*
* 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-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)*/
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 */
return InterlockedIncrement (&managed_thread_id_counter);
}
-guint32
+MonoNativeTlsKey
mono_thread_get_tls_key (void)
{
return current_object_key;
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 ())
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
internal->apartment_state=ThreadApartmentState_Unknown;
internal->thread_pinning_ref = internal;
internal->managed_id = get_next_managed_thread_id ();
- MONO_GC_REGISTER_ROOT (internal->thread_pinning_ref);
+ MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
InitializeCriticalSection (internal->synch_cs);
if (handle_store (thread))
ResumeThread (thread_handle);
+ /* Check that the managed and unmanaged layout of MonoInternalThread matches */
+ g_assert (((char*)&internal->unused2 - (char*)internal) == mono_defaults.internal_thread_class->fields [mono_defaults.internal_thread_class->field.count - 1].offset);
+
return internal;
}
#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->apartment_state=ThreadApartmentState_Unknown;
thread->thread_pinning_ref = thread;
thread->managed_id = get_next_managed_thread_id ();
- MONO_GC_REGISTER_ROOT (thread->thread_pinning_ref);
+ MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref);
thread->stack_ptr = &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->handle=thread;
internal->tid=tid;
internal->thread_pinning_ref = internal;
- MONO_GC_REGISTER_ROOT (internal->thread_pinning_ref);
+ MONO_GC_REGISTER_ROOT_PINNING (internal->thread_pinning_ref);
/* Don't call handle_store() here, delay it to Start.
}
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(FALSE);
}
+static gint32
+mono_wait_uninterrupted (MonoInternalThread *thread, gboolean multiple, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, gboolean alertable)
+{
+ MonoException *exc;
+ guint32 ret;
+ gint64 start;
+ gint32 diff_ms;
+ gint32 wait = ms;
+
+ start = (ms == -1) ? 0 : mono_100ns_ticks ();
+ do {
+ if (multiple)
+ ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, alertable);
+ else
+ ret = WaitForSingleObjectEx (handles [0], ms, alertable);
+
+ if (ret != WAIT_IO_COMPLETION)
+ break;
+
+ exc = mono_thread_execute_interruption (thread);
+ if (exc)
+ mono_raise_exception (exc);
+
+ if (ms == -1)
+ continue;
+
+ /* Re-calculate ms according to the time passed */
+ diff_ms = (mono_100ns_ticks () - start) / 10000;
+ if (diff_ms >= ms) {
+ ret = WAIT_TIMEOUT;
+ break;
+ }
+ wait = ms - diff_ms;
+ } while (TRUE);
+
+ return ret;
+}
+
/* FIXME: exitContext isnt documented */
gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
{
mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
- ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
+ ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, TRUE, ms, TRUE);
mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
if(ret==WAIT_FAILED) {
THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
return(FALSE);
- } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
- /* Do we want to try again if we get
- * WAIT_IO_COMPLETION? The documentation for
- * WaitHandle doesn't give any clues. (We'd have to
- * fiddle with the timeout if we retry.)
- */
+ } else if(ret==WAIT_TIMEOUT) {
THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
return(FALSE);
}
guint32 i;
MonoObject *waitHandle;
MonoInternalThread *thread = mono_thread_internal_current ();
- guint32 start;
/* Do this WaitSleepJoin check before creating objects */
mono_thread_current_check_pending_interrupt ();
mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
- start = (ms == -1) ? 0 : mono_msec_ticks ();
- do {
- ret = WaitForMultipleObjectsEx (numhandles, handles, FALSE, ms, TRUE);
- if (ret != WAIT_IO_COMPLETION)
- break;
- if (ms != -1) {
- guint32 diff;
-
- diff = mono_msec_ticks () - start;
- ms -= diff;
- if (ms <= 0)
- break;
- }
- } while (ms == -1 || ms > 0);
+ ret = mono_wait_uninterrupted (thread, TRUE, numhandles, handles, FALSE, ms, TRUE);
mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
- ret=WaitForSingleObjectEx (handle, ms, TRUE);
+ ret = mono_wait_uninterrupted (thread, FALSE, 1, &handle, FALSE, ms, TRUE);
mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
if(ret==WAIT_FAILED) {
THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
return(FALSE);
- } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
- /* Do we want to try again if we get
- * WAIT_IO_COMPLETION? The documentation for
- * WaitHandle doesn't give any clues. (We'd have to
- * fiddle with the timeout if we retry.)
- */
+ } else if(ret==WAIT_TIMEOUT) {
THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
return(FALSE);
}
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) {
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_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;
CloseHandle (background_change_event);
#endif
- TlsFree (current_object_key);
+ mono_native_tls_free (current_object_key);
}
void
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);
}
}
static void
-update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int max_set)
+update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int numbits)
{
int i;
int idx = (offset >> 24) - 1;
offset &= 0xffffff;
offset /= sizeof (gpointer);
/* offset is now the bitmap offset */
- for (i = 0; i < max_set; ++i) {
+ for (i = 0; i < numbits; ++i) {
if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
}
*/
guint32
-mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int max_set)
+mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
{
guint32 offset;
if (static_type == SPECIAL_STATIC_THREAD) {
} else {
offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
}
- update_tls_reference_bitmap (offset, bitmap, max_set);
+ update_tls_reference_bitmap (offset, bitmap, numbits);
/* This can be called during startup */
if (threads != NULL)
mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
/* 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 + 1);
if (bitmap != default_bitmap)
g_free (bitmap);
tlsrec = g_new0 (MonoTlsDataRecord, 1);
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);
}
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);
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
* functions in the io-layer until the signal handler calls QueueUserAPC which will
* make it return.
*/
- InterlockedIncrement (&thread_interruption_requested);
+#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_interrupt_thread (thread->handle);
+ 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*/
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)
- wapi_interrupt_thread (thread->handle);
+ 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);
}
}