SOCKET mono_w32socket_accept (SOCKET s, struct sockaddr *addr, socklen_t *addrlen, gboolean blocking)
{
MonoInternalThread *curthread = mono_thread_internal_current ();
SOCKET newsock = INVALID_SOCKET;
ALERTABLE_SOCKET_CALL (FD_ACCEPT_BIT, blocking, TRUE, newsock, accept, s, addr, addrlen);
return newsock;
}
void
ves_icall_System_GC_WaitForPendingFinalizers (void)
{
#ifndef HAVE_NULL_GC
if (!mono_gc_pending_finalizers ())
return;
if (mono_thread_internal_current () == gc_thread)
/* Avoid deadlocks */
return;
/*
If the finalizer thread is not live, lets pretend no finalizers are pending since the current thread might
be the one responsible for starting it up.
*/
if (gc_thread == NULL)
return;
ResetEvent (pending_done_event);
mono_gc_finalize_notify ();
/* g_print ("Waiting for pending finalizers....\n"); */
WaitForSingleObjectEx (pending_done_event, INFINITE, TRUE);
/* g_print ("Done pending....\n"); */
#endif
}
int mono_w32socket_recv (SOCKET s, char *buf, int len, int flags, gboolean blocking)
{
MonoInternalThread *curthread = mono_thread_internal_current ();
int ret = SOCKET_ERROR;
ALERTABLE_SOCKET_CALL (FD_READ_BIT, blocking, TRUE, ret, recv, s, buf, len, flags);
return ret;
}
static gboolean
mutex_handle_own (MonoW32Handle *handle_data, gboolean *abandoned)
{
MonoW32HandleMutex *mutex_handle;
*abandoned = FALSE;
mutex_handle = (MonoW32HandleMutex*) handle_data->specific;
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_MUTEX, "%s: owning %s handle %p, before: [tid: %p, recursion: %d], after: [tid: %p, recursion: %d], abandoned: %s",
__func__, mono_w32handle_get_typename (handle_data->type), handle_data, (gpointer) mutex_handle->tid, mutex_handle->recursion, (gpointer) pthread_self (), mutex_handle->recursion + 1, mutex_handle->abandoned ? "true" : "false");
if (mutex_handle->recursion != 0) {
g_assert (pthread_equal (pthread_self (), mutex_handle->tid));
mutex_handle->recursion++;
} else {
mutex_handle->tid = pthread_self ();
mutex_handle->recursion = 1;
thread_own_mutex (mono_thread_internal_current (), handle_data, handle_data);
}
if (mutex_handle->abandoned) {
mutex_handle->abandoned = FALSE;
*abandoned = TRUE;
}
mono_w32handle_set_signal_state (handle_data, FALSE, FALSE);
return TRUE;
}
static void
mutex_handle_signal (MonoW32Handle *handle_data)
{
MonoW32HandleMutex *mutex_handle;
pthread_t tid;
mutex_handle = (MonoW32HandleMutex*) handle_data->specific;
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_MUTEX, "%s: signalling %s handle %p, tid: %p recursion: %d",
__func__, mono_w32handle_get_typename (handle_data->type), handle_data, (gpointer) mutex_handle->tid, mutex_handle->recursion);
tid = pthread_self ();
if (mutex_handle->abandoned) {
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_MUTEX, "%s: %s handle %p is abandoned",
__func__, mono_w32handle_get_typename (handle_data->type), handle_data);
} else if (!pthread_equal (mutex_handle->tid, tid)) {
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_MUTEX, "%s: we don't own %s handle %p (owned by %ld, me %ld)",
__func__, mono_w32handle_get_typename (handle_data->type), handle_data, (long)mutex_handle->tid, (long)tid);
} else {
/* OK, we own this mutex */
mutex_handle->recursion--;
if (mutex_handle->recursion == 0) {
thread_disown_mutex (mono_thread_internal_current (), handle_data);
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_MUTEX, "%s: unlocking %s handle %p, tid: %p recusion : %d",
__func__, mono_w32handle_get_typename (handle_data->type), handle_data, (gpointer) mutex_handle->tid, mutex_handle->recursion);
mutex_handle->tid = 0;
mono_w32handle_set_signal_state (handle_data, TRUE, FALSE);
}
}
}
MonoBoolean
ves_icall_System_Threading_Mutex_ReleaseMutex_internal (gpointer handle)
{
MonoW32Handle *handle_data;
MonoW32HandleMutex *mutex_handle;
pthread_t tid;
gboolean ret;
if (!mono_w32handle_lookup_and_ref (handle, &handle_data)) {
g_warning ("%s: unkown handle %p", __func__, handle);
mono_w32error_set_last (ERROR_INVALID_HANDLE);
return FALSE;
}
if (handle_data->type != MONO_W32TYPE_MUTEX && handle_data->type != MONO_W32TYPE_NAMEDMUTEX) {
g_warning ("%s: unknown mutex handle %p", __func__, handle);
mono_w32error_set_last (ERROR_INVALID_HANDLE);
mono_w32handle_unref (handle_data);
return FALSE;
}
mutex_handle = (MonoW32HandleMutex*) handle_data->specific;
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_MUTEX, "%s: releasing %s handle %p, tid: %p recursion: %d",
__func__, mono_w32handle_get_typename (handle_data->type), handle, (gpointer) mutex_handle->tid, mutex_handle->recursion);
mono_w32handle_lock (handle_data);
tid = pthread_self ();
if (mutex_handle->abandoned) {
// The Win32 ReleaseMutex() function returns TRUE for abandoned mutexes
ret = TRUE;
} else if (!pthread_equal (mutex_handle->tid, tid)) {
ret = FALSE;
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_MUTEX, "%s: we don't own %s handle %p (owned by %ld, me %ld)",
__func__, mono_w32handle_get_typename (handle_data->type), handle, (long)mutex_handle->tid, (long)tid);
} else {
ret = TRUE;
/* OK, we own this mutex */
mutex_handle->recursion--;
if (mutex_handle->recursion == 0) {
thread_disown_mutex (mono_thread_internal_current (), handle);
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER_MUTEX, "%s: unlocking %s handle %p, tid: %p recusion : %d",
__func__, mono_w32handle_get_typename (handle_data->type), handle, (gpointer) mutex_handle->tid, mutex_handle->recursion);
mutex_handle->tid = 0;
mono_w32handle_set_signal_state (handle_data, TRUE, FALSE);
}
}
mono_w32handle_unlock (handle_data);
mono_w32handle_unref (handle_data);
return ret;
}
static gboolean
is_ip_in_managed_allocator (MonoDomain *domain, gpointer ip)
{
MonoJitInfo *ji;
if (!mono_thread_internal_current ())
/* Happens during thread attach */
return FALSE;
if (!ip || !domain)
return FALSE;
if (!sgen_has_critical_method ())
return FALSE;
/*
* mono_jit_info_table_find is not async safe since it calls into the AOT runtime to load information for
* missing methods (#13951). To work around this, we disable the AOT fallback. For this to work, the JIT needs
* to register the jit info for all GC critical methods after they are JITted/loaded.
*/
ji = mono_jit_info_table_find_internal (domain, (char *)ip, FALSE, FALSE);
if (!ji)
return FALSE;
return sgen_is_critical_method (mono_jit_info_get_method (ji));
}
static gboolean
mutex_handle_own (gpointer handle, MonoW32HandleType type, gboolean *abandoned)
{
MonoW32HandleMutex *mutex_handle;
*abandoned = FALSE;
if (!mono_w32handle_lookup (handle, type, (gpointer *)&mutex_handle)) {
g_warning ("%s: error looking up %s handle %p", __func__, mono_w32handle_get_typename (type), handle);
return FALSE;
}
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER, "%s: owning %s handle %p, before: [tid: %p, recursion: %d], after: [tid: %p, recursion: %d], abandoned: %s",
__func__, mono_w32handle_get_typename (type), handle, (gpointer) mutex_handle->tid, mutex_handle->recursion, (gpointer) pthread_self (), mutex_handle->recursion + 1, mutex_handle->abandoned ? "true" : "false");
if (mutex_handle->recursion != 0) {
g_assert (pthread_equal (pthread_self (), mutex_handle->tid));
mutex_handle->recursion++;
} else {
mutex_handle->tid = pthread_self ();
mutex_handle->recursion = 1;
thread_own_mutex (mono_thread_internal_current (), handle);
}
if (mutex_handle->abandoned) {
mutex_handle->abandoned = FALSE;
*abandoned = TRUE;
}
mono_w32handle_set_signal_state (handle, FALSE, FALSE);
return TRUE;
}
static void
clear_thread_state (void)
{
MonoInternalThread *thread = mono_thread_internal_current ();
/* If the callee changes the background status, set it back to TRUE */
mono_thread_clr_state (thread , ~ThreadState_Background);
if (!mono_thread_test_state (thread , ThreadState_Background))
ves_icall_System_Threading_Thread_SetState (thread, ThreadState_Background);
}
static void
monitor_thread (gpointer unused)
{
ThreadPool *pools [2];
MonoInternalThread *thread;
guint32 ms;
gboolean need_one;
int i;
pools [0] = &async_tp;
pools [1] = &async_io_tp;
thread = mono_thread_internal_current ();
ves_icall_System_Threading_Thread_SetName_internal (thread, mono_string_new (mono_domain_get (), "Threadpool monitor"));
while (1) {
ms = 500;
i = 10; //number of spurious awakes we tolerate before doing a round of rebalancing.
do {
guint32 ts;
ts = mono_msec_ticks ();
if (SleepEx (ms, TRUE) == 0)
break;
ms -= (mono_msec_ticks () - ts);
if (mono_runtime_is_shutting_down ())
break;
if (THREAD_WANTS_A_BREAK (thread))
mono_thread_interruption_checkpoint ();
} while (ms > 0 && i--);
if (mono_runtime_is_shutting_down ())
break;
if (suspended)
continue;
for (i = 0; i < 2; i++) {
ThreadPool *tp;
tp = pools [i];
if (tp->waiting > 0)
continue;
need_one = (mono_cq_count (tp->queue) > 0);
if (!need_one && !tp->is_io) {
EnterCriticalSection (&wsqs_lock);
for (i = 0; wsqs != NULL && i < wsqs->len; i++) {
MonoWSQ *wsq;
wsq = g_ptr_array_index (wsqs, i);
if (mono_wsq_count (wsq) != 0) {
need_one = TRUE;
break;
}
}
LeaveCriticalSection (&wsqs_lock);
}
if (need_one)
threadpool_start_thread (tp);
}
}
}
static void
set_tp_thread_info (ThreadPool *tp)
{
const gchar *name;
MonoInternalThread *thread = mono_thread_internal_current ();
mono_profiler_thread_start (thread->tid);
name = (tp->is_io) ? "IO Threadpool worker" : "Threadpool worker";
mono_thread_set_name_internal (thread, mono_string_new (mono_domain_get (), name), FALSE);
}
SIG_HANDLER_FUNC (static, sigabrt_signal_handler)
{
MonoJitInfo *ji = NULL;
GET_CONTEXT;
if (mono_thread_internal_current ())
ji = mono_jit_info_table_find (mono_domain_get (), mono_arch_ip_from_context(ctx));
if (!ji) {
if (mono_chain_signal (SIG_HANDLER_PARAMS))
return;
mono_handle_native_sigsegv (SIGABRT, ctx);
}
}
void
check_for_interruption_critical (void)
{
MonoInternalThread *thread;
/*RULE NUMBER ONE OF SKIP_THREAD: NEVER POKE MANAGED STATE.*/
mono_gc_set_skip_thread (FALSE);
thread = mono_thread_internal_current ();
if (THREAD_WANTS_A_BREAK (thread))
mono_thread_interruption_checkpoint ();
/*RULE NUMBER TWO OF SKIP_THREAD: READ RULE NUMBER ONE.*/
mono_gc_set_skip_thread (TRUE);
}
MONO_SIG_HANDLER_FUNC (static, sigabrt_signal_handler)
{
MonoJitInfo *ji = NULL;
MONO_SIG_HANDLER_INFO_TYPE *info = MONO_SIG_HANDLER_GET_INFO ();
MONO_SIG_HANDLER_GET_CONTEXT;
if (mono_thread_internal_current ())
ji = mono_jit_info_table_find_internal (mono_domain_get (), mono_arch_ip_from_context (ctx), TRUE, TRUE);
if (!ji) {
if (mono_chain_signal (MONO_SIG_HANDLER_PARAMS))
return;
mono_handle_native_crash ("SIGABRT", ctx, info);
}
}
void
ves_icall_System_GC_WaitForPendingFinalizers (void)
{
#ifndef HAVE_NULL_GC
if (!mono_gc_pending_finalizers ())
return;
if (mono_thread_internal_current () == gc_thread)
/* Avoid deadlocks */
return;
ResetEvent (pending_done_event);
mono_gc_finalize_notify ();
/* g_print ("Waiting for pending finalizers....\n"); */
WaitForSingleObjectEx (pending_done_event, INFINITE, TRUE);
/* g_print ("Done pending....\n"); */
#endif
}
void
mono_internal_thread_unhandled_exception (MonoObject* exc)
{
if (mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
gboolean unloaded;
MonoClass *klass;
klass = exc->vtable->klass;
unloaded = is_appdomainunloaded_exception (exc->vtable->domain, klass);
if (!unloaded && klass != mono_defaults.threadabortexception_class) {
mono_unhandled_exception (exc);
if (mono_environment_exitcode_get () == 1)
exit (255);
}
if (klass == mono_defaults.threadabortexception_class)
mono_thread_internal_reset_abort (mono_thread_internal_current ());
}
}
static gint
epoll_event_wait (void (*callback) (gint fd, gint events, gpointer user_data), gpointer user_data)
{
gint i, ready;
memset (epoll_events, 0, sizeof (struct epoll_event) * EPOLL_NEVENTS);
mono_gc_set_skip_thread (TRUE);
MONO_ENTER_GC_SAFE;
ready = epoll_wait (epoll_fd, epoll_events, EPOLL_NEVENTS, -1);
MONO_EXIT_GC_SAFE;
mono_gc_set_skip_thread (FALSE);
if (ready == -1) {
switch (errno) {
case EINTR:
mono_thread_internal_check_for_interruption_critical (mono_thread_internal_current ());
ready = 0;
break;
default:
g_error ("epoll_event_wait: epoll_wait () failed, error (%d) %s", errno, g_strerror (errno));
break;
}
}
if (ready == -1)
return -1;
for (i = 0; i < ready; ++i) {
gint fd, events = 0;
fd = epoll_events [i].data.fd;
if (epoll_events [i].events & (EPOLLIN | EPOLLERR | EPOLLHUP))
events |= EVENT_IN;
if (epoll_events [i].events & (EPOLLOUT | EPOLLERR | EPOLLHUP))
events |= EVENT_OUT;
callback (fd, events, user_data);
}
return 0;
}
static gint
kqueue_event_wait (void (*callback) (gint fd, gint events, gpointer user_data), gpointer user_data)
{
gint i, ready;
memset (kqueue_events, 0, sizeof (struct kevent) * KQUEUE_NEVENTS);
mono_gc_set_skip_thread (TRUE);
ready = kevent (kqueue_fd, NULL, 0, kqueue_events, KQUEUE_NEVENTS, NULL);
mono_gc_set_skip_thread (FALSE);
if (ready == -1) {
switch (errno) {
case EINTR:
mono_thread_internal_check_for_interruption_critical (mono_thread_internal_current ());
ready = 0;
break;
default:
g_error ("kqueue_event_wait: kevent () failed, error (%d) %s", errno, g_strerror (errno));
break;
}
}
if (ready == -1)
return -1;
for (i = 0; i < ready; ++i) {
gint fd, events = 0;
fd = kqueue_events [i].ident;
if (kqueue_events [i].filter == EVFILT_READ || (kqueue_events [i].flags & EV_ERROR) != 0)
events |= EVENT_IN;
if (kqueue_events [i].filter == EVFILT_WRITE || (kqueue_events [i].flags & EV_ERROR) != 0)
events |= EVENT_OUT;
callback (fd, events, user_data);
}
return 0;
}
static gint
kqueue_event_wait (void)
{
gint ready;
ready = kevent (kqueue_fd, NULL, 0, kqueue_events, KQUEUE_NEVENTS, NULL);
if (ready == -1) {
switch (errno) {
case EINTR:
mono_thread_internal_check_for_interruption_critical (mono_thread_internal_current ());
ready = 0;
break;
default:
g_warning ("kqueue_event_wait: kevent () failed, error (%d) %s", errno, g_strerror (errno));
break;
}
}
return ready;
}
static gint
epoll_event_wait (void)
{
gint ready;
ready = epoll_wait (epoll_fd, epoll_events, EPOLL_NEVENTS, -1);
if (ready == -1) {
switch (errno) {
case EINTR:
mono_thread_internal_check_for_interruption_critical (mono_thread_internal_current ());
ready = 0;
break;
default:
g_warning ("epoll_event_wait: epoll_wait () failed, error (%d) %s", errno, g_strerror (errno));
break;
}
}
return ready;
}
static gint
poll_event_wait (void (*callback) (gint fd, gint events, gpointer user_data), gpointer user_data)
{
gint i, ready;
for (i = 0; i < poll_fds_size; ++i)
poll_fds [i].revents = 0;
mono_gc_set_skip_thread (TRUE);
MONO_ENTER_GC_SAFE;
ready = mono_poll (poll_fds, poll_fds_size, -1);
MONO_EXIT_GC_SAFE;
mono_gc_set_skip_thread (FALSE);
if (ready == -1) {
/*
* Apart from EINTR, we only check EBADF, for the rest:
* EINVAL: mono_poll() 'protects' us from descriptor
* numbers above the limit if using select() by marking
* then as POLLERR. If a system poll() is being
* used, the number of descriptor we're passing will not
* be over sysconf(_SC_OPEN_MAX), as the error would have
* happened when opening.
*
* EFAULT: we own the memory pointed by pfds.
* ENOMEM: we're doomed anyway
*
*/
#if !defined(HOST_WIN32)
switch (errno)
#else
switch (WSAGetLastError ())
#endif
{
#if !defined(HOST_WIN32)
case EINTR:
#else
case WSAEINTR:
#endif
{
mono_thread_internal_check_for_interruption_critical (mono_thread_internal_current ());
ready = 0;
break;
}
#if !defined(HOST_WIN32)
case EBADF:
#else
case WSAEBADF:
#endif
{
ready = poll_mark_bad_fds (poll_fds, poll_fds_size);
break;
}
default:
#if !defined(HOST_WIN32)
g_error ("poll_event_wait: mono_poll () failed, error (%d) %s", errno, g_strerror (errno));
#else
g_error ("poll_event_wait: mono_poll () failed, error (%d)\n", WSAGetLastError ());
#endif
break;
}
}
if (ready == -1)
return -1;
if (ready == 0)
return 0;
g_assert (ready > 0);
for (i = 0; i < poll_fds_size; ++i) {
gint fd, events = 0;
if (poll_fds [i].fd == -1)
continue;
if (poll_fds [i].revents == 0)
continue;
fd = poll_fds [i].fd;
if (poll_fds [i].revents & (MONO_POLLIN | MONO_POLLERR | MONO_POLLHUP | MONO_POLLNVAL))
events |= EVENT_IN;
if (poll_fds [i].revents & (MONO_POLLOUT | MONO_POLLERR | MONO_POLLHUP | MONO_POLLNVAL))
events |= EVENT_OUT;
if (poll_fds [i].revents & (MONO_POLLERR | MONO_POLLHUP | MONO_POLLNVAL))
events |= EVENT_ERR;
callback (fd, events, user_data);
if (--ready == 0)
break;
}
return 0;
}
static void
SIG_HANDLER_SIGNATURE (sigusr1_signal_handler)
{
gboolean running_managed;
MonoException *exc;
MonoInternalThread *thread = mono_thread_internal_current ();
MonoDomain *domain = mono_domain_get ();
void *ji;
GET_CONTEXT;
if (!thread || !domain)
/* The thread might not have started up yet */
/* FIXME: Specify the synchronization with start_wrapper () in threads.c */
return;
if (thread->thread_dump_requested) {
thread->thread_dump_requested = FALSE;
mono_print_thread_dump (ctx);
}
/*
* This is an async signal, so the code below must not call anything which
* is not async safe. That includes the pthread locking functions. If we
* know that we interrupted managed code, then locking is safe.
*/
/*
* On OpenBSD, ctx can be NULL if we are interrupting poll ().
*/
if (ctx) {
ji = mono_jit_info_table_find (mono_domain_get (), mono_arch_ip_from_context(ctx));
running_managed = ji != NULL;
if (mono_debugger_agent_thread_interrupt (ctx, ji))
return;
} else {
running_managed = FALSE;
}
/* We can't do handler block checking from metadata since it requires doing
* a stack walk with context.
*
* FIXME add full-aot support.
*/
#ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
if (!mono_aot_only && ctx) {
MonoThreadUnwindState unwind_state;
if (mono_thread_state_init_from_sigctx (&unwind_state, ctx)) {
if (mono_install_handler_block_guard (&unwind_state)) {
#ifndef HOST_WIN32
/*Clear current thread from been wapi interrupted otherwise things can go south*/
wapi_clear_interruption ();
#endif
return;
}
}
}
#endif
exc = mono_thread_request_interruption (running_managed);
if (!exc)
return;
mono_arch_handle_exception (ctx, exc, FALSE);
}
static void
tp_poll_wait (gpointer p)
{
#if MONO_SMALL_CONFIG
#define INITIAL_POLLFD_SIZE 128
#else
#define INITIAL_POLLFD_SIZE 1024
#endif
#define POLL_ERRORS (MONO_POLLERR | MONO_POLLHUP | MONO_POLLNVAL)
mono_pollfd *pfds;
gint maxfd = 1;
gint allocated;
gint i;
MonoInternalThread *thread;
tp_poll_data *data;
SocketIOData *socket_io_data = p;
gpointer *async_results;
gint nresults;
thread = mono_thread_internal_current ();
data = socket_io_data->event_data;
allocated = INITIAL_POLLFD_SIZE;
pfds = g_new0 (mono_pollfd, allocated);
async_results = g_new0 (gpointer, allocated * 2);
INIT_POLLFD (pfds, data->pipe [0], MONO_POLLIN);
for (i = 1; i < allocated; i++)
INIT_POLLFD (&pfds [i], -1, 0);
while (1) {
int nsock = 0;
mono_pollfd *pfd;
char one [1];
MonoMList *list;
MonoObject *ares;
do {
if (nsock == -1) {
if (THREAD_WANTS_A_BREAK (thread))
mono_thread_interruption_checkpoint ();
}
nsock = mono_poll (pfds, maxfd, -1);
} while (nsock == -1 && errno == EINTR);
/*
* Apart from EINTR, we only check EBADF, for the rest:
* EINVAL: mono_poll() 'protects' us from descriptor
* numbers above the limit if using select() by marking
* then as MONO_POLLERR. If a system poll() is being
* used, the number of descriptor we're passing will not
* be over sysconf(_SC_OPEN_MAX), as the error would have
* happened when opening.
*
* EFAULT: we own the memory pointed by pfds.
* ENOMEM: we're doomed anyway
*
*/
if (nsock == -1 && errno == EBADF) {
pfds->revents = 0; /* Just in case... */
nsock = mark_bad_fds (pfds, maxfd);
}
if ((pfds->revents & POLL_ERRORS) != 0) {
/* We're supposed to die now, as the pipe has been closed */
g_free (pfds);
g_free (async_results);
socket_io_cleanup (socket_io_data);
return;
}
/* Got a new socket */
if ((pfds->revents & MONO_POLLIN) != 0) {
int nread;
for (i = 1; i < allocated; i++) {
pfd = &pfds [i];
if (pfd->fd == -1 || pfd->fd == data->newpfd.fd)
break;
}
if (i == allocated) {
mono_pollfd *oldfd;
oldfd = pfds;
i = allocated;
allocated = allocated * 2;
pfds = g_renew (mono_pollfd, oldfd, allocated);
g_free (oldfd);
for (; i < allocated; i++)
INIT_POLLFD (&pfds [i], -1, 0);
async_results = g_renew (gpointer, async_results, allocated * 2);
}
#ifndef HOST_WIN32
nread = read (data->pipe [0], one, 1);
#else
nread = recv ((SOCKET) data->pipe [0], one, 1, 0);
#endif
if (nread <= 0) {
g_free (pfds);
g_free (async_results);
return; /* we're closed */
}
INIT_POLLFD (&pfds [i], data->newpfd.fd, data->newpfd.events);
memset (&data->newpfd, 0, sizeof (mono_pollfd));
MONO_SEM_POST (&data->new_sem);
if (i >= maxfd)
maxfd = i + 1;
nsock--;
}
if (nsock == 0)
continue;
EnterCriticalSection (&socket_io_data->io_lock);
if (socket_io_data->inited == 3) {
g_free (pfds);
g_free (async_results);
LeaveCriticalSection (&socket_io_data->io_lock);
return; /* cleanup called */
}
nresults = 0;
for (i = 1; i < maxfd && nsock > 0; i++) {
pfd = &pfds [i];
if (pfd->fd == -1 || pfd->revents == 0)
continue;
nsock--;
list = mono_g_hash_table_lookup (socket_io_data->sock_to_state, GINT_TO_POINTER (pfd->fd));
if (list != NULL && (pfd->revents & (MONO_POLLIN | POLL_ERRORS)) != 0) {
ares = get_io_event (&list, MONO_POLLIN);
if (ares != NULL)
async_results [nresults++] = ares;
}
if (list != NULL && (pfd->revents & (MONO_POLLOUT | POLL_ERRORS)) != 0) {
ares = get_io_event (&list, MONO_POLLOUT);
if (ares != NULL)
async_results [nresults++] = ares;
}
if (list != NULL) {
mono_g_hash_table_replace (socket_io_data->sock_to_state, GINT_TO_POINTER (pfd->fd), list);
pfd->events = get_events_from_list (list);
} else {
mono_g_hash_table_remove (socket_io_data->sock_to_state, GINT_TO_POINTER (pfd->fd));
pfd->fd = -1;
if (i == maxfd - 1)
maxfd--;
}
}
LeaveCriticalSection (&socket_io_data->io_lock);
threadpool_append_jobs (&async_io_tp, (MonoObject **) async_results, nresults);
memset (async_results, 0, sizeof (gpointer) * nresults);
}
}
gboolean
mono_domain_finalize (MonoDomain *domain, guint32 timeout)
{
DomainFinalizationReq *req;
guint32 res;
HANDLE done_event;
MonoInternalThread *thread = mono_thread_internal_current ();
if (mono_thread_internal_current () == gc_thread)
/* We are called from inside a finalizer, not much we can do here */
return FALSE;
/*
* No need to create another thread 'cause the finalizer thread
* is still working and will take care of running the finalizers
*/
#ifndef HAVE_NULL_GC
if (gc_disabled)
return TRUE;
mono_gc_collect (mono_gc_max_generation ());
done_event = CreateEvent (NULL, TRUE, FALSE, NULL);
if (done_event == NULL) {
return FALSE;
}
req = g_new0 (DomainFinalizationReq, 1);
req->domain = domain;
req->done_event = done_event;
if (domain == mono_get_root_domain ())
finalizing_root_domain = TRUE;
mono_finalizer_lock ();
domains_to_finalize = g_slist_append (domains_to_finalize, req);
mono_finalizer_unlock ();
/* Tell the finalizer thread to finalize this appdomain */
mono_gc_finalize_notify ();
if (timeout == -1)
timeout = INFINITE;
while (TRUE) {
res = WaitForSingleObjectEx (done_event, timeout, TRUE);
/* printf ("WAIT RES: %d.\n", res); */
if (res == WAIT_IO_COMPLETION) {
if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
return FALSE;
} else if (res == WAIT_TIMEOUT) {
/* We leak the handle here */
return FALSE;
} else {
break;
}
}
CloseHandle (done_event);
if (domain == mono_get_root_domain ()) {
mono_thread_pool_cleanup ();
mono_gc_finalize_threadpool_threads ();
}
return TRUE;
#else
/* We don't support domain finalization without a GC */
return FALSE;
#endif
}
static void
ensure_cleanedup (void)
{
if (status == STATUS_NOT_INITIALIZED && InterlockedCompareExchange (&status, STATUS_CLEANED_UP, STATUS_NOT_INITIALIZED) == STATUS_NOT_INITIALIZED)
return;
if (status == STATUS_INITIALIZING) {
while (status == STATUS_INITIALIZING)
mono_thread_info_yield ();
}
if (status == STATUS_CLEANED_UP)
return;
if (status == STATUS_CLEANING_UP || InterlockedCompareExchange (&status, STATUS_CLEANING_UP, STATUS_INITIALIZED) != STATUS_INITIALIZED) {
while (status == STATUS_CLEANING_UP)
mono_thread_info_yield ();
g_assert (status == STATUS_CLEANED_UP);
return;
}
/* we make the assumption along the code that we are
* cleaning up only if the runtime is shutting down */
g_assert (mono_runtime_is_shutting_down ());
/* Unpark all worker threads */
mono_mutex_lock (&threadpool->parked_threads_lock);
for (;;) {
guint i;
ThreadPoolCounter counter = COUNTER_READ ();
if (counter._.active == 0 && counter._.parked == 0)
break;
if (counter._.active == 1) {
MonoInternalThread *thread = mono_thread_internal_current ();
if (thread->threadpool_thread) {
/* if there is only one active thread
* left and it's the current one */
break;
}
}
for (i = 0; i < threadpool->parked_threads->len; ++i) {
mono_cond_t *cond = (mono_cond_t*) g_ptr_array_index (threadpool->parked_threads, i);
mono_cond_signal (cond);
}
mono_mutex_unlock (&threadpool->parked_threads_lock);
usleep (1000);
mono_mutex_lock (&threadpool->parked_threads_lock);
}
mono_mutex_unlock (&threadpool->parked_threads_lock);
while (monitor_status != MONITOR_STATUS_NOT_RUNNING)
usleep (1000);
g_ptr_array_free (threadpool->domains, TRUE);
mono_mutex_destroy (&threadpool->domains_lock);
g_ptr_array_free (threadpool->parked_threads, TRUE);
mono_mutex_destroy (&threadpool->parked_threads_lock);
g_ptr_array_free (threadpool->working_threads, TRUE);
mono_mutex_destroy (&threadpool->working_threads_lock);
mono_mutex_destroy (&threadpool->heuristic_lock);
g_free (threadpool->heuristic_hill_climbing.samples);
g_free (threadpool->heuristic_hill_climbing.thread_counts);
rand_free (threadpool->heuristic_hill_climbing.random_interval_generator);
g_free (threadpool->cpu_usage_state);
g_assert (threadpool);
g_free (threadpool);
threadpool = NULL;
g_assert (!threadpool);
status = STATUS_CLEANED_UP;
}
static void
tp_epoll_wait (gpointer p)
{
SocketIOData *socket_io_data;
int epollfd;
MonoInternalThread *thread;
struct epoll_event *events, *evt;
int ready = 0, i;
gpointer async_results [EPOLL_NEVENTS * 2]; // * 2 because each loop can add up to 2 results here
gint nresults;
tp_epoll_data *data;
socket_io_data = p;
data = socket_io_data->event_data;
epollfd = data->epollfd;
thread = mono_thread_internal_current ();
events = g_new0 (struct epoll_event, EPOLL_NEVENTS);
while (1) {
mono_gc_set_skip_thread (TRUE);
do {
if (ready == -1) {
if (THREAD_WANTS_A_BREAK (thread))
mono_thread_interruption_checkpoint ();
}
ready = epoll_wait (epollfd, events, EPOLL_NEVENTS, -1);
} while (ready == -1 && errno == EINTR);
mono_gc_set_skip_thread (FALSE);
if (ready == -1) {
int err = errno;
g_free (events);
if (err != EBADF)
g_warning ("epoll_wait: %d %s", err, g_strerror (err));
return;
}
EnterCriticalSection (&socket_io_data->io_lock);
if (socket_io_data->inited == 3) {
g_free (events);
LeaveCriticalSection (&socket_io_data->io_lock);
return; /* cleanup called */
}
nresults = 0;
for (i = 0; i < ready; i++) {
int fd;
MonoMList *list;
MonoObject *ares;
evt = &events [i];
fd = evt->data.fd;
list = mono_g_hash_table_lookup (socket_io_data->sock_to_state, GINT_TO_POINTER (fd));
if (list != NULL && (evt->events & (EPOLLIN | EPOLL_ERRORS)) != 0) {
ares = get_io_event (&list, MONO_POLLIN);
if (ares != NULL)
async_results [nresults++] = ares;
}
if (list != NULL && (evt->events & (EPOLLOUT | EPOLL_ERRORS)) != 0) {
ares = get_io_event (&list, MONO_POLLOUT);
if (ares != NULL)
async_results [nresults++] = ares;
}
if (list != NULL) {
int p;
mono_g_hash_table_replace (socket_io_data->sock_to_state, GINT_TO_POINTER (fd), list);
p = get_events_from_list (list);
evt->events = (p & MONO_POLLOUT) ? EPOLLOUT : 0;
evt->events |= (p & MONO_POLLIN) ? EPOLLIN : 0;
if (epoll_ctl (epollfd, EPOLL_CTL_MOD, fd, evt) == -1) {
if (epoll_ctl (epollfd, EPOLL_CTL_ADD, fd, evt) == -1) {
int err = errno;
g_message ("epoll(ADD): %d %s", err, g_strerror (err));
}
}
} else {
mono_g_hash_table_remove (socket_io_data->sock_to_state, GINT_TO_POINTER (fd));
epoll_ctl (epollfd, EPOLL_CTL_DEL, fd, evt);
}
}
LeaveCriticalSection (&socket_io_data->io_lock);
threadpool_append_jobs (&async_io_tp, (MonoObject **) async_results, nresults);
mono_gc_bzero (async_results, sizeof (gpointer) * nresults);
}
}
static void
tp_kqueue_wait (gpointer p)
{
SocketIOData *socket_io_data;
int kfd;
MonoInternalThread *thread;
struct kevent *events, *evt;
int ready = 0, i;
gpointer async_results [KQUEUE_NEVENTS * 2]; // * 2 because each loop can add up to 2 results here
gint nresults;
tp_kqueue_data *data;
socket_io_data = p;
data = socket_io_data->event_data;
kfd = data->fd;
thread = mono_thread_internal_current ();
events = g_new0 (struct kevent, KQUEUE_NEVENTS);
while (1) {
mono_gc_set_skip_thread (TRUE);
do {
if (ready == -1) {
if (THREAD_WANTS_A_BREAK (thread))
mono_thread_interruption_checkpoint ();
}
ready = kevent (kfd, NULL, 0, events, KQUEUE_NEVENTS, NULL);
} while (ready == -1 && errno == EINTR);
mono_gc_set_skip_thread (FALSE);
if (ready == -1) {
int err = errno;
g_free (events);
if (err != EBADF)
g_warning ("kevent wait: %d %s", err, g_strerror (err));
return;
}
EnterCriticalSection (&socket_io_data->io_lock);
if (socket_io_data->inited == 3) {
g_free (events);
LeaveCriticalSection (&socket_io_data->io_lock);
return; /* cleanup called */
}
nresults = 0;
for (i = 0; i < ready; i++) {
int fd;
MonoMList *list;
MonoObject *ares;
evt = &events [i];
fd = evt->ident;
list = mono_g_hash_table_lookup (socket_io_data->sock_to_state, GINT_TO_POINTER (fd));
if (list != NULL && (evt->filter == EVFILT_READ || (evt->flags & EV_ERROR) != 0)) {
ares = get_io_event (&list, MONO_POLLIN);
if (ares != NULL)
async_results [nresults++] = ares;
}
if (list != NULL && (evt->filter == EVFILT_WRITE || (evt->flags & EV_ERROR) != 0)) {
ares = get_io_event (&list, MONO_POLLOUT);
if (ares != NULL)
async_results [nresults++] = ares;
}
if (list != NULL) {
int p;
mono_g_hash_table_replace (socket_io_data->sock_to_state, GINT_TO_POINTER (fd), list);
p = get_events_from_list (list);
if (evt->filter == EVFILT_READ && (p & MONO_POLLIN) != 0) {
EV_SET (evt, fd, EVFILT_READ, EV_ADD | EV_ENABLE | EV_ONESHOT, 0, 0, 0);
kevent_change (kfd, evt, "READD read");
}
if (evt->filter == EVFILT_WRITE && (p & MONO_POLLOUT) != 0) {
EV_SET (evt, fd, EVFILT_WRITE, EV_ADD | EV_ENABLE | EV_ONESHOT, 0, 0, 0);
kevent_change (kfd, evt, "READD write");
}
} else {
mono_g_hash_table_remove (socket_io_data->sock_to_state, GINT_TO_POINTER (fd));
}
}
LeaveCriticalSection (&socket_io_data->io_lock);
threadpool_append_jobs (&async_io_tp, (MonoObject **) async_results, nresults);
mono_gc_bzero (async_results, sizeof (gpointer) * nresults);
}
}
MonoBoolean
ves_icall_System_Threading_Mutex_ReleaseMutex_internal (gpointer handle)
{
MonoW32HandleType type;
MonoW32HandleMutex *mutex_handle;
pthread_t tid;
gboolean ret;
if (handle == NULL) {
mono_w32error_set_last (ERROR_INVALID_HANDLE);
return FALSE;
}
switch (type = mono_w32handle_get_type (handle)) {
case MONO_W32HANDLE_MUTEX:
case MONO_W32HANDLE_NAMEDMUTEX:
break;
default:
mono_w32error_set_last (ERROR_INVALID_HANDLE);
return FALSE;
}
if (!mono_w32handle_lookup (handle, type, (gpointer *)&mutex_handle)) {
g_warning ("%s: error looking up %s handle %p",
__func__, mono_w32handle_get_typename (type), handle);
return FALSE;
}
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER, "%s: releasing %s handle %p, tid: %p recursion: %d",
__func__, mono_w32handle_get_typename (type), handle, (gpointer) mutex_handle->tid, mutex_handle->recursion);
mono_w32handle_lock_handle (handle);
tid = pthread_self ();
if (mutex_handle->abandoned) {
// The Win32 ReleaseMutex() function returns TRUE for abandoned mutexes
ret = TRUE;
} else if (!pthread_equal (mutex_handle->tid, tid)) {
ret = FALSE;
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER, "%s: we don't own %s handle %p (owned by %ld, me %ld)",
__func__, mono_w32handle_get_typename (type), handle, (long)mutex_handle->tid, (long)tid);
} else {
ret = TRUE;
/* OK, we own this mutex */
mutex_handle->recursion--;
if (mutex_handle->recursion == 0) {
thread_disown_mutex (mono_thread_internal_current (), handle);
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER, "%s: unlocking %s handle %p, tid: %p recusion : %d",
__func__, mono_w32handle_get_typename (type), handle, (gpointer) mutex_handle->tid, mutex_handle->recursion);
mutex_handle->tid = 0;
mono_w32handle_set_signal_state (handle, TRUE, FALSE);
}
}
mono_w32handle_unlock_handle (handle);
return ret;
}
static void
async_invoke_thread (gpointer data)
{
MonoDomain *domain;
MonoInternalThread *thread;
MonoWSQ *wsq;
ThreadPool *tp;
gboolean must_die;
const gchar *name;
tp = data;
wsq = NULL;
if (!tp->is_io)
wsq = add_wsq ();
thread = mono_thread_internal_current ();
mono_profiler_thread_start (thread->tid);
name = (tp->is_io) ? "IO Threadpool worker" : "Threadpool worker";
mono_thread_set_name_internal (thread, mono_string_new (mono_domain_get (), name), FALSE);
if (tp_start_func)
tp_start_func (tp_hooks_user_data);
data = NULL;
for (;;) {
MonoAsyncResult *ar;
MonoClass *klass;
gboolean is_io_task;
gboolean is_socket;
int n_naps = 0;
is_io_task = FALSE;
ar = (MonoAsyncResult *) data;
if (ar) {
InterlockedIncrement (&tp->busy_threads);
domain = ((MonoObject *)ar)->vtable->domain;
#ifndef DISABLE_SOCKETS
klass = ((MonoObject *) data)->vtable->klass;
is_io_task = !is_corlib_asyncresult (domain, klass);
is_socket = FALSE;
if (is_io_task) {
MonoSocketAsyncResult *state = (MonoSocketAsyncResult *) data;
is_socket = is_socketasyncresult (domain, klass);
ar = state->ares;
switch (state->operation) {
case AIO_OP_RECEIVE:
state->total = ICALL_RECV (state);
break;
case AIO_OP_SEND:
state->total = ICALL_SEND (state);
break;
}
}
#endif
/* worker threads invokes methods in different domains,
* so we need to set the right domain here */
g_assert (domain);
if (mono_domain_is_unloading (domain) || mono_runtime_is_shutting_down ()) {
threadpool_jobs_dec ((MonoObject *)ar);
data = NULL;
ar = NULL;
InterlockedDecrement (&tp->busy_threads);
} else {
mono_thread_push_appdomain_ref (domain);
if (threadpool_jobs_dec ((MonoObject *)ar)) {
data = NULL;
ar = NULL;
mono_thread_pop_appdomain_ref ();
InterlockedDecrement (&tp->busy_threads);
continue;
}
if (mono_domain_set (domain, FALSE)) {
MonoObject *exc;
if (tp_item_begin_func)
tp_item_begin_func (tp_item_user_data);
if (!is_io_task && ar->add_time > 0)
process_idle_times (tp, ar->add_time);
exc = mono_async_invoke (tp, ar);
if (tp_item_end_func)
tp_item_end_func (tp_item_user_data);
if (exc)
mono_internal_thread_unhandled_exception (exc);
if (is_socket && tp->is_io) {
MonoSocketAsyncResult *state = (MonoSocketAsyncResult *) data;
if (state->completed && state->callback) {
MonoAsyncResult *cb_ares;
cb_ares = create_simple_asyncresult ((MonoObject *) state->callback,
(MonoObject *) state);
icall_append_job ((MonoObject *) cb_ares);
}
}
mono_domain_set (mono_get_root_domain (), TRUE);
}
mono_thread_pop_appdomain_ref ();
InterlockedDecrement (&tp->busy_threads);
/* If the callee changes the background status, set it back to TRUE */
mono_thread_clr_state (thread , ~ThreadState_Background);
if (!mono_thread_test_state (thread , ThreadState_Background))
ves_icall_System_Threading_Thread_SetState (thread, ThreadState_Background);
}
}
ar = NULL;
data = NULL;
must_die = should_i_die (tp);
if (!must_die && (tp->is_io || !mono_wsq_local_pop (&data)))
dequeue_or_steal (tp, &data, wsq);
n_naps = 0;
while (!must_die && !data && n_naps < 4) {
gboolean res;
InterlockedIncrement (&tp->waiting);
// Another thread may have added a job into its wsq since the last call to dequeue_or_steal
// Check all the queues again before entering the wait loop
dequeue_or_steal (tp, &data, wsq);
if (data) {
InterlockedDecrement (&tp->waiting);
break;
}
mono_gc_set_skip_thread (TRUE);
#if defined(__OpenBSD__)
while (mono_cq_count (tp->queue) == 0 && (res = mono_sem_wait (&tp->new_job, TRUE)) == -1) {// && errno == EINTR) {
#else
while (mono_cq_count (tp->queue) == 0 && (res = mono_sem_timedwait (&tp->new_job, 2000, TRUE)) == -1) {// && errno == EINTR) {
#endif
if (mono_runtime_is_shutting_down ())
break;
if (THREAD_WANTS_A_BREAK (thread))
mono_thread_interruption_checkpoint ();
}
InterlockedDecrement (&tp->waiting);
mono_gc_set_skip_thread (FALSE);
if (mono_runtime_is_shutting_down ())
break;
must_die = should_i_die (tp);
dequeue_or_steal (tp, &data, wsq);
n_naps++;
}
if (!data && !tp->is_io && !mono_runtime_is_shutting_down ()) {
mono_wsq_local_pop (&data);
if (data && must_die) {
InterlockedCompareExchange (&tp->destroy_thread, 1, 0);
pulse_on_new_job (tp);
}
}
if (!data) {
gint nt;
gboolean down;
while (1) {
nt = tp->nthreads;
down = mono_runtime_is_shutting_down ();
if (!down && nt <= tp->min_threads)
break;
if (down || InterlockedCompareExchange (&tp->nthreads, nt - 1, nt) == nt) {
mono_perfcounter_update_value (tp->pc_nthreads, TRUE, -1);
if (!tp->is_io) {
remove_wsq (wsq);
}
mono_profiler_thread_end (thread->tid);
if (tp_finish_func)
tp_finish_func (tp_hooks_user_data);
return;
}
}
}
}
g_assert_not_reached ();
}
void
ves_icall_System_Threading_ThreadPool_GetAvailableThreads (gint *workerThreads, gint *completionPortThreads)
{
*workerThreads = async_tp.max_threads - async_tp.busy_threads;
*completionPortThreads = async_io_tp.max_threads - async_io_tp.busy_threads;
}
void
mono_w32mutex_abandon (void)
{
MonoInternalThread *internal;
g_assert (mono_thread_internal_current_is_attached ());
internal = mono_thread_internal_current ();
g_assert (internal);
if (!internal->owned_mutexes)
return;
while (internal->owned_mutexes->len) {
MonoW32HandleType type;
MonoW32HandleMutex *mutex_handle;
MonoNativeThreadId tid;
gpointer handle;
handle = g_ptr_array_index (internal->owned_mutexes, 0);
switch (type = mono_w32handle_get_type (handle)) {
case MONO_W32HANDLE_MUTEX:
case MONO_W32HANDLE_NAMEDMUTEX:
break;
default:
g_assert_not_reached ();
}
if (!mono_w32handle_lookup (handle, type, (gpointer *)&mutex_handle)) {
g_error ("%s: error looking up %s handle %p",
__func__, mono_w32handle_get_typename (type), handle);
}
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER, "%s: abandoning %s handle %p",
__func__, mono_w32handle_get_typename (type), handle);
tid = MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid);
if (!pthread_equal (mutex_handle->tid, tid))
g_error ("%s: trying to release mutex %p acquired by thread %p from thread %p",
__func__, handle, (gpointer) mutex_handle->tid, (gpointer) tid);
mono_w32handle_lock_handle (handle);
mutex_handle->recursion = 0;
mutex_handle->tid = 0;
mutex_handle->abandoned = TRUE;
mono_w32handle_set_signal_state (handle, TRUE, FALSE);
thread_disown_mutex (internal, handle);
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER, "%s: abandoned %s handle %p",
__func__, mono_w32handle_get_typename (type), handle);
mono_w32handle_unlock_handle (handle);
}
g_ptr_array_free (internal->owned_mutexes, TRUE);
internal->owned_mutexes = NULL;
}