*
* 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 <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>
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);
return InterlockedIncrement (&managed_thread_id_counter);
}
-guint32
+MonoNativeTlsKey
mono_thread_get_tls_key (void)
{
return current_object_key;
}
mono_release_type_locks (thread);
+ ensure_synch_cs_set (thread);
+
EnterCriticalSection (thread->synch_cs);
thread->state |= ThreadState_Stopped;
#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
#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 */
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
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_thread_smr_init ();
-
InitializeCriticalSection(&threads_mutex);
InitializeCriticalSection(&interlocked_mutex);
InitializeCriticalSection(&contexts_mutex);
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
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));
/*
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
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) {
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;
+ }
+
+ 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.
+ */
+ 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_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