->synch_cs);
+
+ /* Wait for the thread to awake */
+ WaitForSingleObject (thread->resume_event, INFINITE);
+ CloseHandle (thread->resume_event);
+ thread->resume_event = NULL;
+ return TRUE;
+ }
+
+ LeaveCriticalSection (thread->synch_cs);
+ /* Awake the thread */
+ if (!mono_thread_info_resume ((MonoNativeThreadId)(gpointer)(gsize)thread->tid))
+ return FALSE;
+ EnterCriticalSection (thread->synch_cs);
+ thread->state &= ~ThreadState_Suspended;
+ LeaveCriticalSection (thread->synch_cs);
+ return TRUE;
+}
projects / mono.git / blobdiff